Abstract: A mounting arrangement for mounting selectively on a channel-section supporting rail with inwardly turned asymmetrical flanges or outwardly turned symmetrical flanges of different sizes, comprises a mounting foot with a row of four projections of which at least two are resilient.

Abstract: An electrical terminal comprises a U-section body, a clamping screw substantially parallel to the base of the U, and a generally L-shaped clamping member loosely located and pivotable in the body and having one arm acted on by the clamping screw for pivoting the clamping member to clamp an inserted conductor.

Abstract: A push-on insulating sleeve for electrical spade terminal sockets is of symmetrical cross-section so that it can be fitted to a socket in either of two orientations. The socket is located by symmetrical protuberances on the narrow sides at one end of the sleeve, and ratchet teeth spaced from the said end.

Abstract: An electrical distributor block comprises a narrow body of insulating material having two parallel side faces in each of which is a plurality of U-shaped channels all opening at both ends through the same narrow face of the block and each of L-shaped cross-section for receiving metal terminal pins of differing shapes and dimensions.

Abstract: An electrical connection frame comprising two spaced parallel locating members each provided with a row of uniformly spaced locating apertures, and a plurality of plates of insulating material disposed face to face between and perpendicular to the locating members, at least some of the plates incorporating electrically conductive connection strips or pins, and at least some of the plates having projections engaging respective apertures, the thickness of the plates or an integral multiple thereof being slightly less than the aperture spacing or an integral multiple thereof whereby the overall thickness of the assembly of plates is determined solely by the aperture spacing.

Abstract: A retaining member for use with clip-on terminal blocks comprising a body, with a foot portion which is adapted to rest on a plane supporting surface and is provided with a recess for engaging one edge of an outwardly flanged channel-section supporting rail or of a supporting bar, a clamping screw in the body, a clamping member positively engaged by the screw and capable of being moved thereby between positions for respectively engaging under and disengaging from the other edge of a said rail or bar, whereby the retaining member can be fitted to and removed from the rail or bar by movement transversely to the rail or bar, and a bore extending through the foot portion and accessible from outside the body for receiving a screw for screwing the body to a said plane supporting surface.

Abstract: An identification member for attachment to an uninsulated electrical terminal comprising a metal sleeve and a clamping screw consists of two plates of insulating material secured face to face by mating projections and recesses in the plates, each plate having a pair of legs with detent teeth for engaging the ends of the sleeves, and a recess to receive an identifying plate or tag, the mating faces of the plates containing matching recesses forming a bore for the screw.

Abstract: An electrical terminal comprising a rigid bent sheet metal member having a first portion provided with a projecting pivot and a second portion spaced from and generally parallel to the pivot, a cam pivotable on the pivot and having an eccentric surface facing the said second portion, and a torsion spring acting on the cam to urge the eccentric surface towards the said second portion for clamping a conductor inserted therebetween. Preferably the member is of channel section, its web forming the second portion and a flange forming the first portion. The torsion spring preferably has a helical portion which is fitted over the pivot and on which the cam is fitted, and a leg acting on the cam.