Electrical distributor blocks

Claim 1

An electrical distributor block comprising a. a body of electrically insulating material having two parallel major side faces and narrow further faces extending between the said major side faces; b. a plurality of generally U-shaped channels in at least one of the major side faces, all the channels being open at both ends through a single one of the narrow faces, at least one said channel being of L-shaped cross-section transverse to its length for receiving selectively a said pin disposed with its greatest cross-sectional dimension either perpendicular or parallel to the major side faces; c. a generally U-shaped metal terminal pin located in at least one said channel and projecting from both ends thereof; d. a rib associated with each channel provided on and projecting from the major side face of the body opposite that containing the channel, said rib corresponding in shape and position to and of no greater lateral dimensions that the associated channel, whereby when two identical blocks are placed side by side the ribs of a first said block will enter the channels of the adjacent block thereby to retain said pin in said channel.