Abstract: Laminates of reinforced plastics and copper foil are prepared with a small quantity of benzotriazole in the plastic ingredient. The resulting laminate has excellent bond between the plastic and the copper foil and hence can be employed as an electrical circuit board.

Abstract: A metal cellular decking section comprising a fluted upper element and a lower element secured to the upper element along contiguous portions thereof. At least one longitudinally extended expanded metal zone is provided in the lower element. The upper element may include a formation defining a channel which extends parallel with the expanded metal zone and which presents an opening adjacent to the expanded metal zone. In the present metal cellular decking section, the expanded metal zone promotes mechanical bonding of subsequently applied fireproofing material to the underside of the lower element; increases the coverage width for a given steel girth; and provides access to the channel for attachment of hanger means. A method of fabricating the present metal cellular decking section is disclosed.

Abstract: A piezo electric transducer employs a stack of piezo electric crystals interposed between electrodes and maintained under compression to develop an electrical charge which instantaneously corresponds to the acceleration of the device. One or two electrical resistors in series with the piezo electric crystal stack output develops a charge which instantaneously corresponds to the velocity of the device. The velocity responsive charge is delivered to a charge converter which may be located remotely from the piezo electric transducer. The charge converter generates an electrical signal having a voltage which is proportional to the instantaneous velocity of the device. The assembly permits use of high-sensitivity piezo electric crystals.

Abstract: An impact-resistant wall structure is fabricated from two types of sheet metal cellular panel units and concrete columns which are enclosed thereby. Inner sheet metal cellular panel units are secured to outboard members of a building framework. Outer sheet metal cellular panel units are secured outboard to the inner sheet metal cellular units with the cells of the inner units perpendicular to the cells of the outer units. The inner sheet metal cellular units cooperate with the outer sheet metal cellular units to provide total peripheral metal enclosure for concrete columns. The outer sheet metal cellular units are fastened to the inner sheet metal cellular units at contiguous points preferably by means of threaded fasteners which extend into the concrete columns. Reinforcing rods positioned within the cells of certain or all of the panel units provide increased tension reinforcement, increased shear resistance, and produce local damage to impacting missiles.

Abstract: Useful copolymerizable compositions include 10 to 50 parts by weight of (I) a polymerizable diurethane monomer having the general formula ##STR1## wherein R.sub.1 is --H; or --CH.sub.3 ;R.sub.2 is --H; --CH.sub.3 ; or --C.sub.2 H.sub.5 ;R.sub.3 is an organic radical constituting the residue of a mono-hydroxy compound R.sub.3 OH having from one to twelve carbon atoms; andR.sub.4 is a divalent organic radical constituting the residue of an organic diisocyanate R.sub.4 -(NCO).sub.2 from which the two isocyanate radicals have been removed;And 90 to 50 parts by weight of (II) a polymerizable polyurethane monomer which is the reaction product of (a) an organic diisocyanate; (b) a beta-hydroxy alkyl ester of an acrylic acid; and (c) a polyol.

Abstract: Semisolid polymerizable compositions are obtained by combining unsaturated polyester resin syrup, aqueous sodium silicate and finely divided particulate calcium sulfate hemihydrate. The composition rapidly thickens to a semisolid state when the ingredients are mixed and retains its semisolid condition for extended periods of time. The unsaturated polyester resin syrup component of the mixture remains polymerizable until its polymerization is initiated, normally by means of heating in the presence of a high temperature polymerization initiator. Sufficient calcium sulfate hemihydrate is included to react with substantially all of the uncombined water in the other ingredients so that the resulting polymerizable composition is substantially free of uncombined water. The compositions may also contain inert fillers and/or reinforcing fibers. The compositions can be employed to produce coatings, laminates, cast articles, molded articles and other shaped articles.

Abstract: Semisolid polymerizable compositions are obtained by combining unsaturated polyester resin syrup, aqueous alkali-stabilized colloidal silica and finely divided particulate calcium sulfate hemihydrate. The composition rapidly thickens to a semisolid state when the ingredients are mixed and retains its semisolid condition for extended periods of time. The unsaturated polyester resin syrup component of the mixture remains polymerizable until its polymerization is initiated, normally by means of heating in the presence of a high temperature polymerization initiator. Sufficient calcium sulfate hemihydrate is included to react with substantially all of the uncombined water in the other ingredients so that the resulting polymerizable composition is substantially free of uncombined water. The compositions may also contain inert fillers and/or reinforcing fibers. The compositions can be employed to produce coatings, laminates, cast articles, molded articles and other shaped articles.

Abstract: Polyurethane foam products having relatively noncombustible properties, low flame spread ratings and low smoke generating tendencies when exposed to fire can be produced by combining aqueous sodium silicate into the foam forming composition which also includes a viscous, hydroxyl-terminated polyester and a polyisocyanate prepolymer or quasi-prepolymer along with a suitable catalyst, surfactant and halogenated alkane blowing agent. The aqueous sodium silicate ingredient constitutes from about 30 to 60 percent by weight. The aqueous sodium silicate has a weight ratio of SiO.sub.2 /Na.sub.2 O of 2.4 to 3.0 and contains 25 to 75 percent by weight water. The resulting foam, with a density of 1.5 to 4.5 pounds per cubic foot, has a K-factor less than 0.26 and is useful as a thermal insulating substance, especially in building panels.

Abstract: Polyisocyanate prepolymers for use in preparing polyurethane products elastomers, adhesives and foams, are prepared by combining (1) organic polyisocyanate with (2) polyols which are the hydroxyl-terminated digestion products of (a) waste or scrap polyalkylene terephthalate polymers and (b) organic polyols. Polyurethane products resulting from the polyisocyanate prepolymers exhibit useful and unexpected properties.

Abstract: A method of tacking a honeycomb core to a base sheet, the core member having coatings of adhesive, one provided on the ends of the cells of each face of the core. The core is engaged with the base sheet so that one coating of adhesive contacts the base sheet while moving the core and the base sheet as a unit along a rectilinear path of travel. While engaging the core with the base sheet, the base sheet is (a) heated to temperatures within a wetting temperature of the adhesive but below the curing temperature of the adhesive, (b) maintained at temperatures within said wetting temperature range for a time sufficient to allow the one coating of adhesive to be heated, to flow and to form a fillet between the base sheet and the core but insufficient to allow undue heating of the other coating of adhesive, and (c) the base sheet, the adhesive, and the core are rapidly cooled to a discharge temperature which is below the wetting temperature range of the adhesive, thereby to tack the core to the base sheet.

Abstract: Circuitry for generating a sine wave and/or a cosine wave from a pulse signal wherein cyclically repeating pulses each generate one cycle of a sine wave and/or a cosine wave. Each pulse institutes a sawtooth signal; a square wave generator produces a square wave having a positive excursion for one-half of the sawtooth signal and a negative excursion for the other half of the sawtooth signal. The square wave signal is integrated to produce a triangular wave. The triangular wave may be shaped into a simulated harmonic wave by wave-shaping circuitry. If both sine and cosine waves are desired, additional circuitry is employed to convert the described square wave to another square wave of the same frequency, 90.degree. out of phase with the first square wave. The other square wave is converted to a corresponding triangular wave which is shaped to a simulated harmonic wave by wave-shaping circuitry.

Abstract: A double-skin construction panel having its outer skin spaced-apart from its inner skin. The panels are adapted to be assembled without exposed fasteners. A positive mechanical connection between the outer skin and the foamed-in-place panel core is provided. The panels have mating elements in the outer skin to provide for positive mechanical engagement of adjacent outer sheets when the panels are assembled in use.

