COLLECTING HEAD FOR A PANTOGRAPH

1. A collector head for a pantograph, comprising a bow (23) to provide contact with the catenary, and a suspension allowing resilient deflection of the bow relatively to the movable structure (3) of the pantograph in a transverse direction (YY) to the ground, said suspension comprising parallelism means to maintain the bow (23) as considered substantially in the required direction (ZZ) of displacement of the pantograph, parallel to itself during its deflections with respect to the movable structure (3), said parallelism means comprising a guide (29, 39) having a first sliding member (39) fixed to the bow (23) and a second member (29) sliding with respect to the first member (39) in the direction of resilient deflection (YY) and fixed to the top part of the movable structure (3), resilient means (43) bearing on the top of the movable structure (3) of the pantograph and urging the bow (23) towards the catenary, and guide means (49) in order substantially to lock the bow (23) relatively to the movable structure (3), in respect of rotation of an axis parallel to the direction of resilient deflection (YY), characterised in that as parallelism means the fixing of the first sliding member (39) to the bow (23) and the fixing of the second sliding member (29) to the movable structure (3) are substantially rigid in respect of rotation of axis (ZZ) parallel to the direction of advance.