US3073547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller control system
Assignee: RTX Corp
•
Filing: 1961-05-04
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Granted: 1963-01-15
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Expires: 1981-05-04
Abstract
No abstract record available.
Inventors
- 👤 Richard L Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:23
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/40; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN COMBINATION WITH A PLURALITY OF CONTROLLABLE PITCH PROPELLERS INTERCONNECTED FOR ROTATION AT A FIXED SPEED RATIO, EACH HAVING PITCH CHANGING MECHANISM, MEANS INTERCONNECTING SAID PITCH CHANGING MECHANISMS FOR SIMULTANEOUS AND EQUAL PITCH CHANGING MOVEMENT OF ALL SAID PROPELLERS, A MASTER CONTROL COMPRISING A FIRST SPEED RESPONSIVE GOVERNOR DRIVEN IN TIMED RELATION TO ALL SAID PROPELLERS, A MOTOR HAVING A CONNECTION WITH AND CONTROLLED BY SAID GOVERNOR AND OPERATIVELY CONNECTED WITH SAID INTERCONNECTING MEANS, A SECOND SPEED RESPONSIVE GOVERNOR DRIVEN IN TIMED RELATION TO ALL SAID PROPELLERS AT THE SAME SPEED AS SAID FIRST GOVERNOR, A SECOND MOTOR HAVING A CONNECTION WITH AND CONTROLLED BY SAID SECOND GOVERNOR AND OPERATIVELY CONNECTED WITH SAID INTERCONNECTING MEANS, SELECTOR MECHANISM IN THE CONNECTION BETWEEN EACH GOVERNOR AND ITS RESPECTIVE MOTOR, AND MEANS FOR ACTUATING SAID SELECTOR MECHANISM TO SELECTIVELY DISABLE ONE MOTOR AND ACTIVATE THE OTHER MOTOR TO CONTROL THE PITCH OF ALL SAID PROPELLERS.
Claim 2
Dependent Claim
152 words
IN COMBINATION WITH A PLURALITY OF CONTROLLABLE PITCH PROPELLERS INTERCONNECTED FOR ROTATION AT A FIXED SPEED RATIO, EACH HAVING PITCH CHANGING MECHANISM, MEANS INTERCONNECTING SAID PITCH CHANGING MECHANISMS FOR SIMULTANEOUS AND EQUAL PITCH CHANGING MOVEMENT OF ALL SAID PROPELLERS, A MASTER CONTROL COMPRISING A FIRST SPEED RESPONSIVE GOVERNOR DRIVEN IN TIMED RELATION TO ALL SAID PROPELLERS, A MOTOR HAVING A CONNECTION WITH AND CONTROLLED BY SAID GOVERNOR AND OPERATIVELY CONNECTED WITH SAID INTERCONNECTING MEANS, A SECOND SPEED RESPONSIVE GOVERNOR DRIVEN IN TIMED RELATION TO ALL SAID PROPELLERS AT THE SAME SPEED AS SAID FIRST GOVERNOR, A SECOND MOTOR HAVING A CONNECTION WITH AND CONTROLLED BY SAID SECOND GOVERNOR AND OPERATIVELY CONNECTED WITH SAID INTERCONNECTING MEANS, SELECTOR MECHANISM IN THE CONNECTION BETWEEN EACH GOVERNOR AND ITS RESPECTIVE MOTOR, AND MEANS FOR ACTUATING SAID SELECTOR MECHANISM TO SELECTIVELY DISABLE ONE MOTOR AND ACTIVATE THE OTHER MOTOR TO CONTROL THE PITCH OF ALL SAID PROPELLERS.
References Cited (Backward Citations)
US2327370A
Cited
US2337571A
Cited
US2284902A
Cited
US2350066A
Cited
US2613072A
Cited
US2612960A
Cited
US2513660A
Cited
US3011832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |