Abstract: A method of platinizing and heat treating tantalum metal is described. The platinizing of tantalum is accomplished by placing a piece of conductive corrosion resistant metal and a tantalum workpiece as electrodes in a platinizing solution. The electrodes are connected to a source of DC power supply and when the current is passed, platinum black is deposited on the tantalum workpiece. The platinized tantalum workpiece is then placed in a furnace maintained at a temperature of about 1050.degree. to 1150.degree. C. for a time sufficient to diffuse the coated platinum into the surface of the tantalum core. The method of using the electrode for the detection of faults in a glass lined apparatus is also disclosed.

Abstract: The application discloses a multi-row plow adapted to be towed behind a small walking tractor. The plow comprises a draft frame having a pivotal attachment to the tractor and a tool frame. At the rear of the tool frame there is a ground engaging wheel. Apparatus is provided to change the elevation of the wheel relative to the draft frame, thereby to adjust the elevation of the rear end of the draft frame. Linkage causes the forward end of the tool frame to be raised when the rear end of the draft frame is raised, and vice versa. The foregoing provides a simple and labor-saving way of removing the tool from the ground at the end of the row for turning the apparatus around.

Abstract: A combination process sensor for use in electrically non-conducting lined steel vessels has a tantalum body containing a temperature sensitive element. One end of the body is positioned to be in contact with a product undergoing a process in the tank. Upon this end of the body there is fabricated an electrode, which allows the galvanic sensing of any faults which may occur in the glass lining.