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 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.