GAS MOTOR ENGINE
Year: 1884

page_text: I, FRANCIS WILLIAM CROSSLEY of Openshaw Manchester in the County of
Lancaster Engineer do hereby declare the nature of my invention for GAS MOTOR
ENGINE to be as follows:-
This invention relates to a construction and arrangement of Gas Motor Engine
in the following manner. The working cylinder in which the combustion of the
inflammable charge takes place, is single acting, fitted with a long piston which
operates as a slide, covering during the greater part of its stroke a lateral
passage to one end of another cylinder parallel to the working cylinder. This
Becond cylinder is fitted with a trunk piston. The front end of the second cylinder
is used as an expansion cylinder; the annular space around the trunk at its rear
end, provided with inlet and outlet valves, operates as an air compressing pump,
and within the trunk or connected to it is arranged a gas pump. The pistons of
the working cylinder and of the second cylinder are connected to cranks on the
flywheel shaft, the crank of the second cylinder being in advance of the crank of
the working cylinder. The front end of the second cylinder is provided with an
exhaust valve worked by the engine. The operation is as follows:-
While the working piston is being propelled forward by the expansion of the
ignited charge, the second piston is also making the latter part of its forward stroke,
expelling exhaust in front of it and drawing air into the annular space behind it
and gas into the gas pump. The second piston, having passed the extreme of its
forward stroke and begun its back stroke, the working piston, still advancing,
uncovers the lateral passage leading to the second cylinder, and a portion of the
contents of the working cylinder pass into the second cylinder and expand therein
propelling the second piston backwards. The working piston, having passed the
extreme of its forward stroke, now returns and closes the lateral passage to the
second cylinder. While the working piston continues its back stroke, the piston of
the second cylinder is reaching the end of its backstroke discharging into the working
cylinder air and gas. This mixture, being in a compressed state when the working
piston has completed its back stroke, is ignited, and the cycle of operation is
completed, and repeated as above described. It is preferred that when the air and
gas are being delivered into the working cylinder, a portion of the air should enter
the cylinder first, this being followed by both air and gas mixing in their common

page_text: passage to the cylinder. In order to determine prior delivery of air, the supply
valve of the gas pump is somewhat throttled or loaded so that, in the back stroke
of the second piston, the air is first raised to the pressure necessary for discharge
into the working cylinder. This valve may be regulated by a governor, the effect
being that the gas pump receives a greater or less charge, but its discharge always
takes place at the end of the stroke, so that, in the passage to the working cylinder
where ignition takes place, there is always a mixture of gas and air suitable for
combustion. Otherwise, for the purpose of regulating the engine, the gas pump may
be made with a certain amount of clearance, and its discharge valve acted on by a
governor cam in a manner similar to that described in the Specification No 2081 of
1876, so that if the valve be opened at all, it is opened for supply of gas during the
last part of the stroke of the pump, the mixture next the ignitor being thus suitablo
for combustion.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.
1

page_text: I, FRANCIS WILLIAM CROSSLEY, of Openshaw, Manchester in the County of
Lancaster, Engineer, do hereby declare the nature of my invention for "GAS MOTOR
ENGINE," 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 a construction and arrangement of Gas Motor Engine
in the following manner. The working cylinder in which the combustion of the
inflammable charge takes place, is single acting, fitted with a long piston which
operates as slide, covering during the greater part of its stroke a lateral passage to
one end of another cylinder parallel to the working cylinder. This second cylinder
is fitted with a trunk piston. The front end of the second cylinder is used as an
expansion cylinder; the annular space around the trunk at its rear end, provided
with inlet and outlet valves, operates as an air compressing pump, and within the
trunk connected to it is arranged a gas pump. The pistons of the working
cylinder and of the second cylinder are connected to cranks on the flywheel shaft,
the crank of the second cylinder being in advance of the crank of the working
cylinder. The front end of the second cylinder is provided with an exhaust valvo
worked by the engine. The operation is as follows:-
While the working piston is being propelled forward by the expansion of the
ignited charge, the second piston is also making the latter part of its forward stroke,
expelling exhaust in front of it and drawing air into the annular space behind it
and gas into the gas pump. The second piston having passed the extreme of its
forward stroke and begun its back stroke, the working piston, still advancing,
uncovers the lateral passage leading to the second cylinder, and a portion of the
contents of the working cylinder pass into the second cylinder and expand therein
propelling the second piston backwards. The working piston, having passed the
extreme of its forward stroke, now returns and closes the lateral passago to tho
second cylinder. While the working piston continues its back stroke, the piston of
the second cylinder is reaching the end of its back stroke discharging into the
working cylinder air and gas. This mixture, being in a compressed state when the
working piston has completed its back stroke, is ignited, and the cycle of operation
is completed, and repeated as above described. It is preferred that when the air
and gas are being delivered into the working cylinder, a portion of the air should
enter the cylinder first, this being followed by both air and gas mixing in their
common passage to the cylinder. In order to determine prior delivery of air, the
supply valve of the gas pump is somewhat throttled or loaded so that in the back
stroke of the second piston, the air is first raised to the pressure necessary for
discharge into the working cylinder. This valve may be regulated by a governor,
the effect being that the gas pump receives a greater or less charge, but its discharge
always takes place at the end of the stroke, so that, in the passage to the working
cylinder where ignition takes place, there is always a mixture of gas and air
suitable for combustion. Otherwise, for the purpose of regulating the engine, the
gas pump may be made with a certain amount of clearance, and its discharge valve
acted on by a governor cam in a manner similar to that described in the Specification
No 2081 of 1876, so that if the valve be opened at all, it is opened for supply
of gas during the last part of the stroke of the pump, the mixture next the igniter
being thus suitable for combustion.

page_text: 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
The construction of Gas Motor Engine, wherein a single acting cylinder in which
combustion of a gaseous charge is effected and which has a long piston acting as a
slide, is combined with a second cylinder, which is differential, operating at its one
end as an expansion cylinder and at its other end as a pump for charging the
combustion cylinder, substantially as described.
Dated this eleventh day of Donamba 1001