US3193219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flight control systems
Assignee: Unisys Corp
•
Filing: 1961-11-01
•
Granted: 1965-07-06
•
Expires: 1981-11-01
Abstract
No abstract record available.
Inventors
- 👤 Robert H Parker
- 👤 William A Rorison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:05
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0816
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
APPARATUS FOR AUTOMATICALLY TRIMMING AN AIRCRAFT CONTROL SURFACE HAVING A MOVABLE TRIM MEMBER, SAID SURFACE BEING OPERATED IN RESPONSE TO A CONTROL SIGNAL FROM A FLIGHT CONTROL SYSTEM COMPRISING AN ELECTRIC CONTROL SURFACE MOTOR HAVING A FIELD WINDING AND AN ARMATURE WINDING, AN ELECTRIC TRIM MOTOR HAVING A FIELD WINDING AND AN ARMATURE WINDING AND BEING ADAPTED TO DRIVE SAID TRIM MEMBER, ONE OF SAID CONTROL SURFACE MOTOR WINDINGS BEING SERIALLY CONNECTED WITH ONE OF SAID TRIM MOTOR WINDINGS, THE SERIES CONNECTION OF WINDINGS BEING EXCITED BY SAID CONTROL SIGNAL, MEANS EXCITING THE OTHER OF SAID CONTROL SURFACE MOTOR WINDINGS, AND MEANS ALSO RECEIVING SAID CONTROL SIGNAL RESPONSIVE WHEN SAID CONTROL SIGNAL HAS A CERTAIN MAGNITUDE TO EXCITE THE OTHER OF SAID TRIM MOTOR WINDINGS.
Claim 2
Dependent Claim
125 words
APPARATUS FOR AUTOMATICALLY TRIMMING AN AIRCRAFT CONTROL SURFACE HAVING A MOVABLE TRIM MEMBER, SAID SURFACE BEING OPERATED IN RESPONSE TO A CONTROL SIGNAL FROM A FLIGHT CONTROL SYSTEM COMPRISING AN ELECTRIC CONTROL SURFACE MOTOR HAVING A FIELD WINDING AND AN ARMATURE WINDING, AN ELECTRIC TRIM MOTOR HAVING A FIELD WINDING AND AN ARMATURE WINDING AND BEING ADAPTED TO DRIVE SAID TRIM MEMBER, ONE OF SAID CONTROL SURFACE MOTOR WINDINGS BEING SERIALLY CONNECTED WITH ONE OF SAID TRIM MOTOR WINDINGS, THE SERIES CONNECTION OF WINDINGS BEING EXCITED BY SAID CONTROL SIGNAL, MEANS EXCITING THE OTHER OF SAID CONTROL SURFACE MOTOR WINDINGS, AND MEANS ALSO RECEIVING SAID CONTROL SIGNAL RESPONSIVE WHEN SAID CONTROL SIGNAL HAS A CERTAIN MAGNITUDE TO EXCITE THE OTHER OF SAID TRIM MOTOR WINDINGS.
References Cited (Backward Citations)
US2988306A
Cited
US2957652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |