AN IMPROVED SELF-ACTING APPARATUS FOR REMOVING OR WITHDRAWING AIR OR OTHER GASES FROM WATER PIPES AND OTHER WATER CONDUITS, IN ORDER TO REGULATE THE PRESSURE OF AIR THEREIN AND PREVENT BURSTING OR OTHER INJURY THERETO."
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Ernest de Pass at the Office of the
Commissioners of Patents on the 18th July 1878. A communication from
abroad by Victor Hugo Trübenbach, of Chemnitz, in the Empire of Germany.
ERNEST DE PASS, of 68, Fleet Street, in the City of London, Patent Agent.
"AN IMPROVED SELF-ACTING APPARATUS FOR REMOVING OR WITHDRAWING AIR OR
OTHER GASES FROM WATER PIPES AND OTHER WATER CONDUITS, IN ORDER TO
REGULATE THE PRESSURE OF AIR THEREIN AND PREVENT BURSTING OR OTHER
INJURY THERETO." A communication from abroad by Victor Hugo Trübenbach, of
Chemnitz, in the Empire of Germany.
This Invention has for object the construction of a self-acting apparatus in order
to remove or withdraw air or other gases from water pipes and other water
conduits, so as to prevent bursting or other injury to such pipes or conduits.
This apparatus which is fitted at suitable parts of a water pipe or other water con-
duit, consists of a vertical cast-iron hollow cylinder or casing fitted with a cover at
top, and provided at bottom with a flange to permit of its being bolted or screwed on
a corresponding flange on the pipe or other conduit. An aperture lined with a metal
socket is contrived in the cover in order to allow the air which enters this cylinder
to escape therefrom. Inside this cylinder is placed a second cylinder, but made of
tin. It is open at its lower end and rests when in its lowest position, on a convex
plate or support fitted in the lower end of the outer cylinder or casing. This inner
cylinder which is closed at its upper end is furnished with an india-rubber washer
or disc, in order to close hermetically the aperture of the outer cylinder, when the
inner one, owing to the pressure of air, is forced to rise and come against it, and at
the same time prevent the escape of the water in the outer cylinder. The inner
cylinder is guided in its up-and-down movement by wings or ribs formed on the
inner face of the outer cylinder.
The working of the apparatus is as follows:-The water flowing out of the pipe
or conduit into the outer cylinder rises therein, and the air becomes compressed in
the upper part thereof, the same also taking place in the inner cylinder, dipping in

page_text: the water in the outer cylinder, and as the water lifts it the india-rubber washer
closes the aperture in the outer cylinder. Thus, the water in the space between
the cylinders will naturally enter from below, and afterwards rise more easily than
in the interior of the inner cylinder; so also will a greater volume of air becomes
compressed above in this intervening space than in the inner cylinder, consequently
the level of the water in the intervening space will be lower than the level in the
inner cylinder. The lifting pressure in the inner cylinder which causes the same to
rise becomes reduced, and the inner cylinder will in consequence of its weight sink
until it rests upon the convex plate or support, fitted in the lower part of the outer
cylinder, and the aperture becoming for a short time free, the compressed air found
in the intervening space will flow out with an extra pressure of several atmospheres
above the outside atmospheric air, and when the surfaces of water in the inner and
outer cylinders reaches the same level; the inner cylinder will again be closed and
so on.
.
The weight of the inner cylinder as well as the aperture in the outer cylinder
must vary according to the pressure of the air, and the size of the pipe to which the
apparatus is to be applied.