Im- PROVEMENTS IN MACHINERY OR APPARATUS FOR DRILLING, BORING, OR CUTTING ROCK OR OTHER HARD SUBSTANCES
Year: 1875

page_text: LETTERS PATENT to William Lloyd Wise, of Chandos Chambers,
Adelphi, in the County of Middlesex, for the Invention of "Im-
PROVEMENTS IN MACHINERY OR APPARATUS FOR DRILLING, BORING, OR CUTTING
ROCK OR OTHER HARD SUBSTANCES."-A communication from abroad by
Monsieur Claude Levet, of Montceau, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said William Lloyd Wise
at the Office of the Commissioners of Patents, with his Petition,
on the 1st January 1875.
I, WILLIAM LLOYD WISE, of Chandos Chambers, Adelphi, in the
County of Middlesex, do hereby declare the nature of the said Invention
for IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRILLING, BORING, OR
CUTTING ROCK OR OTHER HARD SUBSTANCES," (a communication to me from
abroad by Monsieur Claude Levet, of Montceau, in the Republic of
France,) to be as follows:-
This Invention has for its object improvements in machinery or
apparatus for drilling, boring, or cutting rock or other hard substances.

page_text: In rock drilling apparatus as heretofore usually constructed great
difficulty has been experienced from excessive wear and tear of the parts,
whereby the drilling or boring tool has been rotated. In some machines
this has been done by means of feathers working in grooves or by twisted
or spirally grooved bars working in washers, the friction being excessive
and constant during the whole of the stroke, causing great wear and tear
and necessitating frequent renewal of parts to ensure the rotation being
sufficient for the pawl to catch the necessary tooth in the ratchet
wheel.
Other modes of rotation which have been used are equally objection-
able.
Now this Invention is designed to obviate the evils referred to and to
reduce to a minimum the extent of movement friction and consequent
wear of the parts, whereby the operation of rotating the drilling or
boring tool is performed, and furthermore to effect in a simple manner
without shock the necessary movements of the valve which governs the
admission and emission of compressed air or actuating fluid to and from
the respective ends of the cylinder. For these purposes the partial
rotations of the drilling or boring tool are effected by the operation upon
ratchet teeth on the piston rod of a catch contained in a ring or collar
carried by an arm working about a fixed centre. The ring is jointed to
the arm, and embraces the piston rod, which by its reciprocations imparts
radial movement to the arm and partial rotation to the ring. This
motion of the ring is communicated in one direction by the catch to the
piston rod, but in the other direction the catch slips over the ratchet
teeth on the piston rod.
The second part of the Invention consists in combining a valve with
the axis of the arm above mentioned, so that as the arm moves to and
fro it shall communicate to the valve the necessary movements for
governing the admission and emission of compressed air or actuating
fluid to and from the respective ends of the cylinder.
The valve may be made circular in form, its spindle constituting the
axis of the arm, and being thereby partially rotated.
The valve is made with suitable passages, and is arranged in a case or
chamber having an inlet for compressed air or actuating fluid and
passages leading to the respective ends of the cylinder, as also an exhaust
passage.

page_text: It will be evident that this Invention may be applied to various forms
of rock drilling machines; also that the method above described of
rotating the drilling or boring tool may be used independently of the
arrangement described for operating the valve.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Lloyd Wise in the Great Seal Patent
Office on the 30th June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
LLOYD WISE, of Chandos Chambers, Adelphi, in the County of Middle-
sex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of January, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said William Lloyd Wise, Her
special licence that I, the said William Lloyd Wise, my executors,
administrators, and assigns, or such others as I, the said William
Lloyd Wise, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times.
thereafter 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 In-
vention for "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRILLING, BORING,
OR CUTTING ROCK AND OTHER HARD SUBSTANCES," (a communication to me
from abroad by Monsieur Claude Levet, of Montceau, in the Republic
of France,) upon the condition (amongst others) that I, the said William
Lloyd Wise, 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 William Lloyd Wise, do hereby
declare the nature of my said Invention, and in what manner the same

page_text: is to be performed, to be particularly described and ascertained in and
by the following statement and accompanying Sheet of Drawings:-
This Invention has for its object improvements in apparatus for
drilling rock and other substances.
In rock drilling apparatus as heretofore usually constructed great
difficulty has been experienced from excessive wear and tear of the parts,
whereby the drilling or boring tool has been rotated. In some machines
this has been done by means of feathers working in grooves or by twisted
or spirally grooved bars working in washers, the friction being excessive
and constant during the, whole of the stroke, causing great wear and
tear and necessitating frequent renewal of parts to ensure the rotation
being sufficient for the pawl to catch the necessary tooth in the ratchet
wheel.
Other modes of rotation which have been used are equally objection-
able.
Now this Invention is designed to obviate the evils referred to and to
reduce to a minimum the extent of movement friction and consequent
wear and tear of the parts, whereby the operation of rotating the drilling
or boring tool is performed, and furthermore to effect in a simple manner
without shock the necessary movements of the valve which governs the
admission and emission of compressed air or actuating fluid to and from
the respective ends of the cylinder. For these purposes the partial
rotations of the drilling or boring tool are effected by the operation upon
ratchet teeth on the piston rod of a catch contained in a ring or collar
carried by an arm working about a fixed centre. The ring is jointed to
the arm, and embraces the piston rod, which by its reciprocations imparts
radial movement to the arm and partial rotation to the ring. This
motion of the ring is communicated in-one direction by the catch to the
piston rod, but in the other direction the catch slips over the ratchet
teeth on the piston rod.
The second part of the Invention consists in combining a valve with
the axis of the arm above mentioned, so that as the arm moves to and
fro it shall communicate to the valve the necessary movements for
governing the admission and emission of compressed air or actuating
fluid to and from the respective ends of the cylinder.
The valve may be made circular in form, its spindle constituting the
axis of the arm, and being thereby partially rotated.

page_text: stroke be partially rotated to the requisite extent to open the exhaust to
the compressed air or fluid that has done duty, and admit compressed
air or actuating fluid for effecting the return stroke.
Having described the nature of the said Invention and explained the
manner of carrying the same into practical effect, as communicated to 5
me as aforesaid, I hereby declare what I consider to be novel and
original, and therefore claim as the Invention secured to me by the
herein-before in part recited Letters Patent to be,―
First. Effecting the partial rotations of the drilling, boring, or cutting
tool by means of a catch contained in a ring or collar carried by an arm 1
moving radially about an axis or centre, such catch operating in con-
junction with ratchet teeth, substantially as described.
Secondly. Combining a valve with the axis of the arm g, as above
described, for the purpose specified.
In witness whereof, I, the said William Lloyd Wise, have here- 1
unto set my hand and scal, this Twenty-fifth day of June, in
the year of our Lord One thousand eight hundred and seventy-
five.