IMPROVEMENTS IN ROTARY ENGINES AND PUMPS
Year: 1884

page_text: I RICHARD PICKUP PARK of Normanby Road, South Melbourne in the
Colony of Victoria, Engineer do hereby declare the nature of my Invention for
"IMPROVEMENTS IN ROTARY ENGINES AND PUMPS " to be as follows:-
•
My Invention of improvements in rotary engines has been designed for the
following purposes; first, for providing a means whereby the steam in rotary engine
cylinders may be worked expansively by the introduction of a rotary cut off valve
having an adjustable port or steam supply opening therein and fitted on the engine
shaft and working in a suitable valve chest. This valve also carries a governor
for regulating the speed of the engine when used single acting (or working only
one way); secondly, in providing an arm piston made curved on the one side, and
flat on the other, and having its edgewise wearing surfaces packed with metallic
strips which are held up by small spiral springs fitted into said arm piston;
thirdly, in providing a divisional ring which is sprung into the grooves provided in
covers or ends of cylinder to form a perfectly steam tight joint. This ring is fitted
with metallic packing rings on its outer periphery near both its ends. The gap
edge of this divisional ring at the back of the arm piston has a transverse groove
formed in it which is filled in with a metallic strip seated on small spiral springs,
the front gap edge is fitted with a small steel friction roller attached thereto,
which travels on the curved face of said arm piston. It will be obvious that when
this divisional ring is used in a reversing rotary engine, it would require to have
the metallic strip and springs on both sides of the gap, so as to ensure a perfect
steam tight joint. Fourth-In providing at the bottom of the cylinder a metallic
joint piece or pad carefully fitted in a recess formed therein and seated on spiral
springs, as before, to ensure a good steam tight joint between it and the before
mentioned divisional ring, thereby preventing the steam from passing from steam
to exhaust side of same at this point. When it is required to use my improvements
in an expansive reversing rotary engine, an additional ordinary slide valve or a
suitable cock or some such mechanical means is required to conduct the steam
from one side of the piston to the other as desired. My improvements may also be
used in compound rotary engines by simply placing the cylinders side by side and
allowing the steam, after being used in the high pressed cylinder, to pass into the
low pressed cylinder, as is already well known, or they may be separato and
distinct cylinders placed on convenient beds, and the steam conducted from the
high pressure exhaust pipe to the low pressure valve chest by suitable pipes; and
I make the cylinders of such proportion to one another as to get the best results
possible out of the steam used. When my Invention is used for a compressed air
engine, the rotary valve and other parts similar to that used for steam purposes
would be required. When used as a water engine, the rotary valve and valve

page_text: chest would not be required. When used as a gas engine, a special rotary valve
together with other attachments is required which I will hereinafter describe.
When my rotary water engine piston is worked by some other motive power it
makes a very serviceable suction or force pump.
Referring to the Drawings, Figure 1 shews side elevation, Figure 2 plan with 5
the cylinder shewn in horizontal section and the valve piston removed, and Figure 3
end elevation with the cylinder cover removed, of iny improved rotary engine.
Figure 4 is an end elevation of the cylinder cover with the steam chest cover taken
off.
Figure 5 is a vertical section of cylinder through line a a Figure 4. Figures 6
and 7 are longitudinal section and end view of the arm piston. Figure 8 is an
outside elevation of the divisional ring, and Figure 9 a cross section on the
line in Figure 8. Figures 10, 11, 12 and 13 are four different views of the
rotary cut off valve. Figure 14 is a vertical section of a cylinder for a reversing
rotary engine, and Figure 14 is section of part of cover and part divisional ring
shewing the section of compensating or wearing pieces. Figure 15 is an end
elevation of the cylinder cover with the valvo chest cover removed, and Figure 16
vertical section of said cylinder as designed for a gas engine. Figure 17 is a side
view of the rotary gas valve. Figure 18 is an end, and Figure 19 a side elevation
of my rotary engine cylinder as constructed for a water engine or pump.
Figures 1 to 13 represent the several views and details of a simple acting rotary
engine designed for being worked expansively either by steam or air, in which
A represents the cylinder fitted on the jacket A' which is secured to the bed
plate A. This bed plate also carries the two standards A' in the bearings of
which the engine shaft A' works, on which shaft is keyed the pulley Aº, and fly
wheel A. On the back cylinder cover A is cast or formed the valve chest A",
which has a suitable cover A°. A10 is the steam or air supply branch, and B¹ the
exhaust branch, the former leading into the valve chest, and the latter projecting
from the cylinder cover A, but leading from the exhaust passage at bottom of
cylinder A similarly marked. The front cylinder cover A is provided with a
stuffing box A" and gland A¼, as is usual for steam joints. B and B are the
steam and exhaust passages formed in the bottom of the cylinder, and having the
line of the port holes B and B³ for communicating with the interior of said
cylinder A. The steam passage B leads upwards through the back cylinder
cover A7, and enters the valve chest As through the valve face B. The arm piston C,
which is keyed on the engine shaft A', is recessed or grooved on its end, and on
both edges, and fitted with the metallic strips C', which are cushioned or seated on
the spiral springs C³, placed in the holes provided for them, thereby forming a
perfect steam or air-tight joint. It will be noticed that the back face C of this
arm piston is made perfectly flat, and the front face C is curved, as shewn, so as
to vary the opening or gap in the divisional ring D as little as possible when in
work. The divisional ring D is sprung into, and revolves in the annular
grooves D¹, cut or formed in the cylinder covers, and has metallic rings D³ sunk in
its outer periphery near its ends, so as to prevent steam escaping through the
before mentioned annular grooves D₁. At the bottom of the cylinder this ring
travels on the metallic strip or pad D³, let into the recess in the bottom of
cylinder, and resting on the spiral springs D'. The edge of this ring in the gap
at the back of the arm piston has a groove formed in it, in which is fitted a
Inetallic strip D³, forced forwards by the small spiral springs D. The front edge
in said gap has a friction roller D' working in bearings formed thereon. There are
also four compensating or wearing pieces K fitted flush into cylinder covers inside
said divisional ring D, as shewn. These pieces are made adjustable by being fixed
in their recesses by the screw pius K³ which pass through oblong slots provided in
said wearing pieces K, so as to allow them to be set to fit the inner circumference
of divisional ring D, and prevent undue pressure on outer circumference of same.
The rotary adjustable cut off valve E has key ways E¹ cut in it, which fit on the
feathers or pins fixed to the engine shaft A, to carry and cause to revolve said
valve. This valve has a port E as shewn, and a recess formed on its outer

page_text: periphery, in which is fitted the two portions of a metallic ring Ę³ which is
divided diagonally as shown in Figure 12, directly opposite to the port E². The
one half of this ring E³ is a fixture, and the other half is secured to the valve E
by the countersunk headed bolts E, which pass through oblong holes in said valve,
thereby providing a means for adjusting the length of the port E². Es is the
governor pivotted to the valve on the tap bolt Ee and controlled by the spiral
spring E. This valve is turned on its outer circumference to work on valve
face Band faced up at the back to work on the facing provided on front cylinder
cover, thereby preventing the escape of steam from chest to cylinder.
Figure 14 illustrates a vertical section of the cylinder of a reversing rotary
engine, in which the additional parts necessary to convert the before described
single acting into a reversing engine are shewn, and which may be worked
expansively by the before described rotary cut off valve. In this Figure, similar
letters indicate similar parts to those previously referred to, and, in addition
thereto, is a slide valve working on the valve face in the valve chest F¹, and
connected to the hand-lever F, by the valve spindle F³. G is the steam supply
branch, and G¹ the upper exhaust port. G and G³ are the annular passages
leading from the ports in valve face to the passages B' and B at the bottom of the
cylinder before referred to. The divisional ring D for a reversing engine requires
to have both its edges abutting on the arm piston C fitted with the metallic
strip D and spiral springs Do, so as to form a steam joint on either side of said
arm piston.
Figure 14 shews section of part of cylinder cover and part of divisional ring D
with the before referred to compensating or wearing strips K fitted in position.
