IMPROVE- MENTS IN TOOLS FOR BORING, AND IN APPARATUS FOR WORKING THE SAME.
Year: 1862

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "IMPROVE-
MENTS IN TOOLS FOR BORING, AND IN APPARATUS FOR WORKING THE SAME.".
A communication from abroad by Jean Rodolphe Leschot, of 16, Rue
St. Louis, Paris, France.
Sealed the 27th February 1863, and dated the 3rd September 1862.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 3rd September 1862.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN TOOLS FOR BORING, AND IN APPARATUS FOR WORKING THE
SAME," (communicated to me from abroad by Jean Rodolphe Leschot, of
16, Rue St. Louis, Paris, France,) to be as follows:-
This Invention consists in the construction and employment of tubular tools
armed with diamond cutters, to which rotary and advancing motions are
communicated. The tools consist of metal tubes with a ring of iron or steel
at the working end, into which diamond cutters are fitted; the tube is con-
nected to a shaft by a bayonet joint or otherwise. On rotary and advancing
motions being communicated to it it bores or cuts a circular aperture in the
rock, stone, or other material acted on, and receives within it a core or bar

page_text: of such material, which is afterwards removed. A caoutchouc pipe may be
connected to the tube for forcing in water to remove the detritus.
The apparatus for working the tool is mounted upon a carriage on wheels
or on a bed supporting standards, in which bearings are formed for receiving
the shaft to which the tool is fitted. Rotary motion is imparted to the shaft
through a toothed wheel gearing into a pinion on the driving shaft, which
has motion communicated to it from a crank pulley or otherwise. The
advancing motion is communicated through a wheel on the crank shaft.
communicating motion to another wheel on the tool shaft through the agency
of an intermediate wheel; one end of the tool shaft is threaded, so that while
it revolves the screw at the same time imparts a forward motion to it. For
convenience the carriage may run on rails, and may be secured to them by
grippers fixed to the carriage.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 3rd March 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send.greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of September, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Richard Archibald Brooman, Her special licence that I, the said Richard
Archibald Brooman, my executors, administrators, and assigns, or such
others as I, the said Richard Archibald Brooman, my executors, adminis
trators, 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 Invention for "IMPROVEMENTS IN TOOLS FOR BORING, AND IN
APPARATUS FOR WORKING THE SAME," (communicated to me from abroad by
Jean Rodolphe Leschot, of 16, Rue St. Louis, Paris, France,) upon the
condition (amongst others) that I, the said Richard Archibald Brooman,
my executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and

page_text: 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 Richard Archibald Brooman, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawings bereunto
annexed, that is to say :-
This Invention consists in the construction and employment of tubular tools
armed with diamond cutters, to which rotary and advancing motions are
communicated.. The tools consist of metal tubes with a ring of iron or steel
at the working end, into which diamond cutters are fitted; the tube is con-
nected to a shaft by a bayonet joint or otherwise. On rotary and advancing
motions being communicated to it it bores or cuts a cireular aperture in the
rock, stone, or other material acted on, and receives within it a core or bar.
of such material, which is afterwards removed. A caoutchouc pipe may, be
connected to the tube for forcing in. water to remove the detritus.
The apparatus for working the tool is mounted upon a carriage on wheels,
or on a bed supporting standards, in which bearings are formed for receiving
the shaft to which the tool is fitted. Rotary motion is imparted to the shaft
through a toothed wheel gearing into a pinion on the driving shaft,, which
has motion communicated to it from a crank pulley or otherwise.. The
advancing motion is communicated through a wheel on the crank shaft
communicating motion to another wheel on the tool shaft through the
agency of an intermediate wheel; one end of the tool shaft is threaded, so
that while it revolves the screw at the same time imparts a forward motion to
it. For convenience the carriage may run on rails, and may be secured to
them by grippers fixed to the carriage.
According to the work it is to be put to, the boring tool may be single or
multiple; that is to say, any number may be fitted on one frame, being so
arranged as to work at all angles and in all directions, parallel, convergent,.or
divergent. Motion may be communicated by hand, steam, or other power.
The Drawings show the manner in which the simultaneous rotary and
forward movements are effected, taking, by way of example, a machine with
only one boring tool.
Figure 1 is a longitudinal section, Figure 2 an elevation, and Figure 8 &
cross section, through the line 1, 2 of Figure 1, of a boring tool constructed
according to this Invention. a is a tube of steel or iron or other metal; b is

page_text: a ring or crown carrying on its face several cutters c, c, being diamonds. This
ring is changeable, that is, one ring may be removed and another supplied in
its place; it is fixed on the tube by a bayonet joint or otherwise.
Figures 4, 5, and 6 are different views of an apparatus with a tool for
boring, say, for example, a hole in a mine. The tube a is supported in
bearings & and e, and receives continuous rotary motion through the toothed
wheel gearing into the pinion f on the driving shaft, which has motion
communicated to it by the crank r, or by a pulley, or otherwise; the tube has
also an advancing motion imparted to it by means of the nut p, the wheel h
on the driving shaft communicating motion to the wheel m on the tool shaft
through the agency of the intermediate wheel l. The apparatus is fixed to
the frame V, mounted on a carriage a on wheels or rollers y; the carriage
may be secured on rails by grippers z, as shewn in Figure 6, or in any other
convenient manner. At each turn of the tube a the cutters c bore or cut a
circular aperture in the rock or other material acted on, and a core or bar of
the material is received within the tube, and is afterwards removed, the tube
advances a distance determined by the pitch of the screw thread and by the
relative motions of the wheels h, l, m. A caoutchouc pipe at is connected to the
threaded end of the tube for forcing in water to remove the detritus, without
which the tool would become choked, and channels or grooves may be formed
on the exterior and interior surfaces of the ring 6 to facilitate the passage of
the water.
Figure 7 represents an arrangement in which the tool is fixed to a socket a³
movable round the vertical upright, and capable of being raised or lowered
to enable it to be worked at all heights; by means of three bolts, the conical
heads of which slide in a circular groove or slot, the tool may also be inclined
to bore holes at any angle or in any direction. Motion may be communicated
from a crank handle or from a belt passing over the pulley c³.
Figure 8 represents an arrangement suitable for boring deep holes of large
diameter and in any direction. The motion is imparted by a crank or by a
belt passing over a pulley, which, through gearing, gives rotary movement to
the tool. The tube a has a threaded prolongation a³, fixed to the frame v,
carrying rollers. The threads communicate rotary movement through toothed
gear to the pinion d, gearing into a rack e¹ extending the whole length of the
wooden frame f¹ which supports the apparatus; the frame v thus receives an
advancing motion which it transmits to the tube and cutters. This arrange-
ment allows of the variation of the inclination of the tube.
The plans last described are intended to illustrate the means of imparting
the simultaneous rotary and advancing motions to the tube, but they may be

page_text: varied or modified according to circumstances. Although I have herein-before
more particularly referred to boring holes in rocks, yet the Invention applies
equally to boring holes in mill and other stones and hard substances
generally.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that as the "Improve-
ments in Tools for Boring, and in Apparatus for Working the same,”-
First, the construction of such tools of a metal tube with a ring or crown at
the working end armed with diamond cutters, as herein-before described and
illustrated in the accompanying Drawings.
Second, the apparatus for imparting simultaneous rotary and advancing
motions to boring tools, substantially as herein-before described and illustrated
in the accompanying Drawings.
In witness whereof, I, the said Richard Archibald Brooman, have here.
unto set my hand and seal, this Third day of March, One thousand
eight hundred and sixty-three.