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:
Jul. 10, 1990
Filed:
Nov. 06, 1987
Applicant:
Inventors:
Guiseppe Giannantonio, Anagni, IT;
Cesare de Paolis, Valmontone, IT;
Assignee:
Videocolor, Montrouge, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01F / ; H04N / ;
U.S. Cl.
CPC ...
315-8 ; 361150 ;
Abstract
To improve the trichromatic cathode tube shielding effect given by the frame-mask set and by a shielding material made with material of low magnetic permeability, the external conductors of a de-magnetization coil with two loops are made to pass in front of the fastening lugs and not behind the frit plane as was the case before, and the position of the internal conductors is set to obtain the best compromise.