Year: 1886

page_text: We, JOHN FOTHERGILL of Dale Terrace Denby Dale Road, Foreman, and WILLIAM
BRIGGS, and ISAAC BRIGGS Junior both of South Parade Manufacturers all of
Wakefield in the County of York do hereby declare the nature of our said
invention 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 improvements in apparatus for stopping engines
which enables any person to stop the engine or engines from distant parts of the
factory or works without going to the. engine room which often occupies con-
siderable time and in the case of accidents which sometimes happen at various
machines valuable life might be lost before the distance could be covered. In the
case of breakage much property might often be saved by promptly stopping the
machinery.
We are aware that attempts have been made to accomplish these ends by
electrical and other apparatus but there is always a liability of various parts
getting out of order such for instance as the battery, now our invention meets the
want most effectively, cheaply and in a very simple manner.
In order that our invention may be clearly understood and more easily carried
into practice we have appended hereunto two sheets of drawings upon which are
shown one modification of our invention applied to a factory engine and which will
enable competent persons to apply the invention to other positions and conditions
which naturally vary considerably in various factories and works. The drawings
show some of the apparatus in outline only so as to make the principle understood
as the details will vary very much according to the circumstances of each case.
Figure, 1, is a side elevation of a tube arrangement for bringing into action a
supplimental force or forces sufficient to operate any vital part of an engine from
which it may be stopped but in this instance shown to operate upon an ordinary
equilibrium valve.
Figure, 2, is a plan of the apparatus.
Figure, 3, is an end elevation of the same apparatus.
יחד

page_text: Figure, 5, is an elevation of a mode of connecting the pipes through a vacuum
cylinder in connection with a condenser or other vacuum chamber.
We will first explain the modification shown by Figures, 1, 2, and 3 in which the
most ordinary pipes of small diameter may communicate with any part of the
works and neither vacuum nor pressure is required to be maintained therein for
the successful working thereof. We will assume that the pipes A are of sayinch
⚫bore and connected all over any works and that the end A¹ is near any machine or
part or at any required station a distance from the engine, and from which it is
desired to stop the engine. The diaphragm box B is connected to the end A¹ of
the pipe A or instead of the box B an open mouth piece or compressible ball or
small syringe tube or other appliance for creating required pressure may be
connected thereto and at the engine end of the pipe A-at A is another diaphragm
box C with the diaphragm C carrying the pin which supports a lever D in an
almost upright position. Now the action is as follows:-
Immediately the diaphragm B¹ is pressed or a puff of air sent into the pipe at
the A¹ end in the works the diaphragm C1 is moved upwards or outwards
according to the position in which it is fixed for it may be fixed in almost any
position so long as the lever is supported 'thereby-the lever then falls over in the
direction of the arrow upon its centre d until it strikes the handle E¹ of the steam
cock E which is opened thereby and immediately admits steam compressed air
vacuum or water pressure to the cylinder H forcing the piston and rod M to the
right hand end thereof; which first liberates the pin F thus disconnecting the
governors from the equilibrium valve, then the pin J is next liberated which allows
the weighted lever K to turn upon its certre K¹ lifting the arm K2 and through the
roller the lever L of the equilibrium valve is lifted and the valve shut which
stops the engine. Or when the reverse motion of the lever L of the equilibrium
valve is required to close it the pressure of the weighted lever K may be brought
to bear on the top of lever L and thus close the valve by a downward pressure.
Figure 4 shows the lever D operated through the pipe A. from the mouth piece B
or other forcing arrangement as previously explained but the piston rod M in this
(case is connected direct to an equilibrium valve which can always be arranged by
separating a steam pipe and putting in such a valve but otherwise the arrangement
previously explained may be applied or evident modifications thereof. When the
piston has travelled to the right hand end of the cylinder H the steam is free to
blow through the pipe N which is joined to a whistle which might blow until the
engine man came but this of course is quite optional
In the case of a vacuum being used as shown by Figure 5 one end of the
cylinder P is connected with the condenser or other vacuum chamber or apparatus
by the pipe which always maintains a vacuum therein. The other end p¹ of the
cylinder is also connected with the condenser or air pump by the smaller pipe R
with a very small passage cock S which only allows the vacuum to be maintained
in any number of such small pipes as T and U which run into any or all parts of
the mill or works terminating with small valves V placed in suitable positions.
In starting the engine the cock Shaving two passages a larger and smaller one the
large one is used until the air is drawn out of the pipes and then the cock is turned
to the smaller passage.
D
The action is as follows:-The cock q¹ being open the connection is made with
the cylinder P and the piston is maintained in equilibrium the S-cock being-also-
open and while the stop valve to the engine is open as it would be in starting and
the mill is working the piston will be at the p¹ end of the cylinder and a vacuum
will be established and maintained in every pipe throughout the building and
immediately any cock V is opened air is admitted into the pipe and at once
drives the piston rod W to the 22 end of the cylinder the end of the piston being
connected with any suitable gear for operating the stop or other valve. The
Sinallness of the valve S does not permit the air. admitted into the pipe to reach
the p end of the cylinder and thus the equilibrium is broken..
ن.

page_text: The vacuum may be used to maintain a lever pin weight or other motion in
position which when liberated by destroying the vacuum would operate upon a
cock and steam cylinder as in Figure, 1, or the vacuum may have a direct action
upon the cylinder and be applied to an equilibrium valve of engine as in
Figures 1, 2, and 3, or the vacuum cylinder may be connected direct to an
equilibrium valve as shown in Figure 4. In fact any of the modifications shown
may be connected to any convenient part of the engine or steam supply pipes or
valves as will be readily understood by practical men from the examples given.
It will be evident that a pressure of air may be maintained in the pipes instead
of a vacuum and the operation of the levers and other parts will be very similar in
their details.
It will also be evident that by any of the modes named a lever pin or other
action may be held ready to liberate upon any moving part of the engine or to
bring into action a rotary slide or other supplimental motion connected and driven
by the engine for the purpose of shutting off the steam at any valve or to
disconnect the governor or other part.
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 :-
1st The improvements in apparatus for stopping engines of a series of pipes
connected with the various parts of a works and operated by a puff of air or other
equivalent acting either upon an extra valve as shown by Figure 4 or as shown by
Figures, 1, 2 and 3 substantially as herein set forth.
2nd. The improvements in apparatus for stopping engines of a series of pipes
connected with the various parts of a works and operated by an internal pressure
of air and acting upon any suitable part of the engine for the purpose hereof.
3rd The improvements in apparatus for stopping engines of a series of pipes
connected with the various parts of a works and operated by a condenser or other
vacuum chamber or equivalent apparatus as and for the purpose herein set forth.
Dated this 29th day of May 1886.
GEORGE BARKER,
Agent for Applicant.