Abstract: A blade (1) provided with a fitting (2) for fastening to a hub and with an airfoil element (10) having a spar (20) extending spanwise from an attachment zone (21) towards a distal zone (22), said attachment zone (21) surrounding a centrifugal force transmission bushing (31) that is connected to said fitting (2) by a through pin (3). The blade comprises a twisting force transmission member (40) provided with a first half-shell (41) and with a second half-shell (42) that together surround said attachment zone (21), each half-shell (41, 42) having a perforated first portion (43?, 43?) giving visual access to said bushing (31) when said airfoil element is removed from the fitting, and a second portion (44?, 44?) co-operating with a torsion box (50) surrounding said distal zone (22), said transmission member (40) being secured to said fitting in rotation about a torsion axis (AX) of the blade (1).

Abstract: A blade (1) provided with a fitting (2) for fastening to a hub and with an airfoil element (10) having a spar (20) extending spanwise from an attachment zone (21) towards a distal zone (22), said attachment zone (21) surrounding a centrifugal force transmission bushing (31) that is connected to said fitting (2) by a through pin (3). The blade comprises a twisting force transmission member (40) provided with a first half-shell (41) and with a second half-shell (42) that together surround said attachment zone (21), each half-shell (41, 42) having a perforated first portion (43?, 43?) giving visual access to said bushing (31) when said airfoil element is removed from the fitting, and a second portion (44?, 44?) co-operating with a torsion box (50) surrounding said distal zone (22), said transmission member (40) being secured to said fitting in rotation about a torsion axis (AX) of the blade (1).

Abstract: A rotorcraft blade is provided having at least one spar and an outer covering. At the root of the blade, the spar is subdivided into at least one bottom tape and at least one top tape. The blade further includes a hollow cuff whose outer wall includes the outer covering secured to the bottom and top tapes.

Abstract: The present invention provides a three-level inverter including first and second direct voltage generators connected in series, each between a common center point and first and second end points, and first and second switching arms. Each of the first and second switching arms are connected between a respective one of the first and second end points and an output point and include at least one IGBT transistor. The IGBT transistors of the first and second switching arms are in series between the first and second end points. Each of the IGBT transistors includes an antiparallel-connected diode. The three-level inverter also includes a third switching arm which includes two IGBT transistors connected head-to-tail. Each head to tail transistor includes an antiparallel-connected diode.

Abstract: A rotorcraft blade is provided having at least one spar and an outer covering. At the root of the blade, the spar is subdivided into at least one bottom tape and at least one top tape. The blade further includes a hollow cuff whose outer wall includes the outer covering secured to the bottom and top tapes.

Abstract: A Francis runner that includes a crown, a band and blades which extend between the crown and the band. An angle (?24) between a linear speed (U, D224) of one of the blades and a median of the blade at the trailing edge, has a value between 20 and 25°. As a result, a machine utilizing the Francis runner of the invention is efficient, while an equivalent power under high load is high.

Abstract: The invention relates to a Francis runner comprising a crown, a band and blades (2) which extend between the crown and the band. The value of the angle (?24) between the linear speed (U, D224) of a blade (2) and the median (25, ?214) of said blade (2) at the trailing edge (22) has, in the vicinity of the point (224) at which the blade (2) is attached to the band, has a value included between 20 and 25°. In this way, the machine has a satisfactory efficiency while the equivalent power under high load can be high.

Abstract: Coated solid bodies comprising a core of an active composition and having a water-soluble or dispersible micro-porous or net-coating. The coating improves the mechanical characteristics of the solid body and allows for good dissolution. The coated solid bodies preferably take the form of detergent tablets.

Abstract: The invention concerns a method which consists in: pre-positioning, in a housing (7) of a flange (5), a bucket (2) supported by part (23) of its outer surface (23) against an edge (71) of the housing (7) providing a space (E′) between the convex surface (23B) of the outer radial part (2B) of the bucket (2) and said edge (71); producing an articulated linkage (15) of the bucket (2) on the rim (1) and/or the flange (5) on the inside (2A) of the bucket (2); exerting on the outer radial part (2B) of the bucket (2) a first calibrated force to bring it closer to the edge (71); determining the distance (e) between said outer radial part (2B) and said edge (71) under said force; slackening said force; arranging, between said outer radial part (2B) and said edge (71), a wedge (53) having a thickness substantially equal to said distance (e); and exerting on the outer radial part (2B) of the bucket a second force (F2) to bringing it closer to the edge and maintaining said second force (F2) which has an intensity n

Abstract: Coated solid bodies comprising a core of an active composition and having a water-soluble or dispersible micro-porous or net-coating. The coating improves the mechanical characteristics of the solid body and allows for good dissolution. The coated solid bodies preferably take the form of detergent tablets.

Abstract: Frame-oriented serial data, such as PCM data, are switched. Switching information is generated with the aid of a switching algorithm. The switching information is referred bit by bit to the data and it includes addresses of output lines of an interface of the apparatus. Because of the bit by bit switching, data from channels with a largely arbitrary bandwidth can be switched without passing multiple times through the switching apparatus. A bypass data path renders it readily possible to switch the last bit of an arriving PCM frame to the first bit of the next PCM frame. Thus each arbitrary bit of an input frame can be switched with a fixed delay of one PCM frame. The apparatus is advantageously embodied as an applications-specific circuit.

Abstract: The invention concerns a method which consists in: pre-positioning, in a housing (7) of a flange (5), a bucket (2) supported by part (23c) of its outer surface (23) against an edge (71) of the housing (7) providing a space (E′) betwen the convex surface (23B) of the outer radial part (2B) of the bucket (2) and said edge (71); producing an articulated linkage (15) of the bucket (2) on the rim (1) and/or the flange (5) on the inside (2A) of the bucket (2); exerting on the outer radial part (2B) of the bucket (2) a first calibrated force to bring it closer to the edge (71); determining the distance (e) between said outer radial part (2B) and said edge (71) under said force; slackening said force; arranging, between said outer radial part (2B) and said edge (71), a wedge (53) having a thickness substantially equal to said distance (e); and exerting on the outer radial part (2B) of the bucket a second force (F2) to bringing it closer to the edge and maintaining said second force (F2) which has an intensity n

Abstract: An object manipulator robot device includes a pick-up member made from a thermally conductive material and having at least one surface of contact with the object to be picked up, a system for cooling the pick-up member to freeze the interface between the member and the object, thereby fastening them together, including a local system for cooling the pick-up member directly and a peripheral system for cooling the local system, a system for heating the member to liquefy the interface, thereby releasing the object, and a control system for the cooling and heating systems. The local cooling system includes a pair of local cooling elements mounted on respective opposite sides of the pick-up member and the peripheral cooling system includes a pair of peripheral cooling elements connected to the local cooling elements by arms made from a material of high thermal conductivity, such as copper.

Abstract: The cable (1) comprises a plurality of optical fibre micro-modules (2) grouped together inside an external sheath (4). The external portion of the latter has four bosses (5) moulded integral therewith and which extend along the entire length of the cable and form, along the generating lines of the cable, four diametrically opposed ribs. These bosses, by creating a special arrangement for application to the cable of compressive forces, produce an improvement in crushing strength.

Abstract: A process is provided for the treatment of suspensions comprised of oil, water and solids in which the suspension is subjected to centrifugation employing a centrifugal filter, coated with an organic powder having an index of compressibility comprised between 0 and 1.2, and wherein under the effect of the centrifugation, the suspension is subjected to an acceleration comprised between 10 and 2500 times the gravity force, that is, 100 to 25000 m/s.sup.2. The solids are retained by the coating and the centrifugate is collected. The invention is useful for the treatment of crude oil, of lubricants and oils which produce suspensions or emulsions rich in fats.

Abstract: Elastic suspension leaf (1) made of composite material of which the extremities have a width which decreases concomitantly with a thickness increase, comprising connectors forming a rigid casing and defining an inner trapezohedral volume which fits on the extremities of the leaf. The casing includes a cylindrical ring (9) for connection to a wheel. The connector is comprised of metal elements (10,11,12) or of fiber ribbons embedded in a synthetic resin.

Abstract: Arctic berm for offshore structure foundation. It is made of several ballasted ice slabs stacked one over the other and welded together to form a solid mass. The berm is obtained by delimiting a uniform ice thickness area over landfast ice, area made up of a central rectangle and arms radiating from the central rectangle, each arm defining successive rectangles. After all rectangles are ballasted sufficiently for them to sink when cut as slabs, one rectangle is cut into a first slab, is allowed to sink slightly and the rectangle next to it in one of the arms is cut and moved over the first slabs to be welded to it into a solid mass. The remaining rectangles of the arms are, in turn, likewise cut and moved over the already piled slabs and welded to them until the berm is finally obtained.

Abstract: A stake is provided in the form of a smooth cylindrical metal rod which has a point at its lower end and to which is welded a screw thread formed by a helical spring having a polygonal cross-section, preferably a square section, which is welded to the rod at a limited number of spaced-apart points, at least a part of the spring being thus free to move with respect to the rod. Preferably, only the lower end of the spring is welded to the rod. The stake is more especially, but not exclusively, usable for measuring the electrical resistances of ground connections.

Abstract: An electromagnetic relay comprising a base of insulating material carrying stationary and movable contacts and output lugs, and a motor assembly, the latter comprising a right-angled yoke, a core with its coil, crimped to the inner face of a first one of the two flanges of the right-angled yoke, and an armature pivotally mounted to the free end of the second flange of said yoke and having bent arms operable to actuate the movable contacts when the base is fixed to the outer face the second flange and the coil is energized. The coil has a spool or frame with at least one end flange provided with metal tongues for coil connection extending towards the base and passing through apertures in the second flange of the yoke, said tongues resiliently engaging inner ends of associated ones of said output lugs.

Abstract: A magnetic flywheel for a manually-driven magneto megohmmeter with step variable voltage comprising a rotor formed by a ring of magnetic material carrying permanent magnets, and a stator, disposed inwardly of the rotor and formed by an assembly of magnetic circuits each having a C-shape with a coil wound around the central portion thereof and with two pole surfaces at the ends. In order to reduce the starting torque, the number of pairs of permanent magnets is one less than the number of magnetic circuits, and the angular distance between the pole surfaces of one magnetic circuit is equal to the angular distance between two adjacent permanent magnets. Also, the arc length of each pole surface of a magnetic circuit is substantially equal to half the angular distance between two adjacent permanent magnets.