Year: 1887

page_text: Date of Application, 12th Apr., 1887
Complete Left, 11th Jan., 1888
Complete Accepted, 17th Feb. 1888
I WILHELM BERNHARDT of Gandenzdorf near Vienna, Austria, Engineer do
hereby declare the nature of this invention to be as follows:-
According to my invention there is provided in the pipe leading from the slide
valve box of a gas motor engine to the gas supply pipe a valve held closed by a
spring, and between the stem of this and the lever or arm that acts at the required
moment thereon, for opening the valve, I provide a moveable piece which is raised
or lowered by the governor, so that when the maximum speed of the engine is
exceeded or when the speed sinks considerably below the maximum the governor
withdraws the moveable piece from between the valve stem and the lever, so that
the latter can no longer effect the opening of the former.
On starting the engine the moveable piece is raised or depressed into its proper
position between the valve stem and lever and is held there by a catch which is
automatically released when the normal speed is for the first time exceeded.
The mechanism for transmitting the motion of the governor to the moveable
piece is so arranged that it admits of varying the action of the former upon the
latter to suit different maximum speeds at which the gas supply is to be cut off.
According to one arrangement which I employ for carrying out the above
described invention, the outer end of the slide valve has an arm passing down
from it, and having a horizontal screw passing through it in a position facing the
stem of the before mentioned shut-off valve of the gas pipe, and between the screw
and the stem is a rod of such a length that at the required point of the slide's
movement in one direction the screw of its arm will push against the rod and cause
this to push the valve open. The rod is carried loose in a socket on one end of a
horizontal lever pivotted at its other end on a pin which also carries a second,
double ended, lever whose one end is connected to the weighted sliding sleeve of a
pendulum governor while its other end bears against the lower end of a screw
screwing through a lug on the first named lever, so that the motion imparted to the
second lever by the governor is transmitted through the screw to the first one,
which in its turn either holds the rod in line with the stem of the valve and the
screw of the slide valve when the engine is running at the normal speed or lowers

page_text: it down or raises it up from between these parts when the speed rises above or
sinks materially below the normal (owing to the extinguishing of the igniting
flame.) The rod is connected to a spring in the socket of the lever which causes
it to return to its original position in the socket when the screw of the slide valve
ceases to act upon it.
It will be seen that by adjusting the screw of the first lever, its position relatively
to the second lever and consequently to the position of the governor can be
regulated.
The first lever is also provided with a sliding weight, by moving which nearer to
or farther from its fulcrum, it may be made to balance the weight of the governor
sleeve to a greater or less extent, so as to enable the speed at which the governor
effects the cut off to be varied. For holding the first lever with its socket and rod
in position for acting on the valve on starting the engine, a pendant arm pivotted to
the engine cylinder is made to bear with its hooked lower end upon the socket of
the lever, so as to hold this down in position for the slide valve-screw to act upon it,
the centre line of the arm's pivot being to such an extent to one side of the centre
line of the socket, that as soon as, by an excessive speed of the engine, the lever is
made to sink by the rising of the governor sleeve, the catch of the arm will loose its
hold and will swing back on its pivot, out of the way of the lever.
Dated this 12th day of April 1887.
ABEL & IMRAY,
Agents for the Applicant.

