Improvements in was mo
Year: 1887

page_text: Date of Application, 29th Aug., 1887
Complete Left, 29th May, 1888
Complete Accepted, 6th July, 1888
Improvements in was mo
I, DENIS EMBLETON, of the Yorkshire Foundry, Black Bull Street, Hunslet,
Leeds, in the County of York, Engineer, do hereby declare the nature of this
invention to be as follows :-
My invention has reference to a construction of gas engine in which there is an
explosion at every revolution or alternate stroke, and in which there is admitted to
the cylinder through a hole or radial holes uncovered by the piston as it approaches
the termination of its outward stroke a scavenging charge of air and afterwards a
combustible mixture of gas or vapour and air and the contents of the cylinder are
compressed on the inward stroke, during which also products of combustion and air
are expelled through the inner end of the cylinder, so that on the conclusion of the
inward stroke, there is, enclosed within a chamber at the inner end of the cylinder,
and which may advantageously be of larger diameter than the working cylinder, a
practically homogeneous compressed charge of combustible mixture which is ignited
by a suitable igniter, and so exploded and expanded as to propel the piston outward
until it uncovers the before mentioned hole or holes, whereby air is admitted first, and
afterwards a further charge of combustible mixture as before which is compressed on
the return stroke during which the products of combustion from the above mentioned
explosion as also air admitted as aforesaid are expelled and so on at each revolution
or double stroke of the engine. In my engine the chamber into which the
combustible mixture is compressed preparatory to ignition, and which I will call for
distinction the ignition chamber, is not made long and of a gradually diminishing
diameter but is made short in proportion to the stroke of the piston, and of uniform
diameter whether such diameter be the same as that of the working cylinder or not.
Satisfactory results may be obtained by the use of an ignition chamber having a
cubical capacity of from about one fifth to one fourth that of the working cylinder.
Means are or may be provided to ensure thorough admixture of air and gas
or vapour prior to entering into the working cylinder.
1007
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: Improvements in Gas Motor Engines.
I, DENIS EMBLETON of The Yorkshire Foundry, Black Bull Street, Hunslet,
Leeds in the County of York Engineer do hereby declare the nature of this invention,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
My invention has reference to an improved construction of gas engine of a type
described in the specification of Patent No. 24478 in which there is an explosion at.
overy revolution or alternate stroke, and in which there is admitted to the cylinder
through a hole or radial holes uncovered by the piston as it approaches the termination
of its outward stroke a scavinging charge of air and afterwards a combustible
mixture of gas or vapour and air and the contents of the cylinder are compressed on
the inward stroke, during which also products of combustion and air are expelled
through the inner end of the cylinder, so that on the conclusion of the inward stroke,
there is, enclosed within a chamber at the inner end of the cylinder, and which may
advantageously be of larger diameter than the working cylinder, a practically
homogeneous compressed charge of combustible mixture which is ignited by a suitable
igniter and so exploded and expanded as to propel the piston outward until it
uncovers the before mentioned hole or holes, whereby air is admitted first and
afterwards a further charge of combustible mixture as before which is compressed on
the return stroke during which the products of combustion from the above mentioned
explosion as also air admitted as aforesaid are expelled and so on at each revolution or
double stroke of the engine. In my engine the chamber into which the combustible
mixture is compressed preparatory to ignition and which I will call for distinction
the ignition chamber is not made long and of a gradually diminishing diameter but is
made short in proportion to the stroke of the piston, and of uniform diameter whether
such diameter be the same as that of the working cylinder or not. Satisfactory
results may be obtained by the use of an ignition chamber having a cubical capacity
of from about one fifth to one fourth that of the working cylinder. Means are or may
be provide to ensure thorough admixture of air and gas or vapour prior to entering
into the working cylinder.
Referring to the annexed two sheets of illustrative drawings Figure 1 is a plan,
partly in section, of a portion of a gas motor engine according to my invention.
Figure 2 is an end elevation of the sainc. Figure 3 is a cross section through the
cylinder and mixing chamber and Figure 4 is a side elevation through the forward
end of the cylinder and the mixing chamber the walls being shewn in dotted section.

