Certain Improvements in Oil and Gas Engines.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Certain Improvements in Oil and Gas Engines.
I, EMILE LOUIS TOURNET, of 19, Cavendish Road, Birmingham, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention has reference to double cylinder oil and gas engines that is to
say those oil and gas engines which are provided with two cylinders arranged side
by side with their pistons and connecting rods working on to the same crank shaft
and this invention consists of the hereindescribed improved arrangement of
mechanism for operating the exhaust valves of the two cylinders.
I will describe my invention as applied to a horizontal engine but it is to be
understood that my invention is equally applicable to an engine which is vertical
or inclined at any angle.
In carrying out my invention the two engine cylinders are arranged horizontally
side by side with the exhaust valve spindles between the cylinders pointing
towards the crank shaft. Between the crank shaft and the exhaust valve spindles
and about midway between the latter I provide a horizontal slide which receives a
to and fro motion from the crank shaft by means of a connecting rod or other
equivalent device. Jointed to this slide there is a tappet rod which is made long
enough to reach and actuate the exhaust valve spindles this tappet rod being so
jointed to the slide as to be capable of swinging to and fro in a horizontal plane
and acting first on one exhaust valve spindle and then on the other exhaust valve
spindle as the engine revolves. In order to effect the to and fro sideways movement
of the outer end of the tappet rod I provide a swinging cam plate which is adapted
to turn about its centre in a horizontal plane underneath the tappet rod. This
swinging cam plate is made with a cross slot or groove in which works a roller or
pin fixed to the tappet rod at the underside and near the outer end of the same.
The said slot or groove in the tappet is a little longer than the horizontal distance
between the two valve stalks so that as the slide and tappet rod are moved to and
fro by the revolving of the crank shaft the roller or pin of the tappet rod travels
to and fro along the cam plate and engages in one or other end of the slide and
turns the same backwards and forwards about its axis.
The mechanism above described for operating the two exhaust valves alternately
at the proper times acts as follows:-
Assuming that the said slide is in its farthest forward position and is about to
move backwardly for the tappet rod to push in the exhaust valve stalk or spindle
to open the exhaust valve, the pin or roller on the underside of the tappet rod will
be engaging in the right hand end of the swinging link and as the slide moves
forward this roller catches into the notch or recess in the said slot so that as the
slide makes its backward movement the said roller being retained in the slot is
by the cam plate properly directed towards and pressed against the end of the
exhaust valve stalk which the said tappet ultimately strikes and pushes inwardly
so as to open the exhaust valve. The said sliding cam plate has now turned into
an inclined direction and as the forward movement of the slide continues the roller

page_text: or pin on the underside of the tappet rod moves down the inclined slot of the cam
piate thus causing the tappet rod to swing over and point towards the left hand
exhaust valve spindle until the said roller rests at the end of the slot in the cam
plate. As the said slide commences to move backwardly again, the roller on the
tappet rod engages in the recess in the left hand end of the slot of the cam plate
thus turning the cam plate again which latter strikes the tappet rod towards the
left hand exhaust valve spindle which the tappet rod ultimately strikes and pushes
inwardly so as to open the exhaust valves at the proper times. Thus as the rotary
motion of the crank shaft continues the tappet rod receives a combined to and fro
motion from the slide and a sideways movement by reason of its engaging with the
swinging cam plate so that the said tappet rod strikes one exhaust valve spindle
and then the other exhaust valve spindle as is required when the engine is at work.
Dated this 8th day of March 1897.,
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
Certain improvements in on and Gas Engines.
I, EMILE LOUIS TOURNET, of 318, Dudley Road, late of 19, Cavendish Road,
Birmingham, 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 has reference to double cylinder oil and gas engines that is to say
those oil and gas engines which are provided with two cylinders arranged side by
side with their pistons and connecting rods working on to the same crank shaft
and this invention consists of the herein described improved arrangement of
mechanism for operating the exhaust valves of the two cylinders so as to open each
valve at every other revolution of the crank shaft.
I will describe my invention as applied to a horizontal engine but it is to be
understood that my invention is equally applicable to an engine which is vertical
or inclined at any angle.
On the accompanying drawing Fig. 1 is a sectional plan of a horizontal oil and
gas engine with my invention applied; Fig. 2 is a sectional side elevation of the
same; Figs. 3, 4 and 5 illustrate the operation of my exhaust valve actuating
mechanism; and Figs. 6 and 7 illustrate parts of the said mechanism separately.
The same letters of reference indicate the same parts in all the figures.
A¹A² are the two engine cylinders arranged horizontally side by side, 1 is the
crank shaft on to which the connecting rods C work. D₁ is the exhaust valve for
the cylinder A¹ and D2 is the exhaust valve for the cylinder A².
These exhaust valves are arranged side by side and each is provided
with a spindle marked respectively projecting towards the crank
shaft and the exhaust valves have to be opened one after the other in the working
of the engine to allow of the escape of the products of combustion from the cylinders.
Between the crank shaft. B and the exhaust valve spindles d' d² and about mid-way
between the latter I provide a horizontal slide E which is suitably guided by the
engine frame F and receives to and fro motion from the crank shaft B by means
of the eccentric G and eccentric strap H which at his jointed to the slide E. Or
any other equivalent device may be provided for imparting a to and fro motion to
the slide E from the crank shaft B. Jointed at e¹ to the slide E there is a tappet
rod I which is made long enough to reach the ends of the exhaust valve spindles d' dª

