The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 1982
Filed:
Sep. 30, 1980
Applicant:
Inventors:
Karl G Hernqvist, Princeton, NJ (US);
Donald C Pultorak, Trenton, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
316-2 ; 313402 ; 313323 ; 316 28 ;
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.