Abstract: A Fluid turbine flow meter, including a measurement chamber, a turbine body that is displaced axially, as a function of the fluid flow rates, between a high position and a low position in the measurement chamber and having a rotation axis, a centering bearing for the rotation axis in the measurement chamber that has a longitudinal body with a longitudinal passage supporting and passed through by the rotation axis, the rotation axis pivoting by being held axially in the measurement chamber, by a first axial end stop in the high position and by a second axial end stop in the low position, the centering bearing having, in the longitudinal passage, at least two cylindrical longitudinal support centering walls for the rotation axis.

Abstract: The invention concerns a fluid turbine flow meter including a rotatable longitudinal body of a turbine equipped with longitudinal blades and regularly distributed support arms of the blades connecting the blades to the rotatable body of the turbine, where each blade has on the support arm a plurality of separate longitudinal thrust members the cross sections of which are adapted to receive the thrust of the fluid jet when the blade is active and to allow circulation of fluid between the thrust members when the blade is inactive.

Abstract: The invention concerns a fluid turbine flow meter including a rotatable longitudinal body of a turbine equipped with longitudinal blades and regularly distributed support arms of the blades connecting the blades to the rotatable body of the turbine, where each blade has on the support arm a plurality of separate longitudinal thrust members the cross sections of which are adapted to receive the thrust of the fluid jet when the blade is active and to allow circulation of fluid between the thrust members when the blade is inactive.

Abstract: A Fluid turbine flow meter, including a measurement chamber, a turbine body that is displaced axially, as a function of the fluid flow rates, between a high position and a low position in the measurement chamber and having a rotation axis, a centering bearing for the rotation axis in the measurement chamber that has a longitudinal body with a longitudinal passage supporting and passed through by the rotation axis, the rotation axis pivoting by being held axially in the measurement chamber, by a first axial end stop in the high position and by a second axial end stop in the low position, the centering bearing having, in the longitudinal passage, at least two cylindrical longitudinal support centering walls for the rotation axis.

Abstract: Inductive angular-position sensor, including a partially metallized disk that moves in rotation around its axis of revolution; and a stator that includes a primary coil and several secondary coils, whereby the secondary coils are arranged essentially symmetrically in pairs relative to the axis of revolution, so as to form one or more pairs of secondary coils, whereby the secondary coils of each pair are connected, on the one hand, to one another, in series and in phase opposition relative to one another, and, on the other hand, to the terminals of a measuring element that can generate an output signal that depends on the voltage at the terminals of the pair.

Abstract: Inductive angular-position sensor, including a partially metallized disk that moves in rotation around its axis of revolution; and a stator that includes a primary coil and several secondary coils, whereby the secondary coils are arranged essentially symmetrically in pairs relative to the axis of revolution, so as to form one or more pairs of secondary coils, whereby the secondary coils of each pair are connected, on the one hand, to one another, in series and in phase opposition relative to one another, and, on the other hand, to the terminals of a measuring element that can generate an output signal that depends on the voltage at the terminals of the pair.

Abstract: A liquid meter with a single jet of the type including a motor member transmitting its movement to a totalizer via a transmission mechanism constituted by an axle whose one end is secured in rotation to the motor member (1) and whose other end is engaged in a chamber, provided in a housing (2) enclosing a gear train and a drive axle of the totalizer, through an opening provided in the partition (6) of the housing (2), the end including a pinion coacting with a pinion mounted on the drive axle of the totalizer, and protective elements (10) for the axle (4). The protective elements are arranged to prevent the passage of solid particles contained in the liquid through the opening (5) toward the chamber (3) by defining a protected zone of least turbulence surrounding the axle (4) adjacent the opening (5) and promoting the fall by gravity of the particles which lose their initial kinetic energy during their movement toward the opening (5).

Abstract: A liquid meter includes a housing with two compartments with respectively a motor member disposed in the path of movement of a stream of the liquid to be measured and a counter, the transmission of the movement of the motor member to the counter being carried out through the separation wall of the compartments with the aid of a magnetic drive device having a pair of magnets, the first magnet associated with the motor member having a face with double polarity in magnetic equilibrium with a face of double polarity of the magnet associated with the counter, each magnet has at least one double polarity on each of its other faces.

Abstract: A method for detecting water meter malfunction and calculating the duration thereof, includes measuring the average flow rate for each volume unit detected after the preceding volume unit, comparing this average flow rate with two limit flow rates which are a first flow rate corresponding to the minimal flow rate when the meter is operating normally and a second flow rate corresponding to the minimal flow rate when the meter is operating defectively, calculating, when an average flow rate is found to be higher than the first flow rate, the relation between the sum of recorded volume units between the two flow rates and the sum to which is added the sum of volume units recorded at flow rates higher than the second flow rate, starting a clock when this relation is lower than a defectiveness threshold and stopping it when the relation is once more higher than the said threshold.

Abstract: A radio communication system supplied by a battery, comprising at least one emitter and a receiver. The receiver operates in an intermittent manner between an active mode and a stand-by mode. The receiver has a frequency of intermittent operation such that the time in the active mode is the shortest possible time. The emitter emits at least one short field to the receiver, this field comprising minimum information for the initialization of a communication such that the time for stabilization of the receiver is compatible with the time in the active mode.

Abstract: A measuring device for a liquid meter with oscillating piston comprises a hollow chamber pierced with two apertures and limited by a cylindrical side wall, a bottom and a lid; a piston enclosed in said chamber and held movably, along a partition wall about a well. This device further comprises at least one groove, made in the corners formed between the bottom and the side wall of the chamber or the well or the piston, that opens into the hollow of the chamber, in a space formed between the well and the side walls, and is designed to receive deposits of particles introduced into said device by the liquid to be metered. The device can be applied in particular to water metering. FIG.

Abstract: A cylindrical chamber (1) for an oscillating piston type of liquid counter comprises notably a biconcave fixed partition wall (9) and grooves on the lower and/or upper edges of the piston and, as the case may be, on the small cylinders of the chamber 1. The disclosure can be applied to the metering of liquid and, especially, to the metering of water.

Abstract: The invention pertains to a rotation gauge for a water meter register where the hydraulic part of the meter rotates a shaft whose revolutions are to be counted. At the other end of the shaft at least one magnet is driven by rotation by the shaft. Outside this hydraulic part, two flexible blade switches are mounted opposite the path of said magnet and connected to an electronic circuit which provides a register with metering pulses. The metering pulses are characterized by the fact that each of triggered by the closing of the first flexible blade switch and stopped by the closing of the second switch. The second switch is closed substantially in the middle of the period during which the first remains closed.

Abstract: A device of the antifraud sealing cap type in the form of a unit having: a covering skirt (5) provided on the inside face of its upper edge with recesses extended downward by hooks (9) able to engage in shoulder (3) of threaded lock nut (2) provided on the body of the meter; a ring with an inside vertical lip (10) whose pin (11) projecting from the collar come to be inserted in said recesses (8); and a cover (12) whose opening and closing hinge (13) is pivoted in an opening made on the upper edge of the skirt. The device is particularly useful for antifraud covering of water meters.

Abstract: A turbine for a multijet fluid flow meter having a planar disk mounted for rotation in the meter housing includes a plurality of vertical blades supported normal to, and by, the disk. A ribbed shaft carried by the disk drives a counter. The disk may include braking ribs on the upper or lower surface for slowing rotation of the disk when subjected to strong fluid flows. Various blade configurations are contemplated, and the turbine may additionally take the form of a duality of parallel disks interconnected by a plurality of blades normal to both disks.