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: A method for stringing high tension power lines on a set of towers, comprising the steps of: mounting a first pulley generally on the top of each tower; mounting at least a second set of pulleys suspended form the insulators beneath the first pulley on each tower; mounting rolling guide means above each crossarm of each tower; mounting second guide means connecting the tip of each crossarm to each one of said second set of pulleys; disposing a first cable on each of the first pulleys; attaching said first cable to a first spreader connecting member carrying at least second and third cables; drawing said first cable past said first pulleys; and drawing the first spreader connecting member over the first pulleys while concurrently guiding at least one of said second and third cables generally downwardly along the rolling surface of said rolling guide means onto the sliding surface way of said second guide means and into the central groove of one of said second set of pulleys. Apparatus to carry out said method.

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.