Abstract: The manufacturing of multi-layer bi-metallic thermo-barrier material utilizing combined brazing and difussion bonding methods of joining together the components of the barrier material.

Abstract: The structure and the process for making a metallic sandwich structure in which metal worksheets, preferably made from titanium alloy, are joined in a preselected pattern by an intermittent or discontinuous weld. The joined sheets are sealed by a continuous weld to form an expandable envelope. Application of inert gas pressure to the envelope in a limiting fixture superplastically produces the sandwich structure as the expanded structure diffusion bonds to itself or other worksheets. Core configuration of the structure is determined by the intermittent weld pattern. Face sheets of the sandwich structure may be formed from one sheet of the envelope or may be inserted in the limiting fixture and the envelope expanded against the face sheets. Additionally, the face sheets may be preformed or formed concurrently with the core to produce the desired core and sandwich shape in a single operation.

Abstract: A special component strand for wire fabrics, the fabric consisting of one or more of the special strands extending in spaced apart generally parallel relation, and spaced apart, generally parallel cross wires extending transversely to the special strands, each cross wire being attached to each of the special strands at its point of intersection therewith, as by piercing said special strand or by being wrapped or twisted tightly thereabout. The special strand of the present invention consists of a spring wire core having a sheath of tough but compressible material having alternating ribs and grooves formed longitudinally in the surface thereof, the ribs permitting easy indentation of the strand by a cross wire twisted thereabout, for a more secure connection, and a pair of opposite grooves thereof reducing the strand to a relatively narrow neck for easier piercing by said cross wires.

Abstract: A sheet laminate is utilised in the manufacture of a combustion chamber for a gas turbine engine. The laminate has passages therethrough, which connect with ambient atmosphere via holes. The arrangement creates local relatively thick portions or lands which cause stress concentrations along the passages and lines of holes. Therefore pockets are machined in the rear face of each land, so as to reduce the differences in thickness of the laminate and thereby ensure the more even distribution of stresses.

Abstract: A structure particularly suited for use in aerospace industries comprising a base plate, a cover plate, and an orthogonally corrugated core including a pair of core plates formed of a superplastic alloy interposed between the base plate and the cover plate, in sandwiched relation therewith and bonded thereto, each of the core plates being characterized by a plurality of protrusions comprising square-based, truncated pyramids uniformly aligned along orthogonally related axes perpendicularly bisecting the legs of the bases of the pyramids and alternately inverted along orthogonally related planes diagonally bisecting the pyramids, whereby an orthogonally corrugated core is provided.

Abstract: A sound-suppressing panel for use on the surface of a structure adjacent which a fluid is to flow. The panel includes a top sheet (which may be conveniently referred to as a cover) and a bottom sheet, and plurality of walls which are generally perpendicular to the two boundary sheets; the walls have various orientations and intersect one another at various locations so as to form cells which are similar to well-known "honeycomb" cells. Unlike true honeycomb formed by bees, the cells of an optimum construction according to this invention are not uniform. Ideally, there are at least three different cell sizes, and the cells are intermixed (side by side) so that the fluid passing adjacent the cover will sequentially encounter cells of differing sizes. Throughout the cover are provided a plurality of linear passages which permit the fluid which is flowing above the cover to communicate with the plurality of cells below the cover.

Abstract: A turbine shroud includes a ceramic sealing layer secured to a metal substrate. In one form, the metal substrate includes a plurality of pegs extending therefrom. Intermediate bonding layers are disposed on the peg-metal substrate structure. A ceramic sealing layer of zirconium oxide with about 20 weight percentage magnesium oxide is disposed, e.g., plasma sprayed, on the intermediate bonding layers. The ceramic sealing layer includes an ordered pattern of very fine cracks therein which reduce the thermal stress in the ceramic sealing layer. A method of constructing a turbine shroud structure is also disclosed.

Abstract: A method for constructing a turbine shroud structure includes providing a metal substrate with a plurality of pegs extending therefrom. A ceramic sealing layer of zirconium oxide with about 20 weight percentage magnesium is applied to the peg-metal substrate structure. Intermediate bonding layers may be applied between the ceramic sealing layer and the peg-metal substrate structure. The ceramic sealing layer is then heat treated to a temperature of 1100.degree. C. to increase the rub wear of the ceramic sealing layer and to reduce the thermal stress therein.

Abstract: A sound attenuating panel for installation in the high velocity air flow region of an engine nacelle and/or other applications requiring sound absorbing material. The panel utilizing a single layer of either a metallic or nonmetallic cellular honeycomb core with a solid or perforated septum disposed internally therein. The septum may have a planar or non-planar configuration within the individual cells of the core thereby providing means for reducing the noise level of various sound frequencies created by a jet engine or any other sound producing devices for that matter. The invention of the planar or non-planar septum provides structural stabilization and/or vibration dampening to a bonded sandwich assembly.

Abstract: A monolayer tape for use in making up a multilayer matrix or composite which is bonded at a high pressure and temperature by pressing the composite between heated platens in air to cause densification, the tape consisting of collimated fibers held together by metal wire woven with and at right angles to the fibers, the wire being the same material as the matrix to become a part thereof when the composite is bonded. The aluminum matrix in which the fibers are embedded is provided by aluminum foils alternating with the collimated fibers in the multilayer matrix.

Abstract: The subject of the invention is a grid of precious metals for the recovery of platinum metals escaping from a catalyst during the reaction of oxidation of ammonia in the production process of nitric oxide.In the reactions conducted in the presence of the catalysts containing platinum metals at the incandesence temperature a loss in the mass of precious metals occurs, which disadvantageously effects the economy of the process.For the recovery of platinum escaping from a catalyst during the reaction of oxidation of ammonia the grids mainly used are those made of palladium-gold alloy, which, in order to increase their strength, are spot-welded into packs, or the separating grids of heat-resisting materials are used.The known methods of increasing the strength and the durability of the recovery grids are disadvantageous, as the flow of reactants through a pack of grids meets additional resistance, which causes a decrease of the process effectiveness.

