Importance

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Abstract

A snap action switch apparatus includes a snap action element that couples a handle to a switch contact apparatus having movable switch contacts so movement of the handle causes movement of the switch contacts. The snap action element may include two rotatably mounted arms that are coupled by a resilient member. One or more plates may shield the resilient member from one or more of the arms, e.g., to prevent mechanical interference during switch operation. The handle and movable contacts may have different ranges of motion, such as 90 degrees and 45 degrees, respectively, to provide verifiable and fast acting switching. The plates or other elements may provide an auxiliary bearing surface for the arms to provide more reliable operation.

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First Claim