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:
Sep. 30, 2008
Filed:
Sep. 12, 2005
Koji Kawai, Hamamatsu, JP;
Koji Kawai, Hamamatsu, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
An indirectly heated cathode Ccomprises a heatera double coila mesh memberand a metal oxideAn electrical insulating layeris formed on the surface of heaterHeateris inserted into and positioned at the inner side of double coilMesh memberis disposed along the length direction of double coilat the outer side of double coilDouble coilis grounded by being connected to the ground terminal of heatervia a lead rodMetal oxideis held by double coiland disposed to be in contact with mesh memberMetal oxideand mesh memberare exposed to the outer side of indirectly heated electrode Cso that the surface of metal oxideand the surface of mesh membermake up a discharge surface and mesh memberis in contact with the surface part of metal oxide