Abstract: A quick-change holder for a machine tool wherein a nut holding a tool can be attached and detached by a single action. In the quick-change holder of the type, in which the nut charged with the tool can be attached to and detached from a holder body by the radial movements of a plurality of balls which are so loosely fitted in a plurality of radial through-holes formed in the holder body as to be made movable in the radial direction, according to the present invention, the aforementioned holder body is formed with an outwardly diverging conical inner circumference in which a spring having free wire ends with a gap therebetween so as to be compressible radially inwardly is fitted under radially inward compression in an inscribed relationship therewith, and the aforementioned spring is brought into abutment engagement with the balls, when the nut is not inserted, thereby to push the balls outwardly in the radial direction.

Abstract: A color selective filter in the form of a holographic reflector is produced by a method which includes the step of exposing a photosensitive film of gelatine to a monochromatic laser beam. In order to obtain acceptably short exposure times and to enable substantially the whole of the available laser light to be utilized, a relatively narrow laser beam is sequentially scanned across the surface area of the gelatine film in a scanning pattern which consists of a large number of parallel straight lines. The diameter of the laser beam spot is very large as compared with the spacing between adjacent line scans. In this way each point on the gelatine film is scanned a very large number of times.The laser beam 8 is generated by a laser 7 and deflected by two movable mirrors 10 and 11, which are controlled so that the beam scans the whole of the gelatine film 1.

Abstract: A hearing aid has a circuit board having conductor strips thereon; first plug-in elements mounted on the circuit board and being electrically connected to selective conductor strips; a plurality of circuit board-supported modular structural units; and second plug-in elements mounted on each circuit board-supported modular structural unit. The first plug-in elements cooperate with respective second plug-in elements for securing selected circuit board-supported modular structural units on the circuit board.

Abstract: An apparatus for supplying fuel to a combustion device has first and second tanks for storing light and heavy fuel, respectively, a third tank connected to the first and second tanks by first and second conduits, respectively, for supplying light and heavy fuel to the third tank, a third conduit connecting the third tank with the combustion device for supplying fuel from the third tank to the combustion device; a fourth conduit connecting the combustion device with the third tank for returning excess fuel from the combustion device to the third tank; a pump in the third conduit for driving fuel through the third and fourth conduits. The pump has an output flow rate that is greater than the rate of fuel consumption of the combustion device.

Abstract: For controlling the output and the silver density in a carding machine, lot-specific data are determined, then fed into a memory from which the data may be recalled at will and applied to the control of the carding machine.

Abstract: Process and device for the forming, on the end of a pipe made of a thermoplastic, of a coupling piece possessing an undercut annular groove intended for receiving an annular seal, according to which process and device the coupling piece is initially preformed by means of a forming core which possesses an annular rib for forming the annular groove, the core then being withdrawn from the partially cooled coupling piece by virtue of an elastic deformation of the part possessing the groove, by means of the rib of the forming core, and this part being kept at the elastic deformation temperature, and according to which this part is subjected to a postforming operation, before it has completely cooled, by means of a postforming ring.

Abstract: A differential pressure sensor comprises a housing having first and second inlets; a rod-shaped capacitive displacement sensor affixed to the housing in the interior thereof; a first electrode constituted by an end face of the displacement sensor; a second electrode constituted by a diaphragm extending generally parallel to and at a distance from the first electrode; a bellows affixed to the housing and the diaphragm along a circumference thereof; a first chamber defined within the housing and communicating with the first inlet; and a second chamber defined within the housing and communicating with the second inlet. The first and second chambers are separated fluid tight from one another. One of the faces of the diaphragm is exposed to the pressure of a first fluid admitted to the first chamber through the first inlet and the other face of the diaphragm is exposed to the pressure of a second fluid admitted to the second chamber through the second inlet.

Abstract: A method of producing electrical contacts on a Silicon Solar Cell comprises stamping contact shapes from a carrier with a metallic film or foil adhered thereto and applying the stamped out film or foil to the silicon surface to adhere thereto while removing the carrier therefrom.

Abstract: An electronic ignition system comprising an ignition coil, having the spark gap in circuit with its secondary winding, a primary transistor and a current limiting circuit in circuit with its secondary winding, a filter transistor connected in front of said primary transistor and controlled by a control signal and a resistor network connected in the current path of the filter transistor, the filter transistor and the resistor network being so dimensioned that, during a rise in current in the primary winding, the further transistor is in saturated operation and a jump in the voltage across the resistor network to a constant maximum voltage when the current is limited by the current limiting circuit, a pulse being derivable from the voltage curve at the resistor network.

Abstract: An internal gear pump motor having a housing, a pinion and an internal gear rotatably supported in the housing and meshing with each other, and filler piece means located in a space defined between the pinion and internal gear for dividing the space into two regions providing a low pressure region and a high pressure region during operation. The filler piece means includes at least one filler piece floatingly mounted within the space and having portions capable of coming into sliding engagement with tooth crests of the pinion and internal gear respectively in a portion of the space where the distance between the tooth crests of the pinion and internal gear is reduced toward the low pressure region. A stopper pin is secured to the housing operative to engage one end of the filler piece on the side of the low pressure region for restricting the circumferential movement of the filler piece toward the low pressure region.

Abstract: A forming machine to form a sheet of metal to an "S" bend having clamps to clamp the sheet metal, one of the clamps having an anvil about which the sheet metal is folded by a rotatable forming bar to form a first channel and partially form a second channel in the sheet metal after which the rotatable bar is moved clear and a nose on a further former further folds the second channel facing in the opposite direction to the first channel.

Abstract: An apparatus for simulating a color printing process comprises a scanning unit including a table on which four color separation films formed from a color original are placed side by side, a pair of flying spot scanner tubes, four lens systems for projecting raster images of the scanner tubes onto the four color separation films and four photomultipliers for converting light rays passing through the respective films into subtractive primary color signals of cyan, magenta, yellow and black; a control unit for effecting various adjustments and correction upon the color signals and including a zero adjuster, an after image corrector, a continuous tone gamma corrector, a screen gamma corrector, a soft/hard corrector, a negative/positive corrector, a flat etching device, a contrast adjuster, a light adjuster, a shadow adjuster and a partial adjuster; a color reproduction process unit for converting the adjusted and corrected subtractive primary color signals into additive primary color image signals of red, green a

Abstract: A puffer-type gas blast circuit interrupter composed of two separable contacts defining a power current path and between which an arc is created upon separation movement, in which the movable parts of the gas compressor and/or the region of contact between the contacts of an associated nominal current path are shielded from the region in which the arc is created by a shielding arrangement composed of a stationary cylinder surrounding the nozzle associated with the gas compressor and a shield member carried by the nozzle. Additionally, to reduce the movable mass of the interrupter, at least one of the current paths is constituted by two stationary contact pieces and a movable contact member carried by, and projecting from, the cylinder of the gas compressor. Further, the mass of the moving parts of the system is reduced by providing the shield member carried by the nozzle with a cylindrical projection coaxial with, and slidable relative to, the stationary cylindrical member.

Abstract: A processor arrangement consists of a number of individual autonomous processor units which communicate with each other by means of electro-magnetic waves. The electro-magnetic energy is typically at infra-red optical frequencies. Although the energy necessary to operate the individual processor units can be supplied by means of conductive bus bars, in a preferred arrangement the energy is supplied from a light source at optical frequencies to photo cells mounted on each of the processor units. Each processor arrangement is provided with an input-output device which communicates with the individual processor units by means of electro-magnetic waves and is provided with external conductive leads in a conventional manner. The whole processor arrangement is encapsulated in an evacuated chamber.

Abstract: A bale supporting apparatus for stabilizing fiber bales during opening of the fiber bales from the top includes a support element arranged to engage a vertical end face of a bale and further arranged for stepwise, vertically downwardly oriented motion as the bale height decreases during the bale opening process. The support element is mounted on a stationary carrier structure which is situated horizontally adjacent the space occupied by the fiber bales undergoing opening.

Abstract: A continuous process for the manufacture of carboxylic peracids by reacting the corresponding carboxylic acid with hydrogen peroxide in the presence of a catalyst and in the presence of an inert organic liquid which is a solvent for the peracid and is capable of forming a heterogeneous azeotrope with water, removing the water present in the reaction mixture by distillation of the water/organic liquid azeotrope, and keeping sufficient water in the reaction mixture to allow the formation of an aqueous phase which is separate from an organic phase containing the organic liquid.

Abstract: The invention relates to compositions of chlorinated solvents such as 1,1,1-trichloroethane, stabilized by means of a heterocyclic compound containing oxaziridine units, such as 2-tert.-butyloxaziridine.

Abstract: In a circuit arrangement including a plurality of multi-position data switches and a memory connected for storing, in respective addressable memory locations, representations of the positions of the data switches, each data switch is a multi-digit coding switch having an actuating input and a plurality of code outputs at which appear a set of signals representative of the setting of the switch upon appearance of a signal at its actuating input, and the arrangement further includes a multiplex signal generator having a plurality of clock outputs each connected to the actuating input of a respective coding switch, the generator being arranged to produce a sequence of pulse signals and to deliver each pulse signal of the sequence to a respective clock output, and a bus bar composed of a plurality of conductors equal in number to the number of code outputs of each coding switch, with each conductor being connected between the memory and a respective coding output of each coding switch so that the appearance of a

Abstract: A silicon layer solar cell comprises a low resistance silicon substrate produced by powder metallurgy, to which an active silicon layer is applied. The invention also includes a method of producing such a solar cell.

Abstract: A shotgun cartridge comprising a charge of shot, each shot being coated with an illuminant, and a solid firing agent for firing the illuminant, so that upon firing the cartridge a marksman can trace the trajectories of the individual shots and the extent to which the charge of shot spreads.