Drawback device controlled by liquid surface tension, a switch i

Details Drawback device controlled by liquid surface tension, a switch i Drawback device controlled by liquid surface tension, a switch i

1982-01-22

1984-09-11

Marcus, Stephen

Electricity: circuit makers and breakers

Liquid contact

Having capillary tube means

200182, 200234, 200235, 335 56, H01H 2900

Patent

active

044711905

ABSTRACT:
A drawback device to ensure the return of a moving part to its original position, after it has been moved away from it by another force. The existing method, involving an elastic mechanical component which acts as a spring, is replaced in this invention by a quantity of liquid, placed between the moving part and a fixed part, and remaining there through the effect of capillarity. When the moving part moves away from the fixed part, surface tension is created on the surface of the liquid, tending to draw the moving part back to its original position. Such devices are used in sealed miniaturized relays with mercury-wetted contacts.

REFERENCES:
patent: 2312672 (1943-03-01), Pollard, Jr.
patent: 3144533 (1964-08-01), Donath
patent: 3343110 (1967-09-01), Grobe
patent: 4085392 (1978-04-01), Lacis et al.
patent: 4114006 (1978-09-01), Tedeschi
patent: 4148000 (1979-04-01), Lacis et al.
patent: 4236129 (1980-11-01), Lacis et al.
patent: 4375055 (1983-02-01), Holvoet et al.
patent: 4400671 (1983-08-01), Legrand
"New Construction for a Mercury-Wetted Switch for Operation in any Position", by Legrand and Frances, vol. 2, p. 625, of Proceedings of the Tenth International Conference on Electric Contact Phenomena.

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