Control station switch

Details Control station switch Control station switch

1977-03-03

1978-08-08

Coe, Philip R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 1V, 200242, H01H 2110

Patent

active

041058828

ABSTRACT:
A pressure actuated reversing switch for a pendant hoist control station is provided in which manually exerted pressure causes the electrical contacts to make and break in a staggered sequence. The armature of the switch is spring loaded so that pressure exerted on the armature causes the armature to move both laterally and rotationally. This complex motion permits contacts at one end of the armature to be brought into electrical contact with the leads prior to power contact being made at the other end of the armature. When pressure is released, the complex motion permits the power contacts to be broken prior to the breaking of the contacts at the other end of the armature. Additionally, the complex motion permits a self-cleaning action which assures reliability and long life.

REFERENCES:
patent: 2659838 (1953-11-01), Du Rocher
patent: 2716682 (1955-08-01), Franklin
patent: 3288947 (1966-11-01), Wanlass et al.
patent: 3408463 (1968-10-01), Wanlass
patent: 3654415 (1972-04-01), Hawkins et al.

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