Improvements in Rotary Engines and Pumps,
Year: 1898

page_text: Date of Application, 23rd Aug., 1990
Complete Specification Left, 9th June, 1899-Accepted, 22nd July, 1899
Date of Application, 23rd Aug., 1090
Complete Specification Left, 9th June, 1899-Accepted, 22nd July, 1899
TRUVIDIONAL DIECITICATION.
Improvements in Rotary Engines and Pumps,
We, AUGUSTE EUGENE LÉON DECAT, Accountant, and LEOPOLD FRANCOIS
BRASSEUR, Clerk, both of Fontaine l'Evêque, Belgium, do hereby declare the
nature of this invention to be as follows:-
1
This invention relates to rotary engines, and its object is to provide an engine
which may be used either as a steam or fluid pressure motor, or, by providing
it with the necessary piping and external power for rotating it; as a suction and
forcing pump
The improved engine consists mainly of a rotary drum, mounted eccentrically
in a cylinder, and provided with two movable slides placed at right angles to
each other and controlled as to position, by the internal surface of the said con-
taining cylinder, the arrangement being such as to cause the slides one after the
other, to present varying portions of their surfaces to the action of the motive
fluid introduced into the drum cylinder through suitably disposed ports:
There is also provided an external cylinder arranged concentrically with the
drum and composed of two or several parts, the whole traversed longitudinally
by a shaft carrying the said drum. The drum-containing cylinder is arranged
in such a manner as to be tangent on the one hand with the drum and on the
other with the external cylinder.
The drum has two slots through the centre at right angles to each other, in
which work two slides equal in length to the diameter of the eccentric cylinder
and extending throughout the length thereof. Both these slides are provided
with spring-controlled bars serving to form tight joints between them and the
internal surface of the cylinder. These slides are formed with apertures at
the centre of the drum so as to enable them to be arranged cross-wise and work
at right angles to each other, for which purpose one of them is constructed in
two parts connected together by a screw-bolt.
The drum is provided at each end of the inner cylinder with a collar or flange
fitting a recess formed between the eccentric cylinder and the heads of the outer
cylinder and each of these flanges is furnished with a piston ring forming a tight
joint with the internal surface of the outer cylinder.
This outer cylinder is provided with two chambers having inlet tubes for ad-
mission and exhaust, and a number of openings or ports in the body of the
cylinder which form communication between the said chambers and the interior
of the eccentric cylinder.
The motive fluid, steam for example, entering through one of the tubes into the
corresponding chamber flows through the openings or ports into the eccentric
cylinder, and acts against one of the slides then protruding from the drum and
in contact with the eccentric cylinder, so causing the drum to rotate.
!
This latter revolves with it the slides which causes their successive displacement
as they move over the surface of the eccentric cylinder. After having turned
for about a quarter of a revolution the working surface of the slide first acted

page_text: upon by the steam, decreases while another slide, meanwhile advanced to a position
for the steam to act upon it, projects from the drum to nearly its full extent. The
steam filling the space between these two slides then escapes through the open-
ings or ports and a chamber arranged at the opposite side to that for admission.
The direction of rotation of the drum and consequently of its shaft depends
upon the direction of admission of the motive fluid.
The position of the slides must necessarily be regulated by the internal surface
of the eccentric cylinder and each of them is in turn submitted during a quarter
of a revolution to the action of the steam or fluid; the pressure of which upon the
two opposite faces of one slide is balanced by the effective pressure upon the next
alide.
If the engine, instead of being in communication with a steam generator, be
connected to pipings for water or gas and its shaft then rotated by any appropri-
ate external means each of the slides on the drum in the eccentric cylinder will
be caused to draw in a quantity of water or gas through one of the admission
tubes, and then eject the 'same through the other tube. The apparatus therefore
in this case acts as a suction and forcing pump.
The drum may be constructed in one piece but in order to facilitate its con-
struction it may be composed of several parts say four segments secured together
by screw-bolts the slides in such case being provided with suitable recesses or
cavities to permit of their movement without hindrance from such bolts.
If the apparatus is intended for use as a motor it may be advantageous to
provide also a number of openings or ports in the upper portion of the eccentric
cylinder and to permit steam to enter the central space between the two cylinders
through another inlet for the purpose of enabling it to act on the drum at that
point and so reduce to a minimum the friction at that part in the engine, which
friction would otherwise be increased in proportion to the pressure exerted by
live-steam on the lower part of the drum.
The engine may obviously be worked by means of any other appropriate
medium forming motive power and it may furthermore be provided with several
cylinders arranged to act either as a double or compound engine, or as an engine
with multiple expansion.
T
1
1
1000
Improvements in Rotary Engines and Pumps.
We, AUGUSTE EUGÈNE LÉON DECAT, Accountant, and LÉOPOLD FRANÇOIS
BRASSEUR, Clerk, both of Fontaine l'Evêque, Belgium, 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 to rotary engines, and its object is to provide an engine
which may be used either as a steam or fluid pressure motor, or, by providing
it with the necessary piping and external power for rotating it, as a suction and
forcing pump.
1
The improved engine consists mainly of a rotary drum, mounted eccentrically
in a cylinder, and provided with two movable slides placed at right angles to
each other and controlled as to position, by the internal surface of the said con-
taining cylinder, the arrangement being such as to cause the slides one after the

page_text: other, to present varying portions of their surfaces to the action of the motive
fluid introduced into the drum cylinder through suitably disposed ports.
The accompanying drawings illustrate an engine constructed in accordance
with this invention.
Fig. 1 is a plan. Fig. 2 is a longitudinal section on line A-B of Fig. 1.
Fig. 3 is a transverse section on line C-D of Fig. 1. Fig. 4 is a transverse
section of a slightly modified construction, and Figs. 5 and 6 are details.
e is the rotary drum mounted eccentrically in the cylinder d, and there is also
provided an external cylinder a arranged concentrically with the drum c and coni-
posed of two or several parts, the whole traversed longitudinally by a shaft b
carrying the said drum c. The drum-containing cylinder d is arranged in such a
manner as to be tangent on the one hand with the drum c and on the other with
the external cylinder «.
The drum has two slots through the centre at right angles to each other, in
which work two slides e e¹ equal in length to the diameter of the eccentric
cylinder and extending throughout the length thereof: Both these slides e e
are provided with spring-controlled bars f serving to form tight joints between
then and the internal surface of the cylinder d. These slides are formed with
apertures at the centre of the drum so as to enable them to be arranged cross-
wise and work at right angles to each other, for which purpose one of them is
constructed in two parts connected together by a screw-bolt m.
The drum e, Figs. 2, 5 and 6 is provided at each end of the inner cylinder d
with a collar or flange e fitting a recess formed between the eccentric cylinder d
and the heads of the outer cylinder a and each of these flanges is furnished with
a piston ring j forming a tight joint with the internal surface of the outer
cylinder a.
This outer cylinder is provided with two chambers h having inlet tubes i for
admission and exhaust, and a number of openings or ports in the body of the
cylinder which form communication between the said chambers h and the interior
of the eccentric cylinder d.
C
The motive fluid, steam for example, entering through one of the tubes i
into the corresponding chamber h flows through the openings or ports o into the
eccentric cylinder d, and acts against one of the slides e then protruding from the
drum c and in contact with the eccentric cylinder d, so causing the drum to rotate.
This latter revolves with it the slides ee which are consequently successively
displaced as they move over the surface of the eccentric cylinder d. After having
turned for about a quarter of a revolution the working surface of the slide first
acted upon by the steam, decreases while another slide, meanwhile advanced
to a position for the steam to act upon it, projects from the drum to nearly its
full extent. The steam filling the space between these two slides then escapes
through the openings or ports and a chamber arranged at the opposite side
to that for admission.
The direction of rotation of the drum c and consequently of its shaft b depends
upon the direction of admission of the motive fluid.
The position of the slides must necessarily be regulated by the internal surface
of the eccentric cylinder d and each of them is in turn submitted during a quarter
of a revolution to the action of the steam or fluid; the pressure of which upon the
two opposite faces of one slide is balanced by the effective pressure upon the next
slide.
If the engine, instead of being in communication with a steam generator, be
connected to pipings for water or gas and its shaft & then rotated by any appro-
priate external means, each of the slides on the drum in the eccentric cylinder d
will be caused to draw in a quantity of water or gas through one of the admission
tubes and then eject the same through the other tube . The apparatus there-
fore in this case acts as a suction and forcing pump.
The drum may be constructed in one piece, but in order to facilitate its con-
struction it may be composed of several parts, say four segments as shown in

page_text: Fig. 4 secured together by screw-bolts; the slides in such cases being provided
with suitable recesses or cavities to permit of their movement without hindrance
from such bolts.
If the apparatus is intended for use as a motor it may be advantageous to pro-
vide also a number of openings o' o¹ in the wall of the eccentric cylinder d
where it is covered by the central space between the two cylinders and to
permit steam to enter said space ¹ through another inlet for the purpose of
enabling it to act on the drum c at that point and so reduce to a minimum the
friction at that part of the engine, which friction would otherwise be increased in
proportion to the pressure exerted by live-steam on the lower part of the drum c.
The engine may obviously be worked by means of any other appropriate
medium forming motive power and it may furthermore be provided with several
cylinders arranged to act either as a double or compound engine, or as an engine
with multiple expansion.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is
-
1. A rotary engine. also adapted for use as a pump, comprising a rotary drum
provided with vanes or slides arranged at right angles to each other and working
in slots in said drum, and a cylinder disposed eccentrically in regard to said
rotary drum and serving to regulate and adjust the working position of the vanes
in regard to the motive fluid and inlet ports, substantially as described.
2. A rotary engine of the kind described and claimed in Claim 1, having its
cccentric drum-carrying cylinder arranged within an outer cylinder so as to form
a jacket (h) between them, said jacket having an inlet port (such as ¹) and ports
or apertures (o o¹) for admitting fluid pressure to the said rotary drum where
it is in contact with the casing, substantially as and for the purpose set forth.
3. In a rotary engine, a rotary vane-carrying drum provided at each end with
a collar or flange for forming a tight joint between the ends of the eccentric and
outer cylinders, the movable vanes being provided with spring pressed bars
forming a fluid tight joint with the interior of the eccentric drum-containing
cylinder, substantially as set forth.
4. The general arrangement and combination of parts constituting the improved
rotary engine, substantially as herein described in reference to Figs. 1 to 3, sub-
ject to the modifications described in reference to Figs. 4, 5 and 6 of the accom-
panying drawings.