Switch having hemispherical pivotal cover actuator for movable l

Details Switch having hemispherical pivotal cover actuator for movable l Switch having hemispherical pivotal cover actuator for movable l

1974-12-16

1976-07-20

Scott, James R.

Electrical resistors

Mechanically variable

Movable contact electrically adjustable over length of...

200 865, 200153C, 338 65, H01C 1030, H01H 314

Patent

active

039709841

ABSTRACT:
A switch construction, comprises a support base upon which is mounted a spring of hemispherical outline which includes an annular lower portion with a plurality of upstanding circumferentially spaced curved segment portions which are spaced apart at their tops to define a centering area for a top cover which is pivotal on the base. A contact member is in the form of a lever which is pivoted at one end on an upstanding portion of the base, and has an opposite engagement end which, for example, is movable along a rheostat control for the purpose of changing the setting thereof. The switch contact member is provided with a central substantially hemispherical cam portion which cooperates with a foot actuated cover and a similar cam portion defined on the cover which is located within the central part of the supporting spring.

REFERENCES:
patent: 1992929 (1935-02-01), Fator
patent: 2333814 (1943-11-01), Perkins
patent: 2424529 (1947-07-01), Wimmer
patent: 2925573 (1960-02-01), Brown et al.
patent: 2981915 (1961-04-01), Sonstegard
patent: 2988720 (1961-06-01), Voorlas
patent: 3118123 (1964-01-01), Sweet et al.
patent: 3401240 (1968-09-01), Groves
patent: 3639877 (1972-02-01), Fresard et al.

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