Improvements in Stop Mechanism for Engines and Belt Gearing.
Year: 1891

page_text: Date of Application, 8th Sept., 1891-Accepted, 16th Jan., 1892
COMPLETE SPECIFICATION.
Improvements in Stop Mechanism for Engines and Belt Gearing.
I, ERNST BOENING, of 1.North Broadway, Yonkers, in the County of West
Chester and State of New York, United States of America, Machinist, 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:-
The object of this improvement is to provide a stop mechanism whereby a steam.
engine or a driving shaft may have its motion arrested at any desired- time, either
automatically or from a distant place.
I will describe apparatus involving my improvement and then point out the novel
features in the claims.
In the accompanying drawings
Figure 1 is a side view of a steam engine and a sectional elevation of an apparatus
connected therewith and embodying my improvement.
Figure 2 is a plan or top view of the parts illustrated in Figure 1.
Figure 3 is a top view of one of said parts and a horizonal section of the shank
of the same.
Figure 4 is a side elevation of a steam engine with another combination of parts
connected therewith and embodying my improvement.
Figure 5 is a transverse section of a driving shaft, a side view of a belt pulley
thereon, and a side view of a belt shiffer and other parts operating in connection
therewith, embodying my improvement.
Figure 6 is a plan of the parts illustrated in Figure 5.
Figure 7 is a sectional elevation of a steam pipe, a throttle-valve controlling the
passage of steam through the same and certain parts for operating said valvė.
Figure 8 is a section taken at the plane of the dotted line Figure 7.
Figure 9 is a sectional side elevation of the valve and gearing shown in Figure 8..
Similar letters of reference designate corresponding parts in all the figures.
Referring first to Figures 1 and 2, A. designates a steam engine, which may be
of ordinary or any desirable form. It is shown as having a bed a, a cylinder a¹
which is to contain a piston connected to a piston rod a², a cross head a³ for guiding
the piston rod, a crank shaft a, a link a connecting the crank shaft with the piston
rod, and a fly wheel as on the said shaft.
The cylinder has a valve chest a' of any desired construction, and this receives
steam from a pipe aª under control of a throttle valve a' with which said pipe is
provided.
The throttle valve is shown as having a gear wheel a affixed to its stem.
With this gear wheel engages a rack bar a" which as here shown forms a
piston rod for a piston a" that works within a cylinder a extending transversely
to the cylinder of the engine. The lower part of the cylinder a¹³ is provided
with a drip cup a to provide for taking off water of condensation, and has
connected with it a pipe a whereby steam may be conducted to it from the
pipe a. The passage of steam through the pipe a" is controlled by a valve a¹.
I have shown the valve a" as having an arm a affixed to its stem. This arm
is longitudinally slotted and has connected with the slotted portion one arm of
lever a¹ which is fulcrumed between the ends to a pin a, which, as here
hown, is supported by a bracket fastened to one of the cylinder heads. The
other arm of the lever a18 has an electro magnet a mounted upon it. This
lectro magnet is shown as of the solenoid form, and has a tubular core within
which moves a bar a" of soft iron. A spring serves to elevate the soft iron
bar. When the magnet is energized, the bar will be drawn downwards. To the

page_text: lower end of the bar is attached a rod a" which extends through the lever a
and at the lower end is provided with an arc shaped face a". The shape of
this piece may be best understood by reference to Figure 3.
The ends of the coils of the electro magnet are connected to two line wires a"
and a. As here shown, one of the connections includes an electric battery a. 4
One of the line wires is electrically connected to the works of a clock a", and
the other to a contact piece a" which is insulated from the works of the clock,
but extends into such position over the dial that the hour hand of the clock
will contact with it. Whenever this happens, the circuit, including the electro
magnet, will be completed, the latter end will be energized, and the piece a 1
will be lowered. After this lowering of the piece a" the cross head a' on its
next reciprocation towards the cylinder a', will cause a cam plate at which is
carried by it, to contact with the piece a, and oscillate the lever a¹8. The
ensuing oscillation of the lever will cause the valve a¹ to be opened. Steam
will thereupon be admitted to the cylinder a" below the piston that works 1
therein, hence the piston will be caused to rise, and its rod all will rotate the
wheel a and thereby cut off the supply of steam to the valve chest of the steam
cylinder.
In this way the steam engine will be stopped. If the contact piece a" be made.
adjustable, the clock may be used to stop the steam engine at any hour.
25
Any kind of a circuit closer may be employed in connection with the line wires a
and a, so as to provide for closing the electric circuit, including the electro magnet,
by manual action. I have shown a push button al for this purpose. Obviously
this push button may be located in a distant part of the building.
Obviously a steam whistle a" may be placed upon the pipe a so as to sound an 2
alarm whenever the engine is to be stopped.
In the combination of parts represented by Figure 4, a¹ is the engine cylinder,
a² the piston rod, and a the cross head of the steam engine. a" is a rod
sliding in brackets fastened to the cylinder and made to constitute a rack
which will impart motion from a gear wheel a affixed to the stem of the valve 3
which controls the passage of steam through a pipe as to the valve chest of
the engine. On the cross head a" is a tappet a", and on the sliding rod all
is a transversely adjustable rod a". This rod a" may be lowered into the path
of the tappet a, and whenever this happens the said tappet will impart such
movement to the rod all as to cause the latter to rotate the wheel a and cut
off the supply of steam to the valve chest of the engine.
The rod a which is supported by a spiral spring is connected to a lever a
which is fulcrumed by a pin a to a standard mounted upon the rod a". On this
rod is also mounted an electro magnet a". An armature for this electro magnet is
affixed to the lever a". The coils of the electro magnet are connected with wire 4
lines a" and a", and the latter may be connected by a clock or by a hand piece.
Obviously whenever the electro magnet a" is energized, it will lower the rod a"
into the path of the tappet a.
In Figures 5 and 6, designates a driving shaft supported in suitable
bearings, and having affixed to it a belt pulley which transmits motion to 4
another part by means of a belt 6' passing around it. The shaft B also has an
idler or loose pulley 62 mounted upon it. A belt shifter, consisting of a longi-
tudinal movable rod and arms embracing the belt b³, serves to shift the
belt from one pulley to the other. An electro magnet a" is connected with an
electric circuit in the manner heretofore described, and the electric circuit may
be closed as already explained. It is mounted on a sliding bar a", and when
it is energized it attracts an armature carried by a lever which is fulcrumed
by a pin to a standard a carried by the rod a¹¹. The free end of the lever a
has a pin pivotally connected to it. This pin works toward and from the
shaft B through a guide with which the rod a" is provided. When the magnet &
attracts its armature, this pin a" is moved into the path of a tappet a" with
which the shaft B is provided.

