IMPROVEMENTS IN GAS OR OIL MOTORS
Year: 1884

page_text: PROVISIONAL SPECIFICATION,
I LORENTZ ALBERT GROTH K.G.V. Civil Engineer and Managing Director of
the Universal Inventors and Patentees Financial Company Limited 30 Finsbury.
Pavement London E.C. do hereby declare the nature of said Invention for
"IMPROVEMENTS IN GAS OR OIL MOTORS" a communication to me from abroad
by G. Daimler of Cannstatt in the German Empire to be as follows:-
These improvements in gas or oil motors consist in a contrivance to press air
mixed with combustible substances i.e. 1st Air mixed with combustible gases
2nd Air mixed with the residue of distilled petroleum either in a solid or vaporous
forn or 3rd Air mixed with coal dust and gas or products of petroleum in a
confined space at the end of a cylinder so quickly together and against the warm
sides of the space that at the end of the piston stroke by the effect of the com-
pression a spontaneous ignition as it were a pneumatic ignition takes place and a
quick combustion or explosion ensues through the whole mass of the mixture and
to employ the tension thus obtained as moving power.
The piston moves airtight in the cylinder one end of which is closed by a head
or cap covered by bad conductors of heat. By the outstroke of the piston air
mixed with gas or oil is sucked in or pressed in by a valve and by the instroke of
the piston the mixture is pressed into the space behind the piston and ignites at
the completion of its stroke as above described.
By the combustion and expansion of the mixture the piston is driven back
with considerable force and can then transfer this power by cranks or other
contrivances.
By the instroke of the piston the products of combustion are wholly or partly
driven out through a valve whereupon a fresh cycle begins.
After some repetitions of this motion the sides of the space and the bottom of
the piston obtain a normal heightened temperature in which the mixture regularly
ignites in or round the dead point of the length of the piston stroke in the inmost
position of the piston in consequence of the compression according to the principle
derived from experience that combustible mixtures which under the pressure of the
atmosphere would either not at all or only slowly burn do by vigorous compression
quickly burn and even explode.
It is also possible to keep the whole or part of the space of combustion cool

page_text: That the mixture may also explode at the beginning of the working when the
sides of the space are quite cold a metallic priming cap the interior of which is in
continuous open communication with the space of combustion is by means of a
flame from without so heated that ignition takes place thus when the cylinder and
the mixture are both cold the temperature necessary for ignition is obtained from
the heated sides of the priming cap.
The advantages of the invention described above are a heightened useful effect
of combustibles as :-
1st By the compression heightened into spontaneous ignition and the hot sides of
the cylinder bad and cheap combustibles are made to burn.
2nd Both during the compression and combustion within warmed sides little heat
is lost and from the almost unlimited quickness with which the motor can work
owing to the automatic ignition.
3rd No cooling water is required.

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Improvements in Gas or Oil Motors,
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oltareCOMPLETE SPECIFICATION.i
I LORENTZ ALBERT GROTH K.G.V. Civil Engineer and Managing. Director of
the Universal Inventors and Patentees Financial Company Limited, 30 Finsbury
Pavement, London E.C. do hereby declare the nature of said invention- for
"IMPROVEMENTS IN GAS OR OIL MOTORS "a-communication to me from abroad
by Gottlieb Daimler of Cannstatt in the German Empire and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:-
L
These improvements in gas and oil motive power engines consist in pressing
quickly a mixture of air and gas or oil vapours into a closed hot chamber by means
of the working piston until the said mixture is ignited by the combined action of
the compression and the heat of the walls of the chamber the expansion resulting
from the explosion or sudden combustion of the mixture being employed as driving
power.
According to this invention the motion of the crank is used for effecting the
ignition.
The piston B Fig 1 Plate I connected with the crank draws in by its first out-
stroke a proportionate mixture of air and gas or oil vapour which mixture is.
pressed by the first return stroke of the piston into a chamber c where it takes fire
at the point of highest compression and then operates during the second outstroke
of the piston to communicate power to the crank shaft and is afterwards exhausted
during the second return stroke of the piston. The action of the piston is therefore
similar to that of the so called Otto gas engine.
After some repetitions of this motion the sides of the space and the bottom of
the piston obtain a normal heightened temperature in which the mixture regularly
ignites in or round the dead point of the length of the piston stroke in the inmost
position of the piston in consequence of the compression according to the principle
derived from experience that combustible mixtures which under the pressure of the
atmosphere would either not at all or only slowly burn do by vigorous compression
quickly burn and even explode.
That the mixture may also explode at the beginning of the working when the
sides of the space are quite cold a metallic priming capf the interior of which is in
continuous open communication with the space of combustion is by means of a
flame from without so heated that ignition takes place from the heated sides of the
priming cap.
The advantages of the invention described above are a heightened useful effect
of combustibles as:
1st By the compression heightened into spontaneous ignition and the hot sides of
the chamber bad and cheap combustibles are made to burn.
2nd Both during the compression and combustion within warmed sides, little
heat is lost and from the almost unlimited quickness with which the motor can
work owing to the automatic ignition.
3 No cooling water is required.

page_text: Having now particularly described and ascertained the nature of said “inven.
tion and in what manner the same is to be performed I. declare that what
I claim is
1st In gas motors in which only one impulse is given for each two strokes of the
working piston, the effecting of the automatic ignition of the combustible mixture
at each second stroke by the compression against the hot sides of the combustion
chamber by means of the movement of the crank of the working piston, and the
regulation of the ignition at the exact moment in relation to the dead point by the
cock a which admits more or less combustible mixture for the explosion charge or
by the cock t which regulates the heat of the igniting cap f substantially as herein-
before described and illustrated in the drawings.
2nd The use of the priming cap f for effecting the ignition when the sides of the
chamber are quite cold substantially as hereinbefore described and illustrated in
the drawings