Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.

Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal of a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.

Abstract: An audiovisual subscription system includes means for aperiodically inverting the lines of a transmitted video signal on a frame-by-frame basis and for decrypting encrypted PCM audio information which is transmitted along with the aperiodically inverted video information.

Abstract: This invention is a music box and a special clamp for securing the box on an umbrella shaft at a location where a canopy-spreading mechanism of the umbrella automatically activates the music box when the umbrella is opened up.

Abstract: A combination flashlight and lamp which may be used in fixed position as a table lamp. Lamp section may be removed and the instant invention becomes a powerful flashlight. Rechargeable batteries contained in the flashlight section are maintained at full charge by a built-in battery charger. The invention is aesthetically pleasing and can be modified to fit most room decors. Several mechanisms for rapid assembly and disassembly are provided. The base of the lamp, which is actually the flashlight section may be made of a translucent material so that, when the invention is used as a table lamp and the flashlight is activated, the base of the lamp will grow creating a special decoration feature.

Abstract: An apparatus is provided for forming, shaping and surface finishing a foam extrudate as it expands and passes from an extrusion die to obtain, in particular, foam or cellular bodies having a substantial thickness in relation to their width. The apparatus comprises opposed extrudate shaping members located on opposite sides of the die orifice of the extrusion die and extending immediately downstream therefrom. The upstream end of each shaping member is hingedly supported adjacent and preferably slightly upstream from the die orifice, and the hinged supports at the upstream ends of the shaping members are uniformly adjustable towards and away from the central transversely extending plane of the extrusion die. The downstream end of each shaping member is hinged to a respective conveyor or surface finishing member of a conveyor or surface finishing assembly.

Abstract: An improved method and apparatus using edge shaping and traction rolls is disclosed for shaping and forming plastic foams as a foamable extrudate is extruded through an arcuate orifice of an extrusion die. Immediately adjacent and downstream of the die orifice are opposed sets of curved rolls, each having substantially the same center of curvature as the die orifice and being positioned, respectively, on opposite sides of the extrudate pass line. Moreover, two pairs of traction shaping rolls downstream of the curved rolls engage edge portions of the extrudate further to assist in shaping the same especially in connection with the shaping and forming of relatively wide bodies of plastic foam material. Several parameters of the traction rolls may be adjusted to selected values affecting the force and direction applied by such rolls to the extrudate.

Abstract: A foam extrusion die assembly includes a die body and a pair of spaced cantilevered lip members having opposed lips defining an elongated, arcuate die orifice through which extrudate moves both laterally and axially outwardly relative to the lip members. Each lip member further has an axially extending flexible leg and a foot at the end of the leg opposite the lip. Each foot is adjustably and sealingly clamped to the die body by a retainer bar whereas each leg is free to flex to pivot the lips with respect to each other. Adjustment screws journaled in the die body vary the spacing between the feet of the lip members and pivot the lips about the flexible legs to produce a desired die orifice size and shape.

Abstract: A method is provided for controlling the build-up in concentration of triorganoamine exchange catalyst in an organic extraction solvent used in the extraction of aromatic bis(ether phthalimide) and N-organo substituted phthalimide from an imide-anhydride exchange reaction mixture. The concentration of the triorganoamine exchange catalyst is controlled in the extracting organic solvent by extracting the organic solvent with an aqueous mixture of phthalic acid and triorganoamine and thereafter recycling the organic solvent to the extractor.

Abstract: Novel thermoplastic molding compositions are disclosed which comprise a polycarbonate molding powder in admixture with a minor amount of a volatile matter entraining agent selected from the group consisting essentially of monochlorobenzene, a polyhydric material and solutions of a polyhydric material in water. A method of preparing a polycarbonate molding composition containing reduced amounts of volatile impurities is also disclosed.

Abstract: An extrusion system for the production of foam boards, billets and the like products includes an extruder (20) at a first higher elevation (22) extruding foamable resin through a die in the upper end of an elongated vacuum chamber in the form of an inclined barometric leg (26) which extends at its lower end into a shallow but large surface area pool (39) of liquid such as water. An elongated shroud or hood (44) on the lower end of the leg reduces the pressure head of water above the foam product as it exits the leg and moves out of the pool for processing at a lower second elevation. The large area of the pool reduces its depth for a given volume and minimizes fluctuations in the level of the pool and the pressure head above the product when the vacuum changes. In one embodiment the pool extends beneath substantially the entire floor of the building (30) enclosing the second lower elevation (31) in which the subsequent processing occurs.

Abstract: A foam extrusion apparatus employs one or more extruders mounted on horizontal rails for movement toward and away from the end of a vacuum chamber which is in the form of an elongated inclined barometric leg. The upper end of the chamber is closed by two, substantially concentric in the closed position, substantial bulkheads, each also supported on rails and held in an inclined position to close the upper end of the chamber when moved; one against the chamber and the other against the one. A die is positioned on the inside of the other or smaller bulkhead and aligned with the leg when closed. The extruders are connected to the die through a length of pipe extending through the smaller bulkhead and sealed by a bellows. A shaping mechanism is supported on the interior of the one or larger bulkhead surrounding the die when both bulkheads close the upper end of the inclined barometric leg or vacuum chamber. The die is adjustable externally of the bulkhead.

Abstract: An improved method and apparatus is disclosed for shaping and forming plastic foams as a foamable extrudate is extruded through the orifice, preferably arcuate, of an extrusion die. Immediately adjacent and downstream of the die orifice are opposed sets of curved rollers, each having substantially the same center of curvature as the die orifice. The roller set on one side of the extrudate pass line is adjustable as a set with respect to and substantially parallel to the pass line, while the rollers of the set on the opposite side are adjustable individually each to float with controlled pressure against the extrudate as it expands and moves between the roller sets. Each roller is comprised of a plurality of thin, cylindrical, circular wafers which are drivingly interconnected and journaled on curved core shafts.

Abstract: A foam extrusion apparatus and method employs tandem extruders mounted on horizontal rails for movement toward and away from the end of a vacuum chamber which is in the form of an elongated inclined barometric leg. The upper end of the chamber is closed by a substantial bulkhead also supported on rails and held in inclined position to close the end of the chamber when moved thereagainst. A die is positioned on the inside of the bulkhead and aligned with the leg when closed. The extruders are connected to the die through a length of pipe supported through the bulkhead by a stainless steel bellows. The pipe externally of the bulkhead is provided with a circulating jacket for temperature control. The die is adjustable externally of the bulkhead. The extruders, die and bulkhead are movable as a unit or separately toward and away from the chamber to provide access to the die and the interior of the chamber.

Abstract: A foam extrusion die of the type including a main die body having a face and two spaced, adjustable die lip members having lips defining an elongated, arcuate die orifice through which extrudate moves both laterally and axially outwardly relative to the lip members. The die includes toe and heel clamp assemblies fastened to the die body for biasing the lip members against the face for continuous sealing line contact therebetween. Choker bars secured to the die body at opposite sides of the face define the ends of the die orifice. Provision is also made for specially fabricated heating or cooling passages in the lip members proximate the die orifice.

Abstract: A foam extrusion apparatus and method employs an extruder on an upper level extruding foamable extrudate into the upper end of a large elongated barometric leg which extends at a relatively shallow angle into a pool of water at a lower level. A conveyor in the barometric leg extends through a large radius in the pool to guide the extrudate from the pool for further processing. The leg is in the form of an elongated pipeline fabricated from sections and supported on an inclined ramp. Some of the sections are securely anchored to the ramp to resist axial forces when the leg is evacuated. The sections may be reinforced concrete or fabricated reinforced steel of a variety of sectional shapes. Each section is sealed end-to-end so that a vacuum within the leg will draw water from the pool into the leg leaving a vacuum chamber at the upper end of the leg in which the extrudate expands.

Abstract: Turbine engine power extraction and acceleration capabilities are enhanced by the sensing of the amount of air that is bled off from a compressor, and biasing the acceleration schedule in relation thereto. In this way the engine shaft power extraction and/or rotor acceleration capability can be maximized by enriching the acceleration fuel schedule when compressor bleed air is extracted. The selected degree of enrichment may be applied so as to consume the entire stall margin gain, whereby the engine is made to follow the same acceleration trajectory on a compressor map notwithstanding the degree of compressor bleed, or the degree of enrichment may be applied so as to obtain the desired performance level while retaining a portion of the gained stall margin.

Abstract: Reinforced thermoplastic compositions are provided comprising a poly(1,4-butylene terephthalate) resin, a poly(ethylene terephthalate) resin, and a reinforcing, warp resisting combination of talc and silica. The compositions optionally include a segmented copolyester resin, a silicon polymer and/or a fibrous glass reinforcement. The compositions are moldable to articles having improved resistance to warpage during heat treatment in comparison with molding compositions of talc, (poly(1,4-butylene terephthalate) and poly(ethylene terephthalate).

Abstract: Reinforced thermoplastic compositions are provided which comprise a high molecular weight polyester and a mineral reinforcing filler comprising mica, talc or mixtures thereof in combination with a glass fiber reinforcement. The use of glass fibers together with the mineral reinforcement provides shatter resistance and further enhances other physical properties, such as tensile strength, modulus, impact strength and heat distortion temperature. Self-extinguishing embodiments are also disclosed.

Abstract: A method of removing an article from a chamber having a reduced pressure therein by connecting the chamber to a pool of liquid by a barometric leg is disclosed. The method provides a conveyor in said barometric leg and allows said article to float up into engagement with said conveyor so that the force exerted on the article by the conveyor moves the article down into the pool of liquid and out into the atmosphere.