Abstract: A pair of forceps for marking points of contact by means of an articulating film for use in dentistry is fork-shaped with two spaced arm pairs, the arms being angled by an angle of at least 60.degree. in the end portions forming the clamps. The clamps are provided with gripping clamping surfaces.

Abstract: A collector bar adapted for utilization with carbon during the production of molten metal, such as aluminum, under Hall Heroult applications includes a one-piece metallic extruded and/or drawn tube of relatively low electrical conductivity, such as steel or ferrous metal and a one-piece rod of relatively high electrical conductivity, such as copper. The tube is in encircling relationship to the rod and the rod and tube have surfaces in intimate surfaces-to-surface contact. The rod has an exterior profile exactly complementing an interior profile of the tube, or alternately the rod is relatively elongated and narrow and opposite longitudinal edges thereof are in intimate surface-to-surface contact with parallel opposite surfaces of the tube or opposite diagonal corners of the tube.

Abstract: A universal joint tool is provided for assembling and disassembling a universal joint including its cross and bearing cups relative to a drive shaft and/or transmission shaft yokes. The tool includes first and second relatively moveable members which are moved between two positions by a threaded screw which additionally creates a force transferred by flexible cables to the cross or to a force-applying bar which includes locating surfaces for accurately inserting a bearing assembly relative to a yoke arm opening. An annular sleeve receives a gauge insert for similarly accurately locating a bearing assembly relative to an associated yoke arm opening.