Rotary electrical contact assembly

A process for assembling a rolling electrical contact assembly, comprising:

• 1) providing at least one power transmission set comprising a first electrode and a second electrode, each electrode comprising at least one ring-shaped angled electrically conductive contact surface, the contact surfaces of the electrodes having a same first axis and the first electrode being rotatably mounted around said first axis,
• 2) providing for each power transmission set at least one roller-holder assembly comprising one roller or pair of rollers, each roller comprising a ring-shaped angled electrically conductive contact surface conformed to roll onto the corresponding contact surfaces of the first and second electrodes while the first electrode is rotating around the first axis, a shaft defining a second axis around which is rotatably mounted the roller or the pair of rollers at least one pressing device exerting a force F on said roller or pair of rollers along said shaft and mounting elements,
• 3) providing a single supporting plate having a thickness inferior to a minimal diameter of the contact surfaces of each roller or two supporting plates
• 4) mounting said at least one roller-holder assembly onto the single supporting plate onto the two supporting plates by cooperation of the mounting elements of said at least one roller-holder assembly with corresponding mounting elements of the supporting plate(s), each roller-holder assembly being mounted on the single supporting plate or in between the two supporting plates spaced along said first axis by a distance inferior to a minimal diameter of the contact surfaces of each roller, in a position wherein the second axis defined by the shaft is radial to the first axis the contact surface of the roller or pair of rollers protrudes from corresponding apertures provided in the single supporting plate or in the two supporting plates and said at least one pressing device exerts a force F on said roller or pair of rollers in the direction of the first axis to push the roller contact surface of each roller onto said corresponding contact surfaces of the electrodes,
• 5) assembling the two supporting plates to each other when two supporting plates are provided, those two supporting plates being parallel,
• 6) rotatably mounting the single supporting plate or the two supporting plates around the first axis.