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:
Dec. 26, 1978
Filed:
May. 20, 1977
Applicant:
Inventor:
Tom W Branton, Lancaster, PA (US);
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313403 ; 29 2517 ;
Abstract
A shadow mask electrode for a line screen cathode ray tube comprises a formed metal sheet having an array of slot-like apertures therein. The apertures are disposed in parallel rows with the apertures elongated in the direction of the rows and separated from adjacent apertures in the same row by webs. An array of discrete surface cavities are provided as holes etched part way through the thickness of the mask. Each cavity is smaller than an aperture of the mask, is laterally spaced from the center-line of an aperture row opposite a web, and extends slightly into the web.