Figures 15, 16 and 17 illustrate the additions and alterations necessary for
working my improved rotary engine by the explosion and consequent expansion of
a given quantity of gas fed at regular intervals, or, to speak more simply, for
converting it into a gas engine. For this purpose, the port now marked HL in the
rotary valve E is somewhat different, as it has no side opening, it being now
simply a recess or chamber as shewn. The valve face supply and exhaust passages
are similar to those previously described. The gas supply pipe H' and air pipe H*
are fixed in the positions shown. A gas jet or flame H³ is also placed, as shewn,
opposite the hole H+ which is controlled by a trigger or flame regulating valve H³
pivotted in a recess inside of the cylinder A. This is opened by means of the
sliding pin H which is forced forwards at the desired position by means of the.
spring H7, which, together with said pin, is fitted in the end of the arm piston C.
The annular passage L formed around the cylinder is used in my gas engine as a
cold water jacket into which the water is fed through the inlet pipe L', and finds
egress through the outlet pipe 1. as shewn. Alternative set up or wearing pieces
are shewn in Figure 16, where there are four friction rollers Llet into cylinder
covers, and fitted on to four slide pieces LA, fixed to said covers as before.
Figures 18 and 19 illustrate elevations of my rotary cylinder A as altered for
either a water engine or a suction pump, the internal parts of cylinder being a
fac-simile of that previously described for a steam engine. It will be noticed that
the valve chest and ports leading therefrom and consequently tho rotary cut off
valve have been dispensed with, and that the inlet and outlet ports B and B' in
the bottom of cylinder, simply project far enough from cover to allow them to
be connected to the supply and discharge or the suction and delivery for either an
engine or pump.
The mode of operation in a single acting engine, that is, an engine working one
way only, as described with reference to Figures 1 to 13, is as follows. Steam or
air being supplied through the branch pipe A into valve chest A³, when the
port E³, in the rotary cut off valve E is travelling over port B in valvo faco B*,
steam or air is admitted through said passage B into the cylinder A, and pushes
forward the arm' piston C, until such time as the port E' in said rotary valve E
has traversed over the port B in said valve face B₁, after which the blank face of
the valve passes over same, which cuts off the steam or air supply to cylinder, and

page_text: the steam or air, expanding, still forces round the piston C and its attached
divisional ring D, until the piston C has passed over the exhaust port B¹, when the
steam or air is free to escape, and the arm piston C, moving forward to the required
distance beyond the steam or air port B, the steam or air is again admitted, and
the foregoing operation repeated, until the engine is stopped by closing the supply
cock. The speed of the engine is regulated by the governor E³ attached to the
rotary valve Ė.
The operation of the double acting or reversing engine is similar to the foregoing,
so far as the action of the rotary cut off valve E and of the steam on the piston is
concerned, and so far as its being admitted by one port, and exhausting through
the other, but the conducting of the steam into the required passage leading to
said ports B and B is accomplished by the slide valve operated by the hand
lever F. The steam then being admitted through the passage on the one side,
after doing its duty in the cylinder, finds exit through the opposite passage, and
finally exhausts under the slide valve F into the atmosphere or otherwise. And
in the case of a compound engine, the exhaust steam either enters direct into the
adjoining low-pressed cylinder, or into the valve chest on said low pressed
cylinder.
The operation in a rotary gas engine which is fitted with my special valvo
herein before described is, that the required quantity of gas and air are admitted
through recess in chamber H in said rotary cut off valve and through gas passage
into cylinder, and the piston, rotating opens the trigger valve H³, which allows
enough gas to escape through hole H to ignite the gas in said cylinder. This
trigger valve H is almost immediately closed by reason of the arm piston C
quickly passing over it, thereby preventing the flame froin being blown out by the
explosion of contained gas. The consequent explosion and expansion of the
contained gas then forces the piston C forward, until the exhaust port B is reached,
when the above mechanical movements will be again repeated. During the
working of the gas engine, a current of cold water is caused to pass through the
annular passage L around cylinder. If it were desired to make this gas engine
reversible, a trigger valve H³ would be required on the other side of piston also,
and the gas and air would have to be led from the rotary cut off valve to the
opposite port and side of piston, the gas being then ignited on that side only for
the time being.
