IM- PROVEMENTS IN GAS MOTOR ENGINES
Year: 1877

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, for the Invention of "IM-
PROVEMENTS IN GAS MOTOR ENGINES." A communication from abroad by
Joseph Wertheim, of Bornheim, near Frankfort-on-the-Main, Germany.
Sealed the 20th July 1877, and dated the 10th March 1877.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 16th March 1877.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
"IMPROVEMENTS IN GAS MOTOR ENGINES." A
Southampton Buildings, London.
communication from abroad by Joseph Wertheim, of Bornheim, near Frankfort-on-
the-Main, Germany.
This Invention relates to improvements in gas motors or engines, and more
especially to further improvements in the engines or machines described in the
Specification of former Letters Patent, dated September 1, 1876, No. 3444.
According to the said former Invention the machine consists of the following
narts namely.

page_text: 3. The power is transmitted to the fly wheel through two entirely new arrange-
ments of mechanisms, namely, by toothed wheels or gearing and ratchet wheels, or
by a spring alternately bent and released, and one ratchet wheel.
4. Instead of the former arrangement for the expulsion of the combustion wasto
I use another much simpler construction, herein-after described.
5. The explosion dome of this new engine or machine is surrounded by a water
jacket, and provided with a cooling vessel.
6. The slide valve has improvements allowing a more favorable distribution of air
and gas at the igniting point of the dome.
7. The construction of the disc moving the slide valve is so modified that the 1
working may be noiseless.
8. The ignitor is modified, especially in the parts for feeding the air.
9. The regulator is the same as in the said former Specification, except that the
connecting parts are somewhat changed.
10. The reservoir in this new engine or machine consists of a cylindrical tube 1
fitted at its end with a cap preventing the spouting of the water.
In my said former engine or machine the syphon-like tube is fitted at its bending
point with a paddle wheel enclosed in a case; one part of the syphon supports a
small open reservoir, the other supports the explosion dome. The whole apparatus
is filled with water. Air and gas, mixed in the proper proportion, enter the
explosion dome; this entrance is regulated by the slide valve. This mixture is
ignited, explodes, and forces the liquid downwards through the paddle wheel in the
other part of the syphon and its reservoir. The vis viva of the water is taken up
by the paddle wheel and transmitted to the main shaft. In one part of the syphon
the liquid is carried away by the explosion; by this action, and by the following
contraction of the combustion waste, a vacuum is produced. This vacuum causes
the water contained in the reservoir to flow back into the explosion dome.
The combustion waste reduced to atmospheric pressure does not prevent the
ascent of the returning liquid above the level of the water, because at the proper
time the waste gases are expelled. The rapidly returning liquid, by means of
peculiar mechanism, drives the paddle wheel.
The action above described also takes place in my new engine or machine.
The two tubes of the syphon are placed vertically and parallel upon the case
containing the oscillating paddle. One of the tubes represents the reservoir and the
other supports the explosion dome. This arrangement is designed to give the
machine more stability, and to make it more compendious.
Instead of the paddle wheel used in the former machine I now employ only one
oscillating paddle for receiving and transmitting the power.
Upon the box or case the two parallel tubes are screwed; one tube supports the
explosion dome and the other tube forms the reservoir. Both tubes cominunicate
through a suitable channel in the case. The paddle turns around its axle and nearly
closes the channel.
The said paddle has two openings; these openings are covered above by a valve,
and below by another valve. The first valve is held open by a spring and pressed
against its seat.
When the second valve is open the mixed gas enters the dome, a valve in the box
is opened by the weight of the liquid, and the latter escapes through the first valve,
which is held open by the spring.
The following explosion presses the said valve strongly against its scat, the paddle
closes the channel, and is moved by the pressure of the explosion gas. When the
vacuum in the dome and in the tube is produced the second valve is closed by the
atmospheric pressure and the paddle returns to its first position. The said paddle
has a nose which prevents the beating of the arm of the paddle against the adjacent
parts.
As soon as the nose has passed a certain point some liquid is forced into a
triangular space through small openings between the paddle and the case; this
action produces a resistance, taking off the vis viva of the paddle. The vis viva of

page_text: the liquid opens the valve, and the liquid escapes in the tubo. When the liquid
has arrived at its highest point the valve is closed by a spring and by the atmo-
spheric pressure. During the back motion of the paddle the valve in the box is
closed by a spring, and the liquid in the front of the paddle is driven through
another valve, and through a tube enters the dome.
The last-named valve moves a lever, and a spring closes the valve by means of
this lever, which also moves mechanism for discharging the waste gas. The said
lever moves a bar and valve up and down. By the opening of one valve the other
valve is drawn downward, and the waste gas escapes through a channel and tube;
by this action the small valve is opened. The ejected liquid is conducted back to
the tube of the dome; the liquid entering the dome closes the valves.
Thero are two small reservoirs for taking up all the impurities, and these may be
emptied by a suitable opening. The paddle is therefore alternately moved by the
explosion and the atmospheric pressure, and has an oscillating motion transmitted
by the axes to the main shaft.
The transmission of the power to the main shaft in this new machine is effected
in two different ways, as above stated, namely, first, by toothed wheels and ratchet
wheels, and secondly, by a spring alternately contracted and released, and a ratchet
wheel.
In the first-named machinery a driver fastened upon the paddle axe causes, by
means of a lever, the shaft to oscillate around its axes. On a shaft are fastened two
pinions or small wheels, which, by means of suitable intermediate fast and loose wheels,
are connected with two caps loose on the main shaft; the fly wheel and a cord pulley
are fixed to the said main shaft. If the paddle or the shaft oscillates from the left to.
the right one pinion with one cap will revolve in the same direction, whilst another
pinion catching directly into one of the wheels revolves in the opposite direction.
The changing of this alternate motion into a continually revolving motion is effected
in the following manner :-A pulley is provided on both sides with naves fitting
slightly in the said caps. Each of these naves has three or more wedge-formed
channels, in which cylindrical pins are placed; the latter are pressed by spiral
springs in the direction in which the main shaft revolves. The paddle now being
free to oscillate in any direction, one of the caps tends continually to push forward
the pulley by the pins in the revolving direction of the fly wheel; during this
operation the other cap moves back without any effect on the naves.
The axes
revolve uniformly; the driver has a spring, and thus prevents too great pressure
during forward motion of the paddle on the driving mechanism on the cap.
In the second of the above-named arrangements of mechanism I change the oscil-
lating motion into a continuous one. By this arrangement the cord pulley is
fastened on its shaft. The driver causes one of the caps to make the same oscillations
as itself. The cylindrical pins press only in one direction; in the other direction
the
cap moves loosely over the nave. During the explosion the cap becomes loose
over the nave at the same time a spring is contracted by means of an unrolled band.
In the succeeding returning oscillation the spring transmits its power to the pulley
shaft, and the cord pulley is caught and moved by means of the aforesaid pins. The
said spring serves here as a power reservoir of the explosion shock, and remits the
power during its back motion. By the first arrangement above described the
explosion shock and the atmospheric pressure work separately and at different
times on the fly wheel. By the second arrangement the action of the explosion
shock and of the atmospheric pressure takes place simultaneously.
The aforesaid dome has a jacket; the space between the dome and the said jacket
is in connection with a chalice-forined vase, both being filled with water for
cooling purposes. In the water is placed a spiral tube, through which a stream of
cold air is driven by means of a pump; by this arrangement the water is kept cool.
The slide valve has on the surface towards the dome a groove. During the
upward motion of the slide valve the groove passes over the igniting point. By the
downward motion of the slide valve the said groove passes on the side of the
igniting point; this groove serves to feed the igniting point directly with mixed

page_text: gas, in order to obtain a sure ignition, for if mixed gas enters alone the opening in
the dome it may happen, by a quick series of explosions, that the air and gas are
not thoroughly mixed at the igniting point, and therefore the explosions will be
uncertain.
The crank disc of the slide valve turns loosely upon its axis, and upon the latter
is fastened a catch pin. The nave of the crank disc is cut on one side. The said
catch pin turns the disc over the culminating point, and then the spring working on
the slide valve gives a quick turn to the crank disc. The ignitor is placed in a
socket; this socket slides upon a hat-shaped piece, the latter being fastened to the
slide valve. The socket has two openings, through which atmospheric air enters
into the said piece; there is a slot in the socket. The slide valve being at its lowest
point the inner space of the said bat-shaped piece is connected with the atmospheric
air through the opening at the slide valve and through the slots. The flame of the
ignitor burns laterally through a slot, the funnel leading the gas stream to the flame.
