Abstract: A rotorcraft (1) having a feed unit for feeding fuel to a power plant (13) of the rotorcraft (1). A middle floor (12b) is securely engaged with at least two frames (9a, 9b) of the fuselage, and being load-bearing relative to general forces supported by the fuselage. A bottom compartment (7) of the rotorcraft (1) does not have the load-bearing covering (8) of the fuselage, the bottom face of the fuselage being open to the outside providing the bottom compartment (7) with a bottom (17) open to the outside of the rotorcraft. The bottom face of the middle floor (12b) forms an anchor member for suspending at least one fuel tank (25, 26) that is accessible from outside the fuselage via said open bottom (17).

Abstract: A fuel storage device (10) having at least one tank (15), the tank (15) having a casing (20) extending upwards from a bottom (21) to a top wall (22). The storage device (10) is provided with at least one inflatable bag (25) arranged inside said casing, said device including inflation/deflation means (35) for inflating each inflatable bag (25) at least in part so as to reach an inflated volume prior to filling the tank, and for deflating said inflatable bag after filling in order to guarantee the presence of an expansion volume inside said tank.

Abstract: A tank (10) having a casing (20) with a bottom (21) together with a side wall (23) and a top wall 22. The tank (10) has at least one sloping wall (30) for providing at least one slope (30) for directing fuel towards a predetermined zone (100) of the tank (10) by gravity, the sloping wall (30) subdividing the inside volume of the tank into a main volume (V1) and an under-slope volume (V2) both of which are to receive fuel. The tank (10) is provided with a fuel transfer system (40) for transferring fuel from the under-slope volume (V2) to the main volume (V1), and from the main volume (V1) to the under-slope volume (V2).

Abstract: A method for detecting an attack, such as by laser, on an electronic microcircuit from a backside of a substrate includes forming the microcircuit on the semiconductor substrate, the microcircuit comprising a circuit to be protected against attacks, forming photodiodes between components of the circuit to be protected, forming a circuit for comparing a signal supplied by each photodiode with a threshold value, and forming a circuit for activating a detection signal when a signal at output of one of the photodiodes crosses the threshold value.

Abstract: A rotorcraft (1) having a feed unit for feeding fuel to a power plant (13) of the rotorcraft (1). A middle floor (12b) is securely engaged with at least two frames (9a, 9b) of the fuselage, and being load-bearing relative to general forces supported by the fuselage. A bottom compartment (7) of the rotorcraft (1) does not have the load-bearing covering (8) of the fuselage, the bottom face of the fuselage being open to the outside providing the bottom compartment (7) with a bottom (17) open to the outside of the rotorcraft. The bottom face of the middle floor (12b) forms an anchor member for suspending at least one fuel tank (25, 26) that is accessible from outside the fuselage via said open bottom (17).

Abstract: The invention relates to a drainage circuit (4) for a flow of a liquid (5), the circuit being fitted with a monitoring appliance (13) for monitoring an excess flow rate of the liquid (5). The monitoring appliance (13) comprises a monitoring duct (14) interposed between an upstream duct (7) for collecting the liquid (5) and a downstream duct (9) for discharging the liquid (5). The monitoring duct (14) has retaining means (15) for retaining part of the liquid (5) inside a chamber (16) arranged to receive a spillway (22) of the captured liquid (19) in a reserve (20) fitted with indicator means (23) with a visual scale for providing warning information relating to the quantity of liquid (24) contained in the reserve (20).

Abstract: A tank (10) having a casing (20) with a bottom (21) together with a side wall (23) and a top wall 22. The tank (10) has at least one sloping wall (30) for providing at least one slope (30) for directing said fuel towards a predetermined zone (100) of the tank (10) by gravity, said sloping wall (30) subdividing the inside volume of the tank into a main volume (V1) and an under-slope volume (V2) both of which are to receive fuel. Said tank (10) is provided with a fuel transfer system (40) for transferring fuel from the under-slope volume (V2) to the main volume (V1), and from the main volume (V1) to the under-slope volume (V2).

