Year: 1897

page_text: "
We, JOHN ICELY WARMAN. and CARL WINTER, both of 617 to 621, Austin Avenue,
Chicago, Ill., U.S.A.; Merchants, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to provide a machine for drilling a series of aper-
tures simultaneously, and which will be found especially useful for drilling the holes
in hubs for the spokes of cycle wheels.
The machine comprises a frame consisting of two suitable standards baving a
longitudinally slotted bed resting upon and extending between them. Two head:
stocks are supported upon the bed near each end thereof and have a threaded lug or
nut extending from their lower sides and projecting through the slot in the bed,
where their threaded apertures engage right and left-handed threads, respectively,
formed near the respective ends of a rod arranged beneath and journalled in bearings
so as to lie parallel to the bed.
The head-stocks are provided with fast & loose pulleys upon a spindle journailed
therein. "The front part of each head is formed with a casing or cavity around the
spindle to cover gearing upon it and working in conjunction therewith to rotate a
series of smaller spindles arranged around the spindle and projecting from the face of
the head stock. Each of the smaller spindles is formed with means for holding a
drill.
Between the head-stocks is a suitable vice, resting upon the bed and adapted-to
hold the work, such asia wheel-hub.
In operation, the work having been adjusted in the vice, and the drills set in
motion, the head-stocks are caused to approach it by rotating the screw-threaded rod;
aforementioned, by means of a hand-wheel-thereon.
Dated this 30th day of June 1897.
•
P. R. J. WILLIS,
Agent for Applicants.
C
We, JOHN ICELY WARMAN and CARL WINTER, both of 617 to 621, Austin Avenue,
Chicago, Ill., U.S.A., Merchants, 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 boring machines, and pertains more specifically to

page_text: improvements in multiple drills of that class in which a plurality of drill spindles are
actuated simultaneously from a single circular driving element.
The object of the invention is to provide an improved device of the character
above referred to embracing a novel adjustable thrust bearing for the drill spindles
and a novel arrangement of the parts, whereby the principal operating members are
completely housed and protected from dust and cuttings; together with other
features of improvement, as will hereinafter more fully appear.
The invention consists in the matters hereinafter described, and more particularly
pointed out in the appended claims, and the same will be readily understood, reference
being had to the accompanying drawings, in which :-
Figure 1 is a front elevation of a machine embodying our invention. Fig. 2 is a
top plan view of same. Fig. 3 is a transverse vertical section taken on line 3-3 of
Fig. 1. Figure 4 is a similar view taken on line 4-4 of Fig. 2. Fig. 5 is a side
elevation of one of the drill heads removed from its bearings. Figs. 6 and 7 are
front and rear end elevations, respectively, of the saune. Fig. 8 is an axial sectional
view; and Fig. 9 is a rear end view of the drill head with the end closing member
removed, shewing more particularly the relative arrangement of the gears. Fig. 10
is a side or end view of the clamping jaws.
The invention is shewn herein as embodied in the form of a duplex machine
adapted for boring the two spoke-flanges of a cycle or velocipede or vehicle hub,
simultaneously, for the reception of the spokes, but, as will be obvious-from the
following description, the main features of the invention may be embodied in other
machines for doing drilling of analogous character, the present machine constituting,
but one application of the invention.
First describing the drill head proper, A designates a main driving spindle-or
shaft provided near one end with a gear wheel A¹, mounted rigidly concentrically
thereon, or made integral therewith, and provided with peripheral teeth a.
B designates a housing, bored axially as at b to receive the spindle A, and provided
in one end with an annular cylindrical enlargement or chamber 6' of sufficient
diameter to accomodate the gear A¹ and provide additional space radially outside
said gear.
