Electricity: circuit makers and breakers – Liquid contact – Combined
Patent
1976-07-01
1978-07-25
Tudor, Harold
Electricity: circuit makers and breakers
Liquid contact
Combined
200191, 335 47, H01H 2900
Patent
active
041031350
ABSTRACT:
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 simultaneously. 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.
REFERENCES:
patent: 1598874 (1926-09-01), Phelan
patent: 2666105 (1954-01-01), Menozzi et al.
patent: 2744980 (1956-05-01), Bellamy
patent: 2802918 (1957-08-01), Boyle
patent: 3144533 (1964-08-01), Donath
patent: 3176101 (1965-03-01), Awender et al.
patent: 3646490 (1972-02-01), Bitko
Gomez Richard Santiago
Scray, Jr. Eugene James
International Business Machines - Corporation
Limanek Stephen J.
Tudor Harold
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