Trimmer control mounted in potentiometer knob

摘要

A trimmer control is mounted in a potentiometer knob to provide a compact controller for use in a device such as a hearing aid. The knob of the potentiometer is rotatably attached to a base housing which has a centrally located bore. A bracket extends through the bore of the housing and into a chamber located in the potentiometer knob. The bracket is fixedly attached at one end to the housing. The trimmer control is fixedly attached to the bracket and electrical leads of the trimmer control extend through a bore within the mounting bracket for connection with another circuit. The trimmer control is accessible through an opening in the potentiometer knob.