Patent ID: 6361185
Filing Date: 2002-03-26
Classification: F21S,F21V,F21W,H01H,H01K

Abstract:
A safety lamp string comprising:a) an electrical plug; b) a first power supply wire extending from the plug; c) a plurality of lamp sockets connected in series to the first power supply wire including a first lamp socket and a last lamp socket, the first lamp socket being located closest to the electrical plug of the plurality of lamp sockets; d) a second power supply wire extending directly between the electrical plug and the last lamp socket; e) a single protective bulb socket connected solely to the first power supply wire between the electrical plug and the first lamp socket; and, f) a protective bulb located in the protective bulb socket and comprising: two wires having ends located within the protective bulb with a glass bead maintaining the two wires spaced apart from each other; and a fuse connected between the ends of the spaced apart wires, whereby the fuse protects against overloading and over heating of bulbs located in the plurality of lamp sockets.