US3345909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction sensor for laser gyro
Assignee: RTX Corp
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Filing: 1963-12-27
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Granted: 1967-10-10
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Expires: 1983-12-27
Abstract
No abstract record available.
Inventors
- 👤 Maria Anthony J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:24
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A ROTATION RATE AND DIRECTION SENSOR INCLUDING A MIRRORS SYSTEM HAVING A PLURALITY OF MIRRORS FIXED SPACED RELATION TO EACH OTHER, SAID MIRRORS BEING POSITIONED TO DEFINE A PATH OF LIGHT TRAVEL, AT LEAST ONE MEANS BETWEEN TWO OF SAID MIRRORS IN FIXED RELATION WITH SAID MIRRORS FOR GENERATING TWO COHERENT BEAMS OF LIGHT FOR TRAVEL ALONG SAID PATH IN OPPOSITE DIRECTIONS, SAID GENERATING MEANS AND SAID MIRROR SYSTEM BEING ROTATABLE AS A UNIT, MEANS FOR EXTRACTING SAID LIGHT BEAMS FROM SAID MIRROR SYSTEM, SAID EXTRACTED BEAMS, DIFFERING IN FREQUENCIES IN AN AMOUNT COMMENSURATE WITH THE RATE OF ROTATION OF SAID MIRROR SYSTEM, AN ULTRASONIC CELL IN THE PATH OF ONE OF SAID EXTRACTED BEAMS FOR IMPOSING A FREQUENCY BIAS ON SAID ONE EXTRACTED BEAM, AND MEANS FOR COMBINING SAID BIASED BEAM WITH THE OTHER OF SAID BEAMS TO OBTAIN A SIGNAL COMMENSURATE WITH SAID BIAS FREQUENCY AND SAID DIFFERENCE BETWEEN THE FREQUENCIES OF SAID EXTRACTED BEAMS, SAID SIGNAL BEING INDICATIVE OF THE RATE AND DIRECTION OF ROTATION OF SAID MIRROR SYSTEM.
Claim 2
Dependent Claim
172 words
A ROTATION RATE AND DIRECTION SENSOR INCLUDING A MIRRORS SYSTEM HAVING A PLURALITY OF MIRRORS FIXED SPACED RELATION TO EACH OTHER, SAID MIRRORS BEING POSITIONED TO DEFINE A PATH OF LIGHT TRAVEL, AT LEAST ONE MEANS BETWEEN TWO OF SAID MIRRORS IN FIXED RELATION WITH SAID MIRRORS FOR GENERATING TWO COHERENT BEAMS OF LIGHT FOR TRAVEL ALONG SAID PATH IN OPPOSITE DIRECTIONS, SAID GENERATING MEANS AND SAID MIRROR SYSTEM BEING ROTATABLE AS A UNIT, MEANS FOR EXTRACTING SAID LIGHT BEAMS FROM SAID MIRROR SYSTEM, SAID EXTRACTED BEAMS, DIFFERING IN FREQUENCIES IN AN AMOUNT COMMENSURATE WITH THE RATE OF ROTATION OF SAID MIRROR SYSTEM, AN ULTRASONIC CELL IN THE PATH OF ONE OF SAID EXTRACTED BEAMS FOR IMPOSING A FREQUENCY BIAS ON SAID ONE EXTRACTED BEAM, AND MEANS FOR COMBINING SAID BIASED BEAM WITH THE OTHER OF SAID BEAMS TO OBTAIN A SIGNAL COMMENSURATE WITH SAID BIAS FREQUENCY AND SAID DIFFERENCE BETWEEN THE FREQUENCIES OF SAID EXTRACTED BEAMS, SAID SIGNAL BEING INDICATIVE OF THE RATE AND DIRECTION OF ROTATION OF SAID MIRROR SYSTEM.
References Cited (Backward Citations)
US3011386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |