IMPROVEMENTS IN ROTARY GAS ENGINES AND OTHER ROTARY MOTORS
Year: 1884

page_text: PROVISIONAL-SPECIFICATION.
WO THOMAS HENRY JOHNS and WILLIAM ALBERT JOHNS both of Clapton,
London, in the County of Middlesex Tin Plate Manufacturers do hereby declaro
the nature of the said invention for " IMPROVEMENTS IN ROTARY GAS ENGINES
AND OTHER ROTARY MOTORS" to be as follows:-
·
This invention relates to certain improvements in rotary gas engines parts of
which are applicable to other similar motors arranged to be driven by steam water
or other fluid..
In carrying out these improvements I proposo to construct a cylinder having an
annular chamber or water jacket formed around its outer circumferance and within
which cylinder rotatos excentrically a cylindrical drum or piston secured upon a
shaft extending through the said cylinder.
Upon this cylindrical drum or piston is a hinged flap so arranged as to con-
tinually bear upon the inner face of the cylinder. I also provide a suitable pump
which may be driven by means of an excentric secured upon the shaft for the
purpose of compressing and delivering the charge of gas and air into the cylinder
as required and upon this pump or at any other convenient position between the
pump and the cylinder I provide a weighted valve through which the compressed
charge of gas and air has to pass before entering the cylinder..
In addition to the above I further arrange a valve for the purpose of igniting
the charge within the cylinder. This valve I prefer to make of a hollow cylindrical
form so arranged as to work within a second cylinder attached to or formed upon
the outer circumference of the main cylinder. Within this valve is a jet supplied
with gas by means of a pipe entering through the centre of the valve at its end.
Immediately over this or at any other suitable position is a second jet connected
direct with the gas supply.. A rocking motion is imparted to this valve by means
of an excentric or cam secured upon the shaft.
In operation the action is as follows:-The ignition jet having first been lighted
the cylindrical drum or piston is caused to revolve whereupon a charge of gas and
air is immediately drawn into the pump whence it issues in a compressed state to
the cylinder behind the hinged flap whilst this is taking place the slide jet is first
ignited by the jet above and then caused to partly revolve so as to direct its flame
through a suitable opening into the cylinder and thus ignite the charge within.
a

page_text: COMPLETE SPECIFICATION.
We THOMAS HENRY JOHNS and WILLIAM ALBERT JOHNS, both of No 22 Rush-
more 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 OTHER ROTARY MOTORS 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, parts of
which aro applicable to other similar motors arranged to be driven by steam, water
or other fluid.
In carrying out these improvements we propose to construct a cylinder having
an annular chamber or water jacket formed around its outer circumference and
within which cylinder rotates excentrically a cylindrical drum or piston secured
upon a shaft extending through the said cylinder.
Upon this cylindrical drum or piston is a hinged flap so arranged as to continually
bear upon the inner face of the cylinder.
We also provide a suitable pump which may be driven by means of an excentric
Recurod upon the shaft for the purpose of compressing and delivering the charge of
gas and air into the cylinder as required, and upon this pump or at any other
convenient position between the pump and the cylinder we provide a weighted
valve through which the compressed charge of gas and air has to pass before
entoring the cylinder.
In addition to the above wo further arrange a valve for the purpose of igniting
the charge within tho cylinder.
This valve we prefer to make of a hollow cylindrical form so arranged as to work
within a second cylinder attached to or formed upon the outer circumference of the
main cylinder.
Within this valve is a jet supplied with gas by means of a pipe entering through
the centre of the valve at its end.
At the end of this jet in the hollow part of the valve we place coiled wire or
other suitable material, so that when heated by the gas jet this wire will maintain
its heat and cause an ignition cach revolution when opposite the passage in the
cylinder.—the gas used for this purpose is mixed with a proportionate quantity of
air so as to cause greater heat.
Immediately over this at any other suitable position is a second jet connected
direct with the gas supply.
A rocking motion is imparted to the valve by means of an excentric or cam
securod upon the shaft..
In operation the action is as follows:-The ignition and jet having first been
lighted the cylindrical drum or piston is caused to revolve whereupon a charge of
gas and air is immediately drawn into the pump whence it issues in a compressed
state to the cylinder behind the hinged flap; whilst this is taking place the slide
jet is first ignited by the jet above and then caused to partly revolve so as to direct
its flame through a suitable opening into the cylinder and thus ignito the chargo
within.

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 the bed plato
a. is the gas valve
is the connecting rod of pump
c. is the connecting rod from gas valve to Governor
d. is the connecting rod of igniting valve
e. is the lever connected with Governor and gas valve
f. is the Governor
g.
is the excentric for pump
h. is the excentric for igniting valve
i. is the excentric for Governor
j. is the guide for excentric rod
k. is the end of cylinder
1. is the oil cup for cylinder
n. is a slot which guides the cross bar connected to the pump.-the
pump is not shown on the drawing.
Fig. 9. is the Fly Wheel.
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
ve claim is
1st In combination with the cylinder, a hollow drum or piston carrying upon its
outer surface a hinged flap as herein described and shown on the drawings.
2nd A hollow cylindrical igniting valvo as hereinbefore described and illustrated
n the drawings.
3rd The inlet gas valve as herein before described and illustrated in the
drawings.
4th Coiled wire or other suitable material in the hollow part of the ignition
valve as herein before described and illustrated in the drawings.
THOMAS HENRY JOHNS.
WILLIAM A. JOHNS.