The operation in my rotary engine driven by water power is as follows. The
rotary valve E, valve chest A³, and ducts or passages leading therefrom to ports in
bottom of cylinder would not be necessary. The water would be simply admitted
in the one port and its force exerted on that side of piston C until the exhaust or
discharge port was reached where the water would find sufficient area for exit, and
so on, If the reverse motion wero desired, the water would require to be fed on
the opposite side, and so on, as is well known.
'
I also desire to state that my rotary engine, as before described, can be used as a
rotary suction or force pump, that is by its arm piston C being on and consequently
driven by one of my before described rotary engines affixed to the same bed when
the power would be direct acting, or the rotary pump may be driven by having a
pulloy fixed on its piston shaft, which is driven by a belt or pulley on some other
power or by spur gearing or otherwise. The operation would be that the inlet
pipe to pump cylinder would be fixed to the port on the one side of said cylinder,
and the discharge fitted to the port on the other side.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
W.C.
London,

page_text: I, RICHARD PICKUP PARK of Normanby Road, South Melbourne, in the Colony
of Victoria, Engineer do hereby declare the nature of my Invention for "IMPROVE-
MENTS IN ROTARY ENGINES AND PUMPS " and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
This Invention of improvements in rotary engines has been designed for the
following purposes; first, for providing means whereby the steam in rotary engine
cylinders may be worked expansively by the introduction of a rotary cut off valve
baving an adjustable port or steam supply opening therein and fitted on the ongine
shaft and working in a suitable valve chest. This valve also carries a governor for
regulating the speed of the engine when used single-acting (or working only one
way); secondly, in providing an arm piston made curved on the one side and flat
on the other, and having its edgewise wearing surfaces packed with metallic
strips, which are held up by small spiral springs fitted into said arm piston;
thirdly, in providing a divisional ring which is sprung into the grooves provided in
covers or ends of cylinder to form a perfectly steam tight joint. This ring is fitted
with metallic packing rings on its outer periphery near its outer ends. The gap
edge of the divisional ring at the back of the arm piston has a transverse groove
formed in it which is filled in with a metallic strip fitted on sinall spiral springs;
the front gap edge is fitted with a small steel friction roller attached thereto which
travels on the curved face of said arm piston. It will be obvious that when this
divisional ring is used in a reversing rotary engine, it would require to have the
metallic strip and springs on both sides of the gap so as to ensure a perfect steam
tight joint. Fourth, in providing at the bottom of the cylinder a metallic joint
piece or pad carefully fitted in a recess formed therein and seated on spiral
springs as before to ensure a good steam tight joint between it and the before-
mentioned divisional ring, thereby preventing the steam from passing from steam
to exhaust side of same at this point. When it is required to use my improve-
ments in an expansive reversing rotary engine, an additional ordinary slide
valve or a suitable cock or some such mechanical means is required to conduct
the steam from one side of the piston to the other as desired. My improvements
may also be used in compound rotary engines by simply placing the cylinders side
by side and allowing the steam, after being used in the high pressed cylinder to
pass into the low pressed cylinder as is already well known, or they may be
separate and distinct cylinders placed on convenient beds and the steam conducted
from the high pressure exhaust pipe to the low pressure valve chest by suitable
pipes, and I make the cylinders of such proportion to one another as to get the
best results possible out of the steam used. When my Invention is used for a
compressed air engine the rotary valve and other parts similar to that used for
steam purposes would be required. When used as a water engine, the rotary valve
and valve chest would not be required. When used as a gas engine a special
rotary valve, together with other attachments, is required, which I will hereinafter
describe. When my rotary water engine cylinder and piston are worked by some
other motive power, they make a very serviceable suction or force pump.