Abstract: Thermal insulating apparatus for an aircraft fuselage of the type utilizing a sandwich panel construction. A foam insulation panel is provided which includes a plurality of standoffs for contacting the inwardly-facing skin of the sandwich panel. The standoffs may be arranged in a grid pattern, molded integrally with the rest of the panel, and bonded to the skin of the sandwich panel. The insulation panel may be used with or without a trim panel between it and the fuselage compartment, and in either case a sheet of metal foil may be attached to the inside face of the insulation panel. The foam may be of the self-skinning type so as to resist penetration of moisture into the foam panel and help direct condensate away from the fuselage compartment.

Abstract: Truss core panels comprising face sheets and a core, formed of adjoining tubes having an equilateral triangular cross-sectional shape, are disclosed. The face sheets are formed of either a homogeneous material (e.g., a metal, such as aluminum or titanium); or, a composite material, such as a laminate formed of bonded plies. The plies are woven from suitably strong fibers (e.g., glass or graphite), bonded together by a suitable resin. The tubes are also formed of either a homogeneous material or laminated from suitably strong fibers bonded together by a resin. Depending upon the material used, the tubes can be either formed by pultrusion or by machine winding on mandrels and cured. The tubes may be formed of the same material as the face sheets or different materials. Stiffening ribs and the like are formed by including additional layers of tubes. Further, the tubes may be filled continuously or intermittently, as desired, to accommodate fasteners.

Abstract: An assembly is formed of thin sheet metal panels, one being of undulating construction, the panels engaging each other in multiple line contact along the apexes of the undulations and the undulations affording a multiplicity of small channels extending through the assembly; the panels are then welded together by a corpuscular beam, preferably an electron beam, that effectively scans a frontal surface of the assembly, the beam being directed essentially parallel to the channels so that weld joints are formed only immediately adjacent the frontal surface.

Abstract: A lightweight composite panel for use in constructing a portable or mobile enclosure capable of resisting penetration by small arms projectiles, explosive forces and heat having a multi-layered sandwiched construction. The layers include spaced apart metal panels with a honeycomb structure filled with a subliming material, a panel of projectile resisting material, and at least one panel of yieldable thermal insulation material disposed therebetween.

Abstract: Disclosed is a cellular core structural panel, comprising a plurality of bonded stacked segments, each segment being formed from a sheet characterized by a top portion having repeating peaks and troughs and sidewalls integral with the troughs. The cut-to-length segments are successively aligned so that each peak contacts the trough of the segment above it to form a cellular core panel with integral face sheets formed from the sidewalls of each segment.

Abstract: A multiorifice structure and a method of making the multiorifice structure is disclosed herein. The structure is made by fusing a plurality of parallel rods stacked in a regular geometric pattern. The interstices between the fused rods form a plurality of small orifices of a noncircular configuration which are ideally suited for atomizing a pressurized fluid. In the preferred embodiment, the multiorifice structure is a fuel atomizer for atomizing the fuel ejected from an automotive type fuel injection valve.

Abstract: A laminated thermal insulation sheeting for covering ducts and pipes wrapped up by a thermal insulator such as glass wool and rock wool, includes an aluminum sheet and a metal network disposed on and over a surface of the aluminum sheet. A substantially transparent film of synthetic resin is placed on the metal network and has portions bonded to the surface of the aluminum sheet through interstices in the metal network. The aluminum sheet comprises aluminum foil or an aluminum-metallized film of synthetic resin, and may be lined with a backing material.

Abstract: An explosive-suppressive mass comprises layers of expanded metal of which each layer is arranged in a selected orientation so that its mesh strands are inclined with respect to the mesh strands of the layers adjacent thereto. This gives economic and other advantages in the manufacture of the anti-explosive materials.

Abstract: A layer of tubes is located in an enclosure using a device comprising a pair of parallel strips arranged one on each side of the layer of tubes in a plane transverse to the axes of the tubes, the strips being connected together by tongues which extend from a respective strip towards the other strip, the tongues being inclined to the strips and adjacent tongues of each strip being inclined in opposite directions.

Abstract: An all metal, low conductivity, high performance and relatively lightweight, composite structure, in the form of an insulation blanket is operably disposed to be exposed to a high temperature zone, e.g., a high temperature fluid, or on a supporting surface exposed to high temperature. The composite includes two metal skin members spaced from each other by a metallic member functioning as a spacing member. The spacing member is preferably deformed to contact the spaced skin sheets at spaced positions, the space between the skin sheets forming a fluid space which defines a zone of substantially reduced heat transfer by convection. When deformed, the spacing member, or an array of spacers, also provides an elongated path for conduction of heat, and defines a plurality of cavities of limited volume forming stagnant gas pockets. The skin sheets may be perforated to vent the cavities and to provide expansion space for absorbing thermal growth by the metal components of the composite.

Abstract: A core having a repetitive pattern for ribbing comprising triangles and hexagons where each side of any given hexagon is extended pinwheel fashion toward the appropriate side extensions of each of the six adjoining hexagons, all of the hexagons having sides extending to form pinwheels having the same sense, i.e., clockwise or counterclockwise. The triangles are defined by the extensions and are located between the hexagons. Panels using this core are stiff about all axes and do not have an angle of inherent weakness. The core may be stamped, rolled or vacuum-formed out of many materials including paper, cardboard, sheets of various metals and reinforced or thermosetting plastic.