An Improved Apparatus for Automatically Stopping or Starting Lifting and other Machinery.
Year: 1889

page_text: Date of Application, 11th May, 1889
Complete Specification Left, 11th Feb., 1890-Accepted, 15th Mar., 1890
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Automatically Stopping or Starting
Lifting and other Machinery.
I, JOHN TAYLOR of the Firm of John Taylor and Sons, Queens Road Nottingham,
Engineer, do hereby declare the nature of this invention to bo as follows:-
:-
This Invention relates to an improved means of automatically stopping and starting
hoisting and other power driven machinery at any desired point or period of time...
For this purpose, I fix, on one of the revolving shafts of the hoist or other
machine to be stopped, a mitre wheel also forined as a finely notched wheel on its outer
periphery. Close up to this wheel, I have a flanged disc or casting-called the striking
disc capable of turning freely on the shaft, and held up to the mitre wheel by a collar
or other suitable means.
On opposite sides of the centre of this disc, I have two radial slots, in each of which
slides a die. One-die is tapped to receive a right hand traversing screw, turning in
suitable bearings at each end of one of these radial slots; and the other die tapped to
receive a left hand traversing screw, also turning in suitable bearings at each end of
the other radial slot. Those dies are so placed on the screws, that when one of them
is at the utmost inward end of its travel in the slot towards the shaft; the other die is
at its utmost outwards end of its travel in the slot, away from the shaft. Each of
these dies carries a notched eccentric shaped pawl on that side of the dio towards the
mitre wheel on the shaft; and, these pawls are held in such a position by light springs,
that when the die is moved down the slot towards the, shaft by its traversing screw,
the teeth of the pawl engage at its smallest diameter with those on the periphery of the
mitre wheel.
At the ends of each of the traversing screws nearest the shaft, I firmly fix another
mitre wheel; both gearing into the mitre wheel on the main shaft. On the boss of
the striking disc, I fix a gear wheel or pulley, connected by suitable means to the belt
shifting or stopping and starting gear of the hoist or other machine to. be stopped.
The periphery of the striking disc is attached by suitable means, to the hand rope,
cbain or rod used for stopping and starting the hoist or other machine at any desired
intermediate point between the extremities of its usual travel.
The action of the apparatus is such, that when starting the hoist or machine by
moving the hand rope, so that the belt or gear, causes the shaft to revolve, the mitro
wheel on same gearing into the mitre wheels on the traversing screws, causes these
latter to wind down the die and pawl on one side of the striking disc-(which remains
perfectly stationary) out of gear with, and away from the notched wheel; and to wind
down the die and pawl on the opposite side of the disc-towards the revolving notched
wheel; and with.which-at the required time--the pawl engages.
When this engagement takes place, the notched wheel-in. revolving-carries with
t, the pawl and die in gear with it; and causes the hitherto stationary striking disc
to turn round, and move with it the connection to the stopping gear of the machine,
intil this latter is brought to a stand thereby. To put the hoist in action the reverse
way the striking disc is pulled round further by the band' rope or chain-the paw!
liding over the teeth of the notched wheel-until the reversing belt or gear is caused
o turn the machine in the opposite direction; when the mitre wheels on the shaft and
raversing screws, wind the pawl and die already engaged away from the notched
wheel; and wind the other die and pawl towards the notched, wheel, with which it
ngages, and stops the machine in the reverse way at the desired point of its travel.
Dated this Ninth day of May 1887

page_text: COMPLETE SPECIFICATION.
An Improved Apparatus for Automatically Stopping or Starting
Lifting and other Machinery.
I, JOHN TAYLOR of the Firm of John Taylor and Sons, Queen's Road Nottingham,
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:
This Invention relates to an improved means of automatically stopping and starting
hoisting and other power driven machinery at any desired point or period of time.
For this purpose, I fix on one of the revolving shafts of the hoist or other machine
to be stopped, a mitre wheel; also formed as a finely notched wheel on its outer
periphery. Close up to this wheel, I have a flanged disc or casting called the striking
disc capable of turning freely on the shaft, and held up to the mitre wheel by a
collar or other suitable means.
On opposite sides of the centre of this disc, I have two radial slots; in each of
which slides a die. One die is tapped to receive a right hand traversing screw,
turning in suitable bearings at each end of one of these radial slots; and the other die
tapped to receive a left hand traversing screw, also turning in suitable bearings at
each end of the other radial slot. These dies are so placed on the screws, that when
one of them is at the utmost inward end of its travel in the slot, towards the shaft;
the other die is at its utmost outwards end of its travel in the slot, away from the shaft.
Each of these dies carries a notched eccentric shaped pawl, on that side of the die
towards the mitre wheel on the shaft; and these pawls are held in such a position by
light springs, that when the die is moved down the slot-towards the shaft-by its
traversing screw, the teeth of the pawl engage at its smallest diameter with those on
the periphery of the mitre wheel.
At the ends of each of the traversing screws nearest the shaft, I firmly fix another
mitre wheel, both gearing into the mitre wheel on the main shaft. On the boss of the
striking disc, I fix a gear wheel or pulley, connected by suitable means to the belt
shifting or stopping and starting gear of the hoist or other machine to be stopped.
The periphery of the striking disc is attached by suitable means to the hand rope,
chain or rod used for stopping and starting the hoist-or other machine at any desired
intermediate point between the extremities of its usual travel.
The action of the apparatus is such; that when starting the hoist or other machine
by moving the hand-rope, so that the belt or gear, causes the shaft to revolve; the
mitre wheel on same, gearing into the mitre wheels on the traversing screws, causes
these latter to wind down the die and pawl on one side of the striking disc (which
remains perfectly stationary) out of gear with, and away from the notched wheel; and
to wind down the die and pawl on the opposite side of the disc, towards the revolving
notched wheel, and with which at the required time-the pawl engages.
When this engagement takes place, the notched wheel in revolving carries with
it, the pawl and die in gear with it; and causes the hitherto stationary striking disc
to turn round and move with it the connection of the stopping gear of the
machine, until the latter is brought to a stand thereby. To put the hoist in action
the reverse way, the striking disc is pulled round further by the hand rope or
chain the pawl sliding over the teeth of the notched wheel, until the reversing belt
or gear, causes the machine to turn in the opposite direction; when the mitre
wheels on the shaft and traversing screws wind the pawl and die already engaged
from the notched wheel; and wind the other die and pawl towards the notched wheel,
with which it engages, and stops the machine in the reverse way at the desired point
of its travel.
And in order that my invention may be more fully understood and readily carried
out and into effect, I will proceed to explain the accompanying drawings; reference
being, had to the letters and figures marked thereon.
4
Fig. 1, shews 2 half front elevations of my improved apparatus, the right hand half

