Patent ID: 7098656

Claim:
Magnetic-inductive device for the control of ferromagnetic reticles, composed of a U-shaped box ( 1 ) in transversal section, which is the base and sides of the device itself, several magnets ( 4 ) made with long-lasting high-stability materials, several measuring coils ( 5 ), at least one multiple signal power point placed externally to the box ( 1 ) and one stirrup for its fixing to the device; said device is characterized by the fact of moreover comprising: at least two guiding plates ( 2 ) for the magnets ( 4 ); each of said at least two guiding plates ( 2 ) develops orthogonally to the device along each box ( 1 ) end and is fixed to the opposite two sides of the box ( 1 ) itself; two L-shaped rolled sections ( 3 ), each developping orthogonally to the device along each box ( 1 ) end and both fixed to one of said at least two guiding plates ( 2 ); said rolled sections ( 3 ) constitute the magnets pole pieces ( 4 ); several said magnets ( 4 ), the ends of which are held in the right position by holes made in said at least two guiding plates ( 2 ); the inductor is composed of the polar pieces and the permanent magnets ( 4 ), which are placed on one or more parallel planes of a ferromagnetic insert to be tested; each magnet ( 4 ) is placed parallel to the ferromagnetic insert ( 8 ) sliding direction with respect to the device itself; vice versa, when the device is to slide on the insert ( 8 ), it is possible to confirm that each magnet ( 4 ) is placed parallel to the device sliding direction on the insert ( 8 ); several coils ( 5 ) placed in a housing ( 6 ) which is U-shaped in its transversal section; said coils ( 5 ) are placed between the magnets ( 4 ) and the ferromagnetic insert ( 8 ) at the centre of the device; each coil ( 5 ) is autonomously connected to said multiple signal power point; the signals recorded by the measuring coils ( 5 ) are transmitted to a software, producing a diagram that underlines the position and the extent of any damage found in the ferromagnetic insert ( 8 ); a covering plate ( 7 ) fixed to box ( 1 ) so that it occupies the device side facing the ferromagnetic insert ( 8 ) to be examined; simple gears which enable the coils ( 5 ) to rotate parallel, in following times, along all directions in which the insert ( 8 ) metal layers are directed.