US3998088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing apparatus for incremental shaft encoder
Assignee: United States Department of the Air Force
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Filing: 1975-11-12
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Granted: 1976-12-21
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Expires: 1995-11-12
Abstract
Abstract An apparatus for testing an incremental shaft encoder in which the encoder is placed upon a rate table together with a gyroscope to permit coincident rotation. Every time the shaft of the incremental shaft encoder turns through a complete cycle, the leading edges of a square wave output generated by the encoder, start and stop a counter which is fed by a frequency signal derived from the rotating gyroscope through a voltage-to-frequency converter. The counter output then is applied to a printer.
Inventors
- 👤 Thomas Kazangey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:43
CPC Classifications
G; G01; G01C; G01C25/00; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; H; H03; H03M; H03M1/00; H03M1/10; H03M1/1071; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/30; H03M1/303; H03M1/305
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
75 words
Testing apparatus for an incremental shaft encoder comprising: a. a rotatable rate table supporting the incremental shaft encoder; b. a rate-integrating gyroscope mounted upon the rate table; c. a voltage-to-frequency converter fed by the gyroscope, the output being a series of pulses; d. means for counting the output pulses of the voltage-to-frequency converter, the counting means being activated and deactivated by the incremental shaft encoder output; and e. a printer fed by the counting means.
Claim 2
Dependent Claim
75 words
Testing apparatus for an incremental shaft encoder comprising: a. a rotatable rate table supporting the incremental shaft encoder; b. a rate-integrating gyroscope mounted upon the rate table; c. a voltage-to-frequency converter fed by the gyroscope, the output being a series of pulses; d. means for counting the output pulses of the voltage-to-frequency converter, the counting means being activated and deactivated by the incremental shaft encoder output; and e. a printer fed by the counting means.
Claim 3
Dependent Claim
39 words
Testing apparatus for an incremental shaft encoder according to claim 1 wherein the output of the incremental shaft encoder is a square wave and the voltage-to-frequency converter is activated and deactivated by successive leading edges of the square wave.
Claim 4
Dependent Claim
41 words
Testing apparatus for an incremental shaft encoder according to claim 2 wherein the gyroscope includes: a. a signal generator; and b. a DC torquer fed by the signal generator, the output of the DC torquer being fed to the voltage-to-frequency converter.
Claim 5
Dependent Claim
40 words
Testing apparatus for an incremental shaft encoder according to claim 3 wherein the gyroscope further includes: a. heaters; b. a temperature sensor; and c. means interposed between the heaters and the temperature sensor for controlling direct current to the heaters.
References Cited (Backward Citations)
US3355806A
Cited
US3583205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-21 | 1980-06-21 | 1980-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-21 | 1984-06-21 | 1984-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-21 | 1988-06-21 | 1988-12-21 | $7700.00 | Window Closed / Lapsed |