IMPROVEMENTS IN ROCK BORING DRILL
Year: 1874

page_text: LETTERS PATENT to Robert Brydon and James Shepherd Davidson,
both of Whitehaven, in the County of Cumberland, for the Inven-
T
tion of
IMPROVEMENTS IN
ROCK BORING DRILL
Scaled the 5th June 1874, and dated the 14th April 1874.
PROVISIONAL SPECIFICATION left by the said Robert Brydon and
James Shepherd Davidson at the Office of the Commissioners of
Patents, with their Petition, on the 14th April 1874.
We, ROBERT BRYDON and JAMES SHEPHERD DAVIDSON, both of
Whitehaven, in the County of Cumberland, do hereby declare the
nature of our said Invention for "IMPROVEMENTS IN ROCK BORING DRILL
CARRIAGES," to be as follows:-
-
This Invention relates to the carriage intended to be used for holding.
or carrying our rock boring drill as described and illustrated in the
Letters Patent granted to us bearing date June 3rd, 1873, No. 1991,
and consists of an ordinary bogie or carriage running on wheels and
surmounted by a moveable or adjustable jib hinged to a turntable or

page_text: other device on the said bogie or carriage, by means of which it can be
turned completely round or to either side of the same, as required, for
working the said rock drill, the latter being attached to the outer end of
the jib.
By means of a screw mounted on the jib and working into and round
the segmental edge of a quadrant or bracket fixed to the said turntable
or other device the jib can be elevated or depressed radially to its hinge
without shifting the position of the bogie or carriage, or the same move-
ment may be effected by means of a screw working through a nut
which is fitted and oscillates on the moveable or adjustable jib, the
bottom end of the screw resting on the bogie or carriage, or by any
other suitable contrivance.
By means of the apparatus here described the rock drill carried by the
end of the moveable jib can be readily adjusted to the varying position
of the rock to be bored.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Brydon and James Shepherd Davidson in
the Great Seal Patent Office on the 14th October 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wc, ROBERT
BRYDON and JAMES SHEPHERD DAVIDSON, both of Whitehaven, in the a
County of Cumberland, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourteenth day of April, in the year of
our Lord One thousand eight hundred and seventy-four, in the 37th
year of Her reign, did for Herself, Her heirs and successors, give and 2
grant unto us, the said Robert Brydon and James Shepherd Davidson,
Her special license that we, the said Robert Brydon and James Shepherd
Davidson, our executors, administrators, and assigns, or such others as
we, the said Robert Brydon and James Shepherd Davidson, our exe-
cutors, administrators, or assigns, should at any time agree with, and
no others, from time to time and at all times thereafter during tho
term therein expressed, should and lawfully might make, use, exercisc,
and vend, within the United Kingdom of Great Britain and Ireland, the.

page_text: Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
ROCK BORING DRILL CARRIAGES," upon the condition (amongst others) that
we, the said Robert Brydon and James Shepherd Davidson, our executors
or administrators, by an instrument in writing under our hands and
seals, or under the hand and seal of one of us, 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 im.
mediately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Robert Brydon and James
Shepherd Davidson, do hereby declare the nature of our said Invention,
and in what manner the same is to be performed, to bo particularly
described and ascertained in and by the following statement, reference
being had to the accompanying Drawings and to the letters and figures
marked thereon, that is to say:
This Invention relates to the carriage intended to be used for holding
or carrying the rock boring drill as described and illustrated in the
Letters Patent granted to us bearing date June Third, One thousand
eight hundred and seventy-three, No. 1991, and consists of an ordinary
bogic or carriage running on wheels and surmounted by a moveable or
adjustable jib hinged to a turntable or other device on the said bogie or
carriage, by means of which it can be turned completely round, or to
either sido of the same as required for working the said rock drill, the
latter being attached to the outer end of the jib.
By means of a screw mounted on the moveable or adjustable jib and
working into and round the segmental edge of a quadrant or bracket
fixed to the said turntable or other device the jib can be clevated or
depressed radially to its hinge without shifting the position of the bogie
or carriage, or the same movement may be effected by means of a screw
working through a nut which is fitted and oscillates on the moveablo or
adjustable jib, the bottom end of the screw resting on the bogic or
carriage, or by any other suitable contrivance.
And in order that our said Invention may be fully understood we
shall now proceed more particularly to describe the same, and for that
purpose shall refer to the several Figures on the annexed Sheet. of
Drawings, the same letters of reference indicating corresponding parts in
all the Figures...

