Calibrated electrical motor switch

In an electrical switch, the combination of a pivotally movable conductive contact plate carrying a first electrical contact, a single fixed second electrical contact disposed in the path of circuit-closing movement of said plate, a circuit element in the form of a constant-tension cantilever-mounted leaf spring maintaining its free end bearing upon and in electrical contact with said plate and yieldably urging said plate into circuit-closing engagement with said second electrical contact, second spring means yieldably urging said plate into circuit-opening position in opposition to said cantilevered spring, said second spring means having a greater force than said cantilevered spring, movable switch-actuating means interposed between and engaging said plate and said second spring means to selectively isolate said plate from the contact-opening force exerted by said second spring means and cause closing of said contacts by said cantilevered spring in response to closing movement of said switch-actuating means, and terminal connector portions provided for said fixed contact and on said cantilever spring for connecting them into an electrical circuit.