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:
Mar. 29, 1994
Filed:
Dec. 16, 1992
Kiyoshi Numata, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A cathode ray tube device employed in a projection apparatus for projecting an image on a screen. The cathode ray tube device includes a supporting frame mounted on a rim of a front panel section of the cathode ray tube, a lens plate in the form of a frame having a center aperture, and having a projection lens system attached to it, and a positioning supporting member detachably mounted on a mounting base plate of the projection apparatus and adapted for positioning the supporting frame and the lens plate with respect to the mounting base plate for detachably supporting the supporting frame and the lens plate by the mounting base plate. The positioning supporting member has a lens plate supporting surface for supporting the lens plate at a tilt angle corresponding to a convergence angle with respect to the mounting base plate and a supporting frame supporting surface for positioning and supporting the supporting frame at a tilt angle corresponding to an elevation with respect to the lens plate and at a distance corresponding to a back focal length at back of the lens plate for accurately setting the convergence angle, elevation and the back focal length.