Improvement in the Valve-gear of Gas-engines and Petroleum-engines.
Year: 1890

page_text: Date of Application, 9th July, 1890
Complete Specification Left, 21st Feb., 1891-Accepted, 21st Mar., 1891
PROVISIONAL SIECIFICATION.
Improvement in the Valve-gear of Gas-engines and
Petroleum-engines.
We, OTTO VOGELSANG, Engineer, of Plauen, near Dresden, and MORITZ HILLE,
of No 22, Chemnitzer Strasse, Dresden, in the Kingdom of Saxony, Engine-
manufacturer, do hereby declare the nature of this invention to be as follows:-
Our invention relates to the valve-gear of engines driven by the explosive
combustion of mixtures of air and lighting-gas or vapors of hydro-carbons, and the
improvement consists in the combination, with the admission-valve for gas or vapor,
of a suitably balanced lever, oscillated in one direction by the engine and in the
other by gravity, and through the medium whereof the operation of the admission-
valve is so controlled that the latter will be opened at every stroke of the slide-
valve or not, according as the engine runs at the ordinary or at an excessive
speed.
The mechanism is constructed as follows.
Opposite to the stem of the admission-valve and at some distance therefrom is
arranged a reciprocating finger, moving in a line with the said stem and synchron-
ously with the slide-valve. By the side of these parts is placed a lever capable of
oscillating by gravity and carrying a movable pin controlled by a spring, the lever
and the pin being so disposed that, when the lever is in a certain position, which I
shall call its operative position, the pin will be lengthwise between the stem of the
admission-valve and the reciprocating finger. The pin has such length that, under
the said conditions, the finger, on advancing, will press the pin against the valve-
stem and thus open the valve, the pin being pushed backward again by its spring
when the finger recedes. Sideward of the said lever there is an oscillating or
reciprocating tappet, which, at every stroke of the slide-valve, acts on the lever to
oscillate the same, so as to throw the pin out of line with the admission-
valve-stem and the reciprocating finger. The lever is, however, balanced in
such manner that, when the engine rims at the proper speed, the lever, after
having been swung out of its operative position, will return thereinto just in time to
be again acted upon by the reciprocating finger at its next forward stroke. The
admission-valve is in this case opened at every stroke of the slide-valve. But, if
the speed of the engine is too great, the lever, on oscillating backward, will be too
late for the pin to be engaged by the reciprocating finger; the admission-valve will
consequently then remain closed and the cylinder will not receive any charge of
explosive mixture. This skipping of charges continues until the engine has
reassumed its normal speed, whereupon the admission-valve is opened again
regularly.
T 1
1000
J. H. JOHNSON & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvement in the Valve-gear of Gas-engines and
Petroleum-engines.
We, OTTO VOGELSANG, of Plauen, near Dresden, Engineer, and MORITZ HILLE,
of No. 22, Chemnitzer Strasse, Dresden, Kingdom of Saxony, Manufacturer, 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 :-
Our invention relates to the valve-gear of engines driven by the explosive

