" This
material is stated to act as a desiccating as well as a purifying agent.
The general arrangement of the plant is shown in the illustration. (Fig.
38).
[Illustration: FIG. 38.--"KNAPPICH" GENERATING PLANT.]
_Maker_: NORDISCHE AZETYLEN-INDUSTRIE; ALTONA-OTTENSEN.
_Type_: Automatic; water-to-carbide; "drawer."
The apparatus made by this firm consists of an equalising gasholder with
bell _D_ and tank _E_, a water-tank _O_, and two drawer
generators _C_ situated in the base of the gasholder tank. The
water-supply from the tank _O_ through the pipe _P_ with valve
_Q_ is controlled by the rise and fall of the bell through the
medium of the weight _J_ attached to the bell. When the bell
descends this weight rests on _K_ and so moves a counter-weighted
lever, which opens the valve _Q_. The water then flows through the
nozzle _B_ into one division of the funnel _A_ and down the
corresponding pipe to one of the generators. The generators contain trays
with compartments intended to be half filled with carbide. The gas
evolved passes up the pipe _T_ and through the seal _U_ into
the bell of the gasholder. There is a safety pipe _F_, the upper end
of which is carried outside the generator house.
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