Improvements in Multiple Drilling Machines.
Year: 1894

page_text: Date of Application, 26th June, 1894
Complete Specification Left. 25th Mar., 1895-Accepted. 26th June, 1895
Improvements in Multiple Drilling Machines.
I, GEORGE WILLIAM HAWKSLEY of the Brightside Boiler Works, in the City
of Sheffield, Manufacturer, do hereby declare the nature of my invention to
be as follows:-
This invention is to facilitate the drilling of the numerous rivet holes and other
holes in boilers, and in other mechanical work, and more particularly where such
holes are made in circles, as in the end plates of boilers.
The object being to enable the drilling tools to be adjusted to the various
positions for drilling circles of holes four at a time, with vertical and lateral
adjustment, and for other similar multiple work.
According to one arrangement four drill spindles are carried by a sliding saddle
which can be raised and lowered to various heights upon a vertical pillar, and each
spindle can be adjusted independently.
The boiler end plate for which this machine is specially arranged is held by
means of four jaws upon a circular table which can be revolved to the required
pitch of the holes to be drilled by an arrangement of dividing gear either worked
by hand or automatically.
According to another arrangement for drilling four holes at once round the flue
holes of boiler ends, or the angle ring on the end of a firebox, I carry the drill
spindles on four equidistant radial arms and provide means by which the spindles
can be drawn nearer to or further from the centre of the arms, to suit different
diameters. They are moved round a common centre, by dividing gear according
to the pitch of the rivet holes, and are supported by the radial arm of the machine
which revolves upon a pillar, and is capable of being raised and lowered by
gearing.
The pillar stands upon a table to which the work to be drilled is bolted.
"
In a machine for drilling six " gusset stay holes at once in boiler end plates.
1 arrange six drill spindles in two rows of three each upon a travelling saddle, and
30 that they can be moved towards or from each other in both directions. The
saddle is carried upon a radial arm supported by a pillar rising from a base plate,
provided with a circular revolving table upon which the work is secured, and the
radial arm is then set so that the centre lines of the drills are in line with the centre
lines of the stay holes. With this combination, lines of rivets at any angle to the
diameter of an end plate, can be drilled.
Dated the 25th dor of Liina 1901
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.

page_text: Improvements in Multiple Drilling Machines.
1, GEORGE WILLIAM HAWKSLEY of the Brightside Boiler Works, in the City
of Sheffield, Manufacturer, 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 :--
This invention is intended to facilitate the drilling of the numerous rivet holes
and other holes in steam boilers, and in other mechanical work, and particularly
where such holes are required in circles, as for example, in the end plates of
boilers.
The object of the invention is to enable the drilling tools to be adjusted to the
various positions for drilling circles of holes four at a time, with vertical and lateral
adjustment, and for other similar multiple drilling.
The invention is illustrated in the annexed sheets of drawings numbered 1, 2, 3,
in which
Fig. 1, is a side elevation, of a four drill machine.
Fig. 2, a front elevation of same.
Fig. 3, n plan of Annie.
Fige. 4, 5, 6, are similar views of a drill having four radial arins, carried by the
radial arm proper.
Figs. 7, 8, 9, are similar views of a radial drill with a revolving table and six
drills.
Figs. 14, 2, and 3 are views on an enlarged senle of the cross slide and drill
spindles of the four-drill machine shown in Figs. 1, 2, 3, giving the details more
clearly.
Figs. 4ª, 5ª, and 6, are enlarged views of the cross slide and drill head with
four radial arms and spindles, of the machine shown in Figs. 4, 5, and 6.
Figs. 7, 8, and 9 are enlarged views of the sliding head with six drill spindles,
of the machine shown in Figs. 7, 8, and 9.
The drilling machine shown in Figs. 1, 2, 3, is specially designed for drilling four
holes at one time round the circumference of the end plates of steam boilers, through
both the end plate and the angle ring together, it may be briefly described as
having a vertical standard A, rising from a base B, which also supports a revolving
table C, fitted with jaws D, which open and close simultaneously to hold the work.
Upon the standard A, is a saddle E, which can be raised and lowered as desired;
from the saddle four arms project, marked H, each arm carries a drill spindle F,
which can be adjusted in position upon the saddle E, and also upon the projecting
arms H. They are rotated by the bevel wheels 1, which receive motion from the
vertical shaft J, driven by the horizontal shafts K. The circular table C, upon
which the end plate is heid can be revolved to any required equidistant divisions
by means of the wheel M, and dividing gear N.
The standard A, can also be moved to and from the table C, by means of the
band gearing P.
The special features in this machine are the construction of the saddle E, with
the projecting arms H, carrying the adjustable drill spindles in combination with a
revolving table C, enabling the drills to be expeditiously adjusted for drilling four
holes simultaneously in arcs of circles either for single or double rivetting, and the
rotation of the table to equidistant positions, or "pitches" of the holes.
The drilling machine illustrated Figs. 4, 5, 6, is designed for drilling four
holes at one time round the flue holes of boiler ends or the angle ring on the end of
a firebox, and the novel features are the arrangement of the four drill spindles Q
adjustable radially upon a cruciform drillhead carried by a saddle which moves
horizontally upon a radial arm.

