Sleeve and mobile connection for electric supply

An electrical supply device with a conduit and movable electrical connector, the device comprising:

• a plurality of conduit sections of insulating material, in which are disposed electrical conductors interconnected at junctions of the conduit sections;
• joint covers for connecting the conduit sections insulating the electrical connections of said electrical conductors;
• at least one supply box in line or at an end;
• closure caps for the ends of an electrical supply line formed by the conduit sections;
• suspensions for supporting the conduit sections;
• at least one collector carriage for taking off electrical current toward any fixed or movable receiver;
• each collector carriage being provided with brushes retained in a respective recess by gripping with a resilient device for guiding in said recess and for electrical connection;
• each conduit section of insulating material being in the form of an insulating envelope with an inverted U-shaped cross section comprising a base and two legs, for reception of the electrical conductors and for guidance of the collector carriage;
• said envelope having a hollow wall structure and being provided in its lower portion with a flexible anti-dirt joint, and on the internal surface of the base and along the internal edge of the free ends of the legs, with lateral guide surfaces for the collector carriage;
• and
• the junction between the base and the legs comprising inclined walls for improving rigidity.