Contact unit

Details Contact unit Contact unit

1975-08-07

1977-06-28

Hohauser, Herman J.

Electricity: circuit makers and breakers

Special application

Liquid or moisture responsive

200243, 335132, H01H 6702

Patent

active

040327353

ABSTRACT:
An electrical contact unit, for example an add-on block for detachable attachment to an electromagnetic relay itself incorporating contact sets driven by the electromagnet, comprising at least one contact set normally biased closed and means for retaining the contact set in the closed condition against an applied actuating force until the actuating force exceeds a threshold value, whereupon the contact set snaps open. The retaining means may comprise a ball bearing urged outwardly from a channel formed in a linearly-movable actuating member for the contact set and a shoulder behind which the ball bearing engages when the contact set is in the closed condition.

REFERENCES:
patent: 2868914 (1959-01-01), Gleason
patent: 3053337 (1962-09-01), Prohaska et al.
patent: 3855558 (1974-12-01), Hayward

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