Fuse-box safety plug for low voltage electric cable installations, standard thread, with changeable but not interchangeable fuse

摘要

176,746. Tempini, G. March 5, 1921, [Convention date]. Void [Published under Sect. 91 of the Act]. Drawings referred to in Specification, but not filed. Fusible cut-outs.-A screw-plug contains a renewable cartridge fuse of a diameter corresponding to that of a cartridge retaining tube within the plug so that unsuitable fuses cannot be employed. The end of the cartridge may have a mica window and a special preparation to indicate the melting of the fuse.