Improvements in Gas or on Motor Engines.
Year: 1895

page_text: Date of Application, 5th Jan., 1895
Complete Specification Left, 2nd Oct., 1895-Accepted, 2nd Nov.,
1895
Improvements in Gas or on Motor Engines.
1, HERBERT ALFRED HUMPHREY, of West View, Winnington Northwich in
the County of Cheshire, Engineer, do hereby declare the nature of this invention
to be as follows:-
:-
My invention relates to a simple construction of a gas or oil motor engine
whereby I obtain economy and efficiency of action.
For this purpose I pump
the charge, consisting of gas or oil vapour mixed with
air, all under pressure, into a chamber between two pistons which are rigidly
connected together so as to constitute a slide valve and in this chamber, which is
cooled by a water jacket, when the two pistons are in such a position that they
cover a port from the pump and a port to the working cylinder, I ignite the
mixture. The pistons are then moved in one direction, so uncovering the ports
that the combustion gases enter the working cylinder expanding therein and
propelling its piston, and the pump, the piston of which moves with the main
piston, draws in a fresh charge. When the main aud pump pistons have completed
their outstroke, the slide valve is moved so as to open the cylinder port to exhaust,
and also a discharge valve is opened from the combustion chamber through which
a current of air is caused to pass in such a manner as to clear out the combustion
gases and fill the chamber with air, whereupon the chamber is again charged with
combustible mixture, and the action is repeated.
By adding a second larger working cylinder and a third piston to the two which
form the valve, so as to govern its port, the engine can be worked as a compound
engine, the exhaust from the first working cylinder passing into the second larger
cylinder and operating therein on its piston, which is linked to a crank opposite to
that for the piston of the first cylinder.
For working and pump pistons reciprocating rectilineally in cylinders may be
substituted pistons rotating, or partly rotating to and fro.
Dated this 5th day of January 1895.
ABEL & IMRAY,
Agents for the Applicant.
тиргоѵешение ш 239
1, HERBERT ALFRED HUMPHREY, of West View, Winnington, Northwich, in
the County of Cheshire, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described aud
ascertained in and by the following statement:—
My invention relates to a simple construction of a gas or oil motor engine
whereby I obtain economy and efficiency of action, as I shall describe referring to
the accompanying drawings.
Fig. 1 is a longitudinal and Fig. 2 a transverse section of the valve and com-
bustion chamber of an engine according to my invention, of which Fig. 3 is a
sectional plan

page_text: Fig. 4 is a sectional plan of a modification by which the engine is adapted to
work as a compound engine.
Referring first to Figs. 1, 2 and 3, A is the working cylinder of a gas or oil
motor engine having its piston connected to a crank C, and B is a pump cylinder
having its piston worked from a crank C" which is on the same shaft with C and
coincides with it in position. Both cylinders communicate by ports a and b with
a valve and combustion chamber E, in cylindrical portions of which the piston
valves D and F, rigidly connected together are caused to reciprocate by suitable
gear worked from a cam on the engine shaft or its equivalent. Near one end of
the chamber E is an inlet I for a mixture of air with gas or oil vapour, and at the
other end there is an outlet O for discharge of exhaust. In the middle of the
chamber there is a partition P on each side of which is a check valve V and V¹,
the one covering a passage from an air pump or fan, the other covering an outlet.
Both these valves are worked by suitable gear from the engine shaft.
The chamber E is preferably kept cool by water circulating in a jacket W from
inlet w to outlet w¹. Water may also circulate through the valves D F and their
rod, the valves being in that case made hollow, and a tubular rod being led through
a stuffing box at the left end of the valve chamber.
The engine operates in the following manner.
When the valves F D are in the position shewn, the space in E between them
contains high pressure combustion gases. The valves F being then moved to the
left so as to put port 6 in communication with I, and to put a in communication
with the space in E between the valves, the high pressure gases expanding from E
into the cylinder A propel its piston, at the same time the piston of B making
its outstroke draws in by ports I and 6 a mixture of air and gas and finally air.
The
The valves F D then being moved back to the position shewn closing a and b the
valves V Vare opened and a current of air is forced through E sweeping out
residuary products of combustion from the space between D and F.
valves V V being then closed and the valves F D being moved to the right so as
to put port 6 in communication with the space in E between the valves, and to
put a in communication with O, the pistons are caused, by the momentum of the
flywheel, to make their instrokes, the piston of B forcing mixed air and gas into E
to mix with the air already there and compressing the whole, while the piston
of A discharges exhaust through a and O.
The valves F D being again moved to the position shewn, the gaseous mixture
in E is fired, by electricity or by an ignition tube L or otherwise so that the
space between the valves contains high pressure combustion gases, whereupon the
action is repeated.
As shewn in Fig. 4, the cylinder A is made smaller, and another larger
cylinder G is provided having its piston connected to a crank C2 opposite the
cranks C C. The valve rod is also extended to the left connecting to a third
piston valve H which governs a port g to cylinder G and the outlet port O. The
operation is the same as that above described so far as regards the pump B and
cylinder A which in this case constitutes a high pressure cylinder, but the gases,
after performing work in A, instead of directly escaping as exhaust, pass first by a
and into the larger cylinder G and expand therein, performing farther work, and
finally escape at O.
The additional piston valve H and the ports g and o are arranged, relatively to
the other pistons and ports, suitably for this cycle of operations.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A gas or oil motor engine wherein a working cylinder and a pump, having
their pistons connected to cranks on one shaft communicate with a combustion
chamber and respectively with an inlet and a outlet port as determined by piston
valves caused by the engine to reciprocate in the chamber which is also provided

page_text: with a pair of check valves, all arranged and operating substantially as
described.
2. In combination with the parts referred to in the preceding claim, an additional
cylinder and piston valve arranged so that the engine operates as a compound
engine, substantially as described.
11
2008
ABEL & IMRAY,
Agents for the Applicant.