Trigger switch for electrical hand tool has two plastic case halves, one of which has printed circuit and carbon potentiometer track on inner face

摘要

The control (1) operates a thyristor (4) which varies the power fed to an electric motor in the handtool. The molded plastic case which is in two halves (2, 3), has electrical connections (5, 6) and attaching points (7, 8). The other electronic components of the control are stuck on the inner face of one case half together with printed circuits and carbon potentiometer track