IMPROVEMENTS IN DRILLING MACHINES
Year: 1884

page_text: I WILLIAM ROBERT LAKE of the firm of Haseltine Lake & Co Patent Agents
Southampton Buildings in the County of Middlesex do hereby declare the nature
of said invention for "IMPROVEMENTS IN DRILLING MACHINES" to be as follows:-
This invention relates to drilling machines and has for its object to provide a
suspended drilling machine, that is, a machine projecting downwardly from the
ceiling or timbers overhead, leaving the entire floor space beneath it free for
occupancy by any work, however bulky, on which the machine is to operate; said
machine being furnished with a radial arm or frame adapted to swing entirely
around the central shaft, and carrying the sliding head and geared drill stock
adjustable up and down, and toward and from the central shaft, so as to bring the
tool to bear upon any part of the work lying within the entire circle, except
immediately beneath the central portion of the hanger.
The hanger or depending body of the machine is preferably a hollow casting
supporting, in fixed bearings, a short horizontal counter-shaft, connected by bevel
gear wheels with a vertical central shaft, which, by similar gearing at its lower end,
gives rotation to a sliding, horizontal, shaft, which in turn, by like means, actuates
the rotary and vertically moving drill.
The invention consists in the novel construction and combination of parts as
hereinafter set forth.
According to the said invention the hollow hanger is bolted to a beam, and
oblique braces may be furnished, if required, for special steadiness. A countershaft
passes horizontally through the hanger, and has its bearings in projections thereon.
The said countershaft carries suitable speed-pulleys, and, within the hanger, a bevel
gear wheel engages with another on a vertical shaft which has its bearings centrally
in the hanger. When the hanger is hollow, an opening adjoining the counter-shaft
is desirable for access to the gearing within. The hanger may, however, be of
skeleton form with advantage.
The lower part of the hanger is cylindrical, and occupies the upper and lower
bearings of a swinging frame which is free to revolve thereon, when desired, entirely
around the hanger and the enclosed shaft. This frame is held up in its position

page_text: by a nut at the bottom of the hanger, or by a sleeve secured by a set screw to the
lower part of the hanger or by other suitable means adapted to sustain the frame
and drilling mechanism upon the cylindrical part of the suspended hanger without
obstructing their rotation thereon in a horizontal plane.
A set screw may fix, temporarily, the position of the swinging frame in any
direction, radially from the hanger, should it be desired.
A projection from the bottom of the swinging frame near its axis forms one
bearing for a horizontal shaft which is splined so that it may slide lengthwise
through, but must revolve with, a bevél gear-wheel mounted on it and engaging
with a bevel gear wheel at the lower end of the vertical shaft.
The other bearing for the horizontal shaft is in a projection formed at the bottom
of a sliding head which head also furnishes bearings for a vertical drillstock. The
bearings are so located that the bevel gear wheels on the horizontal shaft and drill-
stock will engage with each other.
The swinging frame extends in a vertical plane at one side of, and parallel to,
that of the horizontal shaft and drill-stock, to facilitate the movement of the
sliding head which is grooved to fit upon ribs of the frame, and has a projection
with an enlarged head or collar extending through a long slot in the said frame.
The movement of the head and connected parts toward and from the hanger may-
be effected directly by hand or by a hand wheel and a pinion engaging with a rack
on the lower edge of the frame.
The sliding head has a standard formed with or bolted firmly to it, with a pulley
at its top, over which runs a rope or chain having at one end a counter balance
weight held by wings so as to slide vertically up and down the said standard. The
other end of the chain is secured to a vertical rack-bar adapted to move up and
down in a recess in the head and having a short arm engaging by a shoulder and
nut with the upper end of the revolving drill-stock.
The vertical rack-bar engages, by its teeth, with a pinion mounted on the sliding
head and furnished with a hand wheel or crank by which the rack and drill may
be raised or lowered. The drill-stock is splined so that, while free to move vertically
through, it must continually revolve with the bevel gear wheel..
Under the arrangement above described, provision is made for continuous
rotation of the drill, reamer, or other tool inserted in the base of the drill stock;
for raising the tool freely and lowering it with force sufficient to accomplish its
work; for moving the drill, and the head or carriage upon which it is mounted,
radially toward and from the hanger which supports the entire mechanism from
above; and for swinging the frame and parts borne upon it, entirely around said
hanger in a horizontal plane,
I thus provide a most efficient machine, having greater capacity and capable of
boring a large number of holes over a widely extended annular area without
moving the work, and with certainty that the axes of all the holes will be
parallel.
By moving the material to be operated upon, relatively to the machine, any part
of a casting or other substance however large, is brought within the capacity of the
machine, and directly beneath it.
I do not limit myself to the details of construction herein before described since
other well known forms of apparatus may be employed with my peculiar hanger,
without departing from the nature of this invention.
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: is splined so that it may slide lengthwise through, but must revolve with, the bevel-
gear G¹ mounted on it and engaging with a gear D¹ at the lower end of the shaft D.
The other bearing for the shaft G is in a projection H¹ formed at the bottom of the
sliding head H, which head also furnishes bearings at h for the vertical drill stock
or shaft I. The bearings H¹ and h are so located that the bevel-gears g and i on
the shafts G and I will gear together.
The swinging arm or frame E, as best shewn in Figure 3, extends in a vertical
plane at one side of, and parallel to, the shafts G and I to facilitate the movement
of the sliding head H which is grooved to fit upon ribs e of the frame, and has a
projection H with an enlarged head or collar extending through a long slot U in
said frame.
The movement of the head and connected parts toward and from the hanger A
may be effected directly by hand or by the hand wheel K and its pinion K¹ engaging
with the rack k shewn on the lower edge of the frame.
The head H has a standard M formed with, or bolted firmly to, it, with a pulley P
at its top over which runs a rope or chain N, having at one end a counterbalance-
weight O held by wings o so as to slide vertically up and down the standard M.
The other end of the chain is secured to a vertical rack-bar R, adapted to move up
and down in a recess in the head and having a short arm R¹ engaging by a shoulder
and nut with the upper end of the revolving drill-stock I. The sliding rack-
bar R R engages by its teeth with a pinion S mounted on the head H and
furnished with a hand-wheel or crank T by which the rack and drill may be raised
or lowered. The drill-stock I is splined, as denoted in Figure 1, so that while free
to move vertically through it, must continually revolve with the bevel gear i.
Under the arrangement above described provision is made for continuous rotation
of the drill, reamer, or other tool inserted in the base of the stock I; for raising the
tool freely and lowering it with force sufficient to accomplish its work; for moving
the drill and the bead or carriage upon which it is mounted radially toward and
from the hanger which supports the entire mechanism from above; and for swinging
the frame and parts borne upon it entirely around said hanger in a horizontal
plane.
A most efficient machine is thus provided having great capacity, economy, and
convenience, and enabling, for instance, a large number of holes to be bored over a
widely-extended annular area without moving the work, and with certainty that
the axes of all the holes will be parallel.
By moving the material to be operated upon relatively to the machine, any part
of a casting or other substance, however large, is brought within the capacity of the
machine, and directly beneath it.
No claim is made to a drilling-machine of the class described in the specification
of Letters Patent dated 8th July AD 1872 N° 2056 which stands upon a bed or
floor and projects upwardly therefrom, thus occupying the floor-space beneath the
machine, which, by this invention, is left free for the work being operated upon. In
the improved machine the drill-carrying frame swings in a horizontal plane entirely
around the vertical cylindrical part of the suspended hanger, to bring the tool to
bear upon the work placed between the machine and the floor.
Neither is the described drilling mechanism claimed by itself independently of
the hanger by which it is suspended for complete rotation. I do not limit myself to
the details of construction of such mechanism, nor to the specific means shown for
actuating it, since other well known forms of apparatus for those purposes may be
employed with the peculiar hanger without departing from the nature of this
invention.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is:-
:-
First In a drilling-machine, a vertically-suspended hanger adapted to support
the drilling apparatus from the beams above it, and provided with a cylindrical
portion around which said apparatus may be revolved, in combination with an arm

page_text: or frame adapted to swing entirely around said banger, a sliding head mounted for
radial movement on said frame, a tool-stock having a vertical movement on said
head, and a connected system of shafts and gearing, for the purposes set forth.
Second The depending hanger A with its vertical cylindrical portion A¹ and
supporting nut or sleeve F, and the vertical shaft D adapted to revolve therein, in
combination with a radial frame swinging in a horizontal plane around the hanger,
a tool-carrying head arranged to move lengthwise of the frame, a horizontal shaft
having bearings in said frame and head, and a tool-stock having a fixed and a
sliding bearing carried on such head, said shafts being connected by bevel-gears,.
substantially as, and for the purpose, set forth.
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HASELTINE, LAKE & Co.,
For the Applicant..