Referring to the Drawing, Fig. 1 shews side elevation, Fig. 2 plan with the
cylinder shewn in horizontal section and the valve piston removed, and Fig. 3 end
elevation with the cylinder cover removed, of my improved rotary engine; Fig. 4
is an end elevation of the cylinder cover with the steam chest cover taken off,
Fig. 5 is a vertical section of cylinder through line a a Fig. 4, Figs. 6 and 7 are

page_text: longitudinal section and end view of the arın piston; Fig. 8 is an outside elevation
of the divisional ring and Fig. 9 a cross section on the line b b in Fig. 8; Fig. 10
11, 12 and 13 are four different views of the rotary cut-off valve; Fig. 14 is a
vertical section of a cylinder for a reversing rotary engine, and Fig. 14" is section
of part of cover and part divisional ring shewing the section of compensating or
wearing pieces. Fig. 15 is an end elevation of the cylinder cover with the valve
chest cover removed, and Fig. 16 vertical section of such cylinder as designed for a
gas engine. Fig. 17 is a side view of the rotary gas valve; Fig. 18 is an end and
Fig. 19 a side elevation of my rotary engine cylinder as constructed for a water
engine or pump.
Fig. 1 to 13 represent the several views and details of a simple acting rotary
engine designed for being worked expansively either by steam or air and in which
A represents the cylinder fitted on the jacket A¹ which is secured to the bed
plate A This bed plate also carries the two standards A³ in the bearings of
which the engine shaft A works, and on which is keyed the pulley A' and fly
wheel A. On the back cylinder cover A' is cast or formed the valve chest A³
which has a suitable cover A. A¹ is the steam or air supply branch and B' the
exhaust branch, the former leading into the valve chest and the latter projecting
from the cylinder cover A7, but lending from the exhaust passage at bottom of
cylinder A similarly marked. The front cylinder cover A1 is provided with a stuffing
box A and gland A" as is usual for steam joints. B and B' are the steam and
exhaust passages formed in the bottom of the cylinder and having the line of the
portholes B and B for communicating with the interior of said cylinder. A. The
steam passage B leads upwards through the back cylinder cover A³, and enters the
valve chest As through the valve face B. The arm piston C which is keyed on the
engine shaft A is recessed or grooved on its end and on both edges and fitted
with the metallic strips C which are cushioned or sented on the spiral springs Ce
placed in the holes provided for them thereby forming a perfect steam or air tight
joint. It will be noticed that the back face C of this arm piston is made
perfectly flat, and the front face C is curved as shown, so as to vary the opening
or gap in the divisional ring D as little as possible when in work. The divisional
ring D is sprung into and revolves in the annular groove D¹, formed in the
cylinder covers, and has metallic rings D2 sunk in on its outer periphery near its
ends so as to prevent steam escaping through the before-mentioned annular
grooves D. At the bottom of the cylinder this ring travels on the metallic strip
or pad D let into the recess in the bottom of the cylinder and which rests on the
spiral springs D. The edge of this ring in the gap at the back of the arm piston
has a groove formed in it, in which is fitted a metallic strip D³ forced forward by
the small spiral springs De. The front edge in said gap has a friction roller D'
working in bearings formed thereon. There are also four compensating or wearing
pieces K fitted flush into cylinder covers inside said divisional ring D, as shewn.
These pieces are made adjustable by being fixed in their recesses by the screw-
pins K which pass through oblong slots provided in said wearing pieces K, so
as to allow them to be set to fit the inner circumference of divisional ring D and
prevent undue pressure on outer circumference of same. The rotary adjustable
cut off valve E has key ways E' cut in it which fit on the feathers or pins fixed to
the engine shaft A' which carry and revolve said valve. This valve has a port E³
as shewn and a recess formed on its outer periphery in which are fitted the two
portions of a metallic ring E which is divided diagonally as shown in Fig. 12
directly opposite to the port E. The one half of this ring E³ is a fixture, and
the other half is secured to the valve E by the countersunk headed bolts E which
pass through oblong holes in said valve thereby providing means for adjusting
the length of the port E³. E is the governor pivotted to the valve on the tap
bolt E and controlled by the spiral spring E. This valve is turned on its outer
circumference to work on valve face B and faced up at the back to work on the 5
facing provided on front cylinder cover thereby preventing the escape of steain
from chest to cylinder.

