US3178626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting circuit for wound rotor motors
Assignee: General Electric Co
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Filing: 1960-12-27
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Granted: 1965-04-13
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Charles W Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:22
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/26; H02P1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE COMBINATION, IN A STARTING CIRCUIT FOR A WOUND ROTOR POLYPHASE INDUCTION MOTOR, OF A SECONDARY POLYPHASE CIRCUIT CONNECTED IN THE ROTOR WINDING OF SAID MOTOR, AND COMPRISING RESISTANCE MEANS IN EACH PHASE BETWEEN SAID WINDING AND A COMMON NEUTRAL, AND A BRANCH CIRCUIT FOR EACH PHASE COMPRISING A REACTOR AND RESISTANCE MEANS IN SERIES THEREWITH CONNECTED BETWEEN A POINT INTERMEDIATE THE ENDS OF SAID FIRST MENTIONED RESISTANCE MEANS AND A COMMON NEUTRAL, AND MEANS TO MAINTAIN THE TORQUE PRODUCED BY SAID MOTOR DURING THE STARTING OPERATION WITHIN A DESIRED RANGE, SAID MEANS COMPRISING MEANS TO SHORT CIRCUIT TOGETHER A DESIRED INTERMEDIATE POINT ON EACH OF SAID REACTORS AT A TIME IN THE STARTING OPERATION WHEN THE TORQUE DROPS TOWARD THE LOWER LIMIT OF SAID RANGE, SAID INTERMEDIATE POINTS BEING SO CHOSEN ON SAID REACTORS THAT AFTER ESTABLISHMENT OF SAID SHORT CIRCUIT THE TORQUE RISES WITH INCREASED SPEED TO A DESIRED VALUE WITHIN SAID RANGE.
Claim 2
Dependent Claim
155 words
THE COMBINATION, IN A STARTING CIRCUIT FOR A WOUND ROTOR POLYPHASE INDUCTION MOTOR, OF A SECONDARY POLYPHASE CIRCUIT CONNECTED IN THE ROTOR WINDING OF SAID MOTOR, AND COMPRISING RESISTANCE MEANS IN EACH PHASE BETWEEN SAID WINDING AND A COMMON NEUTRAL, AND A BRANCH CIRCUIT FOR EACH PHASE COMPRISING A REACTOR AND RESISTANCE MEANS IN SERIES THEREWITH CONNECTED BETWEEN A POINT INTERMEDIATE THE ENDS OF SAID FIRST MENTIONED RESISTANCE MEANS AND A COMMON NEUTRAL, AND MEANS TO MAINTAIN THE TORQUE PRODUCED BY SAID MOTOR DURING THE STARTING OPERATION WITHIN A DESIRED RANGE, SAID MEANS COMPRISING MEANS TO SHORT CIRCUIT TOGETHER A DESIRED INTERMEDIATE POINT ON EACH OF SAID REACTORS AT A TIME IN THE STARTING OPERATION WHEN THE TORQUE DROPS TOWARD THE LOWER LIMIT OF SAID RANGE, SAID INTERMEDIATE POINTS BEING SO CHOSEN ON SAID REACTORS THAT AFTER ESTABLISHMENT OF SAID SHORT CIRCUIT THE TORQUE RISES WITH INCREASED SPEED TO A DESIRED VALUE WITHIN SAID RANGE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |