Patent US3593184A successfully refreshed from Google Patents.
US3593184A
Expired / Lapsed
US
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Comb marker generating apparatus for simultaneously providing a plurality of marker pulses at different individually identifiable marker intervals
Assignee: Eaton Corp
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Filing: 1969-11-20
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Granted: 1971-07-13
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Expires: 1989-11-20
Abstract
Abstract Comb marker generator apparatus for simultaneously providing a number of sets of marker pulses having different marker intervals and having marker interval identifiable characteristics. A means is provided for generating a harmonic spectrum of a reference frequency high enough to make it a simple matter to obtain enough harmonics to cover the desired frequency range. This harmonic spectrum is then mixed with an unknown signal to provide a difference frequency from which marker pulses at the reference frequency can be generated. Marker pulses at frequency intervals of less than the selected reference frequency are provided by mixing one or more submultiples of the reference frequency with said difference frequency to provide pulses which can then be added to the reference frequency pulses to simultaneously provide markers at several frequency intervals. Means are provided at each source for controlling the amplitude or other characteristic of a set of pulses so that a set of pulses at one marker interval can be distinguished from those of other marker intervals.
Inventors
- 👤 Jose Luis Herrero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:43
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R27/32
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
182 words
A comb marker generator for generating a series of marker pulses for a variable frequency signal comprising: first generating means for generating a first reference signal; first mixer means responsive to said first reference signal and said variable frequency signal and operative to generate first difference signals commensurate with the difference of the frequency of said variable frequency signal and said first reference signal and its harmonics first pulse-forming circuit means responsive to a predetermined characteristic of said first difference signals and operative to develop first marker pulses in response thereto; second generating means for generating a second reference signal; second mixer means responsive to said second refeRence signal and said first difference signals and operative to generate second difference signals commensurate with the difference of the frequency of said first difference signals and said second reference signal and its harmonics; second pulse-forming circuit means responsive to a predetermined characteristic of said second difference signals and operative to develop second marker pulses in response thereto; and means for adding said first and second marker pulses to form the series of marker pulses.
Claim 2
Dependent Claim
182 words
A comb marker generator for generating a series of marker pulses for a variable frequency signal comprising: first generating means for generating a first reference signal; first mixer means responsive to said first reference signal and said variable frequency signal and operative to generate first difference signals commensurate with the difference of the frequency of said variable frequency signal and said first reference signal and its harmonics first pulse-forming circuit means responsive to a predetermined characteristic of said first difference signals and operative to develop first marker pulses in response thereto; second generating means for generating a second reference signal; second mixer means responsive to said second refeRence signal and said first difference signals and operative to generate second difference signals commensurate with the difference of the frequency of said first difference signals and said second reference signal and its harmonics; second pulse-forming circuit means responsive to a predetermined characteristic of said second difference signals and operative to develop second marker pulses in response thereto; and means for adding said first and second marker pulses to form the series of marker pulses.
Claim 3
Dependent Claim
51 words
A comb marker generator for generating a series of marker pulses as recited in claim 1 wherein said means for adding said first and second marker pulses is an impedance network for causing the amplitudes of said first marker pulses to be different from the amplitudes of said second marker pulses.
Claim 4
Dependent Claim
101 words
A comb marker generator as recited in claim 1 which further includes: third generating means for generating a third reference signal; third mixer means responsive to said third reference signal and said first difference signals and operative to generate third difference signals commensurate with the difference of the frequency of said first difference signals and said third reference signal and its harmonics; third pulse-forming circuit means responsive to a predetermined characteristic of said third difference signals and operative to develop third marker pulses in response thereto; and means for adding said third marker pulses to said first and second marker pulses.
Claim 5
Dependent Claim
51 words
A comb marker generator as recited in claim 3 wherein said means for adding said third marker pulses to said first and second marker pulses is an impedance network for causing the amplitude of said third marker pulses to be different from the amplitude of said first and second marker pulses.
