Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1981-02-20
1982-08-24
Reynolds, B. A.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219528, 219549, 219505, 219507, 1565837, H05B 102
Patent
active
043462863
ABSTRACT:
Temperature controlled electrical power supply apparatus for heating carpet-joining tape of the type having a conducting foil adapted to be heated by electric current to melt adhesive thereon includes first control circuitry for receiving A-C power supply voltage and a first adjustable resistor to provide an adjustable high current output. A switch is parallelly connected with the first normally open contacts of a first relay and actuated by the closure of a switch with second normally open contacts of that relay closed to enable the high current output. Second control circuitry includes a thermistor adapted to be connected in thermal contact with the foil such that the high current output is interrupted when the temperature of the foil reaches a preset temperature so as to maintain the foil temperature substantially constant. An SCR includes a gate circuit connected to the thermistor for controlling a second relay to interrupt the high current output.
REFERENCES:
patent: 3794950 (1974-02-01), Kilner
patent: 4031352 (1977-06-01), Oosterberg
patent: 4108713 (1978-08-01), Weisz
Canargo International Pty. Ltd.
Paschall M.
Reynolds B. A.
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