Frequency deviation compensation system

Claim 2

Apparatus for reproducing first and second frequency modulated information signals that have been recorded on a record simultaneously with a reference signal at constant frequency, said information signals comprising carrier signals at different center frequencies each modulated in frequency over a narrow band relative to the center frequency, said apparatus comprising transducer means for simultaneously reproducing said signals with wow and flutter deviations, means selectively responsive to said transducer means for producing said reproduced reference signal, means selectively responsive to said transducer means for producing said reproduced first information signal, means selectively responsive to said transducer means for producing said reproduced second information signal, means responsive to said reproduced reference signal for producing a first derived reference signal offset in frequency from the frequency of said first information signal and containing substantially the same wow and flutter deviations as said first reproduced information signal, means for combining said first derived reference signal with said first reproduced information signal to produce a first offset signal in which wow and flutter deviations are substantially cancelled, means responsive to said reproduced reference signal for producing a second derived reference signal offset in frequency from the frequency of said first information signal and containing substantially the same wow and flutter deviations as said second reproduced information signal, means for combining said second derived reference signal with said second reproduced information signal to produce a second offset signal in which wow and flutter deviations are substantially cancelled, means for modulating said first offset signal at a fixed frequency to produce a first frequency modulated output signal corresponding to said first recorded information signal, and means for modulating said second offset signal at a fixed frequency to produce a second frequency modulated output signal corresponding to said second recorded information signal.

Claim 3

Apparatus for reproducing first and second information signals, said information signals comprising carrier signals at first and second different center frequencies each modulated in frequency over a narrow band relative to the center frequency when said information signals have been recorded simultaneously with a first reference signal at a third frequency, said apparatus comprising means for simultaneously reproducing said recorded signals with wow and flutter Deviation so that the wow and flutter deviations in each signal are proportional to the wow and flutter deivations in the other signals, means for producing a second reference signal at a fourth frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first information signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second information signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first information signal, means for producing a fourth reference signal at a sixth fixed frequency, and means for combining said forth reference signal and said second side band signal to produce a second output signal corresponding in modualated frequency to said second information signal.

Claim 4

Apparatus for reproducing first and second information signals, said information signals comprising carrier signals at first and second different center frequencies each modulated in frequency over a narrow band relative to the center frequency when said information signals have been recorded simultaneously with a first reference signal at a third frequency, said apparatus comprising means for simultaneously reproducing said recorded signals with wow and flutter Deviation so that the wow and flutter deviations in each signal are proportional to the wow and flutter deivations in the other signals, means for producing a second reference signal at a fourth frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first information signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second information signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first information signal, means for producing a fourth reference signal at a sixth fixed frequency, and means for combining said forth reference signal and said second side band signal to produce a second output signal corresponding in modualated frequency to said second information signal.

Claim 5

The apparatus of claim 2 in which said first information signal has a frequency np + or - Delta f1, said second information signal has a frequency mp + or - Delta f2, said first reference signal has a frequency mnp, said second reference signal has a frequency 2mnp+nb, said third reference signal has a frequency np+(nb/m), and said fourth reference signal has a frequency mp+ b, where m, n, p and b are constants and Delta f1, and Delta f2 are information frequency components modulated on said carriers, and in which said first frequency dividing means divides the frequency of said first derived signal by m, and said second frequency dividing means divides the frequency of said first derived signal by n.

Claim 6

The apparatus of claim 2, in which said means for combining said reproduced first reference signal with said second reference signal comprises frequency multiplying means responsive to said reproduced first reference signal for producing a signal having a frequency that is a predetermined multiple of the frequency of said first reproduced reference signal, modulating means responsive to said second reference signal for modulating the signal from said frequency multiplying means at the frequency of said second reference signal to produce a modulated signal, and filter means responsive to a predetermined side band of said modulated signal for producing said first derived signal.

Claim 7

The apparatus of claim 4, in which said first position signal has a frequency np + or - Delta f1, said second position signal has a frequency mp + or - Delta f2, said first reference signal has a frequency mnp/K, said second reference signal has a frequency 2mnp+nb, said third reference signal has a frequency np+(nb/m), and said fourth reference signal has a frequency mp+b, where m, n, p, K and b are constants and Delta f1 and Delta f2 are information frequency components modulated on said cArriers, and in which said predetermined multiple is K, said first frequency dividing means divides the frequency of said first derived signal by m, and said second frequency dividing means divides the frequency of said first derived signal by n.

