G - Physics – 05 – D
Patent
G - Physics
05
D
341/32.3
G05D 23/24 (2006.01) H05B 3/54 (2006.01)
Patent
CA 1187967
ABSTRACT OF THE DISCLOSURE The automatic temperature control device for an electric appliance such as an electric blanket comprises a heater element, a sensor made of a thermosensitive material having an impedance, which changes as the tempera- ture varies, for detecting the temperature of the heater element, a switching element such as an SCR for regulating the supply of electric power to the heater element, and a plurality of electronic circuits comprising specifically a pulse supplying circuit and a pulse discriminating cir- cuit for driving the switching element in response to an output signal from the sensor, thereby assuring a safe operation of the automatic temperature control device against the occurrence of any failure.
444604
Iwasa Takashi
Murakami Hirokuni
Ueda Yasukiyo
Marks & Clerk
Matsushita Electric Industrial Co. Ltd.
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