Patent ID: 8789410

Claim:
A device for checking a tire reinforcing thread made of a magnetic material and having a determined diameter comprising: at least one induction member that induces a magnetic flux in the thread that is to be checked; a support made of magnetic material supporting the induction member, the support having the overall shape of a U and comprising first and second legs that conduct the magnetic flux into the thread for checking, the ends for conducting the magnetic flux into the thread for checking of the first and second legs defining a direction of alignment of the device; and at least one receiver member that receives the magnetic flux flowing through the thread for checking between the first and second legs; wherein the dimensions of the receiver member are arranged so as to measure only the magnetic flux flowing through the thread for checking when, in operation, the direction of alignment of the device is substantially parallel to the direction in which the thread for checking runs, and wherein the receiver member comprises a core around which is arranged a receiver coil that receives the magnetic flux flowing through the thread for checking, and is movable and comprises means for keeping the core in contact with a radially internal surface of the tire.