Abstract: A color matrix display unit which has a screen having at least three sets pixels, all pixels in a same one of the three sets being of the same color among red, blue and green and all said pixels of a same one of said sets being distributed in a matrix arrangement comprising rows and columns. A plurality of column conductors each simultaneously addresses all pixels in a same column. A plurality of row conductors each simultaneously addresses all pixels in a same line. Each column conductor allocated to red or blue pixels addresses an overall pixel area that is about double the overall pixel area addressed by one of the column conductors allocated to a green pixel. A drive circuit connected to the column conductors addresses the green pixels with a time or space repetition period which is half the period for red and green pixels.

Abstract: An electro-photographic printing device has a development location where toner is transferred onto a drum in proportion to the amount of light charges on the drum and a transfer location where toner is transferred from the drum to a sheet of paper. A heater unit for fixing the toner by heating it to a predetermined temperature has a heater and a blower for heat removal. Responsive to a call for printing, data to be printed are stored in a memory. The heater is energized until a set temperature is obtained. Printing is initiated as soon as the set temperature is obtained. The blower is stopped after heating has been discontinued, after printing has been completed, until there is a new call.

Abstract: The device comprises a thin layer (10) of liquid crystals disposed between a plane backing electrode and control electrodes each co-operating with the backing electrode to define a capacitor and a picture element such that each pixel corresponds to a row and to a column, each control electrode being connected to a control element such as a thin-film transistor enabling it either to be raised to the potential of a conductor which is common to all of the pixels in the column to which it belongs, or else to isolate it therefrom and cause it to take up a floating potential. The backing electrode is made up of two fractions (20.sub.1, 20.sub.2) provided with means enabling, them to be taken to different potentials that are inverted on each frame or multiple of the frame frequency, and in which successive columns (or successive groups of a few columns each) of control-electrodes co-operate with different ones of the fractions.

Abstract: A circuit has two multiplier modules. Each multiplier module has at least one controllable potentiometer for adjusting the amplitude ratio between an output signal and an input signal of the module. The potentiometers have substantially identical characteristics and they are controlled in the same manner such that the amplitude ratios of the multiplier modules are substantially equal. One of the modules receives as its input signal the first signal to be multiplied and delivers an output signal that is proportional to the product of the two operands, while the other module receives as its input signal a reference voltage and as its output signal it delivers a feedback signal which is servo-controlled to a value that is approximately equal to the value of the second signal to be multiplied. The circuit is applicable to meters for electrical energy.

Abstract: A type of electronic circuit, called an Application Specific Integrated Circuit (ASIC), is used to customize the functions in a semiconductor chip as defined by a user. ASIC includes a microprocessor, functional inputs and outputs, connection circuits, electronic gates, inhibition gates and links to perform "application specific" operations. The user chooses the functions and the arrangement of the various connection circuits from a menu of predetermined functions. Once the ASIC has been defined by the user, it is ready for manufacturing.

Abstract: A variable reluctance absolute angular position sensor, having at least one stator detector (2). The dector includes: at least one stationary magnetic circuit (4, 4', 4") of ferromagnetic material provided with a length of annular housing (5, 5', 5"), and extending over an angular sector .alpha.; and at least one annular winding (6) housed in part in the annular housing; and at least one rotor unit (3) comprising at least one annular segment (7) of ferromagnetic material extending over an angular sector .beta. of no more than 360.degree.-.alpha., and situated facing the winding (6) and being rotated coaxially with the winding (6) while facing the winding in such a manner that magnetic flux passes radially between the stator detector (2) and the rotor unit (3).

Abstract: A device for separating a stack of sheets in an office machine such as a simile machine, comprising an extractor roller (18), a presser member (14) pressed resiliently in the direction of the roller, and a stop (5) limiting the maximum distance between the extractor roller and the presser member. The stop is mounted so as to slide inside a supporting part (1) in the direction of the presser member. A spring pushes the stop toward the presser member, and a locking collar (11, 12) limits its sliding distance. The presser member is mounted on the supporting part so as to provide an integral device, improving reliability and reducing assembly time.

Abstract: A point-of-transaction system for processing electronic payments of transions includes portable payment terminals, each having a keyboard for entering transaction data and an interface for communicating without wires with a distant central station and, in turn, to a processing center in telephone communication with the central station.

Abstract: The miniaturizable sensor comprises an insulating substrate (10) supporting first measurement electrode (24) and comprising a flexible measurement arm (18) of conductive or semiconductor material, one end of which is secured to the substrate (10) and the other end of which constitutes a second electrode facing the first electrode. The first end of the measurement arm is secured to the substrate via a beam (16) having a bending modulus at least ten times greater than that of the measurement arm (18) and substantially parallel to the measurement arm and via a foot (14) rigidly secured to the substrate (10) and situated between the two ends of the measurement arm, the connections of the beam (16) to the measurement arm (18) and to the foot (14) being of the fixed-end type.

Abstract: The invention relates to a magnetic drive device enabling a member placed one side of a non-magnetic wall to be driven by a rotary drive shaft placed on the other side of the wall. The driven member is mounted to rock about an oscillation axis orthogonal to the axis of rotation of the drive shaft and carries an axially-magnetized magnet whose outside surface has a right cross-section in the plane containing the oscillation axis and the axis of rotation of the drive shaft that is in the form of a circle centered on the oscillation axis. The drive shaft carries an axially-magnetized magnet offset from the axis of the drive shaft.

Abstract: The machine includes a frame (11) and a film (12) for one of two substrates (1, 2) to be pressed onto the other under a plate (4). It is then possible to polymerize by points a glue joint (3) so as to assemble the two substrates. Accurate displacement means (7, 8, 9, 10) and observation means (13, 14, 15) are also provided. Application for the embodiment of liquid crystal cells.

Abstract: The gyroscope is based on the Sagnac effect and comprises a coiled dielectric waveguide, a source of electromagnetic waves provided with a splitter for sending two contrarotating waves from the source round the ring and an interference detector receiving the contrarotating waves. An electro-optical modulator is controlled to impart periodic alternating and symmetrical phase modulation to the waves at a period that is substantially twice the travel time in the waveguide. The modulator is placed upstream from the waveguide for one wave and downstream for the other. A second modulator receives the output of a phase shift sawtooth generator of adjustable slope and is placed upstream from the waveguide for one wave and downstream for the other. An electronic measurement circuit controls the direction and the value of the slope of the sawtooth to cancel the phase difference of the waves received by the interference detector.

Abstract: A circuit for measuring variations in the capacitance of a variable capacr forming part of a sensor includes an oscillator which generates an alternating signal which is supplied to two branches of a detection bridge. The first branch includes the variable capacitor connected in series with a variable capacitance diode. The second branch includes a capacitor connected in series with a variable capacitance diode. A differential stage has each of its in puts connected to the common point of a respective one of the branches. Synchronous demodulation means connected to the oscillator, are connected to the output of the differential stage for delivering a DC unbalance voltage Ve which is injected by a feedback line to the common point of the first branch, thereby continuously balancing the detection bridge.

Abstract: A method of assembling a mechanical part on a support includes making a projecting thickening situated substantially over a connection face of an anchor block of the part; depositing a layer of one of the components of a eutectic on at least one fixing zone of the support; using a tool for holding the thickening to move the part so that its connection face co-operates with the fixing zone of the support; raising the temperature of the eutectic point of the eutectic; exerting localized force on the thickening; and simultaneously subjecting the part or the support to mechanical stresses. The invention is particularly applicable to assembling a capacitive sensor. The invention is also directed to a mechanical part for carrying out the assembly method, as well as a tool for grasping the mechanical part.

Abstract: A circuit for controlling the lines of a display screen and including a t means with a single output is disclosed. The test means includes a single test control line (LCT), a single test output line (LST) and a plurality of sample holders (CEBj) and associated gates (Pj) and switches (Ij). The output voltage of the sample holders is transmitted onto a test output block (ST).

Abstract: Magnetic characters arranged in a row on a check are read in an apparatus effecting relative linear displacement between the check and a magnetic reader. The displacement is effected either by manually removing the check from the apparatus, or by manually moving the reader.

Abstract: A method is disclosed for a forming integrated circuit on a semiconductor chip, said semiconductor chip having the first surface having a central region and a peripheral region including forming more than one contact region on each line connecting two active regions of the semiconductor chip.

Abstract: A chip card receiver is divulged comprising an opening 59, a first connector 54 for thick cards 57 guided by first fixed guide means 65, 63. It has a second connector 52 for thin cards 53, slanted with respect to the direction in which the thick cards 57 are introduced and guided. The thin cards 53 are deflected and guided by a spring 61 in the direction of connector 52. The thick cards 53 cannot pivot in opening 59 and when they are introduced therein they cause spring 61 to retract.

Abstract: A card reader receives electronic chip cards of different thicknesses incing relatively thick and thin chip cards, each card having electrical interface connection terminals thereon. The reader includes a front panel having a card introduction opening. A first mating connector is positioned to engage the interface connection terminals of the thick chip cards. A fixed first guide positions the interface connection terminals of the thick cards into engagement the first mating connector. A second mating connector is positioned to engage the interface connection terminals of the thin chip cards. A moveable second guide means guides the interface connection terminals of the thin chip cards into engagement with the second mating connector. The second guide is retractable under action of introduction of the thick cards against a resilient return means.

Abstract: A dial needle is mounted on a drive shaft of a measuring instrument. The dle includes a body and a support, both mounted on the drive shaft. The body and the support are initially connected in a one-piece construction in which the body is spaced axially from the support. Upon axially moving the body along the shaft to the support, weakened zones break, thereby detaching the body from the support. A pointer on the body is angularly turnable to an indexed position by a peripheral projection and a complementary recess provided on the support and the body.