Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1978-09-18
1981-01-20
Braun, Fred L.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335210, 335213, H01F 100, H01F 700
Patent
active
042465605
ABSTRACT:
A deflection yoke for use with a picture tube of a television receiver. A vertical deflection coil of the deflection coil has a larger winding angle on an electron gun side thereof than on a screen side thereof. A magnetic material piece is disposed inside the vertical deflection coil so that a vertical deflection magnetic field is formed into a strong barrel magnetic field on the electron gun side. As a result, a raster scanned on a faceplate of the picture tube is free from misconvergence and pincushion distortion. A core of the deflection yoke has sawtooth-shaped end surfaces, or auxiliary rings having sawtooth-shaped end surfaces are disposed on the end surfaces of the core. As a result, a wire of the vertical deflection coil is prevented from slipping on the end surfaces of the core although the wire of the vertical deflection coil is wound at a large winding angle on the electron gun side.
REFERENCES:
patent: 2704816 (1955-03-01), Fernsler
patent: 3098943 (1963-07-01), Reiches
patent: 3711802 (1973-01-01), Torsch
patent: 3757262 (1973-09-01), Over et al.
patent: 4117432 (1978-09-01), Shizu
patent: 4143345 (1979-03-01), Barkow
Maruyama Takesuke
Matsumoto Shuzo
Shimizu Toshiharu
Takeyama Atushi
Yamashita Kei
Braun Fred L.
Hitachi , Ltd.
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