The operation thus not
only adjusts the quantity of water present to the desired level so that
_a_ cannot become unsealed, but it also renews the liquid when it
has become foul and nearly saturated with dissolved and condensed
impurities from the acetylene. It would be a desirable refinement to give
the bottom of the vessel a slope to the mouth of _e_, or to some
other spot where a large-bore draw-off cock could be fitted for the
purpose of extracting any sludge of lime, &c., that may collect. By
having such a water-seal, or one simpler in construction, between the
generator and the holder, the former may be safely opened at any time for
repairs, inspection, or the insertion of a fresh charge of carbide while
the holder is full of gas, and the delivery of acetylene to the burners
at a specified pressure will not be interrupted. If a cock worked by hand
were employed for the separation of the holder from the generator, and
the attendant were to forget to close it, part or all of the acetylene in
the holder would escape from the generator when it was opened or
disconnected.
Especially when a combined washer and non-return valve follows
immediately after a generator belonging to the shoot type, and the mouth
of the shoot is open to the air in the plant-house, it is highly
desirable that the washer shall be fitted with some arrangement of an
automatic kind for preventing the water level rising much above its
proper position.
Pages:
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238