page_text: The shaft 6 has a slight oscillating movement, and has affixed to it an arm ¿ª
which at one side is provided with a lug 6 that rests upon an arm on the
sliding rod a", except when the latter is moved by the tappet a. When
deprived of its support by the movement of the rod a", the arm 6 will descend,
and a pin with which its under side is provided will thereupon engage with a
groove in a spiral cam b'. On the engagement of the arm with the cam, the
rod 6 will be moved longitudinally 30 as to shift the belt to the idler pulley.
The cam is provided at the end nearest the belt pulley 6 with a continuous
circumferential groove, so that it may go on rotating without applying more
force to the arm 6' after the shifting of the latter and the rod 6º.
In Figures 7, 8 and 9 I have shown a wheel or pulley C mounted loosely
upon a shaft c, and deriving motion. through a belt o from any source of
power. The shaft c is journalled in a bracket and ordinarily has no motion.
Rigidly journalled upon said shaft is a wheel C provided with a transversely
sliding bolt which may be forced into a groove formed in the belt or
driving pulley for imparting motion to the said wheel C. Upon the shaft c
is also rigidly journalled a gear wheel c which engages with a rack c¹, said
rack in turn engaging with a gear wheel a affixed to the stem of a valve a'
whereby the passage of steam through a pipe as is controlled.
The rack is double or provided with teeth on its upper side running from the
centre to one end, and on the lower side running from the centre in the opposite
direction to the other end.
a" is an electro magnet having a bar of soft iron a combined with it. This bar
has a push piece a fastened to it, and is retracted by a spring a". The coils of the
magnet are in a circuit as already explained, and the magnet may be energized
through the closing of a clock or by means of a hand piece. When the electro magnet
is energized, this push piece will force the bolt into the groove of the driving
pulley, imparting motion to the wheel C by said driving pulley and thence
through the medium of the gear wheel crack and gear wheel a¹ to the stem of
the valve a'.
In all the mechanisms which I have just described, parts may be reset by hand
after operation.
It will be seen that I provide in a simple manner for stopping a steam engine, or
a driving shaft, at any time, either automatically or from a distant point.
In every example of the improvement which I have explained, there is, it will be
seen, a driving device or driver, and an electro magnetic stop mechanism, for
preventing the transmission of power by the same to some other device.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The combination, with a driver, of an electro mechanical stop mechanism for
preventing the transmission of power from the same, substantially as specified.
2. The combination, with a driver, of an electro mechanical stop mechanism for
preventing the transmission of power from the same, and a clock for operating said
electro mechanical mechanism, substantially as specified.
3. The combination, with a driver, of an electro mechanical stop mechanism for
preventing the transmission of power from the sa ne, and a hand piece for operating
said electro mechanical mechanism, substantially as specified.
4. The combination with a steam engine, of a pipe supplying steam thereto, a
valve controlling the supply of steam, a movable part for operating said valve, a
tappet carried by the cross head of the engine, a rod capable of being moved into
the path of the tappet, and an electro magnet for shifting said rod, substantially as
specified.
5. The combination with a steam engine, of a pipe supplying steam thereto, & rod
capable of being moved into the path of the tappet, an electro magnet for shifting

page_text: said rod, and a hand piece for causing the operation of said electro magnet, substan-
tially as specified.
6. The combination with a steam engine, of a pipe supplying steam thereto, a
valve controlling the supply of steam, a movable part for operating said valve, a
tappet carried by the cross head of the engine, a rod capable of being moved into 5
the path of the tappet, an electro magnet for shifting said rod, and a clock for
causing the operation of said electro magnet, substantially as specified.
Dated this 7th don of Sentember 1801
F. W. BARKER,
Applicant's Agent.