Electrical devices containing PTC elements

Details Electrical devices containing PTC elements Electrical devices containing PTC elements

1979-02-01

1982-02-02

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

With heating unit structure

174110PM, 219505, 219510, 219528, 219544, 219548, 264105, 252511, 338 20, 338 22R, 338214, H05B 310

Patent

active

043141455

ABSTRACT:
The invention relates to novel electrical devices which are useful for example as heaters and temperature sensors, and which comprise at least two electrodes, at least one PTC element, at least one relatively constant wattage element, and at least one current-directing element which directs the current, when the device is first connected to a source of electrical power, so that the effective initial resistance of the device is greater than it would be in the absence of said element. Thus the invention provides a solution to the problem of current inrush in application of PTC devices in which substantial current passes through the device at operating temperatures. The invention also includes the use of the novel devices in applications in which current inrush is not a problem.

REFERENCES:
patent: 3351882 (1967-11-01), Kohler et al.
patent: 4017715 (1977-04-01), Whitney et al.
patent: 4085286 (1978-04-01), Horsma et al.
patent: 4177376 (1979-12-01), Horsma et al.
patent: 4188276 (1980-02-01), Lyons et al.
patent: 4246468 (1981-01-01), Horsma

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