IMPROVEMENTS IN MACHINERY OR APPARATUS APPLICABLE TO CAGES OR HOISTS USED IN MINING OR LIFTING MACHINES
Year: 1867

page_text: LETTERS PATENT to John King, of Pinxton, in the County of Derby,
Mechanician, for the Invention of "IMPROVEMENTS IN MACHINERY OR
APPARATUS APPLICABLE TO CAGES OR HOISTS USED IN MINING OR LIFTING
MACHINES."
Sealed the 15th April 1868, and dated the 18th October 1867.
PROVISIONAL SPECIFICATION left by the said John King at the Office
of the Commissioners of Patents, with his Petition, on the 18th
October 1867.
I, JOHN KING, of Pinxton, in the County of Derby, Mechanician, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY OR APPARATUS APPLICABLE TO CAGES OR HOISTS USED IN MINING OR
LIFTING MACHINES," to be as follows:-
My improvements consist in applying at or near the top of the cage or lift
two bars or rods of lengths sufficient to project beyond the sides of the cage or
lift when the guide rods or bars are on the outside thereof. At or near the ends
of these bars or rods are secured strong pulleys, saw-toothed on their periphery,
and fixed to the bars or rods excentrically. The bars or rods are also pro-
vided with a pair of levers connected at their upper ends with the lower ends
of two pairs of strong spring links which are secured intermediately of their
length to strong chains secured to the lower arm of a three armed slip hook

page_text: or link, the two upper arms forming two strong hooks which slide by the side
of each other; these hooks are pressed into the ring or loop of the hoisting
rope or chain, the upper arms of the slip hook or link at the highest point to
which the cage or lift is hoisted is pressed against a strong hoop or ring, the
centre of which is under the groove of the hoisting chain or rope pulley, so
that if the chain or rope be overwound the arms will be depressed by such
hoop or ring and the two hooks withdrawn from the hoop or ring of the chain
or rope, thereby releasing the slip hook or link and allowing the double ended
spring links to expand and force the toothed pulleys on to the side of the
guides so that they firmly hold the cage or lift safely suspended; the same
action will occur if the chain or rope break in any part of the shaft or well
hole.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John King in the Great Seal Patent Office on the 18th
April 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN KING,
of Pinxton, in the County of Derby, Mechanician, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of October, in the year of our
Lord One thousand eight hundred and sixty-seven, in the thirty-first year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said John King, Her special licence that I, the said John. King, my
executors, administrators, and assigns, or such others as I, the said John
King, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS. IN
MACHINERY OR APPARATUS APPLICABLE TO CAGES OR HOISTS USED IN MINING OR
LIFTING MACHINES," upon the condition (amongst others) that I, the said John
King, my executors or administrators, by an instrument in writing under
*my, or their, or one of their hands and seals, should particularly describe and
ascertain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date of
the said Letters Patent.

page_text: NOW KNOW YE, that I, the said John King, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the accompanying Drawings, and to
the letters and figures marked thereon, that is to say:-
My improvements consist in applying at or near the top of the cage or lift
two bars or rods of a length sufficient to project beyond the sides of the cage
or lift when the guide rods or bars are on the outside thereof. At or near
the ends of each of these bars or rods is or are secured a strong pulley or
clutches which are saw-toothed on their periphery, and they are fixed to the
bars excentrically. These bars or rods are also provided with a pair of levers;
the levers are connected at their upper ends with the lower ends of two pairs
of strong spring links, which links are secured at a part intermediate of their
length to strong chains secured to the lower arm of a three-armed slip book or
link, the two upper arms forming two strong hooks which slide by the side of
each other. These hooks are pressed into the ring or loop of the hoisting
rope or chain, the upper arms of the slip hook or link at the highest point to
which the cage or lift is hoisted are pressed against a strong hoop or ring, the
centre of which hoop or ring is under the groove of the hoisting chain or rope
pulley, so that if the chain or rope he overwound the arms will be depressed
by such hoop or ring, and the two hooks before mentioned will be withdrawn
from the hoop or ring of the chain or rope, thereby releasing the slip hook or
link and allowing the double ended spring links to expand and force the
toothed pulleys or clutches on to the side of the guides, so that they will
firmly hold the cage or lift safely suspended; the same action will take place if
the chain or rope break in any part of the shaft or well hole.
Having thus set forth the nature of my said Invention, I now proceed more
fully to describe the manner of performing the same with reference to the
companying Drawings.

page_text: axles B are securely held by strong wrought or cast-iron brackets or plates B³,
which are firmly riveted or otherwise secured to the ends of the cage; each
axle carries a strong pulley or clutch D. These clutches are saw-toothed on
their periphery, and are secured on the axles excentrically, each clutch is also
provided with a lever D¹; these levers are each connected at their upper ends
with the lower ends of two pairs of strong spring links E, which links at a part
intermediate of their length are secured to strong chains F fastened to the
lower arm of a three-armed slip hook H by means of strong links to which are
also secured the four chains G by which the cage A is suspended. The two
upper arms of the slip hook form two strong books which slide by the side of
each other. These hooks are pressed into the loop of a shackle I, securely
attached to the hoisting rope or chain K, which is passed through a strong
hoop or ring L, the centre of which is under the groove of the hoisting rope
or chain pulley M. Such ring and pulley are shewn in side view at Figure 3
and in plan at Figure 4 as applied to the hoisting apparatus at the mouth of a
pit shaft where the hoop or ring L is firmly supported and held fast by two
stout brackets N bolted or otherwise secured to the pillars or standards which
support the bearings for the rope or chain pulley.
Figures 5 and 6 are enlarged views of the upper part of the standards
shewing the hoop or ring in section in Figure 6. The upper arms of the slip
hook H in the act of hoisting or lowering the cage A occupy the positions in
which they are shewn in Figures 1, 2, and 5, but in case the rope or chain K
is overwound these arms become depressed by the hoop or ring L into the
position shewn at Figure 6, by which means the hooks before mentioned are
withdrawn from the loop of the shackle I, thereby releasing the cage from the
rope or chain K, in which case as the chains F, seen at Figures 1 and 2, will
have no upward pull upon them the spring links E will be at liberty to expand,
and such expansion acting through the levers D' will cause the saw-toothed
edges of the clutches D to be forcibly pressed upon the sides of the guide
rods C and the cage A will be safely suspended. The same will occur when
the rope or chain K breaks in any part of the shaft of the mine or well hole of
the hoist in which it may be employed.
Having now described the nature of the said Invention, and in what manner
the same may be performed, I declare that I claim,-
First, the construction, arrangement, and combination of two pairs of
excentric pulleys (or clutches), such pulleys (or clutches) being forced on to
the sides of the guide rods of the cage or lift by double-ended spring links or
levers, such links or levers being allowed to act on the pulleys (or clutches) by
the overwinding or breaking of the hoisting chain or rope cause the pulleys

page_text: (or clutches) to hold the cage or hoist or lift suspended in the shaft or well
hole in which it is employed, substantially as described.
Second, the arrangement and combination of machinery or apparatus
substantially as described,
In witness whereof, I the said John King, have hereunto set my hand
and seal, this Fifteenth day of April, in the year of our Lord One
thousand eight hundred and sixty-eight.
Witness,
GEO. JON. ROBINSON,
Patent Office,
Nottingham.
JOHN KING. (L.S.)