IMPROVEMENTS IN DRILLING MACHINES
Year: 1867

page_text: LETTERS PATENT to Andrew Betts Brown, of the Vauxhall Ironworks,
Wandsworth Road, in the County of Surrey, for the Invention of
"IMPROVEMENTS IN DRILLING MACHINES."
PROVISIONAL SPECIFICATION left by the said Andrew Betts Brown at
the Office of the Commissioners of Patents, with his Petition, on the
6th February 1867.
I, ANDREW BETTS BROWN, of the Vauxhall Ironworks, Wandsworth Road,
in the County of Surrey, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN DRILLING MACHINES," to be as follows:-
This Invention has for its object improvements in drilling machines. Much
time is now lost and expense incurred in moving heavy castings or pieces of
machinery requiring holes to be drilled in them to stationary drilling machines
driven by steam power, and at present to avoid this loss of time and cost it is
frequently preferable to produce the required holes by the tedious application
of manual labour.
Now according to my Invention I arrange a drilling machine so as to be
driven by steam, and in such manner that it can be taken to its work and
applied thereto in any position or at any inclination necessary to drill the
required holes; for this purpose I mount a steam cylinder on the drill frame,
and by a flexible pipe I lead steam thereto. According to the arrangement [
prefer the steam cylinder is fixed parallel to the drill axis, and the frame or

page_text: casting which carries them is situate between the two. The piston rod of the
steam cylinder by means of a connecting rod gives motion to a crank on an
axis on which is an excentric for working the valve, and also a bevilled pinion
gearing with a wheel on the drill axis. The machine when at work is blocked
up in the position in which it is required, or its frame may be secured by
clamping bolts to the work, or even the machine may be slung from a crane,
according to the form and position of the work. The pressure of the drill on
the part of the work on which it is operating will serve to steady the machine
in its proper position. The same machine is also applicable for tapping holes
with screw threads, or for running out or increasing the size of holes already
formed. When convenient air or other fluid under pressure may be substituted
for steam.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Andrew Betts Brown in the Great Seal Patent Office on the
6th August 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ANDREW
BETTS BROWN, of the Vauxhall Ironworks, Wandsworth Road, in the County
of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of February, in the year of our Lord One
thousand eight hundred and sixty-seven, in the thirtieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto I, the said
Andrew Betts Brown, Her special licence that I, the said Andrew Betts
Brown, my executors, administrators, and assigns, or such others as I, the
said Andrew Betts Brown, 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 Invention for
"IMPROVEMENTS IN DRILLING MACHINES," upon the condition (amongst others)
that I, the said Andrew Betts Brown, 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.

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per-
NOW KNOW YE, that I, the said Andrew Betts Brown, do hereby declare
the nature of the said Invention, and in what manner the same is to be
formed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
This Invention has for its object improvements in drilling machines. Much
time is now lost and expense incurred in moving heavy castings or pieces
of machinery requiring holes to be drilled in then to stationary drilling
machines driven by steam power, and at present to avoid this loss of time and
cost. it is frequently preferable to produce the required holes by the tedious
application of manual labour.
Now according to my Invention I arrange a drilling machine so as to be
driven by steam, and in such manner that it can be taken to its work and
applied thereto in any position or at any inclination necessary to drill the
required holes. For this purpose I mount a steam cylinder on the drill frame,
and by a flexible pipe I lead steam thereto; according to the arrangement I
prefer the steam cylinder is fixed parallel to the drill axis, and the frame or
casting which carries them is situate between the two. The piston rod of the
steam cylinder by means of a connecting rod gives motion to a crank on an
axis, on which is an eccentric for working the value, and also a bevilled pinion
gearing with a wheel on the drill axis. The machine when at work is blocked
up in the position in which it is required, or its frame may be secured by
clamping bolts to the work; or even the machine may be slung from a crane
according to the form and position of the work. The pressure of the drill on
the part of the work on which it is operating will serve to steady the machine
in its proper position. The same machine is also applicable for tapping holes
with screw threads, or for ryming out or increasing the size of holes already
formed. When convenient air or other fluid under pressure may be substituted
for steam...
And in order that my said Invention may be most fully understood and
readily carried into effect I will proceed to describe the Drawings hereunto
annexed.
DESCRIPTION OF THE DRAWINGS.
a, a, is, the frame; bis a cylinder mounted upon it, in it a piston works, and
the cylinder is supplied with steam or fluid under pressure by a pipe c; the
piston rod by means of the connecting rod d is linked with the crank pin e
fixed in the face of the fly wheel f. On the fly shaft, which is carried in
a suitable bearing on the frame, is mounted the eccentric (, giving motion

page_text: steam or fluid to and from the cylinder 6; on the fly wheel shaft is also
mounted a bevilled pinion i gearing with a bevilled wheel k, the boss of which
is held in a bearing on the frame, through it there slides the drill axis which
is grooved, and into it a feather within the boss of the wheel k enters, so that
the axis turns with the wheel and is able to move longitudinally through its
boss. The axis is also guided by other bearings in the frame, as is shown, in
which it is able both to turn and slide; at the upper end of the axis / a screw
thread is cut, and with it two screw wheels m, m, mounted on studs carried
by the frame gear; the screw wheels m, m, have brake pulleys or drums
formed with them, which are encircled by a brake strap n, the ends of which
are connected together by a screw o, and this strap passes down in. between
the two screw wheels and passes half round a stud on the frame, which is
shown in dotted lines in Fig. 2; o¹ is a hand wheel upon the screw o, by
turning which the break strap can be tightened or slackened; at the lower
end of the drill axis is formed a socket or drill chuck, into which drills or
other tools may be fitted; a¹ is a foot formed at the lower end of the frame a,
it projects just beyond the centre line of the axis l, but is notched out
immediately beneath it so that the drill or tool may not come in contact with
the foot; this foot has numerous holes bored in it to facilitate the clamping
of the machine to its work. a2 is a hole in the frame a capable of receiving a
cylindrical bar on which it is often convenient to mount the machine; or this
hole or the openings in the frame immediately behind it may receive the chain
of a crane or traveller by which the machine may be slung, and as these
openings are somewhere near the centre of gravity of the machine it may
when thus suspended be readily inclined in any direction which the work may
require. As soon as the machine is in its place the engine is set to work and
the brake strap n tightened by means of the hand wheel o'; this at once. causes
the drill to descend, and the work is seized between the point of the drill and
the foot a¹; by turning the hand wheel o¹ one way or the other the engine
may be regulated to a proper working speed, and the hole is rapidly drilled;
afterwards the motion of the engine is reversed, and the drill is caused to run
up out of the hole. To facilitate the reversal of the engine the eccentric g is
loose on its axis and able to turn partly round from one stop to another; it
rests against one of them when the engine is running forward, and the other
when the engine is reversed. Thus to reverse the engine it is only necessary
to shut off the steam for an instant to move the fly wheel back a portion of a
revolution by hand and again to admit the steam. After a little practice the
workman will be able to reverse the engine without shutting off the steam.
In order to supply the machine with steam (or it may be other fluid under

page_text: pressure) I prefer to employ a flexible hose or pipe made of vulcanized india-
rubber and canvas capable of bearing a considerable pressure.
Having thus described the nature of my said Invention, and the manner of
performing the same, I would have it understood that I do not confine myself
to the exact details described; but what I claim is the combining on the
same frame with drilling apparatus a steam or fluid pressure engine so as to
form a machine which may be carried to its work and there clamped or held
whilst the drill is driven by steam or fluid supplied through a moveable hose
or pipe.
In witness whereof, I, the said Andrew Betts Brown, have hereunto
set my hand and seal, this Fifth day of August, in the year of our
Lord One thousand eight hundred and sixty-seven.
ANDREW BETTS BROWN. (L.S.)