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. 09, 2005
Filed:
Jul. 19, 2001
Tomohiro Ishizu, Hamamatsu, JP;
Tetsuya Fujita, Hamamatsu, JP;
Tomohiro Ishizu, Hamamatsu, JP;
Tetsuya Fujita, Hamamatsu, JP;
Hamamatsu Photonics K.K., Hamamatsu, JP;
Abstract
A photomultiplier that prevents rattling between the dynodes and the base plates, the parts being fixed securely to achieve excellent vibration resistance. The dynode of the second stage (Dy) includes a curved surface (DyA) having an arcuate cross-section and a flat surface (DyB) formed continuously and flush with the curved surface. The curved surface (DyA) and flat surface (DyB) make up the secondary electron emitting surface. Side walls (DyC) erected from the curved surface (DyA) are formed through a pressing process on either lengthwise end of the curved surface (DyA). First ear portions (DyD) extend outward from both side walls (DyC). Second ear portions (DyE) extend outward from both lengthwise ends of the flat surface (DyB). The first and second ear portions (DyD and DyE) are not parallel to each other but form a fixed angle.