Abstract: Thermal insulation screen transparent to magnetic flux, intended to isolate an electromagnetic inductor with a transverse or pseudo-transverse field, from the radiation of a heated product (1), the thermal screen being made up of a matrix of blocks (7) made of a thermally insulating material and of a plurality of tubes (8) cooled by the circulation of a fluid, these tubes being imprisoned in said matrix of blocks and the tubes and the blocks being held in place by a support. The screen includes, behind the blocks, heat-conducting means (10) placed so as to intercept the heat flux passing through the blocks, these conducting means being thermally coupled to the cooled tubes (8) for discharging the heat flux into the tubes.

Abstract: Gastight and vacuum-tight chamber intended to be used in a device for heating a product advancing inside the chamber by electromagnetic induction, characterized in that it comprises a gastight and vacuum-tight sheath made of an electrically insulating, gastight and vacuum-tight material, the inner faces of the sheath being protected by a heat shield consisting of a matrix of tiles made of a thermally insulating material and of a plurality of tubes cooled by the flow of a fluid, the latter being trapped in the matrix of tiles.

Abstract: Gastight and vacuum-tight chamber intended to be used in a device for heating a product advancing inside the said chamber by electromagnetic induction, characterized in that it comprises a sheath made of an electrically insulating, gastight and vacuum-tight material, the inner faces of the said sheath being protected by a heat shield consisting of a matrix of tiles made of a thermally insulating material and of a plurality of tubes cooled by the flow of a fluid, the latter being trapped in the said matrix of tiles.

Abstract: A heating device for the electromagnetic induction heating of a metal strip traveling in a specified direction. The device includes at least one electric coil arranged opposite at least one of the large surfaces of the strip so as to heat the latter by transverse magnetic flux induction, each coil being associated with at least one magnetic circuit. Each circuit is divided into a plurality of magnetically independent bars arranged parallel to the direction of travel of the strip. The bars may moved toward or away one another thereby adapting to the width of the strip and distributing the magnetic flux across the width of the strip.

Abstract: Device for the electromagnetic induction heating of a metal strip travelling in a specified direction comprising at least one electric coil arranged opposite at least one of the large faces of the said strip so as to heat the latter by transverse magnetic flux induction, each coil being associated with at least one magnetic circuit, each circuit being divided into a plurality of mutually uncoupled magnetic bars arranged parallel to the direction of travel of the strip, the said magnetic circuit, consisting of the said plurality of mutually independent bars, adapts to the width of the strip to be heated by moving the said bars away from or towards one another, in such a way as to continuously adapt the distribution of the said magnetic flux to the characteristic dimensions of the said strip.

Abstract: A device achieves thermal protection and cooling of the poles of an electromagnetic inductor, in particular for an induction furnace. The furnace comprises a plurality of tubes, arranged side by side and substantially coplanar, through which a coolant fluid flows. The connection of the tubes to the inlet and outlet pipes for the coolant fluid is made by a combination of socket and O-rings designed to ensure both electrical discontinuity and leaktightness between each tube and the pipes.

Abstract: Electromagnetic-induction heating coil, especially for the heating of metallurgical products, in which coil conductors are cooled with the aid of a tube in which a cooling fluid, in thermal contact with the conductors, circulates, wherein the conductors are wound in at least one ply, as a helix around the cooling tube so that the ply has at least one twist of one complete turn between two electrical terminals of the coil.

Abstract: Device for the induction heating of flat metallic products on the move with the aid of electrical coils provided on magnetic armatures arranged on either side of the large faces of the product to be heated, which moves continuously between the said coils, wherein the inductors are mechanically independent of each other and they are arranged symmetrically in relation to the median plane of the product so that the magnetic fields generated are in phase opposition, leading to a ring-like distribution of the currents induced in the product to be heated up.

Abstract: Mobile modules for electromagnetic-induction heating or reheating a flat metallurgical product on the move, wherein each of the said modules is mounted so as to move on a track perpendicular to the direction of movement of the product. Each module includes an on-board counterweight, the potential energy of which may, at any instant, be used to quickly remove the module from the product.

Abstract: A cooling tube (T) is incorporated into each conductor (C1) of the coil. The current carried by this conductor is divided between the strands which are maintained in thermal contact with the tube even in transposition or twist areas in which the conductor undergoes particularly marked deformations. The conductor features at least one half-turn twist between the electrical terminals of the coil.

Abstract: The device for protecting the poles of an electromagnetic inductor comprises a heat exchanger formed by one or more co-planar metal tubes (6) designed to allow the circulation of a cooling fluid therein and of such an arrangement that there is at most one electrical junction between any two tubes or tube elements. The exchanger is fastened to a rigid electrically insulating support plate (5) coated with refractory concrete (10) and covers the entire polar surface as far as the cowls (3). The exchanger can be shaped in the form of a series of alternating hairpins or in the form of a spiral with one or more branches. The device serves especially for protecting the poles of inductors used for the induction heating of metal products.

Abstract: The rollers (2) carrying a steel strip (1) to be heated between two rolling mill procedures are mainly constituted by a lamination of magnetic sheet metal plates to channel the variable magnetic flux generated by inductors which consist of magnetic circuits (4) and field coils (5), and so that the rollers are not heated up by this flux.