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lucas full range | gas lanterns
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Lucas Upright Lamp
It embodies a principle which makes it possible to
produce with low-pressure gas a lighting unit approaching in power
that realised with high-pressure gas, and of an efficiency considerably
higher than that obtained by the usual low-pressure gas lamp. Before
the inverted gas mantle, Lucas designed a lamp to give "intensified"
light with the upright incandescence burner, and for this purpose he used
of long chimney to give a "pull" on the burner. With the use of the long
chimney Lucas found that it was possible to work with a more highly
aerated combustible mixture which gave more light from the mantle. The
upright Lucas lamp was very successful for use indoors, and although out-of-doors
it was somewhat sensitive to wind, a considerable number were used for
public lighting in its day.
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Upright Lucas Lamp
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??? candle power
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??? burners
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Post Top
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1937 Paper
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Lucas Suspension Lamp
Uses the same principles as the Upright Lucas Lamp (see above).
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Lucas Suspension Lamp
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??? candle power
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??? burners
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Top Entry
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1937 Paper
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Prototype Chimney Pull Suspension Lamp
The advent of the inverted mantle and inverted gas
burner with its higher lighting efficiency caused the
Lucas Upright Lamp to be superseded. Lucas then turned his
attention to the application of the chimney pull principle
to the inverted burner and mantle; but, it appears, without
much successs - at least, as far as outdoor gas lamps
were concerned. The section diagram is taken from the Lucas specification
for indoor use. The specical feature of this lamp was a burner consisting
of a bunch of small bore metal tubes (A) through which the combustible
mixture of air and gas passed, and from the lower ends of which
it issued to be burnt. The bruner and the mantle were enclosed in an
air-tight globe (B), and a long chimney (C) produced the pull required to
induce secondary air to be drawn in at (D) and to pass between the tubes,
thus supplying the extra amount of air necessary for complete combustion
of the mantle. Lamps for outdoor use using these principles were never
successfully produced as a slight wind upset the steadiness of the light.
The principle was later taken up by Keith in the
development of his Magnalux Lamp.
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Prototype Lamp
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??? candle power
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1 burner
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Top Entry
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1937 Paper
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