PTC resistance heater

Details PTC resistance heater PTC resistance heater

1974-11-29

1976-12-07

Bartis, A.

Electric heating

Heating devices

With heating unit structure

174 16HS, 219505, 219534, 219540, 219544, 338 22R, 338328, H05B 302, H01C 702

Patent

active

039964477

ABSTRACT:
An electrical heater device includes a disc-like ceramic resistor element of a material of positive temperature coefficient of resistivity having contact surfaces formed on a broad opposite sides of the element. A pair of device terminals engage respective contact surfaces of the resistor element for directing electrical current through the element. At least one of the terminals has a plurality of protuberances resiliently engaged with a limited area of one contact surface of the resistor element to provide good electrical connection to the element in a convenient manner. In addition, an inert silicone material having a metallic particulate dispersed therein is disposed between the terminal and the remaining area of the contact surface of the resistor element to maximize heat transfer from the element to the terminal so that heat generated by the resistor element is efficiently emitted from the heater device.

REFERENCES:
patent: 2606986 (1952-08-01), Sweger
patent: 2880295 (1959-03-01), Huffman
patent: 2933708 (1960-04-01), Elliot et al.
patent: 2967984 (1961-01-01), Jamison
patent: 2988717 (1961-06-01), Bergsma
patent: 3391242 (1968-07-01), Sudges
patent: 3430336 (1969-03-01), Riddel
patent: 3584189 (1971-06-01), Marcoux
patent: 3720807 (1973-03-01), Ting

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