Year: 1887

page_text: We, HEZEKIAH ROGERS of Vyvyan House, Clifton Park, Bristol, Gentleman and
EDWARD JOSEPH CURTIN of 1 Montague Villas, Clifton Wood, Bristol, Engineer do
hereby declare the nature of this invention to be as follows:-
This invention relates more particularly to a construction of high speed single
acting high pressure or compound or triple expansion engine in which, for compound,
the high and low pressure cylinders are arranged in such manner that there are two
diametrically opposite low pressure cylinders, the pistons of which are both connected
rigidly to a central loop in which works a crank on the engine shaft while the high
pressure cylinder or cylinders arranged at a right angle or other angle to the low
pressure cylinders has or have its or their pistons connected by rods to the same or
a different crank or cranks on the engine shaft, the supply of steam to the high
pressure cylinder or cylinders being regulated by a disc valve revolving with the
engine shaft, or otherwise, while the passage of the steam to the low pressure
cylinders is effected through ports governed by the piston or pistons of the high
pressure cylinder or cylinders.
According to one arrangement we employ for this purpose, there are two high
pressure cylinders arranged on opposite sides of the engine shaft, with their piston
rods connected to one and the same crank while two low pressure cylinders are
arranged at right angles to the high pressure cylinders with their pistons connected
to two loops in which work the pin of the same crank as that to which the pistons of
the high pressure cylinders are connected, the connections of the latter being situated
between the two loops of the former. The four cylinders are all connected to or
formed in one with a central chamber enclosing the crank shaft and carrying the
bearings for each end thereof. On the one side of this chamber is formed a steam
chest, supplied with high pressure steam, and containing a flat disc valve carried

page_text: round by the crank shaft, which valve has a port which, as it revolves, alternately
passes over the ports of two passages leading respectively to the outer end of each
high pressure cylinder, so that steam is thereby admitted alternately to the outer end
of each cylinder when its piston arrives at the end of its outstroke.
Two other passages establish a communication respectively between the outer end
of each low pressure cylinder and a port in the side of each high pressure cylinder,
this port being placed at such a point that it is uncovered by the piston as this
approaches the end of its instroke, so that the high pressure steam then passes to the
outer end of the corresponding low pressure cylinder the piston of which is then at or
about the end of its outstroke.
Lastly, the low pressure cylinders have ports in their sides at such positions that
they are uncovered by the pistons as they approach the end of their instroke, so
as to allow the expanded steam to escape cither to a condenser or into the
atmosphere.
Instead of arranging the high pressure cylinders diametrically opposite each other,
they may be arranged side by side, the steam supply being governed by slide valves
or rotating valves or partially rotating valves governed by cams, cranks or excentrics
or links on the engine shaft or worked from the engine shaft; with this arrangement
the low pressure pistons have a single loop in which works a central crank on the
engine shaft, while each high pressure piston is connected to a crank on either side
of the low pressure crank, and placed at or about right angles thereto.
Instead of having two high pressure cylinders each expanding into a low pressure
cylinder there may be a single high pressure cylinder, the steam from which expands
into one of the low pressure cylinders and from this it expands into the second low
pressure cylinder, these cylinders being diametrically opposite and connected to the
same loop as before.
Either of the foregoing arrangements may be used as an air compressing engine or
steam pump by using one or more cylinders as steam cylinders and one or more
cylinders for compressing air or pumping.
In another arrangement the cylinders may be arranged on opposite sides of the
crank shaft and the steam supply regulated by a valve with a curved or flat face
situated in a valve chest situated between the cylinders and driven by a lever worked
from the shaft; the engine may either consist of two opposite single acting high
pressure cylinders, or one high and one low pressure, or two high pressure and two
low pressure arranged side by side on each side of the shaft. The steam supply to
the low pressure cylinders may be effected by uncovering ports in the high pressure
cylinders when the pistons have nearly completed their stroke as before described, or
the supply may be regulated by valves as in the high pressure cylinders.
In using these engines for working an air compressor or pump, two high pressure
cylinders, or a compound engine, may be arranged on one side of the central chamber
and the air compressor or pump may be arranged on the opposite side, or the air
compressing cylinder or cylinders or the pumps may be driven from a crank or
eccentric or link on the main shaft. Any or either of the pistons in this arrangement
may be fitted with a loop as before or with connecting rods.
These engines may be worked as steam or hydraulic engines or worked by
compressed air.
Dated this 2nd day of October 1987
ABEL & IMRAY,
Agents for the Applicants. .

page_text: Improvements in Motor Engines Worked by Steam or other Fluid
or Liquid Pressure, these Improvements being Applicable also
to Air Compressors or Pumps Worked in Conjunction with such
Motor Engines.
We, HEZEKIAH ROGERS, of Vyvyan House, Clifton Park, Bristol, Gentleman, and
EDWARD JOSEPH CURTIN, of 1 Montague Villas, Clifton Wood, Bristol, 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:
This invention relates more particularly to a construction of high speed single
acting high pressure or compound or triple expansion engine in which, for compound,
the high and low pressure cylinders are arranged in such manner that there are two
diametrically opposite low pressure cylinders the pistons of which are both connected
rigidly to a central loop in which works a crank on the engine shaft while the high.
pressure cylinder or cylinders arranged at a right angle or other angle to the low
pressure cylinders has or have its or their pistons connected by rods to the same or a
different crank or cranks on the engine shaft, the supply of steam to the high pressure
cylinder or cylinders being regulated by a disc-valve revolving with the engine shaft,
or otherwise, while the passage of the steam to the low pressure cylinders is effected
through ports governed by the piston or pistons of the high pressure cylinder or
cylinders.
According to one arrangement we employ for this purpose, there are two high
pressure cylinders arranged on opposite sides of the engine shaft, with their piston
rods connected to one and the same crank while two low pressure cylinders are
arranged at right angles to the high pressure cylinders with their pistons connected to
two loops in which work the pin of the same crank as that to which the pistons of the
high pressure cylinders are connected, the connection of the latter being situated
between the two loops of the former. The four cylinders are all connected to or
formed in one with a central chamber enclosing the crank shaft and carrying the
bearing for each end thereof. On the one side of this chamber is formed a steam
chest, supplied with high pressure steam, and containing a flat disc valve carried
round by the crank shaft, which valve has a port which as it revolves, alternately
passes over the ports of two passages leading respectively to the outer end of each
high pressure cylinder, so that steam is thereby admitted alternately to the outer end
of each cylinder when its piston arrives at the end of its outstroke.
Two other passages establish a communication respectively between the outer end
of each low pressure cylinder and a port in the side of each high pressure cylinder,
this port being placed at such a point that it is uncovered by the piston as this
approaches the end of its instroke, so that the high pressure steam then passes to the
outer end of the corresponding low pressure cylinder, the piston of which is then at
or about the end of its outstroke.

page_text: Lastly, the low pressure cylinders have ports in their sides at such position that
they are uncovered by the pistons as they approach the end of their instroke so as to
allow the expanded steam to escape either to a condenser or into the atmosphere.
Instead of arranging the high pressure cylinders diametrically opposite each other
they may be arranged side by side, the steam supply being governed by slide valves
or rotating valves or partially rotating valves governed by cams, cranks or eccentrics
or links on the engine shaft or worked from the engine shaft with this arrangement
the low pressure pistons have a single loop in which works a central crank on the
engine shaft, while each high pressure piston is connected to a crank on either side
of the low pressure crank and placed at or about right angles thereto.
Instead of having two high pressure cylinders each expanding into a low pressure
cylinder, there may be a single high pressure cylinder the steam from which expands
into one of the low pressure cylinders and from this it expands into the second low
pressure cylinder, these cylinders being diametrically opposite and connected to the
same loop as before.
Either of the foregoing arrangements may be used as an air compressing engine
or steam pump by using one or more cylinders as steam cylinders and one or more
cylinders for compressing air or pumping.
In another arrangement the cylinders may be arranged on opposite sides of the
crank shaft and the steam supply regulated by a valvo with a curved or flat face
situated in a valve chest situated between the cylinders and driven by a lever worked
from the shaft the engine may either consist of two opposite single acting high
pressure cylinders, or one high and one low pressure, or two high pressure and two
low pressure arranged side by side on each side of the shaft. The steam supply to
the low pressure cylinders may be effected by uncovering ports in the high pressure
cylinders when the pistons have nearly completed their stroke as before described, or
the supply may be regulated by valves as in the high pressure cylinders.
In using these engines for working an air compressor or pump, two high pressure
cylinders, or a compound engine, may be arranged on one side of the central chamber
and the air compressor or pump may be arranged on the opposite side, or the air
compressing cylinder or cylinders or the pumps may be driven from a crank or
eccentric or link on the main shaft. Any or either of the pistons in this arrangement
may be fitted with a loop as before or with connecting rods.
These engines may be worked as steam or hydraulic engines or worked by
compressed air.
Figs. 1 and 2 of the accompanying drawings shew respectively a cross section and
a longitudinal section of one arrangement of motor engine constructed according to
our above described invention the end covers of the several steam cylinders being
omitted. A A are the high pressure cylinders and B B are the low pressure
cylinders.
The pistons of the latter are connected rigidly together by bars CC, and they have
formed or fixed thereon guides D D between which works a sliding block E to which
are pivotted the ends of the articulated piston rods F F of the high pressure
cylinders A A, and in which also works the crank pin of the crank shaft G.
This shaft carries a revolving disc-slide H in the chamber into which the high
pressure steam is admitted, and from which the steam passes to the outer ends of the
high pressure cylinders by the passages J. the admission of steam being governed by
the slide H. The exhaust steam passes from the high pressure cylinders to the outer
ends of the low pressure cylinders by the passages K K which are uncovered by the
pistons towards the end of their instroke. The steam escapes from the low pressure
cylinders through ports that are uncovered by the pistons at the end of their
instroke.
Fig. 3 shews a sectional side view and Fig. 4 an end view of a construction in
which there are two opposite high pressure cylinders A A, the piston rods of which are
connected to one and the same crank on the crank shaft.
The admission of steam to the cylinders is governed by the partially rotating
slide H with circular face working on the circular face of the steam passages J in the

page_text: steam chamber I, the slide being mounted on a spindle J which receives the requisite
reciprocating motion by a crank pin G' on the crank shaft, working in the slot of a
lever L fixed on J.
This construction may also he used as a compound engine by making the one
cylinder of larger size, the high pressure steam being in that case admitted to the
smaller cylinder by the slide H. and the exhaust steam passing to the low pressure
cylinder by a passage arranged similarly to K Fig. 2.
In the arrangement shewn in longitudinal section, end view and plan respectively
at Figs. 5, 6 and 7, the high pressure cylinder A and low pressure cylinder B are
arranged vertically side by side, having their pistons connected to opposite cranks on
the shaft, the steam supply to the high pressure cylinder being governed by the
disc slide H in the steam chamber I, while the exhaust steam passes from A into
chamber K through port K, and thence into low pressure cylinder B through port K,
the exhaust steam escaping from B through port B¹.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the said is to be performed, we declare that what
we claim is :-
1. The construction of high speed single acting motor engines, arranged and
operating substantially as herein described.
2. The combined arrangement of high speed single acting motor engines and air
compressors or pumps substantially as herein described.
Dated this 23rd day of July 1888.
ABEL & IMRAY,
Agents for the Applicants.