Self-converging deflection yoke and winding method and apparatus therefor

Abstract

A self-converging deflection yoke for use with a color television kinescope provides both coma and side pincushion distortion correction through the use of double bias vertical deflection coils. The vertical coils are toroidally wound about a magnetically permeable core. A winding frame insert located within the interior of the core allows the coils to follow the desired double bias or diamond configuration. The core insert comprises a ring-shaped base adjacent to the core. Removable wire guide members are spaced away from the base to form channels between the guide members and the base. These channels receive the wires during windings and act to define the shape of the coils. After the coils are wound, the guide members are removed, allowing the yoke to be assembled.