page_text: Fig. 14 illustrates a vertical section of the cylinder of a reversing rotary engine
in which the additional-parts necessary to convert the before-described single
acting into a reversing engine are shewn and which may be worked expansively
by the before described rotary cut off valve. In this Figure, similar letters of
reference indicate similar parts to those previously referred to, and in addition
thereto, F is a slide valve working on the valvo face in the valve chest F¹ and
connected to the hand lever F by the valve spindle F. G is the steam supply
branch and G the upper exhaust port. G and G³ are the annular passages
leading from the ports in valve face to the passages B₁ and B at the bottom
of the cylinder before referred to. The divisional ring D for a reversing engine
requires to have both its edges abutting on the arm piston C fitted with
the metallic strip D³ and spiral springs De so as to form a steam joint on either
side of said arm piston. The steam can either pass directly from the boiler
through G and G G into the cylinder, if the engine is not required to work
expansively, or in the other case, the chest A Fig. 5 of the expansion valve is
made to communicate by a passage with the chest F' so that the supply of steam
to the latter is regulated by the expansion valve.
Fig. 14 shews section of part of cylinder cover and part of divisional ring D
with the before referred to compensating or wearing strips fitted into position.
Figs. 15, 16 and 17 illustrate the additions and alterations necessary for working
my improved rotary engine by the explosion and consequent expansion of a given
quantity of gas fed at regular intervals or, to speak more simply, for converting it
into a gas engine. For this purpose the port now marked H in the rotary valve E
is somewhat different as it has no side opening, it being now simply a recess or
chamber as shewn. The valve face supply and exhaust passages are similar to
those previously described. The gas supply pipe H and air pipe H³ are fixed in
the positions shewn. A gas jet or flame H is also placed as shewn opposite the
hole H which is controlled by a trigger or flame regulating valvo H³ pivotted in
a recess inside of the cylinder A. This is opened by means of the sliding pin H
which is forced forward at the desired position by means of the spring H7 which,
together with said pin, is fitted in the end of the arm piston C.
The annular passage L formed around the cylinder is used in my gas engine as
a cold water jacket into which the water is fed through the inlet pipe L¹ and finds
egress through the outlet pipe L³ as shewn. Alternative set-up or wearing pieces
are shewn in Fig. 16 where there are four friction rollers L³ let into cylinder
covers and fitted on to four slide pieces L' fixed to said covers as before.
Figs. 18 and 19 illustrate elevations of my rotary cylinder A as altered for
either a water engine or a suction pump, the internal parts of cylinder being a
fac-simile of that previously described for a steam engine. It will be noticed
that the valve chest and ports leading therefrom and consequently the rotary cut
off valve have been dispensed with, and that the inlet and outlet ports B and B' in
the bottom of cylinder simply project far enough from cover to allow them to be
connected to the supply and discharge or the suction and delivery for either an
engine or pump.
The mode of operation in a single acting engine, that is an engine working one
way only as described with reference to Figs. 1 to 13 is as follows. Steam or air
being supplied through the branch pipe A into valve chest As from whence, when
the port in the rotary cut off valve E is travelling over port B in valve face B+
steam or air is admitted through said passage B into the cylinder A and pushes
forward the arm piston C until such time as the port E in said rotary valve E
has traversed over the port B in said valve face B' after which the blank face of
the valve passes over same which cuts off the steam or air supply to cylinder, and
the steam or air expanding still forces round the piston C and its attached
divisional ring D until the piston C has passed over the exhaust port B' when the
steam or air is free to escape, and the arm piston C moving forward to the
required distance beyond the steam or air port B, the steam or air is again
admitted and the foregoing operation repeated until the engine is stopped by

page_text: closing the supply cock. The speed of the engine is regulated by the governor E
attached to the rotary valve E. The operation of the double acting or reversing
engine is similar to the foregoing so far as the action of the rotary cut off valve Ĕ
and the steam on the piston is concerned and so far as its being admitted in one
port and exhausted through the other but the conducting of the steam into the
required passage leading to said ports B and B is accomplished by the slide
valve F, operated by the hand lever F. The steam then being admitted through
the passage on the one side, after doing its duty in the cylinder finds exit through
the opposite, passage and finally exhausts under the slide valve F into the
atmosphere or otherwise. And, in the case of a compound engine, the exhaust
steam either enters direct into the adjoining low pressed cylinder or into the valve
chest on said low pressed cylinder.
