IMPROVEMENTS IN MACHINERY AND APPARATUS TO BE EMPLOYED IN SUSPENDING CAGES AND HOISTS
Year: 1879

page_text: LETTERS PATENT to John King, of Pinxton, in the County of Derby, for the
Invention of "IMPROVEMENTS IN MACHINERY AND APPARATUS TO BE EMPLOYED
IN SUSPENDING CAGES AND HOISTS."
Sealed the 19th August 1879, and dated the 16th June 1879.
PROVISIONAL SPECIFICATION left by the said John King at the Office of
the Commissioners of Patents on the 16th June 1879.
JOHN KING, of Pinxton, in the County of Derby. "IMPROVEMENTS IN MACHINERY
AND APPARATUS TO BE EMPLOYED IN SUSPENDING CAGES AND HOISTS."
Upon each side of the cage or hoist I secure a bar of wood, iron, or other
material, the upper end of which is wedged or other shaped, which pass between
clips or shoes secured to guides, and near the upper end of each guide is a cross
bar firmly secured thereto, each end of which is provided with an axle carrying
a toothed excentric, each provided with a spring or weight, one upon each side of
each guide. Suppose the engine over runs itself and severs the hoisting rope or
chain, immediately upon such severance being effected, each pair of toothed
excentrics close upon the bar of wood, iron, or other material secured to the cage,
and thereby suspends the cage or hoist, thus effectually preventing the descent of
the same and thereby avoiding the numerous accidents heretofore experienced.
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 September
1879.
JOHN KING, of Pinxton, in the County of Derby. "IMPROVEMENTS IN MACHINERY
AND APPARATUS TO BE EMPLOYED IN SUSPENDING CAGES AND HOISTS."
Upon each side of the cage or hoist I secure a bar of wood, iron, or other
material, the upper end of which is wedged or other shaped, which pass between
clips or shoes secured to guides, and near the upper end of each guide is a cross bar
[Price 4d.]

page_text: firmly secured thereto, each end of which is provided with an axle carrying a
toothed oxcentric, each provided with a spring or weight, one upon each side of
each guide. Suppose the engine overruns itself and severs the hoisting rope or
chain, immediately upon such severance being effected each pair of toothed excen-
trics close upon the bar of wood, iron, or other material secured to the cage and 5
thereby suspends the cage or hoist, thus effectually preventing the descent of the
same and thereby avoiding the numerous accidents heretofore experienced.
firmly secured thereto, each end of which is provided with an axle carrying a
toothed excentric, each provided with a spring or weight, one upon each side of
each guide. Suppose the engine overruns itself and severs the hoisting rope or
chain, immediately upon such severance being effected each pair of toothed excen-
trics close upon the bar of wood, iron, or other material secured to the cage and
thereby suspends the cage or hoist, thus effectually preventing the descent of the
same and thereby avoiding the numerous accidents heretofore experienced.
DESCRIPTION OF THE DRAWINGS.
Figure 1 represents a side view of the overhead framing at the mouth of a pit
with a cage suspended by my improved apparatus.
Figure 2, a front view of the same looking towards the hauling engine.
Figures 3 and 4 are respectively an edge view and side view of a toothed
excentric hereinafter referred to.
The corresponding parts in each Figure are indicated by the same letters where
necessary.
To suspend a cage or hoist when the hoisting rope or chain is severed I employ
machinery and apparatus which consists of the following parts :-
Upon each side of the cage A I secure a bar of wood, iron, or other material B,
the upper end of which is wedge shaped; these bars pass between clips or shoes C
secured to the guides D, and near the upper end of each guide is a cross bar E
firmly secured thereto; each end of the cross bar is provided with an axle carrying
a toothed excentric F provided with a spring G, one end of which is secured in the
cross-bar, and the other end after coiling round the axle presses upon a stud H;
these springs ensure the teeth of the excentrics being pressed on to the bars B which
are firmly gripped by them as the cage descends by its own weight upon the
severance of the hoisting rope or chain when the engine overruns itself or other-
wise, the cage being safely suspended by the two pair of excentrics, until it is
slightly raised to enable the attendants to open out the excentrics by means of the
hand levers I while the cage is lowered after the rope or chain has been repaired;
there is a stud J secured in the cross bar under each excentric to prevent them
falling too low when the cage is lowered.
Having now described the nature of my said Invention and in what manner the
sane may be performed, I declare that I claim,-
The construction and employment of burs secured to cages or hoists operating
in conjunction with toothed excentrics to prevent the descent and safely suspend
the cage or hoist upon severance of the hoisting rope or chain.
In witness whereof, I, the said John King, have hereunto set my hand and
seal, this Ninth day of September, in the year of our Lord One thousand
eight hundred and soventy-nine.
Witness,
H. W. GOUGH, C.E.,
Nottingham.
JOHN KING. (L.S.)