Apparatus and method for cleaning shadow masks in color picture

Details Apparatus and method for cleaning shadow masks in color picture Apparatus and method for cleaning shadow masks in color picture

1980-09-30

1982-11-30

Ramsey, Kenneth J.

Electric lamp and discharge devices

With temperature modifier

For lead-in-seal or stem protection

313402, 313323, 316 28, H01J 900

Patent

active

043613705

ABSTRACT:
The present invention provides an improvement in shadow mask type color picture tubes. The improvement comprises a ferromagnetic member located within a tube and means for holding the ferromagnetic member within the tube. The invention also encompasses a method of utilizing the ferromagnetic member to remove particles from a shadow mask of a color picture tube. The method includes the use of a magnet to release the ferromagnetic member from the holding means and to move the ferromagnetic member over a surface of the shadow mask.

REFERENCES:
patent: 261234 (1882-07-01), Jameson
patent: 2667600 (1954-01-01), Goff
patent: 3912564 (1975-10-01), Rogers
patent: 3979633 (1976-09-01), Davis et al.
Technical Notes No. 1254 A publication of RCA, Princeton, N.J. Sep. 3, 1980.

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