IMPROVEMENTS IN ENGINES WORKED BY GAS OR VAPOUR
Year: 1884

page_text: We WILLIAM HILL and JOHN HAUGHTON HILL both of the Walmgate Iron
Works in the City and County of York Mechanical Engineers do hereby declare
the nature of said invention for "IMPROVEMENTS IN ENGINES WORKED BY GAS OR
VAPOUR" to be as follows:-
The object of this invention is to improve the construction and action of
engines worked by gas or vapour. We provide the cylinder with a jacket having
internal ribs for giving increased cooling surface in which jacket air is caused to
circulate or pass in a circuitous manner between the said ribs for the purpose of
keeping the cylinder cool. The jacket is fitted with a cylindrical valve worked
from a cam or eccentric for admitting the air and gas to the cylinder from a mixing
chamber in the said cylindrical valve and for opening the exhaust the whole or
part of which passes into a pipe for taking the warm air from the air jacket.
The mixing chamber in the cylindrical valve has a wedge shaped part against
the side of which the incoming air impinges and is directed upwards towards the
apex where it meets the gas coming in a direction against the apex. The gas and
air thus become properly mixed, pro lucing a superior uniform explosive mixture
which flows off laterally. Both the air and the gas are drawn in through small
or narrow apertures to split up the currents, and first pass through a rubber
disc valve and then through a light steel valve, so that the flame from the
explosion does not in any way injure the rubber. By letting in the exhaust on the
induced current principle we produce a partial vacuum in the air jacket and an
indraught of air. For igniting the mixture we employ a slide valve which is
worked from a cam in such manner that it uncovers an aperture at the proper
moment and then closes immediately, the return being made after the piston has
moved back again over the inlet; by this means we always have an indraw so that
the stationary flame is not blown out as heretofore usual. We produce an
explosion at each outstroke of the engine.
Dated this Seventeenth day of March 1884.

page_text: COMPLETE SPECIFICATION.
We, WILLIAM HILL and JOHN HAUGHTON HILL both of the Walmgate Iron
Works in the City and County of York Mechanical Engineers do hereby declare
the nature of said "Invention for "IMPROVEMENTS IN ENGINES WORKED BY GAS
OR VAPOUR" and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:—
The object of this Invention is to improve the construction and action of
engines worked by gas or vapour. We provide the cylinder with a jacket having
internal ribs for giving increased cooling surface in which jacket air is caused to
circulate or pass in a circuitous' inanner between the said ribs for the purpose of
keeping the cylinder cool. The jacket is fitted with a cylindrical valve worked
from a cam or eccentric for admitting the air and gas to the cylinder from a mixing
chamber in the said cylindrical valve and for opening the exhaust the whole or
part of which passes into a pipe for taking the warm air from the air jacket.
The mixing chamber in the cylindrical valve has a wedge shaped part against
the side of which the incoming air impinges and is directed upwards towards the
apex where it meets the gas coming in a direction against the apex. The gas and
air thus become properly mixed, producing a superior uniform explosive mixture
which flows off, laterally. Both the air and the gas are drawn in through small
or narrow apertures to split up the currents, and first pass through a rubber
disc valve and then through a light steel valve so that the flame from the
explosion does not in any way injure the rubber. By letting in the exhaust on
the induced current principle we produce a partial vacuum in the air jacket and an
in draught of air. For igniting the mixture we employ a slide valve which is
worked from a can in such manner that it uncovers an aperture at the proper
moment and then closes immediately, the return being made after the piston has
moved back again over the inlet; by this means we always have an indraw so that
the stationary flame is not blown out as heretofore usual.
We produce an explosion at each outstroke of the engine.
And in order that this our invention may be more fully understood and readily
carried into effect we will describe the same with reference to the accompanying
drawings of which Figure 1 is a part sectional plan of the cylinder and adjoining
valve box parts for a horizontally arranged gas engine, Figure 2 a vertical cross
section on line X.X Figure 1, and Figure 3 a vertical section through the cylinder.
The cylinder A is provided with a jacket having internal ribs 1 for giving
increased cooling surface and forming passages through which air is caused to
circulate or pass in a circuitous manner between the said ribs as indicated by
Figures 2 and 3. On the side of the jacket, as in this instance arranged is provided
or fitted a cylindrical valve B which receives motion from a cam eccentric or crank,
not shown in the drawings, and serves to admit air and gas to the cylinder, from a
mixing chamber 2 formed in the valve plug and for opening and closing for the
exhaust or spent gases from the cylinder the whole or part of which exhaust passes
into a pipe C Figures 1 and 2 inserted in the pipe D; this latter forms the outlet for
the air which after having been admitted at Al has circulated in the cylinder jacket
and which in consequence has become warmed. By thus admitting the exhaust
into the pipe D on the induced current principle we produce a partial vacuum in
the air jacket and an indraught of air and a rapid circulation, so that the number
of the circulating passages may be greater and the cylinder be kept cooler, than if
the air were simply allowed to flow into the jacket by reason of the difference of
temperature of the air at the inlet and outlet.
The mixing chamber 2 in the cylindrical valve B has a wedge shaped part 3
against the side of which the air impinges which comes from the air supply pipe 4
and which is needed for the explosive mixture. By this impinging against the
side as shown by the arrow it is directed upwards, as indicated by the arrow,

page_text: towards the apex, where it meets the gas which comes from the gas supply pipe 5
in a direction against the apex of the wedge as shown by the dart. The gas and
air thus become properly and as it were instantaneously mixed producing a superior
uniform explosive mixture which flows off laterally. The gas is drawn in through
small or narrow apertures 5 to split up the current, and first passes from the
gas supply pipe E through the rubber disc valve F which is fixed by a central bolt
to a grid with suitable openings 8 through, and then through the light steel lift
valve G, which latter serves to protect the rubber valve F so that the flame from
the explosion does not in any way injure the rubber. The air is drawn in through
the rubber valve H, which is fixed by a central bolt to a grid with suitable
openings 9 and then through the light steel valve I which serves to protect the
rubber and then through small openings leading to the valve B. For igniting the
explosive mixture we employ the slide valve K which is worked from a cam in
such a manner that it uncovers the aperture or port 6 at the proper moment and
then closes immediately, the return being made after piston has moved back again
over the inlet; by this means we always have an indraw and the stationary flame
from the burner L is not blown out as heretofore usual. O is the exhaust port in
the valve B.
We produce an explosion at each outstroke of the engine, which works as
follows.
When the piston is at the bottom or at the end of the instroke the circular
valve B is about to open communication between the port 7 leading to bottom end
of cylinder and the mixing chamber 2 in the valve B; the communication is kept
open until the piston reaches about the line B B Figure 1 when the ignition port 6
is uncovered and the flame from the burner L drawn into the port 6 thus lighting
the explosive charge. The pressure produced impels the piston towards the
crank shaft and the expansion of the products of combustion causes the piston
to complete its outstroke the momentuin of the fly wheel carries the crank over
the centre and produces the back or instroke whereby the products of combustion
are expelled through the port 7 the valve B having now opened communication
between the port 7 and the exhaust pipe C through the port O in the valve B.
The piston then commences its next outstroke as before.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed We declare that what
we claim is ;-
First Cooling the cylinder of a gas engine by circulating air in passages
formed in a jacket round the cylinder, the air being induced by the exhaust
substantially as and for the purposes set forth.
Second The mixing chamber 2 in the valve B into which small streams of
the air and of the gas commingle impinging respectively against the side and the
apex of a wedge shaped part of the chamber, thus forming a suitable explosive
mixture.
Third-The rubber valve F and steel valve G for gas admission.
Fourth-The rubber valve H and steel valve I for air admission.
Fifth The cylinder A having ports as described in combination with the
valve B having gas and air admission ports, and with the ignition slide K with
burner L all operating substantially in the manner described.
Dated this Seventeenth day of December 1901