рготешение повагу rugimes.
Year: 1899

page_text: Date of Application, 7th Mar., 1899-Accepted, 29th July, 1899
щрготешение повагу rugimes.
I, CARL LORENZ, of Redfern, near Sydney, in the Colony of New South Wales,
Engineer, 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 improvements in rotary engines.
The objects of my invention are, to provide a rotary engine.
(a) In which the steam or other motive power will be utilized to the greatest
advantage.
(6) That will be easily reversed.
(c) In which full advantage is taken of the expansion of steam or other motive
power.
(d) Which will work without the slide bars, cross-head connecting rods, and
crank axle now in use on reciprocating engines.
(e) Which will exhaust only once in each revolution.
(f) Which for a given power will occupy less space than those now in use.
(9) Which will be light and cheaply constructed.
To obtain these results I construct an engine with an annular chamber instead
of a cylinder (but as this annular chamber performs the same functions as the
cylinder of a reciprocating engine I have hereinafter called it a cylinder").
The cross section of this annular chamber or cylinder may be of any suitable
shape, either square, oval, or as shown in the accompanying drawings circular.
This annular chamber is so constructed that an opening or annular slot is left in
the inner that is to say the smallest circumference the sides of which extend to
the centre and form bearings for the main shaft. The space between these sides
is occupied by a disc, which is concentrically keyed to the main shaft and whose
periphery closes the annular slot in the cylinder. Attached to the periphery and
forming part of this disc and placed at right angles thereto is a piston head which
fits inside the cylinder, so that as the piston revolves in the cylinder the disc and
shaft revolve with it. The main shaft, disc, and piston head, may be constructed
in one piece, if found desirable.
In order that the steam or other motive power when introduced into the cylinder
may cause the piston to revolve under full pressure a shut off valve is provided,
which opens to let the piston head pass, and closes immediately after it has passed
thus forming a closed chamber behind the piston head. This shut off valve is
operated by the steam or other motive power, the supply being governed by the
action of the main valve, which is operated by the eccentric attached to the main
shaft. This shut off valve may be placed horizontally as shown or may be placed
vertically.
To insure that the shut off valve will under all circumstances open at the proper
time, a safety guard is provided, which in the event of the shut off valve failing
to open will be operated by means of a cam fitted on the main shaft, thus providing
against any possible failure of the valve. In order to reverse the engine I provide
017

page_text: a reversing valve which when operated by reversing lever admits the motive power
into the cylinder on the opposite side of the piston, the said lever at the same
time reversing the eccentrics, exhausts, and safety guard, all of which are hercin-
after fully described.
My engine may be made with one cylinder as shewn, but I prefer to use two or
more on the same shaft, to insure steady running of the machinery and in order
that full advantage may be taken of the expansion of steam which in these
specifications I desire to include compressed air or any other motive power. If
considered desirable my engine may be made compound.
But in order that my invention may be more clearly understood I will now refer
to the accompanying drawings in which similar numerals of reference indicate
similar parts in all of the figures.
Fig. is an elevation of one cylinder engine complete showing position of
exhausts, reversing gear, eccentrics, steam pipes, safety guard, steam ports and
cushioning piston.
1 is body of engine.
2 is shut off valve cover.
3 and 3 are exhaust chambers.
4 is exhaust outlet.
5 is steam chest cover.
6 is steam valve spindle.
Tis main steam supply.
8 is crank by means of which the steam valve spindle (6) is operated by the
eccentric rods 9 and 9".
10 is shut off valve spindle.
11 is reversing valve (shown in dotted lines).
11 is spindle of reversing valve (11).
12 is crank by means of which the reversing valve (11) is operated.
13 is pipe carrying steam to cylinder.
14 is pipe carrying steam to cylinder when engine is reversed.
15 is toothed wheel keyed on shut off valve spindle (10) which engages a toothed
quadrant (16) which is connected by means of a connecting rod (17) to the safety
guard (18).
19 is main shaft to which is keyed a cam attachment 19.
20 is air cushion the piston of which is connected with the quadrant (16) for
the purpose of cushioning the shut off valve. The toothed quadrant (16) and
wheel (15) may be done away with and a crank keyed on to the shut off valve
spindle and connected direct to the piston of cushioning cylinder 20 substituted
if the shut off valve is constructed to close on the left side instead of on the right
as shewn.
21 is reversing lever which operates spindle (11) of reversing valve (11) eccen-
tric reversing link 9b, exhaust valves 3 and 3, and safety guard 18 by means
of the connecting rods 21" 21" 21° the safety guard being operated by the lower
end of the reversing lever. The position of the piston is shewn in this figure in
dotted lines, and marked 47. The positions of the different ports are also in-
dicated in dotted lines and marked as follows, the function of each being herein-
after fully described.
22 is main supply port in valve face.
23 is corresponding port in valve.
24 is port through which the steam enters the cylinder through pipe 13.
25 is port through which the steam enters the cylinder through pipe 14 when
engine is reversed.
26 is port in reversing valve (11) through which steam is admitted to port 25
when the valve is reversed.
27 is port in main valve which admits the steam through port 28 in the valve
face to open the shut off valve.
29 is exhaust for the steam which is used to operate the shut off valve.

page_text: 15 port in valve 38, and 28 is port in valve face 38".
29 is exhaust recess in under side of valve 38. The positions of these ports
are shown in Figure 1.
42, 43, 44, 45 are expansion rings let into the walls of the chamber in which
the disc 36 revolves.
Figure 3 is an enlarged view of shut off valve cover, with steam chest cover
removed showing main valve 38 with steam ports as before described. The face
of the shut off valve 30 and the fixed stop which is constructed on the reverse
side of the cover are shown in dotted lines.
When valve 30 is shut as shown the chamber or recess (34) which is constructed
on the face thereof extends from A to B the fixed stop occupying the space from C
to B so that in this position of the valve 30 the chamber 34 is on the left hand
side of the stop, but when the valve is revolved and in an open position the side A
of chamber 34 meets the side C of stop and the side B travels to the point I thus
forming the chamber 34 on the right hand side of the stop. This action of the
shut off valve 30 is caused by the alternate admission of the steam through ports 22
and 28, as hereinafter described.
Figure 4 shows the interior of cylinder, with disc, and piston in position, and
section through shut off valve.
13 and 14" are the main steam supply ports into cylinder only one of which is
open at a time 13 being connected with pipe 13 and 14" with pipe 14, (Figure 3).
47 is piston head which forms part of and is at right angles to the disc 36.
47 is piston ring of which there may be one or more X and Y are the main
exhaust ports only one of which is open at a time.
35 and 35 are expansion strips let into the shut off valve 30. It is not essential
that the valve 30 should occupy so much space in the recess 30" as shown, it would
be sufficient if it extended a little beyond the expansion strip 35".
Figure 5 is reverse or inner face of shut off valve cover showing shut off valve
stop with steam ports and reversing valve and steam ports.
10 is aperture which fits over shut off valve spindle 10.
49 is fixed stop which may be an integral part of the cover. This stop is shown
in position by dotted lines in Figures 1 and 3.
50 is expansion strip.
Figure 6 is plan of top side of steam valve 38 showing the two steam ports 23
and 27.
Figure is plan of the reverse or under side of steam valve 38 showing the
steam ports and exhaust recess 29.
Figure 8 is elevation of steam valve 38.

