Abstract: A current collector is used with an elongated, generally closed rail having a slot extending the length thereof and plural power conducting strips disposed within and extending the length of the rail, with the current collector providing power to a mobile machine. The current collector includes a wagon disposed within the rail and having plural sliding contact brushes each engaging a respective power conducting strip within the rail. An electrical connector and cable leads are connected to the wagon for coupling the sliding contact brushes to the mobile machine for powering the mobile machine. The wagon moves on first and second wheel assemblies which are detachably connected to respective forward and aft portions of the wagon and which travel over inner portions of the closed rail.

Abstract: Conductor system for warehouse cranes or transporters servicing warehouse shelving. Each shelving unit contains a conductor with conductive elements which have been mounted in a vertical plane. At least one warehouse crane or transporter and an assembly carrier is coupled respectively to a warehouse crane or transporter and a collector trolley is connected by means of opposite and preferably shaped leaf springs to an assembly plate attached to the assembly carrier of the warehouse crane or transporter. Each collector trolley contains carbon brushes and wheels. One end of the leaf springs is attached to the assembly plate and the other end of the leaf springs is attached to a mounting plate carrying the carbon brushes. The leaf springs press the wheels of the collector trolley onto the conductor and the carbon brushes of each collector trolley onto the conductor's conductive elements. Collector trolley suitable for use in such conductor systems.