Control circuit to deactivate an appliance
Abstract
Abstract A CONTROL CIRCUIT FOR A FABRIC DRYING APPLIANCE INCLUDES A RELAY WHICH IS OPERATED IN RESPONSE TO CONTACT CLOSURE OF A HEAT SENSITIVE SWITCH TO DEENERGIZE THE HEATER AND THE DRIVE MOTOR UPON DETECTION OF A TEMPERATURE GREATER THAN A PREDETERMINED TEMPERATURE ADJACENT THE HEATER OR OTHER MACHINE AREA. THE RELAY INCLUDES CONTACTS WHICH CLOSE TO ESTABLISH A HOLDING CIRCUIT THEREFOR TO PREVENT ENERGIZATION OF THE HEATER AND DRIVE MOTOR UPON COOLING BELOW THE PREDETERMINED TEMPERATURE ADJACENT THE HEATER. A SWITCH IS POSITIONED FOR OPERATION BY THE ACCESS DOOR OF THE APPLIANCE AND IS SERIALLY CONNECTED IN THE HOLDING CIRCUIT OF THE RELAY IN ORDER TO PROMOTE VISUAL INSPECTION UPON THE OCCURRENCE OF AN OVERHEATED CONDITION BY INSURING THAT THE ACCESS DOOR MUST BE OPENED AND RECLOSED IN ORDER TO BREAK THE HOLDING CIRCUIT AND RESET THE CONTROL CIRCUIT FOR NORMAL OPERATION.
Inventors
- 👤 Ralph S Odle Jr
- 👤 Marvin G Steffey
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |