Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1997-06-17
1998-09-29
Paschall, Mark H.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219505, 219508, 219481, 338 22R, 361106, H05B 102
Patent
active
058147918
ABSTRACT:
An electrical assembly (10) comprising a first electrical device (12) comprised of a non-linear resistant, temperature responsive element (14) and first and second electrodes (16,18), the device (12) being connectable to a first power supply (20) such that a first electrical current (i.sub.1) travels through the resistive element (14) from the first electrode (16) to the second electrode (18). A second electrical circuit (24) is in electrical contact with the electrical device (12) such that the second circuit (24) may introduce a secondary electrical current (i.sub.2) into a localized portion of the non-linear resistant element (14), the second current (i.sub.2), when applied to the non-linear resistant element (14), causes the element (14) to change from a first resistant state to a second resistant state.
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patent: 4780598 (1988-10-01), Fahey et al.
patent: 5064997 (1991-11-01), Fang et al.
patent: 5148005 (1992-09-01), Fang et al.
patent: 5471035 (1995-11-01), Holmes
Littelfuse Inc.
Paschall Mark H.
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