IMPROVEMENTS IN ROTARY GAS ENGINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We THOMAS HENRY JOHNS and WILLIAM ALBERT JOHNS both of Clapton
London in the County of Middlesex Tin Plate Manufacturers do hereby declare
the nature of the said invention for "IMPROVEMENTS IN ROTARY GAS ENGINES"
to be as follows:-
This invention relates to certain improvements in rotary gas Engines.
To carry those improvements into practice I construct a cylinder arranged in
two separate portions nearly double I shaped through the centre of which is n
shaft, the said shaft carrying a thin disc having projections which fill up the entire
space of the greater part of the cylinder: The aforesaid projections may have
metallic packing as found necessary. I employ at the extremo diameter of the
aforesaid cylinder a cylindrical chamber which is also enclosed at both ends, but
has a shaft through its centre, which shaft carries a segment or segments thereupon.
I further place a suitable pump which may be driven by means of an excentric
secured upon the shaft for the purpose of compressing and delivering the gas and
air between the front part of the segment and the back part of the projection as
required, and upon this pump or at any other convenient position between the
pump and the cylinder I provide a suitable valve through which the compressed
charge of gas and air has to pass before entering the cylinder: I place on either
side of the aforesaid cylinder in addition to the above a valve of any suitable form
for the purpose of igniting the charge within the cylinder.
I may further add that I may quite as conveniently use a flap valve placed on
the outer part of the large portion of the cylinder which would fill up the entire
space occupied by the revolving projection in which instance the explosion would
take place between the flap when down and the projection referred to.
I so construct the aforesaid cylinder that a water space can be arranged where
required and an intermediate chamber can also be arranged between the cylinder
and the pump.

page_text: We THOMAS HENRY JOHNS and WILLIAM ALBERT JOINS, both of No 22 Rushmore
Road, Clapton London, in the County of Middlesex, Tin Plate manufacturers do
hereby declare the nature of our invention for IMPROVEMENTS IN ROTARY GAS
ENGINES 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 certain improvements in rotary gas Engines.
To carry those improvements into practice we construct a cylinder, through the
centro of which is a shaft,-the said shaft carrying a thin disc or drum having pro-
jections which fill up the entire space of the greater part of the cylinder. The
aforesaid projections may have metallic packing as found necessary.
We employ at the extreme diameter of the aforesaid cylinder an annular chamber
which is also enclosed at both ends but has a shaft through which shaft carries a
segment or segments thereupon.
We further place a suitable pump which may be driven by means of an excentric
secured upon the shaft for the purpose of compressing and delivering the gas and
air between the front part of the segment and the back part of the projector as
required, and upon this pump or at any other convenient position between the
pump and the cylinder we provide a suitable valve through which the compressed
charge of gas and air has to pass before entering the Cylinder.
We place on either side of the aforesaid cylinder in addition to the above a valvo
of any suitable form for the purpose of igniting the charge within the cylinder.
We may further add that we may quite as conveniently use a flap valve placed
on the outer part of the large portion of the cylinder which would fill up the
entire space occupied by the revolving projection, in which instance the explosion
would take place between the flap when down and the projection referred to.
We so construct the aforesaid cylinder that a water space can be arranged when
required and an intermediate chamber can also be arranged betweon the cylinder
and the pump.
We also provide an enclosed furnace either stationary or moveable, or chamber,
with one or moro jets entered therein so as to heat the contents sufficiently to
ignite the gas and air in the cylinder.
This furnace or chamber las an opening or valve on the top for the purpose of
admitting air to the jets in the furnace at the bottom before the engine is started
so as to heat up the contents sufficiently, which opening or valve is closed after the
engine is started.
We employ in this furnace or chamber coiled copper wire, asbestos or any other
suitable material.
The valve j in Fig. 1 is to admit air when the flap e moves to fill the space in
the cylinder, and when the flap moves backwards, tho air escapes into the cylinder
through corresponding openings which are in the flup and cylinder, so as to scour
the cylinder after each stroke.

page_text: In order that our said Invention may be more fully understood we shall proceed
to describe the same, and for that purpose shall refer to the several Figures on the
drawings:-
Fig. 1. is a cross section.
Fig. 2. is an end elevation and section of pump.
Fig. 3. is a side elevation and section of delivering valve from-pump.
Fig. 4. is an end elevation with valve gearing.
FIG. 4.
a. a. is the Bed which carries the cylinder.
b. b. is the valve gearing.
g. g. is the pillow block which carries the valve gearing.
... are the cams which move the valve gearing.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed we declare that what
we claim is.
1st In combination with a hollow cylinder, a piston with a fixed projection and
oscillating segment or flap as herein before described and illustrated by the accom-
panying drawings.
2nd in combination with a rotary piston, a compressing pump and mixing
chamber as herein before described and illustrated in the drawings.

page_text: 3rd The valve gear operated upon by cams as herein before described and illus-
trated in the drawings.
4th An enclosed furnace or chamber either moveable or stationary with one or
more jets entered therein so as to heat the contents sufficiently to ignite the gas
and air in the cylinder.