Abstract: Altitude measurement device including an atmospheric pressure sensor arranged to be compressed or to expand in a rectilinear direction as a function of the atmospheric pressure to be measured which increases or decreases, wherein the movements of deformation of the atmospheric pressure sensor are transformed, via a transmission system, into a pivoting motion, in a plane perpendicular to the rectilinear direction of deformation of the atmospheric pressure sensor, of an activation system which drives the pivoting of an indicator hand, wherein the indicator hand moves over a graduated circular scale, wherein the atmospheric pressure sensor is arranged to be able to be moved in one direction or in the opposite direction depending on the rectilinear direction of deformation thereof relative to the other components of the altitude measurement device, wherein the atmospheric pressure sensor is mounted on a seat which is fixed in a support, which forms a case with a cover.

Abstract: Sealed device for calibrating an altitude measurement device comprising an atmospheric pressure sensor whose movements of deformation are converted, via a transmission system, into a pivoting motion of an activation system that drives the pivoting of an indicator hand, wherein a sensing element bearing on the atmospheric pressure sensor is rigidly fixed to a transmission shaft movable along its longitudinal axis of symmetry, wherein the calibration device includes an air intake that can adjust the pressure inside the calibration device as required, and also includes a first button via which the axial position of the transmission shaft can be adjusted, and a second button via which it is possible to move the atmospheric pressure sensor up or down. The invention also concerns a method for calibrating the altitude measurement device using the sealed calibration device.

Abstract: A method for manufacturing a component in a substrate including: a) modifying a structure of at least one region of the substrate to make the at least one region more selective; and b) chemically etching the at least one region to selectively manufacture the component.

Abstract: Sealed device for calibrating an altitude measurement device comprising an atmospheric pressure sensor whose movements of deformation are converted, via a transmission system, into a pivoting motion of an activation system that drives the pivoting of an indicator hand, wherein a sensing element bearing on the atmospheric pressure sensor is rigidly fixed to a transmission shaft movable along its longitudinal axis of symmetry, wherein the calibration device includes an air intake that can adjust the pressure inside the calibration device as required, and also includes a first button via which the axial position of the transmission shaft can be adjusted, and a second button via which it is possible to move the atmospheric pressure sensor up or down. The invention also concerns a method for calibrating the altitude measurement device using the sealed calibration device.

Abstract: Altitude measurement device including an atmospheric pressure sensor arranged to be compressed or to expand in a rectilinear direction as a function of the atmospheric pressure to be measured which increases or decreases, wherein the movements of deformation of the atmospheric pressure sensor are transformed, via a transmission system, into a pivoting motion, in a plane perpendicular to the rectilinear direction of deformation of the atmospheric pressure sensor, of an activation system which drives the pivoting of an indicator hand, wherein the indicator hand moves over a graduated circular scale, wherein the atmospheric pressure sensor is arranged to be able to be moved in one direction or in the opposite direction depending on the rectilinear direction of deformation thereof relative to the other components of the altitude measurement device, wherein the atmospheric pressure sensor is mounted on a seat which is fixed in a support, which forms a case with a cover.

Abstract: A capsule including two shells secured to each other so to be joined by a common closed surface and together defining, on both sides of the surface, a closed space delimited by the shells. At least one of the two shells is a flexible membrane configured to deform under effect of a physical magnitude. At least the membrane is made of at least partially amorphous metal alloy to optimize dimensions of the capsule.

Abstract: A method for manufacturing a component in a substrate including: a) modifying a structure of at least one region of the substrate to make the at least one region more selective; and b) chemically etching the at least one region to selectively manufacture the component.

Abstract: A capsule including two shells secured to each other so to be joined by a common closed surface and together defining, on both sides of the surface, a closed space delimited by the shells. At least one of the two shells is a flexible membrane configured to deform under effect of a physical magnitude. At least the membrane is made of at least partially amorphous metal alloy to optimize dimensions of the capsule.

Abstract: Capillary depth gauge (1) including at least one capillary tube (2) of triangular section arranged against a background (3) opposite an observation surface (5) and visible by transparency from the observation surface when the tubular section is substantially filled with water, at least one reflection surface (4), visible by reflection from said observation surface when the tubular section is substantially filled with air, said tube forming an isosceles triangle whose equal angles (?) have an angular value of between 48 and 60 degrees.

Abstract: The invention concerns a pressure sensor (5), particularly for a depth gauge (1), capable of having a high level of precision, owing to sufficient elastic deflection amplitude of the diaphragm (or membrane), while avoiding any risk of plastic deformation. The diaphragm (12) is formed by a flat metal disc. The peripheral region (13) thereof is neither welded nor inset, but it is pre-stressed against a stop strip (25) with a closed, preferably circular contour, and can pivot on the stop strip (25) when the diaphragm bends under the effect of fluid pressure in the pressure chamber (10). The pre-stressing may be achieved via a sealing gasket (21) located opposite the stop strip (25). Between said strip and a central aperture (15), a concave stop surface (20) limits the deflection of the diaphragm (12) and prevents any plastic deformation in the event of excessive pressure. Manufacture of the diaphragm is simple, with a high level of reproducibility, assembly is easy and the seal quality is high.

Abstract: Capillary depth gauge (1) including at least one capillary tube (2) of triangular section arranged against a background (3) opposite an observation surface (5) and visible by transparency from the observation surface when the tubular section is substantially filled with water, at least one reflection surface (4), visible by reflection from said observation surface when the tubular section is substantially filled with air, said tube forming an isosceles triangle whose equal angles (?) have an angular value of between 48 and 60 degrees.

Abstract: The invention concerns a pressure sensor (5), particularly for a depth gauge (1), capable of having a high level of precision, owing to sufficient elastic deflection amplitude of the diaphragm (or membrane), while avoiding any risk of plastic deformation. The diaphragm (12) is formed by a flat metal disc. The peripheral region (13) thereof is neither welded nor inset, but it is pre-stressed against a stop strip (25) with a closed, preferably circular contour, and can pivot on the stop strip (25) when the diaphragm bends under the effect of fluid pressure in the pressure chamber (10). The pre-stressing may be achieved via a sealing gasket (21) located opposite the stop strip (25). Between said strip and a central aperture (15), a concave stop surface (20) limits the deflection of the diaphragm (12) and prevents any plastic deformation in the event of excessive pressure. Manufacture of the diaphragm is simple, with a high level of reproducibility, assembly is easy and the seal quality is high.