Improvements in Apparatus for Electrically Actuating the Stopping Mechanism of Engines, Motive Power, or Machinery in Cases o Accident or Otherwise, in part applicable to other purposes.
Year: 1896

page_text: Date of Application, 10th Oct., 1896
Complete Specification Left. 10th July 1897-Accepted 21st Aug. 1897
Date of Application, 10th Oct., 1896
Complete Specification Left 10th July 1897-Accepted 21st Aug. 1897
Improvements in Apparatus for Electrically Actuating the Stopping
Mechanism of Engines, Motive Power, or Machinery in Cases o
Accident or Otherwise, in part applicable to other purposes.
GEORGE ERNEST MURRAY STONE of Spring Bank, No. 217 Upperthorpe
Sheffield, Electrical Engineer do hereby declare the nature of this invention to be
as follows:-
An improved appliance or apparatus designed for more effectually actuating the
Stopping Mechanism of Engines, Motive power, or Machinery, by means of a
weighted lever, or spring and lever and quadrant or pulley with chain preferably
a weighted Lever and quadrant and chain, made to partially rotate upon a pivoti
or axle, in combination with an Electro Magnet and armature, for use wherever
a definite mechanical pull, push, or lift is required to be controlled from any
distance in case of accident or otherwise.
This improved Electric apparatus is more especially designed to work in addition
to and in conjunction with an already existing mechanism (whereby the stop valve
of an Engine is closed by a suspended weight being released by means of a trigger
and catch arrangement) thus superseding the "manual pull" system at present
used for actuating the trigger of the mechanism.
This improved Electric apparatus consists of a framework of metal or other
suitable material upon which is fixed an Electro magnet which, when the current
is passed through its coils, actuates a suitably formed and attached armature
provided with a catch or notch which is made to engage with the end of a weighted
Lever also fixed to the framework mentioned and also adjusted upon its pivot or
fulcrum that when the armature is attracted the weighted lever slips off the catch
and falls, thereby raising, with the force of a blow, more or less powerful according
to the length of lever and size of weight, a suitably formed rod made to travel
through a hole or guide formed in the framework of the apparatus and secured at
its upper end to the quadrant by a chain or link, the quadrant being constructed
to form the shorter end of the weighted lever. This rod is provided at its lower
end with a hook, eye, or other convenient device for attaching a cord or link com-
municating with the Stopping Mechanism of the Engine, or motive power, the
apparatus being fixed in a suitable position for effecting the purpose, the
electrically connected with the distant or other stations from which it is desired
to control its action.
A Bell or Gong may also be fixed in combination so as to ring simultaneously
with the action of the apparatus.
... Instead of a weighted lever I may use a spring actuated Lever, or I may use a
combination of both weight and spring. Also I may substitute a solenoid and core
in place of the Electro magnet mentioned, and for the purposes above set forth.
Dated this Twentythird day of September 1896.

page_text: Improvements in Apparatus for Electrically Actuating the Stopping
Mechanism of Engines, Motive Power, or Machinery in Cases of
Accident or Otherwise, in part applicable to other purposes.
I, GEORGE ERNEST MURRAY STONE of Spring Bank, No. 217 Upperthorpe
Sheffield Electric 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:-
The object of the present Invention is to furnish a convenient appliance.or
apparatus for actuating the stopping mechanism of Engines, motive power, or
machinery for use wherever a definite mechanical pull, push, or lift is required
to be controlled electrically from any distanve in case of accident or otherwise,
and it is more especially designed to work in addition to and in conjunction with
an already existing mechanism whereby the stop valve of an engine is closed by
means of a suspended weight being released by a "trigger and catch" arrangement
and thus supersede the "manual pull" system previously used for actuating the
trigger and catch mechanism.
or
The apparatus hereinafter described consists of a weighted lever, or spring and
lever and quadrant pulley with a chain or link, preferably a weighted lever
and quadrant and chain, made to partially rotate upon a pivot or axle, in combina-
tion with an electro magnet and armature properly fixed upon a framework of metal
or other suitable material.
In the accompanying drawings Figure I. is a front elevation of the apparatus
and
Figure II. is a corresponding view of a modification of the apparatus.
Referring to Figure I. A is the framework which may be of metal or other
suitable material upon which is fixed an electro magnet B which, when an electric
current is passed through its coils, actuates or attracts the armature C furnished
with a catch or notch D and made to engage with the end e of the lever E which
carries the weight F which may be of any suitable shape. The lever E is so
adjusted in a nearly vertical position upon its pivot or fulcrum G that when the
armature C is attracted the weighted lever E slips off the catch D and falls, thereby
raising (with the force of a blow, more or less powerful according to the length of
the lever and size of weight) the rod R made to travel through a hole or guide
formed in the framework of the apparatus and secured at its upper end by the
chain L to the shorter or lower end of the lever E which is in the form of a
quadrant K. The special feature and advantage of this arrangement is that
however heavy the weight I may be, the pressure exerted upon the catch of the
armature (when the apparatus is fixed ready for work) is so slight as to offer
practically no impediment to the electric action. The length of the chain L is
adjusted so as to allow of a certain length of free travel or fall of the lever E
before the lift or impulse is communicated to the rod R which is provided with a
spring or rubber cushion S to act as a buffer for the protection of the chain' and
other parts from too sudden shock. The loop, hook, or eye m at the lower end of
the rod R is insulated and is provided for the purpose of attaching a cord, chain
or link for connecting it with the trigger and catch arrangement fixed to the stop
valve of the engine, or with any other part of the engine or machinery which it
may be desired to actuate. The nuts rr which are screwed upon the rod R regulate
the positions of the loop m and the spring S upon the rad R, thereby determining
the length or distance of the fall of the lever E. A bell
or gong P may also be

