Abstract: The drive motor of a vehicle running on an overhead rail and being drivingly coupled thereto through a drive wheel is selectively connected to and disconnected from that wheel through a coupling mechanism which is constructed for obtaining coupling and disconnection through axial movement, being in turn obtained through rotational adjustment under utilization of a control disk having axially extending pins and being part of the vehicle equipment but cooperating with stationary actuating pieces arranged along the track in appropriate positions to obtain selective connection and disconnection of the drive shaft by engaging these pins and turning the coupling mechanism in one direction or the other.

Abstract: A carriage for suspending a load such as a compartment of a vehicle or the like, is basically comprised of a pin, rod or bar from which the load is centrally suspended and which by and in itself is suspended by two wheel carriers, each supporting a wheel for running on opposite flanges of a rail; each wheel carrier has a clamping bore intersecting the bore receiving the load carrying rod and a tension pin-with-wedge is inserted in an intersecting bore for clampingly engaging the load bearing rod upon tightening of a nut on an external thread of the respective tension pin; loosening of the nuts releases a contour fitting engagement and permits the wheel carrier to be adjusted into any desired position on the load carrying rod; the wedges may be constructed as cutting edges for cutting into the load carrying rod upon tightening.