Patent US3233158A successfully refreshed from Google Patents.
US3233158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for controlling alternating current motors
Assignee: Westinghouse Air Brake Co
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Filing: 1962-07-26
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Granted: 1966-02-01
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Expires: 1982-07-26
Abstract
No abstract record available.
Inventors
- 👤 Chalmers W Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:45
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A CONTROL SYSTEM FOR A SINGLE PHASE INDUCTION MOTOR HAVING A MAIN WINDING, A STARTING WINDING, AND A NORMALLY CLOSED CONTACT ACTUATED TO AN OPEN POSITION WHEN THE ROTOR OF THE MOTOR EXCEEDS A PREDETERMINED SPEED, SAID SYSTEM COMPRISING, IN COMBINATION: (A) A RELAY, (B) A CAPACITOR, (C) A SOURCE OF ALTERNATING CURRENT, (D) MEANS RESPONSIVE TO THE ENERGIZATION OF SAID RELAY FOR SUPPLYING ALTERNATING CURRENT FROM SAID SOURCE SAID MAIN WINDING, (E) MEANS RESPONSIVE TO THE ENERGIZATION OF SAID RELAY FOR SUPPLYING ALTERNATING CURRENT FROM SAID SOURCE TO SAID STARTING WINDING OVER SAID NORMALLY CLOSED CONTACT AND THROUGH SAID CAPACITOR, (F) A DIODE; AND (G) MEANS, INCLUDING SAID DIODE AND RESPONSIVE TO THE DEENERGIZATION OF SAID RELAY FOLLOWING A PERIOD OF ENERGIZATION THEREOF, FOR SUPPLYING FROM SAID SOURCE HALF-WAVE RECTIFIED CURRENT TO SAID STARTING WINDING THROUGH SAID CAPACITOR AND SIMULTANEOUSLY TO SAID MAIN WINDING.
Claim 2
Dependent Claim
145 words
A CONTROL SYSTEM FOR A SINGLE PHASE INDUCTION MOTOR HAVING A MAIN WINDING, A STARTING WINDING, AND A NORMALLY CLOSED CONTACT ACTUATED TO AN OPEN POSITION WHEN THE ROTOR OF THE MOTOR EXCEEDS A PREDETERMINED SPEED, SAID SYSTEM COMPRISING, IN COMBINATION: (A) A RELAY, (B) A CAPACITOR, (C) A SOURCE OF ALTERNATING CURRENT, (D) MEANS RESPONSIVE TO THE ENERGIZATION OF SAID RELAY FOR SUPPLYING ALTERNATING CURRENT FROM SAID SOURCE SAID MAIN WINDING, (E) MEANS RESPONSIVE TO THE ENERGIZATION OF SAID RELAY FOR SUPPLYING ALTERNATING CURRENT FROM SAID SOURCE TO SAID STARTING WINDING OVER SAID NORMALLY CLOSED CONTACT AND THROUGH SAID CAPACITOR, (F) A DIODE; AND (G) MEANS, INCLUDING SAID DIODE AND RESPONSIVE TO THE DEENERGIZATION OF SAID RELAY FOLLOWING A PERIOD OF ENERGIZATION THEREOF, FOR SUPPLYING FROM SAID SOURCE HALF-WAVE RECTIFIED CURRENT TO SAID STARTING WINDING THROUGH SAID CAPACITOR AND SIMULTANEOUSLY TO SAID MAIN WINDING.
References Cited (Backward Citations)
US2637007A
Cited
US2922097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |