Browse Prior Art Database

Locking Shroud for Trimmer Potentiometers

IP.com Disclosure Number: IPCOM000060893D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Orlandi, JV: AUTHOR

Abstract

Disclosed is a shroud for a trimmer potentiometer to lock it in position. It may be configured for reversible or irreversible applications. Trimmer potentiometers are susceptible to having their setting changed due to vibrations or rough handling. Conventionally, they are "locked" into position through use of adhesives applied to the adjusting screw and case. This method still leaves the potentiometer susceptible to being changed with little effort. The shroud disclosed in Fig. 1 solves this problem. Referring to Fig. 1, the shroud 1 is composed of molded plastic with an internal locking spline 2, a splined opening for engaging the adjusting screw knob 4 and three sets of locking tabs 3. Referring to Fig. 2, once the potentiometer adjusting screw (Fig.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 98% of the total text.

Page 1 of 2

Locking Shroud for Trimmer Potentiometers

Disclosed is a shroud for a trimmer potentiometer to lock it in position. It may be configured for reversible or irreversible applications. Trimmer potentiometers are susceptible to having their setting changed due to vibrations or rough handling. Conventionally, they are "locked" into position through use of adhesives applied to the adjusting screw and case. This method still leaves the potentiometer susceptible to being changed with little effort. The shroud disclosed in Fig. 1 solves this problem. Referring to Fig. 1, the shroud 1 is composed of molded plastic with an internal locking spline 2, a splined opening for engaging the adjusting screw knob 4 and three sets of locking tabs 3. Referring to Fig. 2, once the potentiometer adjusting screw (Fig. 5) has been set, the shroud is slipped over the top of the instrument with its internal spline locking with the external spline 6 of the potentiometer. Fig. 3 illustrates the shroud positioned over the potentiometer prior to being forced down into the position shown in Fig. 4 with the tabs 3 locking under the case of the potentiometer and the external and internal splines (6 and 2, respectively) engaged. This is irreversible and the shroud may only be removed by destroying the tabs. Fig. 5 shows a reversible shroud. The tabs 3 are positioned in a lower groove 7 of the potentiometer so the locking shroud may be conveniently removed if desired.

1

Page 2 of 2

2

[This page cont...