Abstract: A voltage regulator for regulating a power source that supplies an input signal includes input terminals connected across the power supply, a voltage sensor, a reference generator, a variable load unit, and a control unit. The voltage sensor is connected across the input terminals and receives the input signal and generates a scaled input signal from the input signal that is a fraction of the input signal in magnitude. The reference generator receives the scaled input signal from the voltage sensor and generates a reference signal. The variable load unit is connected across the input terminals. The control unit receives and compares the scaled input signal and the reference signal and instructs the variable load unit to dissipate a first portion of the input signal if the scaled input signal exceeds the reference signal.

Abstract: In a circuit arrangement for line units of an ATM switching equipment unit, it is possible with the assistance of the respective line unit to separate one or more virtual connections carried in a virtual path proceeding thereover from a virtual path proceeding thereover. For this purpose, the connection to be respectively separated has route information allocated to it with the assistance of a memory arrangement that is present in the respective line unit and is formed of a content-addressable memory (CAM) and of a following random access memory (RAM), the route information deviating from the route information of the virtual connections that continue to be carried in the corresponding virtual path.

Abstract: A transient voltage surge suppressor (100) for use in a single or poly-phase power distribution network to protect equipment supplied power from the network from damage caused by line surges or transients. A plurality of surge suppression assemblies (102A-102G) each of which includes a plurality of semiconductors (114) connected in parallel and a fuse wire (118) connected in series with each semiconductor. Each assembly is mounted on a separate circuit board (126A-126G). A fault detection circuit (104) in each assembly includes both a sensor (132A-132G) for sensing when a semiconductor in one of the surge suppression assemblies fails, or when a fuse wire in one of the assemblies clears, and a circuit (152) for providing a visual indication thereof. The fault detector is mounted on a separate circuit board (131).

Abstract: A transient voltage surge suppressor (10) is used in a single or poly-phase power distribution network (P). The surge suppressor connects in parallel between each phase (A, B, C) and neutral (N), each phase and electrical ground (G), and between neutral and ground. An improvement comprises an electrical circuit (30) for monitoring the loss of surge protection due to the occurrence of a current surge or voltage transient in a neutral-to-ground path (32). An MOV-type semiconductor (VR1) is connected in the ground-to-neutral path. The semiconductor is normally non-conducting, but switches into conduction when its voltage threshold is exceeded by a surge current or voltage transient. An excessive surge or transient causes the semiconductor to fail. Respective fuses (F1A, F2B) are connected in series with the semiconductor. These fuses clear (blow) upon a semiconductor failure to create an open circuit neutral-to-ground path.

Abstract: The message cells of a virtual connection appear with a transmission bit rate that is higher in comparison to a transmission bit rate respectively defined for inputs (E1, . . . ,EP) and outputs (A1, . . . ,AP) of an ATM network. These message cells are depacketed. The message signals contained in successive message cells are thereby subdivided into signal sections. Upon attachment of a continuously changing signal section sequence number, these are respectively inserted into the information part of a message cell. The message cells are then transmitted via different transmission routes within the ATM network and are subsequently depacketed. Based on the measure of the signal section sequence numbers contained in these message cells, message signals in the original length are in turn formed from the individual signal sections, these message signals being inserted into message signals of the appertaining virtual connection for forwarding.

Abstract: An fuel or control assembly for a nuclear reactor includes an elongated case having a longitudinal axis, side walls extending parallel to the axis and defining an interior with a polygonal cross section, two ends, a rim, and at least one case opening being surrounded by the rim at one of the ends. The side walls have inner surfaces with a groove-like profile being machined therein and extending at a predetermined distance from the rim. A bundle of rods parallel to the axis or an elongated absorber body is disposed in the interior of the case. An end part has lateral surfaces extending parallel to the axis and being adapted to the polygonal cross section of the interior. The end part has corners disposed between the lateral surfaces being rounded and shaped in the axial direction to form dovetail-like protrusions.

Abstract: A coaxial cable (10) is for use in a power distribution network (N). The cable connects a surge protective device (SPD) in parallel with feeder lines (W1, W2) of the network. The SPD senses voltage surges on the feeder lines and clamps the voltages to a level at which loads (LD) connected downstream of the SPD are protected from excessive voltage levels. An inner conductor (12) and an outer conductor (14) have a dielectric material (16) separating them. The inner conductor is a round conductor, and the outer conductor forms a hollow cylinder in which the inner conductor and insulation material fit. A ratio of the inner diameter (D) of the outer conductor to the diameter (d) of the inner conductor is approximately 1.05. Thus, the diameter of the inner conductor is relatively large compared with the inner diameter of the outer conductor. A relatively large diameter of the inner conductor serves to minimize the dc resistance of the cable. Also, the dielectric material has a permittivity in the range of 2.0-4.0.

Abstract: In a method and circuit arrangement for transmitting a continuous bit stream upon involvement of an ATM network, the continuous bit stream appears with a transmission bit rate that is greater than a transmission bit rate respectively defined for inputs (E1, . . . ,En) and outputs (A1, . . . ,An) of the ATM network (KE). This continuous bit stream is subdivided into signal sections that, with respect to their bit plurality plus a defined plurality of information bits, correspond to the plurality of bits transmittable in the information part of a message cell as useful signals. In successive control cycles, a plurality of signal sections corresponding in number to the bit rate ratio of the appertaining transmission bit rates are respectively inserted into the information part of a message cell with a signal section sequence number that continuously varies attached to them.

