Abstract: A liquid crystal light pipe display for direct imaging onto photosensitive materials, having a non-conductive, transparent first sheet and a non-conductive substantially opaque second sheet, each having substantially planar inner and outer surfaces. The non-conductive sheets are disposed adjacent to one another with their inner surfaces opposing one another in spaced-apart relationship separated by a sealed-in, normally transparent, liquid crystal material. The non-conductive sheets each have a transparent conductive electrical coating disposed on their inner surface, of a plurality of discrete character forming segments with means connected thereto for electrically coupling said segments to an external power source. The second non-conductive sheet has a plurality of discrete transparent light pipes formed therethrough, each of which are aligned with one of said character forming segments.

Abstract: A method and apparatus for drying and setting the adhesive on the backs of books contained in book blocks or similar articles by vaporizing the water using high frequency RF energy. The books are generally mounted in clamps and moved on a conveyor from the input of the book binding machine through a ventilation system to its output. A high frequency RF field is disposed along the conveyor and has a plurality of spaced apart RF electrodes wherein the electrodes adjacent to the input and output are more closely spaced together than those in the center of the machine so that the energy of the high frequency RF field can be varied in an inverse proportional relationship to the dielectric loss factor of the adhesive layer during the drying cycle.

Abstract: A portable camera is described by which electrostatic photocopies can be obtained instead of conventional photographs. The camera includes conventional aperture and optical focusing means for producing an image, a surface on which the image is formed, electrode means for electrically charging the surface, an integral EHT generator for producing a high voltage pulse for application to the electrode, a shutter for controlling the passage of light to the surface and a means for applying a printing medium to the surface for retention thereon in dependence on the level of electrical charge remaining at different points over the surface after exposure to the light image.Rollers and a reservoir of a suspension of printing medium particles serve to apply the printing medium to the surface and heated rollers or pressure rollers are used to fix the print.

Abstract: An ultrasonic transducer including a thin piezo-electric substrate and an interdigital electrode radiating ultrasonic wave beams with excellent focusing characteristics into a liquid medium in contact with the substrate by applying AC voltages to the electrode.

Abstract: A latch needle for knitting machines has a hook and needle shank and a latch pivotally mounted in a longitudinal slot in the needle shank with the faces of the needle shank flanking the longitudinal slot having support portions recessed relative to the upper edge of the needle shank for supporting a widened portion of the rear part or spine of the latch. A short portion of the longitudinal slot contains an aperture leading to the lower edge of the needle shank, and a further portion of the longitudinal slot adjacent to the short portion is deeper than half the height of the needle shank and projects in length beyond the end of the latch in its rearward open position displaced away from the hook. The support portions of the shank for the widened portion of the spine of the latch are located over the inner starting region of the further portion of the longitudinal slot.

Abstract: A compressed air dredge for removing gravel, sand, mud or the like from the sea floor is provided of the type including a compressor which is installed on a dredging ship having a vertically-disposed feed pipe and which, via a compressed air line, blows compressed air into the bottom end of the feed pipe so as to provide the required suction force. The dredge is characterized by the provision of at least two vertically disposed feed pipes, each of which is coupled to a separate compressor and each of which is provided with a separate compressed air line. The compressed air lines are coupled together via a coupling line having shut-off means for establishing and closing-off communication between the two compressed air lines.

Abstract: A closure plate for hot blast slide valves of the type having a hollow ring of box-like cross section cooled by running water to whose inner circumference a body is attached by welding, which is formed by parallel plates and is likewise cooled by running water. The thickness of the body in axial direction is smaller than the axial length of the hollow ring, and the outer surfaces are coated to about the height of the front faces of the ring with refractory concrete, the coating being tied to these outer surfaces by anchoring means.

Abstract: A connector is described for joining tubes together, particularly plastics tubing as used in laboratories and the like.The connector comprises a first member having a barb-like projection through which the tube can be pushed but cannot be pulled in the reverse direction due to the interaction between the barb-like projection and the surface of the tube. The protruding captive end of the tube passes through a resiliently deformable disc of plastics material preferably Polytetrafluroethylene and in a preferred embodiment the disc is partly housed in a cup-shaped extension from the first member.The assembly of first member and disc is secured within a sleeve by means of a screw-thread engagement between the said first member or a further member which acts on the rear of the said first member. The said further member is screw-threadedly engaged into or onto the sleeve.

Abstract: A snow removal bar for the snow removal plate of a snow removal plow consists of a rubber or plastic element which is reinforced with steel plates on both sides thereof, and which has an upper edge mounted on the lower edge of the snow removal plate with screws. Only the lower area of the rubber or plastic element, which comes into contact with the road, is reinforced by the steel plates and the center area thereabove is reinforced by elastic reinforcements. The reinforcements are embedded in the rubber or plastic element and extend from the upper edge of the plastic or rubber element to the area between the steel plates.

Abstract: An automobile body includes a front windshield and a passenger compartment having a pair of body side panels between which is disposed a front seat section and a rear seat section, and a collapsible, segmented convertible hard top roof. The roof is mounted for manually-activated movement between a raised, non-collapsed position, in which the roof extends from an upper edge of the front windshield rearwardly over the front and rear sections of the passenger compartment at a sufficient height so that the body assumes the general configuration of a hard top four passenger sedan or coupe body, and a lowered collapsed position, in which the roof extends substantially over only the rear seat section of the passenger compartment at a lower height such that it lies substantially flush with the upper edges of the body side panels so that the body assumes the general configuration of a two-passenger, open top roadster.

Abstract: A filter operable in a microwave frequency band comprises a conductive closed housing having a bottom wall, an upper wall and side walls between said bottom wall and the upper wall, a plurality of resonators fixed on a straight line on the bottom wall inside of the housing, one end of each resonator being grounded to the bottom wall and the other end of each resonator being free standing, each resonator having at least an elongated center conductor and a dielectric body covering the center conductor at least partially in the longitudinal direction of the center conductor, a pair of connectors mounted at the opposite ends at the side walls for coupling the filter with an external circuit, a pair of loops each connected to the inner conductor of said connector and one end of the loops being grounded to the bottom wall, a pair of confronting conductive disks being provided between the free standing end of each center conductor of a resonator and the upper wall to provide the capacitance between said free standin

Abstract: A hand-held, non-electrically powered heating instrument includes a generally cylindrical, hollow, elongated, metallic first element having means for mounting a charge of burnable fuel therein and also having a plurality of air vents at one end thereof and an air inlet opening at the opposite end thereof. The instrument also includes a generally cylindrical, hollow, elongated, metallic second element having a substantially closed end and an opposite open end and a plurality of air vents formed substantially adjacent to the closed end thereof. The second element is configured and dimensioned to permit the first element to be releasably and telescopically received therein through the open end thereof, so that the air vents of both elements may communicate with one another. The first and second elements are slidable relative to one another in both a rotatably and longitudinal manner so as to permit regulation of the amount of air flowing through the air inlet opening and through the vents.

Abstract: A water filter for radiators is provided which is characterized by the fact that it is fitted with a thick internal cylindrical mesh inserted into another cylindrical mesh similar to the foregoing but with a finer mesh. Both meshes are fixed by supports placed by pressure between both means and a coupling flange.

Abstract: A solid state music player for reproducing and playing stored digital information from a magnetic bubble-memory device, which has a magnetic bubble-memory module for receiving the bubble-memory device which contains the stored program. There is also a function-timing generator, which is coupled to the magnetic bubble-memory module for generating control and timing signals for the module. A microprocessor is connected to a bubble-memory controller which in turn is coupled to the function-timing generator, and the bubble-memory controller responds to commands from the microprocessor to send control signals to the function-timing generator, necessary to access the digital data stored in the bubble-memory device. A digital-to-analog converter is coupled to the microprocessor for converting the digital stream of information from the microprocessor into analog signals, which then can be played through loudspeakers or on a video screen to reproduce the stored digital information from the bubble-memory device.

Abstract: A system for the fixing of prints with reactive and vat dyes in the two phase printing method on textiles made of cellulose and, in particular, continuously running webs of material made of textile, knitted material, fleece, and the like, wherein the required auxiliary means for fixing is applied onto the web of material by electrostatic spraying. The system is characterized by the provision of a device for the electrostatic spraying of the auxiliary means onto the web of material which is positioned in the fixing device.

Abstract: An apparatus and process for cementing semiconductor discs onto a carrier ate, wherein after the carrier plate is coated with a layer of adhesive substance, the discs are applied to the adhesive layer and a vacuum-tight sealing dome is placed over the carrier plate to define a sealed, hollow space. A chemically-inert elastic diaphragm is clamped within the dome 0.2 to 1.5 mm above the free surface of the discs, to divide the hollow space into two sections or subchambers which are initially simulataneously evacuated. Then, air pressure is applied to the upper section, so that the discs are pressed by the diaphragm onto the cement layer. Air pressure is then subsequently fed to the lower hollow space, so that the dome can be removed from the carrier plate.

Abstract: An electro-pneumatic dynamo includes a rotary engine having an engine casing, two rotors rotatably mounted within the casing having intermeshing blades and fluid medium inlet means for injecting a fluid medium between two intermeshing teeth of said rotors. The engine casing and blades are made of a non-magnetic material. The dynamo also includes a generator device composed of a plurality of magnetic rods, each of which is mounted in one of the teeth of the blades and a plurality of magnetic circuit elements mounted on the casing for cooperation with the rods. The circuit elements include a coil and a generally U-shaped magnetic bar having a base on which the coil is mounted and two ends between which the rods of one of the rotors passes upon rotation of the rotors so as to induce a flow of magnetic flux through the bar and thereby inducing an emf or current flow in the coil.

Abstract: A naval warfare board game apparatus is provided which consists of two sets of two grids or pegboards, each having a 10.times.10 grid pattern of peg holes, and one of which is a minefield grid and the other of which is a tracking grid. Each player hides his set from view of the other player and sets out 17 pegs, representing mines, on his minefield grid, without disclosing their position to his opponent. The first player then moves pegs representing his fleet of seventeen ships from a starting corner position on his tracking grid and attempts to cross the board to an opposite corner representing a "victory" position. During the voyage, if a player's fleet hits one of his opponents mines, his fleet is stopped and the other player then takes his turn and moves his fleet from the starting position. When, and if, the second player hits a mine the play reverts to the first player and he recharts his course from the position just prior to hitting the mine to continue on his voyage to the victory position.

Abstract: A DC-DC converter for converting a primary DC voltage to a secondary DC voltage comprises a transformer with a primary winding and a secondary winding each wound on a ferromagnetic core, a primary DC voltage power source, a plurality of switching transistors connected between said DC voltage power source and the primary winding of the transformer, means for controlling the status (ON or OFF) of the transistors so that an alternate current or an intermittent current in the predetermined direction flows from the DC power source to the primary winding of the transformer, a rectify/smoothing circuit connected between the secondary winding of the transformer and a load, and said primary winding of the transformer having a center tap which is connected to one end of the DC voltage power source through a capacitor.