Tektronix, Inc.

Myron A Bostwick, Jr

Bozidar Janko

Aris Silzars

Keith F Kongslie

William H Tomison

Norman R Franzen

H Lee Van Nice

A hollow enclosure has first and second ceramic walls interconnected and hermetically sealed by first and second compact coupling assemblies. In one form, each coupling assembly includes a first flange portion, a web portion and second flange portion. The first flange portion of the first coupling assembly is fritted to a first annular edge of the first ceramic wall. The first flange portion of the second coupling assembly is fritted to a second annular edge of the second wall. The second flanges of the coupling assemblies are then placed against one another and laser welded, without the need for thermal clamps.

Method and apparatus for interconnecting and hermetically sealing

A post-deflection accelerating and scan expansion lens system (10) is disclosed which may be used in a cathde ray tube (12). The lens system comprises an accelerating and scan expansion lens (70) of the quadrupole type including a pair of coaxial cylindrical electrodes (72, 74) and first and second compensating lenses (66, 78) on opposite ends thereof to provide a bright image of the desired size in sharp focus and great detail on a fluorescent screen in such tube. The first compensating lens (66) is supported adjacent the input of the accelerating and scan expansion lens to provide a linear magnification of the amount of electron beam deflection produced by the vertical and horizontal deflection plates (46, 48 and 50, 52). The second compensating lens (78) includes a single electrode having an aperture (79) with opposed notches (122, 124) in the edge of the aperture on opposite sides of the electron beam axis (28) and is positioned adjacent the output of the accelerating and scan expansion lens to provide corrected geometry of the image displayed on the fluorescent screen.

Accelerating and scan expansion electron lens means for a cathode ray

An electron beam deflection structure for a high frequency cathode-ray tube incorporates a meanderline slow wave circuit that is supported directly by the same glass rods used to support other portions of the CRT's beam forming and deflection system. To accomplish this, elongate loops that serially interconnect a plurality of deflection plate segments are bent away from the plane of the segments (and the beam axis) and joined by integral support strips to the rods. The elimination of a separate support structure for the deflectors greatly reduces manufacturing costs.

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Banks, OR, United States of America

Myron A Bostwick, Jr