Electric switch

Details Electric switch Electric switch

1992-05-20

1995-06-06

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

335207, 361 88, H01H 900

Patent

active

054226163

ABSTRACT:
An electric switch 11 has contacts 12 and 13 which are initially closed by activating means 14. The invention provides urging means 22 to bias the switch against reopening of the contacts during at least an initial period which is useful if the activating means does not operate for long enough for the electric switch to assume its stable closed position. The urging means is responsive to current carried through the contacts. It is possible to provide a plurality of switches responsive to the same urging means, different switches being provided for different electrical circuits and possibly energised from different sources.

REFERENCES:
patent: 4222020 (1980-09-01), Jameel et al.
patent: 4228412 (1980-10-01), Dalley et al.
patent: 4286241 (1981-08-01), Olivenbaum et al.
patent: 4965416 (1990-10-01), Bachmann
patent: 5019795 (1991-05-01), Patel et al.

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