Improvements in and relating to Oil and Gas Motors.
Year: 1898

page_text: Date of Application, 23rd Apr., 1898-Accepted, 4th June, 1898
COMPLETE SPECIFICATION.
Improvements in and relating to Oil and Gas Motors.
I, DAGOBERT TIMAR, of 27/28 Luisenstrasse, Berlin, N.W., Engineer, 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:-
This invention relates to a one-cylinder two-stroke cycle explosion motor in which
by the avoidance of the use of special valve mechanism, in combination with an
excellent ventilation of the combustion-space of the cylinder after the explosion,
the use of very high speeds of revolution is effected with absolute safety in
working.
The invention is illustrated in the accompanying drawings in which Figure 1
Sheet No. 1 is a view in front elevation-partly in section-of a two-stroke cycle
explosion motor, and Figure 2 Sheet No. 2 is a similar view of a modified form of
motor.
The possibility of dispensing with the use of special valve mechanism is effected
in the subject of the present invention by the fact that the piston of the motor
itself is utilised for distributing purposes by the arrangement of passages in the
same. Further, provision is also intentionally made to insure that the entrance
of the fresh combustible gases shall always take place at the uppermost portion
of the cylinder, whereby they are caused to remain pure and unmixed with any
products of combustion that may have been left behind in the cylinder, and
by this means, and in combination with the powerful igniting device which
is also situated within this upper part are caused to explode or burn rapidly and
completely.
In the form of construction of the motor shown in Figure 1, the cylinder a (which
is provided as usual with cooling water passages) is also provided with the unions d
and g, of which 9 serves for the entrance of the working gas, and d for the exit
of the products of combustion, and with an automatically acting air inlet valve h.
The piston 6 of the gas motor is provided with two passages c and e of. which
both are directed at an angle and open at the top through the piston into the
cylinder space. The one passage e coincides with the gas inlet union g at the
lowermost position of the piston, and is extended upwards by means of a pipe f in
such a manner that at the uppermost position of the piston the said pipe f almost
meets against the cylinder cover. The other passage c of the piston 6 on the
contrary coincides each time the motor or piston is in its middle position, with the
exhaust union d. The mode of operation of the motor can be clearly seen from the
drawing.
In the position shown in Figure 1, the piston b in driving the motor, first
closes two apertures, thereby producing a vacuum in the space above the cylinder,
so that air enters through the air inlet valve h into the piston space, until
the passage e at the lowermost position of the piston coincides with the gas inlet
union g, so that the necessary quantity of gas enters from the said union g

page_text: through e and the pipe finto the upper part of the cylinder, and in consequence
of its violent inflow inixes there with the air contained therein to form an explosive
mixture.
As the motor continues to rotate, the returning piston after closing the passage e
first causes compression in the cylinder space, and after the completion of the
same, the explosion is produced, by means of a hot tube or other firing device,
whereby the piston is projected forward. When the passage c coincides with the
exhaust union d, the gases of combustion of the last explosion escape, and by
the further movement of the piston the above mentioned vacuum is again produced
in the cylinder space, and the aforesaid cycle of operations continues, when the gas
valve is opened, anew, and thus keeps the motor in motion. The advantages of
the gas motors constructed according to the present invention without special
valve mechanism, consist above all in the absolute safety of working, the possibility
of reaching a high speed of revolution, cheapness of manufacture, and ease
in starting the motor, all of which advantages contribute to render the cost of
working cheaper by the fact that the attendant in charge of the motor may be less
highly trained.
Figure 2 illustrates a somewhat modified and simplified arrangement, which is
however based on the same principle. In this case also the cylinder a is provided with
cooling passages and with an air inlet valve / as shown in Figure 1. The
unions g and g¹ employed in this arrangement serve for the entrance of the gas
which is effected through the passage h¹ and the pipe into the upper cylinder
space.
'
During this operation the exhaust of the products of combustion is effected quite
automatically through the automatic exhaust valve k which opens outwardly and is
caused to operate by reason of its position in the cylinder which is such that it is
uncovered when the piston is situated slightly below its middle position. The
freshly inflowing gases remain meanwhile (by reason of their specific gravity which
is considerably smaller than that of the products of combustion) in the upper part
of the cylinder, so that exclusively products of combustion do actually escape through
the valve k.
In all other respects the mode of operation of the motor is exactly similar to that
of the arrangement shown in Figure 1.
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
(1) A one-cylinder two-stroke cycle explosion motor without special valve
mechanism, characterised by the fact that the piston (which is formed with a passage e
bent at right angles and led upwards through the pipe f, and with a passage c which
is also bent upwards and which terminates at the bottom of the piston) is caused by
the change in its position to communicate or coincide alternately with the gas
inlet union g and with the exhaust union d, the arrangement being such that when
the piston moves forward air enters, and when the passage e coincides with the gas
inlet union g, gas enters, whilst on the return movement of the piston the gas
mixture is compressed and then ignited and whilst also during the now following
repeated forward stroke of the piston, the products of combustion are expelled. when
the passage e coincides with the union d, as set forth.
(2) A form of construction of the motor specified in Claim 1, characterised
by the fact that the passage e of the form of construction specified in Claim 1,
is replaced by a pipe i, the arrangement being such that the two unions g and gi
allow of the entrance of the gas through the medium of the passage h¹ and of
the pipe i, whilst the exhaust of the products of combustion is effected quite
automatically.through the exhaust valve k after the piston has moved forward through
half its stroke, as set forth.
(3) The improved gas or oil motor, substantially as hereinbefore described with
reference to Figure 1 of the accompanying drawings.

page_text: (4) The improved gas or oil motor substantially as herein before described with
reference to Figure 2 of the accompanying drawings.
Dated this 23rd day of April 1898.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer & Patent Agent,
70, Chancery Lane, London, W.C., Associate Agent.