Abstract: A circuitry arrangement for a resonant circuit that may be completely monolithically integrated and electrically tuned has a differential amplifier stage with two transistors T.sub.1,T.sub.1 ' fed by a constant current source I.sub.0 that are differentially loaded at their collectors by a voltage-dependent capacity and inductively loaded in relation to the circuit ground by a pair of emitter followers T.sub.2,T.sub.2 ' with electrically adjustable impedance that act upon the base. To implement the electrically adjustable impedances, transistors with associated resistances are provided (for example a pair of emitter followers T.sub.3,T.sub.3 ' with base pre-resistances R.sub.1,R.sub.1 ') which may be adjusted by control currents (for example I.sub.1 I.sub.1 ') . The voltage-dependant capacity is implemented by transistors T.sub.4,T.sub.4 ' whose short-circuited emitters and collectors are connected so that the circuit node thus obtained is applied to the circuit ground through a voltage source U.sub.1.

Abstract: A receptacle has a bottom and an articulated sidewall structure which is capable of being collapsed and positioned flat on the bottom and, to enhance the static and dynamic load capacity and for simplified handling in transport, includes sidewall retention elements arranged on a bottom frame which engage matching retention recesses in the sidewall structure when it is erected and mounted on the bottom of the receptacle.

Abstract: Switching network for digital switching systems composed of switching matrices connected parallel at the input side wherein the switching matrices contain a frame memory (R1 through Rm) per input for the acceptance of the supplied information that is cyclically written in and randomly read out. The write-in into the frame memories (R1 through Rm) is controlled by auxiliary information in the holding memories (H) supplying the read-out addresses such that the write-in respectively ensues only into that frame memory from which read-out is to be carried out on the basis of the switching network output that is to be selected. This results in lower dissipated power.

Abstract: The telecommunication network is composed to a greater degree of ATM exchanges (ATM) and to a lesser degree of STM exchanges (STM). Information coming from an STM exchange (for example, STM1) ad to be switched to a further STM exchange (for example, STMy) via an ATM exchange (for example, ATM1) are packeted in short cells for through-connection through the ATM exchange (ATM1) in order to reduce the packeting time. These short cells have a shorter length when compared to the standardized message cells used for information transmission between ATM exchanges.

Abstract: The telecommunication network is composed to a greater degree of ATM exchanges (ATM) and to a lesser degree of STM exchanges (STM). Information coming from an STM exchange (for example, STM1) and to be communicated to a further STM exchange (for example, STMy) via an ATM exchange (for example, ATM1) is packeted in message cells of the same length as those message cells used for the transmission between ATM exchanges in order to reduce the packeting time for the through-connection across the ATM exchange (ATM1). However, respective message parts of a plurality of STM time channels (K1 through K4) that are to be through-connected to the same ATM exchange output are multiplexed in a message cell.

Abstract: The telecommunication network is composed to a greater extent of ATM exchanges and to a lesser extent of STM exchanges. For reducing the packeting time for the through-connection across the ATM exchange, information coming from an STM exchange and to be switched via an ATM exchange to a further STM exchange is packeted either into message cells that are shorter in comparison to standardized message cells used for the transmission between ATM exchanges or into message cells of the same length wherein, however, respective message parts of a plurality of STM channels that are to be through-connected to the same ATM output are multiplexed in a message cell. Given local exchanges (ATM-V) having decentralized line units (SLUR) for the connection of subscriber lines, the message cells of a plurality of STM channels are packeted multiplexed thereat without taking the exchange destination into consideration.

Abstract: Line terminal groups are redundantly present for reliability reasons. The connecting through of the input lines to the switching matrix network can thereby proceed via different signal paths. In order to avoid disturbances during switch-over between signal paths, the appertaining interfaces are provided with compensation memories. The data contained in the compensation memories are written in or read out in a phase-synchronized and frame-synchronized manner with a uniform clock. The uniform clock is acquired from the electronic switching device base clock of the system. Due to transient time distortions and component tolerances, the base clock must be regenerated with the circuit arrangement of the invention before it is applied to the compensation memories.

