Abstract: In a tension-proof connection for optical waveguide cables, a metal sleeve (4) containing several longitudinal slots (8) separated from each other is slid over the stripped length of the cable ends. Reinforcing fibers (3) are led out through the longitudinal slots (8) and are present on the metal sleeve (4) in a stretched condition. A shrinkage hose (7) shrunk onto the metal sleeve (4) fixes the reinforcing fibers (3) on the sleeve surface (4). Over the course of their stripped length, the optical waveguide cores (2) are conducted helically in slots of spacers (6) located on a central element (1).

Abstract: For a flat display device, a control subassembly is needed which consists of two control plates (1;7) each formed by a layer of parallel conductors (2;8) which are isolated from each other. During the manufacture of the control subassembly, the first control plate is provided with a glass frit in the form of continuous strips (10) perpendicular to the conductors. The glass frit is set, and the application of the strips is repeated. The second control plate is then put on the first control plate in such a way that their conductors are mutually perpendicular. After that, the glass frit is crystallized.

Abstract: Information transmission networks with a synchronous hierarchy of digital signals, require that digital signals of the plesiochronous hierarchy are to be inserted into multiplex elements with prescribed pulse frames. The pulse frame is structured word by word, but a larger or smaller number of bits must be stuffed in a bitwise manner at the end of specific words. A multiplexer for the resolution of such a pulse frame and elimination of the stuffing bits are provided. The multiplexer operates in a word-by-word manner and repeats the replaced bits of the digital signal at the starting bits of the next word. In a similar manner, the demultiplexer also operates word by word and eliminates the stuffing bits contained in a word, by overwriting them in an elastic memory during writing-in of the next word. In both cases, this is achieved by a controllable shift of memory addresses.

Abstract: A multi-band antenna is adapted to receive signals in the AM/FM bands and to receive and transmit signals in a significantly higher frequency band such as that used for cellular telephone. An AM/FM band antenna is formed of a tubular rod, and a higher frequency band antenna is formed using a centerfed coaxial dipole mounted on top of and coaxially with the AM/FM antenna. The dipole is fed by a coaxial rod attached to a coaxial cable extending through the AM/FM antenna. A cylindrical choke is disposed about the coaxial rod and is spaced a predetermined distance from the dipole antenna to reduce coupling between the AM/FM antenna and the high-frequency antenna. The choke functions to position the input impedance of the high-frequency antenna at the base of the choke in a manner so that a short matching transformer may be used at the base of the choke for connection to the coaxial cable.

Abstract: A black-white liquid crystal display (10) contains a nematic liquid crystal with a twist of 270.degree. between cell plates. The product of the liquid crystal layer thickness and anisotropy of the refractive index is about 0.38. A pretilt of about 15.degree. is present. The polarization directions (P1, P2) have an angle .beta. of 45.degree. to the orientation directions (Mo, Mu). This display features a very wide viewing angle range with relatively little dependence of the contrast on the viewing angle and there is an almost complete absence of color shift depending on the viewing angle. Due to the significant enhancement in viewing angle range in relation to contrast and color neutrality compared with all known cells, the display is called "Extended Viewing Angle" display (EVA display). It has a very high multiplexability.

Abstract: An integral battery cover and adjustable stand for securing a battery and for providing a stand for a battery-powered display device comprises stand legs which, in one configuration, provide a stand such that the display device has a viewing angle of approximately 45 degrees with respect to the desk top surface. The battery cover/stand further comprises retaining ribs which cooperate with corresponding retaining grooves in the display device. The retaining ribs and grooves allow the battery cover/stand to be easily adaptable to one of three variations, each allowing the display device to have a different viewing angle.

Abstract: A transmission network nodes, including electronically controlled distributors so that, in the case of a failure of a path, a substitute path can be switched in very rapidly. Switching orders sent to the nodes from a controller include an unambiguous designation of the digital path to be switched, and the source network node passes this designation on to the subsequent network nodes, so that the subsequent nodes can check their switching. Alarm signals which are normally passed on transparently from node to node are converted to a substitute digital signal (EDS) with a standardized frame structure so that the alarm can be transmitted to the end of the path without issuing alarms at each node. The unambiguous path designation and the substitute digital signal (EDS) may both be transmitted without interfering with each others.

Abstract: A method of manufacturing luminescent screens (2) for, e.g., color picture tubes is described. It uses a printing apparatus with heated printing blocks (3) and tampons (4). The printing inks (D) consist of a mixture of a hot-melt adhesive and the respective luminescent materials. The printing inks are printed from the printing blocks directly on the inside of the faceplate (1) of the color picture tube. It is also possible to first print a black matrix (M) of a ceramic glass color.

Abstract: For use with agricultural sprayers, a unique spray shield is disclosed. The shields are mounted in pairs along the wet spray boom fore and aft in approximately the same plane, thereby shielding the nozzles of the sprayer. The shields are elongate and each is equipped with an air intake opening facing away from the wet spray boom. An air outlet of smaller cross-section is located at the bottom of each shield. As the sprayer moves in a direction against the wind, air enters the intakes of the fore shields and is directed downwardly and outwardly at a greater velocity thereby producing a curtain of air immediately in front of the sprayed area, thereby breaking the wind and avoiding disruption of the spray. Similarly, on the return passage over the land when the wind is blowing from the rear of the implement, the spray shields on the rear of the spray boom entrap the air and turn it downwardly, again creating a curtain of air behind the sprayed area.

