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Patent US3165686A successfully refreshed from Google Patents.
US3165686A
Expired / Lapsed
US
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Motor control apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1961-07-24
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Granted: 1965-01-12
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 Ian M Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:33
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/06; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/907; Y10S388/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN APPARATUS OPERATIVE WITH A MOTOR TO VARY PERIODICALLY THE SPEED OF SAID MOTOR, THE COMBINATION OF FIRST SIGNAL PROVIDING MEANS FOR SUPPLYING A SUBSTANTIALLY SQUARE WAVE FIRST CONTROL SIGNAL, SECOND SIGNAL PROVIDING MEANS FOR SUPPLYING A SECOND CONTROL SIGNAL, SIGNAL FREQUENCY CONTROL MEANS OPERATIVE WITH SAID FIRST SIGNAL PROVDING MEANS TO PROVIDE A SELECTED FREQUENCY VARIATION PERIOD FOR SAID FIRST CONTROL SIGNAL, SIGNAL FREQUENCY VARIATION AMPLITUDE CONTROL MEANS COMMONLY OPERATIVE WITH SAID SIGNAL FREQUENCY CONTROL MEANS AND BEING OPERATIVE WITH SAID FIRST SIGNAL AND THEREBY PROVIDE A SELECTED FREFIRST CONTROL SIGNAL AND THEREBY PROVIDE A SELECTED FREQUENCY VARIATION AMPLITUDE FOR SAID FIRST CONTROL SIGNAL, WITH SAID SECOND SIGNAL PROVIDING MEANS BEING OPERATIVE WITH SAID MOTOR AND RESPONSIVE TO SAID INTEGRATED FIRST CONTROL SIGNAL FOR ENERGIZING SAID MOTOR WITH SAID SECOND CONTROL SIGNAL TO VARY THE SPEED OF SAID MOTOR BY AN AMOUNT IN ACCORDANCE WITH THE AMPLITUDE OF SAID FREQUENCY VARIATION OF THE FIRST CONTROL SIGNAL AND IN A PERIODIC MANNER IN ACCORDANCE WITH THE FREQUENCY VARIATION PERIOD OF SAID FIRST CONTROL SIGNAL.
Claim 2
Dependent Claim
174 words
IN APPARATUS OPERATIVE WITH A MOTOR TO VARY PERIODICALLY THE SPEED OF SAID MOTOR, THE COMBINATION OF FIRST SIGNAL PROVIDING MEANS FOR SUPPLYING A SUBSTANTIALLY SQUARE WAVE FIRST CONTROL SIGNAL, SECOND SIGNAL PROVIDING MEANS FOR SUPPLYING A SECOND CONTROL SIGNAL, SIGNAL FREQUENCY CONTROL MEANS OPERATIVE WITH SAID FIRST SIGNAL PROVDING MEANS TO PROVIDE A SELECTED FREQUENCY VARIATION PERIOD FOR SAID FIRST CONTROL SIGNAL, SIGNAL FREQUENCY VARIATION AMPLITUDE CONTROL MEANS COMMONLY OPERATIVE WITH SAID SIGNAL FREQUENCY CONTROL MEANS AND BEING OPERATIVE WITH SAID FIRST SIGNAL AND THEREBY PROVIDE A SELECTED FREFIRST CONTROL SIGNAL AND THEREBY PROVIDE A SELECTED FREQUENCY VARIATION AMPLITUDE FOR SAID FIRST CONTROL SIGNAL, WITH SAID SECOND SIGNAL PROVIDING MEANS BEING OPERATIVE WITH SAID MOTOR AND RESPONSIVE TO SAID INTEGRATED FIRST CONTROL SIGNAL FOR ENERGIZING SAID MOTOR WITH SAID SECOND CONTROL SIGNAL TO VARY THE SPEED OF SAID MOTOR BY AN AMOUNT IN ACCORDANCE WITH THE AMPLITUDE OF SAID FREQUENCY VARIATION OF THE FIRST CONTROL SIGNAL AND IN A PERIODIC MANNER IN ACCORDANCE WITH THE FREQUENCY VARIATION PERIOD OF SAID FIRST CONTROL SIGNAL.
References Cited (Backward Citations)
US2763824A
Cited
US2938129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |