device for producing a rotating magnetic field in a level, especially on the magnetic alignment optically effective particles in an intermediate forms

摘要

The device produces a magnetic field which can rotate in a plane, in partic a cut off device for a drawing carrier with particles which align to a specific magnetic field direction has one of two magnetic cores (4, 6) of U-shaped profile directed to each side of the plane (2) with similar poles of the cores (4, 6) arranged above and below the plane (2). the first winding (8) of the transverse yoke of the first core (4) and the second winding (9) of the transverse yoke of the second core (6) can be connected in series to a primary current source. A third winding (16) at right angles to the first (8) and a fourth (20) at right angles to the second (9) are connected to a second current source.