Year: 1886

page_text: 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:-
Figure 1 is a perspective view of the drill head as arranged for use.
Figure 2 is a cross section of the same upon a vertical axial line.
Figure 3 is a like view upon an enlarged scale of said head mounted upon a short,
auxiliary spindle which is adapted to be inserted in the end of an ordinary drill-
spindle, as an extension of the same.
Fig. 4 is a side elevation, partly in vertical section of the drill head provided
with back gearing and reversible gear.
Figure 5 is a section of the same upon line x-x of Fig. 4.
Figure 6 is a side elevation of the improved tool with its counterboring end in
position for use.
Figure 7 is a front elevation of the same.
Figure 8 is a cross-section upon line - of Figs. 6, and 7 and
Figure 9 is a side elevation of the counterboring end of said tool and a vertical
section of a piece within which it is operating..
Letters of like name and kind refer to like parts in each of the figures.
In the construction of machinery it is often necessary that one part should be
successively operated upon by several drills of different sizes or shapes, or by drills
followed by reamers, facing and countersinking tools, or screw-taps, and in order
that accuracy may be secured it is desirable that the article being operated upon
should not be moved from position until each tool has been used. In such cases it
has heretofore been necessary that each tool when used should be removed and
replaced by the tool next in order, one spindle being employed for all.
To obviate this difficulty, and to enable either of a number of drills or other like
tools to be easily and quickly brought into one predetermined position for, use, is
the design of my invention, to which end said invention
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1
Consists principally, as an improvement in drill presses, in a head or turret
which has journalled therein a number of special drill spindles, and is in turn
journalled upon an obliquely arranged arm that is secured upon and moves vertically
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page_text: with the lower end of an ordinary drill spindle, whereby, by the rotation of said
head upon its journal, either of said special drill spindles may be brought into line,
axially, with said ordinary drill spindle and then caused to engage with and be
rotated by the same, substantially as and for the purpose hereinafter specified.
It consists, farther, in an improved device for use in drill presses, composed of a
forked stock, that is adapted to be secured within and revolved with a drill spindle
and a tool which is pivoted centrally within or between the forks of said stock and
at each end is adapted for use in forming, threading, counter-boring, or otherwise
operating in connection with a hole, in combination with means, substantially as
shown, whereby said tool may be locked in line axially, with said stock, substan-
tially as and for the purpose hereinafter set forth.
It consists, farther, as a means for counter-boring the inner end of a hole, in a
bar which is adapted to loosely fill and be revolved within the same, and a cutter,
that is pivoted within the lower end of said bar, and is adapted, by pressure against
the end of the hole, to be forced radially outward, substantially as and for the
purpose hereinafter shown and described.
In the carrying into effect of my invention, I journal upon the lower end of the
spindle A, of an ordinary drill-press a sleeve, B, from one side of which an arm, b,
extends radially outward and engages with a vertical guide that is formed upon or
within the frame of said drill-press, the arrangement being such that said sleeve
will move freely in a vertical direction with said spindle, but is prevented from
rotating with the same.
From a suitable point upon the sleeve B preferably opposite to the arm, b,
a second arm, b¹ projects obliquely downward and outward and forms a journal
bearing for a head, C, that is adapted to rotate freely thereon. Said head has at
various points equi-distant from the oblique axis a number of special drill spindles D,
each of which has such radial position and axial line with reference to the axis of
said head, as to enable it, by the rotation of the latter, to be brought directly
beneath the spindle, A, and into a line, axially with the same. .
The lower end of the spindle, A, is provided with an axial opening, a, preferably
round, into which is fitted a correspondingly shaped metal bar, A¹, that is adapted
to move longitudinally within certain limits, but by means of a dowel-pin, a³, or
other equivalent device is prevented from rotating except with said spindle, A
spring, a, placed above said bar holds the same, with yielding pressure at the
lower limit of its motion.
Within the lower end of the bar A¹, is provided a socket, a³, which corresponds
to and is adapted to fit over and engage with the upper end, d¹, of each of the
spindles D, as the same are brought into position beneath the spindle A, and thereby
cause the rotary motion of the latter to be communicated to the former. The
lower end of said socket bar being bevelled outward and upward, the said bar will
be automatically pressed upward by each of said spindles, D, when moved to place,
until the latter are in line, axially, with said spindle, A, after which said socket
bar will be returned to position by the spring, a³, and held in engagement with the
said squared end, d.
By means of the mechanism shown, a number of drills, reamers, taps, or other
like tools, are arranged so that either may be easily and quickly moved into or out
of position for use without removal from its spindle or stock, and each tool, when
in operation, is caused to occupy the exact axial line of the main or drill press
spindle, so as to be capable of operating at the precise point upon the work at
which each of the other tools have operated or may operate.
In cases where it is not desirable to make the head a permanent part of a drill
press, but it is desired that it shall be adapted for use upon or in connection with
any ordinary drill press, the spindle A immediately above said head, has a tapering
shank, a', which enables it to be inserted within the lower end of a drill spindle
precisely as in case of an ordinary drill or other tool.
In order to permit of the use of tools having a considerable diameter, back-
gearing may be added to either or all of the spindles, D in which event, each

