Abstract: The presently disclosed adjustable slide knob addresses the ‘Backing-Off’ problem present with various conventional nuts. The adjustable slide knobs can be quickly positioned along a threaded rod by applying pressure to an exposed surface of a partially threaded nut. When the knob is placed against a work surface and the user releases pressure from the partially threaded nut, the thread pattern on the partially threaded nut meshes with the matching thread pattern on the threaded rod. The device can then be twisted, which will translate the device along the threaded rod, to apply a larger load to the work surface. The threaded rod may include one or more key-ways shaped to allow a locking tab housed within the knob to stop the device from freely disengaging the threaded rod to protect a user from potential injury caused by the fastener unexpectedly backing off and disengaging.

Abstract: The invention relates to converting a ball and socket style vise into a positioning vise. Jewelers and hand engravers and metal working artists utilize traditional ball vises for holding and spinning an object that is being worked on. The present invention provides a way to retrofit these traditional ball vises with a linear positioning top portion assembly.

Abstract: A hand-held vise for use by jewelers or the like comprising a pair of clamp members having jaws at one end, a fulcrum pin extending transversely between and intermediate the ends of such clamp members, and a ring surrounding the clamp members to constrain the latter to pivot about a fulcrum pin. A screw-threaded rod is connected to the fulcrum pin, and extends rearwardly therefrom between the clamp members in the direction away from the jaws. Screwed onto this rod is a handle having a tapered formation at one end engageable with the adjacent ends of the clamp member to effect a clamping action of the jaws on a workpiece.

Abstract: A gear coupling for connecting for instance a control mechanism with a motor is provided at its driven end with a disk which on its face has two segmental clamp jaws which are journalled at two diametrically opposed pivot points and by means of tension screws engaging the jaws between the pivot points can be forced in a substantially radial direction against connecting pieces of the driven part. The clamp jaws are particularly resistant to bending forces and the bending force moment during adjustment is very small.

Abstract: Disclosed is a work holder assembly for retaining jewelry articles, the work holder including a clamp assembly for clamping retention of the jewelry article, a bench mount assembly, and a gimbal-type connector coupling the clamp with the bench mount. The gimbal connector includes a ring assembly rotatably and hingedly connected with the bench mount and rotatably connected with the clamp. A filing block, interchangeable with the clamp assembly, is adapted for connection with the bench mount.