Abstract: A trolley rail housing provided with a plurality of parallel open-bottom slots extending lengthwise thereof has an electric conductor mounted up in each slot, with an end portion of the housing offset upwardly and connected by a downwardly inclined portion to the rest of the housing. An electrical pick-up unit adapted to be carried by a vehicle includes a plurality of collectors mounted for vertical and lateral movement, with spring means urging the collectors upwardly. This unit also includes a pair of laterally spaced guide members disposed above the collectors and movable laterally with them and adapted to engage the opposite sides of the rail housing when the pickup unit, separated from the housing, is moved toward its offset end.

Abstract: A trolley rail is formed from a plurality of aligned tubular housings, each of which has a front side provided with laterally spaced slots extending lengthwise of the rail, and a partition wall extending across the inside of the housing and closing the inner sides of the slots, the side walls of which are provided with grooves receiving electrical conductor bars. The partition wall and the back of the housing have pairs of aligned openings therethrough, with each pair of openings connecting with a different one of the slots. Disposed in the partition wall openings and straddling the adjoining conductor bars are U-shape metal clips with inturned free front edges in front of the bars. The clips are provided with springs or screws pressing conductor bars therein against the inturned edges of the clips.

Abstract: An extruded plastic housing of indefinite length contains an electrical conductor bar in a slot extending lengthwise of the housing. The bar is retained in the slot by a pair of ribs integral with the side walls of the slot and extending lengthwise thereof and projecting toward each other. The width of the bar is greater than the space between the ribs, but the housing is so formed that in assembling it and the bar the distance between the ribs can be increased temporarily by pressure of the bar against them to permit it to be moved rearwardly past the ribs, whereby the bar can be inserted from the front or outer side of the slot, thus permitting the use of a single conductor bar regardless of the number of housing units that may be disposed end to end to form the housing.