H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/35.1201
H01J 31/02 (2006.01) H01J 29/70 (2006.01)
Patent
CA 1111485
STATIC CONVERGENCE DEVICE INCLUDING MAGNETIC CORRECTOR APPARATUS Abstract Of The Invention A static convergence device for statically converging first and second electron beams within an envelope of a cathode ray tube comprises an adjustable first magnetic apparatus, adjustment of which moves at least one of the electron beams in a direction and with a magnitude of motion to converge them to within a first distance of each other for selected conditions of mis- convergence. The apparatus produces a motion of minimum magnitude of at least one of the electron beams for all adjustments of its magnetic field. The apparatus is unable to converge the electron beams to within the first distance for all of the various conditions of misconvergence. The static convergence device also includes adjustable magnetic corrector apparatus suitable for locating about a portion of the envelope for producing a second magnetic field of fixed magnetic field strength and adjustable direction for effecting motion of a substantially fixed magnitude of at least one of the electron beams in a direction that will offset the motion of minimum magnitude produced by the first magnetic apparatus for enabling the first magnetic apparatus to converge the electron beams to within the first distance for all of the various conditions of misconvergence.
301272
Morneau Roland L.
Rca Corporation
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