Richard E Tinker

US Patent:

43477585, Sep 7, 1982

Filed:

Sep 3, 1980

Appl. No.:

6/183957

Inventors:

Ronald J. Geil - Vermilion OH
Richard E. Tinker - Westlake OH
Robert A. Carmo - Placentia CA

Assignee:

Gould Inc. - Rolling Meadows IL

International Classification:

G05G 506

US Classification:

74531

Abstract:

A device is disclosed for use with adjustable rotary controls such as potentiometers to provide a means for locking the control knob and to provide varying amounts of drag force to aid in fine adjustments. A locking shoe assembly having integral locking shoes with cam surfaces is attached to the control panel with the rotary control shaft extending through its center. A locking knob with internal cams fits over the locking shoe assembly. A control knob with an integral land surface is attached to the rotary shaft, holds the locking knob in place and extends into the locking shoe assembly. Rotation of the locking knob engages the various cam surfaces thus binding the land surface and the control knob.