Abstract: Various systems for improving the useful signal to noise ratio of signals received on different aerials and for use when the noise comes from an external source so that the noises received by the different aerials are at least partially intercorrelated are disclosed with compensating delay newworks for making the different useful signals identical with each other, in conjunction with an assembly, which takes on any one of numerous forms, for causing those identical signals plus their respective noise signals to undergo phase and/or amplitude modifications so that the intercorrelated noises come closer to the conditions of equality of amplitude and phase opposition than the useful signals themselves. The so modified signals are then added so as to eliminate the equal amplitude phase opposed noise signals.

Abstract: Copying and telecopying device using a mechanism ensuring the analysis of a document by a scanning beam which, transmitted from the document, is sent to a drum coated with selenium. According to the invention, the equipment is completed by a laser source whose beam can be directed along two parallel incident paths, to a helical mirror, one of the beams being used for the analysis of the document and the transmission of the information at a distance, the other beam being modulated by a facsimile signal and being directed onto the drum coated with selenium.

Abstract: An apparatus consisting in forming, with the oxide to be sprayed on, a plasma in an arc state within a source cavity. The state is stabilized by various known methods but which are well-adapted and the substrate to be covered is preferably kept at a predetermined distance, in order of 50 cm, from the source cavity.A positive pressure gas is supplied to the source cavity and vacuum pressure is maintained in the enclosure supporting the substrate facing the cavity opening to deposit oxide uniformly at high speed.

Abstract: Phase modulator enabling the ratio of parasitic waves to be reduced and the precision on the phase shift to be increased, comprising two microwave frequency diodes connected to voltage supplies such that the diodes are each rendered conductive or blocked in phase opposition with one another, the two diodes being respectively arranged in two paths having different electrical lengths for ensuring the phase shift, and two or four circulators enabling the main waves to issue at the output of the modulator and the parasitic waves to be dissipated in matching loads.

Abstract: The invention comes within the field of multiplex digital transmissions. It concerns a device for multiplexing n digital plesiochronous trains into a more rapid digital train, comprising n channel elements for synchronizing together the plesiochronous trains by adding of extra bits called "justification bits" and a multiplexing element for sending out, from the synchronized trains, the rapid multiplex train. According to the invention, each of the channel elements comprises means for inserting, at a determined location place in the corresponding synchronized train, a justification request signal, the said multiplexing element comprising means for reading each of the n justification request signals and controlling the insertion in the multiplex train of justification indicator bits and means for giving, if required, to the corresponding channel element, the permission to effect a justification.

Abstract: Switching circuitry for transferring data from an input time-division multiplex system to an output time-division multiplex system includes a transfer circuit for temporarily storing the data received from the input-time-division multiplex system prior to its transfer to the output time-division multiplex system. For controlling the selective transfer of data from an input channel of the input time-division multiplex system to any one output channel of the output time-division multiplex system control circuitry is provided which controls the storage of the input channel data in a selected position of the transfer circuit with a timing corresponding to the respective time slots of the input channel and controls the transfer of that data from the selected position in the transfer circuit to the output time-division multiplex system with a timing corresponding to the respective time slot selected output channel.

Abstract: The invention relates to a device for designating an element of an image in a display assembly. The device comprises a system providing the coordinates of a marked element of the displayed image, comparator receiving the coordinates of the marked element and receiving from a vector generator the moving coordinates of successive elements of the image while refreshed, and a register controlled for load by simultaneous coincidence the two pairs of coordinates for receiving the address of the marked element from an address counter associated with a memory recording the data that define the image. The invention also relates to an assembly for displaying information from a data processor on a scanned display screen.

Abstract: The invention comes within the field on n-way pole switches intended more particularly for the switching of high-frequency currents. It concerns a switch formed by the assembly of individual modules containing a micro-relay whose make contact ensures the selection of a determined direction. The modular switch according to the invention is used to great advantage in automatic control stations.

Abstract: Control system enabling the monitoring of a set of elements, more particularly a multi-recorder ensuring the monitoring of the junctors in a telecommunications exchange, comprising a live memory containing the data reflecting the situation of the elements, annex circuits enabling the distributing and processing of the said data and logic operators preferably formed with diode matrixes receiving simultaneously outside data coming from the monitored elements and internal data coming from the memory and ensuring the internal monitoring of the system and the monitoring of the said elements.

Abstract: The invention concerns regenerative repeaters for pulses. The method consists of detecting errors, coding them and recording them in a channel of a tele-locating frame. Each regenerative repeater of a connection has a channel which is attributed to it, for example channel i, for the repeater whose order is i. The device implementing the method comprises means for directing the tele-locating signals at the input of the repeater, memorizing them and applying them to a low-frequency modulator which reinjects them into a directing means at the output of the repeater; it comprises also means for detecting the channel whose order is i and recording therein the coded proportion of error of the repeater.

Abstract: The invention comes within the field of four-wire telephony. To avoid the closing of a loop between the two unidirectional channels, a half-echo suppressor is provided for each terminal, which comprises mainly a speech detector for the emitting channel, said speech detector having two operational modes: the first sends out a speech indicator signal based on the characteristics of amplitude and sign change on the emitting channel whereas the second compares the amplitude on the emitting channel and the amplitude on the receiving channel and is effective when the receiving channel is active. The invention applies more particularly to a PCM network in combination with a concentrator which uses the inactivity periods of the circuits.

Abstract: Switch comprising a matrix of relays, each providing a connection point between a horizontal input and a vertical input, and auxiliary control relays, at least one per vertical input, fulfilling the horizontal and vertical input control functions and the holding of the vertical input control and the releasing of the horizontal input control.

Abstract: Current stabilizing device constituted by a two-terminal network in series with a load to be fed. The two-terminal network comprises, in series between its two poles a regulating transistor and a resistor, the regulating transistor being controlled by the current collector of another transistor whose base current is controlled by the difference between a stabilized voltage taken at the terminals of a voltage stabilizing diode through which a current which is itself stabilized flows and the voltage drop across the resistor; several two-terminal networks may be connected together in series. The device is particularly applicable to the stabilization of the remote feeding current for repeaters in telephone cables which are not accessible, for example, submarine telephone cables.

Abstract: Very compact thermoelectric microgenerator providing a high output voltage (10 V) and having high efficiency, comprising a great number of thermocouples arranged in rows connected together so as to form a continuous conductor of deposited thin layers on a thin insulating support. The cold and hot sources are fitting provided with low walls parallel to one another and orthogonal to the rows of thermocouples. The even junctions of the thermocouples are placed in the vicinity of the low walls of the cold source and the odd junctions are placed in the vicinity of the low walls of the hot source. Application is to implanted medical appliances.

Abstract: Multiplexer for telephone transmission coupling the calling channels containing supervisory information which are not premodulated to the premodulated conversation channels which contain the voice information, modulating the coupled channels to bring the conversation signals into the multiplex group and using a single extra modulation of the whole spectrum obtained after modulation of the coupled channels to re-position correctly the calling signals in the multiplex group.

Abstract: The invention comes within the field of facsimile devices and concerns the winding and unwinding of a document on a rotating drum. According to the invention, the fixing of only one edge of the document on the drum is provided for and the unloading of the document is made easier by a drawer which applies resilient pressure tangentially against the cylindrical surface of the drum. The document is removed in a reverse direction in relation to the operation of the facsimile device.

Abstract: Deflection system for a cathode ray tube used in synthetic generators of curves comprising a vertical deflection device and a horizontal deflection device. Each of the devices comprises a main loop with a main deflection coil producing a deflection having a high amplitude with a slow variation and a secondary loop with a secondary coil producing a deflection having a low amplitude with a rapid variation; the main loop is fed by a deflection signal and produces an error signal feeding the secondary loop. Compensation for the delay and for the faults inserted by the main loop and use of only one deflection signal for each device is provided.

Abstract: A method enabling the improving of the connections of printed circuits or the like by preventing the accumulation of droplets of metal alloy at selected connection points of conductive strips disposed on at least one surface of insulating insualting planar support member of the printed circuit. The method includes forming sharp appendages of the strips at selected connection points of the strips which appendages point in substantially the same direction and are located proximate to the selected connection points. Upon applying a film of metal alloy over the conductive strips, the sharp appendages serve for driving the excess metal alloy away from the selected connection points under the action of surface-tension during the formation of the film of metal alloy on the strip.

Abstract: A device for displaying distinct pictures on n receiver screens of the television type comprising n+1 picture maintaining memories which can be connected to the n receivers through n switches and a monitoring element ensuring the charging of the memory which has not been read during the reading of the n memories.

Abstract: Device for synchronizing a receiver of digital data which serves to identify the beginning of the coding word, for example a level received, hence attributing to each pulse a correct weight in a manner such as to confer on each sample received an amplitude corresponding exactly to the amplitude of the sample taken at the emission, or more generally, for attributing to each pulse a content of data corresponding to the coding at the emission, for example the primary color in a trichromatic color transmission.