IMPROVEMENTS IN DETACHING HOOKS
Year: 1882

page_text: LETTERS PATENT to John King of Pinxton in the County of Derby for an
Invention of "IMPROVEMENTS IN DETACHING HOOKS."
PROVISIONAL SPECIFICATION left by the said John King at the Office of
the Commissioners of Patents on the 27th June 1882.
JOHN KING, of Pinxton in the County of Derby.
DETACHING HOOKS.'
'IMPROVEMENTS IN
I construct each hook, of the same number of parts as the hook described in tho
specification of a Patent granted to me for " Improvements in machinery and
apparatus to prevent overwinding at collieries," Number 1105, March 27th 1879.
But in addition thereto I form a vertical slot in each outer plate, the inner
plates have each a corresponding slot, but the slots in the inner plates are wider
at the bottom than at the top or are reversely inclined to each other, these
slots are between the slots which release, or hold the shackle pin, and the
upper hole for the axle pin described in my former patent. A detaching hook
so constructed, when the hauling chain is carried away by the over running
of the engine, enables the attendants to displace the axle pin, and insert it
in the upper hole, and upon the shackle being brought back or another in its
place, the shackle pin is taken out and is passed through one hole in the shackle,
and through the upper slots in the four plates, then through the other hole in the
shackle, thus enabling the engine to lift the shackle detaching hook chains and
cage, and lower the cage onto the props, when the shackle may then be restored to
its proper position for working in the usual way, by such means a considerable
time is saved and the employment of lashing chains, and a number of workmen
dispensed with.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John King in the Great Seal Patent Office on the 3rd December
1882.
".
JOHN KING, of Pinxton in the County of Derby. IMPROVEMENTS IN
DETACHING HOOKS.
"2
I construct cach hook of the same number of parts as the hook described in the
Specification of a l'atent granted to me for Improvements in machinery and
apparatus to prevent overwinding at collieries "Number 1105, March 27th 1879.
1ut in addition thereto 1 form a vertical slot in each outer plate, the inner plates
have each a corresponding slot, but the slots in the inner plates are wider at the
bottom than at the top or are reversely inclined to each other these slots are
between the slots which release or hold the snuckle pin, and the upper hole for the
axle pin described in my former patent.
A detaching hook so constructed, when the hauling chain is carried away by the
over running of the engine, enables the attendants to displace the axle pin and
insert it in the upper hole, and upon the shackle being brought back or another in
its place, the shackle pin is taken out and is passed through one hole in the shackle,
and through the upper slots in the four plates, then through the outer hole in the
shackle, thus enabling the engine to litt the shackle, detaching hook, chains and
cage, and lower the cage onto the props, when the shackle may be restored to its
proper position for working in the usual way, by such means a considerable time
is saved, and the employment of lashing chains, and a number of workmen
dispensed with.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side view of one modification of my improved detaching hooks,
shewing the position of its several parts while in use.
Figure 2, is a side view of the same hook, shewing the position of its several
parts, when released from the shackle attached to the hauling rope.
Figure 3, an edge view, when in the position shewn at Figure 1; and Figures +
to 8 inclusive are separate views of portions of the hook severally referred to
hereafter.
A second modification of detaching hook is shewn in side view at Figure 9,
shewing the position of its several parts while in use.
Figure 10, a side view of the same hook, shewing the position of its several parts,
when released from the shackle attached to the hauling rope.
Figure 11, an edge view, when in the position shewn at Figure 9, and Figure 12,
side views of two plates hereafter referred to.
The corresponding parts in each figure are indicated by the same letters where
necessary.
In order to prevent overwinding of a cage or hoist, I employ two modifications
of detaching hooks, the first shewn at Figures 1 to 8, inclusive, consists of two
plates A. one of which is shewn, at Figure 6, these plates which have their sides
parallel to each other, have a thicker plate 1 between them, through these plates,
The lower pin of a double shackle (' is passed, one such shackle is shown in side
view at Figure 8. The loop of this shackle is secured to the cage or hoist by
chains in the usual way. The upper ends of the parallel plates are slutted vertically
to receive the pin or axle of a shackle D, the loop of which is secured to one end
of the hauling rope or chain, each of the plates A have a hole through which the
upper pin of a shackle C is passed, being also passed through corresponding boles

