Patent US3105179A successfully refreshed from Google Patents.
US3105179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo system for magnetic tape machine
Assignee: Cook Electric Co
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Filing: 1960-08-22
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Granted: 1963-09-24
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Robert E Young
- 👤 Robert A Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/43; G11B15/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A MAGNETIC TAPE MACHINE, THE COMBINATION COMPRISING A CAPSTAN FOR ADVANCING THE TAPE, A REEL FOR TAKING UP THE TAPE, A DIRECT CURRENT MOTOR FOR DRIVING SAID REEL, A SWINGABLE ARM HAVING A TAPE GUIDE THEREON DISPOSED BETWEEN SAID CAPSTAN AND SAID REEL FOR RECEIVING THE TAPE, A SPRING BIASING SAID ARM IN ONE DIRECTION FOR TENSIONING THE TAPE, A SYNCHRO-TRANSMITTER CONNECTED TO SAID ARM AND HAVING MEANS FOR DEVELOPING AN ALTERNATING CURRENT SIGNAL WITH A NULL AT A PREDETERMINED POSITION OF SAID ARM, MEANS FOR ENERGIZING SAID SYNCHRO-TRANSMITTER WITH AN ALTERNATING CURRENT CARRIER, A DEMODULATOR CONNECTED TO THE OUTPUT OF SAID SYNCHRO-TRANSMITTER FOR PRODUCING DIRECT CURRENT SIGNALS OF OPPOSITE POLARITIES IN RESPONSE TO THE MOVEMENT OF SAID ARM TO OPPOSITE SIDES OF SAID PREDETERMINED POSITION OF SAID ARM, AN AMPLIFIER CONNECTED TO THE OUTPUT OF SAID DEMODULATOR AND HAVING
Claim 2
Dependent Claim
141 words
IN A MAGNETIC TAPE MACHINE, THE COMBINATION COMPRISING A CAPSTAN FOR ADVANCING THE TAPE, A REEL FOR TAKING UP THE TAPE, A DIRECT CURRENT MOTOR FOR DRIVING SAID REEL, A SWINGABLE ARM HAVING A TAPE GUIDE THEREON DISPOSED BETWEEN SAID CAPSTAN AND SAID REEL FOR RECEIVING THE TAPE, A SPRING BIASING SAID ARM IN ONE DIRECTION FOR TENSIONING THE TAPE, A SYNCHRO-TRANSMITTER CONNECTED TO SAID ARM AND HAVING MEANS FOR DEVELOPING AN ALTERNATING CURRENT SIGNAL WITH A NULL AT A PREDETERMINED POSITION OF SAID ARM, MEANS FOR ENERGIZING SAID SYNCHRO-TRANSMITTER WITH AN ALTERNATING CURRENT CARRIER, A DEMODULATOR CONNECTED TO THE OUTPUT OF SAID SYNCHRO-TRANSMITTER FOR PRODUCING DIRECT CURRENT SIGNALS OF OPPOSITE POLARITIES IN RESPONSE TO THE MOVEMENT OF SAID ARM TO OPPOSITE SIDES OF SAID PREDETERMINED POSITION OF SAID ARM, AN AMPLIFIER CONNECTED TO THE OUTPUT OF SAID DEMODULATOR AND HAVING
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |