Improvements in and relating to Gas Motor Engines.
Year: 1890

page_text: Date of Application, 13th Aug., 1890
Complete Specification Left, 13th May, 1891-Accepted, 13th June, 1801
PROVISIONAL, SPECIFICATION.
Improvements in and relating to Gas Motor Engines.
We, GEORGE MCGEE and PETER BURT both of Henrietta Street, Glasgow
in the County of Lanark, Scotland, Engineers do hereby declare the nature of this
invention to be as follows:-
This invention relates to improvements in gas motor engines, and comprises
antipulsators or means for preventing the inhalations of engine from affecting the
pressure of gas in neighbouring pipes; also governors and starting gear, and mode
of renewing hot pipes thereon.
The antipulsator according to this invention comprises the ordinary reservoir
bag or other equivalent receptacle the gas to and from which alternately flows by
the same pipe or channel. The gas inlet pipe is connected to the engine and
normally is open to and leads into the flow pipe to bag but when the engine is
about to inhale the gas, the inlet pipe is shut off by a valve or other equivalent
device operated by the engine, and the motor charge inhaled from the bag through
the flow pipe.
The governor as constructed according to this invention comprises an oscillating
lever actuated by a cam on engine shaft or equivalent thereto. On the other end
of said lever is a pin and disc or wheel which is moved transversely against a spring
by coming against a coned stud. According to the speed of the engine the spring
returns the stud disc to opposite or not the valve spindle, so as to open or not gas
supply valve.
The starting gear as constructed in accordance with this invention comprises
an ordinary air-tight chamber or tank for containing the compressed fluid, and
communicating with the cylinder by a pipe or passage having a check valve
constructed with a passage communicating between both sides thereof which
shall have a stop cock thereon by which the fluid chamber and cylinder can be
put in communication together. To start the engine, the tank being charged, the
crank is merely set over the centre and the valve or cock of pipe from tank opened,
thereby allowing the fluid pressure in tank to act on pistons and drive them
forward.
For facility in renewing the hot igniting pipe, it is made with a flange on bottom
which projects slightly from face of a holder by which it is kept in place and
makes a tight joint with cylinder port, being seated on a piece of asbestos. To
renew the tube the funnel and holder over tube is unbolted, the tube withdrawn
and replaced by a new one and then the whole bolted together again as before.
Dated this 19th low of Anouch 1800
D. F. MASON,
Glasgow, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in and relating to Gas Motor Engines.
We, GEORGE MCGHEE and PETER BURT both of Henrietta Street, Glasgow
in the County of Lanark, 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 in gas motor engines, and comprises
improvements in antipulsators or apparatus for preventing the inhalations of

page_text: engine from affecting the pressure of gas in neighbouring pipes; also in governors
and starting apparatus; and also mode of fixing igniting hot-pipe on engine.
On the annexed drawing
Fig. 1 is a side elevation of an engine cylinders A, B, and part bed C and fitted
with our antipulsator D, governor F, and starting apparatus G;
Fig. 2 is a transverse part section of same;
Fig. 3 is a part sectional plan of the governor, and
Fig. 4 is a part vertical section of the igniting hot-pipe.
The
Like reference letters and numerals on drawings indicate like or similar parts.
The antipulsator according to our invention comprises an ordinary collapsible
reservoir bag or equivalent receptacle (not shown) placed in any convenient
position and connected by a pipe to the flow port 5 of metal case D, the gas to
and from which said bag alternately flows by the same pipe and port 5.
gas inlet pipe is connected to the inlet port 6 of the valve case 1 which case
is fixed to and communicates with an ordinary gas and air mixing case J
fixed to engine. The case D is fitted with a double metal piston valve 7, 8,
fitted on spindle 9. The top of piston valve 7, has a lip 10 which seats air tight on
orifice of valve 7, and the valve spindle 9 is provided at top with a serrated guiding
piston 11 past which the gas can always pass so that the gas inlet valve 8 when
down is open and allows the gas to flow by the flow pipe and port 5 to bag. The
reservoir or bag is thus charged with gas, but when the engine is about to inhale
the gas, the spindle is lifted by a cam or otherwise in usual manner. Thus the
gas valve 8 is first closed thus shutting off the connection between gas supply and
bag, and then the valve 7 between the flow port 5 and gas outlet port 12 opened
whereby the motor charge of gas is inhaled from the bag, thus preventing the
sudden inhalations of gas by engine from affecting the pressure of gas in supply
pipe. When the engine has inhaled the motor charge the spindle 9 lowers thus
shutting the valve 7 and opening the valve 8, thereby allowing the gas to again
charge the bag while the engine is completing its cycle of operations.
The governor as constructed according to this invention comprises an oscillating
lever 14 centred on a stud 15 fixed on side of engine bed C, and oscillated by a cam
(not shown) or other equivalent device on engine, to suit cycle of engine in usual well
known manner.
The back end of lever 14 has a round hole bored therein into
which is fitted a hollow pin or stud 16 which is capable of moving transversely
in said hole, being pushed outwards by a spiral spring 17 placed inside thereof, and
bearing at other end in an adjustable stud 18 screwed into an arm 19 of lever 14.
The pressure of the spring 17 can be varied by screwing in or out the stud 18. Το
the hollow pin 16 is fixed a sharp edged round disc 20 so as to be capable of being
adjusted to present a fresh edge for wear as it gets worn. The stud 16 and disc 20
is driven inwards by coming against an adjustable cone 21 fixed on a depending
rod 22 fixed on engine when the back end of lever 14 is depressed. Assuming the
engine to be going at normal speed; as the back end of lever 14 and arm 19 etc.
is raised, thereby relieving the stud 16 from against fixed cone 21, the spring 17
presses said stud and also disc 20 outwards, so that the disc 20 shall be opposite
end of gas valve spindle 9 which said spindle it comes against and raises, thereby
allowing the gas to be inhaled by engine. Should the engine exceed the pre-
determined speed, the disc 20 rises correspondingly quicker, so that the spring 17
shall not have returned the disc 20 to opposite the foot of valve spindle 9 when
it comes to same level; the disc 20 thus misses and rises past said spindle, thus
not operating gas supply valve, so that the engine does not inhale gas that cycle.
The governor operates by virtue of the disc 20 oscillating synchronously with
the engine speed which may be variable, while the transverse motion of the
disc 20 is constant as adjusted.
The starting gear or apparatus as constructed according to this invention is
especially applicable to that class of gas engines wherein the cylinder air and gas
inlet port is shut off by a piston while the motor charge is being compressed as

