IMPROVEMENTS IN ROTARY ENGINES OR PUMPS
Year: 1885

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I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN ROTARY ENGINES OR 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 relates to rotary engines or pumps and consists partly in the
combination of the outer case, provided with oppositely located concave abutments,
with a rotary head having radial chambers and with reciprocating pistons therein,
curved on their outer faces to fit the concaved surface of one of the abutments
during the revolution of the chambered head, whereby the revolution of the head
and pistons, within the outer case, may be practically effected without clearance
waste.
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It also partly consists in the combination of the outer case provided with
oppositely located concave abutments, with a rotary head having radial chambers
provided with reciprocating pistons; a fixed excentrically located wrist-pin ;
and means for connecting the pistons to the wrist-pin, as hereinafter fully set
forth.
In the accompanying drawing,
Figure 1 is a vertical axial section of a rotary engine or pump constructed
according to this invention.
Figure 2 is a transverse vertical section of the same.
Figure 3 is a horizontal section on the line x, x, Figure 2.
Figure 4 is a vertical central section of a modified form of engine, or pump.
Figure 5, is a transverse vertical section of the same, with a portion of the
rotary head broken away to show the engagement of the gear wheels.
In Figures 1, 2 and 3, A is the outer case of the rotary engine or pump, to the
opposite sides of which are secured the removable heads B, B¹. The head B is
I Prins 1

page_text: provided with a central hub a, adapted to form a bearing for the shaft C, and the
head B' is provided with a short inwardly directed hub b, having at one side an
inwardly projecting excentric hub c, to which is secured the wrist-pin c¹.
The rotary head D is firmly secured to the inner end of the shaft C by means of
the inwardly directed hub d of the head; and the piston chambers e, e, e are made
to extend radially from the periphery of the head to the central chamber e of the
same. The rotary head D is also made to have a bearing upon the hub b of the
removable head B¹.
Within the radial chambers e, e, e, are placed the closely fitting pistons E, E, E,
recessed at their backs in order to receive the outer ends of the connecting rods f,
which are pivotted to the said pistons by means of the pins g.
The inner ends of the connecting rods f, are loosely held upon the excentrically
located wrist-pin c¹.
The case A is provided with the openings h and i, and also with the curved
passages or chambers j and k, which extend on opposite sides between the abut-
ments F and F¹.
The curved face 7 of each of the abutments, is made to closely fit the periphery
of the head D, and is also made to slightly exceed one sixth of the circumference
of the said head, while the opening formed by the chambers e in the periphery of
the head D, is preferably made equal to sixty degrees.
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Whenever steam or other fluid under pressure is admitted to the chamber or
passage through the opening h, the resulting pressure upon the curved face of tho
highest piston E, operating obliquely against the stationary excentric wrist-pin c¹
by means of the connecting rod f, will cause the head D to revolve in the direction
of the arrow, in Figure 2; the pressure exerting fluid, (upon the revolution of the
head and consequent outward movement of the previously depressed piston)
passing off through the opening 2. The pistons E, which are curved on their
faces m to fit the curved face of the abutment F1, will be forced, by means of the
excentrically located wrist-pin c¹, into close proximity to the concave face of the
abutment F, on the upward movement of the piston with the revolving head.
The head D may thus be caused to revolve under the pressure of steam, without
clearance waste, which is a great desideratum in such engines.
A modification of my invention is shown in Figures 4 and 5, in which the
rotary head D is provided with four piston chambers e, the abutments F, F¹ being
made slightly wider on their faces than one eighth of the circumference of the
head D, the extent of the opening of the chambers e, in the line of the circum-
ference of the head, being preferably made equal to forty five degrees.
The shaft C is made continuous through the rotary head D, as shown in Figure 4,
and to the removable head B of the case A, is secured the stationary gear wheel 'n,
which is loosely mounted on the shaft C.
The shafts o, o, o, o which pass through suitable bearings in the inwardly
projecting portion p of the rotary head D, are provided at their inner ends with
the cranks q, from which connection is made to the pistons E by means of the
connecting rods f.
Upon the outer ends of the shafts o, is secured the gear wheel r, made equal in
size to the stationary gear wheel n, and engaging with the same; so that the
reciprocating movement of the pistons will cause a continuous rotary movement of
the head D, the curvature of the face of the piston permitting the same to revolve
between the concave abutments F, F', without clearance waste of steam or other
fluid.
In employing my improvement as a pump, rotary movement is imparted to the
shaft C from any available source of power, the fluid to be raised by the action of
the pump being drawn in at one of the openings in the outer case, and 'discharged
through the other. When properly constructed the same machine is adapted for
use, both as an engine or as a pump, as desired.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed as communicated to
me by my foreign Correspondent I declare that what I claim is
First. In a rotary engine or pump, the combination of the opposite concave abut-
ments, with the rotary chambered head, and the reciprocating pistons curved on
their outer faces, substantially as, and for the purpose, specified.
Second. In a rotary engine or pump, the combination of the opposite concave
abutments, the rotary chambered head, the stationary excentrically located wrist-
pin, and the pistons, curved on their outer faces and connected to the wrist-pin,
substantially as described.
HASELTIŅE, LAKE & Co.,
For the Applicant.