A ROTARY ENGINE, APPLICABLE AS A FLUID METER OR PUMP to be as follows
Year: 1885

page_text: We, JAMES BROCKIE of N° 6 Saltoun Road, Brixton in the County of Surrey,
and MATTHEW WILLIAM WALBANK MACKIE of Turk's Head Yard Turninill Street
in the County of Middlesex, Electrical Engineers do hereby declare the nature of
our invention for "A ROTARY ENGINE, APPLICABLE AS A FLUID METER OR PUMP
to be as follows:-
"
Our invention relates to a construction of rotary engine that can be worked by
steam or other fluid under pressure, or can be used as a meter of the fluid passed
through it, or when it is driven by extraneous power it can be used as a pump or
exhauster.
Within a cylindrical casing we fit a cylindrical block free to revolve within the
casing and provided when required with suitable packing to prevent leakage of
fluid at its side or ends. In this block there is a slot extending its whole length
and nearly along its whole diameter, and within this slot, which is virtually the
working cylinder of the engine, is fitted a rectangular piston capable of recipro-
cating to and fro in the line of the diameter, this piston being, if required provided
with packing. Through the piston parallel to the axis of the cylindrical casing
extends a crank pin connecting two discs which are fitted to revolve in recesses in
the ends of the casing, and are fixed on the main shafts of the engine, which
extend outwards at each end. The throw or radius of the crank and the centre
of the crank shafts are so arranged that the axis of the crank pin in its revolution
passes exactly through the axis of the cylindrical casing.
At one side of the casing is an inlet for the working fluid and at the opposite
side is an outlet for its discharge, and through the ends of the slot there are
passages communicating with its interior. As the rectangular piston is caused
by the fluid pressure to travel along the slot in the cylindrical block, the crank
is caused to revolve. Or if the crank be made to revolve by extraneous power, it
will, by causing the rectangular piston to travel to and fro along the slot, make the
apparatus operate as a pump or exhauster. In each revolution of the block there
is a point (when the axis of the crank pin is in coincidence with the axis of the
casing) at which but for the momentum of the revolving block there might be a
tendency of the parts to jam. In order to provide against this we cut at the ends
of the block shallow slots at right angles to the main aperture slot and engage in
these slots short crank pins, which may have antifriction rollers mounted on them.
These acting most effectively while the main crank pin is in the critical position
referred to, obviate all tendency to jamming.
ABEL & IMRAY,
Agents for the Applicants.

page_text: We JAMES BROCKIE of N° 6 Saltoun Road Brixton in the County of Surrey
and MATTHEW WILLIAM WALBANK MACKIE of Turks Head Yard, Turnmill Street
in the County of Middlesex, Electrical Engineers 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 :-
Our invention relates to a construction of rotary engine that can be worked by
steam, or other fluid under pressure, or can be used as a meter of the fluid passed
through it, or when it is driven by extraneous power it can be used as a pump or
exhauster. One form of construction of a rotary engine according to our invention
is shewn in the accompanying drawings Fig. 1 being an end view, Fig. 2 a side
view, one half being a section on X Y, Fig. 3 an end view of the crank discs
and piston block, Fig. 4 a side view of crank discs and main shaft. Within a
cylindrical casing A we fit a cylindrical block B preferably furnished with a
flange C in which are cut the steam and exhaust slots D communicating with the
slot, or cylinder E Fig. 1 and Fig. 2, this cylinder B is free to revolve within the
casing and is provided when required with suitable packing to prevent leakage of
fluid at its sides or ends. In this block there is a slot E E E E extending its
whole length and nearly along its whole diameter, and within this slot, which is
virtually the working cylinder of the engine, is fitted a rectangular piston F
capable of reciprocating to and fro in the line of the diameter X Y, this piston F
being, if required provided with packing. Through the piston parallel to the axis
of the cylindrical casing extends a crank pin G connecting two discs H Fig. 3
which are fitted to revolve in recesses K Fig. 2 in the ends of the casing and are
fixed on the main shafts L of the engine, which extend outwards at each end. The
throw or radius of the crank G and the centre of the crank shafts L are so arranged
that the axis of the crank pin G in its revolution passes exactly through the axis
of the cylindrical casing as shew by the dotted arrows Fig. 1. At one side of the
casing is an inlet for the working steam or fluid M, and at the opposite side is an
outlet for its discharge N, and through the ends of the slot, or cylinder, there are
passages D communicating with its interior. As the rectangular piston is caused
by the fluid pressure to travel along the slot in the cylindrical block, the crank is
caused to revolve, or if the crank be made to revolve by extraneous power, it will,
by causing the rectangular piston to travel to & fro along the slot, make the
apparatus operate as a pump or exhauster. In each revolution of the block F
there is a point 0 (when the axis of the crank pin G is in coincidence with the
axis of the casing) at which but for the momentum of the revolving block B there
might be a tendency of the parts to jam. In order to provide against this we cut
at the ends of the block shallow slots P at right angles to the main aperture slot E
and engage in these slots short crank pins R, which may have anti-friction rollers
mounted on them. These acting most effectively while the main crank pin is in
the critical position referred to obviate all tendency to jamming.
By arranging a double set of ports and exhausts on each side of the centre and
connecting the same with suitable cut off or face valves the engine can be made to
reverse.

page_text: Having thus described the nature of our invention and in what manner the
same is to be performed, we claim :-
A rotary engine constructed of a cylindrical block with a slot and piston fitted
in it, an inlet and outlet for steam, air or other fluid under pressure and encased in
a cylindrical casing.
The adaption of the above engine driven by extraneous power as a pump or
exhauster.
The application of double ports and exhausts for reversing the motion of the
engine. All arranged and operating substantially as herein described.
In witness thereof I the said Matthew William Walbank Mackie have
hereunto set my hand and seal this 19th April 1886.