page_text: Improvements in Regulating Apparatus for Gas-motor Engines.
I, WILHELM BERNHARDT of Gandenzdorf near Vienna, Austria, 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:-
According to my invention there is provided in the pipe leading from the slide
valve box of a gas motor engine to the gas supply pipe a valve held closed by a
spring, and between the stem of this and the lever or arm that acts at the required
moment thereon, for opening the valve, I provide a moveable piece which is raised or
lowered by the governor, so that when the maximum speed of the engine is exceeded
or when the speed sinks considerably below the maximum the governor withdraws
the moveable piece from between the valve stem and the lever so that the latter can
no longer effect the opening of the former.
On starting the engine the moveable piece is raised or depressed into its proper
position between the valve stem and lever and is held there by a catch which is
automatically released when the normal speed is for the first time exceeded.
The mechanism for transmitting the motion of the governor to the moveable piece
is so arranged that it admits of varying the action of the former upon the latter to
suit different maximum speeds at which the gas supply is to be cut off.
On the accompanying drawings Fig. 1 shews a side view of a gas motor engine
with my before described regulating mechanism applied thereto; Fig. 2 shews a back
end view, and Fig. 3 a plan; Figs. 4 and 5 shew elevation and plan to an enlarged
scale of the transmitting device between the governor and the intermediate moveable
piece. In this motor engine it is assumed that during one revolution of the crank-
shaft the combustible charge is drawn into the cylinder and compressed therein, and
during the next revolution the charge is fired and the products of combustion expelled.
The slide C in the slide chest A is worked in accordance with this mode of action by
means of a crank pin on the toothed wheel Z driven from the crankshaft. The branch
pipe through which the gas passes into the slide chest A contains a shut off cock a
and a conical valve B that is held closed by a spring, and whose stem 6 passes through
a stuffing box in a direction parallel to the motion of the piston. The cock a is opened
when the engine is started and is at other times closed.
The slide carries at its front end a rigid arm e directed downwards, having at its
lower end an adjusting screw d by means of which the extent of the space between
the valve stem b and the part connected to the slide C which effects its inward pressure
can be accurately regulated.
g
The intermediate piece f which serves to transmit the motion of the slide arm c to
the valve stem 6 consists of a bolt capable of sliding in a socket g and which is held
therein in a certain position by means of a helical spring. The socket 9 is carried by
an arm h, capable of turning on a pivot at i, which pivot also carries a two armed
lever, whose one end is connected to the bell R of a centrifugal governor, while
the other end rests against the screw k, screwed through a lateral lug on the arm h.
By means of the screw k the bolt f can therefore be adjusted in position between the
valve stem b and the adjusting screw d for any desired position of the bell R of the
governor. If the bell R is raised in consequence of an increase of speed of the engine,
beyond the said adjusted position or if it sinks below the same in consequence, for
instance of the extinction of the igniting flame of the slide, the bolt f will be corre-
spondingly lowered or raised and consequently the valve stem 6 cannot be pressed
back and no gas is admitted into the slide chest.

page_text: In order when starting the engine to lower the bolt f to the level of the valve
stem ba catch S is pivotted to the engine frame, having its point of suspension nearer
the centre line of the engine than the socket g, so that when the catch hangs down
free, as indicated in dotted lines, it is clear of the socket, and does not interfere with
its action. When, after starting the engine, the speed of the latter for the first time
rises above the normal, the socket g will be lowered and the catch S losing its hold
upon the same, will then fall back into the dotted position.
By means of the levers and hit is rendered possible to arrange the engine to
work with lower power than that for which it was originally designed. For this
purpose it is only necessary to apply to the lever h an adjustable weight m, whereby
the weight of the governor bell R will be to a certain extent counterbalanced, so that
the latter will rise at a lower speed of the engine than originally intended and cut
off the gas supply, the balancing action and consequently the reduction of power
being the more, the farther the weight m is moved from the fulcrum of the lever.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In gas motor engines the use in combination with a spring shut off valve B in
the gas supply pipe to the slide chest, of an arm c on the slide C, which, at the
moment when the slide opens the inlet port of the cylinder, acts upon the stem 6 of
the valve B so as to open the latter substantially as herein described.
2. In combination with the arm C on the slide and the valve B referred to in the
preceding claim the use of a bolt f interposed between the arm c and the stem of the
bolt such bolt being carried with sliding spring action in a socket g which is actuated
by the governor in such manner that on the normal speed of the engine being
exceeded the socket g and bolt fare moved away from between the arm c and valve
stem b so that the gas valve fails to be opened by the arm, substantially as herein
described.
3. In regulating mechanism such as is referred to in the preceding claims so
arranging the bolt f and socket g in combination with the governor that when the
speed of the engine sinks below a certain degree owing to the accidental extinction
of the igniting flame the bolt f is also moved from between the valve stem and the
arm c so as to prevent the opening of the gas valve.
4. In regulating mechanism such as is referred to in the preceding claims, the
combination with the socket g of a one armed lever h on whose fulcrum is mounted a
two armed lever l, one end of which is connected to the governor bell R while the
other end bears against an adjusting screw k whereby the engine may be adjusted to
work with any desired normal speed substantially as herein described.
5. In regulating mechanism such as is referred to in the preceding claims, the
use in combination with the socket g of a catch S for holding the socket in position
between the arm c and the stem 6 of the valve B on starting the engine which catch
is suspended from a pivot in such manner that when the socket is moved away from
it owing to an increase of speed the catch automatically falls out of gear therewith
substantially as herein described.
6. In combination with the lever / carrying the socket g referred to in the preceding
claims, the use of a sliding weight m by means of which the active weight of the
governor can be more or less counterbalanced and thus the cutting off of the gas
supply be effected at a smaller increase of speed than that at which the cut off is
effected without such weight, substantially as herein described.
ABEL & IMRAY,
Agents for the Applicant.