U.S. Philips Corporation

Arnoldus H Van Eck

Gerrit Van Der Heijden

Johannes H Johanns

A color cathode ray tube includes an in-line electron gun. The electron gun includes at least a tubular part which is composed of two (or more) folded portions which are secured to each other.

Color cathode ray tube

A method of manufacturing an electron gun component, in which the electrodes are positioned in a jig by means of positioning means which are located at the edge of the electrodes. The method does not use pins to position the electrodes. In an exemplary embodiment, the electrodes are stacked in the jig with clearance. The positioning means are located at the vertices of a polygon which comprise the apertures in the electrodes. If an electrode is tubular in shape, the positioning means and the apertures in the electrode are preferably located in one plane.

Electron gun component with electrode positioning means

A cathode ray tube comprising an electron gun having a number of electrodes with securing members and a number of supports of electrically insulating material, said supports and electrodes being interconnected by means of serrated clamping members. By virtue of this construction, the microphonic behavior of the electron gun is improved.

Cathode ray tube comprising an electron gun

Method of assembling an electron gun component

The invention relates to a method of manufacturing an electron gun for use in a cathode ray tube. The electrodes of the gun have plate-shaped fastening members (19) which at the free end partly surround an aperture (45). One step of the method is the bonding to each other of the electrodes and the supports (21, 22) by softening the supports and making the fastening members penetrate the supports. The protruding part (44) of the fastening member is at an angle with the direction of penetration, such that a constrained material flow through the aperture (45) develops. Thus, the fastening members (19) cool down and are clamped along various lines (46, 47, 48), which leads to an improved microphonic behaviour.

Method of manufacturing an electron gun

A color television display tube comprising three electron guns arranged in line and each comprising successively a triode part, a first lens electrode and a second lens electrode. The first lens electrode of each of the outermost guns is secured to insulating assembly rods by means of two suspension braces situated at an axial distance from each other in such manner that the brace situated nearer the triode part is secured to the outer surface of the first lens electrode remote from the central electron gun and the brace situated nearer the second lens electrode is secured to the outer surface of the first lens electrode facing the central electron gun. Such a construction results in a low thermal convergence drift.

Growing community of inventors

Eindhoven, Netherlands

Arnoldus H Van Eck