Patent US3440509A successfully refreshed from Google Patents.
US3440509A
Expired / Lapsed
US
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Resynchronizing means for brushless synchronous motors
Assignee: Westinghouse Electric Corp
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Filing: 1966-11-21
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Granted: 1969-04-22
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Expires: 1986-11-21
Abstract
No abstract record available.
Inventors
- 👤 Anthony Tomeo
- 👤 John Allison Nelson
- 👤 Arthur H Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:29
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/38; H02J3/40; H02J3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
A SYNCHRONOUS MOTOR CONTROL ARRANGEMENT FOR ATTEMPTING RESYNCHRONIZATION OF THE MOTOR AFTER PULLOUT, AND FOR TURNING THE MOTOR OFF AFTER A PREDETERMINED NUMBER OF ATTEMPTS AT RESYNCHRONIZATION, THE ARRANGEMENT COMPRISING MEANS FOR CONTROLLING THE ENERGIZATION OF THE MOTOR, TIME DELAY MEANS CONNECTED TO BE ENERGIZED UPON ENERGIZATION OF THE MOTOR, THE TIME DELAY MEANS BEING ADAPTED TO APPLY A LOAD TO THE MOTOR AFTER THE MOTOR HAS STARTED TO RUN AND AFTER A PERIOD OF TIME SUFFICIENT TO ALLOW SYNCHRONIZATION OF THE MOTOR, MEANS FOR SENSING THE SYNCHRONOUS CONDITION OF THE MOTOR, RELAY MEANS FOR DEENERGIZING THE TIME DELAY MEANS TO EFFECT REMOVAL OF THE LOAD WHEN THE SENSING MEANS SENSES AN OUT-OF-STEP CONDITION IN THE MOTOR, A COUNTING DEVICE, THE RELAY MEANS BEING FURTHER ADAPTED TO ACTUATE THE COUNTING DEVICE, AND THEREAFTER TO CAUSE REENERGIZATION OF THE TIME DELAY MEANS, THE TIME DELAY MEANS BEING AGAIN EFFECTIVE TO RELOAD THE MOTOR AFTER THE PERIOD OF TIME SUFFICIENT TO ALLOW SYNCHRONIZATION OF THE MOTOR, THE COUNTING DEVICE BEING EFFECTIVE TO COUNT THE NUMBER OF TIMES THE LOAD IS REMOVED FROM THE MOTOR, AND TO CAUSE ACTUATION OF THE CONTROL MEANS TO DEENERGIZE THE MOTOR WHEN THE COUNTING DEVICE COUNTS A PRESET NUMBER OF TIMES.
Claim 2
Dependent Claim
204 words
A SYNCHRONOUS MOTOR CONTROL ARRANGEMENT FOR ATTEMPTING RESYNCHRONIZATION OF THE MOTOR AFTER PULLOUT, AND FOR TURNING THE MOTOR OFF AFTER A PREDETERMINED NUMBER OF ATTEMPTS AT RESYNCHRONIZATION, THE ARRANGEMENT COMPRISING MEANS FOR CONTROLLING THE ENERGIZATION OF THE MOTOR, TIME DELAY MEANS CONNECTED TO BE ENERGIZED UPON ENERGIZATION OF THE MOTOR, THE TIME DELAY MEANS BEING ADAPTED TO APPLY A LOAD TO THE MOTOR AFTER THE MOTOR HAS STARTED TO RUN AND AFTER A PERIOD OF TIME SUFFICIENT TO ALLOW SYNCHRONIZATION OF THE MOTOR, MEANS FOR SENSING THE SYNCHRONOUS CONDITION OF THE MOTOR, RELAY MEANS FOR DEENERGIZING THE TIME DELAY MEANS TO EFFECT REMOVAL OF THE LOAD WHEN THE SENSING MEANS SENSES AN OUT-OF-STEP CONDITION IN THE MOTOR, A COUNTING DEVICE, THE RELAY MEANS BEING FURTHER ADAPTED TO ACTUATE THE COUNTING DEVICE, AND THEREAFTER TO CAUSE REENERGIZATION OF THE TIME DELAY MEANS, THE TIME DELAY MEANS BEING AGAIN EFFECTIVE TO RELOAD THE MOTOR AFTER THE PERIOD OF TIME SUFFICIENT TO ALLOW SYNCHRONIZATION OF THE MOTOR, THE COUNTING DEVICE BEING EFFECTIVE TO COUNT THE NUMBER OF TIMES THE LOAD IS REMOVED FROM THE MOTOR, AND TO CAUSE ACTUATION OF THE CONTROL MEANS TO DEENERGIZE THE MOTOR WHEN THE COUNTING DEVICE COUNTS A PRESET NUMBER OF TIMES.
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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |