A cover plate for an electric switch, outlet or plug is provided, wherein electroluminescent sheeting provides lighted indicia associated with an opening in the plate, to convey information about the cover plate, such as the appliance with which the switch may be associated, the circuit with ...
Electrically lighted wall switch platedoi:US2580056 AWheeler Jr Thomas LUSUS2580056 * 1945年2月19日 1951年12月25日 Wheeler Jr Thomas L Electrically lighted wall switch plateUS2580056 * Feb 19, 1945 Dec 25, 1951 Wheeler Jr Thomas L Electrically lighted wall switch plate...