Current collector with a protective screen

Claim 1

A current collector, for electrical connection to a current rail having two parallel side walls with current conductors in said side walls, comprising a housing having a base plate, and a coupling member projecting axially in a given direction from the base plate and mechanically connected to the housing, said member having laterally directed electrical contact fingers arranged about the axis to make electrical contact with the current conductors of a current rail into which the collector has been inserted, wherein the collector additionally comprises a screening element mounted to the coupling member for rotation about said axis, said screening element having a bottom and two diametrically opposed wall portions extending from the bottom in a direction opposite said given direction, spaced apart and arranged such that said fingers extend between the wall portions while said collector is in a condition for inserting into the rail; and said wall portions have a width less than the distance between the rail side walls, so that upon insertion of the collector into the rail the wall portions extend between the current conductors, and upon rotation of the coupling member the contact fingers rotate from between said wall portions into a position extending laterally outward toward and into contact with said current conductors.