Abstract: The improved structures of the push-button key of keyboard are characterized in that the upper housing panel of keyboard comprises a plurality of partitioned sections where the push-button keys are installed, and that a key barrel of a predetermined height is set up at the center of each of the partitioned sections. The barrel wall comprises two slide keys positioned correspondingly to two slide key seats of the push-button key. The hooking means are arranged in the partitioned section at a predetermined distance from the key barrel. The stability of up-and-down movement of the push-button key is ensured by virtue of a coordinated action of slide key and slide key seats. The hooking means serve to confine the movement of the push-button key and to prevent the push-button key from being detached easily.

Abstract: A process for removal of cement from the medullary canal of a patient's long bone comprising: determining the profile of a line of intersection of a plane, and a cement/bone interface intersected by that plane; determining the thickness of the cement in the plane; forming a substantially planar cutting blade with a cutting edge having a profile corresponding to the profile of the line; inserting the cutting blade into the cavity with the blade lying in the plane, the cutting edge directed towards the interface, and to a depth such that corresponding points of the cutting edge are adjacent corresponding points on the line causing the cutting blade to reciprocate; inserting into the cavity a guide member to urge the blade into the cement towards the cement/bone interface; removing the cement from the cavity.

Abstract: A fender guard associated with and protecting the fenders mounted on a utility type trailer or similar vehicle. The fender guard includes a plurality of generally parallel, laterally spaced rails or frame members that overlie the upper surface of a fender with downwardly and outwardly inclined end portions forming a continuation of the rails or frame members having an attaching bracket at the lower end thereof for mounting on the trailer frame or other rigid component of the trailer. The rails or frame members which overlie the fender are also connected to the fender to provide protection for the fender from heavy objects coming into contact with the fender and also provides a surface on which a person can stand when performing various functions associated with loading and unloading a trailer. The fender guard saves the fenders from damage due to individuals standing on the fenders or hitting the fenders with various loads, equipment and the like.

Abstract: A rotary displacement machine has a casing (1) having a spherical interior space accommodating a rotor. The rotor is spherical and is formed by a disc-shaped partition (2) having on either side thereof pivotally vanes (3, 4). The vanes (3, 4) are connected to the partition (2) along the diameter, extend in mutally perpendicular planes and are connected to power takeoff shafts (5, 5') extending at an angle with respect to each other. The pivotal connection of the partition (2) to each vane (3, 4) is in the form of mating cylindrical projections (9, 9' ) of the partition of the vanes (3, 4). Axes (a, b) of the projections (9, 9') of the partition (2) extend mutually perpendicularly and in one and the same plane.

Abstract: An infrared temperature sensor with a sensor element sensitive for infrared radiation and which generates an analog output signal, permits a speed-variable and resolution-variable infrared temperature measurement, in that at least one resolution-adjustable converter means is provided for converting the analog signal into a digital signal and in that a digital signal processing means is provided for the program-controlled linearization and evaluation of the digital signal.

Abstract: A motion compensated predictive coding/decoding system of a picture signal in which one frame is constituted by N.times.M pixels. The picture signal is divided into a plurality of block data each have BH.times.BV pixels. The plurality of the block data are coded/decoded with motion compensated prediction by processors, the number of which provided in horizontal and vertical directions being K and L respectively. The plurality of the block data to be coded/decoded are supplied to the processors. On the other hand, data of a former frame stored in K.times.a.times.L.times.b memories, each covering N/K/a.times.M/L/b pixels. By a bus adapter, connection between the processors and memories is switched in accordance with a block position in the frame to be processed so that the processors can access the memories that store the data required for the motion compensated prediction. Any of the memories is not connected simultaneously to a plurality of the processors.

Abstract: A method of joining the ends of a papermakers fabric wherein machine direction yarns are fringed out at the fabric ends, yarn ends being laid across a pinned plate, and yarn ends being cut back so as partially to overlie the plate. Those yarns which extend across the plate are folded back to form loops beyond the edge of the plate and a thermoplastics matrix material is applied to the plate. The matrix material is made fluid by heating and, on subsequent cooling, forms an apertured end to the fabric which presents side-by-side, outwardly extending loops. The loops at the respective fabric ends may be interdigited to receive a pintle wire, thus to bring the fabric into endless form.

Abstract: A process and apparatus for obtaining an intensive and continuous exchange of electrolyte on the surfaces of workpieces (11, 21) subjected to chemical or electrolytical treatments wherein the exchange is achieved by subjecting the workpieces (11, 21) to strong pulsating oscillations of a frequency of at least 1 Hz and of an amplitude of less than 10 mm, when immersed in the electrolyte. The vibrations are transmitted from an oscillation generator (3) mounted on a workpiece carrier, such as a rack (1, 4) or a rotating dipping drum 92). These high frequency low amplitude oscillations may be combined with low frequency, relatively long oscillations (7, 9, 10, 18), occurring simultaneously. The oscillation generator (3) is arranged on the individual transportable workpiece carriers (1, 2, 14). The workpieces may be boards (11) for printed circuits having through holes (12) or a pourable mass of parts (21).

Abstract: Centralized broadcast of a plurality of computer programs through a point to multipoint communications medium to a plurality of computers able to select, receive and execute computer programs from within said plurality of computer programs. Computer programs to facilitate the purchase of one or more computer programs from within the plurality of computer programs, and the computer programs to facilitate purchase being transmitted through the point to multipoint communications medium.

Abstract: A thermal detector arrangement includes a number of channels, each including a collimator for collimating incident radiation to a respective optical filter. Each optical filter has a respective radiation passband characteristic with one having a passband spanning the passbands of all of the other optical filters. The radiation passed by each optical filter is passed to a thermal detector, which preferably is in the form of a thermally isolating membrane acting as a radiation absorbent cavity and supported by a semiconductor substrate. The output signals from the thermal detectors are multiplexed, amplified by an amplifier having voltage offset compensation and digitally processed to provide an indication of a fire to be sensed.

Abstract: A credit card system uses an encryption algorithm to generate a first encoded text from the card number and a password supplied by the user. The card user is verified by comparison of the first encoded text with an encoded text recorded on the card. When the transaction is completed, the merchant generates a receipt containing a first verification code generated from the date and time of the transaction, the merchant's identification number, the password, and the card number. To receive payment, the merchant presents the receipt to the credit card center. The credit card center generates a second verification code from the card number, the password which is retrieved from the central database, the merchant number, and the time and date of the transaction. If the two verification codes match, the merchant is credited with the amount of the transaction.

Abstract: An intake system for a vehicle for delivering intake air through separate or discrete intake passages of the intake system into engine cylinders through discrete intake passages. A collector chamber and a resonator chamber connect with an upstream main intake passage and the discrete intake passages. The collector chamber communicates at one end with upstream ends of the discrete intake passages and at its another end, opposite to the one end, with the resonator chamber. The discrete intake passages are clustered or grouped together at their upstream ends and connected as a cluster to the collector chamber.

Abstract: An element for use in producing stabilized soil structures comprises a sheet of double-twisted galvanized and plastic-coated metal mesh which has on one end a box portion made from panel of the sheet panels and folded up from the end of the sheet and an additional transverse panel fixed to the sheet.In use a plurality of elements are superposed with the box portions providing the anterior wall of the structure and the remainder of each sheet extending back into the structure to stabilize the structure. Each element is filled and covered with fill material before a succeeding element is positioned on it.The fold lines of panels are defined by strips introduced into the mesh of sheet during manufacture.

Abstract: An automatic transmission line pressure control system controls line pressure in an automatic transmission equipped with a torque convertor for hydraulically coupling and uncoupling friction coupling elements of the automatic transmission. The automatic transmission line pressure control system regulates line pressure for selectively coupling and uncoupling the friction coupling elements so as to shift the automatic transmission into desired speed gears. The line pressure is forcibly dropped to a level lower than a level present before an occurrence of a manual shift-down operation when a shift-down sensor detects the occurrence of a manual shift-down. The line pressure is then raised as a speed sensor detects an increase in rotational speed transmitted the automatic transmission, thereby shifting the automatic transmission into desired speed gears.

Abstract: A blind for an arched window and more specifically a fan-type blind for semicircular arched windows in the form of a semicircular radially pleated member supported along its bottom edge by a mounting rail which is supported by end mounting brackets attached to a window casing. Compression plates engage the opposed surfaces of the radial pleats to partially compress the rigidify the pleats and enable adjustment of the pleats to accommodate irregularities in the window casing with the blind standing on its own without top brackets. A valance of pleated construction overlies the mounting rail and a medallion of semicircular configuration of radially pleated construction overlies a central portion of the fan-type blind.