Wilbrecht Electronics, Inc.

Daryle L Petersen

John A Trine

David A Samdahl

A control switch and potentiometer assembly for use in an in-the-canal type hearing air comprising a miniature single pole, single or double throw, push-pull control switch and rotary potentiometer. The components of the control switch and potentiometer are mounted within a durable thermoplastic resin housing which is anchored within the hearing aid. A single control knob for actuation of the control switch and potentiometer is raised and shaped to permit gripping between the fingertips of the user for removing the hearing aid from the ear canal. The switch contacts and switch wiper are designed such that the process of pulling on the potentiometer control knob to remove the hearing aid will extend the control switch, thereby disengaging a normally closed switch contact and opening a battery powered circuit so as to turn the hearing aid off. A contact leg portion of a switch wiper has a projecting corner which slidingly engages a ramp section on one of the switch contacts, thereby providing an adjustable spring force which resists moving the potentiometer control knob between the extended and retracted positions.

Control switch and potentiometer for hearing aids and the like

A mounting bar assembly for versatile positioning and orientation of indicator lights such as light emitting diodes (LED's). The mounting bars are cut to a desired length to accommodate a desired number of LED's and are cut to provide a plurality of slots at predetermined, spaced LED locations. The connector leads of the LED's are inserted within the slots and adjusted in a direction generally perpendicular to the longitudinal direction of extent of the mounting bar so as to position each LED at a desired height with respect to a printed circuit board or other electrical circuit device to which the leads are connected. The connector leads are malleable, and after being secured to the mounting bar, are bent to any desired configuration so as to support each LED in a particular orientation as required.

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Eagan, MN, United States of America

Daryle L Petersen