Importance

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Abstract

A pair of insulating base halves (26,28) are adapted for mutual engagement along respective open sides, one base half (26) containing stationary contacts (30,32,34) and an electrical bussing element (30) structurally interlocked with the base half and the other base half containing a speed control circuit board (40) and electrical connectors (56,58) biased into electrical engagement with the circuit board and forming push-in lead connectors with the stationary contacts and bussing element, a movable contact carrier (38) disposed between the base halves for sliding movement and having a movable contactor (64) engaging the stationary contacts and a wiping contact (66) engaging variable resistance (44,46) elements on the printed circuit board, the two base halves being interlocked (26k,28e) together along a lower edge and retained together along an upper edge by inserting them into a hollow housing (2) containing a depressible trigger operator (4,18) the insertion effecting a driving connection (18d,38k) between the movable contact carrier and an internal member (18) of the trigger operator, the internal member having a shaft (18a) projecting through an opening (2b) in an end wall of the housing which has a seal retaining cage (2c) formed thereon around the opening (26) the internal member being retractible to position the end of the shaft (18a) flush with the end wall for permitting a seal (22) and seal retaining cap (24) to be inserted to said cage, and an exterior trigger operator member (4) affixed to the end of the shaft.

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First Claim