Electricity: electrical systems and devices – Safety and protection of systems and devices – Capacitor protection
Patent
1991-05-23
1993-04-27
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Capacitor protection
337140, 320 40, 361 17, H02H 716
Patent
active
052067750
ABSTRACT:
A circuit bypass device (30) having terminals (70, 80) is connected to contacts (70, 80) of a cell (20) to provide a conductive path (40) in response to voltage excursion therebetween. Device (30) includes: a conductive shunt (40), coupled to contacts (70, 80), that is movable from a normally non-conductive position to a conductive position between terminals (70, 80); a detector (50), coupled to conductive shunt (40), for sensing voltage excursion beyond specified limits between contacts (70, 80); and an actuator (60) having a heat-to-recover shape memory metal alloy that is formed to contract when detector (50) senses the voltage excursion, for moving conductive shunt (40) from the non-conductive position to the conductive position. The formed alloy is preferably spring-shape which contracts translationally and torsionally.
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HEDRB presentation by Hughes to U.S. Gov't. Dec. 13, 1989.
Fernandez Dennis S.
Ferrell John S.
Pellinen A. D.
Radlo Edward J.
Schultz C.
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