Year: 1885

page_text: Į, MATHIAS VITAL SCHILTZ, Doctor of Medicine, of Gologne, Germany, da
hereby declare the nature of this invention to be as follows:-
Referring to the engine made as described in English Patents N° 3330.A.D. 1881*
and N° 4455 A.D. 1883 it has been observed, that not only hydrocarbons of high
specific gravity, say 0,80, but also more volatile hydrocarbons having a specific gravity
as low as 0,65, must be heated to as high a temperature as practicable to render
them easily inflammable, to ensure perfect combustion and the best development of
power; it has also been found, that not only in the combustion or explosion
chamber, but also in the accessory apparatus and tubes strong heating is indis-
pensable for forming a good combustible mixture of petroleum and obtaining a
profitable combustion of the usual lighting petroleum, of which 25 per cent may
remain liquid at a temperature of 300 degrees Celsius.
"
The same is the case with the open plates or cups, which are suspended or
mounted in the combustion chambers in order to evaporate the petroleum required
for the following strokes of the piston. These cups or plates highly heated by
repeated explosions were proved profitable, but were not sufficient for the rapid
evaporation of the petroleum dispersed into dust, if this latter was not allowed to
vaporise gradually as could be done in one cylinder engines of Otto's system.
These observations and considerations may be regarded as governing the.
principles of the following improvements on my old patents.
The casting forming the combustion chambers, which open by self acting valves
into the working cylinder, is isolated from this latter by asbestos or other bad
conductor of heat, and the combustion chambers are highly heated by their own,
explosions or other suitable means necessary in order to rapidly evaporate the
petroleum injected into the chambers as a dust and to obtain an easy and perfect
combustion of it; overheating of the combustion chambers is prevented by means
of a small water receptacle kept always at a pressure of a few atmospheres in the
manner to be described later on. For keeping the explosion compartment highly.
heated, it may be jacketed with a bad conductor of heat; the form of explosion
chambers is not an indifferent matter for preventing the waste of heat by the
walls; they may be formed, for instance, as a cylinder A and a cylindrical ring B,,
shewn in the accompanying drawings by Figs. II and VII.
In these combustion chambers, heated as much as possible, are established
metallic receptacles or tubes of a convenient form and of a large inner and outer
H
..

page_text: "
surface to receive and store the heat produced by explosions and to evaporate the
petroleum, which may be passed through these receptacles for the following
explosions.
These evaporating receptacles or tubes may be placed in one or in each com-
bustion chamber, or in the working cylinder, and must be closed hermetically
against the explosion chambers; these evaporating receptacles may be, for instance,
in the form of helically coiled tubes V, Fig. II, or, a cylindrical ring V Fig. 7 or of
a spherical form like the vessel U in the chamber A of Fig. VII.
By the walls of these evaporating receptacles the heat of repeated explosions is
to be taken up and stored as much as may be required, and by this stored heat the
petroleum which passes through the receptacle is to be evaporated, the vapours are
conveyed with atmospheric air to the pump cylinder, or immediately to the
working cylinder, if acting alternately as a pump, like Otto's system.
The evaporation of petroleum will become much easier and more rapid by using
evaporating receptacles, which are filled with small metallic particles, for instance
thin copper wire or iron shavings from shaping, boring or punching machines. In
the same manner the jacket of the combustion chamber may be filled with such
metallic particles and used as an evaporating chamber; this is not shown by
drawings. In passing through the receptacle or jacket, the petroleum is imme-
diately dispersed by these heated particles and rapidly evaporated; metallic
particles are preferable to asbestos or other bad conductors of heat.
Overheating of the explosion compartment is easily prevented, when vaporizing
petroleum, by the waste of heat on the walls of the chambers and by intermittent
explosions (two or more small consecutive explosions instead of a large one), which
may be produced for regulating the speed of the engine.
To render the mixture of petroleum vapours and air more perfect, and for the
preliminary heating of this mixture, atmospheric air may be mixed with the
petroleum passing through the evaporating receptacles and be sucked by the pump
cylinder, as shown in Fig. III, and so prevent the condensation of the petroleum.
