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:
Jun. 30, 1981
Filed:
Jul. 11, 1979
Johannes H van Roosmalen, Eindhoven, NL;
Gerardus A Vrijssen, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
In a cathode-ray tube, in particular a camera tube, the inner wall of the glass envelope is coated with an electrically conductive material interrupted in the proximity of electrodes extending transversely to the wall coating and supported by transversely extending supporting surfaces. At the area of each of the interruptions the envelope has a stepwise decrease of the inside diameter in two steps. In the direction of decreasing diameter the first of these steps constitutes the supporting surface for the transverse electrode and the interruption in the wall coating is provided on a wall portion of the second of these steps. The interruptions provided in this manner do not exert any disturbing influence on the electron beam in the tube.