Mercury tilt switch

Details Mercury tilt switch Mercury tilt switch

1975-07-31

1976-08-31

Broome, Harold

Electricity: circuit makers and breakers

Liquid contact

Tiltable or rotatable

200222, 335 54, H01H 2922

Patent

active

039783014

ABSTRACT:
A tilt switch formed of a cap and header welded together at their rims to form an enclosure, and assuming the rims to be horizontal, on electrode passing vertically through one of the cap and header via an insulator. The inside of the enclosure and the electrode are mercury wettable and only enough mercury is provided to wet the inner surface of the enclosure with a thin layer of mercury, plus a small pool of mercury into which the electrode extends while the electrode is vertical or within a predetermined small conical angle from the vertical, the pool of mercury responding to gravity to bare the electrode when the predetermined conical angle is exceeded by tilting the switch.

REFERENCES:
patent: 2150379 (1939-03-01), Kerschbaum
patent: 3369094 (1968-02-01), Langberg et al.
patent: 3646490 (1972-02-01), Bitko

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