Abstract: Method and apparatus for converting a virtual address contained in an instruction into a real memory access address, when the stored data are organized in functional sets, the latter being divided into segments. Conversion is performed by means of a functional set number register 12, a segment label table 7, a plurality of base registers 4, and a base register updating device. The invention is applicable to data processing systems.

Abstract: A hybrid integrated circuit having a partially enamelled steel support.The process starts with an unprocessed steel plate 20 which is first treated to allow bonding of a coat of enamel. Before selected areas are masked by a layer 21, for example of an organic material. After an enamel composition 22 is deposited on all areas of the plate, this deposit is then removed from the masking layer 21. The enamel is then baked at high temperature and the masking is burnt and volatilized. The selected, bared areas of the plate are metallized. They are used as areas for soldering or gluing semiconductor chips 24.

Abstract: A receiver for simultaneously transmitted clock signals of frequency F (HC) and auxiliary signals of frequency f (HS), F=kf, k=2, 3, 4, . . . , said clock and auxiliary signals being transmitted as a modified clock signal (HM) wherein one clock pulse is omitted every k clock pulses. The modified clock signal is simultaneously transmitted over three, nominally identical, transmission circuits (e.g. as HM1, HM2, & HM3). The receiver comprises the combination of a selection circuit (1) for generating a normal modified clock signal (H), even if one of the three received modified clock signals should be absent, and a signal separation circuit (2) for reconstituting both the clock signals (HC) and the auxiliary signals (HS). The receiver further includes an alarm circuit promptly detects transmission failures or impairments, even though the main portion of the circuit continues to operate properly.

Abstract: Methods and apparatus for converting time-division data signals received over an incoming trunk having v.sub.e channels into time-division data signals for transmission over an outgoing trunk having v.sub.s channels (where v.sub.s >v.sub.e).The device includes means for storing the data bits contained in each incoming frame; means for reading at an intermediate frequency f.sub.i, during read enable periods, the stored data bits corresponding to v.sub.e busy outgoing channels and for evenly distributing v.sub.s -v.sub.e free outgoing channels amongst the v.sub.e busy outgoing channels, during read inhibit periods; and means for transmitting at a frequency f.sub.s the data bits read at the intermediate frequency f.sub.i.This device may advantageously be used in PCM telephone exchanges.

Abstract: The invention relates to a clock recovery system for a data receiver. The system includes a ring counter connected to a flip-flop and a circuit for triggering the ring counter controlled by the first pulse of the transmitted signal.

Abstract: Disclosed is a device for sending a plurality of categories of signalling data over time-multiplexed channels, said device consisting of groups of circuits assigned to various categories of data wherein the inputs of each circuit are connected via a first common bus to the outputs of a clock circuit feeding time reference signals to the various channels, wherein the outputs of each circuit are connected via a second common bus to an output circuit. These groups of circuits are provided with a memory circuit for containing said data and a time reference signal decoding circuit for controlling the reading of the memory circuit for transmission of said data to a telephone exchange.

Abstract: A symmetrical, twin centrifugal pump includes a pair of valves mounted about a common shaft. The valves are capable of independent operation thus allowing either or both of the pump elements to operate. A key is also mounted to the shaft to allow overall regulation of the pump by selectively impeding the flow of liquid from the pump inlet to pump outlet.

Abstract: A digital data resynchronization device used as an interface circuit between the incoming junctions of a PCM switching center and the time division switch. It possesses a memory that contains one-bit words loaded at the rate of the incoming data and read at the rate of the local clock. As a means of avoiding conflict due to simultaneous read-and-write operations, two time slots in the local clock cycle are provided for write operations and one time slot for read operations.Application: RCM switching.

Abstract: A telephone exchange signalling unit is provided having looping means for feeding back and comparing transmitted data multiplets directly with its input data. This test is ordered by the control unit of the telephone exchange without the necessity of using wires other than the distribution and scan wires of the telephone exchange and the signalling unit.

Abstract: Apparatus for measuring atomic radiation includes a plurality of solid-state detectors, typically connected in parallel, each detector being selected such that the parallel combination has a desired response characteristic. The detectors are connected to the input of a pre-amplifier/integrator which, in turn, drives a counter via a trigger circuit. The detectors, trigger circuit and pre-amplifier/integrator may advantageously be combined on a single integrated circuit chip.

Abstract: A device for localizing neutrons is made up of modular elements placed within an enclosure which is transparent to neutrons and filled with a gas, each modular element being constituted by a series of parallel wire anodes, means for producing an electric field around each anode wire so as to give rise to charge multiplication when an electron penetrates into the field, a cathode placed in the proximity of the array of wire anodes, means for attaching the anode wires to the cathode walls and means for providing electrical insulation between the cathode and each anode wire.