Patent US3156912A successfully refreshed from Google Patents.
US3156912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical system
Assignee: International Business Machines Corp
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Filing: 1960-12-27
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Granted: 1964-11-10
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 William R Maclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:43
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
207 words
AN ANALOG-TO-DIGITAL CONVERTER COMPRISING; AN INPUT SHAFT HAVING AN INSTANTANEOUS ANGULAR POSITION WHICH IT IS DESIRED TO CONVERT TO AN ELECTRICAL DIGITAL OUTPUT SIGNAL; A FIRST SYNCHRO TRANSMITTER HAVING A ROTOR AND AN ELECTRICAL OUTPUT; SAID ROTOR OF SAID FIRST SYNCHRO TRANSMITTER BEING CONNECTED TO BE POSITIONED IN ACCORDANCE WITH SAID INPUT SHAFT; A GEAR SPEED CHANGING MEANS; A SECOND SYNCHRO TRANSMITTER HAVING A ROTOR AND AN ELECTRICAL OUTPUT; SAID ROTOR OF SAID SECOND SYNCHRO TRANSMITTER BEING CONNECTED TO BE POSITIONED IN ACCORDANCE WITH SAID INPUT SHAFT THROUGH SAID GEAR SPEED CHANGING MEANS; A FIRST SYNCHRO RECEIVER HAVING A ROTOR AND ELECTRICAL INPUT AND ELECTRICAL OUTPUT CONNECTED TO RECEIVE AN ELECTRICAL INPUT FROM SAID FIRST SYNCHRO TRANSMITTER; A SECOND SYNCHRO RECEIVER HAVING A ROTOR AND AN ELECTRICAL INPUT AND OUTPUT CONNECTED TO RECEIVE AN ELECTRICAL INPUT FROM SAID SECOND SYNCHRO TRANSMITTER; SAID SYNCHRO TRANSMITTERS AND SAID SYNCHRO RECEIVERS BEING PHYSICALLY POSITIONED REMOTELY FROM ONE ANOTHER; A FIRST OUTPUT SHAFT ASSOCIATED WITH SAID FIRST SYNCHRO RECEIVER; THE ROTOR AND ELECTRICAL OUTPUT OF SAID FIRST SYNCHRO RECEIVER BEING CONNECTED WITH SAID FIRST OUTPUT SHAFT THROUGH A POSITION SERVO FOLLOW-UP LOOP; A SECOND OUTPUT SHAFT ASSOCIATED WITH SAID SECOND SYNCHRO RECEIVER; THE ROTOR AND ELECTRICAL OUTPUT OF SAID SECOND SYNCHRO
References Cited (Backward Citations)
US2980900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |