Year: 1897

page_text: We, EDWARD SELLO, Manufacturer's Agent, of 12A Finsbury Square, in the City of
London, Orro FRANZ SCHAEFER, Merchant, of 23 Pestalozzistrasse, Charlottenburg,
Prussia, and THEODOR LEHMBECK, Engineer, of Halensee, near Berlin, Prussia, do
hereby declare the nature of this invention to be as follows:-
Our improvements relate principally to the means for supplying, evaporating,
mixing and igniting the explosive mixture in petroleum and other oil engines, but
are partly applicable also to gas engines.
In the accompanying drawings Fig. 1 is an axial section through the rear end of
the combustion chamber of a petroleum engine embodying our invention, while
Fig. 2 represents a modification on a smaller scale.
The evaporating, mixing and igniting apparatus is mounted on a valve base b,
which in its turn is screwed on the rear end of the power cylinder or combustion
chamber A of the engine, so that the interior of the latter may be rendered accessible
for inspection and cleaning by simply screwing off the valve base b.
On the valve base is mounted at one end the air supply valve v₁, the spindle of
which carries a piston and serves as a piston rod of the oil pump.
In the modification represented by Fig. 2, the oil piston is not on the valve
spindle, but parallel with the same. p represents the oil inlet of the feed pump x,
and p the oil outlet; d is the valve box.
During the suction period, the air valve V, is drawn downward, and imparts motion.
to the pump piston x which, by its downward motion, closes the oil inlet p and forces
the petroleum through the outlet pipe p¹ leading to the spray-producer or atomizing
valve 2 mounted on the evaporator c.
Through the evaporator c passes an igniting tube 1, which is not heated from the
outside, but from the inside.
Above the igniting tube, that is, between the latter and the valve 2 leading to
the evaporator c, there is a partition 3, which prevents the direct contact of the
petroleum with the tube. The injection of petroleum into the evaporator takes
place simultaneously with the admission of air, and as vapour is formed instan-
taneously, strong eddies are produced in the passage leading through the valve
base to the combustion chainber A, which eddy current materially promote the
mixture of the petroleum vapour with the air.
During the subsequent compression period, the mixture of petroleum vapour and
air is driven back into the evaporator c, and the richer mixture already contained
in the upper part of the evaporator is ignited by its contact with the tube 1.
On the opposite side of the valve base is mounted the casing e of the exhaust
valve containing the exhaust valve V. The valve casing e is connected with a small
LD
077

page_text: cylinder containing a piston g. The top of the cylinder f communicates with
the valve base through a tuber when the valve v is open, which valve serves for
periodically establishing and shutting off communication between the upper part of
the cylinder and the valve base b.
At every revolution of the crank shaft the valve vis lifted (or the corresponding
stop cock turned) so that after the working stroke, the gases of combustion which
have still a pressure of about 3 atmospheres, act on the-piston g, and as the piston
has a larger diameter than the valve V₁, the latter will move downward, so as to open
the
passage.
As all the valves are mounted on a common base, which can be screwed to the rear
end of the power-cylinder, the various parts are easily accessible; the new arrangement
also serves to produce a good combustible mixture, and as the tooth wheels, shafts
and rods usually employed for operating the exhaust valve and the oil pump are
dispensed with, the weight of the engine is much reduced, and the working is almost
noiseless.
The construction of the evaporator, which is divided into two compartiments the
lower of which contains the internally heated igniting tube, ensures that the best
mixture is always near the point of ignition; moreover the heating surface of the
igniting tube is large enough to ignite even a less inflammable mixture. The principal
advantage is, however, that a motor provided with the new arrangement of valves may
be worked equally well with gas or benzoline, and with petroleum.
Dated this 5th day of July 1897.
FAIRFAX & WETTER,
Agents for the Applicants.
Improvements in Oil and Gas Engines.
We, EDWARD SELLO, Manufacturers' Agent, of 12A Finsbury Square, in the County
of London, OTTO FRANZ SCHAEFER, Merchant, of 23 Pestalozzistrasse, Charlottenburg,
Prussia, and THEODOR LEHMBECK, Engineer, of Halensee, near Berlin, Prussia, 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 improvements relate principally to the means for supplying, evaporating,
mixing and igniting the explosive charge in petroleum and other oil engines, but are
partly applicable also to gas engines.
In the drawings filed with the Provisional Specification, Fig. 1 is an axial section
through the rear end of a petroleum engine embodying our invention, while Fig. 2
represents a modification on a smaller scale.
The evaporating, mixing, and igniting apparatus is mounted on a valve-base b,
which in its turn is screwed on the rear end of the power cylinder or combustion
chamber A of the engine, so that the interior of the latter may be rendered accessible
for inspection and cleaning by simply screwing off the valve base b.
On the valve base is mounted at one end the air supply valve V₁, the spindle of
which carries a piston x and serves as piston rod to the oil pump.
In the modification represented by Fig. 2, the oil-piston is not on the valve spindle,
but parallel with the same. p.represents the oil inlet of the feed pump x, and p¹ the
oil outlet; d is the valve box.

