ADJUSTABLE RESISTOR WITH SLIDER MADE FROM ELASTOMERIC MATERIAL

摘要

The invention relates to an adjustable resistor comprising a strip of resistance material arranged on an insulating carrier and a slider made of conductive material guidable along the strip and contacting the strip, wherein the slider is manufactured from elastomeric material. A slider manufactured from an elastomeric material will, as a result of its flexibility, make contact with the resistance strip over a relatively large part of the width of the resistance strip so that the problems of an uneven current distribution associated with one-point contact are avoided. The use of an elastomeric material further provides the option of dimensioning and shaping the slider such that it can be handled easily by means of a positioning machine, and the problems of the usually elongate rigid sliders on the production line are avoided. The slider is preferably manufactured from conductive rubber or a conductive plastic. According to yet another embodiment the slider is clamped in a carriage movable parallel to the strip.