Claim 8

Apparatus for reproducing first and second frequency modulated information signals that have been recorded on a record as carrier signals at different center frequencies each modulated in frequency over a narrow band relative to the center frequency simultaneously with a reference signal at constant frequency, comprising transducer means for simultaneously reproducing said signals with wow and flutter deviations, first filter means selectively responsive to said transducer means for producing said reproduced reference signal with a first delay, second filter means having a delay matched to said first filter means and selectively responsive to said transducer means for producing said reproduced first information signal with said first delay, third filter means having a delay matched to said first filter means and selectively responsive to said transducer means for producing said reproduced second information signal with said first delay, means responsive to said reproduced reference signal for producing a first derived reference signal offset in frequency from the frequency of said first information signal and containing substantially the same wow and flutter deviations as said first reproduced information signal, means for combining said first derived reference signal with said first reproduced information signal to produce a first offset signal in which wow and flutter deviations are substantially cancelled, means responsive to said reproduced reference signal for producing a second derived reference signal offset in frequency from the frequency of said first information signal and containing substantially the same wow and flutter deviations as said second reproduced information signal, means for combining said second derived reference signal with said second reproduced information signal to produce a second offset signal in which wow and flutter deviations are substantially cancelled, means for modulating said first offset signal at a fixed frequency to produce a first frequency modulated output signal corresponding to said first recorded information signal, and means for modulating said second offset signal at a fixed frequency to produce a second frequency modulated output signal corresponding to said second recorded information signal.

Claim 9

Apparatus for reproducing first and second frequency modulated information signals that have been recorded on a record as carrier signals at different center frequencies each modulated in frequency over a narrow band relative to the center frequency simultaneously with a reference signal at constant frequency, comprising transducer means for simultaneously reproducing said signals with wow and flutter deviations, first filter means selectively responsive to said transducer means for producing said reproduced reference signal with a first delay, second filter means having a delay matched to said first filter means and selectively responsive to said transducer means for producing said reproduced first information signal with said first delay, third filter means having a delay matched to said first filter means and selectively responsive to said transducer means for producing said reproduced second information signal with said first delay, means responsive to said reproduced reference signal for producing a first derived reference signal offset in frequency from the frequency of said first information signal and containing substantially the same wow and flutter deviations as said first reproduced information signal, means for combining said first derived reference signal with said first reproduced information signal to produce a first offset signal in which wow and flutter deviations are substantially cancelled, means responsive to said reproduced reference signal for producing a second derived reference signal offset in frequency from the frequency of said first information signal and containing substantially the same wow and flutter deviations as said second reproduced information signal, means for combining said second derived reference signal with said second reproduced information signal to produce a second offset signal in which wow and flutter deviations are substantially cancelled, means for modulating said first offset signal at a fixed frequency to produce a first frequency modulated output signal corresponding to said first recorded information signal, and means for modulating said second offset signal at a fixed frequency to produce a second frequency modulated output signal corresponding to said second recorded information signal.

Claim 10

Apparatus for reproducing first and second information signals, said information signals comprising carrier signals at first and second different center frequencies each modulated in frequency over a narrow band relative to the center frequency, when said information signals have been recorded simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals with wow and flutter deviations so that the wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, first, second and third filter means having matched delays and being selectively responsive to said first and said second information signals and said reference signal, respectively, to produce corresponding equally delayed signals, means for producing a second reference signal at a fourth frequency, means for combining said delayed first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said delayed first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed first information signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed second information signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said delayed second information signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first information signal, means for producing a fourth reference signal at a sixth fixed frequency, and means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second information signal.

Claim 11

Apparatus for reproducing first and second information signals, said information signals comprising carrier signals at first and second different center frequencies each modulated in frequency over a narrow band relative to the center frequency, when said information signals have been recorded simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals with wow and flutter deviations so that the wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, first, second and third filter means having matched delays and being selectively responsive to said first and said second information signals and said reference signal, respectively, to produce corresponding equally delayed signals, means for producing a second reference signal at a fourth frequency, means for combining said delayed first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said delayed first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed first information signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed second information signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said delayed second information signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first information signal, means for producing a fourth reference signal at a sixth fixed frequency, and means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second information signal.

