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:
Aug. 12, 1980
Filed:
Dec. 21, 1977
Leonard Dietch, Skokie, IL (US);
James W Schwartz, Deerfield, IL (US);
Zenith Radio Corporation, Glenview, IL (US);
Abstract
This disclosure depicts a television picture tube subject to an undesired build-up of localized high-potential static charges and high-potential charge retention. The tube is characterized by a resistive coating deposited on at least one of the normally uncoated outer areas of the tube and in contact with the conductive coating to disperse any static charges by means of a flow of electrons through the resistive coating. The 'rush' of electrons which may cause an annoying crackling sound upon tube turn-on and turn-off is attenuated thereby to suppress the sound, and any residual high-potential charges remaining after turn-off are discharged to ground.