Terminal seal for electric switch

Details Terminal seal for electric switch Terminal seal for electric switch

1982-12-15

1984-10-09

Shepperd, John W.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

H01H 904

Patent

active

044763603

ABSTRACT:
A terminal seal for an environmentally sealed electric switch is reduced in cost while maintaining an effective seal by eliminating the O-ring and instead angularly reshaping the lower annular surface (20d) of the stationary contact head (20c) and the lower annular surface (28d) of the contact support rivet (28) to coact with the reversed radii (R1, R2) surface of the terminal hole (14, 18) in the molded nylon base (2). Such coaction, when the stationary contact (20) or the contact support rivet (28) is clamped in place and riveted to the external terminal (24, 32), causes cold flow of the radius (R1) along the reshaped angular surface (20d, 28d) to provide an effective seal without the need of an O-ring or other packing material or cement.

REFERENCES:
patent: 105031 (1870-07-01), Boyd
patent: 928947 (1909-07-01), Dawson
patent: 1401573 (1921-12-01), Wood
patent: 2954452 (1960-09-01), Neumann
patent: 3035134 (1962-05-01), Hults
patent: 3222467 (1965-12-01), Meyer
patent: 3322914 (1967-05-01), Puccini
patent: 3821029 (1974-06-01), Smith
patent: 4268734 (1981-05-01), Sorenson

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