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. 20, 1990
Filed:
Mar. 31, 1988
George A Doumani, No. Andover, MA (US);
Victor M Samarov, Carlisle, MA (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
An enclosure for a video-amplifier printed wiring board (PWB) located in close proximity to, and substantially structurally separated from the cathode ray tube (CRT) connector base in a video display terminal (VDT). The enclosure combines the functions of a structural support for the board on the VDT chassis, of an EMI/RFI shield for the board, and of an expanded heat transfer-surface heatsink. The enclosure comprises a one-piece casting with a cavity formed by a bottom wall, side walls adjacent to the bottom wall, and an open side opposite to the bottom wall. It further has integral mounting features to locate and structurally support the board in the cavity with the high heat-dissipation components facing the inner surface of the cavity's bottom wall. The outer surface of the bottom wall is provided with integral, heat-dissipating fins to form an expanded heat-transfer surface heatsink. The bottom wall has a substantially circular opening through which the CRT connector base protrudes into close proximity with the video board, being connected thereto by flexible electrical wires transmitting substantially no mechanical load to the CRT base. The cavity is covered at the open side with an electrically conductive cover to complete the EMI/RFI shield around the video board, the cover preferably being part of the VDT chassis, thus also providing structural support to the enclosure.