| 摘要 |
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.
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