Abstract: A silencer having a tubular configuration which can be interposed in a duct and form a part of the duct walls. The silencer has an inner perforate wall and an outer imperforate wall. The annular space between the two walls is filled with acoustical sound absorbing materials. The outer imperforate wall is adapted for quick opening to permit easy replacement of the sound absorbing materials.

Abstract: A pulse signal conditioning circuit. Repetitive pulse signals can be sharpened and freed of accompanying, unwanted noise manifestations by means of a network of steering diodes and constant current diodes feeding a comparator circuit producing sharp, uniform pulses.

Abstract: Conveyor apparatus of the non-endless type useful in combination with a press having a stationary lower bed or platen and an upper platen supported above the lower platen by means disposed along the opposite longitudinal sides of the platens. The conveyor apparatus includes feed and take-up rolls, one at each end of the bed, and belt means extending between the rolls and over the bed. Distinct cradle means support each of the rolls for rotation about horizontal axes. The arrangement is such that when the belt means is worn or broken the feed roll and/or the take-up roll may be vertically disengaged from the cradle means thereby to facilitate rapid replacement of the belt means.The conveyor apparatus also is provided with first and second drive means, connectd respectively to the take-up roll and the feed roll, which are individually operable to rotate the rolls about their respective axes to move the belt in a forward direction and in a reverse direction.

Abstract: A wall washing device is provided with self contained liquid spray means, wall and window surface scrubbing means such as brushes or sponges and means for providing a curtain of high velocity, in-rushing air around a wall washing sight. This air serves to dry the freshly laundered wall and window surfaces and also to confine the washing liquids and retard their egress from the wall washing sight. The high velocity, in-rushing air curtain is delivered through a perimeter aperture which is spaced-apart from the window/wall surfaces, in accordance with a first embodiment; and is provided by forceably drawing atmospheric air inwardly at the perimeter of the wall washing sight in accordance with a second embodiment. The device is adapted to ascend and descend between a pair of vertical mullions of the building. The device is further adapted to provide its wall and window washing function during either the ascending or descending runs or both. The device moreover is intended for remotely controlled operation.

Abstract: A laminated building panel of the type comprising a metal facing sheet and a backing. The backing is pre-notched and/or cut in the factory to permit field-bending of the panel to produce corner structures. A factory installed splice plate is secured to the building panel to maintain the structural integrity of the panel during handling and shipment to the job site. A method for preparing the panel for shipment to an erection site is described.

Abstract: A light transmitting building panel comprising a flat central sheet and upper and lower corrugated sheets secured to the opposite faces of the flat central sheet, thereby to provide a set of upper cells and a set of lower cells. The upper corrugated sheet is laterally offset relative to the lower corrugated sheet whereby each upper cell is positioned intermediate of adjacent ones of the lower cells and whereby heat conduction between the internal and external surfaces of the panel is minimized. The flat central sheet and the upper and lower corrugated sheets are formed from a light transmitting glass fiber reinforced plastic. The present building panel is particularly useful in greenhouses as roof panels and wall panels. The long span capability, the light transmitting characteristic and the unique cell arrangement of the present building panel are advantageously employed in greenhouses.

Abstract: Phenolic foam products are fabricated from phenol-aldehyde resol; a blowing agent; a condensation catalyst; a cell control agent; and an allyl ether of methylol-substituted phenol wherein the said allyl ether is present in a range from 0.5 to 25 percent by weight of the phenol-aldehyde resol. The function of the allyl ether is to overcome the extreme friability of the phenolic foam system.

Abstract: A protective cover assembly for an outlet opening of an underfloor access housing is provided to prevent ingress through the outlet opening of a subsequently poured layer of floor fill, such as concrete. The assembly comprises a cup-shaped cap having a fence-like vertical extension detachably connected thereto. The assembly is enveloped by the floor fill and has an upper peripheral edge spaced below the upper surface of the floor fill by up to 1 inch (25.4 mm). A release coating interposed between the protective cover assembly and the floor fill facilitates breakout and removal of the overlying layer of floor fill.