Abstract: A moldable sound control composite is disclosed combining in itself when molded damping, barrier performance, and structural strength for use within a predetermined environment temperature range. As such, the moldable composite is not applied to other structures to damp their sound generation, but forms by itself a complete structural member having not only desirable sound reducing properties but desirable strength properties as well. The composite comprises a blend of a primary non-viscoelastic organic polymeric resinuous material intended to impart structural strength to the composite, a secondary viscoelastic organic polymeric resinuous material to provide damping performance, and filler material adapted to densify the composite and impart barrier performance. Optionally, at least one of the primary and secondary resinuous materials may be thermosetting.

Abstract: A reflective sheeting is disclosed having spaced apart cavities extending along one face and light-reflecting beads lining both wall and bottom portions of the cavities to impart a wide angle retroreflective response to incident light and improved brightness or intensity. The sheet is prepared by forming in a deformable carrier sheet a network of relatively depressed cavities having wall and bottom portions and spaced apart by intervening ridges, and then coating the wall and bottom portions of the cavities and the ridges with light-reflecting beads. After filling the cavities and covering the ridges with a solidified layer of a resinous organic matrix having a greater adherence to the beads than the carrier sheet has, the sheet is stripped away. This transfers the beads to the organic matrix and locates them in similarly shaped cavities and ridges molded in the matrix by the carrier sheet.

Abstract: A retroreflective marking material is disclosed comprising a sheet having at least some light-transmitting portions, a light-refracting surface on one side, and a plurality of trihedral light-reflecting units of three mutually perpendicular facets on the other side adapted to be adhered to a working site. The light-reflecting units are oriented to reflect light having relatively high angles of incidence with respect to the sheet. The marking material may be used as a tape for marking roads and is effective whether wet or dry. Optionally, the sheet or tape has light-receptors which rise above the tape and are spaced apart along one direction of the tape, and the trihedral light-reflecting units are substantially opposite the light-receptors. Preferably, the light-reflecting units have the shape of a triangular-based pyramid, and the marking material retroreflects the light in two opposite directions.

Abstract: A process is disclosed for molding a mixture of refractory particles, and especially abrasive refractory particles, and an organic resinous binder into an integral body. The mixture is preheated, preferably by microwave energy, in the absence of pressure on the mixture to a temperature elevated with respect to room temperature to insure the binder is fluid but below a temperature at which degradation or decomposition of the binder takes place. The mixture is then compacted by pressure, preferably at the preheating temperature, until a density is reached substantially equal to that desired in the finally molded integral body while still maintaining the binder in a fluid state. The resinous binder is then converted to a solid state to bind the particles one to another while still maintaining the compaction pressure on the mixture.

Abstract: A hanger is disclosed comprising spaced apart hook means that are joined by separated connecting means defining an access area or alley therebetween. One of the connecting means has an opening to provide an entrance and exit to the access area and thereby to at least one of the spaced apart hook means.

Abstract: An apparatus for treating, such as by neutralization, oxidation, or flocculation, waste liquid streams. Waste liquid and a treating substance, such as an acid or a base, are introduced through a nozzle into a chamber and then through a second nozzle into a second chamber. The effluent from the second nozzle is directed at a sensor for an appropriate property such as pH. The rate of addition of treating substance is controlled by deviations from a set point. The effluent from the second chamber is directed to a third chamber. A portion of the contents of the third chamber is removed as product and the remainder is allowed to return to the first chamber.

Abstract: A reflective sheeting is disclosed having spaced apart cavities extending along one face and light-reflecting beads lining both wall and bottom portions of the cavities to impart a wide angle retroreflective response to incident light and improved brightness or intensity. The sheet is prepared by forming in a deformable carrier sheet a network of relatively depressed cavities having wall and bottom portions and spaced apart by intervening ridges, and then coating the wall and bottom portions of the cavities and the ridges with light-reflecting beads. After filling the cavities and covering the ridges with a solidified layer of a resinous organic matrix having a greater adherence to the beads than the carrier sheet has, the sheet is stripped away. This transfers the beads to the organic matrix and locates them in similarly shaped cavities and ridges molded in the matrix by the carrier sheet.

Abstract: A process and resulting product are disclosed characterized by superimposing two layers of essentially dry, differing frit compositions onto a substrate and then firing only once to form a dual coat coherent ceramic layer. The composition of the two frits is such that the first or base coat fuses and stabilizes during the firing operation at temperatures below that at which the second or cover coat fuses and stabilizes. Desirably, the first layer forms an amorphous glass adherent to the substrate that is predominantly an alkaline oxide borosilicate glass and preferably an alkaline borofluorosilicate glass.

Abstract: Pigments are disclosed comprising zinc sulfide as a host containing in solid solution at least a sufficient amount of a metal sulfide additive or dopant to alter the color of the zinc sulfide. The dopant may comprise one or more certain metal sulfides but normally is present as a unitary sulfide, such as lithium sulfide, or preferably as a multiple sulfide, such as lithium indium sulfide and copper indium sulfide. Optionally, a binary metal compound dopant can include a metal oxide. The pigments may be prepared by encapsulating the host and dopant metal sulfides in vacuum to prevent introduction of oxides and then heating to an equilibrium temperature.

