IMPROVEMENTS IN DRILLING MACHINES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said William Cooke at the Office
of the Commissioners of Patents on the 8th January 1883.
"
WILLIAM COOKE, of Dundee, in the County of Forfar, North Britain, Engineer,
IMPROVEMENTS IN DRILLING MACHINES
"
This Invention has for its object to construct a drilling machine in an improved
manner and so as to be specially and very conveniently adapted for particular
kinds of work.
In the improved machine the working parts are carried by a vortical pillar
secured to a suitable foundation and fitted with a tubular part capable of sliding
vertically upon it. The tubular sliding part of the pillar carries a head which is
fitted with bearings for a horizontal drilling spindle and with a handwheel and
feeding screw. The head can be turned round on the pillar by means of a pinion
carried by the head and gearing with a spur-toothed ring fixed on the movable
part of the pillar; and the movable part of the pillar can be adjusted vertically
by means of a screw at one side, this screw having a worm wheel at its upper end
with which there gears a worm on a horizontal spindle having also on it a band-
wheel. In moving vertically the tubular part is guided by a slot through which a
stud is screwed into the fixed pillar this stud being formed with a head which fixes
the movable part in position when the stud is screwed up. The horizontal drill
spindle is driven by bevil wheels from a vertical shaft which rises and falls with the
movable part of the pillar and engages by means of a groove and feather with a
bevil wheel at the foundation this bevil wheel being in gear with a bevil wheel on
a horizontal driving shaft below the floor level. The head is provided with an
adjustable claw bar or holding-up arm for keeping up to the drill whatever article
is being operated upon.
The improved machine may be very advantageously used for drilling from the
inner side rings or flanges such as those of the furnace fronts of steam boilers; and
it may also be used for drilling rivet or stay holes of fireboxes and for counter-
sinking such holes on the inside. The article to be operated upon is moved by a
crane or any suitable hoisting apparatus so as to encircle or enclose the drilling
machine which can then be adjusted and set to work upon it.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Cooke in the Great Seal Patent Office on the 5th July
"
1883.
WILLIAM COOKE, of Dundee, in the County of Forfar, North Britain, Engineer,
IMPROVEMENTS IN DRILLING MACHINES
"
My said Invention has for its object to construct drilling machines in an improved
manner, and so as to be specially and very conveniently adapted for particular
kinds of work.
In one modification of my improved machines the working parts are carried by
a vertical pillar secured to a suitable foundation, and fitted with a tubular part
capable of sliding vertically upon it. The tubular sliding part is adjustable
vertically and carries a head having a horizontal drilling spindle and feeding screw,
the spindle being driven by means of bevil wheels from a shaft in the axis of the
pillar. The head is provided with means for placing it in various positions, and
with an adjustable claw bar or holding-up arm for keeping up to the drill whatevor.
article is being operated upon.
My improved machine may be very advantageously used for drilling, from the
inner side, rings or flanges such as those of furnace fronts of steam boilers; and it
may also be used for drilling rivet or stay holes of fireboxes and for counter-
sinking such holes on the inside. The article to be operated upon is moved by a
crano or any suitable hoisting apparatus so as to encircle or enclose the drilling.
machine, which can then be adjusted and set to work upon it.
And in order that my said Invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings to
be hereinafter referred to and representing my improved machine, figure, 1, being
a plan, figure 2, an elevation, and figure 3, a vertical section. In these figures the
same reference numerals are used to mark the same or like parts wherever they are
repeated.
The movable parts of the machine are carried upon a vertical pillar, 4, formed
with a base plate, 5, for being bolted down to a suitable foundation. The upper
part, 6, of the pillar is of a reduced diameter and is turned externally to receive a
tubular piece, 7, which can slide vertically upon it, and for moving which a screw
spindle, 8, is provided at one side. This screw spindle, 8, is held in a bracket, 9,
formed on the tubular piece, 7, and works in a nut fixed in a lug, 10, cast upon the
side of the pillar, 4. A wormwheel, 11, is fixed on the top of the screw spindle, 8,
and is acted on by a worm, 12, on the spindle of which there is a handwheel, 13.
When adjusted vertically by turning the handwheel, 13, the tubular piece, 7, can
be fixed in position by a pinching screw, 14, entered through a vertical slot in the
movable piece into a tapped hole in the pillar, 4.
On the top of the tubular piece, 7, there is set a circular head, 15, which is
secured by a malleable iron ring, 16, made in halves and fixed to the head by
screws so as to engage under a flange formed round the top of the tubular piece, 7,
and below this ring, 16, there is a spurwheel, 17, which is also in halves and is
fixed on the tubular piece. The spurwheel, 17, is for turning the head by, there
being in gear with it a pinion, 19, on a spindle carried in a vertical tubular
bearing, 20, formed on the head, 15, and having a handwheel, 21, at its upper end.
When the head has been turned round into any required position by means of the
band wheel, 21, it can be held by means of a pinching screw, 22.
The head, 15, is formed with bearings, 23, in which is carried a horizontal drilling
spindle, 24, with its feeding screw, 25, the latter working in an internally screwed

page_text: bush, 26, having fixed on it a handwheel 27, but the screw, 25, is prevented from
turning by a groove formed along it and into which there projects a guide finger, 28,
fixed to the bearing. The cap, 29, of one of the bearings is formed with a clamp
or split socket, 30, for holding a claw bar, 31, which can be secured by drawing
the sides of the clamp together by a screw bolt. The end of this bar, 31, is mado
with prongs to bear upon the outer side of the work which is being drilled to hold
it up against the drill.
The drill spindle, 24, is driven by bevil wheels, 32, from a vertical shaft, 33,
carried by and moving with the head, 15, and tubular piece, 7. The vertical
shaft, 33, extends down below the pillar, 4, and passes through the elongated boss
of a bevil wheel, 34, from which it receives motion by a groove and feather,
admitting of its vertical movement when the tubular piece, 7, is raised or lowered.
The bevil wheel, 34, is held in a bearing in a bracket, 35, bolted to the underside
of the base plate, 5, and is in gear with a bevil wheel, 36, on a first motion shaft,
37, having on it fast and loose pulleys, 38, for a driving belt.
My improved machine can be made of different sizes to suit various classes of
work; and it can be fixed against a wall with the pillar or trunk, 4, horizontal
instead of vertical; or it may be fixed in any positions that may be convenient for
special purposes. The machine may be fixed on a bogie or truck so as to be
movable from place to place, and it may have any suitable motor combined with it.
Automatic gear of any suitable kind may be applied to feed forward the drill
spindle.
Having thus particularly described my said Invention and the manner of
performing the same I have to state that I do not restrict myself to the precise
details herein described or delineated but that what I believe to be novel and
original and claim as the Invention secured to me by and in terms of the herein-
before in part recited Letters Patent is :-
The arranging and combining together of the parts of drilling machines substan-
tially in the improved manner hereinbefore described.
In Witness whereof I, the said William Cooke, have hereunto set my hand
and seal this fourth day of July in the year of our Lord One thousand eight
hundred and eighty-three.
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