Improvements in Machines for Boring Rock and like Hard Substances.
Year: 1899

page_text: Date of Application, 19th Jan., 1899-Accepted, 4th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Machines for Boring Rock and like Hard
Substances.
1, ALEXANDER REID TAYLOR, of Main Street, Sykeliead Place, Bellshill, in
the County of Lanark, North Britain, Mining Contractor, 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:
My invention, which relates to machines for boring rock and alike hard sub-
stance, has for its object to obtain more rigidity and efficiency of parts whereby
the shearing strain to the boring tools and the twisting or other injurious strain
to the operating screw is obviated or entirely removed.
In the drawing which illustrates my invention in operation; the longitudinal
screw is marked A, the sleeve which surrounds it, and within which the said
screw works, is marked B. This sleeve B, as seen in the drawing, is provided
along a portion of its internal length with a female screw thread which constitutes
a nut for the said screw A to work on. Rigidly mounted on the screw A, or
its extension is a ratchet wheel C which revolves between the loose fork D. The
loose fork D has within its bifurcation a pawl E and a spring F to insure its
proper engagement with the teeth of the said ratchet wheel. The outer end of
the said fork D terminates with a bent hand lever G, by means of which the
boring operation is effected.
The inner end of the longitudinal screw A has an extension, which constitutes
a box or receptacle a for receiving the boring tool H. The boring tool H is of a
length considerably reduced (nearly to half the size) of those presently in use
and is preferably composed of steel, which renders it incapable of becoming bent
or distorted during the boring operation.
The outer end of the sleeve B is provided with a nipple or stud projection b
which engages with one of several indents formed in a semicircular iron hoop
or band I nailed to the prop or upright wooden support J, against which the
boring machine is clamped during the boring operation, and this forms a new
feature of my invention.
In the form of boring apparatus illustrated in the drawing, I have consider-
ably reduced the length of the screw A say to a foot in length, and at the sanic
time I have increased its diameter, say to an inch and three quarters, which
forms an essential feature of my invention, as with this machine I can bore
through the hardest rock, stone, or other substance with no undue strain to the
working parts.
It will be understood that in operation the pawl E engages the ratchet wheel C
in the backward oscillation of the lever G and this unscrews the longitudinal
screw from the sleeve B and brings the boring tool a corresponding length
nearer to its work

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is: -
In boring machines of the type specified, the arrangement and combination
of parts whereby compactness and great strength are obtained, substantially in
the manner and for the purposes described and shewn in the drawings.
D1 11.
100
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow,
Applicant's Patent Agents.