Abstract: A frit composition is disclosed adapted to be applied to a metal substrate containing iron and fired to form a ceramic coat. The frit composition comprises a primary devitrifiable frit adapted to fuse at a firing temperature and upon cooling form devitrified particles; and a secondary frit containing a volatilizable metal oxide adapted to form at a firing temperature substantially an amorphous glass and precipitate crystals of the volatilizable metal oxide. The crystals at least partially volatilize at the firing temperature to provide protective vapors effective to inhibit oxidation of the substrate. Upon cooling, the amorphous glass of the secondary frit bonds the devitrified particles of the primary frit one to another. Preferably, the devitrified particles of the primary frit provide a porous ceramic coat such as on a surface of a self-cleaning cooking device exposed to cooking residues. In this case, the primary frit may also contain an oxidation catalyst.

Abstract: A molding pin is disclosed adapted to form a light-reflecting area in a reflector having a tri-faceted forming end provided with the configuration of three adjacent facets of a rectangular parallelepiped. The three facets are mutually perpendicular to each other, and at least two of the facets are rectangular with two adjacent sides of each rectangle being unequal. In use, the pin may be combined with other like pins to form a bundle from which a reflector or reflector mold is made.

Abstract: Smoke suppressants, as distinguished from fire retardants, are disclosed for chlorine-containing resinous organic materials. The smoke suppressant comprises iron oxalate, zinc oxalate, zinc octoate, and mixtures thereof. Especially effective synergistic mixtures are a mixture of ferrous oxalate and zinc octoate and a mixture of ferrous oxalate and zinc oxalate.

Abstract: A multi-sided retroreflective body is disclosed having at least two retroreflective faces adapted to intercept light. Each reflective face is tilted in the same general direction about a lower portion angularly away from a vertical plane and is angularly related in a horizontal plane with respect to another vertical plane disposed substantially at right angles to the direction of such light. All four angles are so interrelated as to make the faces substantially optically equivalent, such that light retroreflected by the faces is directed in return paths substantially parallel to that of the intercepted light. Preferably, the reflective faces have light-reflecting units formed from three mutually perpendicular surfaces. In this case, a related advantage results in that all of the faces of the retroreflective body may be formed with the same forming tool without affecting their optical equivalence.

Abstract: An inorganic pigment and its process of manufacture are disclosed, characterized in that the pigment, in contrast to substitution of one or more metal ions into a given spinel crystal structure, is a solid solution comprising at least a double spinel structure, that is, a first cubic spinel crystal structure containing within such lattice the spinel-forming metal oxides of at least a second, differing spinel. As a result, the present inorganic multiple spinel solid solution pigments can be varied over a wide range of compositional make-up and yet, conversely, easily adjust to even slight compositional changes by varying the amounts or components of the first spinel and/or the spinel-forming metal oxides. The resulting pigments correspondingly can produce a wide range of colors and are yet capable of even small nuances of changes in color.

Abstract: A retroreflector of improved efficiency is disclosed comprising, in one form, a light-transmitting sheet adapted in use to be disposed in an angled position such that a normal to the sheet is at an angle of about 5.degree. to about 85.degree. from an incident beam of light. The sheet has front and back opposed, substantially parallel faces. The front face is substantially smooth and defines a light-refracting surface. The back face has a plurality of light-reflecting units. Each unit comprises three mutually perpendicular surfaces defining a trihedral angle of a rectangular parallelepiped and positioned with respect to the front face that the body diagonal of the rectangular parallelepiped is within an angle of 15.degree. of incident light refracted by the front face.

Abstract: A metal working compound is disclosed, especially for non-ferrous metals, adapted to be applied to the metal or to an instrument for working the metal. The compound comprises a solid fat glyceride and predominantly a triglyceride having a range of properties which uniquely adapt the compound for functioning not only as a lubricant but one which, because of its properties, remains substantially at the work area of contact between the metal and instrument and is not lost due to splattering, centrifugal action, and the like.

Abstract: A reversible, all seasonal roof utility unit is disclosed adapted to be placed in juxtaposition with other like units in covering a substantial portion of a roof. The unit comprises a sheet member, preferably slotted, having a light-absorbing color on one side and a light-reflecting color on the opposite side. Elevating means elevates the sheet member with respect to the roof to form an air space therebetween. The sheet member is adapted for reversible positioning with respect to the roof, whereby the light-absorbing colored side is directed away from the roof during the colder seasons, and the light-reflecting colored side is directed away from the roof during the warmer seasons. Optionally, the roof itself can have a light-absorbing color, and the utility unit can having a light-reflecting color and be detachably secured with respect to the roof in an elevated position.

Abstract: A two component system is disclosed for forming rigid polyester reaction products in which each component is storable for an appreciable period of time but reacts upon contact with each other to form the rigid reaction product within a relatively short time. One component comprises a pre-catalyzed polyester resin which normally has a short pot life but which is extended by an excessive amount of an inhibitor. The second component is a synergistic accelerator combination consisting essentially of a metal soap and an aromatic tertiary amine. When the two components interreact, the accelerator combination overcomes the action of the excessive amount of the inhibitor and brings about a normal polymerization of the polyester resin. Optionally, the accelerator combination is part of a fibrous reinforcement and the aromatic amine is solid at room temperatures. This enables the second component to be more readily used in a dry, handleable form for easy storage.