page_text: in the inner plates E; this pin forms an axle upon which the plates E rock, these
plates are shewn separately at Figure 5 between the two holes for the shackle
pins in each of the plates A is a vertical slot in which a locking pin G (hereafter
referred to) slides. The plates E, at their lower end have each a shoulder projecting
at one side, and are hooked at their upper ends, which when in use, overlap the
pin or axle of the shackle D when in the vertical slots of the parallel plates, the
uner plates are kept in the overlapping position, by a steel or iron pin G, shewn
by dotted lines at Figures 1 and 2, which is passed through angular or curved
slots in the plates E and through the lower vertical slots in the plates A and
also through a hole in each of two short plates F, one of which is shewn in side
view at Figure 7, there is one of these plates on each side of the parallel plates A,
and slides between them, and the inside of the lower shackle C.
The angular or curved slots in the plates E at their upper ends are formed
straight and parallel to the sides, such straight portions, when the locking pin
is in them, prevent the plates from opening out until the plates carrying the
locking pin are forced downwards by striking against the underside of a ring or
plate 1, which is secured to and carried by the overhead framing under the groove
of the pulley of the hauling rope or chain.
To keep the short plates in the locked position shewn at Figure 1, I employ two
copper or other metal pins H, driven tight into holes near the edges of the plates A,
these pins project outside each of the plates A, the thickness or nearly so of the
short plates F.
By means of a detaching hook constructed as above described the whole of the
weight, when at work is carried by the two strong plates E, and the axle pins of
the shackles C and D.
In the second modification of detaching hook, shewn at Figures 9 to 12 inclusive,
I dispense with the short plates F and locking pin G described in the first
modification, and employ plates A lying parallel to each other, and held the
required distance apart by the interposition of a thicker plate B at the bottom,
or the plates A and B may be forged solid at that part and drilled to receive
the axle of a shackle C, which is secured to the cage or hoist by chains in the
usual way.
The upper ends of the plates A are slotted vertically to receive the pin or axle
of a shackle D, the loop of which is secured to one end of the hauling rope or
chain, below the open ended vertical slots in the plates A, is a second vertical
slot J, and below the slot J, the plates are drilled out, to receive an axle pin F,
between the plates A rocking upon the axle F', are two plates E shewn separately
at Figure 12, these plates besides being drilled out to receive the axle Fare
reversely slotted at K, the upper end of these slots coincide with the upper end of
the vertical slots J, in the plates A, when in work as shewn at Figure 9, but when
the hook has released the hauling shackle D, and is holding the cage or hoist
suspended the hook being in the position shewn at Figure 10, the lower end of
the slots K coincido with the lower end of the vertical slots J. The plates E are
hooked at their upper end, and when at work overlap the axle of the shackle D,
the lower end forms a shoulder on one edge, and a projecting arm at the opposite
edge, the shoulders rest upon a ring or plate I, when the hook has released the
shackle D through the hauling rope or chain being carried away by the over
running of the engine, the shoulders are placed in the position shewn at Figuro 10,
by the projecting arms of the plates F striking the lower edge of the ring or plate I,
when overhauled. The plates are kept in the locked position shewn at Figure 1
by a copper or other metal pin H driven tight into corresponding holes in the four
plates, the pin being cut across as the plates open out.
The plates A and E of the first modification of detaching hook being provided
respectively with the slots J and K. It follows that both detaching hooks act as
follows: The shackle end of the hauling rope or chain is passed through the ring
or plate I, the orifice of which just allows of the passage of the upper part of the
detaching hooks, but upon the projecting sides of the plates F shewn in the

page_text: first modification or the projecting arms of the plates F shewn in the
second modification striking the lower edge of the ring or plate I. the copper
or other metal pins or pin H, are shorn off, the plates E close in at their lower
ends on one side, and project at the opposite side, the hooked ends passing
clear of the upper shackle, release the same, and at the same time, the projecting
lower ends of the plates E pass over and rest upon the upper edge of the ring or
plate 1, and thus securely suspend the cage or hoist, when the hauling rope or
chain is overwound. Detaching hooks so constructed when the hauling chain is
carried away by the over running of the engine cuables the attendants to displace
the axle pin of the shackle and upon the shackle being brought back or another
in its place, the shackle pin is passed through one hole in the shackle, and through
the slots and K of the four plates, then through the other hole in the shackle,
thus enabling the engine to lift the shackle, detaching hook, chains, and cage or
hoist, and lower it onto the props, when the shackle may be restored to its proper
position for working in the usual way. By such means a considerable time is
saved, and the employment of lashing chains and a number of workmen dispensed
with.
Having now described the nature of my said Invention and in what manner the
same may be performed I declare that I claim :-
The construction and employment of detaching hooks substantially as hercin-
before described and illustrated in the Drawings annexed.
In witness whereof I the said John King have hereunto set my hand
and seal this sixteenth day of December in the year of our Lord, One
thousand eight hundred and eighty two.
Witness,
H. W. Gorgir, C.E.
Nottingham.
JOHN KING. (L.S.)