Patent US3175124A successfully refreshed from Google Patents.
US3175124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical control circuits
Assignee: General Electric Co
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Filing: 1961-06-16
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Granted: 1965-03-23
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Expires: 1981-06-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Wilbur W Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:49
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/085; H02H3/00; H02H3/02; H02H3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A CIRCUIT FOR CONTROLLING ENERGIZATION OF AN ELECTRIC MOTOR OF THE INHERENTLY PROTECTED TYPE FROM A POWER SOURCE, AN OVERLOAD RESPONSIVE DEVICE FOR PROTECTING THE MOTOR AGAINST OVERLOAD CONDITIONS, SAID OVERLOAD RESPONSIVE DEVICE HAVING NON-LOCKABLE CONTACTS WHICH OPEN IN RESPONSE TO AN OVERLOAD CONDITION AND WHICH AUTOMATICALLY CLOSE SUBSEQUENT TO ELIMINATION OF THE OVERLOAD CONDITION, A CONTACTOR FOR CONTROLLING ENERGIZATION OF THE MOTOR HAVING AN OPERATING WINDING TO BE CONNECTED IN SERIES CIRCUIT WITH SAID NONLOCKABLE CONTACTS ACROSS A POWER SOURCE, A RELAY HAVING CONTACTS CONNECTED IN SAID SERIES CIRCUIT, SAID RELAY INCLUDING MEANS DISPOSED FOR OPERATION IN RESPONSE TO OPENING OF SAID NON-LOCKABLE CONTACTS FOR OPENING THE RELAY CONTACTS TO INTERRUPT THE SERIES CIRCUIT AND FOR MAINTAINING THE RELAY CONTACTS OPEN UNTIL A MANUAL CONTACT CLOSING OPERATION IS PERFORMED, AND MEANS MANUALLY OPERABLE TO EFFECT CLOSURE OF SAID RELAY CONTACTS AND PERMIT REESTABLISHMENT OF THE SERIES CIRCUIT.
Claim 2
Dependent Claim
149 words
IN A CIRCUIT FOR CONTROLLING ENERGIZATION OF AN ELECTRIC MOTOR OF THE INHERENTLY PROTECTED TYPE FROM A POWER SOURCE, AN OVERLOAD RESPONSIVE DEVICE FOR PROTECTING THE MOTOR AGAINST OVERLOAD CONDITIONS, SAID OVERLOAD RESPONSIVE DEVICE HAVING NON-LOCKABLE CONTACTS WHICH OPEN IN RESPONSE TO AN OVERLOAD CONDITION AND WHICH AUTOMATICALLY CLOSE SUBSEQUENT TO ELIMINATION OF THE OVERLOAD CONDITION, A CONTACTOR FOR CONTROLLING ENERGIZATION OF THE MOTOR HAVING AN OPERATING WINDING TO BE CONNECTED IN SERIES CIRCUIT WITH SAID NONLOCKABLE CONTACTS ACROSS A POWER SOURCE, A RELAY HAVING CONTACTS CONNECTED IN SAID SERIES CIRCUIT, SAID RELAY INCLUDING MEANS DISPOSED FOR OPERATION IN RESPONSE TO OPENING OF SAID NON-LOCKABLE CONTACTS FOR OPENING THE RELAY CONTACTS TO INTERRUPT THE SERIES CIRCUIT AND FOR MAINTAINING THE RELAY CONTACTS OPEN UNTIL A MANUAL CONTACT CLOSING OPERATION IS PERFORMED, AND MEANS MANUALLY OPERABLE TO EFFECT CLOSURE OF SAID RELAY CONTACTS AND PERMIT REESTABLISHMENT OF THE SERIES CIRCUIT.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |