Closure sprung gibbet mounted lever clamp - uses lockable ball jointed gibbet foot with clamp release effected by pedal operated cable

摘要

The arm of a tubular inverted 'L' shaped post (1) locates a lower fixed jaw (7) together with an upper jaw (6) on the free end of a rocking lever (2). A cable (17) is pinned (18) to the other end of lever, passing through the post and a base (14) to attach to a winding drum operated by a radial lever with a pedal. A coil spring (10) keeps the jaws closed, being threaded over the cable (17), and being sited in the post (1) between the rocking lever and the post base (12). The cable is sheathed between the base and a drum support, and the post can rotate and pivot by virtue of a basal ball (B) joint with a screw (16) actuated friction lock (15).