Improvements in Multiple Radiating Drilling Machines.
Year: 1899

page_text: Date of Application, 26th June, 1899-Accepted, 7th Oct., 1899
COMPLETE SPECIFICATION.
Improvements in Multiple Radiating Drilling Machines.
We, BABCOCK & WILCOX, LIMITED, of 147, Queen Victoria Street, in the City
of London, Steam Boiler Manufacturers, and HAROLD BULKELEY REYNOLDS,
Engineer in the employment of said Company, 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 relates to multiple radiating drilling machines for use princi-
pally in drilling boiler shells and similar articles, and it has for its object particu-
larly the improvement of certain details hereinafter referred to whereby, firstly,
the work can be adjusted vertically, secondly, the drill carriages are revolved
simultaneously, but can be set in any desired relation to each other, and thirdly,
the drills are rendered adjustable and can be withdrawn without removing the
work should they break, or require to be renewed.
As illustrated in part elevation and part vertical section at Fig. 1, and in plan at
Fig. 2 of the accompanying drawings, the machine consists of a cylindrical main
framing A on the upper end of which is formed a circular guideway A¹ whereon
a ring B carrying drill carriages C travels in order to bring the carriages C to
This motion is
the position for drilling the several series of holes in succession.
communicated to the ring B which has teeth B¹ formed on its outer periphery
and gears with a spur pinion D operated by a hand wheel E, the drill carriages
being thus traversed round the work to bring them into position so that the
desired holes, can be drilled, the work remaining stationary. The work is
carried between chucks F on a table G which has a vertical motion only and that
is also imparted to it by hand through a hand wheel H keyed on a shaft having
on it a bevel wheel I which gears with a similar wheel J on a vertical spindle K.
This spindle K is screw-threaded for a portion of its length and it is threaded into
a nut L secured to a central pillar Gi formed integral with and supporting the
table G, the pillar G¹ having its socket M secured to the main framing A, the
screw acting to raise or lower the table sò that successive rows of holes may be
drilled. A bevel wheel N centred on the outside of the socket M is geared to
a bevel wheel O on the pulley shaft P, and the bevel wheel N has secured upon
its boss a toothed wheel Q which engages like wheels R on vertical spindles S,
one of which is carried in bearings in each of the drill carriages C. Each of
these spindles S has at its upper end a bevel wheel T which gears with a bevel
wheel U adapted to rotate the drill holder V, through the intervention of a sleeve W
carrying a feather engaging the wheel U. The drill holder V consists of a
spindle of octagonal or other shape with the usual socket for retaining the drill,
and this holder V is fitted within the sleeve W which is hollow and has a bush
with octagonal hole W¹ fixed in its forward end to engage the octagonal portion

page_text: of the holder V, in order to turn it, the sleeve W having keyed upon it at this
end the bevel wheel U, which has its bearings in the carriage C. Surrounding
the sleeve W is a block W, situated between a collar and nut on said sleeve,
having rack teeth formed on it with which a sector X gears, which sector X is
acted upon by a cam Y on a shaft Z to effect the forward feeding of the drill
during the boring operation, a quick withdrawal being obtained by means of a
spiral spring Y acting on the sector X on the opposite side to the cam Y. The
shaft Z has motion communicated to it from a worm wheel 7 keyed thereon,
which in turn receives its motion from a worm Z2 keyed on the same shaft as a
worm wheel 73, worm 7+ and toothed wheel Z, the latter receiving its motion from
a like wheel W2 keyed upon the sleeve W. At the end of the sleeve W opposite
to the drill a long nut W³ is inserted which engages a threaded portion VI of the
drill holder V, so that when the nut W on the end of the sleeve W has been
removed the position of the drill towards or from the work can be adjusted, the
sleeve W being thereafter covered on its end by the nut W. Should a drill
break or require to be renewed, this nut. W is screwed off and the entire holder,
together with its adjusting nut W³, can be withdrawn from the sleeve W, and a
new tool inserted without removing the work.
A tray or receptacle A2 is arranged centrally above the main driving gear N, O,
and extending outwards to the drill carriages C, which tray prevents the borings
from passing in among the gear wheels, and also receives the oil, soapy water
or other lubricant discharged on to the drills, allowing it finally to pass out at
one point into a collecting trough A³, formed in the bottom of the main framing,
whence it may be pumped up to be used over again.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
:-
.I'
1. A multiple radiating drilling machine, the parts of which are constructed,
combined and arranged to operate, substantially as described.
2. In a multiple radiating drilling machine, a work table having a central
supporting pillar to which is secured a nut engaging a screw-threaded shaft
operated by gearing from a shaft provided with a hand wheel, whereby the work
can be adjusted vertically, substantially as described.
3. In a multiple radiating drilling machine, a series of drill carriages radially
disposed on a ring secured on the main framing, said carriages being adjustable
upon the ring in relation to each other and being carried round the work simul-
taneously by means of said ring which is toothed and operated by gearing from
a hand wheel, substantially as described.
4. In a multiple radiating drilling machine, the improved arrangement of
driving gear, substantially as described.
5. In a multiple radiating drilling machine, the means for feeding forward and
withdrawing the tool consisting of a sleeve surrounding and forming the socket for
the drill, a bevel wheel engaged by a feather on the sleeve, a block situated between
a collar and nut and having rack teeth formed on it, which are engaged by a
sector actuated to feed forward the drill by means of a cam on a shaft actuated
by gearing from the drill sleeve against the power of a spring for effecting the
rapid withdrawal of the drill, substantially as described.
6. In a multiple radiating drilling machine, the combination of a tool holder
and a sleeve for rotating said tool holder, the said sleeve having at its forward end
a bush with octagonal or other shaped hole for engaging the holder, and having
loose within its outer end a screw-threaded nut adapted to engage the screw-
threaded outer end of the holder for the purpose of adjusting the tool in relation
to the work, substantially as described.
7. In a multiple radiating drilling machine, the arrangement in combination
of a trough formed in the main frame to collect the surplus oil, soapy, water or
other lubricant employed in the drilling operation, and a tray arranged centrally

page_text: beneath the drill spindles to prevent the borings from dropping among the gear
wheels, whilst also serving to direct the lubricant into the trough substantially as
described.
Tune 1899
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agent for the Applicants.