US3142013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor protective system for air conditioning unit
Assignee: Carrier Corp
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Filing: 1962-03-05
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Granted: 1964-07-21
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 William L Mcgrath
- 👤 Robert F Randolph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:55
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/0816
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A CONTROL CIRCUIT FOR A REFRIGERANT COMPRESSOR COMPRISING AN ELECTRIC MOTOR FOR ACTUATING THE COMPRESSOR; A SUPPLY CIRCUIT FOR ENERGIZING THE ELECTRIC MOTOR, A MOTOR CONTROLLER HAVING A FIRST NORMALLY OPEN SWITCH CONNECTING SAID SUPPLY CIRCUIT TO SAID MOTOR, SAID CONTROLLER HAVING AN ENERGIZING WINDING AND SECOND AND THIRD NORMALLY OPEN CONTACTS; CONTROL MEANS INCLUDING A NORMALLY CLOSED SWITCH; THERMAL TIMER MEANS INCLUDING A FIRST NORMALLY CLOSED CONTACT, A SECOND NORMALLY CLOSED CONTACT, A THIRD NORMALLY OPEN CONTACT AND A BIMETAL CONSTRUCTED AND ARRANGED TO ACTUATE THE CONTACTS; A HOLDING RELAY INCLUDING AN ENERGIZING WINDING AND A NORMALLY OPEN CONTACT; A FIRST ELECTRICAL CIRCUIT CONNECTING THE CONTROLLER WINDING, CONTROL MEANS, AND SECOND CONTROLLER CONTACT IN SERIES WITH THE SUPPLY CIRCUIT; A SECOND ELECTRICAL CIRCUIT CONNECTING THE THIRD CONTROLLER CONTACT AND ELECTRIC MOTOR IN
References Cited (Backward Citations)
US2276369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |