Surface covering allowing an electric receiver to be supplied with power at varying positions on the surface

A carpet tile surface covering for supplying an electric receiver with power at variable positions on said surface by means of a variable position current sensor having at least two feelers able to contact conducting strips beneath the surface covering, said feelers being in the form of metal contact needles passing through an insulating material layer forming an upper covering applied to said conducting strips, said covering being characterized in that it is in the form of ready-to-lay elements and comprising:

• (a) a fibrous layer (1, 10, 17, 24) having an upper surface forming the visilbe face of the covering;
• (b) at least one insulating material layer (2, 12, 18, 25) integrally bonded to the lower surface of the upper layer;
• (c) two assemblies means of generally flat, wide conducting strips (3, 3'-14, 14' 19, 19' 30, 30', 30"-33, 33', 33") adapted to be connected to a power supply source, these two assemblies means being fixed under said insulating material layer the said strips of generally equal width and of alternating different electrical polarities, and each of said strips in the same general plane and generally equally spaced apart from each other by a small, free gap;
• and
• (d) connecting means to provide for ensuring the electric continuity between two adjacent elements.