Abstract: An apparatus for forming objects from a moldable material such as wax. The apparatus includes upper and lower mold pieces having upper and lower mold cavity halves attached thereto. A lever arm extends from the upper mold piece and is pivotally attached to a linear actuator. The upper and lower mold pieces are pivotably connected to one another. Movement of the linear actuator results in opening and closing of the upper and lower mold cavity halves about the pivotable connection of the upper and lower mold pieces.

Abstract: A novel method of making a ceramic core for use in casting a metal component includes freezing a ceramic slurry comprising a ceramic powder filler, a freezable liquid and a gelling agent in a mold to form a frozen core shaped body. The frozen core shaped body is removed from the mold and thawed to room temperature. A high viscosity gel is provided in the core shaped body at room temperature that is strong enough to retain the core shape until the body can be fired to form a porous, sintered ceramic core. The gel present at room temperature may be formed as the ceramic slurry is cooled in the mold cavity to form the frozen article shaped body and/or as the frozen core shaped body is thawed to room temperature.

Abstract: A reinforced ceramic investment casting shell mold and method of making such mold. The ceramic investment casting shell mold includes alternate, repeating layers of a ceramic material and a ceramic stucco defining an overall thickness of the shell mold. A fibrous reinforcing material is disposed in the alternate, repeating layers at an intermediate thickness of the shell mold. The fibrous reinforcing material has high tensile strength at elevated temperature and a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the ceramic material and the ceramic stucco. The fibrous reinforcing material is preferably woven into a twisted yarn and disposed in a generally spiral configuration.

Abstract: A method of making high melting point alloys. The reactive and non-reactive charge materials are separately refined as initial alloys, generally as an alloy of a base element selected from the iron group of the Periodic Table, such as nickel, and at least one metallic element other than the base element. At least one first initial alloy and at least one second initial alloy are provided. The metallic elements other than the base element in the first initial alloys are relatively non-reactive in the molten state, whereas the metallic elements in the second initial alloys are relatively reactive in the molten state. Amounts of the first and second initial alloys are selected to yield a predetermined composition of the high melting point alloy upon melting. The selected amounts are melted to form a molten mixture having the predetermined composition, and then the molten mixture is solidified.

Abstract: A ceramic shell mold and method of making the same. The ceramic shell mold includes a facecoat layer comprised of a first ceramic material. A plurality of alternating layers are formed overlaying the facecoat layer. The alternating layers are comprised of a second ceramic material and a third ceramic material, the third ceramic material having thermophysical properties different than the second ceramic material. The second ceramic material and the third ceramic material are preferably a zircon-based material and an alumina-based material, respectively. The resultant ceramic shell mold has a greater high temperature creep resistance than a shell mold formed solely from the second ceramic material or solely from the third ceramic material.

Abstract: The crucible includes an upstanding sidewall formed of a plurality of internally cooled, metal segments arranged in side-by side relation to form a crucible chamber for receiving the metal to be melted. The segments are separated from one another by longitudinal gaps that communicate on the inside with the crucible chamber and extend outwardly to the exterior of the sidewall. The gaps are free of packing material that could constitute a potential source of melt contamination and are so sized in a width dimension where the gap and the chamber communicate as to substantially prevent penetration of molten metal into the gaps when the metal charge is initially melted in the crucible chamber prior to the development of a solidified metal skull. Upper portions of the crucible segments are restrained against outward spreading during use to provide a crucible durable enough for use in production melting applications. The crucible eliminates the need for a CaF.sub.

Abstract: Aluminum-lithium alloy and method of investment casting an aluminum-lithium alloy including the steps of providing an aluminum-lithium alloy melt having a composition consisting essentially of about 2.0 to about 2.8 w/o lithium, about 1.2 to about 1.8 w/o copper provided that the combined lithium and copper content does not exceed 4.0 w/o, about 0.8 to about 1.0 w/o magnesium, the balance essentially aluminum, adding an effective amount of a grain refining agent to the aluminum-lithium alloy melt investment casting the melt, solution heat treating the aluminum-lithium alloy investment casting for up to 30 hours at continuously increasing temperatures to within approximately 30.degree. to 40.degree. F. of the solidus temperature of said aluminum-lithium alloy, and aging the aluminum-lithium alloy investment casting at a temperature and for a time sufficient to optimize the .delta.' precipitate size.

