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:
Oct. 31, 1989
Filed:
Mar. 13, 1989
Applicant:
Inventors:
Dirk van Houwelingen, Heerlen, NL;
Jozephus J Warringa, Heerlen, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
313592 ; 313294 ; 313308 ;
Abstract
An electron tube, for example, a transmitter tube of the triode type, comprising in an evacuated envelope a mesh or cage cathode (3) and an anode (1). By providing a control electrode (4) near the cathode (3) on the side thereof remote from the anode (1), the output power of the tube can be controlled by means of a potential difference between the control electrode (4) and the cathode (3).