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Patent US3722295A successfully refreshed from Google Patents.
US3722295A
Expired / Lapsed
US
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Multiple rotation gyroscope with hydrodynamic suspension
Assignee: Unisys Corp
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Filing: 1970-12-02
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Granted: 1973-03-27
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Expires: 1990-12-02
Abstract
Abstract A gyroscopic device having an inertial element that is hydrodynamically suspended within a centralized cavity of a gimbal rotating simultaneously about two mutually perpendicular axes in which the moment of inertia and angular velocity about the first axis is greater than the moment of inertia and angular velocity about the second axis. Synchronously applied decentralizing forces acting on the inertial element are resisted by additional bearing surfaces that combine with the component of rotation having the smaller angular velocity to increase the restoring force on the inertial element in the direction of the decentralizing forces thereby maintaining the inertial element centered within the gimbal.
Inventors
- 👤 W Passarelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:20
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/20; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1282
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
A GYROSCOPIC APPARATUS COMPRISING AN INERTIAL ELEMENT HAVING FIRST AND SECOND MUTUALLY PERPENDICULAR AXES OF INERTIAL SYMMETRY, SAID INERTIAL ELEMENT SIMULTANEOUSLY ROTATING ABOUT SAID FIRST AND SECOND AXES AND HAVING A MOMENT OF INERTIA AND ANGULAR VELOCITY COMPONENT ABOUT SAID FIRST AXIS WHICH IS GREATER THAN ITS MOMENT OF INERTIA AND ANGULAR VELOCITY COMPONENT ABOUT SAID SECOND AXIS, GIMBAL MEANS FOR ROTATING ABOUT SAID FIRST AXIS IN SYNCHRONISM WITH SAID INERTIAL ELEMENT INCLUDING AN INTERNAL CAVITY ENCLOSING SAID INERTIAL ELEMENT, FIRST AND SECOND FLUID BEARING MEANS DISPOSED BETWEEN SAID GIMBAL MEANS AND SAID INERTIAL ELEMENT FOR HYDRODYNAMICALLY SUSPENDING SAID INERTIAL ELEMENT IN A CENTERED POSITION ALONG SAID FIRST AND SECOND AXES WITHIN SAID CAVITY, MEANS MOUNTED IN SAID GIMBAL MEANS FOR PROVIDING SYNCHRONOUS FORCES WHICH ACT ON SAID INERTIAL ELEMENT AND SPIN IN SYNCHRONISM WITH SAID INERTIAL ELEMENT AND SAID GIMBAL MEANS AS THEY ROTATE ABOUT SAID FIRST AXIS, AND THIRD FLUID BEARING MEANS DISPOSED BETWEEN SAID GIMBAL MEANS AND SAID INERTIAL ELEMENT FOR PROVIDING RESTORING FORCES WHICH COMPENSATE UNBALANCED CONDITIONS IN SAID SYNCHRONOUS FORCES THAT DECENTER SAID INERTIAL ELEMENT ALONG SAID SECOND AXIS WHEREBY SAID RESTORING FORCES TRANSLATE SAID INERTIAL ELEMENT ALONG SAID SECOND AXIS TO RESTORE IT TO A CENTERED POSITION WITHIN SAID CAVITY.
Claim 2
Dependent Claim
206 words
A GYROSCOPIC APPARATUS COMPRISING AN INERTIAL ELEMENT HAVING FIRST AND SECOND MUTUALLY PERPENDICULAR AXES OF INERTIAL SYMMETRY, SAID INERTIAL ELEMENT SIMULTANEOUSLY ROTATING ABOUT SAID FIRST AND SECOND AXES AND HAVING A MOMENT OF INERTIA AND ANGULAR VELOCITY COMPONENT ABOUT SAID FIRST AXIS WHICH IS GREATER THAN ITS MOMENT OF INERTIA AND ANGULAR VELOCITY COMPONENT ABOUT SAID SECOND AXIS, GIMBAL MEANS FOR ROTATING ABOUT SAID FIRST AXIS IN SYNCHRONISM WITH SAID INERTIAL ELEMENT INCLUDING AN INTERNAL CAVITY ENCLOSING SAID INERTIAL ELEMENT, FIRST AND SECOND FLUID BEARING MEANS DISPOSED BETWEEN SAID GIMBAL MEANS AND SAID INERTIAL ELEMENT FOR HYDRODYNAMICALLY SUSPENDING SAID INERTIAL ELEMENT IN A CENTERED POSITION ALONG SAID FIRST AND SECOND AXES WITHIN SAID CAVITY, MEANS MOUNTED IN SAID GIMBAL MEANS FOR PROVIDING SYNCHRONOUS FORCES WHICH ACT ON SAID INERTIAL ELEMENT AND SPIN IN SYNCHRONISM WITH SAID INERTIAL ELEMENT AND SAID GIMBAL MEANS AS THEY ROTATE ABOUT SAID FIRST AXIS, AND THIRD FLUID BEARING MEANS DISPOSED BETWEEN SAID GIMBAL MEANS AND SAID INERTIAL ELEMENT FOR PROVIDING RESTORING FORCES WHICH COMPENSATE UNBALANCED CONDITIONS IN SAID SYNCHRONOUS FORCES THAT DECENTER SAID INERTIAL ELEMENT ALONG SAID SECOND AXIS WHEREBY SAID RESTORING FORCES TRANSLATE SAID INERTIAL ELEMENT ALONG SAID SECOND AXIS TO RESTORE IT TO A CENTERED POSITION WITHIN SAID CAVITY.
Claim 3
Dependent Claim
94 words
A gyroscopic apparatus as defined in claim 1 in which said first and second fluid bearing means include a relatively viscous fluid disposed between the internal surfaces of said cavity and the external surfaces of said inertial element which co-acts with these surfaces in response to said simultaneous rotation of said inertial element about first and second axes, and said third fluid bearing means includes additional surfaces between said internal surfaces of said cavity and said external surfaces of said inertial element which co-act with said relatively viscous fluid to provide said restoring forces.
Claim 4
Dependent Claim
38 words
A gyroscopic apparatus as defined in claim 2 in which said third fluid bearing means includes surface features profiled on the surface of said inertial element in the region of the poles of said second axis of rotation.
Claim 5
Dependent Claim
40 words
A gyroscopic apparatus as defined in claim 2 in which said third fluid bearing means includes surface features profiled on the walls of said cavity of said gimbal in the region of the poles of said second axis of rotation.
Claim 6
Dependent Claim
38 words
A gyroscopic apparatus as defined in claim 2 in which said third fluid bearing means includes spiral grooves profiled on the surface of said inertial element in the region of the poles of said second axis of rotation.
Claim 7
Dependent Claim
40 words
A gyroscopic apparatus as defined in claim 2 in which said third fluid bearing means includes spiral grooves profiled on the walls of said cavity of said gimbal in the region of the poles of said second axis of rotation.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |