Abstract: A tube of a muffler for an internal combustion engine includes at least two generally rectangular sheets which are joined together at one end by crimping and wound in a tubular configuration to constitute two consecutive layers. In the tubular configuration, the other end of each of the two sheets overlaps the sheet itself and welded to the latter straddling a coupling portion where the two sheets are joined. While one of the sheets which constitutes an inner layer of the tube is made of a material which is resistive to corrosion due to chemical reactions with combustion gas and others flowing through the tube, the other which constitutes an outer wall of the same is made of a material which withstands adverse ambient conditions such as briny air and high humidity.

Abstract: A joint construction is provided for lined equipment in which mutually weldable backing plates or sheets are lined with layer or facing sheets weldable to each other but not to the backing. An intermediate metal is optionally included between the backing and layer. A channel is provided between the layer sheets overlying the joint between the backings. A bridging strip weldable to the layer sheets is disposed in the channel and welded to the respective edges of the layer sheets. In some embodiments spaced strips of the layer material are disposed under the respective edges and the bridging strip and welds are made to join the spaced strips, the bridging strip and the edges of the layer sheets.

Abstract: A seal for connecting abutting first and second elastomeric sheets having overlying metallic portions including an elastomeric strip. The elastomeric strip is bonded to the elastomeric portions of the first and second sheets. A metallic plug is attached to the metallic portion of the abutting sheets and is itself covered by a layer of flexible and abrasion resistant material which adheres to the metallic plug and the metallic portions of the abutting sheets.

Abstract: A tundlish lid is described comprising a steel baseplate and refractory insulating layer. The refractory insulating layer has embedded in it a lattice, preferably of iron or steel, which is secured to retaining members themselves secured to one surface of the baseplate. By this means the refractory insulating layer adheres well to the baseplate. A method of making the tundlish lid is also described by positively securing the lattice in spaced relation from the surface of the baseplate by securing the lattice in slots in studs or retaining elements secured to the baseplate and then applying a layer of substantially uniform thickness of refractory insulating material over the lattice.

Abstract: A sandwich-type structure comprises two external metal plates and an inner core held between the two external plates and constituted by a metallic screen netting or grid. In order to be easily stamped said structure comprises, between the plates, a layer of adhesive making the bond between the plates and the core. This adhesive is located only inside the meshes of the core, whereas the contact zones between the core and the plates are left free of adhesive. In the case where all three elements are in weldable metal, spot welding remains possible, if necessary, on the periphery or through the mass, these weld points being in this latter case sufficiently far apart to allow a geometrical deformation of the meshes of the metallic netting or grid constituting the core.

Abstract: A rubber wear layer is molded to a metal sheet, which is relatively thin, in comparison with a side rail for tensioning a vibrating screen, then attached to the side rail, as above a flange which provides a connection with the screen. The rubber layer and sheet may be wider than the width desired for the rail, in which event the wear layer and sheet are trimmed to the desired width, as by shearing. The rubber layer may also have a width less than the sheet, so as to leave a lip along one edge. The aforesaid attachment is made by pins propelled by an explosive charge through the bonded layer, the sheet and the plate at spaced positions. A head of each pin abuts the sheet and the portion which extends past the plate is removed, as by grinding. The sheet may be additionally attached to the rail by spot welds at spaced psitions on the lip, which prevents the heat of welding from adversely affecting the rubber. The lip is placed on the plate opposite the flange which connects with the screen.

Abstract: A method of manufacturing thermal barrier structures comprising at least three dimpled cores separated by flat plate material with the outer surface of the flat plate material joined together by diffusion bonding.

Abstract: Diamonds are good thermal conductors and also good insulators. They are thus exceptionally useful as heat-removing supports for small microwave circuit elements which must be electrically insulated from their ultimate heat sink. Bonding diamonds to metallic parts has been done using active metals such as titanium and zirconium in conjunction with or as ingredients in solder alloys, which then are able to wet the diamond surface and bond to it.The invention comprises a method of diffusion bonding to diamonds without a molten solder. This solves the problem of contaminating the open diamond surfaces with braze materials which produce electrical leakage. Also the bonded area is precisely limited so that the electrical properties of the circuit are not disturbed.A tiny slow-wave circuit for a traveling-wave tube has been supported by a linear array of diamonds bonded to it and to the surrounding heat-sink barrel of the tube.

Abstract: There is disclosed a reinforcing mat for use in the production of a ferro-cement structure. The mat comprises outer layers of spaced rods or wires having further layers of wire mesh therebetween. The rods or wires of the outer layers are welded together at their crossing points to secure the further layers therebetween.

Abstract: A method of making a stiffened panel including subjecting two metal sheets, at least one capable of superplastic deformation and diffusion bonding, which are positioned face to face, to a bonding and deforming process during which the sheets are joined to one another at a series of spaced joint lines across their faces, the joint lines being interrupted by non-joined regions along their lengths but being otherwise substantially continuous, and during which parts of at least said one sheet between the joint lines and the non-joined regions thereof are superplastically deformed in a mould to form a series of cavities between the two sheets, portions of at least said one sheet on respective sides of each of the joint lines and the non-joined regions thereof being moved to form sidewalls of two neighboring cavities, these sidewalls being urged to lie adjacent one another over substantial parts of their areas, so that they become diffusion bonded, one to another, to form a common sidewall of neighboring cavities,

Abstract: The composite-wall panel or case structure comprises a wall formed by at least two shaped sheets 5, 6 which have regions in which confronting surfaces are in adjoining relation and interconnected by bonding or spot welding, and regions in which hollow bodies are formed between said confronting surfaces so as to impart a required rigidity to the structure. A method is disclosed for producing said panel or case structure. Application in the automobile industry.

Abstract: A process is disclosed for bonding multi-layer sheet structure by using controlled depth laser welding. The laser energy may be applied in stages, whereby the inner sheets are first welded together and, the outer sheets are then joined thereto. The sheets are thereafter expanded to form the desired structure. Although the laser energy may be varied to control the depth of penetration, one embodiment utilizes a shield material to be applied between two sheets to prevent the laser energy from penetrating and joining the two sheets together. Similarly, shields may be used to control the width of the laser weld.

Abstract: An engine part comprises a plurality of ceramic members overlaid one on the other and including at least a first ceramic member with a front surface to be in contact with hot gas and a second ceramic member arranged behind the first member, each of the first member and the second member has a mechanical strength of more than 20 kg/mm.sup.2.

Abstract: Paired metal force-transmitting machine elements are protected against fretting corrosion under dynamic or oscillating load or stress conditions by a protection layer between pairing surfaces, whereby a direct contact between these pairing or junction surfaces is avoided. The protection layer is a material having a different composition than that of the machine elements. The protection layer is applied between the paired surfaces and to at least one of the paired surfaces. The protection layer has a different crystal structure and a lower hardness than titanium material of which the machine elements are made. The protection layer is galvanically applied and is advantageously of copper, aluminum or silver, whereby the thickness is 5-50 .mu.m. In this way the fretting fatigue durability of machine elements made completely or partially of titanium materials is greatly improved in a simple manner.

Abstract: A novel method of forming complex structures by using an accordion expansion process is disclosed. The process involves a plurality of flat workpieces of predesigned shapes and sizes that are positioned in such a manner, that after the workpieces have been first joined together, they are expanded to form high strength structural members of complex design.

Abstract: A member is secured to a supporting surface by a peripheral seam weld that partially closes off an area between the member and the surface. In the region of the or each interruption in the continuity of the seam weld, there is provided between the member and the supporting surface an insert of a material that is stable in shape at normal temperatures but that has expanded and flowed at elevated temperature, e.g. due to heating by the welding process, to complete the sealing of said area between the member and the surface, in cooperation with the seam weld.

Abstract: A composite sandwich formed by enclosing a central resilient layer of a soft compressible material between two plate-shaped parts of foamable synthetic material and inserting the assembly into a cavity formed from two shells of prefabricated sheet metal. The resultant composite is subjected to a heat treatment for about 10 minutes at about 200.degree. C. so that the foamable material expands to fill the cavity.

Abstract: The disclosed engine part uses an integral combination of a ceramic member and a metallic member, which ceramic member has a metallized layer formed on one side surface thereof, and a metallic buffer is bonded to the metallized layer so as to be disposed between the ceramic member and the metallic member.

Abstract: Disclosed is a side seam-coated welded can comprising a welded can body having a seam on the side face and a resin coating layer covering at least one surface side of the seam, wherein said coating layer comprises a thermosetting resin and a thermoplastic resin having a softening point of 50.degree. to 300.degree. C. as determined according to the ring and ball method, at a volume ratio ranging (A) from 95/5 to 25/75 or (B) from 20/80 to 1/99, and one of said two resins is present in the coating in the form of a continuous phase and at least a part of the other resin is present in the coating in the form of fine dispersed particles.This can is excellent in corrosion resistance and processability.

Abstract: A magnetic recording head may be assembled from laminar plates of ferromagnetic material which are welded together by spot welds to form a core stack. The core stack is welded by spot welds (E, F, G) to a base plate (16). The ferromagnetic material is typically an alloy of Si, Al and Fe and tends to produce stress cracks around the areas of the welds. In order to overcome this problem, the edges of the plates, at least around the areas of the welds, and provided with a layer of ductile metal such as Ni, Fe or Mo. The layer is between 5 and 500 .mu.m thick. The depth of the welds is arranged to lie substantially within the ductile metal layer.

Abstract: A panel for an elevator composed of a surface plate and a corrugated reinforcing member having ridges facing the surface plate with the surface plate and the corrugated reinforcing member being joined to each other by a room temperature curing modified acrylate adhesive of a two-part non-solvent type applied in flat layers in an unmixed condition to the entire crest of the ridges and surface portions of the surface plate facing the ridges. The elevator panel thus formed retains the adhesive in a satisfactorily cured condition with a high level of adhesive strength while providing a greatly improved level of soundproofing and damping as well as ease of fabrication.

Abstract: An expanded metal workpiece is formed from an extrusion so as to have grooves between the beads where adjacent beads are joined by web portions, the head portions of metal inserts are then inserted into the grooves at a metal to metal joining zone, and each head is retained to the metal workpiece by metal deformation.

Abstract: Two ferrous-based components are bonded together to form a bonded structure and simultaneously a layer is diffused into the surfaces of the components. The process involves first placing the components in juxtaposition, and contacting the juxtaposed components with a molten lead bath having at least one diffusing element therein. One component may be a corrugated sheet and the other may be an uncorrugated or less corrugated sheet, the sheets being in the form of helixes interposed in each other to create a substantial number of fold lines being in contact with the surface of the uncorrugated sheet. Alternately, a sheet with projections may be used in place of the corrugated sheet.

Abstract: A clad steel plate having a sandwich structure obtained by sandwiching a thin copper sheet and a stainless steel net between a plate of steel such as carbon steel, alloy steel or the like and an anticorrosive plate of metal such as titanium, tantalum, niobium, zirconium or the like, wherein the steel plate and anticorrosive metal plate are bonded to each other through the net and thin copper sheet by local welding between mutual portions to be joined. The clad steel plate can be produced cheaply and simply, and has excellent electrical and heat conductivities.

Abstract: Disclosed is a side seam-coated welded can comprising a welded can body having a seam on the side face and a resin coating layer covering at least one surface side of the seam, wherein said coating layer comprises a thermosetting resin and a thermoplastic resin having a softening point of 50.degree. to 300.degree. C. as determined according to the ring and ball method, at a volume ratio ranging (A) from 95/5 to 25/75 or (B) from 20/80 to 1/99, and one of said two resins is present in the coating in the form of a continuous phase and at least a part of the other resin is present in the coating in the form of fine dispersed particles.This can is excellent in corrosion resistance and processability.

Abstract: A panel includes metallic face sheets maintained in operative relationship with each other by a metallic core structure. The core structure consists of a plurality of securement core strips which may be internested or juxtaposed to provide a honeycomb core configuration. Structural integrity is created by the provision of internally generated welds which fasten securement portions of the core strips in operative relationship with the face sheets, but which can be terminated inwardly of the outer surfaces of the face sheets resulting in a very small volume of face sheet material being cast into a weld nugget and being heat affected and maintaining the integrity of the face sheets while, nevertheless, providing maximum structural strength and eliminating face sheet thickness limitations.

Abstract: A method of making sandwich structures from a plurality of workpieces is disclosed. The method comprises providing a plurality of workpieces, each having principal opposed surfaces. The workpieces comprise first and second outer workpieces and at least two core workpieces. Each of the core workpieces have cutout portions defining at least one strip. The workpieces are treated at selected locations to inhibit joining at said locations. The treated workpieces are positioned in a stack contacting at their principal surfaces. The workpieces are joined, preferably by diffusion bonding, at their untreated contacting surfaces such that alternate longitudinal edges of superimposed strips are joined together and to the outer workpieces. Preferably, at least one chamber is enclosed by positioning the stacked workpieces relative to a plurality of shaping members.

Abstract: A method of forming a laminated structural member and the structural member formed thereby. The method includes the steps of securing a first sheet of metal and a superimposed second sheet of metal to each other along areas on opposite edges of the sheets while leaving an area in between the secured areas unfastened. At least one bend is formed in the unfastened area of the sheets along an axis parallel to the secured edges. The concave side of the bend is located on the second sheet side of the laminate in order to stretch the first sheet through a greater distance than the second sheet is stretched by the formation of the bend. The first sheet of metal is selected for appearance characteristics and/or finish accepting characteristics which are more desirable in the completed laminate than those of the second sheet of metal.

Abstract: This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants.Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.

Abstract: Multiwall insulating sandwich panels are provided for thermal protection of hypervelocity vehicles and other enclosures. In one embodiment of the invention the multiwall panels are formed of alternate layers of dimpled and flat metal (titanium alloy) foil sheets and beaded scarfed edge seals to provide enclosure thermal protection up to 1000.degree. F. An additional embodiment employs an intermediate fibrous insulation for the sandwich panel to provide thermal protection up to 2000.degree. F. and a third embodiment employs a silicide coated columbium waffle as the outer panel skin and fibrous layered intermediate protection for thermal environment protection up to 2500.degree. F.The use of multiple panels of the present invention on an enclosure facilitate repair and refurbishment of the thermal protection system due to the simple support provided by the tab and clip attachment for the panels.

Abstract: A composite laminate capable of exposure to high temperature differentials without damage, comprising a first layer, a second layer and an intermediate web interface layer of a low modulus metallic low density structure having a high melting point. The first layer is secured to the low modulus structure directly or through an intermediate composite layer, and the second layer is bonded or secured to the intermediate low modulus layer. The thermal strains caused by a temperature differential between the first and second layers are taken up without harmful effect by the intermediate low modulus web layer.

Abstract: A welded flexible screen deck comprising a series of parallel screen rods and transverse supporting rods wherein the supporting rods are secured at the back side of the screen and have a cross-sectional profile with a substantially rectangular body portion and a rib portion resting against the screen rods such that the height h of the cross section does not exceed the width b and wherein the thickness d of the body portion is .ltoreq. h/2.

Abstract: A lead frame for mounting semiconductor chips includes laminated chip-mounting portions. These portions are comprised of a high thermal conductivity lead-frame material laminated with upper and lower surfaces of a material which matches the expansivity of the semiconductor. These upper and lower surfaces prevent warping of the mounting portions and this, coupled with the matching of the expansivity of the chip, greatly reduces the likelihood of chip damage.

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 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 thin-walled plate provided with at least one reamed hole for mounting the plate on a centering element which extends through the hole, the largest dimension of the reamed hole in one direction being smaller than the smallest dimension of the centering element in the same direction, and with at least two elongate perforations located adjacent, and at opposite sides of, the hole and spaced from the edge of the hole to define plate portions in the form of bars between the perforations and the hole, the bars being displaceable into the region of the perforations upon insertion of the centering element into the hole.

Abstract: An improved brazed construction and method for fabrication of equipment having a corrosion resistant liner on a base metal backing is disclosed, and involves incorporating symmetrical convolutions in the liner normal to the direction of maximum thermal expansion.

