Other

Brevetix

Scherrer, Jean-marc

Scherrer, Jean-paul

Sherrer, Jean-marc

Jean-Claude Beisser

Jean-Marc Scherrer

Jean-Paul Scherrer

Jean-Marc Sherrer

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.

Transformer winding and production method thereof

An installation for heating grounds, in particular sports grounds, using cables () 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 (), and each sector is heated by at least two heating lines (&#x2033;) constituting each a secondary of a common transformer (et).

Device for heating grounds, in particular sports ground

Growing community of inventors

L'Argentière la Bessée, France

Jean-Claude Beisser