Through the body of the housing are formed a plurality of drill spindle apertures 6º,
arranged in a series, concentric, and parallel with the shaft A and extending from the
gear-chamber b¹ through to the front end of the drill-head. Within these apertures 6²
are mounted drill spindles provided on their inner ends with pinions c, which are
arranged to intermesh with the periphery of the gear A¹. Said drill spindles C and
the pinions care herein shown as formed integral with the spindles, the latter being
turned down to a diameter somewhat less than the diameter of the pinions and
inserted within their sockets or apertures 62 from the rear end of the housing. The
inuer end of the pinion thus acts as a shoulder which rests in contact with the inner
end wall of the gear-chamber and serves to limit the forward movement of the drill
spindle.
The forming of the pinion integral with the drill spindle is, obviously a mere
incident of construction, and said pinions might be made separate from and secured
upon the drill spindles, if found desirable.
D designates au annular end closure member adapted to close the end of the gear-
chambér b¹, said member D being centrally apertured to fit upon the main shaft A
and' screw threaded at its periphery, as at d, to fit within and engage the correspond-
ingly threaded interior of the end portion of the gear chamber b. The member D
is adapted to be screwed inwards until its inner end rests in contact with the gear A¹
and holds the latter in suitable bearing contact between said inner end of the
inember D and the opposed face 63 of the body of the drill-head; and is held in this
position by any suitable means, that herein shewn consisting of a set screw bt,
inserted through the outer wall of the gear chamber and impinging at its inner end
upon the periphery of the member D.
E, designates thrust bearing screws threaded within suitable apertures d¹ formed

page_text: through the member D in axial alignment with the several drill spindles C, the inner
end of said bearing screws being cone-shaped and arranged to engage correspondingly
shaped recesses c¹ formed in the ends of the respective drill spindles C.
At their outer ends, each of said bearing-screws is provided with a suitable head e,
to which any suitable tool may be applied, to adjust the screw, and check nuts e¹ are
arranged between said heads and the body of the member D, by means of which the
bearing screws may be positively locked from movement after the adjustment.
From the foregoing description it will be obvious that the member D constituted,
as a whole, a bearing ring which receives the thrust of the drill spindles in forcing
the latter to their work.
Drills F may be connected with the several drill spindles C in any suitable or
desired manner, but are herein shewn as simply inserted in suitable rectangular
sockets c, formed in the outer ends of the drill spindles and secured therein' by means
of set screws f.
The drill head constructed as above described may, obviously be mounted upon any
suitable support by means of which the outer housing is secured from rotation while
the main spindle A is suitably driven from any source of power; but in the present
instance two duplicate drill heads are shewn as mounted upon travelling carriages G
which are in turn mounted to slide upon suitable ways H, arranged in alignment
with each other, so that the drill-heads may be caused to approach and recede from
each other in direct lines.
Each carriage G comprises a base g, provided, on its under side, with a
longitudinal dovetail groove gl which engages the correspondingly shaped way H,
and two pillow block standards g, rising from opposite ends of said base and within
the upper ends of which the drill-head is mounted. The standard g is provided in
its upper end with a yoke g', adapted to receive the cylindrical drill head B, and a
strap g³, adapted to embrace the upper side of the drill head and provided with
apertured ends go, arranged to register with corresponding lugs or ears g', through
which are passed bolts 9", by means of which said member B may be clamriped" within
the yoke. In order to provide a positive bearing to prevent endwise movement of
the drill head within the yoke under the working pressure of the drill, said drill
head is provided with a bearing flange be, which engages the inner vertical face go
of the yoke and strap. The other pillow block standard g³ is provided with a
bearing aperture g¹º, adapted to receive the end of the main spindle A. I and I'
designate fast and loose pulleys respectively, mounted upon said main spindle A
between the yoke standards g2 93 and adapted for belt connection with any suitable
counter-shaft. In order that said travelling carriages may be caused to approach
and recede from each other simultaneously, each is provided with an eye lug g",
which depends from the lower side of the base g through a suitable longitudinal slot
or mortise h, formed in the way H, said lugs being internally screw-threaded and
engaged with right and left screw threaded portions; j' of a feed screw J, mounted
in suitable bearings J', so as to extend longitudinally beneath the ways II.
