Actaris S.a.s.

Schlumberger Technology Corporation

Laurent Demia

Serge Bulteau

Alain Cros

Frédéric Droin

Michel Petite

Jerome Manigand

Christian Turplin

Jean-Pierre Trioullier

Jacques Dugray

An optical detector device for a counter, comprising a consumption indicator, formed from a rotating disc () with a section called active (A) and optical elements of the receiver and emitter types opposite the disc. The received signal from which is used to infer the number of rotations of the disc and which comprises at least two of the optical elements (A,B) of one type and at least one of the optical elements () of the other type. The section (A) is a reflecting section with a center angle of 45 to 225 DEG and the two optical elements of one type (A,B) are emitting elements, emitting a beam of light, where the lines connecting each trace (S(A), S(B)) of the beams on the disc () to the center of the disc form an angle at the center which is not zero.

Optical detector device for a counter

A volumetric fluid meter has a cylindrical measuring chamber with a lateral wall, a bottom () and a lid (), a lower cylinder () and an upper cylinder (), having the same diameter, which is less than the diameter of the chamber. An inlet orifice and an outlet orifice () respectively admit fluid to and evacuate fluid from the chamber. A cylindrical piston () is disposed eccentrically and guided kinematically in the chamber and effects an oscillatory movement in the chamber as a result of the displacement of a volume of fluid. A fixed partition () between the inlet orifice and the outlet orifice, lies radially between the lateral wall and the lower and upper cylinders, and lies axially between the bottom and the lid. The meter further includes a vertical groove () extending at least partly along the lower and upper cylinders and is in communication with one of the inlet and outlet orifices, and is situated in the vicinity of said fixed partition.

Volumetric fluid meter

A reciprocating-piston type meter for measuring liquid volume comprises a meter bodyhaving a measuring chamber disposed therein. In a spaceexisting between the meter bodyand the measuring chamber, the meter has meansfor creating a swirling stream of liquid and meansfor confining particles present in the liquid.

Volumetric liquid meter

Method of measuring forces in the presence of an external pressure

A meter, in particular a fluid meter, having a meter body provided with a flow rate measuring device, a counter mounted on the meter body and provided in a top portion with a display for displaying the quantity of fluid that has been consumed, and in a bottom portion with a converter device for converting the fluid flow rate into the quantity of fluid that has been consumed, and fraud indicator assembly associated with the top portion. A portion of the fraud indicator assembly being designed to be partially or totally detached from the top portion so as to totally block the operation of the converter device after an attempt at fraud has been made on the meter, even if the mechanical action involved in the fraud is no longer applied.

Apparatus for detecting fraud on a fluid meter

A volumetric liquid meter of the oscillating piston type having a chamber, includes a bottom portion, a fixed partition, a piston and a filter. At least one element forming the chamber is formed by at least two materials presenting different mechanical characteristics and is made by a multi-material injection method.

Volumetric liquid meter having a part of the chamber formed with multi-materials

In order to measure forces F exerted on a part in a given direction and in the presence of an external pressure p, the part has integrated therein a sensor ( ) which delivers an output signal of the form S&equals;&agr;.F&plus;&bgr;.p&plus;&ggr;, and said sensor is dimensioned in such a manner as to cause the coefficient &bgr; to be zero. To this end, a sensor ( ) is used that includes a tube ( ) formed by a thinner walled portion ( ) and a thicker walled portion ( ), together with strain gauges ( ) mounted in the tube ( ) and interconnected to form a Wheatstone bridge.

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Macon, France

Laurent Demia