Proximity detector between a metallic mass and an element to which isapplied an electric voltage

Abstract From the Canadian patent

The present invention relates to a proximity detector between a metallic mass and an element subjected to an electric voltage with an, electric circuit feeding a safety device such as the coil controlling a circuit-breaker, the feeding switch of a motor controlling the displacement of the mass, an auditory or visual alarm or an emergency grounding, said circuit including an element which is normally non conductive but made conductive when there is a potential appearing on the metallic mass to be protected, or the antenna in which said electric circuit is fed by a DC autonomous power source the conductibility of, the element whose conductibility is modified by the variation of the …