A clamp for supporting optical and photographic equipment

摘要

In a clamp with fixed jaws (2, 3), a member (5) with a threaded rod (15) mounted in one of the jaws has part of its thread engaged removably by an internally threaded sector (22) which is movable between an inoperative condition in which the rod (15) is free to slide relative to the jaw and an operative condition in which the rod (15) is in screwing engagement with the internally threaded sector (22).