Year: 1895

page_text: Date of Application, 30th July, 1895-Accepted, 21st Sept.,
1895

page_text: dovetails on the slide-bases toward and from the sides of the machine are slides 3
which have dovetailed mortises that fit the dovetails on the bases. It is desirable
to adjust these slides on the bases sidewise toward and from the center of the
machine very finely, and to accomplish this it is preferred to secure to the edges of
each slide 3 a stop-disk 4 bearing a spindle that has a threaded part turning in
a threaded socket formed in the slide-base. Each of these spindles bears a collar 6
on the inside of the hub of the stop-disk and a stop 7 on the outside, the stop being
keyed to the spindle and having a nut screwed against the outside to hold the stop
on the spindle in place. (Fig. 4.) On the hub of the stop is fastened a graduated
ring 8 that is adapted to register with an index mark on the hub of the stop-disk
for accurately determining the position of the parts. In the stop-disk is formed
a circular T-shaped mortise 9 in which moves a stop-pin 10 which can be clamped
in any desired position by a clamp-nut 11 and set to engage the pin 12 that projects
from the stop 7 so that the stop may be quickly and securely arrested at the proper
position by the contact of the pins when the slides are moved sidewise to the proper
position by the rotating of the adjusting screw. (Figs. 2, 3 and 4.)
The slides 3 have dovetails on their upper faces at right angles to the mortises
in their under faces, and movably supported on these dovetails of the slides are the
upper slides or carriages 13 which, of course, have dovetailed mortises that fit the
slide dovetails. These carriages bear rotary spindles 14 that have threaded parts
turning in threaded sockets in the lower slides for adjusting the carriages toward
and from the front and back of the macbine on the dovetails of the lower slides,
and these spindles bear graduated collars 15 that register with an index mark on
the pointers 16 secured to the carriages to determine the exact adjustment of the
carriages when moved. (Figs. 1, 3 and 4.)
On the top face of each of the upper slides or carriages 13 is a pair of flanges 17,
pivotally supported between which by a bolt 18 is a swinging head 19. The
pivotal bolt 18 is preferably passed from one flange to the other through the
swinging head near one end and held in place by a nut, while a bolt 20 is passed
through the swinging head near the other end and through slots 21 formed in the
walls of the flanges, so that when the nut which is provided for the bolt 20 is
loosened the swinging head may be oscillated vertically on the pivotal bolt 18.
This hanging of these swinging heads allows an inclination of the axes of the cutter
spindles which they bear, so that the faces of the cutters may be inclined at the
proper angle to the axis of the drill blank it is to relieve. (Figs. 3 and 4.)
Supported in bearings in these swinging heads are the cutter-spindles 22 to
which are fastened in any desirable manner the driving pulleys 23. It is preferred
to fit the pulleys on sleeves 24 that are borne by the spindles and connect the
pulleys with the spindles by means of pulley-drivers 25 that are keyed to the
spindles and held in place by set nuts 26. To the inner ends of these cutter-
spindles are secured the shanks of the ordinary milling cutters 27 which are used
to clear the body of the drill blank. Oil guards 28 may be placed on the ends of
the spindles adjacent to the cutters if it is desired to direct into the oil catch-
well 31 the lubricating material applied to the face of the cutters. (Fig. 4.)
By means of this arrangement the cutter-spindles can be oscillated and then set
so that the faces of the cutters will have any proper angle of inclination with
relation to the axis of the drill to cut away the land of the drill back of the groove
in the most desirable manner, and these cutters can be instantly adjusted toward or
from the front or back of the machine by the movement of the upper slides or
carriages, or they may be moved toward and from the sides of the machine, to
or from the drill-blank, by the movement of the lower slides so that they may be
located to properly operate on drill blanks of any diameter, or may be moved away
while a blank is being placed in the drill-guide and connected with the feed before
being operated upon.
•
Supported on the top of the base between the slide-bases is a frame consisting of
a pair of standards 29 joined at the top by a cross-head 30 and at the bottom by a
curved hollow part 31 that provides an oil catch-well and also a support for the

