tension pulley

tension pulley

[′ten·chən ‚pu̇l·ē]
(mechanical engineering)
A pulley around which an endless rope passes mounted on a trolley or other movable bearing so that the slack of the rope can be readily taken up by the pull of the weights.
References in periodicals archive ?
A carabiner goes between the two ends of the line and we use a tension pulley on the bridge rocket launcher to keep the outfit tight.
The kits contain tension pulley parts for the AC idler, power steering idler and motor mounts, and are set up to travel with the engine along the assembly line.
All verticals and drapery blinds that have continuous cords will now have some kind of tension pulley or cord clip.