Year: 1896

page_text: Date of Application, 29th Aug., 1896.
Complete Specification Left, 27th May, 1897-Accepted, 3rd July, 1897
I, ARTHUR GRELET, of 22 Rue de Paris, Puteaux, Seine, France; Engineer;
do hereby declare the nature of this invention to be as follows:-
This invention relates to an explosion motor applicable for gas or petroleum, and
of the four-stroke cycle compression type.
The motor consists of two open cylinders each having two pistons moving in-
versely and transmitting the motive power to a crank shaft by means of two bean
levers and two connecting rods.
Each of the cylinders is provided with a distributing valve enclosing an ad-
mission valve for the explosive mixture, working automatically, and an escapement
valve worked by means of a cam fixed on a worm on the main shaft which gears
with a worm wheel loose on the end of the valve spindle, and depresses the latter
at every second revolution of the main shaft, thereby operating the escapement
The cylinders are water jacketted, and when working with petroleum, the
carburetter usually employed is dispensed with, the petroleum falling in small
quantities, measured by a valve operated by a lever connected with the escapement
valve, into a space surrounding one of the cylinders where it is vapourized.
The cycle is as follows:-The two pistons of one of the cylindors are drawn out
in opposite directions thereby admitting the charge, which is compressed between
them by the return stroke. The explosion then takes place and forces the pistons
outwards again, and on the back stroke the burnt gases are expelled. During
this time the same phases are produced in the other cyclinder, but inversely, and
the motive power is transmitted to the main shaft by the connecting rods and
cranks.
1000
I, ARTHUR GRELET, of 22 Rue de l'aris, Puteaux, Seine, 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 follow-
ing statement:-
This invention relates to an explosion motor applicable for gas or petroleum, and
of the four-stroke cycle compression type.
The motor consists of two open cylinders each having two pistons moving in-
versely and transmitting the motive power to a crank shaft by means of two heam
levers and two connecting rods.
Each of the cylinders is provided with a distributing valve enclosing an ad-
mission valve for the explosive mixture, working automatically, and an escapement
ונ..

page_text: valve worked by means of a cam fixed ou a worm on the main shaft which gear
with a worm wheel loose on the end of the valve spindle, and depresses the latter
at every second revolution of the main shaft, thereby operating the escapement
valve.
The cylinders are water jacketted, and when working with petroleum, the car
buretter usually employed is dispensed with, the petroleum falling in small
quantities measured by a valve operated by a lever connected with the escapement
valve into a space surrounding one of the cyclinders where it is vapourised.
The motor is illustrated in the accompanying drawings Fig 1 is a half sectional
elevation, Fig 2 is a plan, and Fig 3 is an end elevation. Fig 4 represents in
elevation and vertical section the cam controlling the escapement valves. The
same letters of reference where they occur are used to denote the same parts in
the various figures.
The lower cylinder a forms the base framework of the motor and is fixed by
means of four feet 6, and carries vertical brackets furnished with bearings for
the crank shaft c. The upper eylinder d parallel to the eyelinder a is carried iy
two uprights ee connected with the cylinder a, said uprights having bearings to
receive the axles o o' of the beum levers f
The pistons 9 g and h h are connected with and transmit their movement to
the beam levers, which latter communicate it in their turn to the crank shaft e by
means of the two connecting rods i i.
The two distributing valves jį each enclose:first, an admission valve
allowing the entry of air on the one side at 1 and of gas on the other side at m.
These valves open automatically when a vacuum is produced by the drawing out
of the pistons and are closed by means of springs. Second an escapement valve
y opening at each second revolution of the main shaft.
In order to ahviate the cog wheel arrangement usually employed, which com-
plicates the mechanism and causes noise, we have adopted the following arrange-
ment for operating the escapement valves q, which armngement is illustrated in
Fig 4.
An endless screw or worm & is wedged on the crank shaft c; this scrow is
furnished with a cam projection t which gears at every second revolution with the
worin wheel loose on its axis u, which is carried at the extremity of the valve y
forcing the latter to open. In order that the opening should only occur once in
every two revolutions of the crank shaft c, alternate notches of the teeth of the
worm wheel are cut deeper than the others; the notches y are cut of the depth
of the worm s, the other notches r being of the depth of the cam t. Every time
that the cam comes before a deep cut notch the worm wheel is not depressed:
on the contrary every time that it comes before a normal notch y, it acts on the
worm wheel and the valve q is opened to a distance equal to the height of the
projection t
As the worm gears continually in the worm wheel the latter advances one
tooth at each revolution and presents alternately the notches and y to the cam /.
Springs reclose the escapement valves g.
The cooling of the cylinders is obtained by a circulation of water in a water
jacket a 3.
For the admission of gas it is sufficient to connect the inleta m of the admission
valves p, with a gas supply pipe.
When working with petroleum, a part 2 of the water jacket [but separate from
same] is utilized.
The petroleum entering by the tube a falls by small quantites on the hot part
of the cylinder in a 2 where it vapourizes and is drawn in by the movement of the
piston passing by the admission valve p. The measuring of the quantity of the
explosive mixture is effected at the entrance of the admission valves.
The quantity of the petroleum passing through the tube n is regulated by means
of a valve a, operated by a lever z worked by the shaft of the escapement valve g.
The burnt gases pass off by the outlets & to enter a receiver.

page_text: The two pistons of one of the cyclinders are drawn out in opposite directions
thereby admitting the charge, which is compressed between them by the return
stroke. The explosion then takes place and forces the pistons outwards again,
and on the back stroke the burnt gases are oxpelled. During this time the same
phases are produced in the other cylinder, but inversely, and the motive power is
trausmitted to the main shaft by the connecting rods and cranks.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I claim
is:-
1. An explosion motor, the construction of which is based on the arrangement
of one or more series of horizontal cylinders parallel to each other and superposed
in pairs, each containing two pistons, as herein before described, the motion of
these two pistons on the driving shaft being regulated by means of beams and
connecting rods, arranged in opposite directions in such a manner as to secure a
continual and balanced working substantially as described and illustrated.
2. In an explosion motor of the kind indicated in the preceding claim means
for operating tho valves direct from the driving shaft substantially as hereinbefore
described and illustrated in Figs 3 and 4 of the accompanying drawings and for the
purpose stated.
3. In a petroleum explosion motor the means herein described for vapourizing
the petroleum by causing it to fall upon the heated outside walls of the cylinder
substantially as and for the purpose hereinbefore described and illustrated in the
accompanying drawings.
Dated this 27th day of May 1897.
F. W. GOLBY,
36 Chancery Lane, London, W.C.
Patent Agent for the Applicant.