page_text: During the suction period, the air valve V₁ is drawn downward, and imparts
motion to the pump piston which by its downward motion, closes the oil inlet p
and forces the petroleum through the outlet pipe på leading to the spray producer or
atomizing valve 2 mounted on the evaporator c.
Through the evaporator c passes an igniting tube. 1 open at both ends, which
tube is not heated from the outside, but from the inside.
Above the igniting tube, that is, between the latter and the valve 2 leading to the
evaporator c, there is a partition 3, which prevents the direct contact of the petroleum
with the heating tube. The injection of petroleum into the evaporator takes place
simultaneously with the admission of air, and as vapour is formed instantaneously,
strong eddy currents are produced in the passage leading through the valve base b.
to the combustion chamber A, which eddy currents materially promote the mixture
of the petroleum vapour with the air.
During the subsequent compression period, the mixture of petroleum vapour and
air is driven back into the evaporator c, and the richer mixture already contained in the
upper part of the evaporator is ignited by its contact with the tube 1.
On the opposite side of the valve base is mounted a valve casing e which contains
the exhaust valve V, and is connected with a small cylinder f containing a piston g and
a helical spring h surrounding the piston rod. The top of the cylinder f communicates
with the valve base 6 through a tube r, when the valve is open, which valve serves for
periodically establishing and cutting off communication between the upper part of
the cylinder and the valve base b.
At every revolution of the crank shaft the valve v is lifted (or the corresponding
stop cock turned) by the engine, so that after the working stroke, the gases of
combustion which have still a pressure of about three atmospheres, act on the
piston in opposition to the spring h, and as the piston has a larger diameter than
the valve V the latter will move downward, so as to open the passage. When
the valve closes, the spring h will press the piston upward and close V2. The
mechanism for lifting the valve v is not shown by the drawings.
As all the valves are mounted on a common base, which can be screwed to the
rear end of the power cylinder, the various parts are easily accessible; the new
arrangement also serves to produce a good combustible mixture, and as the tooth
wheels, shafts and rods usually employed for operating the exhaust valve and the oil
pump are dispensed with, the weight of the engine is much reduced, and the working
is almost noiseless.
As described above, the evaporator is divided into two compartments, the lower of
which contains the internally heated igniting tube; consequently, the best mixture is
always near the point of ignition. Moreover, the heating surface of the igniting tube
is large enough, to ignite even an inferior mixture (as regards its inflammability).
The principal advantage, however, is that a motor provided with the new
arrangement of valves may be worked equally well with gas or benzoline, and with
petroleum.
Having now particularly described and ascertained the nature of our said.
Invention and in what manner the same is to be performed, we declare that what
we claim is :
1. An oil engine having an air supply valve, an exhaust valve and an evaporator
mounted on the same base which is adapted to be secured to the rear end of the
combustion chamber or power cylinder, substantially as described.
2. An oil engine having an oil feed pump connected with and adapted to be
operated by the spindle of the air supply valve, substantially as described.
3. In an oil engine, an evaporating chamber divided into two compartments, the
first compartment being situated above the point of ignition and the second
compartment being traversed by an internally heated igniting tube, substantially as
described.
4. In oil engines, an internally heated igniting tube open at both ends,
substantially as described.

page_text: 5. In oil and gas engines, an exhaust-valve adapted to be opened by the pressure
of the combustible gas mixture, with the aid of a periodically opened valve or cock,
substantially as described.
Tinted this old downf T.... 1007
FAIRFAX & WETTER,
37 and 39, Essex Street, Strand, London, Agents.