IMPROVEMENTS be as. IN AND RELATING TO MEANS FOR STOPPING STEAM OR OTHER ENGINES follows
Year: 1884

page_text: We, HERRMANN OELERT, of Nippes near Cologne on the Rhine, Prussia, German
Empire and ANTONIO BOLZANI of the firm of Gebr. Bolzani of Berlin N. Prussia,
German Empire do hereby declare the nature of our invention for "IMPROVEMENTS
" to be as.
IN AND RELATING TO MEANS FOR STOPPING STEAM OR OTHER ENGINES
follows:-
--
This invention relates to means for effecting the sudden stoppage of steam or
other engines from any place outside the engine-room, thereby enabling (in case of
accident, to a workman, or for any other reason) the driving engine, and the
machinery connected therewith, to be quickly stopped.
For this purpose the excentric-rod which moves the slide valve of the steam-
engine is coupled with the slide-rod in such a manner that these parts can be easily
disconnected. The separation of the slide-rod from the excentric-rod takes place
immediately a lever is released by pulling a string or by any other suitable means.
According to the said invention the excentric-rod for actuating the slide is not
connected with the valve rod of the steam-engine by a bolt, as usual, but the
excentric rod, or the valve-rod, has a fork which embraces the bolt or pin of the
valve-rod, or the excentric-rod. With this arrangement, both rods are disconnected,
as soon as the excentric-rod is pushed sideways or upwards. The valve-rod, by
reason of its guides, not being capable of following this motion.
It is obvious that, instead of the fork and bolt, other similar means may also
be employed for separably connecting the slide-rod with the excentric rod. For
instance, one of the two rods might be provided with a slot and the other with a
pin located in this slot.
In order to disconnect the excentric rod from the valve rod in the manner
indicated, we employ a double-armed disconnecting lever which has its fulcrum
upon the frame of the engine or upon a separate bracket. One arm of this lever is
(in a vertical engine) directly connected with the said fork of the excentric rod; in
a horizontal engine, however, this arm carries beneath the end of the excentric-rod
a sunall roller having a groove corresponding to the shape of the rod. The other
arm of the said disconnecting lever rests upon one end of a bell-crank-lever which
has its fulcrum also on the frame of the engine or on a separate bracket whilst the
other arm of this bell-crank-lever is connected with a wire or string which passes
into a workshop or the like to the point from which the engine is to be stopped
in cases of necessity.

page_text: According to the size of the workshop or the number of dangerous places, the
said wire or string may have other wires or strings connected with it so that by
pulling at any of these parts, the said bell-crank-lever will be moved.
By pulling the said wire or string, a short movement will be imparted to the
bell-crank-lever, whereby the disconnecting lever loses its point of support and
turns upon its fulcrum by its own weight, this lever thereby occasioning the
immediate disconnection of the excentric and slide or valve rods. This dis-
connection is facilitated by the fact that to one arm of the disconnecting lever,
which on account of its greater length already overbalances the other, a spring or a
weight is connected. A single pull or jerk of the wire or string at the moment of
danger is sufficient to stop the engine at once by stopping the motion of the
valve-gear.
To provide against the above mentioned weighted lever becoming accidentally
disconnected through vibrations which are inseparable from a steam-engine, or
from some other cause, thus stopping the latter without its being intended, the
bell-crank-lever which supports the disconnecting lever when the engine is at
work has a small spring attached to it by which it is continually pressed against
the end of the arm of the said disconnecting lever. The same object may, however,
be obtained without using a spring, by arranging the vertical arm of the bell-
crank-lever so that it inclines towards the disconnecting lever. In this case one
arm of the bell-crank-lever, may be dispensed with, the wire or string being
attached to the single arm.
The short arm of the disconnecting lever in the vertical engine may have a
short prolongation which comes in contact with the frame, thus limiting the motion
of this lever to a certain angle; for the same purpose, and in order to diminish
the effect caused by the fall, a cushion is placed underneath the weight of the
disconnecting lever in the horizontal engine.
In case the engine has been stopped by pulling the string and is to be set to
work again, the excentric and slide rods are again connected after the cut-off valve
has been closed, a small toothed wheel and a rack on the slide rod serving to
facilitate this work.
In the horizontal engine, the pin of the slide-rod may have a prolongation and a
block is attached to the engine frame having a pin on which a hand lever is
placed. By pressing against the two aforesaid pins the slide-rod is pushed so much
forwards or backwards until the excentric rod may be easily put in place. Instead
of the fulcrummed bell-crank-lever, a movable bar, may be employed, for releasing
the weighted lever at the proper moment. The said bell-crank-lever or in its place
the bar, may also be actuated by an electro-magnet or a solenoid, in case the
disconnection of the two rods by the electric current is preferred to the simple
wire-pull.
The entire apparatus described is simple and effective. The stoppage of the
engine is effected in a few seconds because the force of the steam acts as a break
against the piston.
Dated this 2nd day of July 1884.
HASELTINE, LAKE & Co.,
For the Applicants.

