Method of and equipment for ageing a low-pressure hot-cathode di

Details Method of and equipment for ageing a low-pressure hot-cathode di Method of and equipment for ageing a low-pressure hot-cathode di

1989-03-21

1990-02-06

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With start up, flashing or aging

445 62, H01J 944

Patent

active

048985546

ABSTRACT:
The ageing process of a low-pressure hot-cathode gas discharge light source, especially a fluorescent lamp is carried out by applying high alternating voltage being at least 8 times and at most 16 times higher than the burning voltage rating of the gas discharge light source after preheating electrodes thereof, whereby a short discharge arc is generated and then after changing the connecting arrangement of the input terminals of the electrodes the application of high alternating voltage is repeated. The equipment for carrying out the process of ageing comprises at least one supply unit for generating high alternating voltage being at least 8 and at most 16 times higher than the burning voltage rating of the gas discharge light source, at least one ignition system for breaking a circuit at maximal momentary value of a preheating current applied to electrodes of the light source and means for changing the connecting arrangement of output terminals of the electrodes to the supply unit and for altering output connection terminals of the supply unit with at least one current source.

REFERENCES:
patent: 2977176 (1961-03-01), McCauley
patent: 4195253 (1980-03-01), Drop et al.

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