Improvements in Drilling Machines.
Year: 1894

page_text: Date of Application, 19th Oct., 1894
Complete Specification Left, 19th July, 1895-Accepted, 5th Oct.. 1895
PROVISIONAL SPECIFICATION.
Improvements in Drilling Machines.
I, WILLIAM WILSON HULSE, of the Ordsal Works, Regent Bridge, Salford,
in the County of Lancaster, Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention has reference to a construction of drilling machines suitable for
drilling cylindrical objects such as boiler shells or drums.
According thereto upon a suitable base-plate are mounted laterally adjustable
supports adapted to carry boiler-shells of various diameters and lengths so that
their axes shall be horizontal and in the same position, hereinafter referred to as
the centre-line; a standard carrying a face plate or chuck adapted to grip one end
of the boiler shell or drum and furnished with means whereby it and the attached
boiler shell can be rotated in an accurate manner to any desired amount; and a
number of transverse slide-beds on which is mounted so as to be capable of being
moved towards or away from the said centre-line, a main longitudinal slide-bed
carrying one or more tee-grooved slides on which the drill head-stocks and drill
spindles are secured the centres of which are adjustable apart and directed radially
to the centre-line, and means for adjusting the drill head-stock and for rotating
and feeding the drills, the arrangement being such that boiler shells or drums of
different diameters, can be operated upon and that the drill spindles can be
adjusted to different distances apart, are capable of being fed automatically or
adjusted manually, either collectively or separately, and are capable of being put
in and out of action independently of each other.
The drill headstocks may conveniently be arranged in groups each carried by a
slide that is adjustable in a longitudinal direction on the main slide bed.
An adjustable stay is fitted to each drilling headstock for supporting and guiding
the free end of the corresponding drill.
As will be obvious the means employed for supporting the boiler shells for
adjusting the face plate or chuck, in a rotary direction, and for rotating, feeding
and adjusting the drill spindles, may be modified.
In one construction of drilling-machine according to this invention, the supports
for the boiler-shell or drum consist of two series of anti-friction discs or rollers
arranged under the object and mounted in bearings provided in brackets adjustably
fitted on slide-beds arranged at right angles to the said centre-line, two bearings
being provided at different heights in each of the said brackets in order that the
supports may be adapted to carry objects of very different diameters so that their
axis may coincide with the centre-line.
The face plate or chuck for gripping the boiler-shell is rotated by change wheels,
worm gearing and a graduated hand-wheel in proximity to which is a pointer to
facilitate the accurate circular adjustment of the shell.
The main longitudinal slide-bed is moved towards and away from the centre-line
by means of one or more hand wheels on a longitudinal shaft which is in gear, by
means of bevel-wheels, with screws arranged in the transverse slide-beds.
The tee grooved slide or slides carrying the drilling headstocks are adjustable
along the longitudinal slide bed, independently by screw and rotating nut or
together by screw and change wheels for dividing lengthwise.
The drill-spindles are rotated by means of bevel-gear from a shaft which is
mounted on the main longitudinal slide-bed at the side remote from the boiler

page_text: centre-line and is coupled to the spindle of a driving headstock fixed at either end
of the slide-bed. The rotation of each drill spindle may be suspended at will by
sliding one or other of its bevel wheels out of gear. The automatic feeding of the
drill-spindles is effected by means of a cross-shaft which is rotated from the afore-
mentioned spindle-rotating shaft through spur and worm or helical gearing and
rotates through worm gear a shaft which extends from end to end of the machine
and is connected by a feather and groove with a friction clutch attached to a
feeding-wheel mounted on each of the drill-headstocks and adapted to feed the
drill spindle in the direction of its length. A hand-wheel loosely mounted on the
said cross-shaft, but adapted to be readily connected thereto, as by a pawi and
ratchet wheel, allows of the collective adjustment of the drill-spindles, in the
direction of their axes, by hand. By means of the friction clutches any of the
drill-spindles can be put out of connection with the feeding or adjusting
mechanism.
ני.
101 1
Improvements in Drilling Machines.
I, WILLIAM WILSON HULSE, of the Ordsal Works, Regent Bridge, Salford,
in the County of Lancaster, 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 :-
This invention has reference to an improved construction of drilling machine
suitable for drilling cylindrical objects such as boiler shells or drums, as I will now
proceed to explain by reference to the accompanying drawings, wherein,
Fig. 1 is a plan, Fig. 2 a side elevation, Fig. 3 a cross section, and Fig. 4 an end
elevation, showing a drilling machine constructed according to this invention.
Figs. 5, 6 and 7 are sectional detail views, drawn to a larger scale.
The machine comprises a base plate 1 upon which are mounted laterally adjustable
supports 2 adapted to carry boiler-shells of various diameters and lengths so that
their axes shall be horizontal and in the same position (hereinafter referred to as
the centre-line); a standard 3 carrying a face-plate or chuck 4 adapted to grip
one end of the boiler shell or drum 5 to be drilled and furnished with means
whereby it and the attached boiler shell can be rotated in an accurate manner to
any desired extent; and a number of transverse slide-beds 6 on which is mounted,
so as to be capable of being moved towards or away from the eaid centre-line, a
main longitudinal slide-bed 7 carrying one or more tee-grooved slides 8 (two are
shown) on which are secured the drill headstocks 9 carrying the drill spindles 10,
the centres of which are adjustable apart and directed radially to the centre-line,
and means, hereinafter described, for adjusting the drill headstocks 9 and for
rotating and feeding the drill spindles, the arrangement being such that boiler
shells or drums of different diameters can be operated upon, and that the drill
spindles can be adjusted to different distances apart, are capable of being fed
automatically or adjusted manually, either collectively or separately, and are
capable of being put in and out of action independently of each other.
In the construction of drilling machine shown, the supports 2 for the boiler-shell
or drum 5 consist of two series of anti-friction discs or rollers arranged under the
object and mounted in bearings 2" provided in brackets 2b adjustably fitted on
slide-beds 2 arranged at right angles to the said centre-line, two bearings 2* being

page_text: provided at different heights in each of the said brackets in order that the
supports 2 may be adapted to carry objects of very different diameters but so that
the axis of each may coincide with the aforesaid centre-line.
The face plate or chuck 4 for gripping the boiler shell 5 is rotated through
change wheels 5º and worm gearing 5 from a graduated hand wheel 5°, in proximity
to which is a pointer 5d to facilitate the accurate circular adjustment of the boiler
shell necessary for bringing it into proper position to be acted upon by the drills.
The main longitudinal slide-bed 7 is inoved on the transverse slide beds 6
towards and away from the aforesaid centre-line, by means of a hand-wheel 7*,.
(or there may be more than one) fixed on a longitudinal shaft 7b which is in gear,
by means of bevel wheels 7°, with screws 7 arranged in the said transverse slide-
beds 6, which carry the bearings 7 in which the said shaft is supported.
The tee-grooved slides 8 are arranged to be independently adjusted along the
longitudinal slide-bed 7 by means of a screw 84 and rotating worm wheel nut 8B.
so as to bring the drills into proper position for drilling; the screw 84, which
is arranged longitudinally in the slide-bed 7, is in this case held stationary, and
the rotating worm wheel nut, 8B thereon is arranged in gear with a worm 8* upon
a vertical spindle 8 carried by the slide 8 and arranged to be driven in either
direction, according to the desired direction of movement of the slide 8, from
a bevel wheel 8 through one or other of two bevel wheels 84, 8 which are adapted
to be connected with the spindle by a clutch sleeve 8' (Fig. 7). This sleeve is
coned at each end and is adapted in to be put in frictional driving contact with each
of the correspondingly formed bevel wheels 84, 8 by a clutch lever 88 (Figs. 1 and 3).
The bevel wheel 8 is fixed upon a horizontal spindle 8 mounted in a bearing 8'
on the slide 8 and driven from a main driving shaft 11 through skew gear
wheels 8. The spindle 8h is made in two parts and is connected by sliding a bush
on one part, the bush having a projection or tongue which takes into a recess on
the other part of the spindle. The slides 8 can be simultaneously adjusted, when
desired, by rotating the screw 84 by hand, or by power, from the driving shaft 1.1
through spur gearing 11°, shaft 11b, bevel gearing 11°, cross shaft 11ª, bevel
gear 11, vertical shaft 11', reversing gear 118, horizontal shaft 11 and change
wheel gearing 11', the worm wheel nut 8B on each slide 8, being in this case held
stationary. Similar transverse mechanism may be provided if one slide 8 only
be used.