Abstract: In a circuit configuration for clock-controlled time division multiplex telecommunications switching installations, including PCM telephone switching installations with central switching network and connected subswitching networks, line groups are connected to a central switching network via time division multiplex lines and have one subswitching network and one group control unit each are pairwise assigned to each other. Line units which are individually assigned to the one or the other of two line groups are, in normal operation, connected to the subswitching network of their own line group and can be changed over to the subswitching network of the particular other line group in standby operation. In the line units, equalizing memorys are provided in duplicate and, specifically, in each instance for the message stream to and from line group-common subswitching network, on the one hand, and for the message stream to and from the subswitching network of the particular partner line group.

Abstract: An Exclusive-Or circuit has a symmetrical arrangement of components in order to provide an identical input impedance for both input signals and to provide identical switching and signal propagation times. The circuit includes input stages (EF.sub.1, EF.sub.2 ; EF.sub.3, EF.sub.4) for receiving first and second input signals (V.sub.E1 ; V.sub.E2) and emitter followers (EF.sub.5, EF.sub.6, EF.sub.7, EF.sub.8) connected to the input stages. A current switch stage (T.sub.11, T.sub.12, T.sub.13, T.sub.14) is driven by the input stage for the first input signal, and an identical current switch stage (T.sub.21, T.sub.22, T.sub.23, T.sub.24) is driven by the input stage for the second input signal. These current switch stages are connected by load resistors (R.sub.1, R.sub.1) to one pole of an operating voltage source (U.sub.B). Another current switch stage (T.sub.15, T.sub.16), is connected between a current source (I.sub.O /2) and the current switch stage (T.sub.11, T.sub.12, T.sub.13, T.sub.

Abstract: In a circuit arrangement for telecommunications exchanges, including PCM time division multiplex telephone exchanges with a central switching array and connected subordinate switching arrays, line terminal groups connected to a central switching network by way of link connections where each line terminal group has its own subordinate switching array and a group control unit are arranged in pairs. Within each line terminal group, there is terminal equipment for connection of outside lines on the one hand, and on the other hand link terminating circuits for the link connections to the central switching array can also be switched from the subordinate switching array of the respective line terminal group to that of the partner line terminal group. Terminal equipment and link terminating circuits as well a subordinate control units with subordinate switching arrays are equipped with three internal power supply systems and three internal clock pulse supply systems per line terminal group.

Abstract: A circuit arrangement for telecommunication switching systems, including PCM time division multiplex telephone switching systems, with double central switching matrix by which two corresponding line trunk groups comprising a sub-switching matrix each and a group control unit each, are allocated to each other in pairs via two time-division-multiplex lines. The line units and the PCM-lines leading to the central switching matrix, which are individually respectively allocated to the two line trunk groups, and which are connected with the respective sub-switching matrix of their own line trunk group during normal service, are switchable, during emergency service of one of the two line trunk groups, to the sub-switching matrix of the respective other line trunk group.

Abstract: A switching configuration for PCM TDM telecommunication exchange insallations, having a central switching network and individual sub-switching networks is provided.Line groups having duplicated central switching networks connected over two time division multiplex lines and having a sub-switching network and a group control system each are assigned to each other in pairs. The line systems assigned individually to the one and the other of two line groups and which are connected via internal lines in normal operation to the sub-switching networks of their own line group, can be switched over to the sub-switching network of the other line group. No connections are interrupted which were already through-connected before changeover switching or were in the process of being set up, and the internal lines running form the line system of one line group can be switched over singly, i.e. individually to the connection, from its sub-switching network to that of the partner line group.

Abstract: A device that serves to actuate a throttle valve. The actuating device includes an electric drive motor and a step-down gear driven by the motor; an output shaft of the step-down gear is operatively connected to a throttle valve shaft which controls the throttle valve. The actuating device is compact in structure as well as versatile in use, even with various sizes of throttle valve, the step-down gear is embodied as a planetary gear having its output shaft provided with a gear wheel, which is operatively connected via a toothed belt with a second gear wheel, disposed on the throttle valve shaft. The motor is controlled by a control means assembled in the same housing as the motor and the throttle valve.

Abstract: The switching network is tested by comparison of bit streams coming from the double part switching network parts; other parts of the exchange are tested by parity checking. Evaluation takes place at a central location; when a parity error is found in the transmission in a direction of transmission, the parity bit generated for transmission in the other direction of transmission is falsified.

Abstract: A system for regulating pressure in a container. The system includes a membrane pressure regulator with a reference pressure chamber containing a reference pressure, and a vacuum pump connected to the container via the membrane pressure regulator. The system further includes a gas inlet valve connected to the reference pressure chamber for increasing the reference pressure; a gas outlet valve connected to the reference pressure chamber for decreasing the reference pressure; and a regulator connected to the gas inlet valve and the gas outlet valve for actuating the valves. The regulator includes a device for generating a desired pressure value for the container and a measuring member connected for providing an indication of the pressure in at least one of the reference pressure chamber and the container.

Abstract: The downward burning of a vertical stack of solid fuel in a vertical furnace shaft is controlled by supplying most of the combustion air to the side of the stack through vertically spaced apart rows of combustion air supply openings in the vertical furnace shaft, each row of combustion air supply openings being generally horizontally oriented and including a plurality of separate openings. Each row of combustion air supply openings is supplied with combustion air through a separate combustion air supply channel, and the combination air fed to each supply channel is controlled by a distribution element which shifts the supply of combustion air to lower rows of air supply openings as the combustion zone moves down to the bottom of the vertical stack.

Abstract: An adjusting device for adjusting a stop lever coupled with a control device of an internal combustion engine. The adjusting device includes a housing having an electric motor which via a worm gear rotates a gear wheel. An internal thread is provided in an inner bore of the gear wheel and is engaged by the external thread of a spindle. The spindle is joined to an actuating sleeve and on one end has struts extending in the axial direction, which protrude into guide grooves of a short tubular portion of the bottom part of the housing and are displaceable therein in order to secure the spindle against rotation. A feeler is slidably disposed in the actuating sleeve and when the stop lever of the control device is in contact with the feeler, the feeler closes switch contacts which communicate via wiper fingers with contact paths, which are disposed on a protuberance which extends into the spindle.

Abstract: A method for the processing of values measured in a gas friction vacuum meter, in which the pressure is determined by the drag on a magnetically suspended free ball, by forming a first time value t.sub.n-1 by measuring the time required for N/2 periods of revolution of the ball, and a second time value t.sub.n by the immediately following measurement of the time required for another N/2 periods of revolution of the ball, determining a pressure value by comparing the two times values, repeating this pressure value determination of two time values after each period of rotation for the same number N of periods of revolution of the ball to a total of z determinations, and displaying the average of the pressure value determined Z times. To be able to determine the pressure with optimum measurement times and uncertainties of measurement, the ratio of N to Z is selected at approximately 4:1.

Abstract: A calibratable voltage divider made by thin-film or thick-film technology formed by a flat film is an ohmic voltage divider resistor connected to have current flow through it. At least one tap is provided to tap off a desired divider voltage. The ohmic voltage divider resistor includes a single, coherent first resistance zone (10), which has one area for supplying current and another for taking current away, each being connected with a respective connection conductor (11, 12). The tap is made in the form of a second resistance zone (13) connected with the first resistance zone (10) between the current supply, and current drainage areas, and a take-off electrode (14) is attached to the second resistance zone (13). As needed, one or two cuts (16, 17), which intersect the equipotential lines are made to partially separate the second resistance (13) from the resistor (10) zone extended far enough that the potential attains the desired value at the take-off electrode (14) of the tap.

Abstract: A printing press is provided with a safety device mounted in the vicinity of a gap formed between two counter printing rollers for preventing the gap from intrusion by foreign elements, such as a mop or the hand of an operator. The device includes a four-link transmission unit operatively interconnected between pivotable guard plates and a cam switch adapted to actuate an end switch of the printing press to shut the latter off. The guard plates are swung away from the rollers so that the gap is enlarged.