Abstract: A process for moulding high strength elongated parts made of a fibre-resin composite material, especially turbomachine blades such as fan blades, is disclosed wherein a plurality of heating and cooling elements are arranged within the body of the mould at intervals along the length of the mould cavity, and the liquid resin which is injected at one end into the mould cavity containing the fibre preform is polymerized progressively from the opposite end of the mould cavity, while maintaining the supply of liquid resin under pressure to the cavity, by successively de-activating the cooling elements, which maintain the resin in the liquid state, at predetermined time intervals starting from said opposite end of the mould cavity and progressing in turn towards said one end, and in synchronism therewith successively activating the heating elements to raise the temperature of the resin to the polymerizing temperature progressing in turn from said opposite end to said one end of the mould cavity.

Abstract: A turbomachine blade, particularly a fan blade for an aircraft jet engine, is made of a composite material comprising reinforcing fibres embedded in a thermosetting resin matrix, wherein the reinforcing fibres form a multilayer woven fabric in which the warp fibres of each layer are interwoven not only with the weft fibres of the layer but also with the weft fibres of at least the layers immediately above and below it so that the layers are all interconnected. Also, each layer only partly covers the layer below it so that the ends of the warp and weft fibres of a layer extend to near the surface of the blade, and the thickness of the blade at any point is determined by the number of layers present at that point.

Abstract: An apparatus and method enables a user to control the selection of electronic multimedia services to be provided to the user by one or more servers over a communication medium. The apparatus includes a scanner for reading marks on an object and for communicating a request signal, having an object code representing the read marks, to a user interface. The interface receives the request signal and transmits to the servers a request command including an interface identification code and the object code which is used to select the desired electronic multimedia service. The servers identify the selected electronic multimedia service using the object code. The interface then enables the selected electronic multimedia service transmitted from the servers to be received by the user's receiver.

Abstract: The invention relates to walls that are used for constructing radomes, in particular radomes for aircraft radars, as well as radomes using such walls.According to the invention, the inner and outer layers of said wall are separated by a central core including a central portion made of dielectric material flanked by two lateral portions made of the same dielectric material but with a recess, the aggregate of said portions being obtained by juxtaposition of elemental dominoes.

Abstract: The device comprises an arch-like structure (3), shaped similar to a cage, which can be fixed to the motorcycle (1), essentially to its frame and sides; a parafoil sail (5), which can be mounted at the top of the cage, the sail ends being lowerable by a pedal or handle control; a propeller propulsion system (8) mounted at the rear of the motorcycle on the arch-like structure; and a clutching and declutching mechanism which, on control, drives either the driving wheel or the propeller.

Abstract: A snow removal apparatus adapted to be mounted on a vehicle, for removing snow from a light fixture protruding from the ground. Structure is provided for creating a flowing stream of air and a nozzle connected to the air stream directs the air stream at the ground, the directed stream of air having a flow velocity of at least about 180 m.p.h. The nozzle is adapted to be operatively positioned adjacent the ground at an angle to deflect the directed air stream on the ground at a predetermined distance from the light fixture so as to cause the deflected air stream to impinge on the light fixture at a reduced velocity sufficient to remove snow therefrom without damaging same, and to spread over a surrounding area with sufficient pressure to clear the area of snow.

Abstract: The present invention relates to a process and device for the detection and quantification of agglutinates, in recipients of which at least the bottom are transparent. According to the invention, it is decided that there is agglutination when, at the same time, the calculated mean value of the bottom of the reaction studied is higher than that of a reference sample and when there exist points of measurement whose transmission is less than said threshold, and, on the other hand, that there is no agglutination when, at the same time, this calculated mean value is not greater than that of said reference sample and when there exist no points of measurement whose transmission is less than said threshold. The invention is more particularly applicable to immunohaematology.