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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.:

US 4374342 B1

PDFFull Text
Date of Patent:
Feb. 15, 1983

Filed:

Oct. 15, 1980

Focusing means in a unitized bi-potential crt electron gun assembly

Applicant:
Inventor:

Donald L Say, Waterloo, NY (US);

Assignee:

North American Philips Consumer Electronics Corp., New York, NY (US);

Attorneys:

Briody; Thomas A.

Oisher; Jack

Fox; John C.

Primary Examiner:

Palmer C Demeo

Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313414 ;
Abstract

A structural beam focusing improvement is introduced into the main focusing electrode of at least one of the gun structures in a CRT plural beam bi-potential in-line electron gun assembly. This improvement, being in the form of a pair of sideboard elements, one of which is positioned on either side of a forward aperture in the unitized main focusing electrode, imparts correctional influences to asymmetries in the respective lensing field, thereby resulting in the achievement of a desired circular beam spot landing at the center of the screen.

Find Patent Forward Citations

Say, Donald. (1983). Focusing means in a unitized bi-potential crt electron gun assembly (U.S. Patent No. 4374342). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4374342

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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