Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Patent
1981-03-16
1984-06-12
Shepperd, John W.
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
174525, 200305, H01H 904
Patent
active
044543980
ABSTRACT:
A miniature sealed toggle switch having a housing (2,4) that is sealed by a gasket (16) sealed to the toggle lever by a groove (12b) and RTV (18) and to the housing by a ridge (16d) and a tapered edge (2e) on the base, and by two grooves (6d, 6e, FIG. 3) on the terminals that prevent leaks under different expansion of the metal terminals (6) and the molded base (2a, 2b, FIG. 3). Contactor erosion is reduced by a drop (26d) on the contactor causing arc movement on opening. Grooves (2g, 2h) and arc shields (2f) in the base prevent formation of conductive paths. A stepped taper (12d) on the toggle lever and a tapered hole (28a) reduce wear. Nickel plating of the brass lever (12) and aluminum bushing (4a) insure ground of the lever. The contactor configuration (32c, 32d, FIG. 5), clearance between the toggle lever and actuator, and energy storage in conical spring (30) provide non-stall, non-tease operation. The radius of the actuator tips (28c) are maintained by the radius (32a, 32b, FIG. 5) in the contactor over a time period. Non-teasable momentary action with reduced bounce is provided by spring-biased plungers (36) with controlled clearance relative to the actuator slots, conical spring (30) and contactor (42, FIG. 6) configuration with energy storage points (42d, 42e). Two-way momentary action is provided two pairs of plungers (36, 38, FIG. 8). Non-tease operation is provided by the pivot (26h', FIG. 11) of contactor suspension being above the decision point (26j', FIG. 11) of the contactor. Minor modification (26g', FIG. 11, 96c, FIG. 14a) provide ON-ON-ON operation. A common metal bushing may be used with different sizes of molded cover portion.
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Aschenbach Louis F.
Brown David E.
Autio W. A.
Eaton Corporation
Grace C. H.
Shepperd John W.
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