Patent US3443186A successfully refreshed from Google Patents.
US3443186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing motor drive for type bar
Assignee: International Business Machines Corp
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Filing: 1966-03-28
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Granted: 1969-05-06
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Expires: 1986-03-28
Abstract
No abstract record available.
Inventors
- 👤 C Van Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:16
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/04; H; H02; H02P; H02P7/00; H02P7/03; H02P7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A CONTROL CIRCUIT FOR A DIRECT CURRENT MOTOR COMPRISING: A CLOCK HAVING AN OSCILLATOR DRIVING A MULTISTAGE COUNTER OF BISTABLE DEVICES TO PRODUCE CLOSK PULSES, A SOURCE OF FEEDBACK PULSES HAVING A RATE DEPENDENT ON THE MOTOR SPEED, CIRCUIT MEANS INCLUDING A FIRST BISTABLE DEVICE HAVING ON AND OFF STATES OPERATIVE TO CONNECT THE MOTOR TO A SOURCE OF ELECTRICAL ENERGY TO DEVELOP FORWARD TORQUE IN THE MOTOR IN THE ON STATE, CIRCUIT MEANS INCLUDING A SECOND BISTABLE DEVICE HAVING ON AND OFF STATES OPERATIVE TO CONNECT THE MOTOR TO A SOURCE OF ELECTRICAL ENERGY TO DEVELOP REVERSE TORQUE IN SAID MOTOR IN THE ONE STATE, MEANS CONNECTING THE SPEED DEPENDENT PULSE SOURCE TO SAID FIRST BISTABLE DEVICE TO SWITCH SAID FIRST DEVICE TO THE OFF STATE, OTHER MEANS CONNECTING THE SPEED DEPENDENT PULSE SOURCE TO THE MULTISTAGE COUNTER SELECTIVELY OPERABLE TO RESET THE BISTABLE DEVICES OF SAID COUNTER TO DIFFERENT VALUES, MEANS CONNECTING THE COUNTER TO SAID SECOND BISTABLE DEVICE OPERATIVE TO SWITCH SAID SECOND DEVICE TO THE OFF STATE, CIRCUIT MEANS INTERCONNECTING THE FIRST AND SECOND BISTABLE DEVICES AND RESPECTIVELY CONNECTING THE FIRST AND SECOND BISTABLE DEVICES TO THE COUNTER AND TO THE SOURCE OF FEEDBACK PULSES OPERATIVE TO SWITCH THE FIRST AND SECOND BISTABLE DEVICES TO THE ON STATE.
Claim 2
Dependent Claim
212 words
A CONTROL CIRCUIT FOR A DIRECT CURRENT MOTOR COMPRISING: A CLOCK HAVING AN OSCILLATOR DRIVING A MULTISTAGE COUNTER OF BISTABLE DEVICES TO PRODUCE CLOSK PULSES, A SOURCE OF FEEDBACK PULSES HAVING A RATE DEPENDENT ON THE MOTOR SPEED, CIRCUIT MEANS INCLUDING A FIRST BISTABLE DEVICE HAVING ON AND OFF STATES OPERATIVE TO CONNECT THE MOTOR TO A SOURCE OF ELECTRICAL ENERGY TO DEVELOP FORWARD TORQUE IN THE MOTOR IN THE ON STATE, CIRCUIT MEANS INCLUDING A SECOND BISTABLE DEVICE HAVING ON AND OFF STATES OPERATIVE TO CONNECT THE MOTOR TO A SOURCE OF ELECTRICAL ENERGY TO DEVELOP REVERSE TORQUE IN SAID MOTOR IN THE ONE STATE, MEANS CONNECTING THE SPEED DEPENDENT PULSE SOURCE TO SAID FIRST BISTABLE DEVICE TO SWITCH SAID FIRST DEVICE TO THE OFF STATE, OTHER MEANS CONNECTING THE SPEED DEPENDENT PULSE SOURCE TO THE MULTISTAGE COUNTER SELECTIVELY OPERABLE TO RESET THE BISTABLE DEVICES OF SAID COUNTER TO DIFFERENT VALUES, MEANS CONNECTING THE COUNTER TO SAID SECOND BISTABLE DEVICE OPERATIVE TO SWITCH SAID SECOND DEVICE TO THE OFF STATE, CIRCUIT MEANS INTERCONNECTING THE FIRST AND SECOND BISTABLE DEVICES AND RESPECTIVELY CONNECTING THE FIRST AND SECOND BISTABLE DEVICES TO THE COUNTER AND TO THE SOURCE OF FEEDBACK PULSES OPERATIVE TO SWITCH THE FIRST AND SECOND BISTABLE DEVICES TO THE ON STATE.
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) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |