1 effects perfect combustion of
the heated mixture of air and gas, which is introduced by the draught
determined by the arrangement. What chiefly distinguishes this burner
from others of its class is the fact that it is perfectly suited to
domestic lighting--that is to say, it may be arranged for a
comparatively small consumption of gas, while giving an increase of
250 per cent. of light.
[Illustration: FIG. 1. and FIG. 2. INCANDESCENT AND HIGH-POWER
BURNERS.]
The burner proper is a cage or basket of specially prepared magnesia,
which yields a warmer tone of light than any obtained hitherto, while
not requiring so high a temperature before combustion. The cap, made
of a fire-resisting substance, fits on to a tubular arrangement, R,
fixed in the upper portion of the body of the burner. The latter is
supplied by air entering at the cone, O, which terminates the inner
chamber, K, of the heater, and also by that drawn in by the rising
column of gas, passing before the orifices, D, which may be regulated
at will. The small burner, I, which is kept constantly alight, heats
the central compartment, K, the sides of which transmit heat to the
gas circulating in the annular casing, L, of the compartment. The
heated gas passes, by the passage, AA?, into the space, C, where it
becomes intimately mixed with the air entering at OP, and also with
the outer air arriving by the lateral apertures, D.
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