page_text: In these views there is not shewn a complete gas engine but only so much of one as
is necessary to illustrate my invention.
1 is the cylinder having in it the piston 2 to which is pivotted the connecting
rod 3. At the rear end of the cylinder is the ignition chamber 4, which in the
drawings is shewn of slightly larger diameter than the cylinder. A water jacket 5
surrounds the working cylinder for the greater part of its length, but not the ignition
chamber, which is encircled with an annulus or ring 6 of non-conducting substance
such as air, asbestos or silicate cotton.
At the forward end of the cylinder there is a mixing chamber 7. This chamber
communicates with the interior of the cylinder by a number of holes 8, which are
uncovered by the piston shortly before the latter reaches the end of its
outward stroke. These holes are (as shewn) of various diameters and arranged
at various angles to the corresponding radii of the cylinder, the object
being to make the distribution of the incoming fluid as perfect as possible.
The mixing chamber 7 is in communication, by the pipes 9 and 10 with the gas
pump 11 and the air pump 12. The gas pump is operated by a rod 13 worked by a
cam on the eccentric shaft, or in any other convenient manner.
The air pump is
operated by a connecting rod from a crank or eccentric on the crank shaft.
14 is the exhaust valve. It is held closed by the spring 15 and the rocking
lever 16 until the appropriate moment when it is opened by the rod 17 which is
worked by a cam or eccentric on the crank shaft.
18 is the ignition apparatus of the well known form in which an iron tube is kept
hot by a constant flame. 20 is the eccentric rod for opening the igniter-valve at the
proper time.
The method of operation is as follows.--Supposing the piston to be in the position
shewn in Figure 1, and to have a compressed combustible charge behind it, this
charge is ignited and the piston is propelled outwards by its expansion, communicating
motion to the crank shaft in the usual way. Shortly before the piston reaches the end of
its stroke it passes over the holes 8 (Figure 3) which form a communication between
the interior of the cylinder and the mixing chamber 7. At the same moment that
these holes are uncovered the exhaust valve 14 is opened. Air from the pump 12
flows through the holes 8 driving the products of combustion before it through the
exhaust valve 14. The gas pump 11 then makes its stroke delivering a measured
quantity of gas into the mixing chamber, and this quantity enters the cylinder with
the air. The combustible charge is swept backward by the return stroke of the
piston forcing the scavenger charge before it until the exhaust is closed.
contents of the cylinder are then compressed into the ignition chamber, the walls of
which are kept exceedingly hot by the nonconducting jacket around them. The heat
of the charge, due to the compression, is increased by heat acquired from the walls of
the chamber, and in this way the pressure is augmented. The charge is then ignited
and the cycle commences afresh.
The
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that I do not
claim as of my invention in a gas engine in which the piston is propelled outward by
explosion and expansion of a combustible mixture of gas or vapour and air behind
it: causing (a) the exhaust to be opened and air alone to be forced into the cylinder
through holes, uncovered by the piston before it has completed its outward stroke, (6)
combustible mixture to be forced into the cylinder through the said holes, after the
piston has completed its outward stroke and whilst it is making the earlier part of
its inward stroke (c) expulsion of remaining residue and of air during such inward
stroke, and (d) closing of the exhaust and compression by the piston of the
combustible mixture, preparatory to ignition and explosion for the next outward
stroke. Nor do I claim a mixing chamber in connection with the gas supply pump
and air supply pump and having openings therefrom into the working cylinder, the
construction and arrangement being such that gas or vapour and air are forced into
the said chamber and mixed preparatory to entering the working cylinder through

page_text: the said openings. Nor do I claim broadly constructing a gas engine with an
ignition chamber short in proportion to the stroke of the piston, of uniform diameter,
and surrounded with a non-conducting jacket; but what I do claim is :
(1) In a gas motor engine of the kind and working on the cycle indicated above, the
use of an ignition chamber formed as described with reference to and illustrated in
the drawing annexed,
(2) In a gas motor engine such as referred to in the preceding claim forming the
holes 8 that establish communication between the interior of the cylinder and the
mixing chamber 7 of different diameters and arranging them substantially in
the manner described and shewn in the drawings.
Lun was
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.