Abstract: A link of controllable resistance comprising an FET (Q16) connected in series with a low-value resistor (R15) is connected in parallel with a time constant determining resistance (R11) in an RC type low-pass filter. A discriminator circuit (40, 50, 60) provides an on/off type signal following variations in the DC component of an input signal present on a terminal (A). A retriggerable monostable (80) defines a "neutral" time interval of predetermined duration running from the beginning of said on/off signal. At the end of said neutral period, a circuit (20) switches the FET on, thereby reducing the time constant of the RC network in the RC low-pass filter. This time constant is subsequently progressively rasied to a high value by progressively switching the FET off. The filter is specially applicable to weighing a body that is subjected to movement or to oscillation, or to performing weighing measurements in a vibrating environment.

Abstract: A dynamometer is provided with a testing member having a bending beam. The bending beam has an end embedded in a support and is elastically deformable in bending under the influence of a force Q applied to its opposite end. The dynamometer further comprises a sensor for detecting the deformation of the beam. Anchorage zones are defined in the material of the beam, for receiving four rows of windings of prestressed gauge wire having their principal strands directed approximately perpendicularly to the force Q. The principal strands remain in close contact with the beam in the bending zone. Two of the rows of windings have their principal strands arranged along the tensioned fibres of the beam and the other two have their main strands arranged along the compressed fibres of the beam. The four rows of windings form an electrical bridge assembly.

Abstract: A dynamometer comprising a testing body which is deformable under the effect of a force which is applied, in the material of which are defined bearing zones capable of receiving four series of windings of prestressed gauge wire remaining in close contact with the testing body, of which two have principal segments oriented parallel to the force applied, while the two others have principal segments oriented perpendicularly to the force applied, these four series of windings forming an electrical bridge arrangement, the segments oriented parallel to the force applied being located in opposite arms of the bridge arrangement, as are the segments oriented perpendicularly to the force applied. The invention is useful for the production of industrial dynamometers.

Abstract: This invention relates to load receivers in which a solid member with a constriction supplies the opposing elastic force. The connection between this solid member and the remainder of the load receiver is produced exclusively by pairs of bolts, tightly housed in bores of the solid member; each pair of bolts co-operates moreover with a part of the load receiver which has a lower rigidity than that of the material constituting the solid member. Such load receivers can be used in weighing apparatus.

Abstract: This invention relates to a capacity measuring device. A first capacity-frequency converter operates on the capacity to be measured and supplies a measurement frequency FM; a second capacity-frequency converter co-operates with a standard capacity and supplies a standard frequency FE. A calculation circuit determines (M.multidot.FM/FE)-N and a display circuit visualizes this numerical magnitude. The device can be used for weighing apparatus.

Abstract: The present invention relates to a load receiver. This load receiver comprises a fixed upright integral with a frame, a loaded upright integral with a load-carrying plate and two arms hinged on the uprights to form therewith a deformable parallelogram, and two uprights and the two arms together forming an integral structure, provided with constrictions which define the hinges of the deformable parallelogram, and a load transducer provided to detect the deformation of the parallelogram under the effect of a load applied on the plate. The load receiver is of use notably for commercial balances.

Abstract: The invention relates to a load receiver for weighing purposes, of the type comprising a stationary upright integral with a frame, a loaded upright integral with a load-carrying plate, and two arms 21 and 22 hinged onto these uprights in order to form therewith a deformable parallelogram. The two uprights and the two arms form an integral unit, the joints being defined by constrictions of the constituent mounting. A capacitor load transducer is formed by a first electrode mounted integrally with the stationary upright and by a second electrode mounted on the parallelogram elsewhere than on the stationary upright. The load receiver is of use notably for commercial balances.

Abstract: The invention relates to a load receiver comprising an upper plate 10 and lower plate 11, and a weighing mechanism located between them.The weighing mechanism is made of two half-beams 12 and 13 supported on pieces 128 and 138 hinged on one side with respect to the upper plate 10 and on the other side with respect to the lower plate 11. Connected at their center by an elastic strip 14 having a constriction 140, these beams receive a flection related to the load. This flection is transferred by arms 15 and 16 to electrodes 151 and 161 forming a capacitor. By measuring the capacity of the capacitor, the weight of the load is obtained. The invention is of use notably for flat bathroom scales.

Abstract: Capacitance measuring device for measuring a physical quantity proportional or inversely proportional to the capacitance X of a first capacitor. A oscillating circuit includes a second capacitor having a reference capacitance X.sub.E or the first capacitor during successive reference and measuring phases under control switching network respectively. A counter counts a predetermined oscillation pulse number N.sub.E during the reference phase and a oscillation pulse number N.sub.X during the measuring phase. The duration of two phases are equal or in a predetermined ratio R by means of a counter-down-counter which counts and down-counts the same number of clock pulses at least a predetermined frequency. The change of the counting to down-counting condition is controlled by the counter when its count is equal to N.sub.E. The stopping of the counter is controlled by the counter-down-counter when its count is equal to zero at the end of the measuring phase.