One end of said feed screw J is provided with a suitable hand-wheel J, by means
of which it may be turned to advance or retract the carriages G.
Now, describing the work-holding devices, K designates a standard suitably mounted
upon the ways H centrally between the carriages G, and provided with vertical guide
ways, upon or between which are arranged to slide upper and lower blocks kt.
Cross bars are arranged to extend across the end of said standard K, within which
cross. bars is rotatably mounted a vertically arranged screw shaft L, provided with
right and left screw threaded portions with which said upper and lower sliding
block are operatively engaged. The screw shaft L is prevented from endwise or
vertical movement within its bearings by means of a collur 2 secured thereon and
arranged within suitable recesses ³, formed in the adjacent surfaces of the cross
bars, and engages at its lower end with a step bearing ', formed in the lower part
of the standard K. Each block k¹ carries a clamping jaw k k rigidly mounted
thereon, which jaws are recessed in their proximate faces, as at 7, 8, to receive and

page_text: bold the cylindrical side of a cycle or velocipede for vehicle hub M interposed
between said jaws. The width of the jaws kk may be somewhat less than the
distance between the radial flanges m m of the bicycle hub, so as to permit the drills
to pierce the flanges without coining into contact with the jaws, or, preferably, the
jaws may be made of the same width as the distance between the flanges and provided
in their side faces with annular recesses 3, of slightly less diameter than the exterior
diameter of the hub flanges, within which the points of the drills may enter without
contacting with the said jaws, while at the same time those portions of the side faces
of the jaws radially outside of the said recesses will serve as positive supports for said
flanges during the drilling process.
The operation of the machine above described will be obvious, but may be briefly
described as follows: Assuming the parts to be in position shewn in Fig. 1, the clamping
jaws are first opened by means of the screw 1, so as to permit the insertion of a hub in the
position shewn, and the jaws are thereafter brought into clamping engagement, so as
to hold the hub rigidly from movement, and adjusted centrally between the carriages.
The belts are now shifted to start the drills, and the latter are fed forward by means
of the feed screw until the drills have pierced the respective 'flanges, when the
direction of the feed screw is reversed and the drills retracted, whereupon the hub is
removed from the clamping jaws and the operation repeated.
The machine described is applicable for drilling holes through or into various other
pieces of work, as will be manifest, and the clamping jaws will be adjusted or replaced
by other common forms of clamping devices as occasion may require. It is further
to be noted that a single inovable drill head carrying a plurality of drills may be used
instead of two such heads, and further, that one such head is used it may be fed to
the work, or the work may be fed to the drills, as is done in many well known forms
of drills, simple and multiple, now in common use. We therefore do not desire to
be limited to the precise details of construction shewn, nor to the particular application
of our invention above described since many changes in detail will, naturally occur to
the skilled mechanic and which may be included within. the scope of our invention.
The machine shewn and described is believed, however, to be specially desirable not
only in the general invention, but in the matter of detail.
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 :-
(1) A multiple drill comprising a main driving spindle, a spur gear wheel integral
therewith or mounted thereon, a concentric housing having in one end a cylindrical
chamber inclosing said gear wheel and provided with a plurality of parallel drill
sockets extending from such chamber outward through the other end of said
housing, drill carrying spindles extending through the said sockets, a pinion on the
inner end of each spindle operatively engaged with said gear wheel, a removable end
closure for said chamber provided with adjustable thrust bearings for each of said
spindles, comprising conical-pointed bearing screws passing through apertures-in-said
closure in axial alignment with the drill carrying spindles and engaging conical
recesses in the ends of the latter, substantially as described. .
T
(2) A multiple drill for drilling cycle or vehicle hubs and other articles, comprising
a stationary work holder or support, provided with clamping jaws operated to
advance or recede simultaneously, whereby the work is locked or clamped in axial
alignment and concentric with the drills, a drill head on each side of said holder,
means for simultaneously advancing the drill heads to and from said holder, a
plurality of drills rotatably mounted in each of said heads in circular series and
parallel with each other and means for rotating each set of drills as the latter are
advancing to their work, substantially as described.
