Electric switch utilizing coil spring torsion biasing in switch

Details Electric switch utilizing coil spring torsion biasing in switch Electric switch utilizing coil spring torsion biasing in switch

1978-11-08

1980-05-13

Pollard, Steven M.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200276, H01H 312, H01H 106

Patent

active

042030161

ABSTRACT:
A miniaturized electric switch particularly suitable for electronic keyboard control applications includes at least one coil spring having a laterally extending coil spring end contact where spring compression biases the switch toward an unoperated condition and spring torsion urges the end contact relative to a second contact and a switch housing mounted cam engages the coil spring end contact incident operation of the switch between operated and unoperated conditions to urge the end contact relative to the second contact.

REFERENCES:
patent: 3767878 (1973-10-01), Sykora
patent: 3860776 (1975-01-01), Lockard
patent: 3920943 (1975-11-01), Lapointe
patent: 3949181 (1976-04-01), Kempf

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