Level and frequency measuring recorder

Claim 2

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said input signal generating means includes audio-frequency generator means; wherein said control means includes a potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; and wherein said coupling means includes releasable coupling means.

Claim 3

Recording apparatus as set forth in claim 1, wherein said releasable coupling means comprises a friction wheel coupling.

Claim 4

Recording apparatus as set forth in claim 2, wherein said friction wheel coupling comprises a first wheel fixedly connected to said wiper arm of said potentiometer for rotation therewith.

Claim 5

Recording apparatus as set forth in claim 3, wherein said friction wheel coupling further comprises a swinging arm supporting said first wheel, a second wheel, and spring means for pressing said second wheel against said first wheel.

Claim 6

Recording apparatus as set forth in claim 4, wherein said first wheel has a circumference carrying a frequency scale.

Claim 7

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said rotary measuring means comprises a rotary measuring instrument and third amplifier means for driving said rotary measuring instrument; wherein movement of said measuring instrument induces a counter emf in said third amplifier means; and wherein said measuring means further comprises means for feeding back at least part of said counter emf to an input stage of said third amplifier means to constitute a feedback voltage.

Claim 8

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said rotary measuring means comprises a rotary measuring instrument and third amplifier means for driving said rotary measuring instrument; wherein movement of said measuring instrument induces a counter emf in said third amplifier means; and wherein said measuring means further comprises means for feeding back at least part of said counter emf to an input stage of said third amplifier means to constitute a feedback voltage.

Claim 9

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of rotation of 360°; and amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator.

Claim 10

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of rotation of 360°; and amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator.

Claim 11

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said input signal generator means includes audio-frequency generator means; wherein said control means includes a rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith, said potentiometer of said control means having a logarithmic variation of resistance and an angle of rotation of 360°; wherein said rotary potentiometer has an idle angle; and wherein said audio-frequency generator means furnishes a reference frequency signal when said wiper arm of said rotary potentiometer is in said idle angle.

Claim 12

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said input signal generator means includes audio-frequency generator means; wherein said control means includes a rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith, said potentiometer of said control means having a logarithmic variation of resistance and an angle of rotation of 360°; wherein said rotary potentiometer has an idle angle; and wherein said audio-frequency generator means furnishes a reference frequency signal when said wiper arm of said rotary potentiometer is in said idle angle.

Claim 13

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to sid input signal generating means to constitute said frequency control signal, wherein said input signal generator means includes audio-frequency generator means; wherein said control means includes a rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith, said potentiometer of said control means having a logarithmic variation of resistance and an angle of rotation of 360°; wherein said rotary potentiometer has an idle angle; wherein said audio-frequency generator means furnishes a reference frequency signal when said wiper arm of said rotary potentiometer is in said idle angle; and wherein said reference frequency signal is a signal having a frequency of 1 kHz.

Claim 14

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to sid input signal generating means to constitute said frequency control signal, wherein said input signal generator means includes audio-frequency generator means; wherein said control means includes a rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith, said potentiometer of said control means having a logarithmic variation of resistance and an angle of rotation of 360°; wherein said rotary potentiometer has an idle angle; wherein said audio-frequency generator means furnishes a reference frequency signal when said wiper arm of said rotary potentiometer is in said idle angle; and wherein said reference frequency signal is a signal having a frequency of 1 kHz.

Claim 15

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of variation of 360°; amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator; and further includes means connected to said audio-frequency generator means for wobbling said audio-frequency signal.

Claim 16

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of variation of 360°; amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator; and further includes means connected to said audio-frequency generator means for wobbling said audio-frequency signal.

Claim 17

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, and wherein said movable recording means includes a recording stylus movable at a selected one of the plurality of recording speeds, said recording stylus includes an electrically heated resistance element; and further includes means for heating said resistance element in accordance with said selected one of said plurality of recording speeds.

Claim 18

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, and wherein said movable recording means includes a recording stylus movable at a selected one of the plurality of recording speeds, said recording stylus includes an electrically heated resistance element; and further includes means for heating said resistance element in accordance with said selected one of said plurality of recording speeds.

Claim 19

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of rotation of 360°; amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator; and wherein said releasable coupling means includes a function wheel coupling, said coupling having a first wheel fixedly connected to said wiper arm of said potentiometer for rotation therewith, a swinging arm supporting the first wheel, a second wheel, and spring means for pressing said second wheel against said first wheel and wherein the first wheel has a circumference carrying a frequency scale.

Claim 20

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of rotation of 360°; amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator; and wherein said releasable coupling means includes a function wheel coupling, said coupling having a first wheel fixedly connected to said wiper arm of said potentiometer for rotation therewith, a swinging arm supporting the first wheel, a second wheel, and spring means for pressing said second wheel against said first wheel and wherein the first wheel has a circumference carrying a frequency scale.

Claim 21

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of variation of 360°; amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator; further includes means connected to said audio-frequency generator means for wobbling said audio-frequency signal; and wherein said releasable coupling means includes a function wheel coupling, said coupling having a first wheel fixedly connected to said wiper arm of said potentiometer for rotation therewith, a swinging arm supporting the first wheel, a second wheel, and spring means for pressing said second wheel against said first wheel and wherein the first wheel has a circumference carrying a frequency scale.

Claim 22

In apparatus for recording output signals furnished by a unit under test in response to input signals applied thereto, said apparatus having means for generating input signals having a frequency varying as a function of a frequency control signal, means for applying said input signals to said unit under test, record carrier means, transport means for transporting said record carrier means along a predetermined path and movable recording means for recording signals on said record carrier means, the improvement comprising: rotary measuring means connected to said movable recording means for driving said movable recording means in accordance with a drive signal applied to said rotary measuring means; first and second amplifier means having, respectively, a linear and a logarithmic transfer characteristic; selector means for selectively interconnecting one of said first and second amplifier means between said unit under test and said rotary measurement means so that the so-selected one of said amplifier means furnishes an amplified output signal constituting said drive signal; and control means coupled to said transport means for furnishing a position signal indicative of the position of said record carrier means relative to a starting position and for applying said position signal to said input signal generating means to constitute said frequency control signal, wherein said control means includes a substantially linear rotary potentiometer having a wiper arm and means for coupling the wiper arm to the transport means for movement therewith; wherein said input signal generating means includes a voltage controlled audio-frequency generator and wherein said frequency control signal is a frequency control voltage, said potentiometer having a logarithmic variation of resistance and an angle of variation of 360°; amplifier means connected to said linear rotary potentiometer for furnishing a frequency control signal varying as an exponential function of said position signal to said audio-frequency generator; further includes means connected to said audio-frequency generator means for wobbling said audio-frequency signal; and wherein said releasable coupling means includes a function wheel coupling, said coupling having a first wheel fixedly connected to said wiper arm of said potentiometer for rotation therewith, a swinging arm supporting the first wheel, a second wheel, and spring means for pressing said second wheel against said first wheel and wherein the first wheel has a circumference carrying a frequency scale.