page_text: described in British Patent Specification No. 14578%, so that the check valve to
storage tank does not require to be loaded as in other similar starting apparatus
to prevent the motor charge from entering storage tank. Referring to Figs. 1
and 2, the top of the gas and air mixing case or chamber J is formed with a
branch port 26 to which is connected a pipe 27 leading from and connected to
an ordinary airtight storage tank placed conveniently (not shown). The pipe 27
has also another branch leading from and connected to top of aforesaid case J,
which case is fitted air tight at top with a lid 28 having therein a lift check
valve 29 opening only upwards. The pipe 27 has two shut off cocks 31 and 30.
After the engine motor charge has been exploded in the cylinder, the starting
cock 31 being shut and the cock 30 open the storage tank is charged by part of the
combustion products passing from the cylinders past check valve 29 by which it is
retained, and thence to tank in well known manner. To start the engine, the tank
being charged, the crank of engine is set over the centre and the starting cock 31
opened, which allows the fluid pressure in tank to pass through port 26 and thence
into cylinders and act on pistons and drive them forward, the cock 31 being shut at
end of motor piston outstroke. Leakage from tank may be further prevented by
shutting cock 30.
For facility of renewing the igniting hot-pipe of gas engines, as constructed in
accordance with our invention and represented at Fig. 4, the pipe 50 is closed at
top and formed at bottom with an outer flange 51. The pipe is held over the orifice
of igniting port by a metal plate or holder 52 having a centre hole therein being
slipped over the pipe till it bears against the flange 51; the holder being bolted by
holes 53 to engine; an asbestos washer 54 being put under the bottom of pipe 50
so as to make a tight joint. The pipe may be heated in any well known way. To
renew the tube, the holder 52 is unbolted, the tube 50 withdrawn and replaced by
a new one and then the holder 52, tube 50 etc., bolted together again as before.
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 what I
claim is:
1st. In combination with a gas engine, an apparatus whereby the gas from
supply pipe is normally allowed a free passage to the collapsible reservoir only:
but which said passage is shut off simultaneously with the opening of a passage
from said reservoir to gas and air mixing chamber or engine, substantially as and
the purpose hereinbefore set forth and shown.
2nd. In combination with a gas engine collapsible gas reservoir, a gas regulating
valve case D having three ports 6, 5 and 12; a spindle 9 and two valves 7, 8, all
arranged, combined and operating as described and shown.
3rd. A gas engine governor the parts of which are constructed and arranged as
herein described and shown.
4th. The particular combination in the particular manner of parts of starting
apparatus as herein before described and shown on drawing.
5th. The mode of fixing and renewing igniting hot-pipes on gas engines as herein
described and shown at Fig. 4.
Dated this 19th day of May 1891
DAVID F. MASON,
Glasgow, Patent Agent.