Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Patent
1987-11-24
1988-12-06
Scott, J. R.
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
200339, H01H 2108
Patent
active
047897660
ABSTRACT:
An electrical switch construction includes a housing having an aperture therein, fixed and movable contacts in the housing, an actuator in the housing, and an O-ring in the housing. The actuator includes a substantially hemispherical portion and an actuator arm which extends outwardly from the substantially hemispherical portion and through the aperture in the housing. The actuator arm is pivotably mounted in the housing, and it is manipulatable from the exterior of the housing for moving the movable contact between a position of engagement with the fixed contact and a position of spaced disengagement therefrom. The O-ring is mounted in the interior of the housing so that it extends around the aperture therein, and so that it engages the surface of the substantially hemispherical portion of the actuator to provide a water-resistant seal between the actuator and the housing. The O-ring is maintained in uniformly pressurized engagement with the hemispherical portion of the actuator because the actuator is independently and pivotably mounted with aligned pivot pins in a section of the housing.
The above sentence has been added to the abstract to more clearly describe applicants switch structure and the components which interact with one another to provide a unique hermetic seal.
REFERENCES:
patent: 2400849 (1946-05-01), Stearns
patent: 3087341 (1963-04-01), Hults
patent: 3879592 (1975-04-01), Comerford et al.
patent: 4121071 (1978-10-01), Campbell et al.
patent: 4127754 (1978-11-01), Josemans et al.
patent: 4191387 (1980-03-01), Kirchoff
patent: 4259552 (1981-03-01), Swann
patent: 4324956 (1982-04-01), Sakakino et al.
patent: 4352965 (1982-10-01), Sorenson
patent: 4482792 (1984-11-01), Geremia
patent: 4686339 (1987-08-01), Sapone
Scott J. R.
Tower Manufacturing Corporation
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