Improvements in Rotary Engines.
Year: 1897

page_text: Date of Application, 17th Apr., 1897-Accepted, 23rd Oct., 1897
COMPLETE SPECIFICATION.
Improvements in Rotary Engines.
We, EBER BLAKE TREE, of 022 Princess Street, in the Town of Woodstock, in
the County of Oxford, in the Province of Ontario, Canada, Insurance Agent, and
ROBERT HENRY ELDON, of 343 Olinton Street, in the City of Toronto, in the
County of York, in the Province of Ontario, Canada, School Teacher, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
_
The object of the invention is to design a simple, easily controlled, noiseless and
economic form of rotary engine in which there will be no back pressure and which
may be run to a very high rate of speed with little wear or tear and it consists
essentially of a ring piston secured or forming part of a disc concentric to and
secured on the end of the main driving shaft such ring piston being enclosed by a
suitable casing, a pin being secured on the opposite side of the casing to that of
the shaft to which it is eccentric, which pin extends into the interior of the ring
piston and has journalled on it wings which extend through slots in the ring piston
into a chamber concentric to the journal pin of the wings, such wings being
designed to be carried around by the pressure of the steam from the inlet port, and
the inlet and the exhaust ports being constructed and controlled in the manner
hereinafter more particularly explained.
Fig. 1, is a perspective view of our rotary engine with one side of the casing
partially broken away to exhibit the interior construction.
Fig. 2, is a longitudinal section.
Fig. 3, is a sectional plan.
Fig. 4, is a perspective detail of the wings.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A is the main shaft, which has secured to its inner end the disc B having the
ring piston B' preferably forming part of same. C is the outer disc plate through
which the shaft A. extends and around which is formed a suitable bushing con
the shaft. C is the plate at the opposite side. c¹ is a pin secured in the plate C¹
and extending into the ring piston Bin such a manner that it is eccentric though
parallel to the axis of the main shaft.
Dis the central portion of the casing, which is secured to the disc plates C
and C by bolts d.
The
E is the bed-plate which is secured beneath the casing by the bolts e.
central portion D of the casing forms an interior chamber D' concentric to the
eccentrically placed pin c¹. F is the disc plate located inside the disc C¹ and
having a central aperture f, the edge of which is flush with the interior peripheral
face of the ring piston B. G are packing rings extending around each side of the
casing and abutting the discs B and F and designed to keep the joint between
such discs and central portion of the casing steam tight.

page_text: Although we show this as spring-held it will of course be understood that any
suitable form of packing rings might be employed, such as oil. The position of
these rings is also indicated by dotted lines in Fig. 2.
Hare wings journalled on the eccentrically placed pin c¹ in somewhat the
manner of a hinge with narrow portions. I are rollers which fit within corre
sponding cross slots in the ring piston B. On each side of the slot b we provide
spring-pressed packing which presses against the roller I and thereby serves to
make the joint steam tight. These rollers I are journalled at the end in circular
recesses in the disc plate B and at the opposite side in circular recesses f¹ in
the plate F. The wings H have side packing which also abuts and holds steam
tight the edges of the rim against the faces of the disc plates B and C. The
wings H extend through slots 2 in the rollers I and the rollers are cut away at 13
on each side of the slot so that as the wings change their position such cut away
portion will be always within the ring piston and thereby prevent any danger
of such piston binding in its rotation. The concentric chamber D' is so formed as
to have a slight depression 12 at the side nearest the ports into which the ring
piston B extends.
Jis a spring-held packing extending across the centre of these recesses, so as to
press against the ring piston B¹ and hold it steam tight between the ports, Jare
the ports which lead obliquely through an extension 1 of the casing D as indicated
to a point on each side of where the ring B₁ fits the recess D². is a circular
recess made in the extension D within which fits the cylindrical cut-off valve K.
The cylindrical cut-off valve K is formed with a central passage-way & having an
oblique extension which in the drawing is shown opposite to the upper port J.
is a passage way leading through the cylindrical cut-off valve K from the lower
port J, which in the position shown in the drawing is now serving for the exhaust.
L is a cap, which fits over the outer end of the valve K and is provided with an
annular passage-way into which extends the exhaust pipe M. The central
passage-way k of the valve K leads through an extension stem K to which a pipe N
is suitably connected by a union coupling. O is a pinion secured on the stem K¹
and P is a lever, which is provided with an internal quadrant p, and is suitably
pivoted on the bed-plate E. When the handle of the lever P is vertical the steam
is cut-off. When thrown into the position shown in the drawing the engine rotates
in the direction indicated by arrow. When thrown in the opposite direction the
valve is thrown so that a passage-way 2 communicates with the upper portion of
the annular passage-way and the passage-way communicates with the lower
port J.
In this latter position of course the piston ring and shaft will be caused
to rotate in the opposite direction to that indicated by arrow.
In the construction of the engine above described it will be perfectly steam tight,
may be readily reversed, and there is no back pressure. The wings as they are
caused to revolve extend more and more as they recede from the port out from the
ing piston and consequently present a greater surface for the steam to act upon
end also have a greater leverage as they pass farther away from the centre of the
shaft. This increased leverage is practically exerted throughout nearly the entire
revolution as when one wing has passed beyond the vertical line through the
eccentric pin the other one has reached it again.
In our construction it will also be seen that the full force of the steam is being
continuously exerted upon the wings as they are caused to rotate.
In order to provide for the perfect utilization of the steam both as to the inlet
and outlet ports we provide concentric passage-ways J extending from near the
centre of the casing at the side of the chamber 1) between the ports and reaching
on each side to points on the periphery of the inner chamber at which the wings
are shown in the drawing. It will thus be seen that the steam will be continuously
exerted on the preceding wing until the succeeding wing, in rotating passes this
point, so that the steam is exerted on the greatest possible surface of the wing at
the beginning of its utilization. It also follows from this that as soon as the steam
has started to drive the wing the steam of the opposite wing will commence to

page_text: exhaust immediately from the opposite concentric passage-way J². The advan-
tages of the construction shown will, therefore, be apparent.
Although we show rollers through which the wings extend it will be noticed
that we might use rollers on each side of the wings in suitable recesses.
Again we might find it preferable to journal the inner ends of the wings upon
ball bearings supported on the eccentrically placed pin c.
We may also state that the ends of the wings would be provided with suitable
packing as indicated.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
1. na rotary engine the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates
secured to each side thereof a pin located eccentrically to the shaft and secured on
the opposite side to that on which the shaft is connected, a chamber in the casing
concentric the pin and against which the ring piston abuts at one side, wings
journalled on the pin and extending through slots in the ring piston into the con-
centric chamber and inlet anu exhaust ports located on each side of the portion of
the ring piston, which abuts the inner periphery of the chamber as and for the
purpose specified.
2. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same, concentric to the shaft, a suitable casing, the disc plates secured
to each side thereof, a pin located eccentrically to the shaft and secured on the
opposite side to that on which the shaft is connected, a chamber in the casing
concentric to the pin, a recess between the ports concentric to the ring piston and
in which it fits, wings journalled on the pin and extending through slots in the
ring piston into the concentric chamber and inlet and exhaust ports located on
each side of the portion of the ring piston, which abuts the inner periphery of
the chamber as and for the purpose specified.
3. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured to
each side thereof, a pin located eccentrically to the shaft and secured on the
opposite side to that on which the shaft is connected, a chamber in the casing
concentric to the pin and against which the ring piston abuts at one side, and
spring-held packing situated between the norts and abutting against the ring
piston, wings journalled on the pin and extending through slots in the ring
piston into the concentric chamber and inlet and exhaust ports located on each
side of the portion of the ring piston, which abuts the inner periphery of the
chamber as and for the purpose specified.
ou
4. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured to
each side thereof, a pin located eccentrically to the shaft and secured
the opposite side to that on which the shaft is connected, a chamber
in the casing concentric to the pin and against which the ring piston abuts at one
side, a plate abutting the ring piston provided with a central aperture, wings
journalled on the pin and extending through slots in the ring piston into the
concentric chamber, and inlet and exhaust ports located at each side of the por-
tion of the ring piston, which abuts the inner periphery of the chamber as and for
the purpose specified.
5. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured
to each side thereof, a pin located eccentrically to the shaft and secured on the
opposite side to that on which the shaft is connected, a chamber in the casing
concentric to the pin and against which the ring piston abuts at one side, a
plate abutting the ring piston provided with a central aperture, ring packing
located in the edges of the central portion of the casing and abutting the inner