(3) A multiple drill, comprising a frame, a stationary support or work holder
thereon provided with oppositely arranged clamping jaws, means for simultaneously
:
:
17.

page_text: moving the jaws together to clamp the work in axial alignment and concentric with
the drills, a carriage movably mounted on said frame on each side of said holder,
means for simultaneously advancing each carriage to and from the work holder, a
drill head comprising a cylindrical housing secured in each of said carriages, a central
rotatable shaft and gear wheel mounted in each housing, a plurality of drill carrying
spindles arranged within each housing in circular series and parallel with each other
and operatively engaged with said gear wheel, and means for rotating each of said
gear wheels as the drill heads are advanced to their work.
(4) In a multiple drill, the combination of a main frame having a work holder
or support, oppositely extending ways arranged parallel with the axis of the work
to be drilled, a travelling carriage mounted in each of said ways, each carriage being
provided with drill heads, comprising a housing, a plurality of parallel extending
drills arranged in circular series a central driving-spindle provided with a gear wheel
which has engagement with each of said drill spindles, means for rotating the central
driving-spindle, clamping-jaws movably mounted upon the work support, and
arranged to be moved simultaneously to and from the work to clamp the same in
alignment with the drills, and means for simultaneously moving both drill carrying
carriages toward and from the work substantially as described.
(5) A machine for drilling the flanges of cycle and vehicle-hubs or other articles
comprising an upright support within which a hub may be supported in horizontal
position, a horizontal way extending parallel with the axis of the hub, a travelling
carriage mounted upon said way and carrying a multiple drill head provided with a
plurality of drills arranged in circular series concentric with the axis of the hub and
parallel with each other, means for driving said drills, and means for advancing and
retracting the drill-heads, coinprising a feed screw having operative engagement with
the travelling carriage, substantially as set forth.
(6) A machine for drilling the flanges of cycle or vehicle hubs, or other articles
comprising an upright support, within which a hub may be supported in horizontal
position, oppositely extending horizontal ways arranged parallel with the axis of the
hub, a travelling carriage mounted upon each of said ways and carrying a multiple
drill head provided with a plurality of drills arranged in a circular series concentric
with the axis of the hub and parallel with each other, means for driving each set of
drills, and means for advancing and retracting the carriages simultaneously com-
prising a feed-screw having right and left screw threaded portions operatively engaged
with the respective carriages substantially as set forth.
(7) In a multiple drill, the combination with a drill head comprising a housing
adapted to rest in any suitable journal and having an interior chamber extending
through one end of said housing, and a plurality of apertures extending from said
interior chamber through the other end of said housing, a plurality of drill carrying
spindles journalled in said apertures, their outer ends being provided with drills and
their inner ends with a pinion each, said pinions being within said chamber, an aper-
tured member removably secured to the housing to close the end of said chamber,
adjustable thrust bearings on said members for each drill-carrying spindle, a central
gear wheel in said chamber in engagement with said pinions, and means for actuating
said
gear wheel substantially as described.
(8) A multiple drill comprising a main frame, a stationary work support on said
frame, means for clamping the work in said support, a travelling carriage on each
side of said support mounted in ways formed on the frame, a drill head in each
carriage, carrying a circular series of drills extending in parallel relation to
each other, and actuated by a common main spindle, and means for simultaneously
moving the carriages toward and from said support, comprising a lug extending
from each carriage through a longitudinal slot in the main frame, apertures in
each lug in alignment with each other, and a right and left screw-threaded shaft
mounted in said apertures, and engaging interior screw threads therein, as
described.
(9) In a multiple drill, the combination with a frame, a travelling carriage on

page_text: said frame, carrying a circular series of parallel extending drills, and means for
moving said carriage on the frame, of a work-support mounted on the frame provided
on its side adjacent to said carriage with an annular recess which is adapted to
receive the drills when the carriage is at the extreme inner limit of its movement.
Dated this 30th day of March 1898.