Improvements in and relating to Gas Motor Engines.
Year: 1891

page_text: Date of Application, 5th Nov., 1891
Complete Specification Left, 5th Aug., 1892-Accepted, 10th Sept.. 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Gas Motor Engines.
We GEORGE MOGHEE and PETER BURT both of Mountblue Engineering
Works, Glasgow, Lanarkshire, Scotland, Engineers, do hereby declare the nature
of this invention to be as follows:-
Our invention relates to improvements for starting gas engines, and to gas engine
antifluctuating devices for preventing the inhalations of engine from much varying
pressure of gas in mains.
the
According to that part of our invention relating to starting engines, we cause or
allow the space or chamber behind the cylinder piston or pistons to be charged with
explosive mixture at atmospheric pressure by means of pinching or moving round
the fly wheel, so as to cause the piston or pistons to inhale the mixture by a special
or the ordinary port or ports during about the first half of the impulse or igniting
stroke. The mixture is fired or ignited by means of a small charge of gunpowder,
percussion cap, detonator, or other equivalent means. This may be effected by a
priming orifice, or an ordinary pistol or revolver. By means of proper gearing the
gas or inlet valve may be made to automatically open to the igniting stroke of
cycle, and the igniting revolver may be similarly actuated, as also by hand.
Otherwise the mixture may be ignited by opening a cock on hot igniting tube so as
to allow the mixture to touch an incandescent part of same; or otherwise, by means
of a naked light placed at orifice of opened pet cock.
According to our present invention the antifluctuating device consists of a
cylindrical or other shaped metal drum or case having on one end thereof the
flexible diaphragm from which is suspended a conical or other throttling valve
working in gas inlet. The inhalations of engine suck the diaphragm inwards which
allows the valve to open. When the gas presses out the diaphragm it shuts the gas
inlet, thus tending to equalise the pressure of gas in mains.
Dated this 3rd day of November 1891.
DAVID F. MASON,
Glasgow, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in and relating to Gas Motor Engines.
We GEORGE M° GHEE and PETER BURT, both of Mountblue Engineering
Works Glasgow, Lanarkshire, Scotland, Engineers, 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 :-
Our said invention relates to improvements for starting gas engines and to
antifluctuating devices for preventing the inhalations of engine from much varying
the pressure of gas in mains.
And in order that the invention may be properly understood, we have appended
an explanatory sheet of drawings whereon
Figs. 1 and 2 are respectively a plan and elevation of one modification, and
Figs. 3 and 5 respectively elevations of other modifications of mechanism connected
with starting.
Fig. 4 is an end view of Fig. 3.

page_text: According to that part of our invention relating to starting engines, we cause or
allow the space or chamber bebind the cylinder piston or pistons to be charged
with explosive mixture at atmospheric pressure by means of pinching or moving
round the fly-wheel so as to cause the piston or pistons to inhale the mixture by a
special or the ordinary inlet port or ports during about the first half of the impulse
or igniting stroke.
This is or may be effected as shown at Figs. 1 and 2 by a spindle or rod 9 which
pushes in and opens the gas supply valve. The outer end of the rod 9 is forked
and slides over engine valve actuating shaft 10 on which is fixed an eccentric 11
having a grooved cam 12 set so as to press the rod 9 inwards during about the first
half of igniting stroke. The disc roller 13 is fixed on a stud 15 which slides trans-
versely and turns in rod 9. The roller 13 is normally kept in past cam 12 by the
spring 14 unless when set by hand before setting the engine crank, so as to open
the supply valve to cylinder while setting the crank. When the crank is about half
stroke out the roller 13 is pressed inwards by the spring 14 and the rod 9 is
otherwise regularly actuated during the working of engine.
Figs. 3 and 4 illustrate another modification wherein the gas valve spindle 16 is
lifted in well known way by the governor tongue 17 as the lever 18. 18 is oscillated
on fulcrum 19 on side of engine. On the valve actuating shaft 20 is fixed cams 21
and 22, the cam 21 being set so as to actuate the gas valve during ordinary
charging stroke of cycle and the cam 22 for during the first half of igniting stroke.
Fixed at right angles to and in end of lever 18 is a stud 23 on which slides and
turns a roller 24 which normally is kept opposite cam 21 by the spring 25. In
starting engine; before turning the crank shaft round the first half of ignition
stroke the roller 24 is set under cam 22 so that as the crank shaft is being set, the
cam 22 presses down roller 24 and lever end 18 thus opening gas valve. By
the time said cam 22 has passed roller 24 said roller will be pressed & kept by
spring 25 opposite cam 21 for use in working cycle.
Under another modification there is fitted on the lever 18 Fig. a hook 27 under
which is placed before setting crank shaft, the end of lever 28 which is fulcrumed
on fixed stud 29; the other end 28" of lever being placed under the shoe 30 of gas
valve spindle 16, so that as the hook 27 lowers it cants the lever 28 and raises the
valve spindle 16. When the hook 27 has passed the edge of lever 28 said lever
falls out of gear into the position indicated by dotted lines. The lever 18 is fitted
with a roller 24 and is rocked by the cam 31 which is formed with a recess 32 as
shown, which allows the lever arm 18 to fall into lowest position during the first
half of igniting stroke, so that when the lever 28 is set between the hook 27 and
shoe 30 the gas valve is opened thereby.
When the explosive mixture has been inhaled into the engine and the crank set
at a proper angle the mixture is ignited by opening a cock on hot igniting tube of
engine or putting a naked light to orifice of opened pet cock fitted on cylinder. If
the mixture is slow to ignite, the fly wheel may be slightly pinched back so as to
drive some of the mixture through the hot pipe or pet cock, when it should be
ignited. The piston is thus impelled out the rest of the stroke, and the momentum
of fly-wheel carries the parts through the cycle of operations.
In the foregoing gears the valve actuating shaft revolves at half the rate of the
crank shaft.
Referring to Fig. 7 the improvements in anti-fluctuating devices relates to those
devices consisting of an ordinary cylindrical case a having fixed on one end thereof
the flexible diaphragm b. From said diaphragm is suspended by a chain e over
pulley ga conical weight c working in gas inlet d, thus constituting a throttling
valve. The inhalations of engine suck the diaphragm b inwards which allows the
weight to lower and allow the gas to enter case a. When the gas presses out the
diaphragm it lifts the weight c and throttles the gas inlet thus tending to equalise
the pressure of gas in mains. The gas is drawn from case a by pipe i.
In lieu of foregoing the coned weight or stem c Fig. 8 works in a socket in
piece, the gas being throttled in passage on way from inlet m to case a.
1
This

page_text: modification is very suitable for case a being placed horizontally instead of
vertically as shown at Fig. 7.
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 :
1st. The mode of starting gas engines by turning the crank-shaft and allowing
the explosive mixture to be inhaled by the piston during about the first half of
ignition or impulse stroke, and then firing said mixture by a hot tube or naked
light, substantially as set forth and shown at Figs. 1 to 5.
2nd. The construction, combination and mode of operating the parts of mechanism
for use in starting gas engines, substantially as herein before set forth and shown at
Figs. 1 to 5.
.
3rd. In anti-fluctuating devices, the combination with gas inlet port of the coned
plug or stem c substantially as and for the purpose set forth and shown at Figs. 7
and 8.
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1 1
1000
DAVID F. MASON,
Glasgow, Patent Agent.