page_text: plates, wings journalled on the pin and extending through slots in the ring piston
into the concentric chamber and inlet and exhaust ports located at each side of
the portion of the ring piston, which abuts the inner periphery of the chamber as
and for the purpose specified.
6. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates
secured to each side thereof, a pin located eccentrically to the shaft and secured
on the opposite side to that on which the shaft is connected, a chamber in the
casing concentric to the pin and against which the ring piston abuts at one side,
wings journalled on the pin and extending through slots in the ring piston into the
concentric chamber side packing for the wings and inlet and exhaust ports located
on each side of the portion of the ring piston, which abuts the inner periphery as
and for the purpose specified.
7. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured
to each side thereof, a pin located eccentrically to the shaft and secured on the
opposite to that on which the shaft is connected, a chamber in the casing con-
centric to the pin and against which the ring piston abuts at one side, wings
journalled on the pin, slots in the ring piston, rollers located in the slots and
journalled at the ends in the rotating plates of the casing through which the wings
extend into the concentric chamber and inlet and exhaust ports located on each side
of the portion of the ring piston which abuts the centre of the chamber as and
for the purpose specified.
8. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured to
each side thereof, a pin located eccentrically to the shaft and secured on the
opposite side to that on which the shaft is connected, a chamber in the casing
concentric to the pin and against which the ring piston abuts at one side, wings
journalled on the pin, slots in the ring piston, rollers located in the slots and
journalled at the ends in the rotating plates of the casing through which the wings
extend into the concentric chamber, side packing for the wings, and inlet and
exhaust ports located on each side of the portion of the ring piston, which abuts
the inner periphery of the chamber as and for the purpose specified.
9. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured
to each side thereof, a pin located eccentrically to the shaft and secured on the
opposite side to that on which shaft is connected, a chamber in the casing con-
centric to the pin and against which the ring piston abuts at one side, wings
journalled on the pin and extending through slots in the ring piston into the
concentric chamber, inlet and exhaust ports located on each side of the portion
of the ring piston, which abuts the inner periphery of the chamber, an extension
in portion of the casing, a valve journalled in same and provided with inlet port
and outlet ports designed to register with the ports in the casing and means for
reversing the position of these ports as, and for the purpose specified.
10. In a rotary engine, the main driving shaft, the end disc and ring piston
secured to same concentric to the shaft, a suitable casing, the disc plates secured
to each side thereof, a nin located eccentrically to the shaft and secured on the
opposite side to that on which the shaft is connected, a chamber in the casing con-
centric to the pin and against which the ring piston abuts at one side, wings
journalled on the pin and extending through slots in the ring piston into the
concentric chamber, inlet and exhaust ports located on each side of the portion of
the ring piston which abuts the inner periphery of the chamber, an extension to
the central portion of the casing, the valve journalled in same and provided with
inlet port and outlet ports designed to register with the ports in the casing, a cap
for the valve, an annular passage-way communicating with the outlet port and
means for reversing the position of the ports as and for the purpose specified.
11. In a rotary engine the main driving shaft, the end disc and ring piston

page_text: secured to same concentric to the shaft, a suitable casing the disc plates secured
to each side thereof, a pin located eccentrically to the shaft and secured on the
opposite side to that on which the shaft is connected, a chamber in the casing
concentric to the pin and against which the ring piston abuts at one side, wings
journalled on the pin and extending through slots in the ring piston into the
concentric chamber, inlet and exhaust ports located on each side of the portion of
the ring piston which abuts the inner periphery of the chamber and concentric
passage-ways formed in the periphery of the chamber and extending on each side
of the ports as and for the purpose specified.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.