Abstract: A conveyor device for conveying articles along a predetermined path of travel having a running rail on opposite sides of the path of travel. A bus bar is below said running rails. A self-propelled carrier has driving wheels to roll on the running rails. The wheels are rotated by a single electric motor which receives power from the bus bar. Cover members overhang the running rails and wheels during operation, and interlock with the rail support member so that the cover may be readily removed by disengaging the interlock.

Abstract: An overhead conveyor comprising a monorail and a carrier supported on the monorail. In the illustrated embodiment, the monorail is generally I-shaped in cross section and the carrier comprises two carriages spaced apart along the monorail having a roller adapted to ride on the top of the monorail and guide rollers adapted to engage the sides of the monorail to provide lateral stability. The two carriages are interconnected by a load beam pivotally mounted on vertical pins in each of the carriages. One of the carriages carries a drive motor for advancing the carrier along the rail and the other of the carriages provides an electrical pick-up device for taking power from trolley lines mounted on the monorail and supplying power to the drive motor.