Improvements in and Means for Producing a Continuous Vacuum in the Exhaust Chambers of Motor Engines.
Year: 1896

page_text: "Date of Application, 7th Aug., 1896-Accepted, 28th Nov., 1896
الا الله
COMPLETE SPECIFICATION.
Improvements in and Means for Producing a Continuous Vacuum
in the Exhaust Chambers of Motor Engines.
"I, AUGUST DAUBER, of Bochum Westfalia, Germany, Merchant, do hereby declare
the nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
My invention relates to a new method of and the means for producing a continuous
vacuum in the exhaust spaces of steam or other motor engines and for condensing:
at the same time without the use of water all, the exhaust steam or other hot
exhaust gases.
For these purposes I proceed as follows: The exhaust fluid or the steam is led
through a channel provided with a suitable intercepting valve for each end of the
cylinder, into a chamber which has direct connection with a tuyere-shaped branch,
into the centre of which is entering a conical jet-pipe through which a jet of compressed
carbonic acid, or a similar heat absorbing medium, is constantly blowing through the
said tuyere with a high velocity, so as to form an intense suction effect round its jet
pipe in the tuyere and the surrounding chamber.
At the same time, by the intense cold produced by the expanding carbonic acid or
its equivalent heat-absorbent medium, the steam in the chamber will be condensed:
To increase these effects and to completely condense all products of exhaust, I cause
the issuing heat absorbing gas and steam to be mixed in the surrounding parts of the
jet pipe by directing them through a pipe to a reservoir of suitable volume, which is
provided with a stand-pipe open at the top for the discharge of vapours not fully.
condensed, and which serves as a collector for the products of condensation that
they may be used for other purposes if so qualified.
The essential feature of my invention is the use of compressed carbonic acid or
similar medium which is a heat absorbent gas when expanding, as a means for
creating a continuous vacuum by the jet arrangement, without intermittance or
pauses at the ends of the strokes of the respective engine, so that, when the valves
at the ends of the cylinder are opening, the exhaust gases find a ready constant
vacuum in the space opened to them, and in which the jet pipe of compressed
carbonic acid is working, so that the gases may he immediately condensed and
drawn off; 1 declare as another essential feature of my invention, the injection
of the mixture of carbonic acid and condensed steam, or of other heat absorbent
media with the condensed steam, into a reservoir for collecting here the said
This is in
products of condensation and keeping them ready for further use.
opposition to the known systems of condensating exhaust steam or gases, wherein
for condensing the exhaust is added such a considerable quantity of cooling water
that collecting the latter in reservoirs of practical dimensions is excluded.
The new apparatus used for the performance of my invention is shown in a
skeleton drawing only, as the constructive details and forms must he various, since
for each special case other forms or constructive proportions will be required.
The instance represented in the accompanying drawing is for a horizontal steam
engine with slide valve gear for the admission of live steam and with special
steam-ways and conical outlet-valves for the exhaust steam.
Fig. 1 is a cross-section through the steam cylinder and the collecting chamber_
for the condensed liquid along line II II of Fig. 2.
Fig. 2 is a section through the cylinder and distribution-valves with the jet pipe
and collecting chamber along line I... I of Fig. 1.

page_text: Opposite to the steam admitting channels A are the exhaust ports B at both ends
of the cylinder and directly communicating with a common to both exhaust chest to
which is connected a tuyere G. Close to the cylinder ends said exhaust ports are
intercepted by the distribution valves C, in order to reduce the clearance or the
minimum space between the piston and the valves. These valves are opened during
the exhaust strokes of the piston for exhausting the cylinder, and during a working
stroke of the piston, away from their respective cylinder end, they are shut by any
suitable mechanical gear and by the pressure of the working steam. In the larger
opening of the conical branch or tuyere G of the exhaust chest common to both
valves C, a jet pipe or conical inner central nozzle D connected with a pipe D'
admitting the compressed carbonic acid or other heat absorbent, stands concentrically
to the conical connecting pipe E leading to the reservoir F.
Having
now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is :
1. A process of producing a continuous vacuum in the exhaust channel of steam
and other fluid motors and condensing at the same time the exhaust gases without
the use of injection or cooling water, consisting in drawing the exhaust steam from
separate exhaust ports in a chamber common to both by an injector driven by
compressed carbonic acid or any other compressed medium with heat-absorbent
quality when expanding, and in throwing the mixture of carbonic acid gas and the
exhaust condensed by the cold developped by the expanding carbonic acid or its
equivalent into a reservoir for collecting these products.
2. For carrying out the process specified in claim one, in combination with exhaust
ports B of an engine, valves C opening into a common chamber; an ejector D G
drawing the exhaust out of said chamber, a connecting pipe E conducting the exhaust
gases from said ejector into a vessel F for collecting the condensed products.
Dated this 30th day of July 1896.
AUGUST DAUBER,
Per Karl J. Mayer,
Agent.