page_text: Figure 1 is a side clevation of our improved rock boring drill
"carriage," and Figure 2 a plan of the same.
A represents a bogie or carriage mounted on the axles a, a, of the
flanged or other running wheels B, B, and formed with a circular hole C
through its upper surface or table, on which table around the said holo
is a flat annular faced bed or turntable D of any desired width or
external diameter. Surmounting the bogie or carriage A is a circular
segmental arc or bracket E, the base or foot 6 of which extends between
and beyond, and is fitted on its under side near each end on opposite
portions of the bed or turntable D, round which the whole is capable of
revolving so as to assume any radial position relatively with the bogie
or carriage A that may be desired. c, c, are fillets or lugs cast on the
under side of the base or foot b, which fillets or lugs are fitted between
and bear against opposite portions of the surrounding edge of the
circular hole C for the purpose of retaining the segmental arc or
bracket E in the same normal position in the centre of the bed or turn-
table D in whatever direction it may assume radially thereon, as before.
mentioned. x is a bolt passing through the upper surface or table of
the bogie or carriage A and through the base or foot of the circular
segmental arc E for the purpose of tightening up or confining the latter
at any desired portion of its rotation on the bed or turntable D.
Through the centre of the circular segmental arc or bracket E passes a
bolt or pin d, to which is hinged a moveable or adjustable jib F formed
in the present instanco of two side checks e, e, (one on each side of the
segmental arc or bracket E) which extend beyond the bogic or
carriage A and terminate at their outer ends in a distance piece or
bushf, through which they are connected by a bolt or pin g, as shown.
By this outer end of the moveable or adjustable jib F the rock drill
herein-before referred to is attached or carried. Along the outer radial
edge of the circular segmental arc or bracket E are teeth h, h, into
which gears a worm or screw G formed on or fitted to a spindle or
shaft H, the lower end of which is stepped or takes its bearing in a cross
bar or distance piece i formed or connected with and between the lower
edges of the side checks e, e, of the jib F, whilst its upper end passes
through a bearing in a plate k connecting the upper edges of the said
side cheeks and terminates thereat in a square or otherwise for receiving
a ratchet or other handle by which it may be rotated with the worm or
screw G in either direction, and in so doing the latter travels in either

page_text: an upward or downward direction over the toothed radial edge of the
circular segmental arc or bracket E, carrying with it the moveable or
adjustable jib F, which is thereby elevated or depressed radially to its
hinge or centre pin d to any desired extent, at the same time the whole
apparatus comprised by the circular segmental arc or bracket E, with
the moveable or adjustable jib F and its appendages, may be either.
entirely or partially rotated on the bed or turntable D, as before
described, either or both operations being performed without shifting the
body of the bogie or carriage A.
By this means the rock drill herein-before referred to carried by the
outer end of the movable or adjustable jib F can be readily adjusted to
the varying position of the rock to be bored.
Having now described and particularly ascertained the nature of our
said Invention and the manner in which the same is or may be used or
carried into effect, we would observe in conclusion that what we consider
to be novel and original, and therefore claim as the Invention secured
to us by the herein-before in part recited Letters Patent is, the appli-
cation and use of a circular segmental arc or bracket capable of rotating
on a faced bed or turntable in combination with a radially moveable or
adjustable jib to a rock boring drill carriage, substantially as and for the
purpose herein-before described and illustrated by our Drawings.
In witness whereof, we, the said Robert Brydon and James
Shepherd Davidson, have to this our Specification set our hands
and seals, this Eighth day of October, One thousand cight
hundred and seventy-four.