Patent ID: 6469266
Filing Date: 2002-10-22
Classification: E01F,G08G,H01H

Abstract:
An improvement in a membrane switch assembly for embedment within a block which is formed of a resilient, rubber-like material, for use in a vehicle road sensor for signalling the passage at a vehicle over a predetermined location on a roadway, said membrane switch comprising:(I) a first member comprising (i) a non-conductive substrate, (ii) a pair of electrically-conductive stripes upon said non-conductive substrate, (iii) at least one electrically non-conductive gap separating said electrically-conductive stripes, and (iv) an electrically-conductive lead connected to each said electrically-conductive stripe; and (II) a second member comprising an electrically-conductive strip which is superposed upon said electrically-conductive stripes on said first member; wherein(III) said second member is normally out of electrical contact with said electrically-conductive stripes on said first member, but said second member being sufficiently flexible, so that, under a compressive load, it deflect to shunt across said electrically non-conductive gap, thereby to permit electric current to flow from said electrically conductive stripes to said second member.