| 摘要 |
<p>In order to reduce the cold filling pressure of noble gas in the case of high-pressure discharge lamps, the volumes of the spaces in the bulb necks (2, 2') which are filled with relatively cold gas when the lamp is in operation and are remote from the bulb are filled by means of a disc or discs (9, 9'), which preferably consists of aluminium oxide ceramic and is/are pushed onto the electrode rods between a supporting element (6, 6') and a spiral spring (8) which provides the position. This facilitates starting, because of the reduced breakdown voltage, and leads to increased arc stability, because of the reduced convection. In addition, the discs relieve the stress on the supporting element (6, 6') which supports the electrode rod (4, 4'), both mechanically and - supported by a coating (11'), which increases the emission, on the bulb neck seal (7) and base region (5, 5') - thermally. …<IMAGE>… </p> |