page_text: Figure 9 is valve face 38" in bottom of steam chest 37 showing steam ports 22
and 28 and exhaust for the steam which operates the shut off valve 30.
The method of operating my invention is as follows:-
Assuming that the piston 47 has just passed the shut off valve 30 that is to say
in the position shown in Figure 4 the steam valve now admits steam through
ports 23 and 22 which forces the shut off valve 30 into the position shown in
Figures 3 and 4 and the steam filling the chamber or recess 34 thus formed on
one side of the stop 49 passes through the port 24 pipe 13 and into the cylinder
through port 13" which is between the piston in its present position and the
valve 30 which is now shut. It is clear from this that no steam can pass through
the ports 23 and 22 into the cylinder without first shutting the valve 30. After
the steam thus admitted into the cylinder has moved the piston say 90 degrees
or about half a revolution the steam valve cuts off the steam and the piston is
now propelled by the expansion of the steam about another 40 degrees; but a
little before the piston has arrived in this position the steam valve admits steam
through ports 27 and 28 to the opposite or opening side of the stop 49 and opens
the shut off valve 30 the steam on the other or closing side of the stop exhausting
at the same time through exhaust 29. The opening of the valve 30 occurs the
moment the piston 47 has passed the main exhaust X. The piston now travels
past the valve 80 and immediately it passes the steam from opening side of stop
exhausts through port 29 and at the same time the steam is admitted through
ports 23 and 22 thus closing the valve 30 and entering the cylinder as before thus
completing a revolution. In order to provide against any possible failure of the
steam to open the valve 30 I provide a safety guard as shown in Figure 1 and
marked 18 one end of which is attached to the lower end of the reversing lever 21
for the purpose of altering its position when the engine is running the reverse
way the other is attached by means of a connecting rod 17 to a lever crank 16"
which has on one end a toothed quadrant 16 which engages a toothed wheel 15
keyed to spindle 10 of valve 30, while the other is attached to the piston of a
cushioning cylinder 20.
In order to operate the safety guard a cam attachment 19 is keyed to the
main shaft, in such a position that should the steam fail to open the valve the cam
will press on the safety guard and by lowering the connecting rod 17 cause the
quadrant 16 to revolve the spindle 10 and so open the valve 30. The action of
opening the shut off valve by the steam is so arranged as to be slightly ahead of
the cam attachment on main shaft, so that the mechanical movement only comes
into operation if the steam fails to open the valve. The cushioning cylinder 20
is provided for the purpose of cushioning the shut off valve and prevent any knock
against the fixed stop 49 as it opens and shuts.
I do not claim or confine myself to the safety guard as described and shown
in Figure 1, but reserve to myself the right to use any other suitable attachment
for the purpose.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same has to be performed, I declare that what
I claim is:-
1. In a rotary engine the combination on a shaft or spindle of a disc (such as 36)
and piston head (such as 47) with annular chamber or cylinder (such as 46) sub-
stantially as described and as illustrated in the drawings.
2. In a rotary engine the combination of a shut off valve (such as 30) with an
annular chamber or cylinder (such as 46) substantially as described and as illus-
trated in the drawings.
3. In a rotary engine the combination on a shaft (such as 19), disc (such as 36),
piston head (such as 47), shut off valve (such as 30), with an annular chamber
(such as 46) substantially as described and as illustrated in the drawings.
4. In a rotary engine the combination of a shut off valve (such as 30) having a

page_text: recess (such as 34) on face thereof with a fixed stop (such as 49) substantially as
described and as illustrated in the drawings.
5. In a rotary engine the combination of a valve (such as 38) valve face (such
as 38) ports (such as 22, 23, 27, 28, 29 and 29) with a shut off valve (such as 30)
and fixed stop (such as 49) substantially as described and as illustrated in the
drawings.
6. In a rotary engine the combination of a valve (such as 38) valve face (such
as 38") ports (such as 22, 23, 27, 28, 29, and 29") shut off valve (such as 30) fixed
stop (such as 49) with a reversing valve (such as 11) and ports (such as 24, 25
and 26) substantially as described and as illustrated in the drawings.
7. In a rotary engine the combination and arrangement of a valve (such as 38)
valve face (such as 38") ports (such as 22, 23, 27, 28 and 29") shut off valve (such
as 30) reversing valve (such as 11) and ports (such as 24, 25 and 26) with a shaft
(such as 19), disc (such as 36), piston head (such as 47), and annular chamber or
cylinder (such as 46) in which are supply ports (such as 13" and 14"), and exhaust
apertures (such as X and Y) and exhaust reversing valves (such as 3b and 3°).
Dated this 6th day of March 1899.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Agents for the Applicant.