Cathode ray tube having an fe-co-cr shadow mask and method...

Details Cathode ray tube having an fe-co-cr shadow mask and method... Cathode ray tube having an fe-co-cr shadow mask and method...

H - Electricity

01

J

316/12, 313/35.1

H01J 29/07 (2006.01) H01J 9/02 (2006.01) H01J 9/14 (2006.01) H01J 29/81 (2006.01)

Patent

CA 1208686

ABSTRACT: "Cathode-ray tube having an Fe-Co-Cr shadow mask and method of manufacturing such a shadow mask." A cathode ray tube of the post-focusing type comprising colour selection means in the form of a ferro- magnetic plate having a large number of apertures. The plate is magnetized so that a magnetic quadrupole lens is formed in each aperture. The ferromagnetic plate con- sists of an Fe-Co-Cr alloy having 25 - 27% by weight of Co and the remainder essentially Fe.

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