Abstract: A ceramic core for use in the investment casting of metals includes, prior to sintering, about 80 w/o to about 86 w/o of a ceramic filler material and about 14 w/o to about 20 w/o of a binder material. The ceramic filler material includes about 66 w/o to about 95 w/o Al.sub.2 O.sub.3 particles, about 1 w/o to about 20 w/o Y.sub.2 O.sub.3 particles, about 1 w/o to about 5 w/o of a grain growth inhibiting agent, and the balance a carbon-bearing fugitive filler material. Subsequent to sintering, the ceramic core has a microstructure characterized by the presence of substantially unreacted Al.sub.2 O.sub.3 particles having a polycrystalline composition consisting essentially of 3Y.sub.2 O.sub.3.5Al.sub.2 O.sub.3 on the surfaces of the Al.sub.2 O.sub.3 particles.

Abstract: A method of forming a fine grained equiaxed casting by melting metal and removing most of the superheat of the molten metal. The molten metal is placed in a mold and optionally subjected to turbulence whereupon it solidifies to form the casting of the desired microstructure.

Abstract: A nickel- or cobalt-based alloy of the type containing, by weight, 5 to 40% chromium, up to about 10% aluminum, up to about 10% titanium, up to about 30%, in combination, of elements from the group tantalum, tungsten, molybdenum, columbium, rhenium, or vanadium, up to about 2% silicon, up to about 5% hafnium, and up to about 5% reactive elements such as lanthanum, yttrium or other rare earths. Manganese is present in an amount from 0.1 to 12%, preferably 0.5 to 4%. Silicon in amounts from 1.0 to 2.0 by weight, or hafnium in amounts from 0.1 to 5.0% by weight may also be used. Alloys in accordance with this invention are particularly suitable for casting by the single crystal technique; however, the alloys can also be used in the production of polycrystalline components such as directionally solidified, conventionally solidified (equiaxed), wrought, or dispersion strengthened materials. In the latter case, grain boundary modifiers such as carbon, boron, zirconium and hafnium are utilized.

Abstract: A method of hot isostatically pressing a cast material by heating the material to an elevated temperature, exposing the material to a pressure below the pressure which will cause void closure in the material, subsequent to the material reaching the elevated temperature, applying a predetermined high pressure to the material, and subjecting the material to elevated temperature and pressure to densify the material without inducing significant recrystallization in the material.

Abstract: A nickel-chromium-iron alloy intended principally for automotive turbocharger applications, the alloy being characterized by good stress - rupture strength, ductility, tensile strength, etc. and containing, generally speaking, 10-15% Cr, 18-30% Fe, 3-4.25% Ti, 2.25-3.5% Al, Ti+Al from 6 to 7.25%, ratio of Ti to Al of at least 0.9 and up to 1.6, 4-6% Mo, 0.01-0.2% B, 0.03-0.3% C, balance essentially nickel.

Abstract: Disclosed is a security astragal for double door assemblies which includes a gear-toothed rod rotatably mounted in the meeting edge of one of the doors, and a rod-engaging blade mounted on the meeting edge of the other door. Both the rod and the blade preferably extend for the full height of the door. When the doors are swung relative to each other, the blade engages the teeth on the rod and rotates the rod sufficiently to enable the blade to move partly or fully past the rod. When the doors are in closed position, the blade and rod are in gear-like interengagement, making it impossible to insert a coat hanger or other jimmying tool between the two doors for manipulating the latch mechanism on the inside of the doors.