page_text: being an elevation towards the notched wheel, and the left hand half towards the
opposite side of the striking disc, with wheel-M (Fig. 2) removed.
Fig. 2, is a longitudinal section in plan of same, with the dies and pawls shown at
the opposite end of the traversing screws. Similar letters and figures refer to similar
parts, throughout the several drawings.
In these views 1 fix on one of the revolving shafts A of the hoist or other machine to
be stopped, a mitre wheel H, also formed as a finely notched wheel on its outer
periphery. Close up to this wheel H, I have a flanged disc or casting B called the
striking disc, capable of turning freely on the shaft A, and held up to the mitre
wheel H by a collar or other suitable means. On opposite sides of the centre of this
disc. B, I have two radial slots M and N in each of which slides a disc D and D'
respectively. One die D is tapped to receive a right hand traversing screw C turning
in suitable bearings at each end of the radial slot M' and the other die D', tapped to
receive a left hand traversing screw (also turning in suitable bearings at each end
of the other radial slot N. These dies D and D' are so placed on the screws C and C³,
that when either of them is at the utmost end of its travel in the slot, towards the
shaft A, the other die is at its utmost outwards end of its travel in the slot, away from
the shaft A. Each of these dies D and D' carries a notched eccentric shaped pawl E
and E on that side of the die towards the mitre wheel H on the shaft A; and these
pawls E and E are held in such a position by light springs, that when either die is moved
down the slot towards the shaft A by its traversing screw, the teeth of the pawl carried
by the die so travelling, engage at its smallest diameter with those on the periphery
of the mitre wheel H. At the ends of each of the traversing screws Cand nearest
the shaft A, I firmly fix another mitre wheel G and G', both gearing into the mitre
wheel H, on the main shaft A. On the boss of the striking disc B, I fix a gear wheel
or pulley M, connected by suitable means to the belt shifting or stopping and starting
gear of the hoist or other machine to he stopped. The periphery B' of the striking
disc B is attached by suitable means to the hand rope, chain or rod for stopping and
starting the hoist or other machine at any desired intermediate point between the
extremities of its usual tread.
The action of the apparatus is as follows:- When starting the hoist or machine by
moving the hand rope so that the belt or gear causes the shaft A to revolve, the mitro
wheel H on same, gearing into the mitre wheels G and G¹ on the traversing screws C
and C, causes these latter to wind down the die D'and pawl E-as shewn in Fig. 1,-
on one side of the striking dise B (which remains stationary) out of gear with and
away from the notched wheel H; and to wind down the die D and pawl E from the
position shewn in fig. 1, on the opposite side of the disc B towards the revolving
notched wheel H, and with which at the required time the pawl E, (as shewn in
Fig. 2) engages. When this engagement takes place, the notched wheel H in
revolving, carries with it the pawl E and die D, in gear with it, and causes the
hitherto stationary striking disc B to turn round and move with it the connection to
the stopping gear of the machine, until the latter is brought to a stand thereby. To
put the hoist in action the reverse way, the striking disc B is pulled round further by
the hand rope or chain, the pawl E sliding over the teeth of the notched wheel H,
until the reversing belt or gear cause the machine to turn in the opposite direction.
When the mitre wheels G and G' on the shafts and traversing screws C and C¹ wind
the pawl E and die D already engaged-
-as shewn in Fig. 2-away from the notched
wheel H and wind the other die D and pawl E', towards the notched wheel H, with
which it engages as shown in Fig. 1, and stops the machine in the reverse way at the
desired point of its travel.
I have shewn and described my improved apparatus for stopping and starting
machinery as applied for lifting or hoisting purposes, but it is equally applicable to
all machines and engines that require to be stopped or reversed at any desired point
of their travel, or any desired period of time; and is especially applicable for use with
steam steering engines and gear, hauling and winding engines for collieries and mines,
and other analogous machinery.

page_text: Having now particularly described and ascertained the nature and action of my
said Invention, I declare that what I claim is :-
1. In the construction of lifting or other machinery the use and application of the
disc B, with its radial slots M and N, right and left hand screws and C³, dies D
and D, pawls E and E', mitre wheels G and G', and the combined mitre and notched
wheel H; all on one of the revolving shafts of the said machine, for automatically
stopping and starting the same in the manner and substantially as shewn and described
herein, and by the accompanying drawings.
2. The particular arrangement combination and construction of the apparatus and
parts as shewn in Figs. 1, and 2 of the annexed drawings; and substantially as shewn
and hereinbefore described.
Dated this Tenth day of February 1890.
HENRY WALKER. HILL,
Agent for the said John Taylor.