Apparatus for controlling or regulating equipment powered by bat

Details Apparatus for controlling or regulating equipment powered by bat Apparatus for controlling or regulating equipment powered by bat

1991-11-22

1993-04-06

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 64, H02K 714

Patent

active

052006573

ABSTRACT:
An apparatus to control the operation of equipment powered by batteries, particularly for supplying the current to electrical equipment, such as cordless screwdrivers and cordless drills. The apparatus includes a housing, an external, displaceable trigger handle on the housing and an electric circuit with at least one power semiconductor. The function of the electric circuit being controlled preferably is a result of potentiometer adjustment through displacement of the trigger handle. The power semiconductor, which control the flow of current to the equipment motor, is disposed within the housing on a circuit board, which in turn makes contact with a heat sink, which protrudes through an opening in the housing freely to the outside.

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