Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1978-06-06
1979-03-06
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335210, H01F 100
Patent
active
041433459
ABSTRACT:
A deflection yoke of the self-converging type utilizing pincushion-shaped horizontal and barrel-shaped vertical deflection fields for converging three in-line electron beams includes magnets disposed near the top and bottom beam exit end of the yoke and respectively poled to produce flux of the same polarity as the vertical deflection field at the top and bottom portions of the raster. A second pair of magnets disposed inside the flared inner surface of the yoke at the top and bottom approximately at the center of the yoke length are respectively poled for producing flux which is of the opposite polarity of the vertical deflection field at the top and bottom portions of the raster, the two pairs of magnets cooperating with the deflection field for correcting North-South pincushion distortion with substantially no effect on the beam convergence.
REFERENCES:
patent: 2730642 (1956-01-01), Grosejean
patent: 3899710 (1975-08-01), Machida et al.
patent: 4034324 (1977-07-01), Sano et al.
Harris George
Rasmussen Paul J.
RCA Corporation
Whitacre Eugene M.
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