Patent US1890668A successfully refreshed from Google Patents.
Patent US3247438A successfully refreshed from Google Patents.
US3247438A
Expired / Lapsed
US
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Control circuits of motors of refrigerant compressors
Assignee: McQuay Perfex Inc
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Filing: 1964-03-26
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Granted: 1966-04-19
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 William K Kyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/24; H02H; H02H7/00; H02H7/08; H02H7/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A CONTROL CIRCUIT FOR A MOTOR OF A REFRIGERANT COMPRESSOR, COMPRISING A FIRST RELAY HAVING AN ENERGIZING COIL, AND HAVING A NORMALLY OPEN SWITCH WHICH CLOSES WHEN SAID COIL IS ENERGIZED; A THERMAL RELAY HAVING A HEATER RESISTOR CONNECTED ACROSS SAID COIL, HAVING A NORMALLY CLOSED SWITCH WHICH OPENS AFTER SAID RESISTOR IS ENERGIZED, AND HAVING A NORMALLY OPEN SWITCH WHICH CLOSES AFTER SAID RESISTOR IS ENERGIZED; ELECTRIC SUPPLY CONNECTIONS; A CONTROL SWITCH; MEANS INCLUDING SAID CONTROL SWITCH AND SAID NORMALLY CLOSED SWITCH IN SERIES FOR CONNECTING SAID COIL AND SAID RESISTOR TO SAID CONNECTIONS; A STARTER RELAY FOR SAID MOTOR, SAID STARTER RELAY HAVING AN ENERGIZING COIL, AND HAVING A NORMALLY OPEN SWITCH WHICH CLOSES WHEN SAID LAST MENTIONED COIL IS ENERGIZED; MEANS INCLUDING SAID LAST MENTIONED SWITCH FOR CONNECTING SAID MOTOR TO SAID CONNECTIONS, AND MEANS INCLUDING SAID NORMALLY OPEN SWITCH OF SAID THERMAL RELAY AND SAID SWITCH OF SAID FIRST RELAY IN SERIES FOR CONNECTING SAID COIL OF SAID STARTER RELAY TO SAID CONNECTIONS.
Claim 2
Dependent Claim
167 words
A CONTROL CIRCUIT FOR A MOTOR OF A REFRIGERANT COMPRESSOR, COMPRISING A FIRST RELAY HAVING AN ENERGIZING COIL, AND HAVING A NORMALLY OPEN SWITCH WHICH CLOSES WHEN SAID COIL IS ENERGIZED; A THERMAL RELAY HAVING A HEATER RESISTOR CONNECTED ACROSS SAID COIL, HAVING A NORMALLY CLOSED SWITCH WHICH OPENS AFTER SAID RESISTOR IS ENERGIZED, AND HAVING A NORMALLY OPEN SWITCH WHICH CLOSES AFTER SAID RESISTOR IS ENERGIZED; ELECTRIC SUPPLY CONNECTIONS; A CONTROL SWITCH; MEANS INCLUDING SAID CONTROL SWITCH AND SAID NORMALLY CLOSED SWITCH IN SERIES FOR CONNECTING SAID COIL AND SAID RESISTOR TO SAID CONNECTIONS; A STARTER RELAY FOR SAID MOTOR, SAID STARTER RELAY HAVING AN ENERGIZING COIL, AND HAVING A NORMALLY OPEN SWITCH WHICH CLOSES WHEN SAID LAST MENTIONED COIL IS ENERGIZED; MEANS INCLUDING SAID LAST MENTIONED SWITCH FOR CONNECTING SAID MOTOR TO SAID CONNECTIONS, AND MEANS INCLUDING SAID NORMALLY OPEN SWITCH OF SAID THERMAL RELAY AND SAID SWITCH OF SAID FIRST RELAY IN SERIES FOR CONNECTING SAID COIL OF SAID STARTER RELAY TO SAID CONNECTIONS.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |