US3127774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means and method for determining the direction of the axis of rotation of a controllably rotating platform
Assignee: North American Aviation Corp
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Filing: 1961-11-08
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Granted: 1964-04-07
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Expires: 1981-11-08
Abstract
No abstract record available.
Inventors
- 👤 John J Fischer
- 👤 Frank M Pelteson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/42; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR DETERMINING THE COMPONENTS OF ANGULAR VELOCITY OF DRIFT OF A PLATFORM EXPRESSED IN A CARTESIA SET OF COORDINATES FIXED RELATIVE TO SAID PLATFORM, SAID PLATFORM HAVING ACCELEROMETER MEANS POSITIONED THEREON WITH THREE SENSITIVE AXES ALIGNED WITH SAID CARTESIAN AXES COMPRISING THE STEPS OF: ALIGNING A FIRST ONE OF SAID AXES IN A NORTH-SOUTH AND INITIALLY LOCALLY LEVEL WITH RESPECT TO GRAVITY DIRECTION; ALIGNING A SECOND ONE OF SAID AXES IN AN EAST-WEST AND INITIALLY LOCALLY LEVEL WITH RESPECT TO GRAVITY DIRECTION; RELEASING SAID PLATFORM TO ALLOW IT TO DRIFT; MEASURING AND COMPUTING THE ANGULAR VELOCITY OF SAID PLATFORM ABOUT ITS NORTH-SOUTH ORIENTED AXIS; SUBTRACTING THE KNOW COMPONENT OF ROTATION OF SAID PLATFORM DUE TO EARTH''S ROTATION TO DETERMINE THE ANGULAR VELOCITY OF DRIFT OF SAID PLATFORM ABOUT ITS NORTH-SOUTH ORIENTED AXIS; REALIGNING SAID FIRST NORTH-SOUTH ORIENTED AXIS INTO AN EASTWEST AND INITIALLY LOCALLY LEVEL WITH RESPECT TO GRAVITY
Claim 2
Dependent Claim
151 words
A PROCESS FOR DETERMINING THE COMPONENTS OF ANGULAR VELOCITY OF DRIFT OF A PLATFORM EXPRESSED IN A CARTESIA SET OF COORDINATES FIXED RELATIVE TO SAID PLATFORM, SAID PLATFORM HAVING ACCELEROMETER MEANS POSITIONED THEREON WITH THREE SENSITIVE AXES ALIGNED WITH SAID CARTESIAN AXES COMPRISING THE STEPS OF: ALIGNING A FIRST ONE OF SAID AXES IN A NORTH-SOUTH AND INITIALLY LOCALLY LEVEL WITH RESPECT TO GRAVITY DIRECTION; ALIGNING A SECOND ONE OF SAID AXES IN AN EAST-WEST AND INITIALLY LOCALLY LEVEL WITH RESPECT TO GRAVITY DIRECTION; RELEASING SAID PLATFORM TO ALLOW IT TO DRIFT; MEASURING AND COMPUTING THE ANGULAR VELOCITY OF SAID PLATFORM ABOUT ITS NORTH-SOUTH ORIENTED AXIS; SUBTRACTING THE KNOW COMPONENT OF ROTATION OF SAID PLATFORM DUE TO EARTH''S ROTATION TO DETERMINE THE ANGULAR VELOCITY OF DRIFT OF SAID PLATFORM ABOUT ITS NORTH-SOUTH ORIENTED AXIS; REALIGNING SAID FIRST NORTH-SOUTH ORIENTED AXIS INTO AN EASTWEST AND INITIALLY LOCALLY LEVEL WITH RESPECT TO GRAVITY
References Cited (Backward Citations)
US2936627A
Cited
US2955474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |