TV CRT with HV bushing in glass bulb - has mushroom shaped holding lug formed by deep drawing from sheet metal bushing bottom

摘要

The high voltage bushing is sealed in the tube glass bulb and is of pot of frustoconical shape. It is intended for mounting the getter inside the tube bulb. The part penetrating into the bulb vacuum is in the form of a mushroom-shaped lug or holding the getter tablet or coating. The entire bushing assembly is deep drawn from sheet metal. The holding lug (3) is deep drawn from the bottom part (4) of the high voltage bushing (2). The head of the holding lug may be formed by upsetting or rolling. Preferably the bushing and the holding lug are of rotation symmetrical shape. The diameter of a neck portion (5) of the holding lug does not exceed half the diameter of the bottom part of this lug.