Apparatus for magnetizing a convergence device for in-line color-picture tubes and methods of adjusting convergence with such apparatus
AssigneeInternational Standard Electric Corporation
InventorsErhard Kienle, Walter Kornaker, Felix Greiner
Life of this patent
Estimating the term…
Abstract
An apparatus is disclosed for magnetizing the convergence device of a color-picture tube including electrically excitable coils disposed around the tube neck and having their axes located in the convergence device plane. The cross sections of the coils in the convergence-device plane are greater than those perpendicular to this plane. This adaptation of the symmetry of the magnetizing coils to the symmetry of the convergence device makes it possible to exert a strong influence on the convergence device.
Claims11
Apparatus for magnetizing the permanent-magnet convergence device of an in-line color-picture tube, wherein permanent magnets located around the neck of the tube in a plane perpendicular to the tube axis, hereinafter referred to as "convergence-device plane", are magnetized or remagnetized, by which magnetization the electron beams in the tube are deflected relative to each other in different directions until they converge, said apparatus comprising:
- electrically excitable coils mounted around the neck of the tube having their magnetic axes located in the convergence-device plane, said coils having cross sectional dimensions in the convergence-device plane greater than the dimensions perpendicular thereto, and coil axes lying in the convergence-device plane.
Dependencies are inferred from the claim text.