The funnel upon the vertical pivot is pressed by a spring against the burner.
When the slide valve has nearly arrived at its highest point the socket slides
against a part fastened to the slide valve cover, and moves the socket in the proper
direction.
The socket is guided by a pin; if the socket has arrived at the point where the
slot is inclined the spring helps to turn the socket, and by this means to shut off
the connection of the hat-shaped piece with the atmospheric air.
By the sliding of the socket a pin is caused to press the funnel backwards; the
flame of the ignitor burns through the middle of the hat-shaped piece, and ignites
the mixture of gas in the dome when the slide valve moves down. No gas can
escape through the hat-shaped piece, because the socket closes the same tightly. At
the moment before the slide valve arrives at its lowest point a part fastened to the
socket meets a fixed point; by this movement the socket is so far turned that the
guide pin is replaced in the straight part of the slot; then the spring presses
the socket back, so that the hat-shaped piece is reopened and can be filled with
atmospheric air. The igniting flame of the tube is ignited through a slot by the
flame. The effect of the spring is twofold; it turns the socket, and prosses the
same backward.
In the improvements referring to the regulator and its transmitting mechanism a
small pulley is placed loose on a shaft and the driver is fixed to the latter. The
nave of the said small pulley bas teeth, in which a pawl catches. If the machine
revolves too quickly the regulator raises a bar; by this movement the pawl is
disengaged and the pulley turns freely upon the shaft.
The slide valve rests at its lowest point till the regulator has moved the bar
downwards; by this movement the pawl catches the teeth of the pulley, and the
slide valve recommences its movement.
The new reservoir consists of the aforesaid extended tube. This tube is furnished
with a cap allowing the free entrance and exit of the atmospheric air, but not the
escape of water.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Robert Lake in the Great Seal Patent Office on the 14th
September 1877.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, and Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN GAS MOTOR ENGINES." A
communication from abroad by Joseph Wertheim, of Bornheim, near Frankfort-on-
the-Main, Germany,
This Invention relates to improvements in gas motors or engines, and more
especially to further improvements in the engines or machines described in the
Specification of former Letters Patent, dated September 1, 1876, No. 3444.

page_text: VIL. A wheel with curve DOES THE FUN GOOG
VIII. The reservoir.
And, IX. The arrangement for furnishing the air to the igniting apparatus.
This machine is now improved in the following manner, that is to say,
1. Instead of setting the communicating pipes in a slanting or inclined position
1 dispose them vertically, and thus give the machine a better appearance, and make
it more compact and convenient than heretofore.
2. Instead of the former paddle wheel used as a power receiver, I employ in this
improved machine one simple oscillating paddle.
3. The power is transmitted to the fly wheel through two entirely new arrange-
ments of mechanism, namely, by toothed wheels or gearing and ratchet wheels, or
by a spring alternately bent and released and one ratchet wheel.
4. Instead of the former arrangement for the expulsion of the combustion waste
I use a much simpler construction, as herein-aflor described.
5. The explosion dome of this improved engine or machine is surrounded by a
water jacket and provided with a cooling vessel.
6. The slide valve is so constructed as to allow a more favorable distribution of
air and gas at the igniting point of the domo.
7. The construction of the disc moving the slide valve is so modified that the
working may be noiseless.
8. The ignitor is modified, especially in the parts for feeding the air.
9. The regulator is the same as described in the said formor Specification, except
that the connecting parts are somewhat changed.
10. The reservoir in this improved engine or machine consists of a cylindrical
tube fitted at its end with a cap preventing the spouting of the water.
In my said former engine or machine the syphon-like tube is fitted at its bending
point with a paddle wheel enclosed in a case. One part of the syphon supports a small
open reservior, the other supports the explosion dome; the whole apparatus is filled
with water; air and gas mixed in the proper proportion enter the explosion dome;
their entrance is regulated by the slide valve; this mixture is ignited, explodes and
forces the liquid downwards through the paddle wheel in the other part of the
syphon and its reservoir. The vis viva of the water is taken up by the paddle
wheel and transmitted to the main shaft. In one part of the syphon the liquid is
carried away by the explosion; by this action and by the following contraction of
the combustion waste a vacuum is produced; this vacuuin causes the water contained
in the reservoir to flow back into the explosion dome.
The combustion waste reduced to atmospheric pressure does not prevent the
ascent of the returning liquid above the level of the water, because at the proper
time the waste gases are expelled. The rapidly returning liquid by means of the
peculiar mechanism drives the paddle wheel.
The action above described also takes place in my new or improved engine or
machine.
This engine or machine is represented in the accompanying Drawing, in which
Figure 1 is a front view partly in cross section.
Figure 2 is a vertical longitudinal section through one part of the syphon tube,
with the new power transmitting mechanism to the main shaft.
Figure 3 is a view of the machine showing the opposite side to that shown in
Figure 1.

page_text: Figures 4, 5, 6, 7, 8, 9, 10, and 34 show details or modifications of the power
transmitting mechanism.
Figures 11, 12, 13, 14, and 15 illustrate the improvement in the slide valve.
Figures 16, 17, 18, 19, 20, 21, 22, 23 illustrate the improvements in the ignitor
and the air feeder.
Figures 24 and 25 show modifications of the regulating mechanism.
Figure 26 shows the arrangement for the expulsion of the waste gases.
Figures 27, 28, 29, and 30 show details of the oscillating paddle.
Figures 31, 32, and 33 represent a modified construction of the crank disc for
moving the slide valve.
The two tubes of the syphon are placed vertically and parallel upon the case con-
taining the oscillating paddle (see Figures 1, 2, 3). One of the tubes represents the
reservoir, and the other supports the explosion dome; this arrangement is designed
to give the engine or machine more stability, and to make it more compendious.
Instead of the paddle wheel used in my former machine, I now employ only one
oscillating paddle for receiving and transmitting the power; Figures 1, 2, 3 show
this combination. Upon the box or case B the two parallel tubes C and are
screwed; the tube t supports the explosion dome A, and the tube C forms the
reservoir; both tubes communicate through the channel x in the case B. The
paddle b¹ turns around its axle 111 and nearly closes the the channel 2.
The said paddle has two openings (Figure 30); these openings are covered above
by the valve d, Figures 27, 28, 29, and below by a valve e'. The valve d¹ is held
open by a spring f¹ and pressed against h².
When the valve c¹ is open up to g¹ the mixed gas enters the dome A, the valve u
in the box B (Figure 1) is opened by the weight of the liquid, and the latter
escapes through the valve d', held open by the spring f1, to the channel.
The subsequent explosion presses the valve strongly against its seat, the paddle
b¹ closes the channel, and is moved by the pressure of the explosion gas. When the
vacuum in the dome and in the tubet is produced, the valve e¹ is closed by the
atmospheric pressure, and the paddle b₁ returns to its first position. The paddle b
has a nose c, which prevents the beating of the arm of the paddlo against
As soon as the nose a¹ has passed the point all, some liquid is forced into the
triangular space. This liquid is forced through the small openings between the
paddle and the case. This action produces a resistance taking off the vis viva of
the paddle. The vis viva of the liquid opens the valve y, and the liquid escapes in
the tube C. When the liquid has arrived at its highest point, the valve y is
closed by a spring and by the atmospheric pressure. During the back notion of
the paddle b, the valve u in the box is closed by a spring, and the liquid in the
front of the paddle is driven through the valve q in the direction of the arrows, and
enters the tube t and the dome A.
The valve g moves a lever 2 pivoted at 1. The spring & closes the valve by
means of the lever p, which latter also moves mechanism for discharging the waste
gas. The lever pinoves tho bar o and the valve m up and down. By the opening
of the valve the valve m is drawn downwards, and the waste gas escapes through
the channel and the tube p". By this action the small valvo n is opened. The
ejected liquid is conducted back to the tube C by means of the tube u". The
liquid entering the dome closes the valve in, and by means of the bar o, and also
closes the valve q. x, y, are two small reservoirs taking up all the im-
purities, and may be emptied by a proper opening. The paddle bi is therefore
alternately moved by the explosion and the atmospheric pressure, and has an
oscillating motion transmitted by the axis a to the main shaft.
The transmission of the power to the main shaft in this new machine is effected
in two different ways, as above stated, namely, firstly, by toothed wheels and
ratchet wheels; and, secondly, by a spring alternately contracted and released, and
a ratchet wheel.
