pis and
Year: 1887

page_text: Date of Application, 25th July, 1887
Complete Left, 24th Apr., 1888
Complete Accepted, 25th May, 1888
Deer Droughton
hereby declare the nature of this invention to be as follows :-
The first part of my improvements consists of an alteration in the movement of
piston and Slides. In manufacturing Gas Motor Engines according to patent 12318
for the year 1884 taken out by me, the piston is made to travel, as near as possible to
the cylinder cover, for the purpose of thoroughly clearing from the cylinder all the
products after combustion. The smaller slide which controls the supply of gas to the
cylinder is timed to admit no gas, until the piston has travelled one tenth of its out-
stroke, and the larger slide, is timed to cut off the supply and ignite the mixture when
the piston, has travelled five twelths of its outstroke. According to my new mode of
timeing them, a space equal to about one fifth of the piston travel, remains between
the piston and cylinder cover, when the piston is at the end of its instroke. The smaller
slide is timed, to admit gas immediately the piston commences its out stroke, the
larger slide ignites the mixture when the piston has travelled about one third of its
outstroke. Engines made in accordance with the above alterations, work steadier and
give out more power. The second and third parts of my invention are, entire new
manufactures, forming no part whatever of the patent refered to above. The second
part consists in the formation and arrangement of the parts, which constitutes the
governor both of which are applicable to other Gas Motor Engines. The third part
consists in the formation and arrangement of the parts forming the Slide Valve Fig. 1
in the drawings represents a section through slide valve, which is made of four parts
namely the slide seat, the slide, the slide cover, and bottom plate. Fig. 2 is an
elevation of the slide seat Fig. 4 is plan of the same. Fig. 3 is an elevation of the
slide cover. Fig. 5 is plan and elevation of the bottom plate, which to be fixed to the
under side of the slide seat, for the purpose of carying the weight of the slide Fig. 6
is an elevation and plan of the slide-7 represents the passage formed in the slide seat,
which has two entrances or ports marked 7-7, but in larger machines three or more
ports may be inade and yet considered the same port, thes passages lead to the
cylinder 8 is the air passage. 10 is a chamber formed in the slide were the igniteing

page_text: flame burns for the purpose of igniteing the mixture while passing into the cylinder at
port 7. 9 is the gas passage 11 is the passage in the slide, were the gas and air mix
before entering port 7. 12 is the opening in the slide cover, which communicates
with the chimney werein a seccond gas flame burns for the purpose of relighting the
flame in chamber 10 of the slide. 13 are the studs upon which nuts are screwed
against the slide cover for the purpose of holding the surfaces of the slide valve in
close contact. 14 is a flat rod which forms part of the governor, one end of the rod
is attached to the slide, by a pin, in such a manner that it will move easily up and
down, within the grove formed at the bottom of the slide see Fig. 6. 15 is a piece of
steel, to be fixed as shown upon the rod 14. 16 is the gas valve. 17 is a rod with a
hook formed at one end, the other end being attached to the gas valve 16. 18 is a
piece of steel with an inclined plane on the top fixed in situation shown 20 is a stud
or pin with bracket and spring for the purpose of holding the gas valve 16 up in close
contact with the seat upon which it slides, which is formed at the bottom of the slide
seat. 21 is a forked rod attached to the lever 14 by a pin, the rod of the fork
extending upwards through the center of the cotter pin, in the lug of the slide shown
in Fig. 6. 22 being a nut for the purpose of regulateing the presure upon the
spring 23, and so regulating the action of the govornor.

page_text: JOHN DOUGILL OF Uno Street Droughton Lane Bianchester gas cing
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 :-
The first part of my improvement, consists, of an alteration in the movement of the
piston and slides of engines made as described below in manufacturing gas motor
engines according to patent No. 12318 for the year 1884, taken out by me, the piston
is made to travel as near as possible to the cylinder cover, for the purpose of thoroughly
clearing from the cylinder, all the products after combustion. The smaller slide which
controles the supply of gas and air to the cylinder. is timed to admit air but no
gas until the piston has travelled one tenth of its out stroke. And the larger slide is
timed to cut off the supply and ignites the mixture when the piston has travelled five
twelths of its out stroke. According to my new mode of timing them a space equal
to one fifth of the pistons travel remains between the piston and cylinder end when
the piston is at the end of its instroke, In other words there remains a quantity
of products after combustion equal to one fifth of the piston displacement, within
the cylinder after each exhausting stroke of the piston. The smaller slide being
timed to admit gas immediately the piston commences its outstroke. The larger
slide is timed to cut off and ignite the mixture when the piston has travelled about
one third of its out stroke, engines made in accordance with the above, work steadier.
The second and third parts of my invention are entirely new manufactures forming
no part whatever, of the patent referred to above. The second part consists in the
formation and arrangements of the parts which constitute the governor which is
applicable to other gas engines. The third part consists in the formation and
arrangement of the parts constituting the slide valve Figure 1 in the drawings
which were deposited along with the provisional specifacation represents a section
through the slide valves which is made in four parts namely the slide seat. The slido
cover. The slide. And the bottom plate. 2 is an elevation of the slide seat. 3 is
an elevation of the slide cover. 4 is plan of the same. 5 is plan and elevation of the
bottom plate. 6 is plan and elevation of the slide and govornor. 7 represents a
passage formed in the slide seat, which has two entrances or ports marked 77, but in
larger machines three or more ports may be made, and yet be considered the same
port, these ports join together and lead to the cylinder, 8 is the air passage. 10 is a
chamber formed in the slide wherein the igniting flame burns for the purpose of
igniting the mixture while passing into the cylinder at port 7. 9 is the gas passage.
11 is the passage in the slide were the gas and air mix before entering port 7. 12 is
the opening in the slide cover which comunicates with the chimney wherein a second
gas flame burns for the purpose of relighting the flame in chamber 10 of the slide.
13 are the studs upon which nuts are screwed for the purpose of holding the surfaces
of the slides in close contact. 14 is a flat rod which forms part of the governor, one
end of the rod is attached by a pin in such a manner that it will move easily up and

page_text: down within the groove formed at the bottom of the slide see figure 6. 15 is a piece
of steel to be fixed as shown on the rod 14. 16 is the gas valve. 17 is a rod with a
hook formed at one end the other end being attched to the gas valve 16. 18 is a
piece of steel with an inclined plane on the top fixed in the situation shown... 20 is
à stud or pin with bracket and spring for the purpose of holding the surfaces of the
gas valve 16 in close contact with the seat upon which it slides which is formed at the
bottom of the slide seat. 21 is a forked rod attached to the lever 14 by a pin, the rod
of the fork extending upwards through the center of the cotter pin, in the lug of the
slide as shown in figure 6. 22 being a nut for the purpose of regulating the pressure
upon the spring 23, and so regulating the action of the governor; the operation of the
various parts are as follows, The slide is moved by a cam which is fixed upon the
crankshaft; the cam is so formed that it moves the slide according to the following
description. Assuming that the piston is at the end of its exhausting-stroke that is
that end nearest the cylinder cover the slide would then be in the position shown in
the section figure 1. As the piston commences its outstroke, the slide is moved in
the same direction that is to the right uncovering ports 77 and 9. As the piston
moves on gas and air flow into the cylinder until the piston as travelled about one
third of its stroke, when the slide is moved quickly, cutting off the gas and air, and
bringing the chamber 10 into communication with port 7, igniting the mixture just
admitted which propels the piston onward, when the piston as reached the end of its
stroke the exhaust valve is opened, and at this point the slide returns to its origanel
position as shown in figure 1. The exhaust valve remains open until the piston
arrives at the end of its return stroke, this completes the revolution of the engine.
The action of the govornor is as follows. When the slide uncovers port 7 the steel
arm comes into contact with the Hook 17, and the gas valve 16 is drawn open until
the gas passage 9" is open. The gas flows by way of 9" figure 2, and the chamber 16
to 9. When the slide arrives at the place were the mixture is ignited the steel arm
comes into contact with the incline 18, and the result is that it throws up the arm and
disengages the hook. Then the spring 19 forces back the gas valve 16 to its origanal
position see figure 2. As the speed of the engine increases the arm 15 comes more,
voilently into contact with the incline 18 the result is that it throwes up the arm so
quickly that it misses the hook on the following revolution of the engine and the gas
valve 16 is not opened as the speed of the engine decreases the arm again engages
with the hook and in this way the speed of the engine is governed.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare what I claim is
First. The formation and arrangement of the parts constituting the governor
substantially as herein described.
Seccond. The formation and arrangement of the parts constituting the Slide Valve
as herein described.