Abstract: A fuel assembly for a boiling water reactor includes approximately mutually parallel fuel rods in a bundle having upper and lower ends. A skeleton holding the bundle has a handle, an upper tie plate retained on the handle at the upper end of the bundle, a lower tie plate at the lower end of the bundle, and at least one support element joining together the lower tie plate and the upper tie plate. The skeleton and the bundle are inserted in a fuel assembly case. A redundant support device holds the lower tie plate, the fuel assembly case and the upper tie plate together, when the handle is lifted.

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: A hydraulic control rod drive for a nuclear reactor, with a a reactor plenum enclosing the drive, comprises first and second hollow bodies together forming a cylinder and a hollow piston. Working fluid is supplied through one of the hollow bodies. The first hollow body is stationary and the second hollow body is disposed coaxially around the first hollow body. The two hollow bodies define an annular gap therebetween so as to allow axial reciprocating movement of the second hollow body, which forms a carrier body for control elements of the control rod. The second hollow body can be lifted, lowered or suspended by feeding working fluid. A portion of the fluid is removed from the inner space via a throttle passage. A positional measurement system determines the relative displacement of the second hollow body by measuring an ultrasonic measurement path. The system includes an ultrasound reflector and an ultrasonic transducer rigidly mounted remote from the ultrasound reflector.

Abstract: For reducing the loss of message packets that are transmitted according to an asynchronous transfer mode during the course of virtual connections and which comprise a packet header identifying the respective virtual connection and that are respectively augmented by a sequential auxiliary identifier and that, after multiplication, or transmitted separately via redundant switching matrices of a packet switching equipment, message packets that follow a respective faulty-transmitted message packet are intermediately stored, and that, following the transmission of an error-free message packet which corresponds to the respective faulty-transmitted message packet via a switching matrix that respectively transmits more slowly, the intermediately-stored message packets are forwarded in rapid succession.

Abstract: In order to reduce the loss of message packets that are transmitted in the course of virtual connections in an asynchronous transfer mode and which comprise a packet header identifying the respective virtual connection, the message packets being respectively augmented by a continuous auxiliary identifier and, after multiplication, being separately transmitted via redundant switching matrices of a packet switching equipment, it is provided that, with reference to the auxiliary identifier, only that message packet transmitted without fault as a first of the multiplied message packets and having an auxiliary identifier that is the next one following the most recently-transmitted message packet is forwarded. In addition, that switching matrix by way of which the transmission of message packets respectively occurs most slowly is identified and message packets that are transmitted via the respective slowest switching matrix as the first of the multiplied message packets are forwarded.

Abstract: A nuclear reactor includes a pressure vessel enclosing a plenum, a core in the pressure vessel, a pressure-tight encapsulation in the pressure vessel communicating with the plenum, and control members passing through the encapsulation and having first and second control member segments. The second control member segment has an absorber part to be at least partly inserted into and retracted out of the core for controlling reactivity. The first control member segment has an outer drive part. A control drive is associated with the outer drive part for adjusting the control member along the longitudinal direction thereof. An antieject device for restraining ejection of the control member out of the pressure vessel due to a leak at the encapsulation includes a rod coupling having a disengageable coupling catch interconnecting the first and second control member segments and remaining in engagement during normal control motion of the control member and means for unlocking the coupling catch.

Abstract: A local bus network is constructed in a star configuration and comprises transmission direction-associated star lines, the transmission channels leading from the peripheral stations to the central star point being respectively monitored at the star point for the appearance of a channel state signal transmitted from the respective station and identifying the transmission channel as busy or free. The useful signal transmitted in the transmission channel is thereby only forwarded after recognition of a "busy" signal, whereas the appertaining transmission channel is otherwise inhibited at the central star point at the receiver.

Abstract: With the switching node at least one coupling element is associated which has a number n of input lines and n output lines optionally connectible to the input lines via a space switch with a buffer store being assigned to the input lines in which k data packets occurring sequentially on the particular input line are storable before being routed further to the output lines indicated by the address signals contained in the particular data packet. The buffer stores have each a plurality m.ltoreq.k output terminals via which simultaneously m data packets stored in the particular buffer store and to be routed further to m different output lines are suppliable to a space switch having m.times.n input terminals and n output terminals.

Abstract: For the establishment of vertual connections passing through switching matrices of a multi-stage switching system, it is provided that upon the arrival of a call packet requesting the establishment of a virtual connection, a central control device identifies all the switching matrices involved in the connection to be established and determines setup information that must be assigned to each of them in order to establish the connection. This setup information is fed to the individual switching matrices from the central control device in a setup packet along the path of the virtual connection to be established.

Abstract: A hydraulic control rod drive for a water-cooled nuclear reactor includes a control valve assembly outside the reactor pressure vessel for influencing the fluid quantity on the pressure side of a fluid pump assembly for adjusting control rods in raising and lowering directions and to maintain a control rod position.