Claim 12

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simyltaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, means for producing a second reference signal at a fourth fixed frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first position signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second position signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals for moving said pen to positions determined by said output signals.

Claim 13

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simyltaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, means for producing a second reference signal at a fourth fixed frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first position signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second position signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals for moving said pen to positions determined by said output signals.

Claim 14

The apparatus of claim 8, in which said first position signal has a frequency np + or - Delta f1, said second position signal has a frequency mp + or - Delta f2, said first reference signal has a frequency mnp, said second reference signal has a frequencY 2mnp+nb, said third reference signal has a frequency np+(nb/m), and said fourth reference signal has a frequency mp+b, where m, n, p and b are constants and Delta f1 and Delta f2 are frequency components representing said coordinates of the position of the pen, and in which said first frequency dividing means divides the frequency of said first derived signal by m, and said second frequency dividing means divides the frequency of said first derived signal by n.

Claim 15

The apparatus of claim 8, in which said means for combining said reproduced first reference signal with said second reference signal comprises frequency multiplying means responsive to said reproduced first reference signal for producing a signal having a frequency that is a predetermined multiple of the frequency of said first reproduced reference signal, modulating means responsive to said second reference signal for modulating the signal from said frequency multiplying means at the frequency of said second reference signal to produce a modulated signal, and filter means responsive to a predetermined side band of said modulated signal for producing said first derived signal.

Claim 16

The apparatus of claim 10, in which said first position signal has a frequency np + or - Delta f1, said second position signal has a frequency mp + or - Delta f2, said frist reference signal has a frequency mnp/K, said second reference signal has a frequency 2mnp+nb, said third reference signal has a frequency np+(nb/m), and said fourth reference signal has a frequency mp+b, where m, n, p, K and b are constants and Delta f1 and Delta f2 are frequency components representing said coordinates of the position of said first stylus, and in which said predetermined multiple is K, said first frequency dividing means divides the frequency of said first derived signal by m, and said second frequency dividing means divides the frequency of said first derived signal by n.

Claim 17

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, detecting means responsive to the level of one of said reproduced signals for producing a switching signal when said level is above a predetermined value, means for producing a second reference signal at a fourth fixed frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first position signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second position signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal wiTh said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means controlled by said detecting means and responsive to said output signals for moving said pen to positions determined by said output signals when said switching signal is present.

Claim 18

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, detecting means responsive to the level of one of said reproduced signals for producing a switching signal when said level is above a predetermined value, means for producing a second reference signal at a fourth fixed frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first position signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second position signal and having a frequency offset from said second frequency, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal wiTh said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means controlled by said detecting means and responsive to said output signals for moving said pen to positions determined by said output signals when said switching signal is present.

Claim 19

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, first, second and third filter means having matched delays and being selectively responsive to said reproduced first and second modulated carrier signals and to said reproduced first reference signal, respectively, to produce corresponding equally delayed signals, means for producing a second reference signal at a fourth fixed frequency, means for combining said delayed first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for roducing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed first position signal and having a center frequency offset from said first frequency, said frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed second position signal and having a frequency offset from said second frequency, means for combining said delayed first position signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said delayed signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals for moving said pen to positions determined by said output signals.

Claim 20

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, first, second and third filter means having matched delays and being selectively responsive to said reproduced first and second modulated carrier signals and to said reproduced first reference signal, respectively, to produce corresponding equally delayed signals, means for producing a second reference signal at a fourth fixed frequency, means for combining said delayed first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for roducing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed first position signal and having a center frequency offset from said first frequency, said frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed second position signal and having a frequency offset from said second frequency, means for combining said delayed first position signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said delayed signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals for moving said pen to positions determined by said output signals.

