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:
Jul. 30, 2013
Filed:
Jul. 02, 2010
Gwenael Lemarchand, Limours, FR;
Frederic Dahan, Le Chesnay, FR;
Christelle Gaudin, St. Maurice, FR;
Gwenael Lemarchand, Limours, FR;
Frederic Dahan, Le Chesnay, FR;
Christelle Gaudin, St. Maurice, FR;
General Electric Company, Schenectady, NY (US);
Abstract
A method for controlling emission of a beam of electrons in an X-ray imaging tube. The X-ray imaging tube has an anode and a cathode. The method comprises a step in which at least one emission device included in the cathode emits an accelerated incident beam of electrons onto an impact focal spot on the anode to generate X-rays. An emission device is associated firstly with an assembly of polarizing plates and secondly with a focusing cup. An electric generator simultaneously applies a beam focusing voltage to the assembly and/or to the cup to control a characteristic dimension of the focal spot, and a cut-off voltage to the cup to control the emission of the beam by the device. The invention also concerns a corresponding cathode, tube and imaging system.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile