H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/193
H01H 35/26 (2006.01) H01H 29/06 (2006.01) H01H 29/28 (2006.01) H01H 35/30 (2006.01) H01H 61/02 (2006.01)
Patent
CA 1093618
GAS OPERATED SWITCHES ABSTRACT OF THE INVENTION: Switches operated by gas, preferably controlled electrothermally, include a capillary tube closed at both ends with a conductive liquid piston dividing the tube into two chambers each filled with a non-oxidizing gas. A pair of electrical contact points are disposed within the capillary tube with the piston positioned to, at selected intervals, contact both points simultane- ously. In one embodiment of the switches, a closed glass capillary tube contains a pair of aligned nickel wires with ends selectively contacted simultaneously by a mercury piston or globule providing a circuit-closing position for the switch. The switch is set in the circuit-closing position by applying heat to a non-oxidizing gas within one end of the capillary tube. The switch is then reset to a circuit-opening position at any desired time by applying heat to a non-oxidizing gas within the other end of the capillary tube. The non-oxidizing gas is heated by electrothermal means disposed at each end of and within the ends of the capillary tube. A barrier such as a collar disposed near the end of each of the wires is provided to prevent the mercury piston or globule from separating into a plurality of globules upon application of strong forces to the globule from either end of the tube.
281609
Gomez Richard S.
Scray Eugene J. Jr.
International Business Machines Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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