Patent US2017747A successfully refreshed from Google Patents.
Patent US3404571A successfully refreshed from Google Patents.
US3404571A
Expired / Lapsed
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Inertial guidance system
Assignee: Bell Aerospace Corp
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Filing: 1963-12-20
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Granted: 1968-10-08
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 Helmut W E Schlitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:56
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/183; G01C21/188; G01C21/166; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
IN AN INERTIAL NAVIGATION SYSTEM, A CONTROL GYRO HAVING A ROTOR, A PLATFORM SLAVED TO SAID CONTROL GYRO, TORQUER MEANS COUPLED TO SAID CONTROL GYRO FOR OPPOSING THE EFFECT OF DRIFT TORQUE WHICH MAY BE ACTING UPON SAID CONTROL GYRO TO IMPART PRECESSION TO SAID PLATFORM, MEANS FOR PERIODICALLY VARYING THE ANGULAR MOMENTUM OF THE ROTOR OF SAID CONTROL GYRO, A REFERENCE GYRO MOUNTED ON SAID PLATFORM, SAID REFERENCE GYRO HAVING A ROTOR AND HAVING TORQUER MEANS AND PICK-OFF MEANS COUPLED THERETO, MEANS FOR DRIVING THE ROTOR OF SAID REFERENCE GYRO AT CONSTANT ANGULAR VELOCITY, AMPLIFIER MEANS CONNECTED BETWEEN SAID PICK-OFF MEANS AND SAID TORQUER MEANS OF THE REFERENCE GYRO TO SLAVE SAID REFERENCE GYRO IN THE AVERAGE TO THE ORIENTATION OF SAID CONTROL GYRO, PROCESSING CIRCUIT MEANS CONNECTED BETWEEN SAID PICKOFF MEANS AND THE TORQUER MEANS OF SAID CONTROL GYRO TO COMPENSATE DRIFT TORQUE WHICH MAY BE ACTING ON SAID CONTORL GYRO, AND FEEDBACK MEANS CONNECTED BETWEEN THE OUTPUT OF SAID PROCESSING CIRCUIT MEANS AND THE TORQUER MEANS OF SAID REFERENCE GYRO AND OPERATING ON SUCH TORQUER MEANS IN A SENSE OPPOSITE TO THAT OF SAID AMPLIFIER MEANS.
Claim 2
Dependent Claim
189 words
IN AN INERTIAL NAVIGATION SYSTEM, A CONTROL GYRO HAVING A ROTOR, A PLATFORM SLAVED TO SAID CONTROL GYRO, TORQUER MEANS COUPLED TO SAID CONTROL GYRO FOR OPPOSING THE EFFECT OF DRIFT TORQUE WHICH MAY BE ACTING UPON SAID CONTROL GYRO TO IMPART PRECESSION TO SAID PLATFORM, MEANS FOR PERIODICALLY VARYING THE ANGULAR MOMENTUM OF THE ROTOR OF SAID CONTROL GYRO, A REFERENCE GYRO MOUNTED ON SAID PLATFORM, SAID REFERENCE GYRO HAVING A ROTOR AND HAVING TORQUER MEANS AND PICK-OFF MEANS COUPLED THERETO, MEANS FOR DRIVING THE ROTOR OF SAID REFERENCE GYRO AT CONSTANT ANGULAR VELOCITY, AMPLIFIER MEANS CONNECTED BETWEEN SAID PICK-OFF MEANS AND SAID TORQUER MEANS OF THE REFERENCE GYRO TO SLAVE SAID REFERENCE GYRO IN THE AVERAGE TO THE ORIENTATION OF SAID CONTROL GYRO, PROCESSING CIRCUIT MEANS CONNECTED BETWEEN SAID PICKOFF MEANS AND THE TORQUER MEANS OF SAID CONTROL GYRO TO COMPENSATE DRIFT TORQUE WHICH MAY BE ACTING ON SAID CONTORL GYRO, AND FEEDBACK MEANS CONNECTED BETWEEN THE OUTPUT OF SAID PROCESSING CIRCUIT MEANS AND THE TORQUER MEANS OF SAID REFERENCE GYRO AND OPERATING ON SUCH TORQUER MEANS IN A SENSE OPPOSITE TO THAT OF SAID AMPLIFIER MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |