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:
Mar. 04, 1980
Filed:
Dec. 05, 1977
Applicant:
Inventor:
David Cowell, Webster, NY (US);
Assignee:
Sybron Corporation, Rochester, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05G / ;
U.S. Cl.
CPC ...
250402 ; 250408 ;
Abstract
A circuit for use with a X-ray tube applies filament power to preheat the tube prior to the application of high voltage. The preheat duration is made to be in inverse relation to the line voltage. The desired result is when the tube starts to conduct the tube current and tube voltage is held within acceptable limits regardless of line voltage variations.