Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1988-09-09
1990-02-20
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335213, H01F 700
Patent
active
049029940
ABSTRACT:
A deflector for a cathode ray tube (called herein "CRT"), and more particularly a stator type deflector in which a plurality of slots for windings are formed in the inner surface of a tubular core and deflecting coils are positioned in these slots. Both convergence (spot) distortion and raster (pin cushion) distortion are small. The magnetic field distribution at the neck is a barrel type, and that at the screen is a pin cushion type. Both the horizontal and the vertical magnetic fields are obtained by adjusting the positioning of the winding slots formed in the inner surface of the tubular core for positioning the deflecting coils. This is accomplished by adjusting the angles of the plurality of winding slots formed in the inner surface of the tubular core which contain the deflecting coils.
REFERENCES:
patent: 3808568 (1974-04-01), Sawyer
patent: 3895379 (1975-07-01), Logan et al.
patent: 4081773 (1978-03-01), Nitzsche
patent: 4471261 (1984-09-01), Meier et al.
patent: 4754248 (1988-06-01), Belich
NHK Technical Journal, vol. 17, No. 6, 1965, pp. 367-415.
Philips Tech. Rev., 39, No. 6/7, pp. 154-171; "The Deflection Coil of the 30AX Colour-Picture System", by W. A. L. Heijnemans et al.
Harris George
International Business Machines - Corporation
Schechter Marc D.
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