Claim 6
Dependent Claim
195 words
Apparatus for generating a series of marker pulses for use with a variable frequency signal comprising: first signal-generating means for generating a first reference signal first mixer means for mixing said first reference signal and said variable frequency signal and for providing a first mixed signal: band-pass filter means responsive to said first mixed signal and operative to pass only the difference frequency portion of said first mixed signal first pulse-forming means responsive to said filtered first mixed signal and operative to provide first marker pulses upon the occurrence of a predetermined characteristic of said filtered first mixed signal; second signal generating means for generating a second reference signal, the frequency of said second reference signal being a submultiple of the frequency of said first reference signal; second mixer means for mixing said second reference signal and said filtered first mixed signal and for providing a second mixed signal; second pulse-forming means responsive to said second mixed signal and operative to provide second marker pulses upon the occurrence of a predetermined characteristic of said second mixed signal; and adding means for adding said first and second marker pulses to develop the series of marker pulses.
Claim 7
Dependent Claim
195 words
Apparatus for generating a series of marker pulses for use with a variable frequency signal comprising: first signal-generating means for generating a first reference signal first mixer means for mixing said first reference signal and said variable frequency signal and for providing a first mixed signal: band-pass filter means responsive to said first mixed signal and operative to pass only the difference frequency portion of said first mixed signal first pulse-forming means responsive to said filtered first mixed signal and operative to provide first marker pulses upon the occurrence of a predetermined characteristic of said filtered first mixed signal; second signal generating means for generating a second reference signal, the frequency of said second reference signal being a submultiple of the frequency of said first reference signal; second mixer means for mixing said second reference signal and said filtered first mixed signal and for providing a second mixed signal; second pulse-forming means responsive to said second mixed signal and operative to provide second marker pulses upon the occurrence of a predetermined characteristic of said second mixed signal; and adding means for adding said first and second marker pulses to develop the series of marker pulses.
Claim 8
Dependent Claim
44 words
Apparatus for generating a series of marker pulses as recited in claim 5 wherein said adding means is a resistive network which is adjustable to cause the amplitudes of said first marker pulses to be greater than the amplitudes of said second marker pulses.
Claim 9
Dependent Claim
92 words
Appparatus for generating a series of marker pulses as recited in claim 5 which further includes: further signal-generating means for generating further reference signals; further mixer means for mixing said further reference signals and said filtered first mixed signal and for providing further mixed signals; and further pulse forming means responsive to said further mixed signals and operative to provide further marker pulses upon the occurrence of a predetermined characteristic of said further mixed signals, said further marker pulses being added to said first and second marker pulses by sAid adding means.
Claim 10
Dependent Claim
39 words
Apparatus for generating a series of marker pulses as recited in claim 7 wherein said adding means includes an impedance network for adjusting the respective amplitudes of said first, second and further marker pulses to have a predetermined relationship.
Claim 11
Dependent Claim
29 words
A comb marker generator in accordance with claim 1 in which the frequency of said second reference signal is a submultiple of the frequency of said first reference signal.
Claim 12
Dependent Claim
50 words
A comb marker in accordance with claim 9 which further includes a band pass filter for filtering said first difference signals, the pass band of said filter extending from substantially zero frequency to a frequency which is substantially one-half of the desired frequency separation between immediately adjacent first marker pulses.
Claim 13
Dependent Claim
50 words
A comb marker generator in accordance with claim 3 in which the frequency of said third reference signal is a submultiple of the frequency of said second reference signal and in which the frequency of said second reference signal is a submultiple of the frequency of said first reference signals.
Claim 14
Dependent Claim
37 words
Apparatus in accordance with claim 5 in which the band pass of said filter means extends from substantially zero frequency to a frequency which is about one-half of the desired frequency separation between adjacent first marker pulses.
Claim 15
Dependent Claim
37 words
Apparatus in accordance with claim 12 in which said first reference signal is comprised of a first reference frequency and its harmonics and said second reference frequency is comprised of a second reference frequency and its harmonics.
Claim 16
Dependent Claim
31 words
Apparatus in accordance with claim 12 in which said first and second mixer means are harmonic mixers to generate mixed signals including difference frequencies of the reference signals and their harmonics.
References Cited (Backward Citations)
US3427536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |