Improvements in Drilling Machinery.
Year: 1889

page_text: Date of Application, 27th Dec., 1889
Complete Specification Left, 24th Sept., 1890-Accepted, 25th Oct., 1890
1
PROVISIONAL SPECIFICATION.
Improvements in Drilling Machinery.
I, FREDERICK JOHN ROWAN, of 121 West Regent Street, Glasgow, in the County
of Lanark, North Britain, Engineer, do hereby declare the nature of this invention to
be as follows, that is to say :-
My said invention has for its object to improve the construction of drilling
machinery, to adapt the same for being applied in various ways, and to provide for
actuating the drilis by means of electric currents.
In carrying out my invention I adopt a type or class of machines sometimes called
"radial drills" provision being made in some cases for setting the drill spindle in
different angular positions; whilst in some cases two radial arrangements or angular
adjustment devices are combined.
In one modification forming a fixed machine there is a bed frame or table on which
the work to be operated on can be fixed; and springing up at one side or end of this
table there is a vertical pillar carrying an arm turnable about the pillar and having
on it a slide which is adjustable along the arm and which may carry the drill spindle
in a permanently vertical position or be made adjustable round the arm to give various
inclinations to the drill spindle. An electro motor is fixed upon the table or on a
bracket formed on the vertical pillar and the gearing which may be otherwise as in
any suitable existing arrangement employed in drilling machinery, is made to connect
with the motor shaft in a manner to allow of a high speed of that shaft and a suitably
reduced speed of the drill spindle.
In a second modification the machine is portable the drill spindle with usual feeding
accessories being fitted into a tubular part of a casting which is also made with a box
like part to receive speed-reducing gearing, such gearing being by preference spur
gearing, and which transmits the motion from the shaft of the electro motor the
frame of which is fixed to the casting. The machine is provided with two powerful
electro magnets by means of which it is attached to the work when drilling iron or
steel.
A third modification is like the second; but is arranged for being used inside of
a cylindrical shell such as a boiler flue or furnace shell, for drilling holes disposed in
rows round such shell or otherwise. It is made without the holding-on magnets,
and the casting carrying the spindle, gearing, and electro motor is bolted to a flange
formed in one piece with a strong stud or journal fitted into and adjustable in a socket
in a centre piece which is fitted with three adjustable legs the ends of which can be
screwed out to bear against the inside of the shell and thereby hold the apparatus in a
central position within the shell.
In a fourth modification which is for the same purpose as the third, the piece.
which is fixed within' the shell by two or more legs or feet forced outwards is made
with a circular grooved face plate and the casting carrying the drill spindle,
gearing, and electro motor is made with a counterpart circular face plate and is
fixed in any required angular position to the centre-piece face plate by bolts or
screws.
Dated this Twenty-fifth day of December 1889.
EDMUND HUNT,
Applicant's Agent.

