Videocolor

Gerard Proudhon

Jacques Baudry

Olivier Trinchero

The insertion device of the invention comprises an insertion rod. The external diameter of the front end of this insertion rod is greater than the diameter of the body. This rod is hinged, as if pivoted, on its actuating support.

Device for the insertion of cathodes in cathode tube guns, especially

To avoid the deflection phenomenon of the red and blue spots of a trichromatic tube with in line cathodes, as a function of a variation of the focusing voltage, the holes corresponding to these two colors are enlarged over a distance of about 0.1 to 0.2 mm.

Device for correcting the deflection effect due to a variation of the

Electron gun for cathode ray tube, the electrostatic lenses of which comprise an electrode that remains at a high voltage after shut-down of the power supply of the tube, wherein in order to reduce the effect, apparent through an interference glimmer upon the screen on the K cathode of the high voltage remaining on the electrode after shutdown of the power supply, means for masking this voltage are provided that form part of an electron gun electrode of intermediary position between the first high voltage electrode and the cathode, and wherein preferably, the intermediary electrode has an elongated form according to the axis of the gun with two end walls, of which that turned towards the cathode has a greater thickness than the thickness of the opposite wall.

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Venissieux, France

Gerard Proudhon