Year: 1886

page_text: I, WILHELM SCHMIDT of Braunschweig in the Empire of Germany, Engineer do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in steam-engines with injectors and
consists of four modifications which are characterized by bringing the steam into
action on each side of the piston or pistons consecutively, in such a manner that
before each passage of the steam which has given off work on one side of the
piston to the other side, a partial suction compression and regeneration of the
steam takes place, by means of an injector while the steam volumes not sucked off,
will pass for further utilization and expansion into the cylinder or cylinders.
It will be understood that this improvement may be applied not only by single
cylinder engines, but also to engines with two or more cylinders.
In applying my improvements to a steam-engine with a single cylinder I let the
steam act differently on both sides of the piston, the left side taking its steam from
the valve box; after the same has partly expanded and given off work, it passes
through a channel and pipe into a reservoir, where it is compressed again and
forced into the box for further utilization in the cylinder, by means of the injector
pipe fed from the boiler.
:
The steam taken from the valve box and giving off work on the right side of
the piston, passes, after having been utilized, into a channel and from the latter,
by means of a pipe, into the air or into a condenser.
A modification of the described arrangement for an engine with a single cylinder
consists in dividing the valve box into two parts, the right hand part forming also
a reservoir (in connection with the pipe conduit attached thereto) into which the
vapours expanded on the left side of the piston, pass.
By this arrangement the right side of the piston is worked by steam of less
expansion. A part of the expanded steam conducted into the valve box through
a pipe from the left side of the piston, is sucked off through another pipe by
ineans of an injector and conducted back in a compressed state into the left part
of the slide box, while the other part of the steam admitted into the slide box,
acts on the right hand side of the piston, in order to be expelled through a channel
either into the free air or a condenser.

page_text: If an engine has several cylinders the method of the utilization of the steam
described may also be applied to cylinders of equal or unequal size.
When applying the same to an engine with unequal cylinders the steam is
caused to enter through an orifice formed in a joint valve box, into the latter and
through a port to the left side of the piston of the larger cylinder for instance at a
pressure of six atmospheres, where it will expand to five atmospheres.
After the steam has given off work it escapes through the aforesaid port and
passes through the valve cavity into a cavity formed in the cylinder which
communicates with a channel on the left side thereof.
This steam is forced into the valve box partly in a compressed state, by means
of an injector while the other part passes through the valve cavity and the right
port of the smaller cylinder expanding from five to three atmospheres and giving
off work.
After such expansion the steam expanded to three atmospheres enters through
the aforesaid right port and another valve cavity, into a cavity formed at the left
end of the small cylinder which communicate with the aforesaid port or channel
between the large & small cylinders.
Out of the latter the steam is forced partly in a compressed state by means of
an injector into a second injector and also through the left part of the small cylinder
into the latter, giving off work, and expanding from 3 to 1, 5 atmospheres.
After its expansion the steam passes through the left port of the small cylinder,
and a valve cavity into a channel which is in communication with another channel
through which the steam passes into a valve cavity and port on the right side of
the large cylinder where it further expands and afterwards passes through the
aforesaid port and another cavity, into the condenser.
Where equal cylinders are employed a treble back suction & compression of
the steam takes place by means of the injector.
The course and action are as follows.
The steam coming from a joint valve box enters through the port on the left side
of the left cylinder and expands for instance from 5 to 3, 5 atmospheres, from
where it passes through the aforenamed channel into the valve cavity, & by
means of a pipe, into a cavity formed in the right cylinder, which cavity is in
communication with the right side of the right cylinder by means of a valve cavity
and port.
This steam is partly brought back in a compressed state into the valve box by
means of an injector and passes through a pipe in the valve cavity and port, giving
off work into the right side of the right cylinder where it expands from 3, 5 to 2.
5 atmospheres.
On the latter steam escaping, it enters through the right port of the right
cylinder and valve cavity into pipes which communicate with cavities formed
in the cylinder, out of which the same is compressed by means of an injector into
another injector from where the steam passes through one of the aforesaid pipes
into the respective valve cavity and port and into the left portion of the left
cylinder where it expands from 2. 5 to 1-5 atmospheres and gives off work.
After this steam has given off work it gets through the port cavity and channel
on the right side of the left cylinder into channels formed in the left cylinder froin
where the same is forced back partly in a compressed state, by means of the upper
injector, into the middle one, and for the purpose of giving off work, will enter the
right cylinder through the valve cavity and port communicating with the left port
of the right cylinder where it will further expand from 1, 5 atmosphere, to be
afterwards conducted into the condenser by means of a pip valve cavity on the
left part of the right cylinder, and another pipe.
It will be understood that this mode of application may be used in engines
with more than two cylinders.
The described method is characterized by the fact that the steam which has
given off work in the cylinder is collected into a reservoir from where it is partly

page_text: sucked off & compressed by means of an injector, while the other part of the steam
gets at once further expanded in another cylinder.
In place of compressing only a part of the steam the whole may also be com-
pressed again and the compressed and through the injector increased steam
employed separately, that is to say, to feed the same cylinder from which it has
been taken and to drive it after its expansion into one or more side cylinders,
which in this manner also become high pressure cylinders.
It will be seen that in the side cylinders, only that steam from the injector will
be employed, while in the other cylinder or cylinders, towards which the back
suction & return take place, a perfect cycle is obtained.
The steam from the boiler, at a pressure of 20 atmospheres enters into the
reservoir, which for instance is under a pressure of 5 atmospheres, sucks the steam
of same after it, and compresses the same to 8 atmospheres, in order that in the
joint pipe and pipes connected hereto, the same pressure exists.
One of the latter pipes conducts the steam to the valve box from where the main
cylinder is fed.
In the latter the steam expands to 5 atmospheres & from where it returns
through a port and pipe to the reservoir.
The superfluous steam which is delivered by the injector passes through the
said pipe and is fed into the side cylinder for expansion & giving off work in
the usual manner & from where if desired it can be brought into other cylinders
arranged behind with escape or condensation.
1
1
7000
Pro WILHELM SCHMIDT,
Bosshardt & Grant,
Agents to the Applicant.

page_text: I, WILHELM SCHMIDT of 48, Leonhardstr. at Brunswick in the German Empire,
Engineer, do hereby declare the nature of my invention for IMPROVEMENTS IN OR
RELATING TO STEAM ENGINES, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :-
This invention relates to improvements in steam-engines with injectors and
consists of five modifications, characterized by bringing the steam into action on
each side of the piston or pistons consecutively, in such a manner, that before each
passage of the steam, which has given off work on one side of the piston, to the
other side, a partial suction compression and regeneration of the steam takes place,
by means of an injector, while the steam volumes, not sucked off, will pass for
further utilization and expansion into the cylinder or cylinders. It will be under-
stood that this improvement may be applied not only by single cylinder engines
but also to engines with two or more cylinders.
In applying my improvements to a steam engine with a single cylinder, as
shown in fig. I, I let the steam act differently on both sides of the piston, the left
side k taking up steam from the valve box s; after the steam has partly expanded
and given off work, it passes through a channel a and pipe a¹ into a reservoir R,
where it is compressed again by the steam injector pipe g and forced into the box 8
for further utilization in the cylinder; the injector pipe g being fed from the
boiler. The steam taken from the valve box 8 and giving off work on the right
side of the piston, passes, after having been utilized, into a channel b and
from the latter by means of a pipe 6 into the air or into a condenser and is
not compressed again like the steam having been utilized on the left side of the
piston.
Fig, II shows a modification of the described arrangement for an engine with
a single cylinder, which consists in dividing the valve box into two parts, the right
hand part forming also a reservoir, which is in connection with the receiver R
and with the injector pipe g¹ leading to this receiver. The receiver R is also in
connection with the left hand parts of the valve box. A pipe c leads from the left
hand part al of the valve box to the right hand part . In this arrangement the
steam is conducted into the left hand s¹ of the valve box by means of a pipe and
expands after having given off work on the left side of the piston. Now the
steam enters the pipe c and gains the right hand part of the valve box. A part
of this steam enters the right hand part of the piston ¹ in order to be expelled
after its expansion through a channel n either into the open air or a condenser.
The other part of this expanded steam, admitted into the slide box through pipe c
is sucked off by means of an injector g¹ through the pipe and conducted back in
a compressed state into the left part s¹ of the slide box. By this arrangement the
right side of the piston is worked by steam of less expansion than the left.
If an engine has several cylinders the method of the utilization of the steam
described may also be applied to cylinders of unequal or equal size. When
applying the same to an engine with unequal cylinders, as shown in fig. III, the
steam is caused to enter through an orifice a³ formed in a joint valve box a into

page_text: the latter, through a port c¹ to the left side b¹ of the piston of the larger cylinder,'
for instance at a pressure of 6 atmospheres, where it will expand to 5 atmospheres.
After the steam has given off work it escapes through the aforesaid port c¹ and
passes through the valve cavity into a cavity r forined in the cylinder which
communicates with a channel R on the left side. This steam is partly forced back
into the valve box a in a compressed state, by means of an injector G', while the
other part of the steam exhausting from pipe R passes through the valve cavity 26
to the right port c* of the smaller cylinder 64 expanding from 5 to 3 atmospheres
and giving off work. After such expansion, the steam expanding to 3 atmospheres
enters through the aforesaid right port c and gains another valve cavity . From
this cavity it enters the pipe S which communicates with the pipes and channel ¿+
between the large and small cylinders. Out of pipes S s the steam is partly forced
back in a compressed state by means of an injector G' into a second injector G¹;
the remainder of this steam enters the left part 3 of the small cylinder by the
channels c³, giving off work there and expanding from 3 to 1, 5 atmospheres
After its expansion the steam passes through the left port c³ of the small cylinder
and a valve cavity into a channel T which is in communication with another
channel t, through which the steam passes into a valve cavity a port c² on the
right side 6 of the large cylinder where it further expands and afterwards passes
through the aforesaid port c² and another cavity into the condenser pipe p.
Where equal cylinders are employed as shown in fig. IV a treble back suction
and compression of the steam, takes place by means of the injector. The course
and action are as follows:
The steam coming from a joint valve box a¹ enters through the port e' on the
left side m of the left cylinder, expands, for instance from 5 to 3, 5 atmospheres,
from where it passes through the aforenamed channel e¹ into the valve cavity o¹ by
means of a pipe r R, into a cavity o6, which cavity is in communication with the
right side m¹ of the right cylinder by means of a valve cavity oⓇ and port e*.
This steam contained in the pipes R is partly brought back in a compressed
state into the valve box a¹ by means of an injector . The other part of this
steam passes through the pipe R in the valve cavity of and port e giving off work
into the right side m' of the right cylinder where it expands from 3, 5 to 2,
5 atmospheres. On the latter steam escaping, it enters through the right port e* of
the right cylinder and valve cavity o' into the pipes S 8, which communicate with
cavities o². This steam contained in the pipes Ss is partly compressed and by
means of an injector conducted to another injector and to the valve box a¹.
The other part of the steam passes through the pipe s into the respective valve
cavity o² and port e² and into the right portion m² of the left cylinder, where it
expands from 2, 5 to 1, 5 atmospheres and gives off work.
After this steam has given off work it gets through the cavity e¹ and channel os
into the pipe t T, from where it is partly forced back in a compressed state, by
means of the upper injector 1, into the middle one and the other part of this
steam contained in pipes t T will enter the cylinder space m³ through the valve
cavity o* and port ea communicating with the left part m³ of the right cylinder,
where it will further expand from 1, 5 atmospheres, to be afterwards conducted
into the condenser pipe by means of a pipe valve cavity o' on the left part of the
right cylinder. It will be understood that this mode of application may be used in
engines with more than two cylinders.
The described method is characterized by the fact, that the steam which has
given off work in the cylinder is collected into a reservoir from where it is partly
sucked off and compressed by means of an injector, while the other part of the
steam gets at once further expanded in another cylinder.
In place of compressing only a part of the steam, as described in the foregoing
four modifications, the whole steam may also be compressed again and the com-
pressed and through the injector increased steam employed in two directions,
that is to say, a part of the whole increased steam shall be used to feed the
same cylinder from which it has been taken and the other part shall be used in the

page_text: common way in another cylinder, in which it expands. This arrangement is
represented in fig. V.
It will be seen that in the cylinder M only that steam from the injector 8 will be
employed, while in the other cylinder or cylinders a perfect circle is obtained.
The steam from the boiler at a pressure of 20 atmospheres enters through the
injectors the pipe G which for instance is under a pressure of 8 atmospheres, and
the pipes E F. The left pipe E conducts the steam to the valve box D, from where
the main cylinder is fed, and this steam enters into the cylinder M on the right
hand. In the latter the steam, expands to 5 atmospheres, after which expansion it
leaves the right side of the cylinder and gets through the pipes CC on to the
reservoir B, from which it has been sucked off by the injector 8, and is conducted
back to the pipe E in a compressed state.
1
The superfluous steam passes through the pipe F and can be brought into the
cylinder N of the common well known construction, from where if desired, it may
pss to other cylinders arranged behind with escape or condensation.
Having now particularly described the nature of my said invention and in
what manner the same is to be performed, I declare that what I claim is:
1.) The proceeding in a steam engine with injectors to conduct the steam at first
into one side of a steam cylinder and to compress it after its expansion partly by
an injector and to use the other part of this steam directly without compression on
the other side of the cylinder as set forth.
2.) The modification of the proceeding claimed above.consisting in compressing
the whole steam, which has worked at one side of a cylinder, and using the one
part of this steam increased by the steam of the injector, in two directions as
described.