The drill headstocks with spindles are arranged to be adjusted to different
distances apart on the slide 8 carrying them, by providing each of them with a
vertical spindle 9 that is provided at its upper end with a hand wheel, or similar
device or devices and at the lower end with a pinion in gear with a rack 8* on the
slide 8.
The drill-spindles 10 are rotated by means of bevel gear 10° from the maiu
driving shaft 11 which is mounted in bearings 11* on the main longitudinal slide-
bed 7 at the side remote from the boiler centre-line, and is coupled to the
spindle 11 of a driving head-stock 11 fixed at one end of the said slide-bed.
The rotation of each drill-spindle can be suspended at will by sliding one or other
of its bevel wheels 10 out of gear. The automatic feeding of the drill-spindles is
effected by means of a cross-shaft 12 which is rotated from the shaft 11 through
spur and worm or helical gearing 12", 12° respectively and rotates through ratchet-
wheel 12, pawl and hand-wheel 12 and worm and wheel gear at 12, a shaft 13
which extends from end to end of the machine and is connected by a feather aud
groove connection with a friction clutch 14 (Figs. 1, 2 & 5) capable of being
engaged with a feeding-wheel 15 that is mounted on each of the drill-headstocks 9,
and is adapted to feed the corresponding drill spindle in the direction of its length.
For this purpose each feeding wheel 15 may, as shown in Fig. 6, be arranged to
gear with a rack 10° formned on a non-rotary sleeve 10° held end ways on the corre-
sponding drill-spindle 10, which is arranged to rotate with but to move endways
through the bevel wheel 10* on its driving end. The hand-wheel 12ª (Fig. 2),
which is loosely mounted on the said cross-shaft 12, but is adapted to be readily
j

page_text: connected thereto, as by the pawl and ratchet wheel 12° (Fig. 2), allows of the
collective adjustment of the drill-spindles 10, in the direction of their axes, by hand
when necessary. By means of the friction clutches 14 or other equivalent means,
any of the drill-spindles can be put out of connection with the feeding or
adjusting mechanism when desired, and adjusted endways independently of the drill
spindles.
An adjustable stay 16 is fitted to each drilling headstock 9 for supporting and
guiding the free end of the drill 10* carried by the corresponding drill-spindle 10.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
1 claim is
1. A drilling machine suitable for drilling cylindrical objects such as boiler
shells or drums, wherein the drilling headstocks and one or more longitudinally
movable slides carrying the same, are inounted on a main longitudinal slide-bed
that is carried by number of transverse slide beds and is moved towards and
away from the centre line of the machine by means of one or more hand-wheels
fast on a longitudinal shaft that is in gear by means of bevel wheels with screws
carried by the transverse slide beds and connected with the said slide bed,
substantially as herein before described with reference to the drawings annexed.
2. A drilling machine suitable for drilling cylindrical objects such as boiler
shells, wherein each drill spindle is rotated by gear wheels from a longitudinal
rotary shaft mounted on a main longitudinal slide-bed and is fed endways from a
second longitudinal rotary shaft by a feeding wheel adapted to be connected with
said second longitudinal shaft by a clutch, the arrangement being such that each drill
spindle can be put separately in and out of driving connection with the shaft for
rotating it and also in and out of driving connection with the shaft for feeding it,
substantially as herein described.
3. The combination with the longitudinal feed shaft referred to in the preceding
claim, and mechanism for rotating it from the main driving shaft of the machine,
of a hand wheel that is normally loose but is adapted to be readily connected with
said mechanism, or a part thereof, so as to allow of the collective adjustment of
the drill spindles, in the direction of their axes, by hand, substantially as herein
described.
4. The combination and arrangement of parts constituting my improved drilling
machines herein before described with reference to and shewn in the drawings
annexed.
Dated this 18th day of July 1895.
WILLIAM WILSON HULSE.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.