Patent US3153182A successfully refreshed from Google Patents.
US3153182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic braking of a. c. motors
Assignee: Associated Electrical Industries Ltd
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Filing: 1961-09-01
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Granted: 1964-10-13
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Expires: 1981-09-01
Abstract
No abstract record available.
Inventors
- 👤 Choudhury Shafi-Uddin Ahmed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:08
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/24; H02P3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AN ARRANGEMENT FOR APPLYING DYNAMIC BRAKING TO A THREE-PHASE INDUCTION MOTOR HAVING A STATOR WITH A THREE-PHASE PRIMARY WINDING ON SAID STATOR, AND A ROTOR WITH A SECONDARY WINDING ON SAID ROTOR, COMPRISING A THREE-PHASE SOURCE OF ALTERNATING CURRENT, A CONTACTOR HAVING MAIN AND AUXILIARY CONTACTS AND AN OPERATING COIL, SAID MAIN CONTACTS BEING OPERATIVELY CONNECTED AND ARRANGED TO CONNECT SAID PRIMARY WINDING TO SAID SOURCE OF SUPPLY AND TO DISCONNECT SAID PRIMARY WINDING THEREFROM, CAPACITOR MEANS, MEANS COMPRISING SAID AUXILIARY CONTACTS FOR CONNECTING SAID CAPACITOR MEANS ACROSS SAID PRIMARY WINDING WHEN SAID CONTACTOR IS OPERATED TO OPEN
Claim 2
Dependent Claim
98 words
AN ARRANGEMENT FOR APPLYING DYNAMIC BRAKING TO A THREE-PHASE INDUCTION MOTOR HAVING A STATOR WITH A THREE-PHASE PRIMARY WINDING ON SAID STATOR, AND A ROTOR WITH A SECONDARY WINDING ON SAID ROTOR, COMPRISING A THREE-PHASE SOURCE OF ALTERNATING CURRENT, A CONTACTOR HAVING MAIN AND AUXILIARY CONTACTS AND AN OPERATING COIL, SAID MAIN CONTACTS BEING OPERATIVELY CONNECTED AND ARRANGED TO CONNECT SAID PRIMARY WINDING TO SAID SOURCE OF SUPPLY AND TO DISCONNECT SAID PRIMARY WINDING THEREFROM, CAPACITOR MEANS, MEANS COMPRISING SAID AUXILIARY CONTACTS FOR CONNECTING SAID CAPACITOR MEANS ACROSS SAID PRIMARY WINDING WHEN SAID CONTACTOR IS OPERATED TO OPEN
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |