The gas evolved in the generating tanks passes
through a condensing chamber situated at the base of the tank into the
equalising gasholder and so automatically controls the feed of carbide
and the evolution of gas according to the rate of withdrawal of the gas
from the holder to the service-pipes. The water in the gasholder tank
acts as a scrubbing medium to the gas. The generating tanks are provided
with sludge-cocks and a tap for drawing off condensed water. The gas
passes from the equalising gasholder, through a purifier and dryer
charged with heratol or other purifying material to the service-pipes.
The original form of the "Acetylite" generator is shown in elevation and
vertical section in Fig. 55. Wm. Moyes and Sons now make it also with a
detached equalising gasholder connected with the generator by a pipe in
which is inserted a lever cock actuated automatically through a lever and
cords by a weight above the bell of the gasholder. Some other changes
have been made with a view to securing constancy of action over long
periods and uniformity of pressure. In this form the apparatus is also
made provided with a clock-work mechanism for the supply of lighthouses,
in which the light is flashed on periodically.
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