Year: 1887

page_text: Date of Application, 25th Apr., 1887
Complete Left, 1st Dec., 1887
Complete Accepted, 6th Jan.. 1888
I, ERNST KÖRTING, Engine-manufacturer, residing at Hanover in the Kingdom of
Prussia, do hereby declare the nature of this invention to be as follows:-
My invention relates to gas-motors in which, when the speed is too great, the
governor operates to keep open the exhaust-port, so that the piston then pushes the
combustion-gases from the cylinder into the exhaust-pipe and draws them back again
without sucking in combustible gas-mixture.
The first improvement consists in means for establishing a connection between the
exhaust-valve and the induction-valve for combustible gas-mixture, whereby, when
the exhaust-valve is open, the induction-valve is kept closed in view of preventing an
entrance of gas-mixture into the cylinder, whereas, when the exhaust-valve is closed,
the operation of the induction-valve is unimpeded. The second improvement consists
in the means employed, in combination with the governor, for keeping open the
exhaust-valve when the speed of the engine is above the normal.
For establishing the aforesaid connection between the exhaust-valve and the
induction-valve, a double-armed lever is inserted between the respective rods or stems
of the said valves, and so arranged relatively to the said rods or stems that it will
press the induction-valve against its seat when the exhaust-valve is completely open,
but that it will not hinder the motion of the induction-valve when the exhaust-valvo
is closed. In order to avoid undue strains the lever is preferably made resilient.
The means for keeping open the exhaust-valve whenever, and as long as the engine
runs too fast, consists in a pall connected to the governor and an edge or projection
formed upon a lever or other part of the valve-operating mechanism, which is actuated
by a tappet to open the exhaust-valve and by a spring to close the same. The pall is
so arranged in respect to the said edge that, when the engine runs at the normal or a
lower speed, the edge is free from the pall, whereas, when the normal speed is exceeded,
the pall extends over the edge and catches the same as soon as the exhaust-valve has
been fully opened, the valve being then kept open and further aspiration of explosive
mixture rendered impossible until the engine reassumes its normal speed, and the
governor causes the pall to be withdrawn from the edge.
F
CA 1007

page_text: Improvements in Gas-motors.
I, ERNST KÖRTING, Engine manufacturer, residing at Hanover in the Kingdom of
Prussia, 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 :-
-
My invention relates to gas-motors in which, when the speed is too great, the
governor operates to keep open the exhaust-port, so that the piston then pushes the
combustion-gases from the cylinder into the exhaust-pipe and draws them back again,
without sucking in combustible gas-mixture.
The first improvement consists in means for establishing a connection between the
exhaust-valvo and the induction-valve for combustible gas-mixture, whereby, when the
exhaust-valve is open, the induction-valve is kept closed in view of proventing an entrance
of gas-mixture into the cylinder, whereas, when the exhaust-valve is closed, the
operation of the induction-valve is unimpeded. The second improvement consists in
the means employed, in combination with the governor, for keeping open the exhaust-
valve when the speed of the engine is above the normal.
On the annexed sheet of drawings is represented the frame of a gas-engine having
attached to it the valve-operating mechanism involving my improvements, the valve-
boxes being shown in section. a is the portion of the frame containing the power-
cylinder, the crank-shaft; c d are tho gear-wheels for driving the shaft carrying the
tappet e q is a valve by means of which gas and air are mixed in determinate
proportion, p the valvo for the admission of gas-mixture into the cylinder, the said
valve being provided with a spring for closing the same, but for the rest operating
automatically; m is the exhaust-valve, which is opened by the tappet e and inter-
mediate parts, and closed by a spring, i, and r is an electric igniting-device. Tho said
intermediate parts shown by the drawing consist in the roller f carried by a guiding-
-arm k, the lover h to which is connected the rod 7 of the exhaust-valve m, and against
which the spring i acts from below, and the rod g connecting together tho-arm k and
the lever h.
For establishing the aforesaid connection between the exhaust-valve m and the
induction-valve p, a double-armed lever n is inserted between the respective rods or
stems and o of the said valves, so that the lover will press the valvo p against its
seat when the valve m is completely open, but that it will not impede the motion of
the valve when the valve m is closed. According to the drawing the lever, having
its fulcrum at n', is pivoted with one end to the rod I so as to bo positively oscillated
thereby, whereas with its other end, which is bifurcated, it projects under the collar of
of the rod o, there being so much play between this end of the lever and the collar o'
that, when the valve m is closed, the lever allows the rod o to move; whilo, when the
valve m is fully open, the lever bears against the collar o' and keeps the rod in its
uppermost position. In order to avoid undue strains, the connection between the
parts in question is preferably made resilient, for instance in forming the end of the
lever n operating upon the rod o, by a spring, as shown in the drawing.

page_text: The means for keeping open the exhaust-valve whenever, and as long as the engine
runs too fast, consists in a pall s having its fulcrum at w and connected by an arm z
and a rod t to the governor u, the said pall forming a hook adapted to catch over an
edge v at the end of the aforesaid lever h when the latter is in its lowest position.
The pall is so arranged relatively to the governor that, when the engine makes the
normal or a lower number of revolutions, the pall is outside of the path of the edge v,
whereas when the normal number of revolutions is exceeded, it will come into the said
path. In the first case the lever h, after having been depressed by means of the
tappet e, is free to yield to the pressuro of the spring i acting thereon from below;
the exhaust-valve is therefore opened and closed in uniform intervals, and tho
induction-valve can play freely when the valve m is closed. A regular aspiration of
full charges of combustible gas-mixture by the piston consequently then takes placo,
and the engine developes its maximum power. In the second case, (when the pall
extends into the path of the edge v) the lever h, as soon as it is brought into its
lowest position by the operation of the tappet e, is caught by the pall and maintained
in this position, the valve m being thereby kept open, while at the same time the valve p
is kept closed by the lever n, so that the piston can then only push the combustion-gases
to and fro without being capable of drawing in combustible gas-mixture by the
valve p.
Considering that the spring i presses the lover h with its' edgo v firmly against the
hook of the palls during the time the tappot e does not act upon the roller f, and that
the energy of the governor is insufficient to overcome the friction existing under these
conditions between the edgo and the pall, a disengagement of the latter from the
lever h only takes place at the time the tappet has depressed the lover.
Having now particarly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is :
1. In a gas-motor, the combination, with the exhaust-valve m having the rod 1,
means for operating the said valve, and the self-acting induction-valve p having the
rod o, of the lever n connecting together the rods and o, substantially as and for the
purpose described.
2. The combination together of the exhaust-valve m, the rotating tappet e, an
intermediate gear, comprising the lover h, for transmitting motion from the tappet e
to the valve m, spring i, governor u, and pall s capable of engaging with the lover h,
and connected to the governor, substantially as and for the purpose specified.
Dated the Twenty-ninth day of November 1887.