Method and device for power supply to an electric motor vehicle

Method of and apparatus for regulating the brush contact pressur

Mine vehicle trolley pole

Moving contact

Pick up device for pantograph

Pneumatic volume booster for valve positioner

Power collection apparatus for a transportation system

Rail-bound vehicles provided with electric current collectors

Retractable pantograph for downward withdrawal in the event of a

Rotatable electrical connector for coiled telephone cords

Set of current collecting elements used for a current collecting

Tracking pantograph for railway electrification

Trolley brush

Trolley bus head

Trolley carriage

Trolley pole

Trolley pole latch for electric mules

Trolley pole mechanism for use on electrically-powered road vehi

Trolley pole raising and lowering apparatus

Trolley pole support apparatus with variable length moment arm