Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Electron or ion beam deflecting type
Patent
1984-02-23
1985-01-08
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Electron or ion beam deflecting type
335210, H01F 502
Patent
active
044929439
ABSTRACT:
An electromagnetic deflection unit is disposed around a portion of a display tube and comprises a first deflection coil for producing, when energized, a frame deflection field and a second deflection coil for producing, when energized, a line deflection field the second deflection coil and being located coaxially within the first deflection coil, each deflection coil having two diametrically oppositely located deflection coil units. The first deflection coil has a winding distribution for generating, upon energization, a dipole deflection field in combination with a positive sixpole deflection field on the side of the gun system, generating a dipole field in combination with a negative sixpole field in the central area, and generating a dipole field in combination with a positive sixpole on the side facing the display screen, the first and the second deflection coils being positioned axially with respect to each other in such manner that upon energization the magnetic field generated by the first deflection coil extends further towards the display screen than the magnetic field generated by the second deflection coil so that the device shows a minimum east-west raster error.
REFERENCES:
patent: 4096462 (1978-06-01), Akatsu et al.
patent: 4122422 (1978-10-01), Hasegawa et al.
patent: 4229720 (1980-10-01), Heijnemans et al.
patent: 4257024 (1981-03-01), Shimoma et al.
patent: 4409578 (1983-10-01), Beelaard et al.
Sluyterman Albertus A. S.
Vink Nicolaas G.
Briody Thomas A.
Harris George
Rich Marianne
Streeter William J.
U.S. Philips Corporation
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