Browse Prior Art Database

Locking Collar for Rotatable Shaft Control

IP.com Disclosure Number: IPCOM000044784D
Original Publication Date: 1984-Aug-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bistline, WR: AUTHOR [+2]

Abstract

This locking collar may be easily fastened around a rotatable shaft, such as the shaft of a panel-mounted potentiometer, to prevent rotation of the driven element. The collar may be removed for shaft adjustment and then replaced.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Locking Collar for Rotatable Shaft Control

This locking collar may be easily fastened around a rotatable shaft, such as the shaft of a panel-mounted potentiometer, to prevent rotation of the driven element. The collar may be removed for shaft adjustment and then replaced.

Figure 3 shows a panel-mounted potentiometer including rotatable shaft 21 which passes through stationery housing 23 and is connected to rotate wiper element 22. In certain applications of such a potentiometer it is desirable to adjust and lock the potentiometer into position during manufacture or field service of the circuit in which the potentiometer is installed.

The plastic collar in Figs. 1 and 2 consists of two semicircular sections joined by a "living" hinge 33. When closed, the collar forms two grooved chambers. The larger chamber 31 encloses barrel 25 of the potentiometer shown in Figure
3. The smaller chamber 32 meshes with the serrated shaft knob 24 of the potentiometer in Figure 3. The pitch of the grooves on shaft knob 24 is equal to the pitch of the serrations in the chambers of the collar. By tightening a screw through the tapped hole 34, the two halves of the collar are locked around barrel 25 and knob 24. The diameter of chamber 31 is slightly smaller than the diameter of barrel 25 of the potentiometer to ensure a forced fit.

Disclosed anonymously

1