Abstract: Suspension device for the stringing of electric conductors and/or cables for overhead power lines, of the type comprising a suspension frame, to be anchored to a crossarm of a tower of the line, and means for the support and sliding of the conductors and/or cables, said support and sliding means comprising, for each conductor or cable, a plurality of support rollers rotating about parallel pins, said rollers being aligned one after the other along a curved trajectory and defining an ideal support and sliding surface for the conductor or cable.

Abstract: The invention relates to a system of stretching overhead electric lines, more particularly high-tension lines, according to which a pilot cord or haulage cable is positioned in conventional manner over a set of top pulleys positioned at the highest point on each pylon in the line, and is then used to pull a first haulage cable or guard cable together with at least one other supplementary haulage cable, and/or supplementary guard cable. Each supplementary cable, after passing the top pulleys on which the first haulage cable or guard cable have been laid, is slid and guided downwards until it rests on pulleys underneath. In this manner, each further haulage cable is already positioned for drawing a conductor or bunch of conductors and other haulage cables if required.