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:
Aug. 08, 1978
Filed:
Jul. 20, 1976
Masaru Yamano, Hirakata, JP;
Toshio Iemura, Kyoto, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A core type magnetron comprising a vacuum envelope which includes an open ended magnetic anode cylindrical member and magnetic upper and lower end plates for closing the opposite end openings of the cylindrical member. Internal to the vacuum envelope, a plurality of anode vanes are provided which extend in a radial direction from the approximate middle of the inner wall of the cylindrical member toward the center of the envelope. A pair of permanent magnets provided internal to the envelope, each extending from opposite end plates toward the anode vanes. By this arrangement, an operating space is defined by the opposing surfaces of the pair of the magnets and the anode vanes, such that a magnetic flux is applied to said operating space. A cathode is provided within the operating space. The magnets employed are characterized as being low in the emission of gases during operation of the magnetron, since they are manufactured by a process which includes melting designated source materials mixed with a small amount of silicon in a vacuum, casting the melt in a vacuum, followed by forging.