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:
Sep. 22, 1992
Filed:
Jan. 30, 1989
Willem Van der Hoeck, Eindhoven, NL;
Piet C Van Rens, Eindhoven, NL;
Johannes A Rebergen, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
In an electron tube having a glass envelope portion (1) is an electrode system (3) which is slid in the envelope portion (1) and is centered with respect to the wall (7) of the envelope portion (1) by means of a number of pretensioned springs (6). The springs (6) each extend from a supporting point B, which is fixed with respect to the electrode system (3), over their effective spring length toward the wall (7) of the envelope portion (1) and press against the wall (7) at a contact point A. A stick-slip movement of the springs over the surface of the wall (7) during the sliding movement of the electrode system (3) is avoided because the springs (6) each extend over their effective spring length along a straight line between supporting point B and contact point A. Flowing of the springs and the resulting occurrence of glass damage to the wall (7) is minimized by this spring configuration.