Figures 2, 3, 4, 7, 8, and 9 illustrate the first, and Figures 5, 6, and 10 thẹ

page_text: second arrangement for this purpose. In the first the driver e¹ fastened upon the
paddle axis, Figures 2 and 34, causes by means of the lever n¹ the shaft q¹ to'
oscillate around its axis. On the shaft q¹ are fastened the two pinions or small
wheels all and ¹, which catch by means of a pinion b¹¹ turning loosely on the
shaft in wheel c", whilst the wheel " catches directly in the pinion e¹¹. The
pinion c¹¹ and ell are not fast on the main shaft p¹, but loose like the two caps u¹
and with which they are connected. The fly wheel and the cord pulley are
fixed to the main shaft p¹. If the paddle or the shaft q¹ oscillates from the left to the
right, Figure 8, the pinion c" with the cap u¹ revolves in the same direction, whilst
the pinion e, Figure 9, catching directly into the wheel d", revolves in the.
opposite direction. The shaft q¹ may oscillate to the right or to the left, but in
either case one of the two caps will oscillate in the revolving direction of the fly
wheel. The changing of this alternate motion into the continually revolving,
motion is effected in the following manner, namely, the pulley a¹ is provided on
both sides with naves fitting slightly in the caps u¹ and Each of these naves.
has three or more wedge-formed channels, in which the cylindrical pins e¹ are
placed; the latter aro pressed forward by spiral springs in the direction of the
arrow, that is to say, in the direction in which the main shaft revolves. The paddle
being free to oscillate in any direction, one of the caps tends continually to push
forward the pulley by the pins in the revolving direction of the fly wheel. During.
this operation the other cap moves back without any effect on the naves. The
axis p revolves uniformly. It must be remarked that the driver U, Figures 2 and
34, has a spring ml, and thus prevents excessive pressure during the forward motion
of the paddle on the driving mechanism on the cap u².
Figures 5, 6, and 10 illustrate the other arrangement for changing the oscillating
motion into a continuous one. In this arrangement the cord pulley is fastened on
the shaft 2. The driver causes the cap u to make the same oscillations as itself.
The cylindrical pins ¹ press only in one direction; in the other direction the cap
moves loosely over the nave. During the explosion the cap becomes loose over the
nave, at the same time a spring f" is contracted by means of an unrolled band ".
In the succeeding returning oscillation, the spring transmits its power to the shaft p',
and the cord pulley is caught and moved by means of the aforesaid pins. The said
spring serves here as a power reservoir of the explosion shock, and remits the power
during its back motion.
By the first arrangement above specified the explosion shock and the atmospheric
pressure work separately and at different times on the fly wheel.
By the second arrangement the explosion shock and the atmospheric pressure
act simultaneously. The dome A has a jacket; the space between the dome and
the said jacket is in connection with a chalice formed vase ql, both filled with water
for cooling purpose. In the water is placed a spiral tube, through which a stream
of cold air is driven by mean of a pump; by this arrangement the water is kept
cool.
The slide valve shown in Figures 11, 12, 13, 14, and 15 has on the surface towards
the dome A, a groove P¹, Figure 15. During the upward motion of the slide valve
H this groove passes over the igniting point F. By the downward motion of the
slide valve the said groove P¹ passes on the side of the igniting point, sce
Figures 11, 12, 13, 14. This groove P¹ serves to feed the igniting point F directly
with mixed gas in order to obtain a sure ignition; for if mixed gas enters alone
the opening E in the dome, it may happen by a quick series of explosions that the
air and gas are not thoroughly mixed at the igniting point, and therefore the explo-
sions will be uncertain.
The crank disc G of the slide valve H turns loosely upon its axis b, Figure 2,
and upon the latter is fastened the catch pin y". The nave of the crank disc is cut
on one side, as seen in Figures 31, 32, 33. The catch pin yll turns the disc Gover
the culminating point, Figure 31, and then the spring U working on the slide valve H
gives a quick turn to the crank disc G (Figures 11, 12, 13, 14).

page_text: The ignitor and its air feeding apparatus are represented in Figures 18 to 23, and
also in Figure 11 to 17.
