Abstract: A part which is attached to a support frame is pressed against a rotatable member mounted within that support frame. An element having four degrees of freedom is mounted between the support and a point on the part. A biasing element is mounted between the support and a second point on the part to urge the part against the movable member. The structure is useful in the recording of data on a magnetic recording machine and impactless magnetic printing machines.

Abstract: An arrangement for recording information on a magnetic record carrier, having at least one magnetic recording head which incorporates an electromagnet having a core, wherein said arrangement includes a magnetic shunt, said magnetic shunt and the magnetic core of the electromagnet being adapted to be arranged on either side of said record carrier and close thereto, so as to form a closed magnetic circuit in which the magnetic flux is substantially perpendicular to the surface of the carrier, the said core having a recording pole and a flux-closing pole and the cross-section of the recording pole being smaller than that of the flux-closing pole.