Electrical heating apparatus protected against an overheating co

Details Electrical heating apparatus protected against an overheating co Electrical heating apparatus protected against an overheating co

1983-09-26

1986-08-19

Paschall, M. H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219212, 219509, 361 87, 361188, 174126CP, H05B 102

Patent

active

046071547

ABSTRACT:
An electrical heating apparatus protected against an overheating condition and a temperature sensitive electrical sensor for the use therewith are disclosed. The electrical heating apparatus includes an electrical heater for generating heat in proportion to the amount of electricity flowing through it, and it provides essentially all the heat for the apparatus. An electrical sensor is disposed in a thermally responsive relationship to the electrical heater. The electrical sensor includes a coextruded pair of spaced flexible plastic conductors and a coextruded flexible temperature sensitive electrical impedance material having predetermined temperature coefficient impedance characteristics along its entire length. The temperature sensitive material is in electrical contact with the flexible conductors and controls the flow of electricity between them. A control means associated with the electrical heater and the electrical sensor is responsive to a signal from the electrical sensor to control the electrical current flowing through the heater.

REFERENCES:
patent: 4019506 (1977-04-01), Eschmann
patent: 4198562 (1980-04-01), Mills et al.
patent: 4272671 (1981-06-01), Hukagawa et al.
patent: 4315141 (1982-02-01), Mills et al.
patent: 4381789 (1983-05-01), Naser et al.

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