Abstract: The present patent application belongs to the field of workplace safety equipment and proposes an improvement to a device provided with a hook for anchoring a ladder to cables. The ladder is formed by a main structure (1) having in the center thereof an articulated hook (2). The main structure (1) comprises an extensible shaft in the upper portion thereof, allowing it to be coupled between two steps of a service ladder. In order to overcome drawbacks, a rope holder (8) has been developed, which is arranged in the lower portion of the main structure and locks the rope tying the hook (2), preventing the hook (2) from turning upside down or from opening.

Abstract: A forging die includes on one face, a half-imprint of a part to be forged such as a turbine engine blade. The die also includes on the face, a device for forming a marking along two directions relatively to which the position of the imprint is defined, the device including two pads protruding relatively to the face and each including two notches defining the two directions. This device preferably includes two pads machined on the die at the same time as the imprint, and each including two notches in the form of a cross.

Abstract: A method for three-dimensional measurement of coordinates of a set of N predetermined points of the surface of a mechanical part to be measured, relatively to a predetermined reference system, and the direction cosines of the theoretical normals thereto at the theoretical points corresponding to the N predetermined points are known, and including a preparatory phase, in which the coordinate points, corresponding to the N predetermined points of a first mechanical part taken as a standard part, are measured; an initialization phase, in which displacement measurements (along the normals are read on the N points of the standard part; a measurement phase, in which N linear displacement measurements performed on the N points of the part to be measured corresponding to the N points of the standard part, are read; and a computation phase, in which the coordinates of the N points of the part to be measured are computed.

Abstract: The invention relates to a method for the three-dimensional measurement of coordinates (xli, yli, zli) of a set of N predetermined points (Plij) of the surface of a mechanical part to be measured, relatively to a predetermined reference system (Ro), and the direction cosines (cxthij) cythij, czthij) of the theoretical normals (Nthij) thereto at the theoretical points (Pthij) corresponding to said N predetermined points (Plij) are known, and including: a preparatory phase, in which the coordinates (xoij, yoij, zoij) of N points (Poij), corresponding to said N predetermined points (Plij) of the surface of a first mechanical part taken as a standard part, are measured relatively to the predetermined reference system (Ro), an initialization phase, in which N displacement measurements (loij) along said normals (Nthij) are simultaneously and respectively read on said N points (Poij) of said standard part, a measurement phase, in which N linear displacement measurements (llij), simultaneously and respectively perfor

Abstract: The present invention relates to a forging die including on one face, a half-imprint of a part to be forged such as a turbine engine blade. The die is characterized by the fact that it includes on said face, a means forming a marking along two directions relatively to which the position of said imprint is defined, said means consisting of two pads protruding relatively to said face and each including two notches defining said two directions. This means preferably consists of two pads machined on the die at the same time as the imprint, and each including two notches in the form of a cross. The invention thus allows visual checking of the positioning of the imprints and of the dies on the platens of the press.

Abstract: In a computerized method, a computer program is analyzed while the program is interpreted. The program is expressed in a first memory as input values and functions. Some of the input values are complex values which can have a plurality of component values. Each function operates on combinations of the input values and the functions of the program. The program is interpreted in a processor connected to the first memory. The processor is also connected to a second memory to store result values produced during the interpretation. Selected input values, components of the complex values, and functions are named only if the selected values, components, and functions are necessary to produce a selected result value. For each function of the program, the function which is interpreted, the input values on which the function depends, and the result value produced by the function during interpretation, are recorded in the second memory to dynamically perform a precise dependency analysis of the program.

Abstract: Remotely assemblable and disassemblable fuel assembly comprising a mechanical structure constituted by an upper plate, a lower plate and a plurality of brace rods extending between the said plates, and a plurality of elongated fuel elements fixed to the brace rods by gratings, one of the ends of each brace rod being irremovably fixed in the upper plate, the other end of each brace rod being fixed to the lower plate by a system of remotely assemblable and disassemblable assemblies, wherein the said system of assemblies comprises a thread made at the end of each brace rod, a screwing member having a thread able to cooperate with the thread on the brace rod and a head having a plug hole and on its periphery at least one chamfer, as well as machining in the lower plate, constituted by a bore having a larger diameter portion issuing into the outer face of said plate, said larger diameter portion being surrounded by a flange shaped by cutting in the plate and which is separated from the remainder of the plate by an

Abstract: Apparatus for introducing a fuel element into a fuel assembly is constituted by a plurality of vertical fuel elements and a structure for fixing said fuel elements, whereby the fuel elements have a positioning given by the fuel assembly and has an introduction plate fixed to the upper face of the fuel assembly. The plate has a plurality of orifices for the passage of a fuel element, the orifices positioning the fuel elements in the fuel assembly. A tool grips a fuel element for introduction thereof into a fuel assembly. Lifting means moves the tool in horizontal displacements between a storage rack for the fuel elements and one of the orifices of the introduction plate.

Abstract: In an assembly of two parts having flat assembly faces, the upper part has a bore provided with an ovalized orifice and the lower part has an internally-threaded bore, the two bores being coaxial when the parts are in the assembly position. A first connecting member has a threaded end in cooperating relation with the internally-threaded bore and a second connecting member has a portion in contact with one face of the upper part. One member has an ovalized portion which cooperates with the ovalized orifice and has a deformable portion which cooperates with the other member after crimping in order to secure the two members at least against rotational motion.

Abstract: The invention relates to a structure of open porosity in the form of a flat or curved panel made up of superposed layers of fibres with the orientation of the fibres varying from one layer to the next. The fibres are boron filaments held parallel in each layer by criss-crossing of filaments with another type. The boron filaments are bonded together at their crossing points to join superposed layers.The invention also provides a method of making such porous structure.

Abstract: In a pressurized water reactor, the pressure vessel contains a plurality of fuel wrappers of parallelepipedal section supported on a lower grid which carries projecting sleeves equal in number to the wrappers. Each sleeve penetrates into a bore of a wrapper base plate and has a higher coefficient of thermal expansion than the base plate so that its external diameter is smaller than that of the bore in the cold state and equal thereto at the operating temperature of the reactor. The bore is thus clamped against the sleeve as a result of thermal expansion, the fuel assemblies being secured within the wrappers by means of spring-type elastic devices.