Cathode ray tube

Details Cathode ray tube Cathode ray tube

H - Electricity

01

J

313/35.35

H01J 29/02 (2006.01) H01J 29/86 (2006.01) H01J 29/88 (2006.01)

Patent

CA 1135776

28-3-1979 1 PHN 9195 ABSTRACT: "Cathode ray tube". In a cathode-ray tube, in particular a camera tube, the inner wall of the glass envelope is coated with an electrically conductive material. In order to form separate wall electrodes, said wall coating is interrupted in the proximity of electrodes extending transversely to the wall coating. These electrodes extending transversely to the wall coating are supported by a supporting surface extending transversely to the longitudinal axis of the tube. At the area of each of the interruptions the envelope has a stepwise decrease of the inside diameter in two steps. In the direction of decreasing diameter the first of these steps constitutes the supporting surface for the electrode extending transversely to the wall coating and the inter- ruption in the wall coating is provided on a wall portion of the second of these steps. The interruptions provided in this manner do not exert any disturbing influence on the electron beam in the tube.

331720

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