Cegedur Societe De Transformation De L'aluminium Pechiney

Francois Colas

A method of mounting an annular element on a tube which involves surrounding said tube by a tubular sleeve of aluminum or an alloy thereof, which is sufficiently thin to be plastically deformable and has a similar cross-section, with suitable clearance, with one of the sleeve ends having an outside bevel; surrounding said tube, on the side of the sleeve bevel, with an annular element to be fastened, wherein the annular element has at least one opening whose crosswise dimensions are greater than those of the tube, but whose radial clearance with said tube is less than the thickness of the sleeve, and which has, on the sleeve side, an inside bevel whose maximum crosswise dimensions are greater than the crosswise dimensions of the end of the element and the sleeve toward one another, by a suitable means, and introducing the sleeve, by force, between the annular element and the tube by plastically deforming the sleeve and tube, thereby mounting the annular element. The present method is used advantageously, for example, for frameworks, bridges, scaffolding and offshore drilling platforms.

Method of mounting an annular element on a metal tube of aluminum or an

A coupling for two tubes forcibly engaged one into the other, the two tubes being substantially of the same sections while the female tube is engaged into a sleeve or an opening whose diameter is little larger than the outside diameter of said tube. Thus, the female tube is crimped or banded in the sleeve or opening while the male tube is forced to contract. This assembly means may be used for making balustrades or ladders or assembling various members which are fixed with respect to the tubes or the ring.

Coupling of a tube to a ring member

The invention concerns a cylindro-parabolic reflector for focusing solar rays on the focal axis of the cylinder. The reflector comprises modular elements which are assembled by means of tubes which are interengaged strictly in alignment with each other. The complementary male and female ends of the tubes have been formed by the tubes previously having been forcibly engaged into each other. This makes it possible to provide reflectors of substantially perfect parabolic shape, in spite of their substantial length. The invention will be used primarily in the construction of solar steam generating stations.

Solar energy focusing means comprising modular elements

The invention relates to a method for quickly joining pipes by chamfering the end of a thin pipe, forcefully socket jointing this pipe in a pipe of the same diameter, dismantling the two pipes by traction. The two pipes can thereafter be rejoined easily and quickly by socket-jointing.

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Bourg la Reine, France

Francois Colas