page_text: spindle, thus provided, is shortened, so as not to project to the upper end of its
bearing C, and is journalled independently, within the same. To the lower pro-
jecting end of said spindle is secured a gear wheel, F, which meshes with and
receives motion from a smaller gear-wheel, G, that is secured upon the lower end
of a shaft, H, which shaft is journalled within the bearing C, parallel with said
spindle. The upper end of said shaft, H carries a gear wheel, I, that meshes with
and is driven by a smaller gear wheel, K, which latter is journalled at the upper
end of said bearing, C, and is engaged by and receives motion from the spring
bar, A¹. As thus arranged, the rotation of the main spindle will through the gear
wheels and shaft, be communicated to the supplemental drill spindle and will cause
the latter to have such relative velocity as may be desired, the same being regulated
by the relative proportions of said gearing.
For use with screw-taps, it may be desirable to have the motion of the supple-
mental spindle reversible, for which purpose, the pinion, K is made too small for
engagement with the wheel I, and upon the axis of the former is pivoted a hook-
shaped bar, L, that has journalled at one side of its pivotal bearing, a pinion M,
and at the opposite side, a pinion N, which mesh with said pinion K, A third
pinion, O, is journalled upon said bar beside said pinion, N, and meshes with the
same.
If now, the bar L is moved in one direction upon its pivotal bearing, the pinion M
will be caused to mesh with the gear wheel I, and transmit to the same, the motion
of the pinion K, while by moving said bar in an opposite direction, the pinion, O
will be engaged with said wheel, I, and the motion of said pinion, K, will be
transmitted thereto through said pinion, O, and the pinion, N, by which means, said
wheel I will be caused to rotate in a direction opposite to that caused by the
engagement therewith of said pinion M.
In applying the mechanism described to drilling machines I do not limit myself
to drill presses proper as it is equally adapted to machines having horizontal
spindles, it being obvious that there is no difference in the principle of operation
whatever the position of such spindle.
In order that the capacity of the mechanism may be still farther increased, any
or all of the tools, E, may be made double as follows, viz:-
The body or stock, E has its upper end adapted to fit into the socket of the drill
spindle D, and at its lower end is forked and provided with a bolt, e, which passes
transversely through the ends of the forks, e¹, and by rotation adapted to vary the
relative lateral positions of said parts..
Pivoted centrally upon the bolt, e, between the forks, el, is a bar, E¹, which at
and at each side of its centre, is adapted to fit upon or within the contiguous faces
of said forks, so that when said bolt is screwed inward to compress the latter, said
bar will be clasped between the same and firmly held in line axially with the
stock.
.
The ends of the bar E¹, are adapted for use in drilling, reaming, counter-boring,
screw-threading, etc, and while they may be duplicates if desired, said ends are pre-
ferably different and one is adapted for use after the other, as for instance, a drill
upon one end, and a screw-tap, counter sink or counter bore upon the other end.
For use in counter-boring a hole, I employ the means shown, in which a vertical
groove, e, is provided within one side at one end of the tool E¹, and within the
same is pivoted a cutter, e³, that when occupying its normal position, as shown in
Fig. 6, is entirely within the lines, radially, of said tool, and does not interfere with
the insertion of the latter within an opening, which is substantially filled thereby.
The cutter, e³, extends below the tool, E¹, and its lower end has a V shape which
corresponds generally to the shape of the end of a drill. The point **, of said
cutter end is, however, at one side of the axis of said tool, so that when pressed
against the bottom of the opening, the lower end of said cutter is forced outward
so as to cause a lip, e5, at the outer edge, to cut into the contiguous side of said
opening, such cutting operation being continued until said point, et, has a bearing

page_text: at the bottom centre of said opening, the result being the production of a counter+
bore or enlargement at the lower end of the latter.
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:-
1. As an improvement in drill presses, a bead or turret which has journalled
therein a number of special drill spindles and is in turn journalled upon an
obliquely arranged arm, that is secured upon and moves vertically with the lower
end of an ordinary drill spindle whereby by the rotation of said head upon its
journal, either of said special drill spindles may be brought into line axially with
said ordinary drill spindle and then caused to engage with and be rotated by the
same, substantially as and for the purpose specified.
-
2. In combination with the spindle, A, the sleeve, B, journalled thereon, and
provided with the radial arm, b, and oblique arm, b¹, the head C, journalled upon
said arm b¹, and the special spindles D, journalled within said head at points equi-
distant from its centre and in lines which are relatively oblique to its axis,
substantially as and for the purpose shown.
3. In combination with the special spindles, D, of the obliquely journalled head, C,
the spring actuated bar, A¹, fitted to and adapted to move longitudinally within
the lower end of the spindle A, and to automatically engage with the upper end d,
of each of said spindles D, substantially as and for the purpose set forth.
4. An improved device for use in drill presses, composed of a forked stock that
is adapted to be secured within and revolve with a drill spindle and a tool which
is pivoted centrally within or between the forks of said stock and at each end is
adapted for use in forming, threading, counter-boring or otherwise operating in
connection with a hole, in combination with means, substantially as shown whereby
said tool may be locked in line axially with said stock substantially as shown and
described.
5. As a means for counter-boring the inner end of a hole, a tool composed of a
bar which is adapted to loosely fill and to be revolved within such hole and is
provided within its lower end, at one side, with a radial, longitudinally arranged
slot, in combination with a flat cutter that is pivoted at or near its upper end
within and is adapted to swing outward from said slot and has its lower projecting
end made V-shaped with its point placed at one side of the axis of said bar,
substantially as and for the purpose specified.
L
100P