Abstract: A cartridge fuse carrier assembly has a housing with a recess for receiving a cartridge fuse. The fuse is held between a contact member co-operable with one end of the fuse at the bottom of the recess and a cap at the opening of the recess, the cap carrying a contact member co-operable with the other end of the fuse. The cap also carries locking means which are moved into the cap-securing position by a transverse movement of the cap relative to the recess, after the cap has been fitted into the opening of the recess. One or more wall surfaces of the recess, and adjacent surface or surfaces of the cap, define a rib and groove coupling arrangement, with the or each rib and co-operating groove being relatively displaced with respect to each other by a distance substantially equal to the length of the transverse movement.

Abstract: An electrical socket has a safety device comprising a shutter member with at least a pair of lugs engageable by respective pins of an electrical connector plug inserted into the socket. The shutter member has a rest position in which the lugs mask apertures into the body of the socket, thereby to prevent the pins from contacting electrical terminal contacts in the socket. The rest position is defined by the lugs bearing against abutments, and at least one of the lugs is also engaged by its abutment means, to arrest the shutter member in its rest position. The lugs are deflected by the thrust force thereagainst of the pins of the inserted plug, so as to be disengaged from the abutment means. The lugs have inclined surfaces so that said thrust force of the pins will cause displacement of the shutter member to unmask the apertures for insertion of the plug. The shutter member can be a rotary or a linearly displaceable member, and is spring-loaded towards its rest position.

Abstract: A novel article of manufacture for mounting interchangeable electrical units having oppositely directed projections is disclosed. The article consisting of a one-piece mounting frame formed of insulating synthetic plastic material has a row of openings extending between front and rear surfaces into each of which a unit may be inserted until arrested by an abutment provided in each opening. A frame stiffening member having recesses to receive first projections of the units while the units are being inserted into each opening extends along one side of the row of openings and faces another stiffening member located on the other side of the row and having elastic tongues which are yieldable from a first to a second position by the second projections of the units during insertion. Upon insertion, the tongues reassume their first positions, thereby retaining the units. Passages are provided in the frame for insertion of a tool to deflect the corresponding tongues and demount the units.

Abstract: A cartridge fuse carrier assembly has a housing with a recess for receiving a cartridge fuse. The fuse is held compressedly between a contact member at the bottom of the recess, and a conducting ring carried by a cap at the mouth opening of the recess. The cap carries locking means which are moved into the cap-securing position by a transverse movement of the cap relative to the recess, after the cap has been fitted to the mouth opening of the recess. One of the locking means forms an electrical connection between the mouth opening end of the inserted fuse, and a connection terminal.