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:
Apr. 13, 2010
Filed:
Oct. 24, 2007
Nagisa Kuwahara, Tochigi, JP;
Takeshi Ishii, Tochigi, JP;
Masayuki Aiga, Hyogo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In the magnetron, an upper end hatA is used as a composing element of a cathode structure memberA and includes a portionAa which is in contact with one end portionof a filament coil. The thickness of the portionAa is reduced, whereby the portionAa is held not in contact with a center lead. Owing to this, heat generated in the filament coilcan travel to the upper end hatA without traveling directly to the center lead. Therefore, even when the quantity of input power is reduced to such a degree as to be able to reduce noise, or even when the electron radiation area of the filament coilis reduced, the getter effect can be displayed fully. As a result of this, noise reduction and cost reduction can be realized at the same time.