Pushbutton drive for key contacts

Details Pushbutton drive for key contacts Pushbutton drive for key contacts

1982-12-09

1984-02-14

Shepperd, John W.

Electricity: circuit makers and breakers

Electric switch details

Latches

74527, H01H 1362

Patent

active

044318812

ABSTRACT:
A pushbutton drive for key contacts is disclosed. The disclosed drive is provided with a mushroom button which is loaded by a restoring force and which includes a mushroom stem movably guided in a housing. The stem has a rest position, and an operating position detent which can be released by rotation of the mushroom button. A detent plunger spring-loaded transversely to the longitudinal direction of movement of the mushroom stem is supported in the housing. Rotation preventing edges or corners formed by intersecting surfaces are provided at the rest position to prevent rotation of the mushroom stem in the rest position. The invention makes undetected use of the switch impossible.

REFERENCES:
patent: Re24496 (1958-07-01), Cornelius
patent: 599245 (1898-02-01), Merrill
patent: 2577960 (1951-12-01), Ginard
patent: 4182943 (1980-01-01), Butterworth

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