Abstract: A display unit for a head-up display system which includes a periscopic arrangement 21a,b at each side of the exit pupil 19 of an optical projector. This arrangement is effective to direct collimated light to a conventional monocombiner 11, from lateral portions of the display which otherwise would not be received by the observer without head movement. It thereby increases the observer's instantaneous azimuth field of view of the display.

Abstract: A push-type sweeping broom having a handle with a connector end terminating in a reduced-diameter threaded section and a broom block, preferably of molded plastic material, with a raised inclined mound on the upper surface thereof surrounding a blind bore adapted to receive the connector end of the handle. The bore has an upper portion and a lower portion, the lower portion being of reduced diameter in comparison with the upper portion and having threads on its walls. The connector end of the handle is inserted into the bore until the threaded terminal section thereof engages the threaded lower portion of the bore, and the handle is then tightly screwed into the bore, with the upper portion of the bore and the surrounding mound snugly receiving and supporting a portion of the connector end of the handle. The broom block has a plurality of discrete groupings of bristles distributed across its lower surface.

Abstract: A composite seat cover includes a covering element which has two opposite major surfaces one of which faces away from the seat in use. This surface is provided with a plurality of regions which may be provided on separate members affixed to one another, such as by sewn seams, to constitute the covering element. At least two sets of such regions are provided, one such set having relatively long and the other relatively short hair-like elements at the one major surface which form alternating patches. Because of the alternation of the long-haired and short-haired patches, the seat user will be able to occupy the seat covered by such a seat cover for extended stretches without feeling discomfort. The seat cover can also include a backing consisting of a foam padding and a backing sheet. The seat cover can be secured to the seat by a strap of a variable length, or by a plurality of such straps.

Abstract: A game whose object is the formation of words or groupings of symbols utilizing a plurality of multi-faceted playing pieces, such as cubes, each of whose faces bears a single symbol such as a letter. The playing pieces are positioned in a receptacle which is mounted for spring-loaded pivotal movement on a support structure. The receptacle is engaged in cocked position by a latching mechanism attached to the support, and when the latching mechanism is disengaged, the receptacle is rapidly rotated about a horizontal axis, causing the receptacle to forcefully strike an abutment mounted on the support, thus scrambling the pieces. The receptacle then is restored to the cocked position in which the playing pieces are so supported that a single upper symbol is displayed on each piece.

Abstract: For over-molding a thermo-plastic material on a connector, the connector is, at the outlet of the machine having crimped the connector on a conductor, carried into a gripper maintaining the connector when introducting a core mounted on a conveyor. The connector is then carried into an injection mold from which it is extracted before complete cooling, to be carried to a cooling station comprising a mold similar to that of the injection mold but being at a lower temperature.

Abstract: A roll dispensing container which is used for storing an elongated web of thermoplastic material comprising plural laminae which define a multiplicity of gas-filled bubbles.. The container is constructed in a manner that permits easy measured dispensal of the web therefrom. The roll dispensing container is easily assembled from a corrugated-board blank and when fully assembled is dimensioned so as to be capable of being shipped from place to place relatively inexpensively.

Abstract: In a receiver arrangement for a quadrature phase-shift digital data transmission system including an adaptive equalizing regenerator, a phase control signal for the local oscillator is derived from an output of the regenerator and decision feedback signals within the regenerator are applied by way of balanced current switching circuits.

Abstract: According to this invention a process for forming a crystal of a substance comprises securing surfaces of two crystals (1) together with the axes of the crystals aligned and depositing said substance onto the joined crystals thereby causing them to grow into a single crystal substantially or entirely surrounding the registering regions (2) of said surfaces.A resultant crystal may be sectioned to provide large, single crystals (3) not containing a bonded region.

Abstract: A target tracking airborne active radar system in which a reduction in transmitter power is achieved by using individual amplifiers in the aerial quadrant channels. The amplifiers provide gain on transmission and negligible loss on reception and are realized by Impatt diode/hybrid junction modules.

Abstract: In a process for the recovery of hydrogen from compressed purge gas withdrawn from a recyling gas stream of an ammonia synthesis wherein the hydrogen is separated from the purge gas by partial condensation at cryogenic temperatures, refrigeration is provided by expanding and evaporating the condensate so formed, and the partial pressure of the expanded condensate is lowered by withdrawing a bleed stream from said uncondensed gas, expanding said bleed stream and injecting it into said expanded condensate, condensation of nitrogen employed to purge the cold box for the cryogenic process is avoided by either injecting into the bleed stream a warmer gas provided from the uncondensed gas and/or the purge gas or expanding the condensate and bleed stream in stages with separate expansion thereof in an initial stage and injection of the bleed stream into the condensate prior to the final stage.

Abstract: A keeper for detachably attaching the two ends of a length of flexible linear solid chain, such as a necklace or a bracelet, to each other. A spherical ball at one end of the chain is inserted into a deformable clamp which is attached to the other end of the chain. The clamp has two arms which detachably engage the ball. A frusto-conical keeper element is freely mounted about the chain length adjacent the clamp; the keeper element converges and tapers away from the clamp, so that when the clamp with engaged ball is displaced into the keeper element by concomitantly pulling the keeper element and the other end of the chain away from each other, the clamp and engaged spherical ball are tightly fitted into the keeper element. The outer surface of each curved arm of the clamp thus engages the inner surface of the keeper element, so that the two chain ends are detachably attached to each other, and cannot be separated from each other, except by pulling the one end of the chain length away from the keeper element.

Abstract: Fast positive photoresist compositions employing cresol-formaldehyde novolak resins made from a mixture containing meta- and paracresol or ortho-, meta- and paracresol in a ratio selected from a given range and one or more of a selected group of naphthoquinone diazide sensitizing compounds. When dissolved in a mixture of organic solvents, the photoresist compositions are suitable for application as a thin coating to a substrate. After the coating has been dried, the coated substrate can be exposed to image-wise modulated actinic radiation even in the deep ultra-violet range and developed in alkaline solution, yielding a high-resolution relief pattern of resist on substrate useful for a number of applications.

Abstract: An extrusion die for a pasta-making kitchen appliance includes a first part which has a perforated main portion and a second part which has a support portion received in a recess in the first part and having at least one projecting portion which extends into the associated aperture of the first member. Advantageously, there are as many projecting portions, all supported on the support portions, as there are apertures, and the projecting portions are received, in a one-to-one relationship, in the respective apertures. At least one fin extends radially of each of the projecting portions and contacts the surface bounding the respective aperture to support the projecting portion in such aperture. The support portion may include a plurality of discrete legs, some of which are connected with the support legs of the other pins or projecting portions, while the remaining legs engage the internal surface of a collar portion of the first member which surrounds the recess accepting the support portion.

Abstract: An audio-visual, child-participating, educational entertainment center, which provides a child with an educational entertainment device in which the child can actively participate, at his own pace, in an audio-visual feature. The educational entertainment center comprises a screen upon which visual images are projected, an animated audio-visual feature, a kit containing different types of appliques, the appliques being capable of integration with the audio-visual animated feature, and a switch to stop and restart the audio-visual feature at will, thus permitting the child to apply the applique means at his own pace.

Abstract: A dispensing valve to be used with a bottle of fluent imaging material. The valve is so structured that it can be assembled more rapidly and easily than existing dispensing valves used for the same purpose. The new valve holds the valve plug and the biasing spring in proper relative position on the actuating spindle without the use of retaining rings and does not require a jig for its assembly.