page_text: fixed in combination so as to ring simultaneously with the action of the apparatus
for giving an alarm.
The apparatus above described being fixed in a suitable position for effecting the
purpose for which it is designed is electrically connected by means of wires to the
distant or other stations from which it is desired to control its action e.g. more
particularly the workrooms or other parts of factories.
Referring to Figure II. In cases
where the stop valve or stopping
mechanism of the engine or machinery is of a suitable form and is conveniently
situated I may substitute a link, or lever, or link work instead of the cord a. Such
form of link work is shown in Figure II. The same letters refer to similar parts
in Figure II. as in Figure I. But in Figure II. a stop valve vis shown by
dotted lines, the spindle of which is actuated by the lever vl, which is pivoted to
the link work at 2. The rod R is pivoted to one end of the lever T which
turns upon a fulcrum t, the opposite end of the lever T being pivotally attached
to a connecting rod W, which is attached to the valve lever vl at 2. This con-
necting rod may be made in two parts wl and 2 as shown so as to provide for
the interposition of the buffing spring or cushion S, the purpose of which has
already been mentionea in the description under Figure I. The part wel is recessed
as shown at y to allow the part wel movement in the direction of its length to the
extent permitted by the compression of the spring S. An additional spring n
may be used as shown, attached to the link work for maintaining it in position
until the falling of the lever E brings the link work into action.
The whole apparatus as represented in Figures I. and II. may be fixed to a firm
wooden, slate, or other suitable base, and may be enclosed in a glass covered or
other case as indicated by the dotted lines Z Z to protect it from dust or injury.
Under these circumstances the weighted lever E after falling may be thrown back
into position behind the armature catch by means of a quick pull applied to the
rod R. A spring or rubber cushion is placed at ff and serves the two fold purpose
of preventing damage to the apparatus in the event of the lever being thrown too
violently back, and of giving a starting impulse to such lever when it is adjusted
vertically. Or, as shown in Figure II. the lever E may be put back into position
by a steady pull at the handle H which is furnished with a pulley through which
runs a cord one end of which is attached to the loop of the rod R. and the other
end to the catch wheel Q which rotates upon the elongated pivot or axle G and is
so constructed as to relinquish its hold upon the lever E the moment the latter
is in position behind the armature catch D, this operation at the same time
opening the stop valve, or readjusting the stopping mechanism ready for work
again.
In the construction of this apparatus where it is intended for use on board ship
or in situations where a weight would be unsuitable I do not limit myself to the
employment of the weight F, but I may substitute a spring or springs with guides for
accomplishing the same purpose, or I may use a combination of both weight and
springs. Also I may substitute a solenoid and core in place of the electro magnet B
shown in the drawings and for the purposes above set forth.
Having now particularly described and ascertained the nature of iny said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
1. An improved apparatus for Electrically actuating the stopping mechanism
of Engines, motive power, or machinery for use wherever a definite mechanical pull
push, or lift is required to be controlled electrically from any distance in case of
accident or otherwise, and consisting of a weighted lever E adjusted so to fall
from a nearly vertical or vertical position and provided with a quadrant k and a
link or slack chain L together with a rod R and hook or loop m in combination
with an electro magnet, armature and catch substantially as herein described
and epresented in the accompanying drawings, and for the purposes above set
forth.

page_text: 2. In the apparatus herein described a special form of link work consisting of
the lever T and connecting rod W in combination with the weighted lever T and
its quadrant k, and link or slack chains L, substantially as herein described and
represented in the accompanying drawings and for the purposes above set forth.
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