Thermal power sustaining switch
Patent 4117346 Issued on September 26, 1978. Estimated Expiration Date: 
December 2, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 2, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1328477 1328482 1335709 On-off switch with time delay Patent #: 3943375 InventorApplicationNo. 05/746849 filed on 12/02/1976US Classes:307/117, Light, heat, vibratory or radiant energy337/37, With manual or other mechanical contact controlling means361/211CONTROL CIRCUITS FOR NONELECTROMAGNETIC TYPE RELAY (E.G., THERMAL RELAYS)ExaminersPrimary: Hix, L. T.Assistant: Schreyer, S. D. Attorney, Agent or FirmInternational ClassesH01H 43/30 (20060101)H01H 43/00 (20060101) AbstractA power sustaining thermal switch placed in shunt with an existing electrical switch results in the flow of electricity through the thermal switch for a predetermined period of time after the existing switch has been turned off. Thus sustaining power in the thermal switch circuit for supply to an electrical device. | |
