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. 25, 1986
Filed:
Sep. 26, 1984
Shigeru Tanaka, Ootawara, JP;
Toshihiro Onodera, Kunitachi, JP;
Kabushiki Kaisha Toshiba, , JP;
Abstract
The dissipation of the filament power of an X-ray tube is controlled by a heating circuit including a voltage resonance type DC-to-DC converter and a filament current detector/controller. The DC-to-DC converter is comprised of a switch, a capacitor, a damper diode and a transformer. These circuit elements constitute a voltage resonance type switch. A DC voltage is interrupted and applied to the primary winding of the transformer. The AC voltage is induced to the secondary winding of the transformer, thereby heating the filament of the X-ray tube. In accordance with the load curve of the X-ray tube, the filament heating voltage can be controlled within a control range defined by the resonant conditions of the switch.