Abstract: The invention relates to a truss shoring method and an apparatus therefor utilized in the pouring of concrete floors and includes a plurality of unitary members adapted to provide vertically adjustable and horizontally movable primary modular units serving to support poured concrete.

Abstract: Prefabricated prestressed concrete members are formed on a stressing bed with a number of working stations arranged next to one another along the length of the bed. A frame froms the working stations and the frame is movable over the stressing bed. With a previously poured concrete member in one of the working stations, part of a form is placed in another working station and is filled with concrete. After the form part is completely filled and consolidated, a second form part is placed downwardly on the filled part completing the form. A lifting member on the frame which placed the second form part on the filled part is then moved to the station containing the previously poured member which is still within the form. The form is stripped from the concrete member and the frame is then moved along with the lifting member returning the stripped form to the working station where it is to be filled with concrete.

Abstract: An improved electrically conductive current collector suitable for use in high temperature applications in the presence of corrosive environments comprising: (A) a high strength, noncorrosive electronically conductive ceramic member which serves as the primary load bearing element for said current collector; and (b) a highly electronically conductive metal cladding intimately attached to a substantial portion of ore surface of said ceramic member and adapted to direct current flow through said ceramic member and to shunt said current between said member and an external contact. The disclosed current collectors are ideally suited for use as current collectors and current collector/containers for electrical conversion devices such as the sodium/sulfur battery and the like. Also disclosed are two processes for preparing tantalum or niobium doped rutile titanium dioxide.

Abstract: Off-size greenware (the product resulting from the initial gelation and filter pressing of calcareous and siliceous materials in an aqueous slurry) is recycled. The greenware is pulverized into a desirable size and combined with new calcareous and siliceous materials in the initial slurrying step. The slurry containing recycled greenware gels at an improved rate.

Abstract: A method for preparing high density yttria-gadolinia ceramic scintillators includes cold-pressing a multicomponent powder to form powder compacts and then sintering the compacts to form transparent-to-translucent ceramic scintillator bodies. The powder compacts are formed by either die pressing or die pressing followed by isostatic pressing to further increase green density. The powder compacts are sintered in vacuum or a reducing atmosphere at a temperature of between 1800.degree. C. and 2100.degree. C. The preferred heating sequence includes a holding period at a temperature lower than the final sintering temperature. The finished scintillator includes Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, and one or more of Eu.sub.2 O.sub.3, Nd.sub.2 O.sub.3, Yb.sub.2 O.sub.3, Pr.sub.2 O.sub.3, Dy.sub.2 O.sub.3, and Tb.sub.2 O.sub.3 rare earth activator oxides. The finished scintillator may also include at least one of SrO and CaO as afterglow reducers.

Abstract: A ceramic substrate for use as a semiconductor package which includes a plate member having an engraved cavity portion on a first face portion thereof and having a rounded corner on a peripheral surface opposite the first face portion and having a first and second stepped crest formed along the edge formed at the boundary of a second face portion opposite said first face portion for increasing impact resistance to chipping and cracking of the ceramic substrate. A method of manufacturing the ceramic substrate includes adding the ceramic powder to a first mold member, pressing a force applying member into the first mold member, forming on the ceramic substrate a first and second stepped crest, sintering the ceramic substrate and grinding at least one of the first and second stepped crests so as to round the at least one of the stepped crests.

Abstract: Steel, cast iron, synthetic resin or concrete pipes are coated with a hydraulically setting mass, such as cement mortar or a mixture of cement, fibers, aggregates and optional additives, by entraining the mass before it has set from a storage container having two opposite walls moving at about the same speed, one of the container walls being formed by a portion of the circumferential wall of the pipe being rotated about its longitudinal axis and the opposite container wall being formed by a tensioned carrier band having one end affixed to the rotating pipe and the mass with the covering tensioned carrier band being wound around the rotating pipe.

Abstract: A method for building a reinforced concrete structure in which column frameworks and beam frameworks each having a novel structure are assembled at a building site, and thereafter concrete is placed within column sheathing boards and beam sheathing boards around the novel column frameworks and beam frameworks, respectively.

Abstract: An unsupported form system for ceiling formworks is disclosed which comprises of three elements, i.e. extensible shores, head elements on the top of said shores and form boards to be positioned directly on the head elements. The head elements have flat supports for the boards which, for their part, have an open frame, the edges thereof cooperating with truncated pyramid noses on said supports. The boards may be suspended on the head elements of erected shores from below and may be brought into their horizontal operational position with the next shores once these have been erected. Pivotal levers are used for supporting adjacent boards between those which are supported directly on the head elements which interconnect said shores in pairs.

Abstract: A method of cyclic injection molding a thermoplastic material, utilizing a combination of a sandwich mold and an injection unit which together encompass a bifurcated feed system with a molten core. The feed system includes a channel system encompassed by the injection unit and a runner system encompassed by the sandwich mold. The feed system defines a first branch for feeding a first cooling cavity encompassed by a first parting surface, and a second branch for feeding a second cooling cavity encompassed by a second parting surface. Each cooling cavity passes through a retracted period and a protracted period which together make up its production cycle. The retracted period includes an injection period and a cooling period. The protracted period includes an opening period and a closing period. The method is characterized by the step of desynchronizing the injection period of the first cooling cavity with the injection period of the second cooling cavity.

Abstract: The disclosed ceramic rotor comprises integrally formed blade portions made of ceramics sintered at atmospheric pressure and a blade-holding portion to which said blade portions are integrally cemented by ceramic material. The blade-holding portion is made of ceramics sintered at atmospheric pressure and has a larger density than that of the blade portions. The thickness of the blade-holding portion is not smaller than the thickness of the blade portions but smaller than the distance between the front and rear surfaces of the blade portions. In the disclosed process, bodies of the blade portions and the blade-holding portion are separately formed and coupled by applying ceramic material therebetween, and the coupled bodies are sintered at atmospheric pressure to produce the ceramic rotor.

Abstract: A method for heating a riser of a molten refractory material in which after a heat molten refractory material is poured into a mold, a melt of the molten refractory material at an upper portion of the mold is directly subjected to induction heating by conducting an electric current by application of an AC voltage at a frequency of from 50 to 1,000 KHz to an induction coil with at least 2 windings around the riser portion containing said melt without induction heating the upper portion of the mold.

Abstract: A ferrite magnet and a method of producing same, wherein a mixture of magnetoplumbite type ferrite particles contained as its principal constituent and at least one of a mixing medium, an organic binder and a minute particular additive which is added with water or methyl alcohol is subjected to extrusion compacting to form compacts. The formed compacts are each subjected to at least drying, sintering, orienting and magnetizing, to produce cylindrical ferrite magnets having a plurality of magnetic poles on the surface. To impart anisotropy to the magnets, at least one pulse magnetic field may be applied on the surface of each compact formed by extrusion compacting, and the oriented compact may be magnetized in the same direction as the direction in which the anisotropy has been imparted.

Abstract: Method and apparatus for forming particles into shaped preforms by confining the loose particles in a shaped closure having at least one moveable side, subjecting each particle of the mass and at least a portion of the mold to an acceleration of a magnitude of at least 25 to 50 G's, and preferably in the range of 500 G's to 5000 G's, or greater, to generate at each particles a force causing such particle to impact with adjacent particles and form a homogeneous, fused article, and articles so formed.

Abstract: Lightweight gypsum wallboard produced by continuously combining a small amount of surface active agent with a liquid stream, which stream is made up of substantially all of the water to be used in the manufacture of a continuous web of gypsum wallboard, passing this mixture through a long cylindrical static mixing tube filled with one inch ceramic saddles, while adding a controlled quantity of air thereto, then passing the mixture through a shorter cylindrical static mixing tube of equal diameter filled with 3/8 inch ceramic Raschig rings, forming a uniformly dispersed foam of very small bubbles from the liquid by completely generating all of the surface active agent therein to form this foam, and mixing this foamed liquid with finely ground dry calcined gypsum in a suitable mixing device to form a foamed settable gypsum slurry, disposing the slurry between paper cover sheets, and forming a continuous web of gypsum wallboard.

Abstract: Bodies of silicon nitride are produced by enclosing a silicon nitride powder in a gas-tight glass casing and subjecting the casing to isostatic pressure using gas as a pressure medium at a temperature of at least 1600.degree. C. and a pressure of at least 100 MPa. The casing is a glass having a high softening point. The casing is evacuated and sealed before compressing. The product may be pre-formed by isostatic compacting at a pressure of at least 100 MPa at a temperature considerably below the sintering temperature. The casing is cooled at a rate of at most 1000.degree. C. per hour and at a pressure of not over 10 MPa.

Abstract: A method for manufacturing porous shaped articles, such as flat or channel shaped insulation plates, blocks and similar building elements, in particular for building completely insulated houses, the articles obtained by this method and building constructions erected from these articles, in which method spheres of expanded porous resinous foamed material are blended with a binder, comprising a mixture of a bituminous product, and waterglass with a waterglass content of at the most 75% by weight, while at the end of this blending operation a quantity of particulate or powdery material including an additive such as sand is added to and co-blended with said blend until the mass again consists mainly of loose spheres, whereupon cement is added to the blend and the entire mixture is subjected again to a second mixing operation, while metering a quantity of water, and the mixture thus finally obtained is formed into the desired articles by compression and vibration followed by drying said articles in a self-supporti

Abstract: A form for supporting from below a layer of concrete during pouring and hardening has several square or rectangular panels having neighboring marginal portions with downwardly extending reinforcing skirts which are separably connected to each other by bolts. The panels rest on props which must be removed prior to separation of the panels from each other. In order to dismantle the form in the space below the hardened concrete layer, the props for one of the panels are removed and a dismantling device is separably coupled to a panel which is adjacent to the one panel. The dismantling device has a socket below the skirt of the one panel and the one panel is thereupon detached from the panel which carries the dismantling device so that the skirt of the one panel descends into the socket. The one panel is then pivoted with reference to the socketed part of the dismantling device so that its upper side moves away from the underside of the concrete layer.

Abstract: Rigid shaped articles of expanded inorganic aggregate, such as expanded perlite, bonded with calcium silicate hydrate and preferably reinforced with fibers, are made by mixing a hydrothermally reacted gel of calcium silicate hydrate crystals with the expanded aggregate, shaping and drying, without treatment with saturated steam after the gel and aggregate have been mixed.

Abstract: To produce ceramic lithium nitride as solid electrolyte for galvanic lithium cells, Li.sub.3 N powder is first stirred together with molten Li-metal serving as binder, in a noble gas atmosphere. After cooling, the mixture is pressed into a shaped body and the shaped body is then sintered in nitrogen at temperatures of about 700.degree. C. This causes the Li-binder to also become transformed into Li.sub.3 N. The binding with lithium also makes the powdery starting material suitable for rolling, and shaped bodies such as tablets can be cut out of the ductile rolled product with high precision.