Abstract: A handle for a hand power puller includes a transparent handle having a first chamber and a second chamber, a tubular adapter engaged into the first chamber and releasably connected the handle with a tubular projection of a fork like operator of the hand power puller, a miniature flash light removably engaged into the second chamber with a sealing engaged therebetween and a rubber cap secured to the rear end of the flash light. So that the handle is waterproof and the flash light facilitates the hand power puller can be worked in darkness or in the rain.

Abstract: A tension control device is provided, for example, for locking and unlocking a movable support arm for a keyboard or the like, by engaging or disengaging rotational joints having axially displaceable rotationally lockable couplings traversed by a tension line. A control, preferably a caliper, has levers pivoted on a pin, normally biased by a spring to close. The spring pulls the caliper closed; however, the caliper is arranged by linkages to clamp tension onto the line rather than to couple spring tension to the line. A front linkage isolates the spring bias from the line when closed, by folding inwardly such that tension is transmitted substantially exclusively via compression of two pivoted members of the from linkage that align nearly parallel to the line. The biasing spring is coupled between a rear linkage that operates oppositely, and a fixed point such as the caliper pivot pin.