Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1993-08-23
1994-12-13
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
313440, 313343, 348829, 29605, 140 715, H01H 100, H01J 115, H01J 2970, H04N 5645
Patent
active
053732740
ABSTRACT:
A deflection yoke for use with cathode ray tubes of the type in which one or more electron beams generated therein are deflected includes a magnetic core member and a selected wire winding thereon to produce a magnetic field for deflecting the beam. Each core has a winding axis defined thereon and each winding occurs along at least one segment having a given length along the winding axis. Each segment has a first end and an opposed second end and a middle portion defined therebetween. The winding pattern of each winding in accordance with the invention begins in the central portion of each segment and includes a first toroidal winding portion starting at this midpoint and extending in a first handed direction to a first segment end. The winding pattern includes an intermediate transition portion which extends from the first segment end to the second segment end. The winding pattern continues with a second toroidal winding portion extending from the second segment and to the middle starting point. It has now been discovered that by providing a conductive wire winding on the ferrite core which follows a helical path about a winding axis along the core, and which follows a winding pattern beginning in the middle portion of each winding segment and which is laid up to intentionally include certain wire crossovers, an improved CRT display raster characterized by reduced distortion and reduced ringing is provided.
REFERENCES:
patent: 4754248 (1988-06-01), Belica
Babula Thomas J.
Belica Roddy
Academy Electronic Tube, Incorporated
Picard Leo P.
Ryan Stephen T.
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