US3626397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displacement measuring instrument
Assignee: Sony Corp
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Filing: 1969-09-30
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Granted: 1971-12-07
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Expires: 1989-09-30
Abstract
Abstract A displacement measuring instrument having means for producing a carrier signal, a transducer supplied with the carrier signal from the above means to phase modulate the carrier signal in accordance with a displacement, means for multiplying the phasemodulated signal, means for demodulating the multiplied, phasemodulated signal and means for counting the displacement with the demodulated signal.
Inventors
- 👤 Saburo Uemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:53
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A displacement measuring instrument comprising oscillator means for producing a carrier signal, demultiplier means acting on said carrier signal to provide a demultiplied carrier signal, transducer means supplied with said demultiplied carrier signal and being operative to phase modulate said demultiplied carrier signal in accordance with a displacement, means for multiplying the phase-modulated demultiplied carrier signal, means for demodulating the multiplied phase-modulated signal, and counting means operated by the demodulated signal to indicate said displacement.
Claim 2
Dependent Claim
75 words
A displacement measuring instrument comprising oscillator means for producing a carrier signal, demultiplier means acting on said carrier signal to provide a demultiplied carrier signal, transducer means supplied with said demultiplied carrier signal and being operative to phase modulate said demultiplied carrier signal in accordance with a displacement, means for multiplying the phase-modulated demultiplied carrier signal, means for demodulating the multiplied phase-modulated signal, and counting means operated by the demodulated signal to indicate said displacement.
Claim 3
Dependent Claim
21 words
A displacement measuring instrument according to claim 1, in which said means for multiplying the phase-modulated signal is a frequency doubler.
Claim 4
Dependent Claim
32 words
A displacement measuring instrument according to claim 1, wherein said means for demodulating the multiplied phase-modulated signal includes phase-comparator means comparing the phases of said multiplied phase-modulated signal and a reference signal.
Claim 5
Dependent Claim
42 words
A displacement measuring instrument according to claim 1, in which said means for multiplying the phase-modulated signal brings back the frequency of the latter to the frequency of said carrier signal, and said reference signal is the carrier signal from said oscillator.
Claim 6
Dependent Claim
22 words
A displacement measuring instrument according to claim 1, in which said means for demodulating the multiplied phase-modulated signal includes two amplitude detectors.
Claim 7
Dependent Claim
34 words
A displacement measuring instrument according to claim 5, in which said amplitude detectors are supplied with said multiplied phase-modulated signal and with reference signals that are respectively 90* out of phase with each other.
Claim 8
Dependent Claim
19 words
A displacement measuring instrument according to claim 6, in which said reference signals are obtained from said oscillator means.
References Cited (Backward Citations)
US2947929A
Cited
US3308449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |