Patent US2194666A successfully refreshed from Google Patents.
Patent US3153240A successfully refreshed from Google Patents.
US3153240A
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Tape recording typewriters
Assignee: Unisys Corp
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Filing: 1959-04-09
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Granted: 1964-10-13
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Expires: 1979-04-09
Abstract
No abstract record available.
Inventors
- 👤 Walter Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:09
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B15/00; G11B15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A KEY SET POWER OPERATED TYPEWRITER FOR MAGNETICALLY RECORDING DATA ON A TAPE INCLUDING MOTOR MEANS, CARRIAGE RETURN MEANS CONTROLLED BY THE OPERATION OF SAID MOTOR MEANS, ERASING MEANS, AND AN ERASE KEY MEANS FOR CONTROLLING RETURN OF THE CARRIAGE AND OPERATION OF THE ERASING MEANS FOR ERASING DATA RECORDED ON THE TAPE AS THE CARRIAGE IS RETURNED BY SAID MOTOR MEANS, A MOTOR CONTROL SWITCH MOVABLE TO "OFF" AND "ON" POSITIONS AND AN ERASE KEY PRESENTING AN ARM, THE INVENTION WHICH COMPRISES A LINKAGE EXTENDING BETWEEN THE SWITCH AND THE ARM AND OPERABLE TO DEPRESS THE ARM WHEN THE SWITCH IS MOVED TO "OFF" POSITION TO CONDITION SAID MOTOR MEANS FOR CARRIAGE RETURN AND THE ERASING MEANS FOR DATA ERASURE WHEN THE SWITCH IS SUBSEQUENTLY MOVED TO "ON" POSITION.
Claim 2
Dependent Claim
131 words
IN A KEY SET POWER OPERATED TYPEWRITER FOR MAGNETICALLY RECORDING DATA ON A TAPE INCLUDING MOTOR MEANS, CARRIAGE RETURN MEANS CONTROLLED BY THE OPERATION OF SAID MOTOR MEANS, ERASING MEANS, AND AN ERASE KEY MEANS FOR CONTROLLING RETURN OF THE CARRIAGE AND OPERATION OF THE ERASING MEANS FOR ERASING DATA RECORDED ON THE TAPE AS THE CARRIAGE IS RETURNED BY SAID MOTOR MEANS, A MOTOR CONTROL SWITCH MOVABLE TO "OFF" AND "ON" POSITIONS AND AN ERASE KEY PRESENTING AN ARM, THE INVENTION WHICH COMPRISES A LINKAGE EXTENDING BETWEEN THE SWITCH AND THE ARM AND OPERABLE TO DEPRESS THE ARM WHEN THE SWITCH IS MOVED TO "OFF" POSITION TO CONDITION SAID MOTOR MEANS FOR CARRIAGE RETURN AND THE ERASING MEANS FOR DATA ERASURE WHEN THE SWITCH IS SUBSEQUENTLY MOVED TO "ON" POSITION.
References Cited (Backward Citations)
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US2157053A
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US2874369A
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US2757777A
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US2975239A
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US2810466A
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US2971809A
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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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |