Improvements in Machinery for Drilling, Screw-tapping, and the like.
Year: 1892

page_text: Date of Application, 31st May, 1892
Complete Specification Left, 21st Feb., 1893--Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Drilling, Screw-tapping, and the like.
I, CHARLES MERSON DAVIES, M.I.M.E., Chief Engineer to Messieurs Dubs
and Company, Glasgow, Locomotive Works, Aitkenhead Road Glasgow, in the
County of Lanark, North Britain, do hereby declare the nature of this invention
to be as follows, that is to say :-
My said invention comprises what may be termed plural drilling machinery to
distinguish it from what is known as multiple drilling machinery. The object of
my invention is by improved constructive details to provide for simultaneously
drilling or otherwise operating on a number of holes in a locomotive boiler, or other
boiler or structure of iron or steel or other materials. My improved machinery
will greatly facilitate drilling and like operations and considerably diminish the
expenditure of time and labor heretofore required for such work.
In carrying out the invention according to one modification, and in the case, for
example, in which a locomotive boiler is to be operated on, I arrange two parallel
benches of length corresponding to that of the boiler, and at such distance apart
that the boiler can be conveniently placed between them. On each bench V-guides
are provided for saddles or bearers, which carry hollow curved pillars the inner
sides of which are of the shape of a circular quadrant in a vertical plane the upper
end overhanging. The pillars are fitted so that they can be turned about vertical
axes passing through the centres of their saddles worm and worm-wheel gearing
being provided for thus turning them. There are on the two benches six or other
convenient number of pillars arranged so as not to interfere with each other.
Each pillar has formed on it V-guides for a small saddle which carries a drill
head, this saddle being adjustable along the pillar by means of a worm and a
pinion gearing with a rack on the pillar. Each drill head can be adjusted in any
required angular position in a vertical plane on its saddle, any angular position in
a horizontal plane being obtained by turning the pillar on its saddle. The driving
power is derived from overhead shafts parallel to the benches, being communicated
therefrom by bevil wheels movable along the shafts with grooves and feathers, and
gearing with bevil wheels having vertical axes and carried by the pillars. From
the bevil wheels of each pillar, suitable gearing with engaging clutches drive a
grooved pulley a rope from which passes round suitably arranged guide pulleys and
round a driven pulley on the drill head. The rope also passes round guide pulleys
to a weight which is arranged in a vertical casing which weight gives the necessary
tension and also allows the rope to accommodate itself to the various positions
which the drill head may assume. Each pillar also carries gearing with engaging
clutches for turning in either direction a vertical shaft having at its lower end a
pinion gearing with a fixed rack in the bench and which serves for moving the
pillar along the bench when required.
The curvature of the pillars allows of the drill heads being placed at the side
of or directly above the work, whilst the other arrangements allow of the drills
being directed at any angle that may be required.
Dated this Thirtieth day of May 1892.
EDMUND HUNT,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Drilling, Screw-tapping, and the like.
I, CHARLES MERSON DAVIES, M.I.M.E., Chief Engineer to Messieurs Dubs
and Company, Glasgow Locomotive Works, Aitkenhead Road, Glasgow, in the
County of Lanark, North Britain, 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 comprises what may be termed plural drilling machinery to
distinguish it from what is known as multiple drilling machinery. The object of
my inventiou is, by improved constructive details, to provide for simultaneously
drilling, or otherwise operating on a number of holes in a locomotive boiler or
other boiler or structure of steel or iron or other materials. My improved
machinery is designed to greatly facilitate drilling and like operations, and consider-
ably diminish the expenditure of time and labor heretofore required for such work.
In carrying out the invention according to one modification, and in the case, for
example, in which a locomotive boiler is to be operated on, I arrange two parallel
benches of length corresponding to that of the boiler, and at such distance apart
that the boiler can be conveniently placed between them. On the benches are
mounted hollow curved pillars with overhanging upper ends, and which can be
adjusted into different positions about vertical axes; and each pillar carries a drill
head or like tool, which can be adjusted in various positions.
The curvature of the pillars allows of the drill heads being placed at the side of
or directly over the work, whilst the other arrangements allow of the drills being
directed at any angle that may be required.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append four sheets of explanatory drawings
to be hereinafter referred to and representing my improved machinery.
Figure, 1, on Sheet, 1, of the drawings is a sectional side elevation of one of the
pillars. Figure, 2, Sheet, 2, is a sectional elevation of part of the concave side of
a pillar; and Figure, 3, is an enlarged sectional view of part of the gearing at the
upper part of the pillar. Figure, 4, Sheet, 3, is a sectional plan of a drill head and
of the part of the pillar to which it is attached; and Figure, 5, is an elevation
corresponding to Figure, 4. Figures, 6, to, 9, Sheet, 4, are views explanatory of
part of the driving-rope arrangements; and Figure, 10, is a small-scale plan
showing the general arrangement of a set of pillars. In these drawings the same
reference letters and numerals are used to mark the same or like parts wherever
they are repeated.
In Figure, 10, a locomotive boiler, A, is shown in a position to be operated on
by means of my improved machinery, being placed between a pair of parallel
benches, B, on which are set six pillars, C, constructed for holding drills, D, or
like tools in various positions, the pillars, C, being adjustable longitudinally and
at various horizontal angles, whilst the drills are adjustable on the pillars at various
angles in the vertical planes of the pillars. On each bench, B, V-guides are pro-
vided for saddles or bearers, B 1, which carry the pillars, C, these pillars being
hollow and of a curved form, their inner sides being of the shape of a circular
quadrant in a vertical plane with the upper end overhanging. The pillars, C, are
not fixed to their saddles or bearers, B 1, but are secured thereto by V-rings, B 2,
bolted to the saddles, being fitted to turn within the rings and upon the saddles
about vertical axes. The turning adjustment of each pillar, C, is effected by
means of a worm, C 1, carried by the pillar and gearing with a wormwheel, B 3,
formed on an upwardly projecting central part formed on the saddle, B 1.
Each pillar, C, has formed on its concave side V-guides, C 2, for a small saddle, E,
which carries a drill head, D1, this saddle, E, being adjustable along the pillar
by means of a pinion, E 1, gearing with a toothed rack, C3, fixed to the pillar.

page_text: The pinion, E 1, is driven by another pinion, E 2, fixed to a wormwheel, E 3, which
is acted on by a worm, E4, on a spindle having on it a handwheel, E 5. The drill
head, D 1, is held, in a sleeve or socket, E 6, formed on the saddle, and can be
adjusted with its spindle, D, in any angular position in a vertical plane, any
angular position horizontally being obtained by turning the pillar, C, on its.
saddle, B 1.
The driving power is derived from overhead shafts, F, parallel to the benches, B,
being communicated therefrom by bevil wheels, F 1, movable along the shafts
with grooves and feathers, the bevil wheel for each pillar, C, gearing with a bevil
wheel, G, having a vertical axis coincident with the vertical axis about which the
pillar can turn. The bevil wheel, G, is in one piece with (or might have fixed to
it) a bevil wheel, G 1, which gears with a bevil wheel, G2, on a horizontal
shaft, G 3, having on it a clutch, G 4, operated on by levers connected by links, G 5,
to a weighted lever, G 6, for putting into or out of gear a bevil wheel, G 7, which
drives a bevil pinion, G 8, on a shaft, G 9, having also on it a grooved rope pulley, H.
When the clutch, G 4, has to be out of gear, the weighted lever, G 6, is held up
by a hook hinged to the framing. The driving rope, R, which receives its motion
from the pulley, H, passes from the under side of that pulley round a guide
pulley, HI, at the top of a vertical casing, J, thence over a loose pulley, H 2, on
the shaft, G 9, and next round the pulley, K, of the drill head, returning over a
second loose pulley, H 3, on the shaft, G 9. From the pulley, H 3, the rope pro-
ceeds. over a second guide pulley, H 4, at the top of the casing, J, thence down
into the casing and round a pulley, H 5, in a block to which a tension weight is
attached, returning up and over a third guide pulley, H6, at the top of the
casing, J, to the driving wheel, H. With this arrangement the two sides of the
loop of the rope, R, passing round the drill-head pulley, K, are always suitably
guided by the pulleys, H2, H3, on the shaft, G 9, for any position of the drill
head on the pillar, C. Sufficient space is provided in the casing, J, to allow by the
up or down movement of the weighted block for different lengths of a rope between
the guide pulleys, H2, H3, and the drill-head pulley, K, required for the different
positions in which the drill head, D 1, may be placed.
The bevil wheel, F 1, which gives motion from the shaft, F, to the gearing of
each pillar, C, is held in a bearing, F 2, at the upper end of a vertical spindle, F 3,
which extends downwards through bearing bushes in a tubular part, L, bolted to a
bracket, L 1, bolted to the outer or convex upper part of the pillar, C. The said
tubular part, L, has rotating on it the two hevil wheels, G, G 1, through which
motion is transmitted from the bevil wheel, F 1. The bevil wheel, G 2, driven by
the bevil wheel, G 1, has elongated teeth, or a smaller set of teeth, which gear with
and drive a bevil wheel, M, on a short shaft, M 1, having on it a pulley, M 2,
which by open and crossed belts drives pulleys, M 3, M 4, on a horizontal shaft, M 5,
carried by a bracket, M 6, at about mid height of the pillar, C. The
pulleys, M 3, M 4, are loose on their shaft but either can be engaged therewith by
means of a clutch, M 7, movable by hand levers, M 8. The shaft, M 5, has on it a
worm gearing with a wormwheel, N, on the upper end of a vertical shaft, N 1,
held in the axis of the pillar, C; and the lower end of the shaft, N 1, bas on it a
pinion N 2, gearing with a toothed rack, B4, fixed to the bench, B, at the side of
a longitudinal groove formed along the top of the bench. The arrangement
of the gearing thus described serves for moving the pillar along the bench when
required.
The constructive details of the drill head are fully shown in Figures, 4, and, 5,
and are the same as those described in my Patent Specification No. 10330 of 1892,
no claim being made respecting them in the present Specification.
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. The improved combination of machinery for drilling, screw-tapping, and

page_text: the like operations, substantially as hereinbefore described and shown in the
accompanying drawings.
2. The improved machinery for operating on a locomotive boiler or other
structure and comprising a pair of parallel benches having longitudinally and
horizontal-angularly adjustable upon it a number of pillars having drilling or like
tools angularly adjustable upon them in their vertical planes, the parts being
arranged and operating substantially as hereinbefore described.
Dated this Twentieth day of February 1893.
EDMUND HUNT,
Applicant's Agent.