US3179864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque neutralizing system for servo systems
Assignee: RTX Corp
•
Filing: 1961-05-18
•
Granted: 1965-04-20
•
Expires: 1981-05-18
Abstract
No abstract record available.
Inventors
- 👤 Martin R Kramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:31
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A SERVO SYSTEM INCLUDING IN COMBINATION A SOURCE OF A TWO-PHASE INPUT SIGNAL, A FIRST RESOLVER HAVING TWOPHASE STATOR WINDINGS AND A ROTOR WINDING AND AN INPUT SHAFT, SAID FIRST RESOLVER BEING ADAPTED TO PRODUCE AN OUTPUT SIGNAL HAVING A PHASE DETERMINED BY THE ANGULAR POSITION OF SAID INPUT SHAFT, A SECOND RESOLVER HAVING TWO-PHASE STATOR WINDINGS AND A ROTOR WINDING AND AN INPUT SHAFT, SAID SECOND RESOLVER BEING ADAPTED TO PRODUCE AN OUTPUT SIGNAL HAVING A PHASE DETERMINED BY THE ANGULAR POSITION OF ITS INPUT SHAFT, MEANS FOR APPLYING THE SIGNAL FROM SAID SOURCE TO SAID FIRST AND SECOND RESOLVER STATOR WINDINGS TO PRODUCE A ROTATING FIELD IN SAID FIRST RESOLVER STATOR, MEANS RESPONSIVE TO SAID RESOLVER OUTPUT SIGNALS FOR PRODUCING AN ERROR SIGNAL AS A FUNCTION
Claim 2
Dependent Claim
128 words
A SERVO SYSTEM INCLUDING IN COMBINATION A SOURCE OF A TWO-PHASE INPUT SIGNAL, A FIRST RESOLVER HAVING TWOPHASE STATOR WINDINGS AND A ROTOR WINDING AND AN INPUT SHAFT, SAID FIRST RESOLVER BEING ADAPTED TO PRODUCE AN OUTPUT SIGNAL HAVING A PHASE DETERMINED BY THE ANGULAR POSITION OF SAID INPUT SHAFT, A SECOND RESOLVER HAVING TWO-PHASE STATOR WINDINGS AND A ROTOR WINDING AND AN INPUT SHAFT, SAID SECOND RESOLVER BEING ADAPTED TO PRODUCE AN OUTPUT SIGNAL HAVING A PHASE DETERMINED BY THE ANGULAR POSITION OF ITS INPUT SHAFT, MEANS FOR APPLYING THE SIGNAL FROM SAID SOURCE TO SAID FIRST AND SECOND RESOLVER STATOR WINDINGS TO PRODUCE A ROTATING FIELD IN SAID FIRST RESOLVER STATOR, MEANS RESPONSIVE TO SAID RESOLVER OUTPUT SIGNALS FOR PRODUCING AN ERROR SIGNAL AS A FUNCTION
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |