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:
Nov. 01, 2005
Filed:
Mar. 31, 2004
Josef Deuringer, Herzogenaurach, DE;
Jörg Freudenberger, Baiersdorf, DE;
Peter Schardt, Höchstadt, DE;
Markus Schild, Herzogenaurach, DE;
Josef Deuringer, Herzogenaurach, DE;
Jörg Freudenberger, Baiersdorf, DE;
Peter Schardt, Höchstadt, DE;
Markus Schild, Herzogenaurach, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
In a method to detect the pressure in an x-ray tube having a cathode of the x-ray tube that is heated with a heater current, and wherein electrons are accelerated between the cathode and an anode by an applied x-ray tube voltage, the heater current is measured, a tube current corresponding to the tube -ray voltage is measured, the difference between the measured heater current and the measured tube current is determined or the temporal change of the measured heater current or of the measured tube current is determined, the difference or the temporal change is compared with predetermined calibration values, and a value representing the pressure in the x-ray tube is determined from the comparison.