Improvements in Rotary Engines.
Year: 1894

page_text: Date of Application, 14th Mar., 1894
Complete Specification Left, 13th Dec., 1:94-Accepted, 2nd Mar., 1895
Improvements in Rotary Engines.
1, ANDREW PAUL of the Firm of Matthew Paul & Company, Engineers in
the Town and County of Dumbarton do hereby declare the nature of this
invention to be as follows :-
:-
This invention relates to rotary engines of the type described in the Specification
of Letters Patent granted to Alexander Francis Garden Brown No. 12915 of 1892
and it has for its object to simplify and otherwise improve the construction and
operation of such engines.
Under the invention in lieu of the abutment described in the Specification
above referred to I employ a sliding shutter having a saddle end resting on the
rotating piston and having its stem housed in a cylindrical or segmental boss
adapted to oscillate in a cylindrical or like casing formed or fitted above or at
one side of the engine cylinder. A steam chest is formed on this casing and
through it is carried a steam admission port which on the oscillation of the boss
is alternately opened and closed to a passage through the boss and through or
alongside the stem of the sliding shutter leading into the cylinder. As the piston
revolves the boss oscillates to cover and uncover the steam admission port whilst
the shutter has a sliding motion within the boss which carries the end of the
steam passage in the shutter over the inner edge of the boss so as to open and
close the steam passage at the proper time, the shutter acting as a species of
slide valve whilst the oscillating boss acts as an oscillating valve. An exhaust
port is provided in the cylinder and may communicate with the atmosphere or
a condenser or in the case of a multiple expansion engine with the valve chest
of an adjoining cylinder.
When the engine is made to reverse the exhaust port is carried through the
Oscillating boss.
When two or more impulses are to be imparted to the piston during each
revolution a corresponding number of sliding shutters and oscillating valve bosses
are provided around the cylinder.
Dated this 13th day of March 1894.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
Improvements in Rotary Engines.
I, ANDREW PAUL, of the Firm of Matthew Paul & Company, Engineers, in
the Town and County of Dumbarton, 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 of the type described in the Specification
of Letters Patent granted to Alexander Francis Garden Brown No. 12915 of 1892,
and it has for its object to simplify and otherwise improve the construction and
operation of such engines.

page_text: The invention is illustrated on the accompanying drawings in vertical transverse
section at Figure 1, in longitudinal section at Figure 2, and in detail at Figure 3.
In lieu of the abutment described in the Specification above referred to I employ
a sliding shutter A having a saddle end B resting on the rotating piston C and
having its stem housed in a cylindrical or segmental boss D adapted to oscillate in
a cylindrical or like casing E formed or fitted above or at one side of the engine
cylinder F. A steam chest G is formed on this casing E and through it is carried
one or more steam admission ports e, which on the oscillation of the boss D is or
are alternately opened and closed to a passage or passages d through the boss and
to a passage a through or alongside the stem of the sliding shutter A leading into
the cylinder F. As the piston C revolves the boss D is oscillated either by the
action of the sliding shutter A or by the combined action of the shutter and a
fork H which may or may not be fixed to the boss D its other end embracing an
eccentric I secured on the shaft J as shewn to cover and uncover the steam
admission ports d in said boss whilst the shutter A has a backward and forward
sliding motion within the boss D which carries the end of the steam passage
the shutter A alternately over the inner edge of the boss D so as to open and close
the steam passage at the proper time, the shutter A acting as a species of slide
valve whilst the oscillating boss D acts as an oscillating valve. An exhaust
port K is provided in the cylinder F and may communicate with the atmosphere or
a condenser, or in the case of a multiple expansion engine with the valve chest of
an adjoining cylinder.
in
When two or more impulses are to be imparted to the piston during each
revolution a corresponding number of sliding shutters and oscillating valve bosses
are provided around the cylinder.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. A rotary engine the parts of which are constructed combined and arranged
to operate substantially as described with reference to the annexed drawings.
2. In a rotary engine the combination with the rotating piston of the sliding
shutter having a saddle end resting thereon and having its stem housed in a boss
adapted to oscillate within the steam chest or casing the shutter and boss acting
as the steam distributing valves, substantially as described.
Dated 12th day of December 1894.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62, St. Vincent Street, Glasgow, Agent for the Applicant.