page_text: Improvements in Drilling Machinery.
1, FREDERICK JOHN ROWAN, of 121 West Regent Street, Glasgow, in the County
of Lanark, North Britain, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say :-
My said invention has for its object to improve the construction of drilling
machinery to adapt the same for being applied in various ways, and to provide for
actuating the drills by means of electric currents.
In carrying out my invention I adopt a type or class of machines sometimes called
"radial drills," provision being made in some cases for setting the drill spindle in
different angular positions, whilst in some cases two radial arrangements or angular
adjustment devices are combined.
Four examples of the improved apparatus are shown on two accompanying sheets
of explanatory drawings, Figure, 1, on sheet, 1, being a sectional side elevation of one
modification Figures, 2, and 3, being a plan and a sectional elevation of a second
modification, Figure, 4, sheet, 2, a sectional side elevation of a third modification, part
of which is shown in back elevation in Figure, 5, and Figure, 6, being a sectional
side elevation of a fourth modification.
The modification shown in Figure, 1, is a stationary or fixed machine of the type
known as a radial drill." On a bed frame or table, A, upon or at the side of which
the work to be operated on can be attached by means of electro magnets or be other-
wise fixed, has springing up at one end a vertical pillar, B, carrying an arm, C, turn-
able about the pillar and having on it a slide or saddle, D, which is adjustable along
the arm, C, by means of a screw spindle, D 1. The saddle, D, may carry the drill
spindle, E, in a permanently vertical position or it may be made adjustable round the
arm, C, to give various inclinations to the drill spindle. An electro motor, F, is
placed under or within the table, A, and gives motion to a vertical shaft, G, in the
axis of the pillar, B, by speed-reducing gearing consisting of a spurwheel, H, on the
lower end of the shaft, G, gearing with a pinion, H 1, on a stud and in one piece with
or fixed to a spurwheel, H2, with which there gears a pinion, H 3, on the shaft of
the electro motor, F. The vertical shaft, G, by bevil wheels indicated by dotted lines
drives a horizontal shaft in the axis of the arm, C, and from this shaft motion is
communicated to the drill spindle, E, by any suitable arrangement of gearing such as
is in use in existing "radial drills."
In the modification shown in Figures, -2, and 3, the parts are carried upon or
attached to a plate, J, forming the back or connecting bar of two powerful electro
magnets or magnet poles, K. The drill spindle, E, is fitted into a tubular part, L, of
a casting which is made with a box-like part, L1, to receive the speed-reducing
gearing, H, H1, H2, H3, which transmits motion from the electro motor enclosed in
a casing, M, to the drill spindle, E. This electro motor may be of any suitable known
construction, and it is therefore unnecessary to particularise its details. The drill
spindle, E, passes through the boss of the spurwheel, H; with which it engages by
means of a groove and feather in the usual way; and the drill spindle is fed to its
work by means of a handle, E 1, acting on it by means of a screw arranged in the
upper end of the tubular part, L. The tool can be carried or suspended by a sling, N,
jointed or hooked upon studs fixed on the plate, J.
In the modification shown in Figures, 4, and 5, the drill spindle, E, and parts for
driving it are arranged as in the modification last hereinbefore described but other
parts of the tool are arranged for its being used as indicated in Figure, 5, inside of a
cylindrical shell, P, such as a boiler, a flue, or a furnace shell, for drilling holes
disposed in rows round such shell or otherwise. It is made without the holding-on
magnets (K) and the casting, L, L1, carrying the spindle, E, gearing H to H 3, and
electro motor is formed with (or it might be bolted to a flange forined on) a strong

page_text: stud or journal, Q, fitted into and adjustable in a socket in a centre piece, Q 1, in any
position in which it can be fixed by a pinching screw, 2. The centre piece, Q1, is
fitted with three adjustable legs, Q3, the outer ends, Q4, of which can be screwed out
to bear against the inside of the shell, P, and thereby hold the tool in a central position
within the shell.
In a fourth modification shown in Figure, 6, which is for the same purpose as the
third, the piece which is fixed within the shell, P, by two (or more) legs or feet, Q 4,
forced outwards, is made with a circular grooved face plate, R, and the casting, L, L1,
carrying the drill spindle, gearing and electro motor, is made with a counterpart
circular face plate, S, and is fixed in any required angular position to the centre-piece
face plate, R, by pinching screws, T, or bolts.
Having now particularly described and ascertained, the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1.-Combining together stationary radial drilling mechanism, an electro motor, and
speed-reducing gearing in the improved manner substantially as hereinbefore described,
and as shown in Figure, 1, of the accompanying drawings.
2.-Combining together an electro motor, speed-reducing gearing, a drill spindle
with its feed mechanism, a carrying frame, and electro magnets for attaching the
tool to an iron or steel structure, in the improved manner substantially as herein before
described and as shown in Figures 2, and 3, of the accompanying drawings.
3. Combining together an electro motor, speed-reducing gearing, a drill spindle
and its feed mechanism, a carrying frame, and two or more adjustable and extensible
legs for fixing the portable tool within a cylindrical or other shell on which it is to
operate in the improved manner, substantially as herein before described with reference
to Figures, 4 and 5, of the accompanying drawings.
4. Combining together an electro motor, speed-reducing gearing, a drill spindle
and its feed mechanism, a carrying frame, with an angularly adjustable face plate
and two or more adjustable and extensible legs for fixing the portable tool within a
cylindrical or other shell on which it is to operate in the improved manner, sub-
stantially as hereinbefore described with reference to Figure, 6, of the accompanying
drawings.
Dated this Twenty-third day of September 1890.
EDMUND HUNT,
Applicant's Agent.