APPARATUS FOR HOLDING ROCK DRILLS IN MINES AND TUNNELS
Year: 1872

page_text: LETTERS PATENT to John Grey Cranston, of Low Byer, Alston, in
**** IMPROVEMENTS
the County of Cumberland, for the Invention of
IN APPARATUS FOR HOLDING ROCK DRILLS IN MINES AND TUNNELS."
Sealed the 12th July 1872, and dated the 17th January 1872.
PROVISIONAL SPECIFICATION left by the said John Grey Cranston
at the Office of the Commissioners of Patents, with his Petition,
on the 17th January 1872.
I, JOHN GREY CRANSTON, of Low Byer, Alston, in the County of
Cumberland, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN APPARATUS FOR HOLDING ROCK DRILLS IN MINES AND
TUNNELS," to be as follows:-
This Invention has for its object an improved carriage or support for
rock drills in drifts, mines, or tunnels in such positions as is necessary to
drill the holes most effectually for blasting purposes, and is explained by
the aid of the accompanying Sheet of Drawings which forms part of this
Specification.

page_text: The carriage consists of a trolly a on four wheels b, b, b, b, which carrics
a moveable support c, this support being actuated horizontally across the
trolly a and the face of the drift, mine, or tunnel by means of a screw d
working in a nut or thread e in the bottom of the moveable support c.
The hollow bar or stretcher f, which fixes the carriage when it is in
position, is held in a vertical position by the before-mentioned moveable
support c, and is fixed by means of the screw y working in a thread at
its lower end and the clamp hats its upper end. To this hollow shaft f
the drill or borer is attached. The drill or borer is raised or lowered by
means of a lever i having for its fulcrum the pin k, supported by the
holes 1, 1, 1, 1, in the bar m, which bar is itself held in position by the
bolts n, n, which attaches its lower end to the moveable support c, the
upper end being held by means of a loop o to the hollow, shaft f. When
the drill or borer is fixed in position the pin p and the upper bolt n are
withdrawn, when the bar m with the lever i falls back out of the
working of the drill or borer.
Having now described my improved carriage, and how the same is to
be worked, I beg it to be understood that I do not claim the parts in
themselves as new, but what I do claim is, the combination as herein
specified and shown in the accompanying Sheet of Drawings.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Grey Cranston in the Great Seal Patent
Office on the 17th July 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GREY CRANSTON, of Low Byer, Alston, in the County of Cumberland,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of January, in the year
of our Lord One thousand eight hundred and seventy-two, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Grey Cranston, Her
special licence that I, the said John Grey Cranston, my exccutors,
administrators, and assigns, or such others as I, the said John Grey
time
Cranston, my executors, administrators, and assigns, should at any

page_text: agree with, and no others, from time to time and at all times there-
after 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 Inven-
tion for "IMPROVEMENTS IN APPARATUS FOR HOLDING ROCK DRILLS IN MINES
AND TUNNELS," upon the condition (amongst others) that I, the said
John Grey Cranston, 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.
NOW KNOW YE, that I, the said John Grey Cranston, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, and the accompanying Sheet of Drawings:-
This Invention has for its object an improved carriage or support for
rock drills in drifts, mines, or tunnels in such positions as is necessary to
drill the holes most effectually for blasting purposes, and is explained
by the accompanying Sheet of Drawings which form part of the
Specification.
The carriage consists of a trolly a on four wheels b, b, b, b, which
carries a moveable support c, this support being actuated horizontally
across the trolly a and the face of the drift, mine, or tunnel by means of
a screw d working in a nut or thread e in the bottom of the moveable
support c. The hollow bar or stretcher f, which fixes the carriage when
it is in position, is held in a vertical position by the before-mentioned
moveable support c, and is fixed by means of the screw 9 working in a
thread at its lower end and the clamp hat its upper end. To this hollow
shaft the drill or borer is attached. The drill or borer is raised or
lowered by means of a lever i having for its fulcrum the pin k,
supported by the holes 1, 1, 1, 1, in the bar m, which bar is itself
held in position by the bolts n, n, which attaches its lower end to
the moveable support c, the upper end being held by means of a loop o
to the hollow shaft f. When the drill or borer is fixed in position
the pin and the upper bolt n are withdrawn, when the bar m with
the lever i falls back out of the working of the drill or borer.

page_text: Having now described my improved carriage, and how the same is to
be worked, I beg it to be understood that I do not claim the parts in
themselves as new, but what I do claim is, the combination carriage as
herein specified and shown in the accompanying Sheet of Drawings for
the purposes mentioned.
In witness whereof, I, the said John Grey Cranston, have here-
unto set my hand and seal, this Twelfth day of July, in the
year of our Lord One thousand eight hundred and seventy-
two.