Abstract: A current collector line especially for electric trolley systems and the like wherein a support member is attached to the rail of the trolley system and includes an adapter interlocked with the bus bar and with the support member, and wherein the adapter is locked in engagement with the support member by flexible detents and the bus bar includes flexible portions maintaining its engagement with the adapter.

Abstract: A method of producing bearing pulleys for conveyer belts and roller gravity conveyers in which the bearing pulley includes a cylindrical portion and common central pivot pins secured to the cylindrical portion by a hub or roller base, which comprises providing a cylindrical pipe of a desired bearing pulley diameter, tapering the end portions of said pipe in a truncated configuration by non-cutting cold deformation down to the diameter of the pivot pins, and subsequently inverting the tapered end portions of the pipe centrally within the cylindrical portion of the pipe a distance sufficient to provide the desired spacing between the ends of the pulley.

Abstract: A coupling and braking device for rail supported tow cars driven by means of an underfloor chain, each car having a movable, spring loaded front fender which, upon engagement against a protruding latching device of a stop barrier or of a standing preceding car, executes an energy absorbing motion with a motion component oriented at an angle to the travel direction, making it possible to block the release of the stored energy by means of the latching device. The latter is operatively connected to the movable front fender, moving rearwardly into a protruding activated position, when the fender is deflected.