Patent US3218537A successfully refreshed from Google Patents.
US3218537A
Expired / Lapsed
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Motor acceleration and braking control system with static current sensing
Assignee: Westinghouse Electric Corp
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Filing: 1963-01-28
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Granted: 1965-11-16
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Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 John J Stamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:37
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/18; H02P1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A CONTROL SYSTEM, IN COMBINATION, A MOTOR, A POWER CONDUCTOR, SWITCHING MEANS FOR CONNECTING THE MOTOR TO THE POWER CONDUCTOR TO ACCELERATE THE MOTOR, ADDITIONAL SWITCHING MEANS FOR ESTABLISHING DYNAMIC BRAKING CONNECTIONS FOR THE MOTOR, VARIABLE RESISTANCE MEANS FOR CONTROLLING THE MOTOR CURRENT DURING ACCELERATION AND BRAKING, CONTROL MEANS FOR VARYING SAID RESISTANCE MEANS, ELECTROMAGNETIC MEANS FOR CONTROLLING THE OPERATION OF SAID CONTROL MEANS, A ZENER DIODE RESPONSIVE TO THE MOTOR CURRENT DURING ACCELERATION, ANOTHER ZENER DIODE RESPONSIVE TO THE MOTOR CURRENT DURING DYNAMIC BRAKING, AND SAID ZENER DIODES CONTROLLING THE ENERGIZATION OF SAID ELECTROMAGNETIC MEANS.
Claim 2
Dependent Claim
97 words
IN A CONTROL SYSTEM, IN COMBINATION, A MOTOR, A POWER CONDUCTOR, SWITCHING MEANS FOR CONNECTING THE MOTOR TO THE POWER CONDUCTOR TO ACCELERATE THE MOTOR, ADDITIONAL SWITCHING MEANS FOR ESTABLISHING DYNAMIC BRAKING CONNECTIONS FOR THE MOTOR, VARIABLE RESISTANCE MEANS FOR CONTROLLING THE MOTOR CURRENT DURING ACCELERATION AND BRAKING, CONTROL MEANS FOR VARYING SAID RESISTANCE MEANS, ELECTROMAGNETIC MEANS FOR CONTROLLING THE OPERATION OF SAID CONTROL MEANS, A ZENER DIODE RESPONSIVE TO THE MOTOR CURRENT DURING ACCELERATION, ANOTHER ZENER DIODE RESPONSIVE TO THE MOTOR CURRENT DURING DYNAMIC BRAKING, AND SAID ZENER DIODES CONTROLLING THE ENERGIZATION OF SAID ELECTROMAGNETIC MEANS.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |