DocumentCode :
1375457
Title :
The application of electric discharge lamps to daylight signalling
Author :
Bourne, H.K. ; Beeson, E.J.G.
Volume :
97
Issue :
59
fYear :
1950
fDate :
10/1/1950 12:00:00 AM
Firstpage :
587
Lastpage :
594
Abstract :
The light output of high-power daylight signalling lanterns of the non-directional type for marine use depends on the light output of the source itself, since only a small gain can be obtained from any optical system without restricting the angle of beam divergence. Incandescent lamps and carbon arcs both have limitations as high-power signalling sources, but the high-pressure mercury-vapour lamp has peculiar advantages. The paper records the history of the application of this lamp to daylight signalling equipment. It describes the various types of discharge-lamp signalling equipment which have been used. In the latest type, no mechanical shutter is employed, as the arc is ignited instantaneously by a high-voltage impulse circuit operated by the signalling key.
Keywords :
discharge lamps;
fLanguage :
English
Journal_Title :
Proceedings of the IEE - Part II: Power Engineering
Publisher :
iet
Type :
jour
DOI :
10.1049/pi-2.1950.0173
Filename :
5239947
Link To Document :
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