page_text: combustion of mixtures of air and lighting-gas or vapors of hydro-carbons, and
the improvement consists in the combination, with the admission-valve for gas or
vapor, of a suitably balanced lever, oscillated in one direction by the engine and in
the other by gravity, and through the medium whereof the operation of the
admission-valve is so controlled that the latter will be opened at every stroke of the
slide-valve or not, according as the engine runs at the ordinary or at an excessive
speed.
The mechanism is constructed as follows.
Opposite to the stem of the admission-valve and at some distance therefrom is
arranged a reciprocating finger, moving in a line with the said stem and synchron-
ously with the slide-valve. By the side of these parts is placed a lever capable of
oscillating by gravity and carrying a movable pin controlled by a spring, the lever
and the pin being so disposed that, when the lever is in a certain position, which we
shall call its operative position, the pin will be lengthwise between the stem of the
admission-valve and the reciprocating finger. The pin has such length that, under
the said conditions, the finger, on advancing, will press the pin against the valve-
stem and thus open the valve, the pin being pushed backward again by its spring
when the finger recedes. Sideward of the said lever there is an oscillating or
reciprocating tappet, which, at every stroke of the slide-valve, acts on the lever to
oscillate the same, so as to throw the pin out of line with the admission-valve-stem
and the reciprocating finger. The lever is, however, balanced in such manner that,
when the engine runs at the proper speed, the lever, after having been swung out of
its operative position, will return thereinto just in time to be again acted upon by
the reciprocating finger at its next forward stroke. The admission-valve is in this
case opened at every stroke of the slide-valve. But, if the speed of the engine is
too great, the lever, on oscillating backward, will be too late for the pin to be
engaged by the reciprocating finger; the admission-valve will consequently then
remain closed and the cylinder will not receive any charge of explosive mixture.
This skipping of charges continues until the engine has reassumed its normal speed,
whereupon the admission-valve is opened again regularly.
In the annexed drawing Fig. 1 is the front elevation of a gas-engine cylinder
with our improved regulating device attached thereto, the aforesaid lever being in
operative position. Fig. 2 is a like view showing the lever in different position.
Fig. 3 is a plan corresponding to Fig. 1. Fig. 4 is a sectional plan of the lever and
other parts drawn to a larger scale. Fig. 5 is a front view of the device with
different arrangement of its means for oscillating the lever. Fig. 6 is an enlarged
front view of the lever belonging thereto.
In Figs. 1 to 4 a is the admission-valve for gas or vapor with box a', is the
stem of the said valve; c is the reciprocating finger which is fixed in a bracket k
secured to the slide-valve l; d is the oscillating lever turning on a horizontal
pivot m; e is the pin through which the finger c operates on the valve-stem, the
pin being mounted and arranged to slide in a sleeve integral with the lever d;
is a spring enclosed in the sleeve f and acting against a collar on the pin e so as to
keep the latter pressed with its collar outwardly against a shoulder disposed inside
of the sleeve; is the tappet through the medium whereof the lever d is oscillated
by the engine, the said tappet forming an arm of the lever i, turning on the same
pivot as the lever d and connected by the rod ; to the bracket ; n is a counter-
poise placed on an arm of the lever d and whereby the weight of the sleeve fis
so balanced that the lever will perform its return oscillation in the required time.
If the engine is running at the normal speed and the slide-valve is at the end of
its inward stroke, the parts will be in the position shown by Fig. 1, the pin e being
then in a line with and engaged between the finger c and the valve-stem b, and the
finger having acted through the pin on the stem. When the slide-valve thereupon
moves to the right (relatively to the drawing) the tappet acting from below
against the lever d, swings the same upward and puts the pin e out of line with the
finger c. At the next inward stroke of the slide-valve, the tappet h receding, allows
the lever to drop, and, provided the lever be properly balanced, it will closely

page_text: follow the tappet, so that the pin e is re-engaged by the finger e as soon as it has
come into a line therewith. The tappet being then at or near the end of its down-
ward oscillation, also serves to prevent the lever d from dropping below its operative
position.
If on the other hand the speed of the engine is above the normal, the lever d
will remain behind relatively to the motion of the tappet ; it will be too late to be
engaged by the finger c, the finger will consequently pass under the pin e, as shown
by Fig. 2, and no action on the valve-stem will take place.
According to Figs. 5 and 6 the means for oscillating the lever d upward consist
in the cam-surface o, formed on the underside of the lever, and the reciprocating
tappet h¹ integral with the bracket k, the cam-surface being so arranged that, when
the slide-valve / begins to move outward, the tappet ¹ will push against the said
surface and swing the lever upward, while, when the slide-valve is at the end of its
inward stroke, the lever rests on the tappet. For the rest the mechanism does not
differ from the one represented by Figs. 1 to 3.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The combination, with the admission-valve of a gas or petroleum-engine, of a
valve-gear comprising a reciprocating finger in line with the valve-stem, an
oscillating lever, a spring-controlled sliding pin carried by said lever and normally
engaging between the valve-stem and the reciprocating finger, means for tilting
said lever so as to throw the pin out of line with the reciprocating finger at the
time the latter moves away from the stem, the lever and the pin being free to
return to their normal position by gravity in time for the pin to transmit motion
from the finger to the stem at the following forward stroke of the finger when the
engine is running at the normal speed, substantially as described.
2. The combination of the slide-valve l, the admission-valve a having the stem b
parallel to the motion of the slide-valve, the finger c fixed to the slide-valve in a
line with the stem, the lever d capable of oscillating by gravity and having the
sleeve f, the pin e mounted in said sleeve and alapted to engage between the valve-
stem 6 and the finger c, the spring g controlling the pin e, and a tappet actuated by
the slide-valve and whereby the lever d and the pin è are oscillated to throw the pin
out of line with the finger c at the time the valve moves outward, substantially as
specified.
3. The combination of the slide-valve 1, the admission-valve a having the stem b
parallel to the motion of the slide-valve, the finger c fixed to the slide-valve in a
line with the stem b, the lever d turning on a horizontal pivot m and having the
sleeve f and an arm d' with the adjustable counterpoise n, the pin e mounted in the
said sleeve and adapted to engage between the valve-stem and the finger c,
the spring a controlling the pin e, the lever i having the tappet adapted to act
from the side against the lever d, and the rod j connecting the lever i with the
lide-valve, substantially as described.
Dated the Nineteenth day of February 1891.
J. H. JOHNSON & Co.,
Agents.