Abstract: A fuel storage device (10) having at least one tank (15), the tank (15) having a casing (20) extending upwards from a bottom (21) to a top wall (22). The storage device (10) is provided with at least one inflatable bag (25) arranged inside said casing, said device including inflation/deflation means (35) for inflating each inflatable bag (25) at least in part so as to reach an inflated volume prior to filling the tank, and for deflating said inflatable bag after filling in order to guarantee the presence of an expansion volume inside said tank.

Abstract: A method for detecting an attack, such as by laser, on an electronic microcircuit from a backside of a substrate includes forming the microcircuit on the semiconductor substrate, the microcircuit comprising a circuit to be protected against attacks, forming photodiodes between components of the circuit to be protected, forming a circuit for comparing a signal supplied by each photodiode with a threshold value, and forming a circuit for activating a detection signal when a signal at output of one of the photodiodes crosses the threshold value.

Abstract: The present invention relates to a method of assembly, in a furnace in vacuum conditions or under a neutral atmosphere, of two parallel plates leaving a closed internal space, consisting, in a first step, of performing a peripheral sealing by means of a first seal fusible at a first temperature, while maintaining open at least one opening of communication with the internal space and, in a second step, of closing the opening by means of a closing element with the interposition of a second seal fusible at a second temperature lower than the first temperature.

Abstract: A flat microtip display screen including a cathode provided with active areas of electron emission microtips; a cathodoluminescent anode provided, at least in front of the active microtip areas, with active areas of phosphor elements; a main grid of extraction of electrons emitted by the active microtips towards the phosphor elements; and on the cathode side, at least one sacrificial area of microtips adapted to being addressed, outside screen operation periods and independently from the active areas.

Abstract: The present invention relates to a flat display screen anode of the type including at least two sets of alternate parallel bands of anode conductors coated with phosphor elements to be excited by primary electrons, these bands being separated from one another by insulating bands including, at least at the surface, a material with a secondary emission coefficient which is lower than or equal to unity, at least in the energy range of the primary electrons.

Abstract: The present invention relates to a method and device for assembling two elements spaced apart by means of a peripheral seal, consisting of adding a seal on a surface of a first element facing a surface to be assembled of a second element, bringing the assembly thus constituted, in vacuum conditions, to a temperature enabling the melting of the seal while temporarily maintaining, by means of spacers having a thickness higher than the thickness of the seal and distributed outside the seal, the surface of the second element distant from the seal, and enabling the elements to come closer to each other to assemble them, sealably, by means of the melting seal.

Abstract: A flat display screen includes a cathode (1) with microtips (2) for the electron bombardment of the anode (5) having phosphor elements (7r, 7g, 7b), the cathode (1) and the anode (5) separated by a vacuum space (12) containing a progressive hydrogen release source comprised of a thin layer of hydrogenated material. The progressive hydrogen release source may comprise a resistive layer (11) of the cathode (1) on which the microtips (2) are arranged. The progressive hydrogen release source provides the microtips (2) with a substantially constant emitting power.

Abstract: The present invention relates to a flat display screen anode of the type including an active area having phosphor elements, the active area being surrounded with at least one track in a material having a secondary emission coefficient lower than or equal to one.

Abstract: An anode (5) for a flat display screen includes at least one group of phosphor strips (7) deposited over corresponding electrode strips (17) separated one from another by an insulating layer (8) etched out in front of the phosphor strips (7), and at least one conductor (21) interconnecting the electrode strips (17) of the group of phosphor strips (7). Each of the electrode strips (17) is formed by a resistive strip (18) for receiving one phosphor strip (7) and at least one biasing strip (19) which is parallel to and joins the interconnecting conductor (21). The biasing strip (19) has a low resistivity with respect to the resistivity of the associated resistive strip (18). The biasing strip (19) is parallel to, laterally borders, and is in contacting engagement with the resistive strip (18). The anode (5) eliminates the risk of electrical arcs between the anode (5) and gate (3) or between adjacent phosphor strips (7) of the anode (5), without impairing the brightness of the screen.