Abstract: Electrode joint for threadably joining two abutting carbon upper and lower electrode sections is provided with a locking pin releasably held in an upper electrode section which when released engages a groove in a lower electrode section.

Abstract: Threaded nipple for joining two electrode sections is provided with an integral ridge intermediate its threads for centering the electrodes in coaxial alignment.

Abstract: The present invention resides in improved graphite nipples which are suitable for connecting graphite electrodes. The graphite nipples are prepared by adding mesophase pitch-based carbon fibers into a typical nipple extrusion blend.

Abstract: A joint for electrodes with a peg securing electrode members together produces an electrode joint of superior strength, and with resistance to thermal, and mechanical stress which tend to loosen the joint.

Abstract: A graphite separator plate for an electrochemical cell stack is formed from component parts which are joined together edge to edge. The edges of the plates are scarfed to increase the bond area and a heat activated fluoropolymer adhesive is used to bond adjacent plates together. This allows production of plates with a larger surface areas thereby improving the economics of the cell stack.

Abstract: An electrode member comprising an electrode body having cementing pitch adhered to and impregnated within at least a portion of its electrode joint surface. Also a process for producing an electrode joint comprising applying a cement which is a solution/slurry of cementing pitch in nonaqueous organic solvent to at least a portion of the mating surfaces of such electrode joint.

Abstract: An electrode joint for connecting two electrode sections together including a threaded nipple screwed into a threaded socket within the end of one electrode section is provided with a reservoir containing a cementitious bonding material comprising pitch particles and a foaming agent selected from the group consisting of sulfur, nitrated decant oil, 2,4-dinitroanoline and mixtures thereof.

Abstract: The probability of thread damage during the joining of carbon or graphite electrodes having tapered threaded projections or sockets is reduced by an improved thread configuration wherein the thread crest angle is less than the taper angle of the threaded projection or socket. In the preferred embodiment the thread crest is essentially parallel to the electrode axis.

Abstract: Connections between sections having thread sockets at the end face of carbon or graphite electrode by a double-conical threaded nipple screwed into the sockets in which the cone halves of the nipple are different in height.

Abstract: Graphite electrode for arc furnaces composed of a plurality of graphite electrode parts comprising a plurality of electrode sections connected by threaded graphite nipples, wherein at least one part of a graphite electrode has a plurality of graphite-filament yarn tensionally connected to the electrode part.

Abstract: Disclosed herein is a process for producing a carbonaceous electrode substrate for use in fuel cells, comprising two layers of a porous carbonaceous layer and a compact carbonaceous layer or three layers of two porous carbonaceous layers and a compact carbonaceous layer disposed between the two porous carbonaceous layers, wherein the porous carbonaceous layer(s) has elongated holes located nearly in the central region of thickness thereof, characterized by using high polymeric substance as a material for forming said elongated holes.

Abstract: Thread material is removed from the non-load bearing flank of a selected number of threads on each side of the center thread of a nipple to provide increased strength for an electrode joint formed therewith.

Abstract: A rotary type electrostatic spray painting device comprising a rotary shaft and a spray head fixed onto the front end of the rotary shaft. Paint is fed onto the cup shaped inner wall of the spray head. The rotary shaft is supported by a single thrust air bearing and a pair of radial air bearings. A slide plate is fixed onto the rear end of the rotary shaft. An electrode, continuously contacting the slide plate, is arranged in the housing. A negative high voltage is applied to the housing of the painting device. In addition, the negative high voltage is also applied to the spray head via the electrode, the slide plate and the rotary shaft.

Abstract: In graphite electrode joints comprising two graphite electrode ends having axial tapered end sockets and a double ended tapered thread connecting pin screwed into both of said sockets, the strength of the joint is improved by increasing the angle of the taper from the conventional 9.46 degrees to from 15 to 35 degrees.

Abstract: An apparatus for an electric furnace capable of effecting electrode connection and refractory lining repairs independently of each other. Mounted on a common supporting member are an electrode connecting device for suspending a new electrode and a refractory lining repairing device having a revolvable nozzle for blowing the refractory lining patching mixture against the eroded cavities in the lining in such a way that they may be traversed along the supporting member independently of each other. The new electrode suspended by the electrode connecting device is rotated whle being lowered so as to be screwed into the consumed electrode. The eroded refractory lining is repaired with the refractory lining repairing device.

Abstract: The threads at the ends of a nipple for joining two electrode sections are chamfered, or chamfering is incorporated on the threads at the base of the electrode sockets, to provide increased flexural strength and thermal shock resistance for an electrode joint formed therefrom.