Abstract: A prefabricated composite metallic plate unit for transmitting heat from a heat source to a heat-absorbing medium and having a relatively high heat-transfer coefficient comprises a pair of high-tensile-strength plate members of a cobalt-nickel-iron or similar type alloy having a temperature coefficient of expansion of about 6.2.times.10.sup.-6 /.degree.C. over a temperature range of about 30.degree. C. to 550.degree. C. and a tensile strength of at least 35 kg/mm.sup.2. A plurality of holes extend through each of the plate members and have an aggregate area of about 70% of the surface areas thereof, such holes numbering about 2000 per square inch. A layer of relatively malleable metallic material is interposed between the plate members and fills the holes. Such metallic material is a metal of the group consisting of copper, aluminum, gold, silver, and an alloy of any of such metals. The resulting composite metallic plate unit has a heat-transfer coefficient of at least about 0.3 cal./cm.sup.2 /cm/sec./.

Abstract: A laminated pack comprises a plurality of uniform, closely adjacent superposed sheets and a mechanical interconnection for said sheets holding them together which comprises the pinching of a portion of the sheets themselves against one another. The interconnection is effected by slitting the sheets in areas to form teeth on each side of a hole formed through the sheet or along an edge of the sheet and by subsequently deflecting the teeth in a stacked set of sheets so that adjacent ones of the teeth move into recesses vacated by similarly deflected teeth of the next adjacent sheet and fit into the area with a pinching interengagement. The pack is formed by feeding prestamped sheets along a feed path and separating and stacking individual sheets therefrom in a direction perpendicular to the advance direction of the strip and also pinching the sheet so that teeth formations of superposed sheets bear into the next adjacent sheet to hold them together.

Abstract: An article of manufacture of a titanium reinforcing part having a grain structure to impart dimensional stability to the part at elevated temperatures is integrally joined to a titanium sheet having a grain structure to become superplastic at elevated temperatures. The completed composite titanium part is formed with the titanium sheet superplastically forming to intimately contact and to become diffusion bonded to the dimensionally stable titanium part.

Abstract: A panel includes metallic face sheets maintained in operative relationship with each other by a metallic core structure. The core structure consists of a plurality of securement core strips which may be internested or juxtaposed to provide a honeycomb core configuration. Structural integrity is created by the provision of internally generated welds which fasten securement portions of the core strips in operative relationship with the face sheets, but which can be terminated inwardly of the outer surfaces of the face sheets resulting in a very small volume of face sheet material being cast into a weld nugget and being heat affected and maintaining the integrity of the face sheets while, nevertheless, providing maximum structural strength and eliminating face sheet thickness limitations.

Abstract: A skin construction suitable for use as a high temperature airfoil surface that includes a metallic member having first and second corrugations. The first corrugations have a size and spacing which permits resilient thermal expansion of the member in a direction transverse to the direction of the first corrugations. The second corrugations are positioned in a direction that is substantially transverse to the direction of the first corrugations and the second corrugations have a size and spacing which permits resilient thermal expansion of the member in a direction generally transverse to the direction of the second corrugations.An imperforate metallic surface is integral with the metallic member. Thermal stresses imposed on the skin construction are, thus, absorbed by deformation of the first and second corrugations which act as expansion joints in permitting controlled expansion of the skin construction.

Abstract: A generally elliptical cylindrical metal substrate, and a method of construction thereof. A plate mandrel having a generally rectangular cross section is provided, and a first end of a web of metal substrate material is affixed to the plate mandrel. The metal substrate material preferably comprises alternate layers of planar metal foil and corrugated metal foil. As an alternative, a corrugated metal foil may be substituted for the planar foil. The metal substrate material web is wrapped around the mandrel, as by rotation of the mandrel while the web is fed off of a spool, until a substantially uniform thickness of metal substrate surrounding the mandrel is provided, a generally elliptical cylinder being formed. A second end of the web is affixed to a previous wrapping, thus forming a complete elliptical cylindrical metal substrate. The metal substrate is preferably catalyzed and used as a catalytic muffler or the like.

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 method for inhibiting the effects of fretting fatique in a pair of opposed titanium alloy mated surfaces through the use of a copper shim insert positioned between and in contact with the mated surfaces.

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 material suitable for making combustion chambers for gas turbine engines comprises at least two abutting sheets of perforated material, the perforation being out of alignment and interconnected by a series of channels formed on one or both of the abutting surfaces of abutting sheets. The total cross-sectional area of the perforations in at least one sheet is at least double the total cross-sectional area of the perforations in the remaining sheets or sheets per unit area.

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: This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants.Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.