Claim 21

Apparatus for reproducing handwritten inscriptions from first and second postion signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carrIers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals to that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, filter means having matched delays for separating said reproduced signals and producing corresponding first delayed position, aid second delayed position and first delayed reference signals with equal delays, means responsive to one of said delayed signals for producing a gating signal when said one delayed signal is present, means for producing a second reference signal at a fourth fixed frequency, means for combining said first delayed reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said first delayed position signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said second delayed position signal and having a frequency offset from said second frequency, means for combining said first delayed position signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said second delayed signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to aid second position signal, a pen adapted to be moved to record an inscription on a record sheet, control means responsive to applied position signals for moving said pen to positions determined by said position signals, and gating means responsive to said gating signal for applying said output signals to said control means.

Claim 22

Apparatus for reproducing handwritten inscriptions from first and second postion signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carrIers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals to that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, filter means having matched delays for separating said reproduced signals and producing corresponding first delayed position, aid second delayed position and first delayed reference signals with equal delays, means responsive to one of said delayed signals for producing a gating signal when said one delayed signal is present, means for producing a second reference signal at a fourth fixed frequency, means for combining said first delayed reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said fourth frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said first delayed position signal and having a center frequency offset from said first frequency, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said second delayed position signal and having a frequency offset from said second frequency, means for combining said first delayed position signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said second delayed signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a fifth fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to first position signal, means for producing a fourth reference signal at a sixth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding in modulated frequency to aid second position signal, a pen adapted to be moved to record an inscription on a record sheet, control means responsive to applied position signals for moving said pen to positions determined by said position signals, and gating means responsive to said gating signal for applying said output signals to said control means.

Claim 23

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, first, second and third filter means having matched delays and being selectively responsive to said reproduced first and second modulated carrier signals and to said reproduced first reference signal for producing corresponding equally delayed signals, first circuit means responsive to said delayed first reference signal for producing a first correction signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed first position signal and having a center frequency offset from said first frequency, second circuit means responsive to said delayed first reference signal for producing a second correction siGnal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed second position signal and having a frequency offset from said second frequency, means for combining said delayed first position signal with said first correction signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said delayed second position signal with said second correction signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for offsetting the frequency of said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for offsetting the frequency of said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals. for moving said pen to positions determined by said output signals.

Claim 24

Apparatus for reproducing handwritten inscriptions from first and second position signals representing the coordinates of the position of a pen on a record sheet as a function of time, when said position signals have been recorded as frequency modulations on first and second carriers having first and second center frequencies, respectively, simultaneously with a first reference signal at a third frequency, said apparatus comprising, means for simultaneously reproducing said recorded signals so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, first, second and third filter means having matched delays and being selectively responsive to said reproduced first and second modulated carrier signals and to said reproduced first reference signal for producing corresponding equally delayed signals, first circuit means responsive to said delayed first reference signal for producing a first correction signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed first position signal and having a center frequency offset from said first frequency, second circuit means responsive to said delayed first reference signal for producing a second correction siGnal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said delayed second position signal and having a frequency offset from said second frequency, means for combining said delayed first position signal with said first correction signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said delayed second position signal with said second correction signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for offsetting the frequency of said first side band signal to produce a first output signal corresponding in modulated frequency to said first position signal, means for offsetting the frequency of said second side band signal to produce a second output signal corresponding in modulated frequency to said second position signal, a pen adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals. for moving said pen to positions determined by said output signals.

Claim 25

A facsimile handwriting system for recording and later reproducing handwritten inscriptions, comprising a transmitter for producing signals corresponding to an inscription to be recorded and reproduced, record means for storing said signals and a receiver responsive to signals reproduced from said record for producing an inscription represented by said reproduced signals, said transmitter comprising a first stylus adapted to be manually manipulated to graphically record an inscription on a record sheet, first transducer means connected to said stylus for producing a first position signal comprising a first carrier frequency modulated in accordance with a first coordinate of the position of said stylus relative to a reference position, second transducer means connected to said stylus for producing a second position signal comprising a second carrier frequency modulated in accordance with a second coordinate of the position of said stylus relative to said reference position, means for producing a first reference signal at a first fixed frequency, and means for simultaneously recording said position signals and said first reference signal on said record, said receiver comprising means for simultaneously reproducing said signals from said record so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, means for producing a second reference signal at a second fixed frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said second fixed frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first position signal and having a center frequency offset from the frequency of said first carrier, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second position signal and having a frequency offset from the frequency of said second carrier, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a third fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to saiD first position signal, means for producing a fourth reference signal at a fourth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding to modulated frequency to said second position signal, a second stylus adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals for moving said second stylus to positions determined by said output signals.

