Abstract: A method for repairing damage to the coating of an aircraft fuselage, the coating being made of fiber-reinforced composite material. This method comprising making a cut-out in the fuselage with a substantially parallelepipedal outline around the damage and drilling a circular hole substantially centered on the intersection of the sides of the outline of the parallelepiped of the cut-out at each of the corners of the outline before the cutting out operation.

Abstract: A process for cutting out a damaged area of an aircraft fuselage, in particular so as to repair the damaged area, includes in making at least one cut-out in the fuselage (20) so as to delimit a cut-out area (24) that encompasses the damaged area and that includes at least one flare-out, characterized in that it includes making a hole (34) at the flare-out of the cut-out area (24) with a tool whose diameter corresponds to that of the desired flare-out.

Abstract: A block including at least one glass ply at least partially covering an outer surface of a core made from composite material. A method for reinforcing a block made from a composite material, including a glass ply placed in a mold, such as to cover the base of the mold; the block is positioned in the mold; the edges of the glass ply are folded such that the glass ply is molded to the outer edge of the block; the mold is closed with a cover; the block housed inside the mold is cured in an oven such as to polymerize the glass ply; and the glass-ply-covered block is recovered.

Abstract: The invention relates to a method for repairing aircraft primary structures. More specifically, the invention relates to a method for repairing damage to the coating of an aircraft fuselage, which coating is made of fiber-reinforced composite material. This method comprises a step consisting of making a cut-out in the fuselage with a substantially parallelepipedal outline around the damages and of drilling a circular hole substantially centered on the intersection of the sides of the outline of the parallelepiped of the cut-out at each of the corners of said outline before the cutting out operation.

Abstract: A block including at least one glass ply at least partially covering an outer surface of a core made from composite material. A method for reinforcing a block made from a composite material, including a glass ply placed in a mould, such as to cover the base of the mould; the block is positioned in the mould; the edges of the glass ply are folded such that the glass ply is moulded to the outer edge of the block; the mould is closed with a cover; the block housed inside the mould is cured in an oven such as to polymerize the glass ply; and the glass-ply-covered block is recovered.

Abstract: A process for cutting out a damaged area of an aircraft fuselage, in particular so as to repair the damaged area, includes in making at least one cut-out in the fuselage (20) so as to delimit a cut-out area (24) that encompasses the damaged area and that includes at least one flare-out, characterized in that it includes making a hole (34) at the flare-out of the cut-out area (24) with a tool whose diameter corresponds to that of the desired flare-out.

Abstract: The invention concerns a drive interface (1) for an electronic static switch (3) such as a blocking thyristor or a transistorized blocking switch; this interface is inserted between said static switch and a control stage (2) designed to generate a logic control signal. Said interface comprises a circuit (5) for detecting the voltage across the two power electrodes of the static switch (3) and a drive circuit (6) receiving the signal emitted from the circuit (5) and the control signal; this drive circuit is designed to assure a polarity on the control electrode (3c) of the static switch such that:said polarity corresponds to blocking the switch when the control signal carries an OFF command, and/or the voltage across the power electrodes is different from 0,said polarity corresponds to the conduction state of the switch when the control signal corresponds to permission to conduct an the voltage across the power electrodes is near 0.

Abstract: The present invention relates to a method and a device for forming special color effects wth at least an electrical lamp which is supplied with a pulsed current and moved by a relative movement into space. The device supplies the electrical lamp with an electrical current which is pulsed during a time T1 in accordance with a pulsating period T, the cyclic ratio T1/T varying between 0 and 1 and the frequency 1/T varying from 1 to 500 Hz.

Abstract: A static conversion assembly comprises a serial connection of n apparatus each formed by the association of two converters (.DELTA.) of the type described in U.S. Pat. No. 4,330,819. Each control stage of a given apparatus (..) is adapted to furnish opposite control signals to the two controlled blocking static interrupters of each apparatus (.DELTA.). In addition, the assembly of control stages of the apparatus (.DELTA.) is driven by a centralized control unit (56) which provides a delay in the control signals of an apparatus (.DELTA.) with respect to the control signals applied to a preceeding apparatus in the serial arrangement thereof. In addition, a voltage distribution stage (51) is connected to the apparatus (..) in order to divide the applied voltage and apply only a fraction thereof to each interrupter.

Abstract: A static energy converter apparatus, having at least one converter .GAMMA. conforming to that described in U.S. Pat. No. 4,330,819, includes a supplementary output stage 21 adapted to produce an alternating current that changes direction upon each commutation of the controlled blocking static interrupters of the converter .GAMMA.. Stage 21 is such that the direction of the alternating current corresponds to the direction of circulation of current in the collector-emitter of each interrupter at the instant of commutation.

Abstract: An apparatus for the continuous and direct measurement of the temperature of the upper superficial layer of the surface of the sea or other water surface, which apparatus comprises a central floating member and at least one arm connecting the central member to at least one peripheral floating element, the or each arm containing a thermal collector for transmitting heat to at least one temperature detector carried by the apparatus, wherein the central member and the peripheral floating element are adapted to maintain the apparatus on the water surface while at least a part of the or each arm is in contact with and senses the upper superficial layer of the water, and wherein electrical means are provided in the apparatus for the storage and/or transmission of temperature data from the or each temperature detector.

Abstract: The invention relates to a static semi-conductor electrical energy converter.The converter is of the type comprising a power stage 5 provided with at least one power transistor 7, and a control stage 1 furnishing a control signal S.sub.C appropriate for the conversion to be carried out; according to the invention, each transistor is a transistor having a voltage V.sub.CEX greater than its voltage V.sub.CEO and is associated with an intermediate stage 4 for treatment of the control signal S.sub.C. This stage 4 is adapted to drive the base of the said transistor to guarantee operation thereof over a voltage range extending from 0 to V.sub.CEX thus making it possible to take advantage of the improved voltage V.sub.CEX of the said transistor.The invention is applicable in particular in the case of inverters adapted to convert a continuous electric voltage into an alternating electric voltage.

Abstract: Apparatus for stacking and storing a plurality of flat objects, such as letters. The apparatus includes at least one storage box and a loading device designed to transport the flat objects from a source and to project them into the interior of the box. The box and loading device are respectively positioned so that the flat objects are projected into the box at an incline with respect to its bottom and a portion of each object's leading edge impacts a stopping surface formed in one of the side walls of the box. This impact imparts a rotational couple to the object which brings the lower edge of the object into firm engagement with the box bottom. The object is then moved onto the stack of similar objects being formed in the box, either by gravity or an auxiliary device. In one preferred embodiment, relative movement is provided between the box and loading device so that the objects can be projected into the box at a point close to the top of the stack.