Abstract: A memory display system is provided including:a recording support medium having a layer of a luminescent material capable of storing energy coming from a light beam, electrodes enclosing the luminescent material and applying thereto an electric field for releasing the previously stored energy in the form of a beam;an optical transmission device placed in the path of said beam;a sensor receiving this beam and converting the intensity of the light beam into an electric signal;a processing circuit receiving said electric signal, processing it and controlling display thereof on a display device.

Abstract: An embodiment of the electrostatic image sensor comprises essentially two electrodes, one layer of photoconductive material and one dielectric layer comprising an electret designed to polarize the photoconductive layer without requiring a voltage source during the recording of an image. During a recording stage, a change-over switch short-circuits the electrodes. Photocarriers are released by the X-rays that have crossed an object to be radiographed. The said photocarriers move in the electrical field created by the electret and tend to cancel the electrical field at the interface between the two layers. During a reading stage, the change-over switch connects the electrodes to the inputs of a current amplifer while a light beam scans the layer of photoconductive material. The photocarriers move and completely cancel the electrical field at every point of the interface between the two layers. The current detected by the amplifier makes it possible to display an image on a cathode ray tube.

Abstract: An improved line-transfer photosensitive device and particularly a device which operates with a double drive charge comprises on at least one semiconductor substrate a photosensitive region made up of M lines of N photosensitive points. The photosensitive points of the different lines are connected in parallel by means of conductive columns to a line memory which carries out at least the transfer of the signal charges integrated on any one line of the phtosensitive region to a read register consisting of a charge-coupled shift register of the volume transfer type. The line memory is formed on a semiconductor substrate region having an impurity implantation of opposite type with respect to the substrate in order to produce a volume charge transfer. The region in which the line memory is formed has a dopant concentration which is lower than or equal to that of the region in which the shift register is formed.

Abstract: A device is used to handle small-sized semiconductor chips, such as ultra-high frequency chips delivered loose. In order to lift up these chips one by one at a precise point by means of a pipette, the device uses the charges of static electricity which make the chips adhere to an endless tape made of plastic. In a first, vertical part, the tape is loaded with chips in passing through a feeder bin. A stop retains all the chips on one side of the tape, and another stop lets through only those chips that are flat on the other side of the tape. In a second, horizontal part the tape passes through a tunnel in which the chips are oriented and then stored and taken up by a suction pipette. The invention can be applied to the assembly of semi-conductor chips in packages or on substrates.

Abstract: A three-axis fiber-optic interferometer as applicable in particular to a gyrometer comprises three optical fibers forming rings disposed along three different axes. The three optical fibers are fed by a light beam emitted by a single source. A single interference photodetector receives the light beam after transit through the different fibers. Coupling devices couple the second fiber to the first fiber and the third fiber to the second fiber.

Abstract: A self-contained linear bearing unit presenting a single line of bearing support therewith is comprised of a retainer having ball-loaded paths and ball-unloaded paths with turnaround paths being located in end sections of the retainer. Caps received on the end sections capture the ball bearings and a bearing plate is disposed over the balls in the ball-loaded path. The unit can be made in a linked together chain of such units and various bearing configurations can be formed from plural ones of such units arranged in a desired disposition.

Abstract: A robotic element for lifting and moving semi-conductor wafer carriers and detecting collisions and correctness of engagement of the carrier to a robotic transport device. The element has a pair of spaced, parallel plates, a pair of rotary solenoids each fixed to one plate, and mounted between said plates and extending through the holes in said first plate for rotation therein. An engagement member is fixed to each of said rotary solenoids and extends outwardly from said first plate. The element also has a plurality of collision sensors and collision rebound means mounted between said plates.

Abstract: A leadframe carrier and insert compatible with a temperature-affectable, expandable and contractable leadframe strip to be bonded with a selected plurality of semiconductor chips, said carrier being automatically separable and removable with regard to said insert during manufacture despite possible clinging which may be induced by the expansion and contraction of said carrier insert.

Abstract: A stable binary counter as applicable to synchronous counters, to frequency dividers and more particularly to microwave integrated circuits is constituted by a plurality of elementary counters mounted in cascade. Each elementary counter is formed by a half-adder having two inputs, one "sum" output and one "carry" output. The "sum" output is connected to the input of a master-slave flip-flop, the output of which is connected in a feedback loop to one input of the half-adder. The master and slave flip-flops are controlled by the two complementary waveforms of a single clock signal. The "carry" output of one half-adder is connected to the input of the following half-adder.

Abstract: An apparatus used to manufacture a molded glass stem comprises a plurality of conventional lower stem mold assemblies and a plurality pre-heating, heating, forming, and annealing stations. The forming stations include at least one primary forming station having a primary upper stem mold assembly and at least one secondary forming station having a secondary upper stem mold assembly. The primary upper stem mold assembly includes a primary universal stem mold having primary fillet-forming means formed in a first mold block thereof. The secondary upper stem mold assembly includes a secondary universal stem mold having secondary fillet-forming means formed in a second mold block thereof. The primary fillet-forming means includes a plurality of longitudinal fillet-forming openings formed through the first mold block of the novel primary universal stem mold. A plurality of novel primary inserts are replaceably disposed within the openings in the first mold block.

