COMPOUND GAS MOTOR ENGINE
Year: 1884

page_text: I, HENRY PERCY HOLT of Manchester in the county of Lancaster, Engineer,
do hereby declare the nature of my invention for COMPOUND GAS MOTOR ENGINE"
to be as follows:-
My invention relates to compound gas motor engines in which the gaseous
products of combustion resulting from the ignition of a combustible charge in one
working cylinder are caused to pass thence into a second cylinder in order by their
further expansion to propel a piston therein.
According to my present invention, I effect the communication between the
Igniting Cylinder and the second Expansion Cylinder by means of a part or
passage situated at such a position in the Igniting Cylinder as to be uncovered by
the piston when at about two-thirds of its out or propelling stroke. The products
of combustion are thus allowed to pass at that point of the Igniting Cylinder's
stroke into the second Expansion Cylinder, the piston of which is just commencing
its outstroke, during which it is propelled by the expansion of the gases ignited in
the cylinder in any known manner. This expansion continues until the piston
of the igniting cylinder has nearly completed its outstroke and the piston of the
second expansion cylinder has performed about one half of its out or propelling
stroke, at which point it is made momentarily to uncover a port or passage leading
into the atmosphere. This port may have a valve which is momentarily opened,
50 as to allow the expanded gases to escape until the pressure in both cylinders is
reduced to about that of the atmosphere. The said port is then again closed,
either by a part of the piston passing over it or otherwise, whereupon the con-
tinued outward motion of the second expansion piston will produce a partial
vacuum in both cylinders which will cause the next combustible charge to be
drawn into the igniting cylinder, such charge being then compressed by tho
return stroke of the piston of the igniting cylinder preparatory to ignition. On
the return stroke of the piston of the second expansion cylinder, the air and gases
contained therein are expelled through a second exhaust port provided with a
valve or slide at the bottom of the cylinder.
By the arrangement described two impulses are given to the fly wheel in each
revolution.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: CUTLEIE
DRECIFICATION,
I, HENRY PERCY HOLT of Manchester in the county of Lancaster, Engineer,
do hereby declare the nature of my invention for "COMPOUND 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 :-
My invention relates to compound gas motor engines in which the gaseous
products of combustion resulting from the ignition of a combustible charge in one
working cylinder are caused to pass thence into a second cylinder in order by their
further expansion to propel a piston therein.
According to my present invention, I effect the communication between the igniting
cylinder and the second expansion cylinder by means of a port or passage situated
at such a position in the igniting cylinder as to be uncovered by the piston when
at about two-thirds of its out or propelling stroke. The products of combustion
are thus allowed to pass at that point of the igniting cylinder's stroke into the
second Expansion Cylinder, the piston of which is just commencing its outstroke,
during which it is propelled by the expansion of the gases ignited in the cylinder
in any known manner. This expansion continues until the piston of the igniting
cylinder has nearly completed its outstroke and the piston of the second expansion
cylinder has performed about one half of its out or propelling stroke, at which
point it is made momentarily to uncover à port or passage leading into the
atmosphere. This port may have a valve which is momentarily opened, so as to
allow the expanded gases to escape until the pressure in both cylinders is reduced
to about that of the atmosphere.
The said port is then again closed either by a part of the piston passing over it
or otherwise whereupon the continued outward motion of the second expansion
piston will produce a partial vacuum in both cylinders which will cause the next
combustible charge to be drawn into the igniting cylinder, such charge being then
compressed by the return stroke of the piston of the. igniting cylinder preparatory
to ignition. On the return stroke of the piston of the second expansion cylinder
the air and gases contained therein are expelled through a second exhaust port
provided with a valve or slide at the bottom of the cylinder.
By the arrangement described, two impulses are given to the flywheel in each
revolution.
Fig 1 is a plan partly in section of a compound gas motor engine according to
my invention, fig. 2 is a longitudinal section taken on the line X X of fig. 1, and
fig. 3 is a transverse section on Y Y A is the high pressure or ignition cylinder
and B is the low pressure or expansion cylinder communicating with A by the
passage C which is uncovered by a the piston of A at about two thirds of its
outstroke. D is a port or passage leading to the atmosphere from the expansion
cylinder B, which the piston b thereof uncovers when it is about half way in its
outstroke, the communication being effected through a passage E in the expansion
piston b. F is the main exhaust valve from the expansion cylinder B worked by
a cam or eccentric, G and H are the gas and air supply valves to the high pressure
cylinder A which may be worked as shewn from the same lever as that which

page_text: .
works F. The igniter I is, as shewn, of the known heated tube kind, but it might
be otherwise arranged. The two pistons a and b being connected as shewn to
cranks on the fly wheel shaft, the action is as follows. While a is being propelled
by the expansion of the ignited charge behind it, b is expelling products of com-
bustion by the exhaust valve F then opens. As 6 approaches the end of its
instroke, Fis closed and the remaining contents of B are compressed. Thereupon
a uncovering the port C, a portion of the high pressure contents of A pass into B
and expand therein propelling boutwards. When b has thus made about half of
its outstroke a having just passed its outcentre, the passage E uncovering the
port D, a portion of the contents of B can escape and thereafter the port D being
again closed, the piston b, in completing its outstroke, tends to create behind it a
partial vacuum in both cylinders A and B, and the valves G and H being then
open, a charge of gas and air is drawn into A. This charge is compressed by the
continued instroke of a, after it passes the port C, the piston b being at this time
making its instroke expelling the products of the previous combustion by the
valve F. The compressed charge in A being ignited the action is repeated.
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 and arrangement of compound gas motor engine, substantially
as herein described, and illustrated by the drawings.
Duted VIIIS zoon day or repruury 1000.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.