| 摘要 |
<p>A heavy-current mercury low-pressure lamp with pressure equalization space, wherein the anode and cathode electrodes are arranged one behind the other in a bulb and wherein the one of the two arms of the discharge space projects coaxially into the bulb and passes through the annular-shaped anode. The arm of the discharge space which projects into the bulb extends at least as far as the cathode and surrounds the latter laterally. Arc-through through the pressure compensation space is prevented and the average useful life of such lamps is thereby prolonged.</p> |
