Abstract: Production hand tool equipped with pistol grip type handle for manipulating the tool at a comfortable angle including pivotal means for adjusting the angular relation of the handle in the central plane of the tool in order to optimize hand comfort in operation and relieve muscular fatigue incident to operating the tool over protracted periods at a constant angle. A male and female toroidal segment connection establishes a virtual transverse pivotal axis with handle rigidly secured by an internal clamp having cylindrical segment area bearing contact on an interior hollow connection end of the handle.

Abstract: A dental amalgam producing machine having a rotatable arm adapted to receive an amalgam mulling container at one end and having a counter weight at the other end, the arm being inclined with respect to the horizontal. A belt disposed about a non-rotating pulley is also looped about the container to hold the container on the arm against centrifugal force and to spin it on its own axis as the container is carried about the arm axis of rotation. Centrifugal force alone holds the cup on to the arm and no other mechanical locks or restraints are needed.