page_text: We HERRMANN OELERT, of Nippes, near Cologne-on-the-Rhine and ANTONIO
BOLZANI, of the firm of Gebr; Bolzani, Berlin, N. both in Prussia Germany, do
hereby declare the nature of our invention for "IMPROVEMENTS IN AND RELATING
TO MEANS FOR STOPPING STEAM OR OTHER ENGINES" 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 for its object to provide means for effecting the sudden
stoppage of a steam or other engine from any place outside the engine-room,
thereby enabling, in case of accident to a workman, or for any other reason, the
engine and the machinery connected therewith to be quickly stopped.
For this purpose the eccentric-rod which moves the slide valve of a steam-engine
is coupled with the slide-rod in such a manner that these parts can be easily dis-
connected. This separation of the slide-rod from the eccentric-rod takes place
immediately a lever is released by pulling a string or by any other suitable means,
which lever at once disconnects the eccentric-rod from the slide-rod, the engine
being thus stopped in consequence of the valve-gear discontinuing to act.
In the accompanying drawing
Figures 1 and 2 show in elevation and plan the application of this invention to
a vertical steam-engine.
Figures 3 and 4 show in similar views its application to a horizontal engine.
According to the present invention the eccentric-rod m is not connected with
the slide-rod p of the steam-engine by a bolt as usual, but the eccentric-rod, or the
slide-rod has a fork n (Figure 3) which embraces the bolt or pin of the slide rod
or the eccentric-rod. This connection of the two rods can be quickly broken by
moving the eccentric-rod sideways as in Figure 1 or upwards as in Figure 3, the
slide-rod, by reason of its gnides not being capable of following this motion.
It is obvious that, instead of the fork and bolt, other similar means can be
employed for separably connecting the slide-rod with the eccentric-rod. For
instance, one of the two rods might be provided with a slot and the other with a
pin located in this slot.
To disconnect the eccentric-rod from the slide-rod in the manner indicated, we
employ the double-armed disconnecting lever b b which has its fulcrum at 611
upon the frame of the engine (Figure 1) or upon a separate bracket (Figure 3).
The arm b of the lever is, in the vertical engine Figure 1, directly connected with
the end of the eccentric-rod; in the horizontal engine, however, this arm carries
close underneath the end of the eccentric-rod a small roller y having a groove
corresponding to the shape of the rod m in this place. The other arm b' of the
lever rests upon the end c of the bell crank lever cc which has its fulcrum cll also
on the frame of the engine (Figure 1) or on a separate support (Figure 3), whilst
the other arm of this bell-crank lever c c is in connection with a wire or string
which passes into a workshop or other place to the point from which the engine is
to be stopped in cases of necessity.
According to the size of the workshop or the number of dangerous places, the
said wire or string & may have other wires or strings connected with it so that by
pulling at any of these wires or strings the said bell crank lever co¹ will be
moved.
By pulling the wire or string in the direction of the arrow, a short rotary
movement will be imparted to the bell crank lever ac² whereby the lever b b¹ loses
its point of support on the arm and consequently moves, by reason of its weight,
0

page_text: into the position shewn by the dotted line. The arm 6 of the lever b b¹ is, at the
same time, brought into the position indicated by the dotted line, causing the
immediate disconnection of the two rods m and p. This disconnection is facilitated
by the fact that the arm b¹, which, on account of its greater length, already over-
balances the arm b, receives a greater momentum by the action of a spring h
(Figure 1) or by a weight k (Figure 3).
A single pull or jerk of the wire or string at the moment of danger is
sufficient to stop the engine at once by stopping the motion of the valve-gear.
To provide against the lever b b₁ becoming accidentally disconnected through
vibrations which are inseparable from a steam-engine or from some other cause,
thus stopping the latter without its being intended, the bell crank lever c c¹ has a
small spring i (Figure 1) attached to it, by which it is continually pressed against
the arm b. The same object may, however, be obtained, without using a spring,
by arranging the lever c, c¹ (Figure 3) so that it inclines towards the lever arm b¹.
The string may be applied directly to the arm c thus dispensing with the arm c¹.
The arm b, as shewn in Figure 1, is provided with a short prolongation d which
comes into contact with the frame at e so that the motion of the lever b b¹ is not
excessively large; for the same purpose, and in order to diminish the shock caused
by the fall of the weight k (Figure 3), a cushion v is placed thereunder.
In case the engine has been stopped by pulling the string land is to be started
again, the two rods m and p are again connected (after the stop-valve has been
closed.) the small toothed wheel g and the rack f on the slide-rod serving to
facilitate this operation. In the horizontal engine (Figures 3 and 4) the pin of the
slide rod has a prolongation u, and upon a stud w attached to the engine frame is
hand-lever s having a pin t.
a
By pressing this hand-lever against the pin u, the slide rod may be moved
forward or backward sufficiently to enable the excentric rod to be put in place.
Instead of the fulcrummed-lever c c¹, a movable bar may be employed, for
releasing the lever 61 at the proper moment.
The lever cc or the said bar, may be actuated by an electro-magnet or a
solenoid, if the disconnection of the two rods by the electric current is preferred to
the simple wire-pull.
The entire apparatus described is simple, cheap and effective. The stoppage of
the engine is effected in a few seconds, because the force of the steam acts as a
brake against the piston if the latter should begin to move back.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
First. The separable connection of the slide-rod of a steam engine with the
excentric-rod, for the purpose of enabling, by means of a lever, the disconnection of
the said excentric and slide-rods and the consequent stoppage of the engine to be
effected from a place outside the engine-room.
Second. The combination of the excentric rod m separably connected with the
slide-rod p, the lever 6 b¹ acted upon by a weight or a spring, and the lever o c¹
upon which the arm of the lever b¹ rests, the said lever c, c¹ being replaceable by
a bar.
Dated this 13th day of December 1884.
HASELTINE, LAKE & Co.,
For the Applicants.