Abstract: There are time-division multiplex communication systems in which digital signals which are asynchronous with the pulse frame and consist of successive blocks whose beginnings are marked with sync words are inserted into the pulse frame. The resulting jitter of the sync words ("waiting-time jitter") is reduced by a circuit which derives from the clock of the received sync words a sync signal (SY) that exhibits less jitter than the clock of the received sync words. According to the invention, the circuit contains a measuring device which measures the time intervals (N) between the sync words, a filter (F) which takes the average (N') of the time intervals (N), and a signal generator (S) which forms the sync signal (SY) from said average (N') in such a manner that the pulse period of the sync signal (SY) is equal to said average (N').

Abstract: A controllable amplifier, which has two symmetrical outputs, at which two output signals mirror-symmetrical with respect to each other are present, is used for amplification of a burst signal. To achieve the largest possible eye opening of the signals to be fed to a comparator, a predetermined d.c. voltage difference for the formation of matched signals is adjusted for both output signals. After this, the arithmetic mean values of the two matched signals are formed and are fed to a second comparator. The output value of the second comparator is fed to an integrator, to which a reference voltage is also fed. In case of a deviation of the mean values of the two matched signals from each other, the amplifier is adjusted in a compensating direction by the integrator.

Abstract: A serial transport frame format is described which transfers data between two locations. The serial transport frame format comprises a fixed number of channels per frame, each channel having a predetermined size. One channel per frame contains frame synchronization information and each channel which conveys data, contains a first portion for the transfer of data and a second portion which contains associated control information.

Abstract: A transfer strobe delay stage selector insures accurate transfer of data from high speed circuitry to low speed circuitry through use of a delay stage module comprising a plurality of delay stages, and an associated multiplexor for selecting one of the delay stages so as to provide accurate reception of parallel data by the low speed circuitry from the high speed circuitry. The transfer strobe delay stage selector incorporates a synchronization channel identification module for detecting synchronization channel information in the frames of data transferred from the high speed circuitry to the low speed circuitry and also includes control circuitry for adjusting the selected delay stage until synchronization channel identification is detected.

Abstract: A system that provides a signal in an assigned time slot of a multi-time slot repetitive frame, the assigned time slot being determined by input data that changes only on occasion, includes a flywheel circuit for reducing the chance that intermittent errors in the data input may cause the signal to be provided in an incorrect time slot. The flywheel circuit includes a time slot counter synchronized to provide a zero count during the assigned time slot and to initiate an output signal whenever the zero count occurs. The timing of a particular count of the counter is compared to the timing of the signal from the system during each frame, and if the timing does not correspond in a predetermined manner for a predetermined number of consecutive frames, the counter is re-synchronized to the timing of the signal from the system.

Abstract: Modular resonant cavities particularly for use in applications associated with high frequency electromagnetic energy each comprise a shell defining an aperture formed therethrough, and either end plates and/or divider closure plates, each having stepped-down regions for interfitting at perimeter ends of adjacent shells so as to form a resonant cavity. The modular resonant cavities include support rods passing through the corner regions of each closure plate. Fastening means at each end of the rods mechanically secure the modular resonant cavities together.

Abstract: For controlling the level of electrical signals a circuit arrangement is formed with two series connected amplifiers. A first amplifier containing a first variable resistor, operates at maximum amplification when a low input signal level is received. A second amplifier comprises a series connection of a second variable resistor and a current-controlled voltage source with two complementary outputs. The outputs of the voltage source are connected to a comparator and a controller with two separate outputs. One of the controller outputs transmits a control signal while the other output simultaneously transmits a blocking signal. A first output of the controller is connected with the first variable resistor, while a second output of the controller is connected to the second variable resistor.

Abstract: A pulling eye assembly for optical fiber cables is formed of a housing having a gripping device for gripping the multiple strength members. The first embodiment uses longitudinally extending cavities which communicate with radially directed threaded set-screw holes for receiving epoxy and/or set-screws. In the second embodiment, a pair of collets are used to grip the strength members. In both cases, a crimping sleeve is attached to an end of the cylindrical housing and being crimpably engageable with an outer surface of an optical fiber cable.

Abstract: A thermally controlled equipment cabinet for telephone systems has a gas-tight, sealed compartment for mounting sensitive active electronic components and has jacket 20 partially encompassing at least three sides of the sealed compartment. The sealed compartment utilizes either forced or natural convection to dissipate the heat generated by the components to the surrounding air. The heat is then dissipated to the ambient air through a highly heat-conductive corrugated roof and side panels. The jacket provides a cooling air passage around the sealed compartment and over the corrugated roof removing heat thereof. Nonsensitive passive components, mounted in the cooling air passage near the air inlet of the jacket, provide protrusions in the cooling air passage causing a slightly turbulent air flow in the passage thereby enhancing heat transfer. Storage batteries, such as used in telephone systems, are mounted within the cooling air passage near the air exhaust of the jacket.