The operation in a rotary gas engine which is fitted with my special valve
herein before described is that the required quantity of gas and air are admitted
through recess in chamber A in said rotary cut-off valve and through gas passage B
into cylinder and the piston rotating opens the trigger valve H which allows
enough gas to escape through hole H to ignite the gas in said cylinder. This
trigger valve H is almost immediately closed by reason of the arm piston C
quickly passing over it thereby preventing the frame from being blown out by the
explosion of contained gas. The consequent explosion and expansion of the
contained gas then forces the piston C forward until the exhaust port B is reached
when the above mechanical movements will be again repeated. During the
working of the gas engine a current of cold water is caused to pass through the
aunular passage L around cylinder. If it were desired to make this gas engine
reversible, a trigger valve H would be required on the other side of piston also
and the gas and air would have to be led from the rotary cut off valve to the
opposite port and side of piston, the gas being then ignited on that side only for
the time being.
y
The operation in my rotary engine driven by hydraulic pressure is as follows:
The rotary valve E, valve chest A and ducts or passages lending therefrom to
ports in bottom of cylinder would not be necessary. The water would be simply
admitted in the one port and its force exerted on that side of piston C until the
exhaust or discharge port were reached, where the water would find sufficient area
for exit, and so on. If the reverse motion were desired, the water would require to
be fed on the opposite side and so on, as is well known.
1 also desire to state that my rotary engine as before described can be used as
a rotary suction or force pump, that is by its arm piston C being on and
consequently driven by one of my before described rotary engines affixed to the
same bed, when the power would be direct acting, or the rotary pump may be
driven by having a pulley fixed on its piston shalt, which is driven by a belt and
pulley on some other power or by spur gearing or otherwise. The operation would
be that the inlet pipe to pump cylinder would be fixed to the port on the one
side of said cylinder and the discharge fitted to the port on the other side.
Having now particularly described and ascertained the nature of this
Invention and in what manner the same is to be performed, I declare that what
I claim is
1. The rotary adjustable cut off or expansion valve E fitted on the engine
shaft A' and with or without a governor E³ substantially as herein described and
explained and as illustrated by the Drawings.
2. The metallic arm piston C keyed on engine shaft A* made flat on one side
and curved on the other and having its end and two edges grooved out to receive
strips of metallic packing Ci held up by small spiral springs C² substantially as
herein described and explained and as illustrated by the Drawings.
3. The divisional ring D whose edges abut on the before described arm piston
and both of which edges have transverse grooves cut in them filled with metallic
packing strips De held forward by ispiral springs D° as shewn in Fig. 14; or
instead of both edges having such grooves and packing, one only may be so

page_text: constructed and the other provided with a friction roller D7 as shewn in Fig. 9,
substantially as herein described and explained, and illustrated by the Drawings.
4. The compensating or wearing pieces K fitted flush in the cylinder covers A
and A inside said divisional ring Ɗ substantially as and for the purpose herein
described and explained and as illustrated by the Drawings.
5. The joint piece or pad Ds fitted into the recess formed in the bottom of a
rotary engine cylinder A in the manner and for the purpose substantially as
berein described and illustrated by the Drawings.
6. The combination of the special rotary cut off chamber valve E, the trigger
valve H, operating pin Ho spring H' gas and air supply pipes H' and H* with the
cylinder having an outer jacket L through which a current of cold water flows
and the before described arm C, piston and divisional ring D for the purpose of
producing a gas engine substantially as herein described and explained and as
illustrated by Figs. 15, 16 and 17 of the Drawings.
7. The governor Es attached by a tap bolt E to the rotary valve E and
controlled by a spiral spring E7 also affixed to valve and governor all substantially
as described and explained as illustrated by the Drawings.
Dated this 24th day of July 1884.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.