Elevation adjustment mechanism for sight

An adjustable mechanism for an archery sight is characterized by a unique elevation and tension adjustment assemblies which allow a user to quickly and easily set the sight for optimum performance. The mechanism includes an elevation bar having an elevation carriage connected therewith for sliding movement along the bar in a first direction. A windage carriage is connected with the elevation carriage for movement in a second direction, and a sight is connected with the windage carriage. The elevation bar includes a drive screw and the elevation carriage includes a uniquely configured nut releasably connected with the drive screw so that the elevation carriage can be quickly displaced relative to the elevation bar. Tension adjustment between the elevation carriage and the elevation bar is provided by a unique adjustable cam and gib assembly operable by the user. In addition, tension between the windage carriage and the elevation carriage is afforded by a uniquely configured gib of synthetic plastic material in which the tensile strength of the material provides the necessary tension.