US3130591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic motors
Assignee: De Havilland Aircraft Co Ltd
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Filing: 1960-09-19
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Granted: 1964-04-28
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Richard R Paddick
- 👤 Brian T H Quarm
- 👤 Anthony W Hiscocks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:28
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/14; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
GYROSCOPIC APPARATUS COMPRISING A GYROSCOPIC ROTOR, AN INNER FRAME MEMBER IN WHICH THE ROTOR IS MOUNTED FOR ROTATION ABOUT A ROTOR AXIS A GIMBAL FRAME MEMBER IN WHICH THE INNER FRAME MEMBER IS MOUNTED FOR ANGULAR MOVEMENT ABOUT A FIRST AXIS NORMAL TO SAID ROTOR AXIS, AN OUTER FRAME MEMBER IN WHICH THE GIMBAL FRAME MEMBER IS MOUNTED FOR ANGULAR MOVEMENT ABOUT A SECOND AXIS NORMAL TO SAID FIRST AXIS AND TRANSVERSE TO SAID ROTOR AXIS, A MAGNETIC-CIRCIT STRUCTURE CARRIED BY SAID OUTER FRAME MEMBER AND HAVING THREE LIMBS EXTENDING IN THE DIRECTION OF RELATIVE MOVEMENT WITH SUBSTANTIALLY PLANAR PARALLEL POLE FACES DEFINING THEREBETWEEN TWO AIR-GAPS IN WHICH ARE UNIFORM AND UNIDIRECTIONAL MAGNETIC FIELDS, AND TWO COILS CARRIED BY SAID GIMBAL FRAME MEMBER AND INCLUDING FORCE GENERATING CONDUCTOR ELEMENTS WHICH EXTEND ACROSS THE FLUX PATH IN THE FIELDS AND ARE RELATIVELY MOVABLE, UPON RELATIVE MOVEMENT OF THE OUTER AND GIMBAL FRAME MEMBERS, IN A PLANE PARALLEL TO AND BETWEEN THE FACES OF THE MAGNETIC-CIRCUIT STRUCTURE.
Claim 2
Dependent Claim
165 words
GYROSCOPIC APPARATUS COMPRISING A GYROSCOPIC ROTOR, AN INNER FRAME MEMBER IN WHICH THE ROTOR IS MOUNTED FOR ROTATION ABOUT A ROTOR AXIS A GIMBAL FRAME MEMBER IN WHICH THE INNER FRAME MEMBER IS MOUNTED FOR ANGULAR MOVEMENT ABOUT A FIRST AXIS NORMAL TO SAID ROTOR AXIS, AN OUTER FRAME MEMBER IN WHICH THE GIMBAL FRAME MEMBER IS MOUNTED FOR ANGULAR MOVEMENT ABOUT A SECOND AXIS NORMAL TO SAID FIRST AXIS AND TRANSVERSE TO SAID ROTOR AXIS, A MAGNETIC-CIRCIT STRUCTURE CARRIED BY SAID OUTER FRAME MEMBER AND HAVING THREE LIMBS EXTENDING IN THE DIRECTION OF RELATIVE MOVEMENT WITH SUBSTANTIALLY PLANAR PARALLEL POLE FACES DEFINING THEREBETWEEN TWO AIR-GAPS IN WHICH ARE UNIFORM AND UNIDIRECTIONAL MAGNETIC FIELDS, AND TWO COILS CARRIED BY SAID GIMBAL FRAME MEMBER AND INCLUDING FORCE GENERATING CONDUCTOR ELEMENTS WHICH EXTEND ACROSS THE FLUX PATH IN THE FIELDS AND ARE RELATIVELY MOVABLE, UPON RELATIVE MOVEMENT OF THE OUTER AND GIMBAL FRAME MEMBERS, IN A PLANE PARALLEL TO AND BETWEEN THE FACES OF THE MAGNETIC-CIRCUIT STRUCTURE.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |