Abstract: A device for holding a slider in position during threading onto a slide fastener chain includes a housing having a support surface for supporting thereon a slider body upside down, and a slit receptive of a pull tab hanging from the slider body. A lever has a pair of juxtaposed first and second arms disposed one on each side of the slit, there being on the first arm a locking projection movable into and out of the slit. The lever is pivotable in the housing between a slider-holding position and a slider-release position. The second arm extends beyond the first arm to such an extent that as the slider is placed on the support surface, the second arm is pressed downwardly by a yoke of the slider to cause the lever to be pivotally moved to the slider-holding position.

Abstract: In an exemplary embodiment, a radiation detector for reception of the radiation emerging from the radiography subject delivers electric output signals corresponding to the received radiation profile, a scanner device rotates the radiographic unit about an axis which passes through the focus of the x-ray tube and approximately through the detector center, and a measured value processing and display unit determines and reproduces the x-ray shadow image corresponding to the scanning movement of the radiographic unit (1, 4). The processing and display unit is designed in the manner of a radar display apparatus in which a number of concentric image point circles are recorded, each of which, (for the case of a radiation detector consisting of a series of individual detectors), is locally associated with a specific individual detector and is modulated in its intensity corresponding to the output signals of the associated individual detector.

Abstract: A time-division multiplex switching network is constructed of units designed as time stages which operate blocking-free and which are multiply divided. A plurality of units of identical structure to a plurality of switching units of a switching network portion is assigned to each switching network portion, the plurality of units being operated as multiplexers at which the outgoing time-division multiplex lines are connected and whose normally non-utilized outputs can be connected by way of switches to other time-division multiplex lines extending from other switching network portions. Upon failure of the latter switching network portions, the switches are closed for rerouting the traffic through the system.

Abstract: Nail files and other abrasive articles have a structural base, such as a steel strip, coated with a slurry of a resin, such as an epoxide, and abrasive particles or grits, such as aluminum oxide, granules with sharp peaks and corners, of selected size and covered with one or more layers of electroplated metal, such as copper, nickel and chromium, forming a sheath surrounding the coated base and firmly anchoring the particles around the base. The electroplated metal has relatively thick valley portions covering the bases of the particles but only has relatively thin films over the peaks of the particles. In use, the thin coatings over the peaks of the particles are broken off, exposing the tip ends of the abrasive particles for effective abrasion of surfaces, such as fingernails, rubbed thereover.

Abstract: A fluid pumping agitator for use in a vertical axis automatic clothes washing machine which pumps wash liquid from a central inlet communicating with the tub to an outlet communicating with the basket to reduce the volume of liquid required in a washing cycle. The agitator pumps liquid in both directions of its oscillatory rotational movement.

Abstract: An inventive method for producing a laminated molded countertop includes the steps of placing the surface laminate material into a mold, applying a layer of polyurethane foam to an interior side of the laminate material, applying a reinforcing member, if necessary, on top of the layer of polyurethane foam, applying a second layer of polyurethane foam over the reinforcing member and closing the mold. A resultant molded article has an exterior surface laminated thereto due only to the forces generated by the polyurethane foam during the time when it is expanding and solidifying.

Abstract: A circuit for operating recording nozzles in ink mosaic recorders, each nozzle having an associated ink channel cylindrically surrounded by a piezoelectric transducer having a diameter which expands upon the application of a voltage thereto having a polarity which is opposite to the direction of polarization of the transducer and contracts upon the application of a voltage having a polarity in the direction of the transducer polarization, has a charging circuit which connects the transducers in a rest state to a common voltage source having a polarity in the direction of polarization of the transducers so that the transducers assume a state of contracted diameter. The circuit further includes a discharging circuit operated by a control input for each transducer operable for discharging an ink droplet from the nozzles after ink is drawn into the channels by operation of the charging circuit.

Abstract: An optical arrangement for a light scattering type smoke detector has a radiation transmitter and receiver which are each preceded by a lens for obtaining a generally parallel field of view for each of the transmitter and receiver. The radiation is directed at a detection zone which is surrounded by diaphragms and the fields of view for the transmitter and receiver terminate in a light trap for preventing unwanted scattering and reflection. The transmitter and receiver are disposed at an acute angle with respect to each other and the receiver detects only back-scattered radiation from smoke particles in the detection area. This structure allows a relatively short structural length to be utilized along a common optical axis of the transmitter and receiver.

Abstract: A circuit arrangement determines the identity of a repeater in a telecommunications systems, in particular a telephone system, which, either individually or as one of several of a group, is permanently assigned to a specific zone of origin which is individually characterized by an incoming connection line. During establishment of a telephone connection, in particular an international telephone connection, or a connection foreign to the particular exchange, identification can be made individually in dependence upon the zone of origin of the calling subscriber and a control path, which serves to exchange signals, and which leads to a translator is established. The translator supplies, inter alia, information, for the ongoing connection establishment and for the assignment of a charge pulse train.

Abstract: For formation of features for automatic character recognition an image pattern memory matrix corresponding to a respective character is read-out analogous to a sampling at different sampling angles with a multitude of section lines proceeding in accordance with said sampling angles. The evaluation per sampling angle ensues in such manner that there are determined and supplied to a classifier for character recognition the number of the section lines intersecting the character at least once (sampling range); the sum of all section line intersections; the center of gravity of the sampling range; and the scatter within the sampling range.

Abstract: A lens module for use in an opto-electronic range finder double ray deflection for the projection of two images of an object onto two linear image sensors disposed in a single image plane has a prismatic body having a trapezoidal base with a V-shaped notch in a central area of the longer of the parallel trapezoid sides of the base. The surfaces of the notch are substantially parallel to the nearest non-parallel trapezoid side. A projection from the shorter parallel trapezoid side has a pair of light exit ports leading to the respective image sensors and a pair of light inlet ports are disposed at opposite ends of the longer parallel trapezoid side.

Abstract: A switching apparatus for PCM or video signals is disclosed which includes a circuit detecting the information inherent to a PCM signal and discriminating whether the signal recorded on a record medium is the PCM signal or video signal and a circuit automatically switching the PCM signal and the video signal.

Abstract: A digital-analog converter functioning according to the .mu.-law wherein a sequence control receives an input digital signal and controls the position of a plurality of switches so as to selectively apply positive or negative voltages to a main resistor network and an auxiliary resistor network and further controls the plurality of switches in such networks for either grounding or connecting to an operational amplifier the outputs of said main and auxiliary resistor networks so as to produce an analog output signal. The invention is useful in time division multiplex telephone systems with digital subscriber stations, for example.

Abstract: A monolithic static memory cell has two cross-coupled inverters each comprised of a series connection of a field effect switching transistor and a load element designed as a field effect transistor. The field effect transistors forming the load elements have their channel resistances of different values. A gate insulating layer of one of the load element field effect transistors has its charge state altered, preferably by electron beam writing, so that a change in a threshold voltage of the one transistor results in a change of its channel resistance relative to the channel resistance of the other load element transistor if it was under before the selective altering, or vice-versa.

Abstract: A housing for a radio transmission receiver for very high frequencies, specifically for the 30 GHz range. The housing contains alignable antennas for dual directions. The housing is water-tight and contains a complete transmitter-receiver so that only modulation signals and a feed voltage are supplied from the outside. A compact and electrically efficient internal format, particularly of the radio frequency unit, is a principle feature of the invention.

Abstract: A tape joint for cylindrical members is provided wherein a flexible tape member is inserted into a cavity between telescoping first and second cylindrical members in a twisted manner so as to lock the members together as a unit. The tape member is manually slip fitted into position and is provided with a handle for aiding in the insertion and removal of the tape member.

Abstract: The magnetic recording media are constructed such that a lubricating layer containing an amine compound represented by the formula: ##STR1## (wherein R is a hydrocarbon residue having from 7 to 21 carbon atoms and n is an integer ranging from 1 to 10) is disposed on at least one surface of a non-magnetic substrate with a magnetic layer. The magnetic recording media have an improved lubricating characteristics with a low friction coefficient.

Abstract: A screen apparatus for processing stock flowing into a papermaking headbox which includes a cylindrical housing, a tubular screen mounted longitudinally within the housing, and inlet means for introducing a stock suspension into the housing for flow through the screen. Outlet means are provided for receiving the suspension passing through the tubular screen for delivery to the headbox. The improvement of the present invention provides a helical slot in the housing which discharges stock passing through the screen into the outlet means. Foil means mounted for rotation coaxially with the cylinder are provided which create a pressure pulsation to cause a dispersal of the fibers and aid in the screening operation.

Abstract: A method of preparing gamma ferric hydroxyoxide in which ferrous ions are reacted in an alkaline solution to produce a suspension of ferric hydroxide, the resulting suspension is treated with an oxidizing gas in a first oxidizing step at a relatively high oxidation rate, sufficient to cause nucleation of gamma ferric hydroxyoxide to occur, and then the oxidation rate is reduced in a second oxidizing step to cause crystal growth to occur on the nuclei formed in the first oxidizing step. The resulting product has magnetic and physical characteristics making it extremely suitable for use in the manufacture of magnetic recording media.