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. 18, 1978
Filed:
Oct. 26, 1976
Applicant:
Inventors:
Christopher Archibald LeMay, Osterley, GB;
Robert Paul Randall, Uxbridge, GB;
Assignee:
EMI Limited, Hayes, GB;
Primary Examiner:
Int. Cl.
CPC ...
H05G / ;
U.S. Cl.
CPC ...
250401 ; 250355 ;
Abstract
Radiographic apparatus is described in which an X-ray tube incorporates a cathode which is heavily driven to produce a strong electron beam. In order to minimize the demands placed on the cathode, the X-radiation emitted by the tube (or the electron beam produced by the cathode and causing the emission of the X-radiation) is monitored and used to control the supply of energy (e.g. heater current) to the cathode.