In the early days of the industry it would have
been impossible to speak so favourably of automatic carbide-to-water
generators, for they were at first constructed with absurdly complicated
and unreliable mechanism; but now various carbide-feed gears have been
devised which seem to be trustworthy even when carbide not in cartridge
form is employed.
NON-AUTOMATIC CARBIDE-TO-WATER GENERATORS.--There is little to be said in
the present place about the principles underlying the construction of
non-automatic generators. Such apparatus may either be of the carbide-to-
water or the water-to-carbide type. In the former, lumps of carbide are
dropped by hand down a vertical or sloping pipe or shoot, which opens at
its lower end below the water-level of the generating chamber, and which
is fitted below its mouth with a deflector to prevent the carbide from
lodging immediately underneath that mouth. The carbide falls through the
water which stands in the shoot itself almost instantaneously, but during
its momentary descent a small quantity of gas is evolved, which produces
an unpleasant odour unless a ventilating hood is fixed above the upper
end of the tube.
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