Temperature limiting circuit for electric hair dryers
Patent 4088869 Issued on May 9, 1978. Estimated Expiration Date: 
May 9, 1995. 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.
May 9, 1995. 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 1978413 2080799 3089942 3308268 3731057 InventorAssigneeApplicationNo. 610977 filed on 09/08/1975US Classes:392/384, With handle34/97, With gas or vapor flow for contact219/484Of diverse resistance characteristics or valueExaminersPrimary: Bartis, A.Attorney, Agent or FirmForeign Patent References
International ClassesH05B 001/02F24H 003/04 AbstractA hair dryer includes a casing having an air inlet and an air exit defining an exit plane. A motor driven fan propels air through the casing between the air inlet and exit. Plural wattage electric heating elements are disposed in a heater box in the casing for heating air to a selected temperature for discharge through the casing air exit. A thermostat, positioned downstream of the heating elements substantially centrally across the exit plane of the casing and disposed substantially in the exit plane, is connected in series circuit with at least some of the heating elements. The thermostat rapidly senses the air temperature at the air exit and disconnects the connected heating elements. | |