Claim 26

A facsimile handwriting system for recording and later reproducing handwritten inscriptions, comprising a transmitter for producing signals corresponding to an inscription to be recorded and reproduced, record means for storing said signals and a receiver responsive to signals reproduced from said record for producing an inscription represented by said reproduced signals, said transmitter comprising a first stylus adapted to be manually manipulated to graphically record an inscription on a record sheet, first transducer means connected to said stylus for producing a first position signal comprising a first carrier frequency modulated in accordance with a first coordinate of the position of said stylus relative to a reference position, second transducer means connected to said stylus for producing a second position signal comprising a second carrier frequency modulated in accordance with a second coordinate of the position of said stylus relative to said reference position, means for producing a first reference signal at a first fixed frequency, and means for simultaneously recording said position signals and said first reference signal on said record, said receiver comprising means for simultaneously reproducing said signals from said record so that wow and flutter deviations in each signal are proportional to the wow and flutter deviations in the other signals, means for producing a second reference signal at a second fixed frequency, means for combining said reproduced first reference signal with said second reference signal to produce a first derived signal at a frequency offset from the frequency of said reproduced first reference signal by said second fixed frequency, first frequency dividing means responsive to said first derived signal for producing a second derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced first position signal and having a center frequency offset from the frequency of said first carrier, second frequency dividing means responsive to said first derived signal for producing a third derived signal in which wow and flutter deviations are equal in amplitude to corresponding deviations in said reproduced second position signal and having a frequency offset from the frequency of said second carrier, means for combining said reproduced first signal with said second derived signal to produce a first side band signal in which wow and flutter frequency deviations are substantially cancelled, means for combining said reproduced second signal with said third derived signal to produce a second side band signal in which wow and flutter deviations are substantially cancelled, means for producing a third reference signal at a third fixed frequency, means for combining said third reference signal and said first side band signal to produce a first output signal corresponding in modulated frequency to saiD first position signal, means for producing a fourth reference signal at a fourth fixed frequency, means for combining said fourth reference signal and said second side band signal to produce a second output signal corresponding to modulated frequency to said second position signal, a second stylus adapted to be moved to record an inscription on a record sheet, and means responsive to said output signals for moving said second stylus to positions determined by said output signals.

Claim 27

The apparatus of claim 16, in which the first position signal has frequency np + or - Delta f1, said second position signal has a frequency mp + or - Delta f2, said first reference signal has a frequency mnp, said second reference signal has a frequency 2mnp+nb, said third reference signal has a frequency np+(nb/m), and said fourth reference signal has a frequency mp+b, where m, n, p, and b are constants, and Delta f1 and Delta f2 are frequency components representing said coordinates of the position of said first stylus, and in which said first frequency dividing means divides the frequency of said first derived signal by m, and said second frequency dividing means divides the frequency of said first derived signal by n.

Claim 28

The apparatus of claim 16, in which said means for combining said reproduced first reference signal with said second reference signal comprises frequency multiplying means responsive to said reproduced first reference signal for producing a signal having a frequency that is a predetermined multiple of the frequency of said first reproduced reference signal, modulating means responsive to said second reference signal for modulating the signal from said frequency multiplying means at the frequency of said second reference signal to produce a modulated signal, and filter means responsive to a predetermined side band of said modulated signal for producing said first derived signal.

Claim 29

The apparatus of claim 18, in which said first position signal has a frequency np + or - Delta f1, said second position signal has a frequency mp + or - Delta f2, said first reference signal has a frequency mnp/K, said second reference signal has a frequency 2mnp+nb, said third reference signal has a frequency np+(nb/m), and said fourth reference signal has a frequency mp+b, where m, n, p, K and b are constants and Delta f1 and Delta f2 are frequency components representing said coordinates of the position of said first stylus, and in which said predetermined multiple is K, said first frequency dividing means divides the frequency of said first derived signal by m, and said second frequency dividing means divides the frequency of said first derived signal by n.