Year: 1888

page_text: Date of Application, 28th Aug., 1888
Specification Accepted, 12th Oct., 1888
I, LOUIS CHARON of Solre-le-Chateau, in the Republic of France, Mechanic,
lo 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:
I, LOUIS CHARON of Solre-le-Chateau, in the Republic of France, Mechanic,
lo 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 improved gas-motor differs from the gas-motors known up to the present time
in the following points:
1. The variable expansion regulated by the governor.
2. The spiral or straight tube.
3. The igniting mechanism.
4. The automatic lubricator.
In the accompanying drawings:
Figs. 1, 2 and 3 represent an elevation, plan and end view respectively of part of a
gas-motor constructed according to this invention and in these figures N is the valve
of the gas supply pipe, provided with an indicator moving on a graduated circle, K is
the compression or combustion chamber with inlet valve, J is a sleeve on which are
fitted the escape cam and the cam operating the commutator, Z a bracket, B lubri-
cator, D cylinder, I movable sleeve, R guide plate, S discharge pipe, M spiral tube
serving as inlet and as reservoir for the combustible mixture not used; this tube may
however be straight; Q shaft transmitting motion to the inlet and outlet valves.
W conduit for the gas from the valve N to the combustion chamber, L outlet chamber
with valve, G governor, Y Y' lover arms for regulating the supply of gas to the com-
pression chamber.
Figs. 4 and 5 represent the combustion chamber. B' is a porcelain cylinder
traversed by a copper wire. A A' are terminals for the wires of an electric coil,
oo are electrodes, S is a valve.
Fig. 6 represents the diffuser.
a is the end of the tube next to the valve and
1, 2, 3 etc. are the diffusing channels.
Figs. 7 and 8 represent the automatic lubricator. is a bobbing float, I is a metal
blade serving as guide for the lubricant, T is the outflow tube.

page_text: Figs. 9 and 10 represent the slide.
slots, is the rod operating the slide.
Fig. 11 represents the commutator.
the circuit and p is an indicator hand.
3 is the. slide covering and uncovering the
P is a steel roller, a metal blade for closing
Fig. 12 represents a movable sleeve I and Fig. 13 a fixed sleeve, is the cam for
the escape valve and the cam groove for guiding the commutator.
Fig. 14 represents the arm for transmitting the cam action to the valves. a³ is the
arm for the rodu, ³ the arm for the rod y, ca the arm operating the inlet valve and d³
the arm operating the outlet valve L.
The piston of the motor during its forward movement representing a half revolution
of the driving shaft sucks in a mixture of air and gas. During this half revolution
the cam lifts the arm Y, the arm Y¹ operates the rod of the slide which uncovers
the slots leaving a passage for the gas for a longer or shorter time according to the
position of the governor. The cam P of the sleeve J operates the rod through an
antifriction roller and transmits the movement to the inlet valve K. This latter is
lifted to let atmospheric air enter through the spiral tube M and the gas enter through
the opening at in the seat of the valve e¹.
The series of small openings a remain open while the valve is lifted the gas slide
being open at the same time the gas flows into the circular groove and enters through
the small holes to mix with the atmospheric air entering through the spiral tube M.
The lower end of this spiral tube opens into the chamber of the motor and communi-
cates with the outer air. In this manner a homogeneous and combustible mixture of
air and gas is obtained.
When the crank comes to its dead point the cam O has left the arm Y and conse-
quently the gas slide recloses under the influence of a spiral spring. The cam P still
holding the valve e open the piston on its return stroke drives into the spiral tube M
the excess of combustible mixture that is to say that which is not used during
this stroke so that it can be used during the next stroke; hence a great saving of
gas.
This excess of the combustible mixture varies according to the power absorbed by
the working of the motor, and this power depends upon the more or less rapid closing
of the valve. The governor by means of the step or conical cam P regulates the
closing of this valve. This closing always takes place between and of the back
stroke and thus the volume of the combustible mixture driven into the spiral tube
varies between and of the volume drawn into the cylinder. As soon as the valve
is closed the piston by continuing its stroke, compresses the part of the mixture
remaining in the cylinder. This compression is variable and its minimum is two
kilogrammes per square centimetre. Thus the mixture is fully compressed when the
crank bas finished its second half revolution and at this moment the electric spark
passes between the points o' and of in the compression chamber and ignites the com-
bustible mixture. The elevation of the temperature resulting from the combustion
expands the gas which pushes the piston forward during the third half revolution
of the crank. When the crank arrives at its extreme point the outlet valve I is
opened by means of the cam so that when the piston returns it drives the
products of combustion through the valve L which remains open during the whole
of the back stroke of the piston at the end of which it closes.
The piston moves again forward and sucks in first the excess of the mixture
previously driven into the spiral tube and then a fresh supply of gas to complete
the necessary quantity. During its back stroke the piston again drives the fresh
excess into the spiral tube and so on periodically every two revolutions of the
driving shaft.
•
The cam O operating the slide for the admission of the gas is formed with steps or
conically so as to regulate the admission of gas according to the quantity of excess
of the combustible mixture previously driven into the spiral tube.
The two cams O and P are of the same form and pitch and are mounted on the
same sleeve and are consequently simultaneously operated by the governor.

page_text: The electric spark passes at the right moment and is dependent on a commutator
of the following construction.
The cominutator carries a handle and a pointer indicates on a graduated quadrant
the precise moment when the spark is to pass.
The axis of the handle is in form
of an eccentric which operates the axle of the balance beam. Thus the spark can be
regulated by a simple movement of the handle. The balance beam sliding with the
axle is operated by the cam groove of the sleeve J and according to the position of
the handle the balance beam will be acted upon more or less quickly.
The motion of this gas-motor is silent and perfectly regular and it can be worked
with gas or with carburetted air or gasoline or the like.
The consumption of gas is very small, for a two horse motor it only consumes
600 litres per horse, for those of higher horse power the consumption per horse
power is further reduced.
The cost for the lubricant is only 14 penny per day.
The wear and tear is insignificant and worn out paris can be easily and cheaply
replaced.
The vertical arrangement of the spiral tube assures the discharge of any condensed
steam.
The explosion taking place in a special chamber the piston does not become foul
and consequently does not wear out the cylinders so quickly.
The low temperature consequent on the explosion produces but little discharge of
condensed steam and the small dimensions of the compression chamber avoid all
danger of explosion.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a gas-motor the variable expansion regulated by the governor substantially
as and operating in the manner herein described and illustrated in the accom
panying drawings.
2. In a gas motor the spiral or straight tube M assisting in the expansion
substantially as herein described and illustrated in the accompanying drawings.
3. In a gas motor the igniting mechanism with its regulator substantially as
herein described and illustrated in the accompanying drawings.
4. In a gas motor the automatic lubricator substantially as herein described and
illustrated in the accompanying drawings.
Dated thi- 58th low of Angust 1888