Abstract: A drive mechanism including a first member and a second member is provided. The first member defines a first member axis of rotation. The first member has a first member surface. The second member defines a second member axis of rotation. The second member has a second member surface. The first member surface of the first member is in intimate contact at a contact zone with the second member surface of the second member. The contact zone defines a plane extending substantially through the first member axis and the second member axis, whereby the force transmitted by the drive mechanism is substantially tangential to the axes of said members.

Abstract: A string mounted rear bow sight includes a body with a bowstring hole, and a bifurcated rod extending forward from the body to straddle the bowstring and enclose it within the bowstring hole. A fluoresent material is mounted on the body to absorb ultraviolet light and emit a brilliant fluorescent light. An elastic sight orienting tube is connected to the bow and to the bifurcated rod to orient the rear sight toward a front sight on the bow, and to pull the rear sight upward on the bowstring against a preestablished fixed point thereon when the bowstring is drawn.