Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1985-01-11
1986-04-29
Paschall, M. H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219501, 340584, 340526, H05B 102
Patent
active
045859264
ABSTRACT:
A temperature control and indicating arrangement comprises an electric heating element; a thermostat connected in series with the heating element and responsive to the heat generated thereby; and structure responsive to the operation of the thermostat for indicating when the temperature in the region of the thermostat reaches a value determined by the thermostat. Included are a resettable electronic counter; a circuit for resetting the counter each time a power supply is connected to the arrangement; a detector for detecting cyclically repetitive switching operations of the thermostat and for causing the counter to count such operations immediately following each resetting of the counter; and counter-stop circuit for stopping the counter at a given count position corresponding to a count value greater than unity. The indicating structure includes a visual indicator electrically coupled to the counter to provide a visible indication when the counter is in the given count position.
REFERENCES:
patent: 2518503 (1950-08-01), Sparklin
patent: 3803383 (1974-04-01), Fresard et al.
patent: 4347430 (1982-08-01), Leicester et al.
Paschall M. H.
Schneider Rolf E.
U.S. Philips Corporation
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