With very heavy petroleum, however, the evaporation requires too much heat, and
in such cases evaporated petroleum may be easily condensed in any suitable
manner; in such cases a metallic gas holder of well known construction, for
instance, as shown in Fig. VIII, is inserted between the evaporating receptacle V
and the pump cylinder. In this gas holder, which must be kept warm, the
condensed petroleum is retained, serves to keep the gasholder air-tight and can
afterwards be used as a lubricating oil; it is drawn off by the cock 28. Thus the
gasholder replaces the india rubber balloon, which is usual in gas engines.
The manner of employing petroleum in this motor engine is as follows: From
the reservoir Pae, Fig. 3, which may be a glass-bottle; for putting the engine in
work, volatile or light petroleum, that is of low specific gravity (about, 0,65) runs
through the cock, and heavy petroleum (of higher specific gravity, about 0,80)
flows from the other reservoir P through the cock 25 for continuing the work of
the engine. This hydrocarbon drops into the small funnel t, Fig. III, terminating
by a conically bored metallic tube, that may be closed or opened to any desired
extent by a convenient conical plug of a longitudinal form. This plug acts as a
conical valve and is at the regular speed of the engine, at each revolution of the
fly-wheel, opened and closed for a suitable time by a cam on the crank-shaft and
suitable levers, as shown in Fig. III, in order to admit a sufficient quantity of
hydrocarbon into the open evaporating receptacle V, described above.
When the said conical valve rests in its lowest position, so as to close the
passage, the petroleum is stopped running into the reservoir V. The liquid.
remains in the funnel t and accumulating in the same, it closes a small tube r
which serves to admit air into both petroleum vessels P and Pae; consequently,
as no air can enter, a vacuum is produced in the vessels, and the liquids are
prevented from flowing downwards, although the cocks and 2 are kept open.
When the speed of the engine is too high, the rod is shifted sideways by the
regulator so as to be out of reach of the said cam on the crank shaft-this can be

page_text: done by well known mechanism, and therefore is not shown by the drawings-the
said conical valve then remains closed, the supply of petroleum to the evaporating
receptacles is stopped and the engine runs at a lower speed.
The heavy petroleum, before its introduction into the evaporating receptacles,
may be subjected to a preparatory heating by circulating through a tube 8, Fig. II,
coiled round the explosion compartment.
The more volatile or the heavy petroleum, which flows into the funnel t, thence
passes with air, admitted simultaneously, through the evaporating receptacles, filled
up with metallic particles, and thus is produced a strong combustible mixture,
which may be immediately sucked by the pump cylinder and diluted by a
sufficient quantity of air, that enters through the opening L, Fig. 1; subsequently
the mixture is compressed and driven through the pipe O and the slide valve S
into the combustion chamber or chambers and then ignited in the manner herein-
after described, and produces by combustion the next out stroke of the working
piston.
The heat absorbed by the inner surfaces of the explosion chambers is not wasted,
for it is used for the evaporation of petroleum and for heating the mixture, which
is to be immediately ignited and burned in the same combustion chambers, and
thus the heat lost on one side is regained on the other. The mixture heated
in this manner is more easily ignited, more perfectly burned and produces more
This is an
heat and power, without the inconveniences of imperfect combustion.
important effect of heating the explosion chambers for volatile as well as for
heavy hydrocarbons.
For the same purpose, that is to obtain by means of heated combustion chambers
and evaporating receptacles a heated combustible mixture and to ignite it more
easily and burn it perfectly, it is profitable to preserve the heat in the small
petroleum conduits as much as possible. Therefore the combustion compartment
of the working cylinder is enveloped, as said above, by a bad conductor of heat .W,
Fig. II, and secondly the pumping cylinder is heated in any suitable manner,
which may be done by a special fire or by the exhaust gases, which are conducted
from the exhaust valve through the jacket, by which the pump cylinder is
enveloped, as shown by I, Fig. II.
As the ignition and combustion of every kind of petroleum mixtures requires
everywhere a strong heating, the same is required or useful in the ignition
chamber, but overheating of the slide valve, which contains the igniting chamber,
is prevented by a water chamber G, Fig. VII, situated between the slide valve S
and the combustion compartment for the working cylinder.
The water in the chamber G is always held under air pressure equal to several
atmospheres and this superheated water is to be injected behind the working
piston at each stroke in the manner to be described later on.
In order to obtain a highly heated igniting chamber without overheating of the
slide valve, firstly the ignition chamber and its passages are isolated from the
slide valve by asbestos or other. bad conductor of heat n, Figs. VI and VII, and
secondly I adopt the following arrangement of the igniting chamber m.
For a gas motor this chamber m may be situated in the slide valve itself, but for
a motor worked by petroleum it is preferable to place the chamber m in the slide
valve cover D, as shown in Fig. VI or in front of this cover D, as shown in
Fig. VII. In each case this chamber m is isolated in the manner described above.
The ignition chamber m whether situated in the slide valve S or in the valve
cover D or before the latter, is furnished or filled with combustible mixture from
a suitable source, for instance from the reservoir R, Fig. II, that is in com-
munication with the pump cylinder by a check valve and receives therefrom a
compressed mixture. This mixture is conveyed by a tube of small bore into the
ignition chamber m, which is divided by a perforated plate into an inner and an
outer space.
On this outer space being opened by movement of the slide, the
mixture from the ignition chamber rushes through the fine apertures of the
separating plate and is ignited in front of the plate by the outer flame and burns

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in the outer space without igniting the mixture situated in the inner space of
chamber m. As soon as this outer space is closed by movement of the slide valve,
the mixture in the inner space of the ignition chamber is exploded, and in the
same instant the explosion compartment of the working cylinder, which is now in
communication with the exploded chamber m, is ignited for the following stroke..
This manner of igniting the compressed mixture is quite the same for an ignition
chamber placed in a slide valve or before it or before the slide cover, and is based
on the following principle.
A mixture of best quality compressed in a space or receptacle and rushing out
through small orifices of the same cannot be ignited in a flowing state and cannot
transport flame back into the compressed mixture; it burns only in a calm state.
As soon as the mixture is ignited by the outer flame, and then the said outer
space is closed by movement of the slide valve or otherwise, the pressure being
now equal on both sides, the flame from the outer space is transmitted through the
small perforations of the separating plate into the inner space and from there into
the combustion chamber of the working cylinder that is now opened; in this
manner an explosion produces the ignition of the mixture in the combustion
chambers.
:
The abovementioned heating of the ignition chamber m, which is profitable for
igniting a petroleum mixtúre, is produced by inner explosions and by the outer
igniting flame or jet f Fig. VII, and the heat is retained by means of asbestos or
other bad conductor of heat, with which the ignition chamber m is lined.
The outer igniting flame or jet may be nourished from the reservoir R, fig. II,
and placed below the ignition chamber, Fig. VII.
Employing light petroleum dispersed into dust is very profitable for starting
the engine, when the combustion chambers are not yet heated by their own
explosions.
:
In this case, ignition of the mixture is easily obtained after the igniting
chamber m has been heated by the outer igniting flame f; subsequently, the
following explosions furnish sufficient heat to continue the working of the engine.
When the water chamber G is of no large volume, it will not require to be
emptied before starting the engine.
The outer igniting flame f, Fig. VII, constantly burning before the igniting
chamber may be nourished by compressed petroleum mixture from the reservoir R;
its burner is of peculiar construction, represented in Fig. X. This burner having
a very small bore is half filled with metallic particles like those with which the
above mentioned evaporating receptacles are filled. The burner is covered with a
funnel or perforated hat, from which the flame rushes out with such force, that
any wind does not extinguish the flame, which usually occurs with ordinary
petroleum wick flames.
This petroleum burner is necessary to make the petroleum engine independent
of other combustibles, and is economical, for the flame, increases during the
ignition time and decreases during the exhaustion.
All the arrangements or details of construction described, are designed so as to
obtain a strong heating of all passages of the petroleum; but if required, this
object may be more completely attained by special heating apparatus, for instance
the inner heating of combustion chambers by a furnace established in the chambers,
or a fire made below the combustion chamber, or by evaporation in a heated
helical tube filled with metallic particles or by other means, which will readily
suggest themselves to engineers and do not therefore require illustration by
drawings.
The water, which circulates in the chamber G, in order to be heated and then
injected at each stroke behind the working piston, may be taken by suitable tubes
from the water tank K, Fig. 1II, and run under air pressure to the working
cylinder jacket for cooling the latter and from this jacket to the chamber G, where
it is superheated (that is to say, heated above 100° Centigrade) to a temperature
equivalent to its pressure. This pressure may be produced in the water tank and

page_text: all water passages from the working cylinder explosions being transmitted through
a valve and suitable tube, and this pressure is equal to the highest pressure
obtainable behind the working piston. Therefore superheated water from
chamber G is injected behind the piston, as soon and as long as the injection
valve e, Fig. IX is opened, the said valve being moved downwards by a cam of
the crank shaft and rod h, represented in Fig. II; a special description of this
injection valve is not required. The cock z¹ regulates the quantity of water to be
injected, and through the cock the temperature of the water may be tested.
When employing the heaviest or original petroleum, it may be impossible to
obtain a sufficient heating of the explosion chamber, of the evaporating receptacle
and accessory apparatus or tubes.
In this case, a portion of the petroleum employed, is only dispersed into fine
dust, but the mixture contains too small a quantity of vaporized petroleum and is
therefore not easily ignited by the slide or slide cover-ignition above described.
In this case the reservoir R, from which the igniting chamber m is fed, may be
separately furnished with a very small quantity of light petroleum or gazoline,
which drops into this reservoir R, or is conveyed into the same to enrich the
igniting mixture. In this way the charge of the combustion chamber, if con-
taining too sinall a quantity of evaporated petroleum, can be easily ignited, and
the heat, produced by beginning combustion, evaporates the petroleum dust,
whereby complete combustion of the charge is obtained.
I may overcome the difficulty of ignition of a weak petroleum mixture or, of a
mixture, which contains (unevaporated) petroleum dust in the following manner.
In the inner space of the igniting chamber m, a metallic plate, of copper or
platinum, coiled in suitable form, may be mounted in order to heat this plate and
to heat strongly the igniting mixture before its ignition on the outer flame. Thus
the coiled copper or platinum plate stores the heat of preceding explosions and
evaporates the igniting mixture, and thus the separately heated igniting mixture
is easily ignited and transports the ignition into the combustion chambers of the
working cylinder.

page_text: I, MATHIAS VITAL SCHILTZ of Cologne in the Empire of Germany, Doctor of
Philosophy, 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:—
With engines worked with heated explosion chamber or chambers as set forth
in my Patent N° 3330 of 1881 it has been observed, that not only hydrocarbons of
a high specific gravity (say 0-80), but also those of less specific gravity (up to 0-85)
I have to be heated as strongly as possible in order to render their mixture
easily inflammable and cause them to burn perfectly and produce the best
development of force. It has also been found that a strong heating not only in
the compartment of combustion or explosion but also in the accessory apparatus is
indispensable for forming a good combustible mixture out of the usual lighting
petroleum, of which 25 per cent may remain liquid at a temperature of 300° Celsius;
previous heating is therefore required for profitable combustion.
Open plates or cups as in my patent 4455 of 1883; suspended in the combustion
chamber when highly heated by repeated explosions were found useful for said
purpose but these are insufficient for a sudden evaporation of petroleum injected
in the form of spray.
The following improvements are arranged to obviate these inconveniences of my
old patents.
The compartment of the combustion chamber or chambers which can be opened
by self acting valves into the working cylinder or in free communication with the
latter, is isolated from the said working cylinder by asbestos or other bad conductor
of heat, so that the combustion chambers can be highly heated by their own
explosions or in another suitable way, if required, in order to evaporate rapidly
the petroleum injected therein in the form of spray for obtaining an easy and
perfect combustion thereof.
Overheating of this combustion compartment is prevented by a small receptacle
holding water under pressure of several atmospheres or by a receptacle filled with
heavy petroleum of which the vapour can be used for forming the combustible
mixture, in the manner bereinafter described.
For keeping the explosion compartment at a high temperature it may be lagged
with a bad conductor of heat. If the engine is constructed to obtain subsequent
explosions for one stroke of the piston as in my patent 3330 of 1881 the said
combustion compartment is sub-divided into a cylinder A and a cylinder B
surrounding the same as shown in the accompanying drawings Figs 2 and 7.
In these chambers A and B heated by their own explosions or in any single
chamber are established metallic receptacles or tubes of a convenient form and
size, to receive and store the heat produced by the explosions and to evaporate the
petroleum, which may be passed in. small quantities through the receptacles for the
subsequent explosions.
These heat receptacles or tubes may be placed in one or in each combustion
chamber or in the working cylinder. They must be closed hermetically in the

page_text: combustion chamber and may be formed for instance of coiled tūbės V Fig. 2 ás a
cylinder or cylindrical ring V Fig. 6 or in any spherical form such as V1 Fig. 6.
The walls of said heat receptacles receive and store the heat of repeated
explosions so that by this heat the petroleum which passes through is evaporated
and the vapour conveyed with atmospheric air to the pump cylinder or directly to
the working cylinder when acting as a pump as in Otto's system.
The evaporation of petroleum will become easier and more rapid by filling
these heat receptacles with small metallic particles, for instance the finest copper
wire, shavings or filings of iron. The petroleum conveyed through these evaporating
heat receptacles over said metallic particles is thus immediately dispersed and
rapidly evaporated; metallic particles are for said purpose preferable to asbestos
or other bad conductor of heat.
In order to mingle the petroleum vapour more perfectly with the atmospheric
air this last is led with petroleum through the evaporating receptacles V as shown
in Fig. 3 and aspired by the pump cylinder. In this manner a better mixture of.
petroleum and air is attained and condensation prevented.
But for petroleum which contains a too heavy hydrocarbon its condensing is
sometimes inevitable; in such cases a metallic gasometer of well known construction,
as shown in Fig. 7 of the accompanying drawings is inserted between. the
evaporating receptacles V and the pump cylinder. In this gasometer, which must
be kept warm, the condensed petroleum is retained and serves to keep the
gasometer air tight. This condensed petroleum can be afterwards used as
lubricating oil; it is drawn off by the cock 23. This gasometer replaces, the
caoutchouc balloon generally used in gas engines as a regulator of pressure.
The function of the petroleum, that is the mode of employing it in this motor is
as follows:
A volatile or light petroleum, say of specific weight of 0.65 is allowed to run
through the cock 2' from the receptacle P¹ for setting the engine in action and
heavy petroleum of higher specific weight as 0.80 flows from the other reservoir P
through the cock for continuing the work of the engine, this petroleum drops
into the small receptacle t Fig. 3, which ends below in a conical funnel that may
be closed or opened by a convenient conical plug. This conical plug acts as a
valve, and is at each revolution of the fly wheel lifted and depressed by a cam on
the crank shaft and suitable levers, as shown by Fig. 3, in order to adinit a
sufficient quantity of petroleum into the open evaporating receptacle V, described
above.
This said funnel and plug can be replaced by a small pump used for conveying
a measured quantity of petroleum direct into the evaporating receptacles said
pump being also moved by a cam on the crank shaft.
When the plug rests in its lowered position the level of liquid gradually ascends
in the funnel t and closes thereby a small tuber by which air passes into both
petroleum tanks P and P¹ a vacuum thereby commences therein and the liquids
thereby stopped from flowing downwards although the cocks and 2 remain
open. The amount of petroleum conveyed into the evaporating chambers is
adapted to be regulated according to the speed of the engine; the mechanism for
executing this may be varied as desired and is not shown in the drawings.
Heavy petroleum before its introduction into the evaporating receptacles may
be previously warmed by circulating through a tube s Fig. 2 round the explosion
compartment or through some other receptacle connected with the explosion
compartment.
The volatile or heavy petroleum, which flows into the funnel t passes thence
with the air into the evaporating receptacles V partly filled with metallic particles
and thus produces a strongly combustible mixture, which may be immediately
drawn therefrom by the pump cylinder or the working cylinder when used as
a pump; this mixture is further diluted by a sufficient quantity of air, which
enters through opening L Fig. 1 of accompanying drawings,
.

page_text: In a two cylinder engine as shown in Fig. 2 the mixture is compressed by the
pump and driven through the pipe o Fig. 1 and slide valve S Fig. 5 into the com-
bustion chamber or chambers ignited in the manner hereinafter described and
produces by combustion the next out-stroke of working piston.
The heat wasted on the inner surfaces of the explosion chambers is not lost it
being used for evaporating petroleum and for heating the mixture, which is to be
next ignited and burnt in the same combustion chambers, and thus the heat wasted
on one side is regained on the other side....
The mixture heated in the said manner by the explosion chambers is more
easily ignited, its combustion is more perfect and it produces a greater heat and
force without the well known inconveniences of imperfect combustion. Heated
explosion chambers also enable the employment of volatile hydrocarbons as well
as heavier qualities.
In an engine constructed with a working and a pump cylinder the combustion
compartment of the working cylinder. may be enveloped by a jacket W Fig. 2 of
bad conductor of beat, and secondly the pumping cylinder should be heated in a
suitable manner-this may be done by the exhaust gases, by conducting them from
the exhaust valve through a jacket I surrounding the pump cylinder as shown in
Fig. 2.
As every quality of petroleum mixture requires all along its route a strong
heating, the same is required or useful in the igniting chamber of the slide valve
but overheating of the slide valve should be prevented by. a water. chamber G
Fig. 6 arranged between the slide valve S and the combustion compartment of the
working cylinder.
The water of said chamber G is always held under pressure of several
atmospheres and this overheated water is injected behind the working piston at
each stroke in the manner hereinafter described.
In order to obtain an highly heated igniting chamber firstly it is isolated from
the slide valve S by asbestos or other bad conductor of heat n Figª 6 and 7 and
secondly I use the following arrangement of igniting chamber m.
This chamber may be in a gas motor, arranged in the slide valve itself, but for
a petroleum motor, it is preferable to form the chamber m in the slide valve cover D,
as shown in Fig. 5 or in front of the same as shown in Fig. 6.
The igniting chamber m whether arranged in the slide valve S or in the valve
cover D or in front of the latter, is furnished with combustible mixture from any
suitable source, for instance from the reservoir R Fig. 2, which is in communication
with the pump cylinder by a little conical valve and contains therefore a compressed
mixture. This mixture is conveyed by a small pipe into the igniting chamber m,
which is divided by a perforated plate i into an inner and an outer space.
When
communication is opened by a movement of the slide S the mixture for chamber m
rushes through the perforations in the separating plate and is ignited in front of
the latter by an outer jet f and burns in this outer space i without igniting the
inner space of chamber m, the current of gas being too strong. As soon as the
outer space of chamber m is closed by movement of the slide valve S, the mixture
is exploded in the inner space and this explosion is at the same moment carried
into the explosion compartment of the working cylinder, that is now put in
communication with the igniting chamber m.
For putting the engine in work light volatile petroleum may be used, the com-
.bustion chamber. not yet being heated by the explosions, in this case ignition of
the mixture is easily obtained by previous heating of the igniting chamber m made
by the outer flame f, afterwards the following explosions furnish a sufficient heat
for continuing the working of the engine.
The outer igniting flame f Fig. 6, constantly burning before the igniting
chamber m can be fed by compressed petroleum mixture taken from the reservoir R
Fig. 2; its burner is of peculiar construction as represented in Fig. 9. This burner
fed through a small pipe is half filled with metallic particles as before mentioned

page_text: such as the evaporating receptacles V contain. This burner is covered above with
an inverted funnel from which the gas 'rushes with sufficient force to prevent it
from being extinguished by wind as is commonly the case with open petroleum
wick flames. Thus said petroleum burner is important it making this petroleum
engine independent of any other combustible such as illuminating gas.
The above mentioned injection of water to be performed at each stroke behind
the working piston is carried out as follows:-
The water supplied by a water tank K Fig. 3 and kept under pressure of
several atmospheres is conveyed through the jacket of the working cylinder for
cooling the latter an from this jacket to the chamber G where it may be heated
to a temperature corresponding to its pressure. This pressure may be obtained by
air pressure taken from the working cylinder by means of a check valve or by a
special water pump.
By said pressure superheated water from chamber G is injected below the
working piston as soon and as long as the injection valve e Figs 8 and 2 is opened
by a cam on the crank shaft.
The cock & regulates the quantity of water to be injected and by the cock ³ the
temperature of water may be ascertained.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what.
I claim is
In petroleum engines:-
1. In combination of the heating of the explosion chamber or chambers with the
heating of all accessory apparatus through which petroleum combustible mixture
Hows, in order to prevent condensing of petroleum and to obtain its easy and
complete combustion, substantially as described.
2. The construction of metallic evaporating vessels for evaporating petroleum
arranged in the explosion chamber but hermetically separated therefrom in order
to store the heat of explosions and utilize the same for a rapid evaporation of
the petroleum passed through the said vessels, substantially as described and
illustrated.
3. The combination with said evaporating vessels of small metallic particles,
in order to produce a large & heat conducting surface for evaporating petroleum
substantially as described.
4. The use of a metallic gasometer of known construction Fig. 8 of the drawings,
in order to regulate the pressure of the petroleum mixture and to separate the
heavy petroleum condensed therein, substantially as described.
5. The device described, for igniting a compressed petroleum mixture for a
petroleum motor of which the heated igniting chamber m arranged in or on the
slide valve cover D, substantially as described and illustrated.
Dated this 97th day of July 1886.