Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1981-12-21
1983-11-08
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
315DIG7, H02H 904
Patent
active
044146000
ABSTRACT:
A thickfilm manufactured resistive element that functions as a normal resistor in an HID lamp starting circuit where high voltage starting pulses are produced, but which exhibits a negative and extremely non-linear voltage coefficient of resistance characteristic when potentially destructive high voltage spikes occur as a result of circuit interruption during operation of the lamp. The resistive element is comprised of a mixture of refractory conductive, semiconductive, and nonconductive materials of an amorphous noncrystalline nature having the physical structure of a supercooled liquid, commonly referred to as glass, which has been discovered to exhibit the property of having an extremely non-linear voltage coefficient of resistance.
REFERENCES:
patent: 3568125 (1971-03-01), Villemant et al.
patent: 4087723 (1978-05-01), Chermin et al.
patent: 4208449 (1980-06-01), Knippenberg et al.
patent: 4326149 (1982-04-01), Wyner et al.
Eisenzopf Reinhard J.
Esquire, Inc.
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