US3295037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic bi-directional d. c. motor braking
Assignee: Collins Radio Co
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Filing: 1964-09-09
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Granted: 1966-12-27
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Expires: 1984-09-09
Abstract
No abstract record available.
Inventors
- 👤 Robert C Bullene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:29
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A BIDIRECTIONAL DRIVE AND BRAKING SYSTEM FOR A DIRECT CURRENT MOTOR COMPRISING A SOURCE OF FULL WAVE RECTIFIED ALTERNATING CURRENT VOLTAGE, A FIRST RESISTIVE MEMBER AND A FIRST SILICON CONTROLLED RECTIFIER ELEMENT RESPECTIVELY SERIALLY CONNECTED ACROSS SAID VOLTAGE SOURCE, A SECOND RESISTIVE MEMBER AND A SECOND SILICON CONTROLLED RECTIFIER ELEMENT RESPECTIVELY SERIALLY CONNECTED ACROSS SAID VOLTATE SOURCE, SAID DIRECT CURRENT MOTOR HAVING A FIRST TERMINAL CONNECTED BETWEEN THE JUNCTION OF SAID FIRST RESISTIVE MEMBER AND SAID FIRST SILICON CONTROLLED RECTIFIER AND A SECOND TERMINAL CONNECTED TO THE JUNCTION BETWEEN SAID SECOND RESISTIVE MEMBER AND SAID SECOND SILICON CONTROLLED RECTIFIER, AND CONTROL MEANS ASSOCIATED WITH EACH OF SAID SILICON CONTROLLED RECTIFIER TO RENDER CONDUCTIVE SELECTED ONES THEREOF, SAID CONTROL MEANS AFFECTING A FIRST OPERATIONAL MODE DEFINED BY BOTH OF SAID SILICON CONTROLLED RECTIFIERS BEING RENDERED CONDUCTIVE, A SECOND OPERATIONAL MODE DEFINED BY ONLY SAID FIRST SILICON CONTROLLED RECTIFIER BEING RENDERED CONDUCTIVE, AND A THIRD OPERATIONAL MODE CHARACTERIZED BY ONLY SAID SECOND SILICON CONTROLLED RECTIFIER BEING RENDERED CONDUCTIVE.
Claim 2
Dependent Claim
166 words
A BIDIRECTIONAL DRIVE AND BRAKING SYSTEM FOR A DIRECT CURRENT MOTOR COMPRISING A SOURCE OF FULL WAVE RECTIFIED ALTERNATING CURRENT VOLTAGE, A FIRST RESISTIVE MEMBER AND A FIRST SILICON CONTROLLED RECTIFIER ELEMENT RESPECTIVELY SERIALLY CONNECTED ACROSS SAID VOLTAGE SOURCE, A SECOND RESISTIVE MEMBER AND A SECOND SILICON CONTROLLED RECTIFIER ELEMENT RESPECTIVELY SERIALLY CONNECTED ACROSS SAID VOLTATE SOURCE, SAID DIRECT CURRENT MOTOR HAVING A FIRST TERMINAL CONNECTED BETWEEN THE JUNCTION OF SAID FIRST RESISTIVE MEMBER AND SAID FIRST SILICON CONTROLLED RECTIFIER AND A SECOND TERMINAL CONNECTED TO THE JUNCTION BETWEEN SAID SECOND RESISTIVE MEMBER AND SAID SECOND SILICON CONTROLLED RECTIFIER, AND CONTROL MEANS ASSOCIATED WITH EACH OF SAID SILICON CONTROLLED RECTIFIER TO RENDER CONDUCTIVE SELECTED ONES THEREOF, SAID CONTROL MEANS AFFECTING A FIRST OPERATIONAL MODE DEFINED BY BOTH OF SAID SILICON CONTROLLED RECTIFIERS BEING RENDERED CONDUCTIVE, A SECOND OPERATIONAL MODE DEFINED BY ONLY SAID FIRST SILICON CONTROLLED RECTIFIER BEING RENDERED CONDUCTIVE, AND A THIRD OPERATIONAL MODE CHARACTERIZED BY ONLY SAID SECOND SILICON CONTROLLED RECTIFIER BEING RENDERED CONDUCTIVE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |