Snap-action switch for alternating current

Details Snap-action switch for alternating current Snap-action switch for alternating current

1986-04-11

1987-03-03

Bryant, III, James E.

Electricity: circuit makers and breakers

Special application

Liquid or moisture responsive

H01H 2140

Patent

active

046477373

ABSTRACT:
A snap-action switch, especially microswitch for alternating current comprises at least one stationary contact (2) on a stationary contact part (1) and at least one movable contact (4) on a movable contact part (3). In order to open the switch in the proximity of the zero crossing of the switch current, on the one contact part (1; 3) there is an electromagnet unit (8) excited by the switch current while on the other contact part (3; 1) is disposed an armature unit (12) made of ferromagnetic material which is located opposite the electromagnet unit (8).

REFERENCES:
patent: 2784275 (1957-03-01), Senn
patent: 3056001 (1962-09-01), Fichter
patent: 3225160 (1965-12-01), Barkan
patent: 3284743 (1966-11-01), Spewock et al.
patent: 3449700 (1969-06-01), Gillilan
patent: 3991290 (1976-11-01), Bayles et al.

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