The ignitor E is placed in the socket T¹, Figure 20; the socket T¹ slides
upon a hat-shaped piece T, the latter being fastened to the slide valve. The socket
T has two openings X, Figure 22, through which atmospheric air enters into the
said hat-shaped piece T; " is a slot in the socket T¹, Figure 22. The slide valve
H being at its lowest point, the inner space of the piece T is connected with the
atmospheric air through the opening at the slide valve and through the slots X,
Figures 20, 22. The flame of the ignitor Q burns laterally through a slot X, the
funnel m¹¹ leading the gas stream through X to the flaine S, Figure 20. The funnel
m upon the vertical pivot n is pressed by a spring against the burner. When the
slide valve has nearly arrived at its highest point, the part Z of the socket slides
against a part Y (fastened to the slide valve cover T) and moves the socket T' in the
direction of the arrow, see Figures 17, 18, 19, 20, and 23.
The socket T is guided by the pin ", Figure 22; if the socket T¹ has arrived at
the point where the slot h¹¹ is inclined, the spring helps to turn the socket and
to shut off the connection of the piece T with the atmospheric air.
By the sliding of the socket Ti the pin o" is caused to press the funnel m¹l back-
wards in the position shewn in Figure 21, and the flame of the ignitor Q burns
through the middle of the hat-shaped piece T and ignites, when the slide valve H
moves down. No gas can escape through the hat-shaped piece, because the socket
T closes the same tightly. At the moment before the slide valve arrives at its
lowest point, the part a fastened to the socket T¹ meets the fixed point a³, Figure 16,
17, 23. By this imovement the socket T¹ is so far turned that the guide pin i",
Figure 22, is replaced in the straight part of the slot ". Then the spring presses
the socket T¹ back so that the hat-shaped piece T is reopened and can be filled with
atmospheric air. The igniting flame of the tube Q is ignited through the slot X by
the flame S. The effect of the spring 11 is twofold, as it turns the socket T¹ and
presses the same backwards.
In the improvement referring to the regulator and its transmitting mechanism,
a small pulley e is placed loosely on the shaft b, and the driver f is fixed to
the latter. The nave of the small pulley e has teeth in which the pawl g catches.
If the engine or machine revolves too quickly, the regulator raises the bar h; by
this movement the pawl is disengaged and the pulley e turns freely upon the
shaft b.
The slide valve rests at its lowest point till the regulator has moved the bar h
downwards, the pawl 7 catches the teeth of the pulley, and the slide valve H
recommences its movement.
The new or improved reservoir consists of an extended tube C, Figures 1 and 3.
The tube C is furnished with a cap allowing the free entrance and exit of the
atmospheric air but not the escape of water. This escape is prevented by the
part 1, Figure 1.
In the working of the said engine or machine, the same is filled with water
or other liquid up to the valve n. The liquid contained in the tube C_is discharged
till it is level with the cock 1, Figure 1.
'
The flame S being ignited, the gas cock is opened and the fly wheel put in
motion by hand till the first explosion takes place; then the machine operates.
By the turning of the flywheel in its revolving direction the main shaft and the
small pulley turn loosely in the driving caps u¹ and 7, but if these caps begin
to work by the movement of the paddle, the pins act on the fly wheel as
described.
Having thus.fully described the said Invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it understood
that I claim,-
First. The construction of the oscillating paddle with its two valves de¹ and the
auxiliary valves q, u, y, as above described and in the manner specified.
Second. The bar o and the valve m for the purpose specified.

page_text: Third. The combination of parts for the transmission of the power either by
gearing and ratchet wheels or by a bent spring and ratchet wheel, as above
described.
Fourth. The explosion done with its jacket and its cooling vessel, as above set
forth and for the purpose specified.
Fifth. The cooling of the water by means of air driven through a spiral tube, as
above set forth.
Sixth. The grooves in the slide valves, as above described and for the purpose
specified.
Seventh. The construction of the crank disc G and the spring U, as above set
forth and for the purpose specified.
Eighth. The construction of the burner as above described.
Ninth. The improved engine or machine consisting of the parts constructed
and combined as shewn in the accompanying Drawing, and operating as above
set forth.
In witness whercof, I, the said William Robert Lake, have hereunto set my
hand and scal, this Tenth day of September, in the year of our Lord Ono
thousand eight hundred and seventy-seven.