Abstract: A composite sheet suitable for manufacturing thermally insulating gaskets for use between an aluminum head and steel muffler of an internal combustion engine, comprising a thermally insulating refractory fiber layer disposed between a metal layer and a flexible graphite layer.

Abstract: A hot-pressed ceramic composite having good resistance to thermal shock and good erosion/corrosion resistance in molten alloys, and a method for producing said composite which comprises the blending of fused zirconia mullite with boron nitride.

Abstract: A rotary gas seal in which a first member, e.g., a tip, cooperates with a second member to inhibit gas flow therebetween, the improvement wherein, the tip is provided with a ceramic or metallic coating bonded thereto, the surface of the coating having a plurality of laser-formed depressions and providing a wear-resistant, cutting surface capable of cutting into the second member. Also, a turbine or compressor blade having a tip surface adapted to cooperate with a sealing surface to form a seal between the blade and the sealing surface and a ceramic or metallic carbide coating bonded to said tip surface, the coating having a plurality of laser-formed depressions and providing a wear-resistant, cutting surface capable of cutting into the sealing surface.

Abstract: A pipe thread sealant paste composition comprising from about 30 to about 80 percent by weight of natural flake graphite particles of a size sufficient to pass through a 100 Tyler mesh sieve and a liquid carrier comprising a mixture of mineral oil and petrolatum, the paste composition preferably having a total ash content of no greater than about 1 percent by weight and containing leachable chlorides in amounts equal to or less than about 50 parts per million. The invention also relates to a method for preparing and applying the pipe thread sealant paste to pipe joints.

Abstract: A premium coke is made by the delayed coking of a blend of pyrolysis tar and hydrotreated decant oil.

Abstract: Getter device containing a barium-aluminum alloy powder and a boron-containing, and chromium-containing nickel base alloy powder.

Abstract: A spray cooling system for cooling a furnace for the melting or treatment of molten metal, and particularly the roof and/or sidewall of electric-arc, plasma-arc and ladle furnaces. Other types of metal treating furnaces and accessory equipment may also be cooled with the system of the invention. In the invention, spray headers and pipes (14, 16, 18) supply coolant to spray nozzles (70) distributed within a coolant space in a roof structure (10) to spray coolant against the working plates (22) of the roof. The spray pipes and headers also comprise part of the framework for the roof, resulting in a simple, lightweight, one-piece structure. A pump (56) is connected to evacuate the coolant from the coolant space, and thermocouples (58) are embedded in the working plates to monitor their temperature and operate controls to adjust the flow rate so that only the amount of coolant necessary to maintain a desired temperature is supplied to the roof.

Abstract: Getter assembly having an annular channel for containing getter material, the bottom of the channel being provided with an annular, integral, groove of bulb-shaped cross-section extending into said channel to lock with said getter material.

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: A hermetically sealed electrochemical cell system of the Li/MnO.sub.2, Li/SO.sub.2, Li/C.sub.2 F or Li/CF.sub.x type having its lithium anode electronically connected to the cell housing thereby rendering the housing the anodic terminal of the cell. A terminal pin extends into the housing and is electronically insulated therefrom by a glass-to-metal hermetic seal. All metal components of the cell electronically connected to the cathode including the terminal pin and cathode collector are made of a non-ferrous metal such as molybdenum to decrease the deposition of a conductive corrosive material on the glass-to-metal seal and resulting corrosion of the seal, thereby increasing the shelf life of the cell.

Abstract: Galvanic cells of the Leclanche and zinc chloride type which employ cathode mixes having relatively high ratios of EMD to conductive material and which include a minor amount of ion exchange resin in their cathode mixes exhibit enhanced light drain service and comparable heavy drain service relative to conventional cells having lower EMD to conductive material ratios.

Abstract: A novel form of manganese dioxide is produced by heat treating lambda-manganese dioxide at a temperature of between about 250.degree. C. and about 400.degree. C. This manganese dioxide possesses an x-ray diffraction pattern indicating peaks at 3.11, 2.41, 2.11, 1.62, 1.56, 1.43 and 1.31 angstroms, and exhibits desirable electrochemical activity.

Abstract: A vitreous solid state electrolyte for solid state cell systems employing a phosphorus oxide-sulfide network former.

Abstract: A non-resealable vent closure for galvanic cells, such as nonaqueous cells, which comprises a member force-fitted within a liner disposed adjacent the wall defining an orifice and wherein a sealant is disposed between the wall defining the orifice and the liner so as to prevent electrolyte leakage at the interface of the liner and the wall defining the orifice.

Abstract: Manganese dioxide is produced from manganous salts by mixing a manganous salt with an alkali metal permanganate and/or ammonium permanganate followed by heating such mixture to about 150.degree. C. under an oxygen-containing atmosphere until at least 85% of the manganous salt is converted to manganese dioxide and then further elevating the temperature to about 250.degree. C. and maintaining this temperature until the surface area of the manganese dioxide is between about 3 square meters per gram and about 12 square meters per gram.

Abstract: An electrochemical cell employing a cathode electrode comprising an active cathode material such as MnO.sub.2, deposited on and/or in contact with a metal cathode collector such as stainless steel, and wherein the metal cathode collector has a protective layer of an oxide of the metal of said cathode collector.

Abstract: A solid state electrolyte for a solid state cell system comprising a quaternary vitreous lithium cation conductor having a conductivity of at least 0.75.times.10.sup.-4 ohm.sup.-1 cm.sup.-1 at 25.degree. C.

Abstract: Galvanic cells having at least one safety vent mechanism comprised of a thermoformed film member retained across a vent aperture located in the cover of the cell demonstrate consistent venting pressures.

Abstract: A nonaqueous cell employing a manganese dioxide-containing solid cathode having a minor amount of manganese carbonate to improve the pulse voltage capability of the cell at low temperatures such as -10.degree. C.