Improved Undercutting Mechanism for Use in Quarrying Stone, Mining Coal, and like Operations.
Year: 1896

page_text: Date of Application, 9th Mar., 1896
Complete Specification Left, 9th Dec., 1896-Accepted, 9th Jan., 1897
PROVISIONAL SPECIFICATION.
Improved Undercutting Mechanism for Use in Quarrying Stone,
Mining Coal, and like Operations.
1, JUBAL BARRETT of the Firm of Charles Barrett and Sons Limited of
Ryecroft near Bingley in the County of York. Quarry Owners and Stone
Merchants, do hereby declare the nature of this invention to be as follows, that is
to Bay :-
It has reference to an improved device or improved mechanism for undercutting
a gravel, shale, or other mineral face so that it will fall and so be brought into a
better condition for facilitating its removal. The said improved device being more
especially applicable for use in the removal of any earth, shale, loose stone ctc.,
which may overlie a bed of stone desired to be quarried, and the object of my
invention is to produce means whereby such undercutting operations may be more
expeditiously performed and that without any risk to the life of the workman who
is carrying them into effect.
To attain this object I fix an appropriately formed cutting tool to the end of an
adjustable handle, the length of which may be regulated so that the workman or
user need not approach the falling face any nearer than to be safely beyond its
reach.
To this tool is fixed a link, loop or other device enabling its attachment or
coupling to the chain or rope of a crane, winch or other power-exerting-means or
mechanism most suitable for operating same as hereinafter explained.
On the cutting tool being coupled up to its motor chain or rope the workman
holds it by its handle so that its point or cutting edge is in the right position for
performing its functions as desired, on which the crane or like motor is put into
operation and so said tool is dragged or forced through the mineral face producing
a furrow and undercutting the minerals above it so that they are made to fall by
gravity.
In order that the chain or rope of the crane or other power-exerting-mechanism,
may move in the right direction for acting on the cutting tool to the best
advantage, grooved pulleys mounted on bearings fixed by being driven into or
otherwise secured to the ground, may be employed for guiding said chain or rope,
while a runner which may have a somewhat sharpened edge is mounted on the
cutting tool to reduce friction as well as facilitate its operations by cutting through
the material that lies in its path.
Dated this 7th day of March 1806
JUBAL
BARRETT,.
Per Samuel Hey,
56 Low Street, Keighley, Agent. . }

page_text: Improved Undercutting Mechanism for Use in Quarrying Stone,
Mining Coal, and like Operations.
I, JUBAL BARRETT of the Firm of Charles Barrett and Sons Limited of
Ryecroft near Bingley in the County of York, Quarry Owners and Stone
Merchants, do hereby declare the nature of this invention and in what manuer
the same is to be performed, to be particularly described and ascertained in and
by the following statement, that is to say :-
It has reference to an improved device or improved mechanism for undercutting
a gravel, shale or other mineral face so that it will fall and so be brought into a
better condition for facilitating its removal. The said improved device being more
especially applicable for use in the removal of any earth, shale, loose stone etc.,
which may overlie a bed of stone desired to be quarried, and the object of my
invention is to produce means whereby such undercutting operations may be more
expeditiously performed and that without risk to the life of the workman who is
carrying them into effect.
In accordance with my said invention I make use of the means illustrated by the
accompanying sheet of drawings, in which :-
Fig. 1 is a view of the device as seen from above and when same is in use.
Fig. 2 is an end elevation of same as seen in the direction of the arrow .
Fig. 3 is a similar view to Fig. 1 but illustrates a modification hereinafter
explained.
Fig. 4 is a diagrain intended to show the mechanism as in use.
To attain the object of my invention I fix or secure an appropriately formed
cutting tool a to the end of an adjustable handle or bar b, the length of which may
-be regulated either by screwing additional pieces together or by having such
pieces telescoped one into another with appropriate fixing screws or devices for
holding or securing same in any of their respective and relative positions, by which
means the workman or user need not approach the falling face any nearer than to
be safely beyond its reach as shown by Fig. 4.
To this tool a is secured a link c which enables the attachment thereto of the
hook d carried by the chain or rope (e) of a crane (the gib of such an one being
shown at Fig. 4) winch or other power-exerting-means or mechanism most suitable
for operating same as hereinafter explained.
On the tool a being coupled to its motor chain or rope e, the workman holds it
by its handle 6 pressing or forcing and guiding it so that its point or cutting edge a¹
is in the right position and direction for performing the functions desired of it on
which the crane or like motor is put into operation and so said tool a is dragged or
forced through the mineral face at 9 producing a furrow and undermining or under-
cutting the minerals / above it so that hy gravity they fall and lie in a loose
and easily removable heap as desired.
In order that the chain or rope e of the crane for other power-exerting-
mechanism, may move in the right direction for actuating the cutting tool a to the
best advantage grooved guide pulleys, as the one shown at k may be employed
such pulleys being secured either by bars of iron, wood or the like being driven
into the ground between the different blocks of rock, or by being attached by
swivel mechanism to a screw jack m held in position by being tightly screwed
between the two faces of a hole or opening made in the mineral face.
Again a runners which may have a somewhat sharpened edge is mounted on the
tool a to reduce friction as well as facilitate its operations by cutting through the
material that lies in its path.

page_text: When it is thought desirable the tool a may have a supplementary arm t
secured to it or formed integrally with it as shown by Fig. 3, by which means as
said tool a is drawn or travels through the minerals the parts that it loosens or
detaches therefrom are by this arm t moved or forced out of the groove or furrow
made by the tool a so that the course for each of its succeeding cutting operations
is left clear.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. Undercutting mechanism constructed and formed to be operated by the
haulage rope or chain of a crane, winch or similar hauling mechanism substantially
as specified.
2. In undercutting mechanism arranged to be operated as described, means for
manually guiding same, to perform the functions desired of it substantially as set
forth.
3. In undercutting mechanism arranged to be operated by a haulage chain or
rope, guide pulleys and means for securing same as arranged, to guide or conduct
said haulage rope in order to bring the mechanism into effective use substantially
as set forth.
4. Mechanism for undercutting to be used in the quarrying of stone the same
being constructed and arranged to operate substantially as specified.
Dated this Oth. d.
KUNATA
JUBAL BARRETT,
Per Samuel Hey,
Agent.
JUBAL BARRETT,
Per Samuel Hey,
Agent.