US3330998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled rectifier control means
Assignee: Allis Chalmers Corp
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Filing: 1964-07-31
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Granted: 1967-07-11
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Winograd Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:15
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/084; H02M1/02; H02M1/04; H02M1/042; H02M1/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
A SYSTEM FOR CONTROLLING CURRENT BETWEEN A POLYPHASE POWER SOURCE AND A LOAD TO PROVIDE RECTIFICATION AND INVERSION OF THE SOURCE COMPRISING: MEANS FOR PRODUCING AN ALTERNATING CONTROL SIGNAL HAVING A PREDETERMINED PHASE RELATIONSHIP TO A PHASE OF THE SOURCE; CONTROLLED SWITCHING MEANS RESPONSIVE TO A PREDETERMINED POLARITY CHANGE OF A CONTROL SIGNAL CONNECTED BETWEEN THE SOURCE AND THE LOAD TO CONTROL THE PHASE OF THE SOURCE; MEANS CONNECTED TO BE COMBINED WITH THE CONTROL SIGNAL FOR VARIABLY BIASING THE CONTROL SIGNAL IN RESPONSE TO A PREDETERMINED OPERATING CONDITION, SAID MEANS COMPRISING A FIXED BIAS PROVIDING A POLARITY CHANGE TO TURN ON THE SWITCHING MEANS TO EFFECT INVERSION OF A POLARITY OPPOSITE TO THE FIXED BIAS PROVIDING A POLARITY OPPOSITE TO THE FIXED BIAS PROVIDING A POLARITY CHANGE TO TURN ON THE SWITCHING MEANS TO EFFECT RECTIFICATION OF THE SOURCE; AND MEANS RESPONSIVE TO THE CURRENT BETWEEN THE SOURCE AND LOAD AND CONNECTED TO PROVIDE A BIAS VARYING AS A FUNCTION OF SAID CURRENT, SAID MEANS CONNECTED TO APPLY SAID CURRENT RERSPONSIVE BIAS IN PARALLEL WITH THE CONTROLLED BIAS AND THE SAME POLARITY AS THE CONTROLLED BIAS, SAID CURRENT RESPONSIVE BIAS HAVING A POTENTIAL LESS THAN THE CONTROLLED BIAS THEREBY BEING INEFFECTIVE DURING RECTIFICATION OPERATION AND EFFECTIVE DURING INVERSION OPERATION TO PROVIDE FOR COMMUTATION AND DEIONIZATION TIME.
Claim 2
Independent Claim
217 words
A SYSTEM FOR CONTROLLING CURRENT BETWEEN A POLYPHASE POWER SOURCE AND A LOAD TO PROVIDE RECTIFICATION AND INVERSION OF THE SOURCE COMPRISING: MEANS FOR PRODUCING AN ALTERNATING CONTROL SIGNAL HAVING A PREDETERMINED PHASE RELATIONSHIP TO A PHASE OF THE SOURCE; CONTROLLED SWITCHING MEANS RESPONSIVE TO A PREDETERMINED POLARITY CHANGE OF A CONTROL SIGNAL CONNECTED BETWEEN THE SOURCE AND THE LOAD TO CONTROL THE PHASE OF THE SOURCE; MEANS CONNECTED TO BE COMBINED WITH THE CONTROL SIGNAL FOR VARIABLY BIASING THE CONTROL SIGNAL IN RESPONSE TO A PREDETERMINED OPERATING CONDITION, SAID MEANS COMPRISING A FIXED BIAS PROVIDING A POLARITY CHANGE TO TURN ON THE SWITCHING MEANS TO EFFECT INVERSION OF A POLARITY OPPOSITE TO THE FIXED BIAS PROVIDING A POLARITY OPPOSITE TO THE FIXED BIAS PROVIDING A POLARITY CHANGE TO TURN ON THE SWITCHING MEANS TO EFFECT RECTIFICATION OF THE SOURCE; AND MEANS RESPONSIVE TO THE CURRENT BETWEEN THE SOURCE AND LOAD AND CONNECTED TO PROVIDE A BIAS VARYING AS A FUNCTION OF SAID CURRENT, SAID MEANS CONNECTED TO APPLY SAID CURRENT RERSPONSIVE BIAS IN PARALLEL WITH THE CONTROLLED BIAS AND THE SAME POLARITY AS THE CONTROLLED BIAS, SAID CURRENT RESPONSIVE BIAS HAVING A POTENTIAL LESS THAN THE CONTROLLED BIAS THEREBY BEING INEFFECTIVE DURING RECTIFICATION OPERATION AND EFFECTIVE DURING INVERSION OPERATION TO PROVIDE FOR COMMUTATION AND DEIONIZATION TIME.
References Cited (Backward Citations)
US2427738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |