Electrical switch

Details Electrical switch Electrical switch

1984-05-01

1985-11-19

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

200 11B, 200151, H01H 930, H01H 2150

Patent

active

045544204

ABSTRACT:
A rotary, snap-action electrical switch suitable for immersion in the liquid dielectric of an electrical transformer. The switch includes a multi-position operating mechanism which latches each switch position while preventing contact rebound, absorbing all closing forces in the mechanism itself. A switch position indicator follows the movable contact, and not the actuating handle. A three-position embodiment of the switch rotates one end of a pivotable contact on a stationary contact, removing contact bias means from the current path. The remaining end is selectively engageable with either of two additional stationary contacts, as well as having a non-contact open circuit position. The pivotable contact is driven at a point intermediate its ends, to increase the torque arm and thus obtain the desired operating force with substantially reduced forces between the driving member and the contact carrier.

REFERENCES:
patent: 2009383 (1935-07-01), Blume
patent: 2177109 (1939-10-01), Hill
patent: 3150243 (1964-09-01), Hermann
patent: 3330919 (1967-07-01), Kovats
patent: 3461259 (1969-08-01), Leonard et al.
patent: 3462611 (1969-08-01), McMorris
patent: 3590183 (1971-06-01), Leonard
patent: 3715543 (1973-02-01), Keto et al.
patent: 3919512 (1975-11-01), Ray et al.
patent: 4412116 (1983-10-01), Golub
patent: 4446343 (1984-05-01), Golub et al.

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