The invention relates to the production of a cable rotating head, which is
devoid of an abrasion ring, for a Czochralski-crystal drawing system
which is used to drive a drawing cord in an azimuthal and vertical manner
and the nucleus of a crystal is fixed therein. According to the
invention, the cord rotating head comprises a cord winding mechanism
which can be supported by a vertical hollow shaft, through which the
drawing cord is suspended in the crystal drawing system, and the cord
rotating head is rotationally mounted about the axis thereof and can be
offset by a rotation motor, which is secured to the crystal drawing
system, together with the cord winding mechanism and the drawing cord in
a rotational movement, and said vertical hollow shaft is surrounded in a
coaxial manner by a double toothed gear which is rotationally mounted
opposite to the hollow shaft and can be driven by a drawing motor which
is secured to the crystal drawing system. The double toothed gear can be
driven by a gear of the cord winding mechanism, such that the mechanical
drive energy of the drawing motor, which is secured in a stationary
manner to the crystal drawing system, can be transferred to the cord
winding mechanism which rotates in relation to the crystal drawing
system.