Abstract: A temperature-measuring device for a heating/air-conditioning installation, having sensors biased by at least one electrical power-supply source including at least one series branch exhibiting a first and a second terminal coupled to terminals of a power-supply source, the first branch featuring a first (D1) and a second (D2) diode head to tail, connected between the first (2) and the second (3) terminal of the series branch, and also a first (CT1) and a second (CT2) detector connected in series between the first (2) and the second (3) terminal of the series branch, the common point between the first (D1) and the second (D2) diode being connected to the common point between the first (CT1) and the second (CT2) detector, and where a changeover-switching device is included for reversing the direction of the bias so that the first (CT1) or the second (CT2) sensor is traversed by a current.

Abstract: A device for regulating the current passing through an inductive element, including a series branch including said inductive element and a control device (PT) monitored by a control signal (Vc) to supply the inductive element from an electric supply source and a device supplying a measurement signal (Vm) of an average current through the inductive element and including a device for acquiring (D Rs) a signal representing a current through the inductive element and a circuit averaging (T2, Rm, Cm) the signal representing a current, and a regulating device for generating the control signal based on a setpoint value and a measurement signal. The acquisition device is arranged parallel to the inductive element.

Abstract: A device for regulating the current passing through an inductive element, comprising a series branch including said inductive element and a control device (PT) monitored by a control signal (Vc) to supply the inductive element from an electric supply source and a device supplying a measurement signal (Vm) of an average current through the inductive element and comprising a device for acquiring (D Rs) a signal representing a current through the inductive element and a circuit averaging (T2, Rm, Cm) said signal representing a current, and a regulating device for generating the control signal based on a setpoint value and a measurement signal. The acquisition device is arranged parallel to the inductive element.

Abstract: The invention relates to a method of thermal compensation of a thermopile arranged in a sensor housing, characterised in that it implements:

Abstract: The invention relates to a temperature-measuring device intended especially for a heating/air-conditioning installation, and comprising sensors biased by at least one electrical power-supply source.

Abstract: A device, particularly for the instrument panel of a motor vehicle, comprises a liquid crystal display module comprising a multiplicity of parallel inputs connected via a multiplicity of control lines to a multiplicity of outputs of a control module supplied by an electrical power supply. The output of the display module and the electrical power supply are connected to an electrical ground. A branch line has, on the one hand, an input connected to the electrical power supply and an output connected directly to the output of the display module, and has, on the other hand, an impedance considerably lower than the corresponding impedance of each pair formed by a control line and the output of the associated control module. The device is thus protected against electrostatic discharges.

Abstract: A traveling array antenna which operates at microwave/millimeter frequencies is disclosed in which a like number of radiator elements are arranged in two mirror image branches, an RF signal feed is fed through a 180 degree compensating power splitter to each branch of the antenna array, each of the radiator elements includes an impedance matching transformer connected at its input side and in which a radiator terminating patch is connected to the end of each of the two mirror image branches.

Abstract: A method and apparatus for marking a surface with a predetermined pattern is described. The apparatus includes a surface marking mechanism that supports a material dispenser. The material dispenser is manipulated along a number of axes including an x-axis, a y-axis, and a z-axis. In addition, the material dispenser is manipulated to rotate around a w-axis and to form a tilt angle with the w-axis. The surface marking mechanism includes movement devices for initial positioning of the mechanism and for re-positioning the mechanism to complete a selected pattern that does not fit within the border of the mechanism. The surface marking mechanism is responsive to control signals from a controller. The control signals are derived from a mathematical model characterizing the spatial relationship between the predetermined pattern, the material dispenser, and the surface to be marked.

Abstract: A method and apparatus for marking a surface with a predetermined pattern is described. The apparatus includes a surface marking mechanism that supports a material dispenser. The material dispenser is manipulated along a number of axes including an x-axis, a y-axis, and a z-axis. In addition, the material dispenser is manipulated to rotate around a w-axis and to form a tilt angle with the w-axis. The surface marking mechanism includes movement devices for initial positioning of the mechanism and for re-positioning the mechanism to complete a selected pattern that does not fit within the border of the mechanism. The surface marking mechanism is responsive to control signals from a controller. The control signals are derived from a mathematical model characterizing the spatial relationship between the predetermined pattern, the material dispenser, and the surface to be marked.

Abstract: A method and apparatus for marking a surface with a predetermined pattern is described. The apparatus includes a surface marking mechanism that supports a material dispenser. The material dispenser is manipulated along a number of axes including an x-axis, a y-axis, and a z-axis. In addition, the material dispenser is manipulated to rotate around a w-axis and to form a tilt angle with the w-axis. The surface marking mechanism includes movement devices for initial positioning of the mechanism and for re-positioning the mechanism to complete a selected pattern that does not fit within the border of the mechanism. The surface marking mechanism is responsive to control signals from a controller. The control signals are derived from a mathematical model characterizing the spatial relationship between the predetermined pattern, the material dispenser, and the surface to be marked.

Abstract: A method is provided for displaying the speed and the distance on board a motor vehicle. The shaft of an auxiliary motor drives a speed indicator and a mileage recorder and its rotation controls a train of pulses. The speed of rotation of the auxiliary motor is controlled so that the period of the train of pulses and the total number of pulses are slaved respectively to the period of another train of pulses and to their total number, this other train of pulses being controlled by the rotation of one of the wheels of the vehicle.

Abstract: A microprocessor transfers into a first so-called "fixed" zone of the memory the intermediate total distance travelled since the vehicle was put on the road and, in a second so called "journey" zone of the memory the successive partial distances travelled between each power supply cut off, the successive partial distances being transferred into the cells of the journey zone of the memory each time the power is switched off.

Abstract: A frequency-scan traveling wave antenna receives radio frequency (RF) energy at an input port, passes the energy through a quarter wave transformer to a first radiator element in an array of radiator elements, each pair of radiator elements being connected by a respective delay line. Each radiator element includes an input port of known characteristic impedance connected to an impedance matching section which compensates for that element's radiated power. Each radiator element has an output port with a section of transmission line disposed between a main radiator section of said radiator element and said output port, and impedance matched to the output port. In one embodiment, each delay line includes a plurality of delay line sections, with adjacent delay line sections being mutually perpendicular. In a second embodiment, each delay line includes a plurality of delay line sections disposed in meandering form.