Abstract: Disclosed is an insulated metal roofing system which includes channel shaped roofing panels locked together in side-by-side relationship at the upwardly projecting edges of the channel legs by means of interlocking flanges, with legs of adjacent panels in abutting relationship. In some embodiments specially configured clip members engage the roofing panels in their regions of abutment and project downwardly therefrom. Channel shaped ceiling panels are hung in side-by-side relationship on the clip members, and part or all of the space between the roofing panels and the ceiling panels is filled with insulation. The clip members are preferably constructed to provide a selection of points of connection between them and the ceiling panels to thereby provide a selection of spacings between the roofing panels and the ceiling panels. In another embodiment, the ceiling panels are connected directly to the roofing panels.

Abstract: A nickel-base casting superalloy consisting essentially (by weight of the alloy) of 7% to 25% chromium, 02.% to 7% aluminum, 0.2% to 6% titanium, 0.01% to 0.25% carbon, up to 0.2% zirconium, up to 0.15% boron, up to 3% hafnium, at least 5% of a matrix-strengthening element selected from the group consisting of 0 to 25% cobalt, 0 to 10% molybdenum, 0 to 13% tungsten to 6% tantalum, 0 to 5% columbium, and 0 to 1.5% vanadium, a carbide shape controller selected from 0.022% to 0.15% magnesium, 0.005% to 0.

Abstract: Disclosed is a channel shaped building panel especially adapted for installation on the underside of a roofing framework. The panel has opposed upstanding webs, one of which is provided with outwardly oriented generally L-shaped female locking and mounting means, and the other of which is provided with an inwardly oriented male locking means, both locking means terminating in detent ribs. At the juncture of the female locking means with its web, an integral inwardly oriented scabbard is formed, and a complementary outwardly oriented integral blade is formed at the juncture of the male locking member with its web. Upon upward insertion of the male locking member into the female locking member, the detent ribs interact in snap fashion, and the blade seats in the scabbard. The female locking and mounting member provides a surface for attachment of a fastener to the roofing framework.

Abstract: Disclosed is a wall framing system having vertical and horizontal mullions each formed of an interior piece and an exterior piece connected together by internal plastic clips. Water diverters are mounted internally of the horizontal mullions for diverting intruded water to exit points on the exterior sides of the mullions. At the crossings of vertical and horizontal mullions, internal water diverter bridge pieces connect through the vertical mullions from the water diverter in one horizontal mullion to the water diverter in the other. The vertical mullion faces each have a height substantially equal to a coextensive with the panels they grip to facilitate glazing and reglazing. A special open channel horizontal mullion with joint forming flanges therein is disclosed, together with a novel snap lock cover system therefor. Installation of the wall system is facilitated by deep glazing pocket vertical jambs, the two piece vertical mullions, and assymetrical glazing gaskets.

Abstract: This invention is addressed to a process for the diffusion coating of metals which are capable of forming a compound or a solid solution with boron by contacting the metal with boron at a temperature greater than 1350.degree. F.

Abstract: A wall structure having a framework, for supporting a plurality of panels in horizontal and vertical alignment, the wall structure being installable in an opening of a building structure to close such opening with the panels being installable in the framework either from the exterior or the interior of the building structure. A wall structure may also be installed on the exterior of a building structure as a curtain wall. Frame members are made up of interior and exterior box-like sections, which are connected together by insulating clips, working in connecting flanges on the sections, thus providing thermal isolation of the parts. The panels are gripped by gasketed flanges on the sections. Specific proportioning of the connecting flanges and gasketed flanges provides a metal free zone facilitating deglazing and providing room for internal water diverters.

Abstract: Disclosed is a narrow frame wall structure having panel gripping mullions formed of extruded metal. Typical vertical mullions comprise a mullion proper with a glazing pocket on one side and one half of a glazing pocket on the other side, a mullion stop attached to the mullion proper after installation of a panel, and a mullion filler snap-locked to the mullion proper and the mullion stop to provide the remaining half of the second glazing pocket, thereby providing easy glazing and adequate glass bite notwithstanding the narrowness of the mullion. Joints between vertical and horizontal mullions are formed with joint pins positioned internally of the horizontal mullions on internal splines, and abutting, passing into or through, the vertical mullion, with predrilled screw holes in the pin so located that a screw hole is positioned a predetermined distance from the side of the vertical mullion in every standard location of the pin.