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:
Apr. 08, 1980
Filed:
Sep. 28, 1978
Applicant:
Inventors:
Jacob Koorneef, Eindhoven, NL;
Antonius J Der Kinderen, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313403 ; 29 2517 ; 313408 ;
Abstract
A color display tube having a quadrupole post-focusing electrode consisting of two crossing sets of parallel conductors, the first set of conductors consisting of wires and the second set of conductors consisting of metal stripes secured pairwise against each other and clamping the wires at the crossings, said wires being surrounded coaxially at the area of the crossings by a layer of insulation material, has the advantage that already at a comparatively low focusing voltage between the sets of conductors a sufficiently strong focusing influence is exerted on the electron beams.