Heavy duty push-button electrical switch

Details Heavy duty push-button electrical switch Heavy duty push-button electrical switch

1974-05-13

1976-02-24

Schaefer, Robert K.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 16C, 200153V, H01H 1352

Patent

active

039405850

ABSTRACT:
A heavy duty push-button switch for the direct closing and opening of a high-current electrical circuit, such as the starter motor circuit for an internal combustion engine, comprising a casing containing at least two contact points engageable by a contactor disk mounted on a movable carriage member. The contactor disk is freely rotatable on the carriage member when the contactor disk is in transit between the contact points and a backstop. The contact points are preferably made of a silver alloy. Moreover, at least the surface portion of the contactor disk, presented to the contact points, is made of a silver alloy. The transfer of silver is equalized in both directions between the disk and the contact points. The switch preferably includes first spring means for biasing the contactor disk against the backstop. The switch has a movable push-button, and second spring means disposed between the push-button and the carriage member to move the contactor disk into engagement with the contact points, against the biasing action of the first spring means. The push-button is hollow with an opening within which the carriage member is telescopically slidable.

REFERENCES:
patent: 1132997 (1915-03-01), Apple
patent: 3172974 (1965-03-01), Perrino
patent: 3408464 (1968-10-01), Earleywine, Jr. et al.
patent: 3586810 (1971-06-01), Brown
holm, Electrical Contacts Handbook, 3rd Edition, 1958.
Holm, Electrical Contacts, 1946.

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