Abstract: An active load in an integrated logic circuit of the Direct Coupled FET Logic (DCFL type) in which the active load has a negative threshold voltage and the transistors have a positive threshold voltage. The active load is a transistor, the gate metallization of which is combined with the source metallization. If the active load delivers an excessive current, this current can be adjusted by adding at least one second gate which has a positive threshold voltage and which is in electrical contact with the first gate with a negative threshold voltage. The appropriate threshold voltages are obtained by bombarding the corresponding gate regions. The transistors of the integrated circuit are obtained during the manufacture of the second gate.

Abstract: Circuitry for limiting a rectified operating voltage.To recover energy from unutilized power from the secondary winding of a switching-network transformer, it is recirculated to the primary winding through a diode. When appliances fail, the excess energy component can increase to the extent that components are destroyed because the operating voltage increases.To prevent this situation the excess energy is recirculated into a higher operating voltage U.sub.S through a diode and through another secondary winding of the transformer. The number of turns in the second secondary winding and its polarity ensure that the flyback voltage U.sub.R will be higher than the difference between U.sub.S and U.sub.B.Switching-network components in conjunction with rectifier modulators in television receivers.

Abstract: For carrying out an interrogation a position modulated laser light wave is used. A key word is displayed in an interrogator and coded in accordance with a cyclic code, for example Golay's code. This coded key word is used for modulating the laser wave. In the responder the same key word is displayed and coded in the same way. After reception and demodulation each message is compared in a correlation circuit with the local reference word. The correlation method used allows parasite pulses to be taken into account and the word received to be validated with a given security threshold.

Abstract: A microwave frequency discriminator, i.e. an electronic device for directly transforming frequency modulation on a microwave carrier into a demodulated lower frequency signal. The discriminator is similar to a Travis discriminator and includes an inlet microstrip line, two resonant circuits (R.sub.1, R.sub.2) constituted by dielectric resonators and coupled to said inlet microstrip line to receive the modulated microwave signal, two outlet microstrip lines coupling each resonator to a respective microwave detector circuit, said detector circuits including loads (r.sub.1, r.sub.2) in series-opposition in the manner of a Travis discriminator. The microwave frequency discriminator can be used in a demodulator and/or receiver for frequency modulated microwaves.

Abstract: In a high-voltage transformer of particularly small size comprising a magnetic circuit and a coil shell on which is wound a secondary winding consisting of one or a number of separate secondary coils, each secondary coil is contained within a channel closed by an insulating ring made up of two segments. The two ring segments are assembled around the channel in a movement performed in the same plane as that of the channel.

Abstract: The luminance and chrominance signals of a PAL or SECAM composite video signal are separated by means of a method comprising the following steps:sampling and digitizing the composite video signal;determination of a luminance signal and a chrominance signal by means of a first processing channel, from the digital sample of the current point of the image, from a previous sample corresponding to the current point located on the line in the previous field which is spatially positioned in the image immediately beneath the current line, from the luminance signal values already determined in a spatiotemporal neighborhood of the current point and in accordance with an analysis of the local spatiotemporal context of the current point;determination of a luminance signal and a chrominance signal by means of a second processing channel by applying the digital composite signal to the input respectively of a luminance filter and a chrominance filter;selection of the luminance and chrominance signals which are present at th

Abstract: A method for the transmission of a video signal, in which the analogue signal is converted into a digital signal and is digitally transmitted. However, before the transmission is transformed into the spectral domain, some portions of the digital signals are variously weighted on the basis of the physiological behavior of the eye. This weighting is performed by coding the signals to be transmitted in their representational accuracy.

Abstract: To obtain a constant quiescent current, high dynamics and high stability of a class AB output stage of low-frequency amplifiers, comprising an input transistor; a driving circuit comprising a current source, a first pair of driving transistors connected in series between the current source and the input transistor, a second pair of driving transistors mutually connected in series and driven by the first pair of driving transistors; as well as a pair of output transistors driven by the second pair of driving transistors, the driving circuit comprises a first resistor connected between the current source and the base of one of the first pair of driving transistors, a second resistor connected between the bases of the transistors of the first pair and a resistive network inserted in series between the transistors of the second driving pair.

Abstract: An apparatus for manufacturing a glass stem for an electron tube has a plurality of lead-in conductors and a plurality of fillets with the lead-in conductors extending through the fillets. The apparatus comprises a first stem mold assembly and a second stem mold assembly for forming the stem therebetween. The first stem mold assembly comprises a universal stem mold having a plurality of longitudinal fillet-forming openings formed through a mold block. A plurality of inserts are replaceably disposed and retained within the openings in the mold block. Each of the inserts has a first end, an oppositely disposed second end, and a shank portion therebetween. Each of the inserts has a recess provided in the first end and a lead-accommodating opening extending from the recess into the shank portion of the insert. The mold block also accommodates one or more solid inserts in the openings to produce stems having dummy fillets, i.e., fillets without lead-in conductors therethrough.

Abstract: The invention concerns processes for immunizing nautical vessels against the disturbances that they cause to the magnetic field of the earth, consisting in supplying immunization loops of such a vessel with a set of alternating currents producing inside the volume of the vessel a homogeneous and alternating inductor field, isolating the alternating signal issuing from the alternating field at the measuring base and calculating the induced magnetization, wherein it allows to separate the induced magnetization from the permanent magnetization in the magnetic signature of a vessel while reducing the duration of measuring time required.