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:
Feb. 12, 2013
Filed:
Feb. 03, 2010
Joerg Freudenberger, Kalchreuth, DE;
Joerg Freudenberger, Kalchreuth, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An x-ray tube has an anode and a thermionic emitter with multiple emitter regions spaced from one another that generate, between the emitter and the anode, an electron beam composed of multiple partial beams generated by the respective emitter regions. Between the emitter and the anode is at least one control electrode arrangement that generates a variable electrical field and that has a number of passages to control the respective partial beams. Thus control electrode arrangement has a number of control electrode layers. The individual emitter regions and the control electrodes are arranged and controlled relative to one another to cause substantially the entirety of each partial beam generated by the respective emitter regions to proceed through a passage respectively associated with that partial beam.