Compressed Air Work And Diving 1909
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CHAPTER IV.
Rouquayrol-Denayrouze Apparatus—Fleuss
Dress—The Diving Bell—Pumps.
I iie Rouquayrol and Denayrouze apparatus was in-
vented by a French mining engineer, Rouquayrol, and a
French naval lieutenant, Denayrouze, in the year 1864.*
It is used on the Continent with the ordinary divino- dress
and is carried 011 the diver’s back. It consists of a Steel
cylinder of about 0.28 cub. ft. capacity, which acts as a
reservoir for the air as delivered by the pump, and a
smaller chamber in direct communication with the helmet
by means of a pipe. I he air in the reservoir is usually
kept at a pressure of about 5 Ibs. above that in the small
chamber. L he air is admitted from one chamber to the
other as follows :— 1 he small chamber is situatecl at the
top of the reservoir, and has a diaphragm in the centre
of its own top to which is attached by a rod the cone-
shapecl valve closing the opening between the reservoir
and chamber.
When the diver breathes, the pressure in the chamber
is lowered, and the water, pressing on the diaphragm,
causes the valve to open, and air is admitted, until the
pressure in the chamber is sufficient to press outwards
the diaphragm and thus close the valve.
The chief disadvantages of this apparatus are that it
* “ La Navigation Sous-Marine,” Pesce.