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. 27, 1982
Filed:
Mar. 19, 1979
Applicant:
Inventors:
Carl W Penird, Waterloo, NY (US);
Peter G Puhak, Seneca Falls, NY (US);
Assignee:
North American Philips Consumer Electronics Corp., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313407 ;
Abstract
A shadow mask for color cathode ray tubes has increased resistance to doming caused by heat generated within the tube during operation. A plurality of spaced protuberances formed on the mask frame provide the welding locations for the mask itself and thus provide a space between the frame wall and the mask wall. This reduces the stresses normally introduced into the mask when it is welded to the frame and reduces the tendency to dome during heating.