Abstract: A safety structure to prevent a socket from being over-heated in a lamp string, which comprises a separate lamp string made of a pre-determined number of sockets connected in series. The power-supply wire of the lamp string is connected in series with an additional socket to be plugged with a protective bulb. Two copper wires mounted in the glass tube of the protective bulb are fixed in place by means of a positioning bead. The tail ends of the two copper wires are connected with a fuse having a pre-determined power dissipation. In case of the fuse in the protective bulb being over-loaded, the fuse will be burned out automatically so as to prevent the sockets from being over heated to cause a hazard.

Abstract: Ornamental lamp strings in a network structure, having a main power-supply cable and a plurality of lamp strings. The plurality of lamp strings all have the same length and the same number of sockets spaced apart a common distance. The odd-numbered sockets of one lamp string are connected to the even-numbered sockets of an adjacent lamp string by a knitting cord without copper wire so as to have all the lamp strings knitted into a network.

Abstract: A knitting structure of power-supply wires in ornamental lamp, which mainly comprises several lamp strings in parallel to form into a large net-shaped ornamental lamp; the sockets of every lamp string are connected, in series, with a plurality of short power-supply wires to form into a single-wire lamp string; the short power-supply wires in each single-wire lamp string are twisted together with a knitting cord from the first socket to the last socket thereof so as to form into a lamp string assembly having a better tensile strength.

Abstract: An improvement of water-draining passage structure of a lamp set for ornament, in which a bulb base has a bulb hole for receiving a bulb; the outer part thereof has a cylinder body with two parallel vertical flats, and the center between the two vertical flats has an elongate channel with a rectangular hole extended through a water-proof rim and to the outer edge of the bulb hole; between the elongate channel and an upper groove of the rectangular block, there is a groove extended to the bottom of the bulb hole; the socket has a guide groove, of which the wider flat surface is furnished with a longitudinal groove; the longitudinal groove has an oblique wall surface nearing the rectangular groove of the bulb base; by means of the wall surface extended to the bottom thereof and the groove on the shoulder part of the bulb base, a continuous passage is formed for draining off water.