Improvements in Gas and other like Engines.
Year: 1898

page_text: Date of Application, 21st Oct., 1898
Complete Specification Left, 22nd June, 1899-Accepted, 22nd July, 1899
Improvements in Gas and other like Engines.
We, GEORG HIRT, of 10, Troststrasse, Nuremberg, in the Kingdom of Bavaria,
and Empire of Germany, Railway Director, and GEORG HORN, of 15, Subzbacker-
strasse, Nuremberg, aforesaid, Mechanic, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in gas engines and other combustion
engines, the object being to construct an engine which will receive an impulse every
revolution, every forward stroke of the piston being effective: by this means the
disadvantages on the four cycle stroke system are obviated and the size of the engine
is reduced.
According to this invention, in the cylinder is a piston connected to the crank
shaft of the engine in the ordinary manner, the cylinder is closed on each end by
covers and is provided with the usual water jacket. The piston is made with a
hollow chamber and has two channels, one of which communicates with the admission
and firing chambers, and the other communicates with the exhaust port. In 'con-
nection with the admission chamber is the inlet valve for admitting the mixture of
gas and air into the cylinder. The inlet valve is controlled by the governor when
the engine is running, or it can be thrown out of gear with the governor and the
valve operated by hand for the purpose of starting or stopping the engine. The
exhaust valve is opened by means of an eccentric and sliding rod on the crank shaft,
the end of the sliding rod bears against one arm of a bell-crank lever, the other
arm of the lever is connected to the valve spindle and has a spring attached to it for
closing the valve as the eccentric pulls the sliding rod away from the bell-crank
lever.
The action of the engine is as follows:-As the piston travels from right to left a
charge of gas and air is admitted through the inlet valve into the cylinder in front
of the piston, and on the return or forward stroke when the piston nears the end of
its stroke, the charge of gas and air are forced into the admission chamber' and
compressed there until the piston reaches the end of its stroke, when one of the
aforesaid channels in the piston comes into communication with the admission
chamber, and the compressed charge of gas and air passes through the channel into
the hollow body of the piston and is conveyed therein to the other end of the
cylinder where the charge escapes through the channel into the firing chamber
where it is fired and the products of combustion pass along the firing chamber to the
back of the piston and give it the impulse for the second forward stroke at the same
time compressing the next charge in front of the piston.
..*
The exhaust valve is opened at about half way in the forward stroke, remaining
open till the end of the stroke, and any of the charge left in the body of the piston
escapes through the channel therein during its passage over the exhaust port. The
products of combustion also escape from the cylinder, the remaining gas at
atmospheric pressure being compressed at the back stroke of the piston; is again
utilized by being mixed with the fresh charge and fired, and so compensates-for
any loss from leakage in the charge brought down in the body of the piston.
077

page_text: It will be seen that the cycle of events is as follows:-In the forward stroke the
charge is fired, and the exhaust is opened, also the fresh charge is compressed in
front of the piston; and in the back stroke the charge is conveyed in the body of
the piston to the firing chamber, and a fresh charge drawn into the cylinder ready
for compression on the forward stroke. It will thus be seen that the piston receives
an impulse every. forward stroke.
Improvements in Gas and other like Engines.
We, GEORG HIRT, of 10, Troststrasse, Nuremberg, in the Kingdom of Bavaria, and
Empire of Germany, Railway Director, and GEORG HORN, of 15, Subzbackerstrasse,
Nuremberg, aforesaid, Mechanic, do hereby declare the nature of this invention and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to improvements in gas engines and other combustion
engines, the object being to construct an engine which will receive an impulse every
revolution, every forward stroke of the piston being effective: by this means the dis-
advantages of the four cycle stroke system are obviated and the size of the engine is
reduced.
Such being the nature and object of our said invention, the following is a complete
description of same, reference being had to the annexed drawings, in which :-
Fig. 1 is a plan view, partly in section, of the improved gas engine.
Figs. 2 and 3 are details shewing the lever which works the gas valve, in two
positions.
According to this invention in the cylinder 1 is a piston 2 connected to the crank
shaft 3 of the engine in the ordinary manner, the cylinder is closed on each end by
covers 4 and 5 and is provided with the usual water jacket 6. The piston 2 is made
with a hollow chamber 7 and has two channels 8 and 9, the channel 8 is for
communication with the admission chamber 10 and the firing chamber 11, and the
channel 9 communicates with the exhaust port 12. In connection with the ad-
mission chamber 10 is the inlet valve 13 for admitting the mixture of gas and air
into the cylinder 1.
The plug 14 of the inlet valve 13 carries two levers 15 and 16, the lever 15 is
secured firmly on the plug 14 and has a handle 17 pivotted on its end, the handle 17
is formed with a stud or projection 18 which engages with a slot 19 in the lever 16.
On starting the engine the handle 17 is brought into the position shewn in Figs. 1
and 3 with the stud or projection 18 locked in the slot 19, the end of the lever 16 is
joined to the ordinary governor by means of a link 20 or by any of the ordinary
methods. The valve 13 is thereby controlled by the governor. When stopping the
engine the handle is pulled out of the slot 19 as shewn in Fig. 2, the lever 16 is then
free to work loosely on the valve stud 14 without moving the same, and the inlet
valve 6 can be closed by hand.
The exhaust valve 21 is opened by means of an eccentric 22 and sliding rod 23,
the end of the sliding rod 23 bears against one arm 24 of a bell-crark lever, the
other arm 25 of the lever is connected to the valve spindle 26 and has a spring 27
attached to it for closing the valve as the eccentric 22 pulls the sliding rod 23 away
from the bell-crank lever.

page_text: The action of the engine is as follows:-As the piston 2 travels from right to left a
charge of gas and air is admitted through the inlet valve 13 into the cylinder 1 in
front of the piston 2, and on the return or forward stroke when the piston nears
the end of its stroke, the charge of gas and air are forced into the admission
chamber 10 and compressed there until the piston reaches the end of its stroke, when
the aforesaid channel 8 in the piston 2 comes into communication with the admission
chamber 10, and the compressed charge of gas and air passes through the channel 8
into the hollow body of the piston 7 and is conveyed therein to the other end of the
cylinder where the charge escapes through the channel 8 into the firing chamber 11
and is there fired. The products of combustion then pass along the firing
chamber 11 to the back of the piston 2 and give it the impulse for the second
forward stroke, at the same time compressing the next charge in front of the
piston.
opened at about half way in the forward stroke,
of the stroke, and any of the charge left in the
body of the piston 2 escapes through the channel 9 therein during its passage
over the exhaust port 12. The products of combustion also escape from the
cylinder 1, the remaining gas at atmospheric pressure is compressed at the back
stroke of the piston 2, and is again utilized by being mixed with the fresh charge
and fired, thereby compensating for any loss from leakage in the charge brought down
in the body of the piston 2.
The exhaust valve 21 is
remaining open till the end
The cycle of events is as follows:-In the forward stroke the charge is fired
and the exhaust is opened, also the fresh charge is compressed in front of the
piston, and in the back stroke the charge is conveyed in the body of the piston
to the firing chamber and a fresh charge drawn into the cylinder ready for com-
pression on the forward stroke. By this means the piston receives an impulse every
forward stroke.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
(1) The general construction, arrangement, and combination of parts constituting
the improved gas or explosion mixture engine illustrated by Fig. 1 of the annexed
drawings and herein fully described.
(2) In a gas or explosive mixture engine a hollow piston having the channel 8
communicating with a gas or explosive mixture supply valve (such as 13) and with
firing chamber 11 and an exit channel 9 communicating with an exhaust valve 21
all in combination and substantially as described herein and illustrated by the annexed
drawings.
(3) The construction, arrangement, and combination of levers illustrated by
Figs. 1, 2 and 3 for operating the valve 13 as herein described and illustrated by the
annexed drawings.
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