Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1980-12-05
1982-07-27
Shepperd, John W.
Electricity: circuit makers and breakers
Retarded
Clock train
200 19A, 200 31A, 200283, H01H 1962
Patent
active
043419313
ABSTRACT:
The invention concerns an improvement in an electric switching device comprising at least one leaf spring mounted in curved position between the internal surface of a casing and the opposite surface of a member mounted pivotally about an axis parallel to the axis of the casing and carrying an electric contact member. The leaf spring is fixed on the internal surface of the casing by the head of a screw with a tightening nut. A stop member is interposed between the said spring end to be fixed and the said internal surface of the casing and provided with a recess of a shape complementary to the shape of the said spring end so as to lock the said spring end in the said recess, and stop means are provided integral with the said casing and comprising a flat stop surface perpendicular to the internal surface of the casing, upon which bears a planar lateral surface of the head.
REFERENCES:
patent: 1169089 (1916-01-01), Lawton et al.
patent: 2049637 (1936-08-01), Baker
patent: 2851546 (1958-09-01), Phelon et al.
patent: 2896035 (1959-07-01), Harrington et al.
patent: 2996569 (1961-08-01), Phelon
patent: 3944773 (1976-03-01), Schumacher
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