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:
Dec. 04, 1979
Filed:
Mar. 27, 1978
George R Hergenrother, Waltham, MA (US);
Peter J Sprague, Lenox, MA (US);
Advent Corporation, Cambridge, MA (US);
Abstract
A projection cathode ray tube has a target that is mechanically adjustable by means external to the evacuated envelope. The target extends into the evacuated space and is mounted upon a bellows that forms part of the envelope. The target is moved relative to other optical elements within the envelope by means extending through the bellows to provide both axial and pivotal adjustment after the tube is sealed. This structure enables other optical components including image reflectors to be constructed integrally with the envelope, and also improves heat transfer between the target and the external space, permitting control of the target temperature.