page_text: The machine is of the radial type, having a strong base supporting a vertical
pillar with a radial arm.
Upon the radial arm is a saddle R, with the usual traversing screw, and to which
the rotary driving power for the drill spindles is brought by any suitable arrange-
ment of gearing such as that shown. This saddle supports a cruciform drill-head Q,
the four arms Q³ extending in opposite directions horizontally it can be rotated to
any position, or to a series of equally spaced positions by the handwheel and
gearing S.
:
Each arm carries a drill spindle Q', which can be adjusted radially and simul-
taneously by the screws T, and hevel wheels U, geared into a correspondingly toothed
ring V.
The drill spindles Q', receive their rotary motion from the central vertical
spindle X, transmitted through the bevel wheel Y, and the intermediate short
shafts Z.
The drilling machine illustrated in Figs. 7, 8, 9, is constructed to drill six
gusset-stay holes in the end plates of boilers, simultaneously. It is of the radial
type, consisting of a base, a vertical column, a radial arm, and revolving table, and
the novel feature is the arrangement of the saddle which is constructed to carry six
drills by which two rows of three boles can be drilled simultaneously and the pitch
adjusted longitudinally and transversely to the line of rivets. It consists of a base
plate 1, with a column 2, carrying a radial arm 3, and a revolving table 4, provided
with adjustable jaws 5, operated by screws and bevel wheels geared together so as
to cause a simultaneous action.
The table is also provided with gear 6, for turning it round, to equidistant
positions for spacing the rivet holes.
The saddle 7, upon the radial arm 3, is constructed with a front plate 8, capable
of a short vertical movement for feeding the drills, which is accomplished by a rack
and pinion and hand, or self-acting feed, 9, the upward return action is caused by
the balance weight 10.
The drill spindles 11, are carried upon three arms 12, projecting from the front
plate 8, two spindles upon each arm; the arms can be moved to and from each other
laterally, and the two spindles upon each arm can be made to approach and recede
by the gearing 13, and traversing screws.
The rotary driving power for the drill spindle is brought to the saddle by any
suitable arrangement of gearing such as that shown. I prefer to give support to
the radial arm by means of a screw 14-which may bear upon the table, or upon a
block or the like placed under it to prevent the breaking of drills when they pass
through the holes.
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
clain is:
1. The drilling machine for drilling four holes round the end plates of boilers
at one time, constructed and arranged as herein before described and as illustrated
in Figs. 1, 2, 3, of the annexed drawings.
2. In a drilling machine, a vertically sliding saddle E, having four projecting
slides H, each carrying an adjustable drill spindle F, and an arrangement of bevel
gearing 1, for driving same when in any position, in combination with a revolving
table C, provided with mechanism to cause its rotation, and to space the holes at
equal distances, as hereinbefore described, with reference to the drawings, and
igs. 1, 2, 3.
3. The radial drilling machine for drilling four holes at one time round the flue
holes of boiler ends, constructed and operating as bereinbefore described, and as
illustrated in Figs. 4, 5, 6, of the annexed drawings.
4. In a radial drilling machine, a horizontally sliding saddle R, carrying a
cruciform drill hend Q, with means for its rotation, and having four arms Q³, each
arm carrying a drill spindle with radial adjustment, and driven from a central

page_text: vertical shaft by means of a bevel wheel Y, and intermediate gear Z, as hereinbefore
described and shown in Figs. 4, 5, 6.
5. The radial drilling machine for drilling six gusset stay holes at one time in
the end pintes of boilers, constructed and operating as hereinbefore described and as
illustrated in Figs. 7, 8, 9, of the drawings.
6. In a radial drilling machine as shown in Figs. 7, 8, 9, a horizontally sliding
raddle 7, upon the radial arm 3, having three projecting arms 12, which can bo
moved to and from each other horizontally, each arm carrying two drill spindles,
the outer ones being adjustable laterally, in combination with a revolving table 4,
provided with mechanism for turning it and for spacing the holes, as hereinbefore
described and shown.
Dated the 23rd day of March 1895.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.