US 5,204,751 A · Target support for projection cathode ray tube

Abstract

An improved target assembly for a projection cathode ray tube is provided wherein the target member is protected from being inadvertently tilted, and thus the tube defocused when subjected to shock loading. The target member is supported by a shaft screw, which in turn is mounted on an adjustment pad for initially tilting the target member to focus the image. The positive locking elements includes external threads on the shaft screw received by inside threads of a center aperture in the adjustment pad. A locking nut is utilized to jam the shaft screw against the pad, and thereby load the cooperating threads. In addition, a threaded mounting stud of the target member engages internal threads of the shaft screw at the opposite end, and a locking set screw inside the shaft engages these internal threads and is tightened against the stud to load these threads.

Claims10

Dependent claims

A target assembly for a projection cathode ray tube having a face plate comprising:

a target member having an electron beam sensitive coating for forming an image when excited by an electron beam;
a shaft screw for supporting said target member in spatial relationship in said tube;
mounting means for said shaft screw adapted to engage said face plate;
said mounting means including an adjustment pad for tilting said target member to focus the image of said projection tube;
and
positive locking means for said mounting means to secure said target member in said spatial relationship spaced from said face plate to secure the focus;
whereby said target member is protected from being inadvertently tilted and the tube being defocused when subjected to shock loading.

4 more elements

Dependencies are inferred from the claim text.

Target support for projection cathode ray tube

Life of this patent

Target support for projection cathode ray tube

Life of this patent

Abstract

Claims10