Patent US3264544A successfully refreshed from Google Patents.
US3264544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counter e. m. f. speed control
Assignee: General Electric Co
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Filing: 1962-06-08
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Granted: 1966-08-02
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Expires: 1982-06-08
Abstract
No abstract record available.
Inventors
- 👤 David L Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/295; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917; Y10S388/918; Y10S388/923; Y10S388/934; Y10T; Y10T137/00; Y10T137/6633
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A CONTROL ARRANGEMENT FOR A D.C. MOTOR POWERED BY A SOURCE OF FULL-WAVE RECTIFIED ALTERNATING CURRENT POTENTIAL AND INCLUDING AN ARMATURE, SAID ARRANGEMENT COMPRISING A GATE CONTROLLED RECTIFIER IN CIRCUIT WITH SAID SOURCE AND SAID ARMATURE, TIMING MEANS IN CIRCUIT WITH SAID RECTIFIER AND SAID ARMATURE FOR PERIODICALLY GATING SAID RECTIFIER INTO CONDUCTIVITY, SAID TIMING MEANS INCLUDING TIME CONSTANT MEANS COMPRISING AN RC COMBINATION IN CIRCUIT WITH SAID SOURCE AND SAID ARMATURE AND FURTHER INCLUDING A UNIJUNCTION TRANSISTOR IN CIRCUIT WITH SAID RC COMBINATION AND SAID GATE CONTROLLED RECTIFIER, AND REGULATING MEANS IN CIRCUIT WITH SAID TIMING MEANS AND SAID ARMATURE, SAID PERIODS BEING DETERMINED BY SAID REGULATING MEANS.
Claim 2
Dependent Claim
109 words
A CONTROL ARRANGEMENT FOR A D.C. MOTOR POWERED BY A SOURCE OF FULL-WAVE RECTIFIED ALTERNATING CURRENT POTENTIAL AND INCLUDING AN ARMATURE, SAID ARRANGEMENT COMPRISING A GATE CONTROLLED RECTIFIER IN CIRCUIT WITH SAID SOURCE AND SAID ARMATURE, TIMING MEANS IN CIRCUIT WITH SAID RECTIFIER AND SAID ARMATURE FOR PERIODICALLY GATING SAID RECTIFIER INTO CONDUCTIVITY, SAID TIMING MEANS INCLUDING TIME CONSTANT MEANS COMPRISING AN RC COMBINATION IN CIRCUIT WITH SAID SOURCE AND SAID ARMATURE AND FURTHER INCLUDING A UNIJUNCTION TRANSISTOR IN CIRCUIT WITH SAID RC COMBINATION AND SAID GATE CONTROLLED RECTIFIER, AND REGULATING MEANS IN CIRCUIT WITH SAID TIMING MEANS AND SAID ARMATURE, SAID PERIODS BEING DETERMINED BY SAID REGULATING MEANS.
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |