improvements in as a like motors.
Year: 1899

page_text: improvements in as a like motors.
I, FRANÇOIS LAGOUTTE, of 67, Rue Gravel (Levallois Perret-Seine), in the
Republic of France, 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 explosion motor of the two cycle system, and
I have illustrated the general idea of my improved motor in the accompanying
drawing, in which:-
Figure 1 is a section taken in the plane passing through the axes of the motor
cylinder and the pump barrel, and
Figure 2 is a section taken at right angles to Figure 1 but with the piston
at the end of its stroke.
The improved motor consists mainly of two cylinders A and B opening at one
end into a box frame C common to both.
The cylinder A is the motor cylinder strictly speaking, and is fitted with a
piston D to which is directly articulated the connecting rod d acting upon the
crank e of the driving shaft E which is suifably supported in bearings in the
box frame C. The other cylinder B constitutes the pump barrel for effecting
the suction and the injection of gaseous mixture, it is fitted with a piston or
plunger F driven by the crank e through the intervention of a connecting rod f.
The cylinder A can be brought into communication with the pump B through
a valve
and pipe G. The pump cylinder is provided with a valve H permitting
the admission of the gaseous mixture from a carburettor or from any other
suitable apparatus capable of preparing the mixture. The arrangement shown
in the drawings is designed for the use of liquid hydrocarbons and it consists
in a small channel I supplying the liquid to the seat of the valve H. The flow
is regulated by a pointed valve i; it is to be understood that this particular
arrangement merely shown by way of an example and that I do not limit my
invention thereto.
The ignition of the mixture in the motor cylinder may be operated by any
convenient means or device, such as incandescent tube, ignition chamber,
electricity. I have also shown in the drawings by way of example means for
closing the circuit when the ignition is obtained by electricity. These means

page_text: comprise a cam J fixed upon the driving shaft and arranged to act at each
revolution upon a stud K which is guided in a sleeve and held in its normal
position by a spring k
In the cylinder A near the end of the stroke of its piston D there are provided
openings aa leading into an annular chamber a from which a pipe suitably
arranged, leads off the exhaust gases.
The improved motor operates in the following manner. Supposing the
piston D to be at the inner end of its stroke near the cylinder cover and having
just compressed the charge of gas mixture, if now ignition takes place an
explosion is produced the piston is driven outward to the end of its stroke
thereby uncovering the openings aa and allowing the exhaust to take place
which lasts until the time the piston D returns and completely covers the said
openings aa.
It is to be pointed out that, notwithstanding the shortness of the exhaust
openings aa exhaustion continuous during nearly one third of the stroke owing
to the position of these openings near the end of the stroke.
During the exhaustion of the gases of explosion and also during the following
stroke the cylinder A is fitted with fresh mixture which is supplied as herein-
after described; the piston D during its instroke commences compressing the
mixture and continues to do so until its arrival near the bottom of the cylinder.
At this moment the charge is ignited and causes a fresh explosion which acts
upon the piston and this is repeated with an explosion for each revolution of
the driving shaft.
Referring now to the pump B the action is as follows: The pump barrel is
so arranged that when the motor piston is at the inner end of its stroke the
plunger of the pump has moved to about midway of its stroke. During the
outstroke the plunger F draws in the gaseous mixture wich then enters by the
valve H into the pump barrel B.
After the plunger has passed through a part of its stroke the motor piston D
arrives at the bottom of its cylinder and then starts on its outstroke and arriv-
ing at the end of which it uncovers the exhaust ports a aa as herein before
explained. During this time the plunger F of the pump has moved outward
to the end of its stroke and returns inward and thus drives the gaseous mixture
previously drawn into the pump barrel, through the pipe G into the cylinder A.
against the pressure of the valve g.
This period of injection lasts from the moment when the compression of the
mixture in the pump barrel overcomes the pressure of the explosion gases
in the motor cylinder and until after exhaustion the plunger F of the pump
has completed its instroke.
Thus the admission into the motor cylinder takes place with an increasing
pressure until the final compression of the fresh charge so started in both the
cylinder and in the pump, is completed in the motor cylinder alone.
I do not wish to limit myself to any of the details of construction and reserve
to myself the rights to modify and vary the parts as may be required.
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. An explosion motor of the two cycle system in which the aspiration and
part of the compression of the gaseous mixture are effected in a pump separate
from the motor cylinder and fitted with an independent plunger, such plunger
as also the motor piston being connected by separate connecting rods to a
crank common to both, substantially as hereinbefore described with reference
to the accompanying drawings.
2. An explosion motor as claimed in Claim 1, comprising a cylinder and a
pump barrel mounted upon a common box-frame in which revolves the driving
shaft the crank of which is connected by separate connecting rods to the motor

page_text: piston and to the pump plunger respectively, and exhaust ports in the motor
cylinder near the outer end of the piston stroke, the relative position of the
motor cylinder and pump barrel being such as to establish convenient com-
munication between the two on the one hand, while on the other hand enabling
the gas, drawn into the pump during the outstroke of the plunger and driven
towards the motor cylinder by the instroke of the plunger, to be admitted into
the motor cylinder during the exhaust of the gases of explosion, compression
of the fresh charge taking place simultaneously in the cylinder and in the
pump until the time the motor piston arrives near the end of its instroke and
completes the compression in the motor cylinder, substantially as herein before
specified and described with reference to the accompanying drawings.
3. The general arrangement, construction and combination of motor herein-
before described and shown.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.