Abstract: A method for producing a winding, particularly for electrical transformer from a cylindrical tubular metal element of polygonal cross-section, includes steps of machining, in a first series of passes, a first series of cuts substantially parallel to one another through all of the sides of the tubular element with the exception of a last one of said sides, and machining, in a second series of passes, a second series of cuts in said last one of said sides in order to ensure that junctions of the first series of cuts open out in the sides adjacent to the second series of cuts, so that the first and second series of cuts are continuous with respect to one another and constitute a single groove of helicoidal shape.

Abstract: An installation for heating grounds, in particular sports grounds, using cables (9, 9?, 9?) supplied with electric current which are buried in the ground. The installation is characterized in that the surface of the grounds to be heated is divided into a number of sectors (1a, 1b, 1c, . . . , 1n), and each sector is heated by at least two heating lines (9, 9?, 9?) constituting each a secondary of a common transformer (3a, 3b et 3c).

Abstract: A false wall includes a stretched piece of fabric held on the periphery thereof by an edge attachable to ribbands fixed to the ceiling or walls of a building. The ribbands include a holding arrangement having two interspaced parallel wings, namely a first external large wing and a second, lower, internal wing that ends in a shoulder extending towards the first wing and ending at a distance there from that enables the edge to be guided through, to rest on the shoulder. The ribband includes a base and two holding arrangements provided with inclined wings that converge towards each other and the space between the ends thereof is such that the distance between the end of a large wing and the plane of the large wing of the holding arrangement opposite is equal to the distance separating the shoulder of the holding arrangement from the large wing associated therewith.

Abstract: The invention relates to a method of producing a winding (1), e.g. for an electrical transformer, from a cylindrical, tubular metal element having a straight polygonal section. The inventive method is characterized in that it comprises the following steps consisting in: machining a series of essentially-parallel cuts through all of the sides (1a, 1c, 1d) of the tubular element excluding one last side (1b), said step being performed in a first series of passes; and, in a second series of passes, machining cuts in the aforementioned last side (1b) in order to form a junction with the cuts in the adjoining sides, such that said cuts are continuous and form a single helicoidal groove.

Abstract: A false wall includes a stretched piece of fabric held on the periphery thereof by an edge attachable to ribbands fixed to the ceiling or walls of a building. The ribbands include a holding arrangement having two interspaced parallel wings, namely a first external large wing and a second, lower, internal wing that ends in a shoulder extending towards the first wing and ending at a distance there from that enables the edge to be guided through, to rest on the shoulder. The ribband includes a base and two holding arrangements provided with inclined wings that converge towards each other and the space between the ends thereof is such that the distance between the end of a large wing and the plane of the large wing of the holding arrangement opposite is equal to the distance separating the shoulder of the holding arrangement from the large wing associated therewith.

Abstract: A longitudinal flexible heating mat includes a thin conductive metal strip (3) which is intended to be supplied with electric current at the ends (C, D) thereof and which is trapped between two flexible, insulating sheets (1, 1?) . The conductive strip includes at least two elements (3a, 3b) which extend from one of the longitudinal ends (A) of the mat to the other longitudinal end (B) of same. The first ends (C, D) of the aforementioned elements are intended to be connected to respective electric power terminals, and the second ends (D, E) of the elements are free and intended to be connected to one another using connection members (7). The invention also relates to a method of producing one such mat.

Abstract: A suspended ceiling includes at least one canvas (4) which is tightened at the periphery thereof to support elements (1) that are fixed to the ceiling and/or walls of a room. The inventive suspended ceiling is characterized by the fact that it also includes ceiling tiles (5) which are held by the support elements with the aid of holding members that allow the tiles (5) to be dismounted without first having to fully or partially dismount the canvas (4).

Abstract: The invention relates to a device to guarantee the tension and free access to the reverse face of a stretched canvas (3) on support means (5a, 5b) embodying a lining element (1) and particularly a wall or ceiling element. Said device is characterized in comprising at least one automatic closure (6), of the zipper type, which extends along at least a part of one of the dimensions of said wall.

Abstract: A structural profiled section, in particular for partitions, has cross-with two parallel U-shaped parts designed to receive the partition panels. The inner branches of the U-shaped parts are assembled by a transverse junction element arranged at a short distance from their respective bases.

Abstract: The invention concerns a structural profiled section, in particular for partitions. Said profiled section is characterized in that its cross-section comprises two parallel U-shaped parts, designed to receive the partition (14) panels, and the inner branches of the U-shaped parts are assembled by a transverse junction element (5) arranged at short distance from their respective bases (3c).