page_text: this tappet rod I being so jointed to the slide E as to be capable of a swinging to
and fro movement in a horizontal plane and acting first on one exhaust valve
spindle and then on the other exhaust valve spindle d as the engine revolves.
In Figs. 1 and 2 the tappet rod I is represented as acting on the exhaust valve
spindle dopening the exhaust valve D³. In order to effect the to and fro side-
ways movement of the outer end i of the tappet rod I, I provide a swinging cam
plate J (shewn separately by Fig. 6) which is adapted to turn about its centre
spindle in a horizontal plane underneath the tappet rod I. This spindle j¹ of
the swinging cam plate J turns in a bearing f¹ formed with or forming part of the
engine frame F. This swinging cam plate J is made with a cross slot or groove j
in which works a roller or pin fixed on the tappet rod I at the underside and
near to the outer end of the same. The slot or groove j² in the swinging cam
plate J is made with a recess at each end (said recesses being marked respect-
ively 3) at that side nearest to the other end of the tappet rod I and with
which recesses the pin or roller will engage in. On the spindle j¹ of the swinging
cam plate J there is a coiled wire or other spring k the tension of which can be
adjusted so as to prevent the cam plate J from swinging too freely. As the slide E
and the tappet rod I are moved to and fro by the eccentric G and eccentric strap H
during the revolving of the crank shaft B the roller or pin of the tappet rod I
travels to and fro along the slot 2 of the cam plate J and engages in one or other
of the end recesses in the slot and turns the cam plate J backwards and
forwards about its axis j¹.
The mechanism above described for operating the two exhaust valve stalks d¹ d²
and opening the exhaust valves D¹ D³ alternately at the proper times acts as
follows:-
Assuming that the slide E is at that end of its stroke nearer to the crank
shaft B and is about to move backwards towards the cylinder for the tappet rod to
push in the exhaust valve spindle to open the exhaust valve D', the pin or
roller on the underside of the tappet rod I will be engaging in the right hand
end of the swinging cam plate J as represented by Fig. 3 and as the slide E moves
backwardly towards the cylinders the roller catches into the notch or recess j³
and the tappet rod I is properly directed towards and presses against the end of the
exhaust valve spindle which the tappet rod I ultimately strikes and pushes
inwardly as represented in Fig. 4 so as to open the exhaust valve. It will be seen
that the sliding cam plate J has now turned into an inclined direction. When the
slide E with the tappet rod I commences to move forward again towards the crank
shaft B the pin or roller on the tappet rod I moves down the inclined slot
of the swinging cam plate J thus causing the tappet rod I to swing over and point
towards the left hand exhaust valve spindle until the roller rests at the end
of the slot as represented by Fig. 5. As the slide E and tappet rod I commence
to move backwardly again towards the cylinders the roller on the tappet rod I
engages in the recess in the left hand end of the slot of the cam plate J thus
turning the cam plate J again to the position represented in Fig. 1 so that the
cam plate J directs the tappet rod I towards the left hand exhaust spindle & which
the tappet rod ultimately strikes and pushes inwardly so as to open the exhaust
valve D² as represented by Fig. 1 at the proper times.
Thus as the rotary motion of the crank shaft B continues, the tappet rod I
receives a combined to and fro motion from the slide E and a sideways movement
by reason of its engaging with the swinging cam plate J so that the tappet rod
strikes the exhaust valve spindles & alternately and thus opens each of the
exhaust valves D1 D2 ouce at every two revolutions of the crank shaft as required
when the engine is at work.
Each of the exhaust valve spindles d' is fitted with a coiled wire or other spring
(which springs are marked respectively 12) each of which acts between a collar
on the valve stalk and the front of the valve box m so as to close the exhaust
valves D1 D2 and maintain them closed after they have been opened by the tappet
rod I.

page_text: It will be evident that my invention may be applied to a vertical oil or gas
engine or to an oil or gas engine which is inclined at any angle similarly as above
described and illustrated as applied to a horizontal oil and gas engine.
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:
In double cylinder oil and gas engines the employment with the two exhaust
valves arranged side by side of the mechanism herein described for opening each
of the exhaust valves once at every two revolutions of the crank shaft, consisting
of a slide which receives a to and fro motion from the crank shaft by an eccentric
and strap or the like, the tappet rod I jointed to said slide and moving with it,
the swinging cam plate with which the outer end of the tappet rod engages and
which imparts a sideways swinging movement to the tappet rod so that as the slide
and tappet rod advance towards the exhaust valves the tappet rod strikes the exhaust
valve spindles alternately and each exhaust valve is opened once at every two
revolutions of the crank shaft, substantially as described.
D. 1141
Daramban 1007
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.