Improvements in Rotary Engines.
Year: 1890

page_text: Date of Application, 20th May, 1890
Complete Specification Left, 19th Feb., 1891-Accepted, 4th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Rotary Engines.
I, GEORGE DANIEL DAVIS, of Garford Street, Poplar, in the County of
Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:--
This invention has reference to improvements in rotary engines especially designed
for use with steam as a motor.
In carrying out my invention I employ a cylinder, centrally through which
passes a shaft carried in suitable bearings attached thereto. On this cylinder is
eccentrically mounted a piston which forms an eccentric and works in contact with
the cylinder at one point. At this point across the piston is provided a sliding part
working in a groove pressed outward by spring pressure so that tight fit and
provision for renewal in case of wear of the part in contact with wall of the
cylinder is attained.
Mounted in a groove or in grooves around the piston is a strap or straps having
a joint-piece or joint-pieces by which they are attached to corresponding joint pieces
at the inner end of a sliding abutment which reciprocates in a suitably formed
chamber so that in the rotation of the piston corresponding movement is given to
the sliding abutment.
The joint pieces are connected together by pin or equivalent connection. The
induction and eduction of steam is controlled by the sliding abutment, the same
forming a valve co-operating with suitable passages for the inlet of steam to the
exhaust, and the valve is balanced by the steam being allowed access to both faces
thereof.
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1800
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Rotary Engines.
I, GEORGE DANIEL DAVIS, of Garford Street, Poplar, in the County of
Middlesex, 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 has reference to improvements in rotary engines especially designed
for use with steam as a motor, but by modification in details it may be adapted to
air, water or gas.
In carrying out my invention I employ a cylinder, centrally through which passes
a shaft, carried in suitable bearings attached thereto. On this shaft is eccentrically
mounted a piston, which forms an eccentric, and works in contact with the cylinder
at one point.
At this point, across the piston, is fitted a part slidden in dovetail grooves or
other suitable retaining parts or placed in a groove, and kept tightly fitting, and
provision is made for renewal in case of wear of the part in contact with the wall of
the cylinder.
Mounted in a groove, or in grooves around the piston, is a strap or straps having
a joint piece or joint-pieces by which they are attached to corresponding joint picces

page_text: at the inner end of a sliding, abutment, which reciprocates in a suitably formed
chamber, so that in the rotation. of the pistou,.corresponding movement is given to
the sliding abutment. The joint-pieces are connected together by pin or equivalent
connection. The induction and eduction of steam is controlled by the sliding abut-
ment, the same forming a valve co-operating with suitable passages for the inlet of
steam to the exhaust, and the valve is..balanced. by, the steam being allowed access
to both faces thereof.
The steam may be taken at any position of the piston, provided the valves are
arranged accordingly.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a vertical section of the apparatus.
Fig. 2 is a sectional view of the same, taken transversely of Fig. 1.
Fig. 3 is an external view of Fig. 1.
Fig. 4 is an exterior view of Fig. 2.
Fig. 5 is a sectional view of the sliding valve or abutment pièce c, separately, but
with a slight modification in its construction in that the lower part c², are made
removable so that they may be removed to compensate for any wear that may take
place between it and the rotating piston and preferably I locate springs as c³ in
a recess in each of these parts c² to keep the same pressed to the part h.
Fig. 6 is an external side view of Fig. 5.
Fig. 7 is a plan view, and
Fig. 8 a side view of the movable piece f
a indicates the circular cylinder, centrally of which are formed bearings a', in
which rotates the axis b', of the circular rotating part b, carried eccentrically on
that axis. c is a sliding valve or abutment, which slides in the chamber d', formed
for it on the upper part of the casing d. Around the central portion of the rotating
piston b, is formed a groove, leaving an eccentric axis 62, around which is applied,
and rotates, a strap or ring e (Fig. 1) which is connected to the sliding valve or
abutment c, by means of the link or connection e', secured to the part c, by the
pin e², passing through the parts e¹ and c.
G₂
and
Steam being supplied from the supply port to the interior c', of the valve
thence to the interior of the cylinder a², the rotating piston b is caused to revolve
on its axis 6', and the steam escapes by the exhaust port d³. f is a part of the wall
of the valve-chamber, made moveable in the grooves f¹, and kept to its work against
the lower face of the valve c, on which the greatest pressure comes, by means of a
spring, contained in the removable chamber f³ provided for it. For convenience
of construction and application, the strap e, and connecting limb e', may be formed
in two parts or half straps see Figs. 9 and 10 so as to be applied on opposite sides of
their axis b², and be held together by the pin e² at one end, and by the pin e³ or like
connection at the opposite end, whilst correct adjustment is further secured by the
cross pin fixed in the one half strap passing into a recess in the corresponding
other half strap. d² is the inlet port for steam, and d³ is the outlet port for the
same.
Fig. 11 is a side view with the outside plate or cover removed of a modification
of the arrangements shewn by Fig. 1 but otherwise generally conforming to the
arrangement therein shewn. In this view the straps or rings e are arranged at the
outer edges of the rotating part 6 in recesses formed therein, instead of being centrally
located. This arrangement is designed to simplify renewal in case of wear of the
parts e as the cover d on either side need only be removed to expose the part e and
permit its removal.
↑
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a rotatory engine a rotating niston a cylinder therefor in combination with a

page_text: sliding abutment or valve reciprocating in a suitable valve chamber, said valve and
rotating piston being connected by a strap or straps and connecting piece substan-
tially as and for the purpose set forth.
2. In a rotatory engine an eccentric piston rotating in a cylindrical chamber
co-operating with a sliding valve or abutment reciprocating in a suitable chamber,
said piston and valve being connected by a strap or straps, suitable ports and
packing pieces, all arranged and operating substantially as described.
3. In a rotatory engine consisting essentially of a case containing a cylinder a
central axis whereon is mounted an eccentric piston the periphery of which comes
in contact with said cylinder at one point a reciprocating valve sliding in a suitable
chamber and abutting against the periphery of the eccentric valve and being kept
in contact therewith by a strap or straps formed in one or in parts and secured to
the eccentric piston and valve by suitable pins or connections and packed thereto if
desired all substantially as set forth.
Dated the 19th day of February 1891.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.