Fuse for flat telephone isolating plug connector - has interrupted printed circuit path bridged by fuse whose ends connect to path ends

摘要

The isolating plug is intended for line disconnection in telephone exchanges. Such isolating plug is in the form of an insulating plate with a printed circuit paths (2, 3). One conductive path has an interruption which is bridged by a fuse (8) connected to the ends (4, 5) of the respective conductive path (2). Preferably the plate has a recess (9) in the region of the interruption, over which the fuse extends. The ends of the fuse may be directly soldered to the ends of the respective path. The recess may be replaced by a through aperture in the plate, and the fuse may be provided with a cover (10') of transparent material. The fuse may be set in a glasstube, filled with sand and inserted in the recess, or aperture and glued there.