US3239742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full wave, plural condition d.c. motor control system
Assignee: Schneider Electric USA Inc
•
Filing: 1963-04-02
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Granted: 1966-03-08
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Expires: 1983-04-02
Abstract
No abstract record available.
Inventors
- 👤 Robert E Mierendorf
- 👤 Clarence W Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:22
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917; Y10S388/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR, THE COMBINATION COMPRISING; AN ALTERNATING CURRENT SOURCE, A FULL WAVE BRIDGE RECTIFIER CONNECTED BETWEEN THE SOURCE AND MOTOR FOR SUPPLYING THE MOTOR WITH RECTIFIED DIRECT CURRENT, SAID RECTIFIER HAVING AT LEAST TWO LEGS WITH EACH OF SAID LEGS INCLUDING; A SILICON CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE ELECTRODE, A UNIDIRECTIONAL CONDUCTING DIODE HAVING A CATHODE CONNECTED TO THE ANODE OF THE SILICON CONTROLLED RECTIFIER AND A SECOND UNIDIRECTIONAL CONDUCTING DIODE HAVING AN
Claim 2
Dependent Claim
85 words
IN A CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR, THE COMBINATION COMPRISING; AN ALTERNATING CURRENT SOURCE, A FULL WAVE BRIDGE RECTIFIER CONNECTED BETWEEN THE SOURCE AND MOTOR FOR SUPPLYING THE MOTOR WITH RECTIFIED DIRECT CURRENT, SAID RECTIFIER HAVING AT LEAST TWO LEGS WITH EACH OF SAID LEGS INCLUDING; A SILICON CONTROLLED RECTIFIER HAVING AN ANODE, A CATHODE AND A GATE ELECTRODE, A UNIDIRECTIONAL CONDUCTING DIODE HAVING A CATHODE CONNECTED TO THE ANODE OF THE SILICON CONTROLLED RECTIFIER AND A SECOND UNIDIRECTIONAL CONDUCTING DIODE HAVING AN
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |