Inventors:
Kenneth S. Salyer - Lexington KY
Peter J. Czichon - Lexington KY
Assignee:
Hughes Display Products - Lexington KY
International Classification:
H04N 5645
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.