page_text: drill-guide. (Figs. 3 and 4.) Held by this curved connecting part of the frame
is a bushing 32, which bushing supports the drill-guide 33. This drill-guide,
which may be changed for varying sizes of drills, is a tube with an opening
approximating the diameter of the drill to be cleared, an projecting inward from
this tube near the upper end are pins 34 that are adapted to extend into and, by
contact with the edges of the groove of the drill to be cleared, cause the drill to
rotate according to the pitch of the groove so that its land will be correctly
presented to the cutters when it is being fed through the machine. (Figs. 3, 4,
13 and 14.)
Rotarily held in an opening in the cross-head 30 at the top of the frame is an
interiorly threaded feed-nut 35, on which is a worm-gear 36 and a bevel-gear 37.
The feed-nut is preferably held in place in the opening by means of the clamping
and set nuts 38 and 39 that bear against the top, and one face of the worm-gear 36
that bears against the bottom of the cross-head. (Figs. 6 and 7.) Turning in the
interior thread of the feed-nut 35 is a threaded drill-spindle-sleeve 40 in which is
located the drill-spindle 41. The lower end of this drill-spindle, which turns
loosely in the sleeve, is provided with a chuck 42 for grasping the shanks of the
drills to be cleared, while on the upper end is a friction-ring 43 that is keyed to
the spindle and held in place by a nut 44. The under side of this ring is grooved
and rests on anti-friction balls that run in a groove in a friction-arm-base 45 that
is keyed to the upper end of the spindle-sleeve 40. (Figs. 6 and 7.) To this
friction-arm-base 45 are pivoted friction-arms 46 that are forced apart at the rear
by a spring 47, the tension of which is adjusted by a nut 48, so that the arms bear
with a yielding pressure against the edge of the friction-ring 43 on the end of
the spindle. Pivoted to the friction-arm-base 45 is a relieving lever 49 that
engages the forward ends of the friction-arms and opens them or allows them
to close against the friction-ring, according to the position of the lever. (Figs. 6
and 12.)
The spindle that holds the drill is held loosely by the drill spindle sleeve for the
drill is rotated as it is fed down by the guide pins projecting into its grooves, and
the rotation of the drill turns the drill spindle which supports it. With very small
drills, which this machine will clear, the drill spindle must turn very easily and
must not bind or the little drill would be twisted and broken, so the anti-friction
balls are provided to reduce the friction as much as possible. When large drills
are being cleared on the same machine the friction on the end of the drill spindle
must be greatly increased or, at a certain time, the larger cutters which would
have to be used would so bite the metal of the drill they were clearing as to turn
it around against the friction and cut into the drill as it was being fed along where it
should not, and thus ruin the drill. To provide for this the friction arms are made
by the movement of the hand lever to grasp the friction ring on the end of the
drill spindle and hold it with a sufficiently firm grasp.
Screwed on the spindle-sleeve beneath the friction-arm-base is a stop collar 50
that can be adjusted so as to make contact with the end of a set-screw 51 that is
screwed into the spline-bracket 52. This spline-bracket is secured to the top of
the frame and has an edge that projects into a groove that is formed along one side
of the threaded-spindle-sleeve so that this sleeve will not rotate when it is being
fed up or down. (Figs. 5 and 7.)
With this mechanism, when the bevel-gear or the worm-gear is rotated, the
threaded-spindle-sleeve is fed up or down without rotating, by the rotation of the
feed-nut to which the worm-gear and bevel-gear are secured. This movement of
the spindle-sleeve carries with it the drill-spindle with any drill that is held in the
clutch on the end of the spindle. As the drill is fed by the movement of the
spindle it is rotated by means of the pins that project into the grooves of the blank
from the sides of the drill-guide, and as the drill-spindle is mounted on the balls at
the top, this rotation is such that the drill will present the proper part of the land
back of the cutting edge at the desired time for the milling cutters to cut away
the correct amount to properly clear the body of the drill-blank. The drill spindle

page_text: is hung loosely and the drill rotated by the contact of the pins with the edges of
the grooves, so it makes no difference what is the pitch or whether it is regular or
increasing; the drill is rotated according to the pitch of its grooves in engagement
with the pins, and thus the right portion of the land back of the cutting edge is
always presented to the cutters, which are inclined to the axis of the drill-blank
for milling the relief.
Secured to the frame near the top is a bracket 53 having a hub 54 that supports
a shaft 55, on one end of which is a hand-wheel 56, while on the other end the
shaft has a bevel-gear 57 that meshes with the bevel-gear 37 on the feed-nut 35.
(Figs. 6 and 11.) "When the hand-wheel is rotated the meshing gears rotate the
feed-nut and cause it to feed the spindle up or down, according to the direction of
rotation of the hand-wheel.
Loosely supported by this bracket 53 is a swivel-box 58, the box being pivotally
held at one side of the bracket by a stud 59 that passes through a perforation the
size of the stud, and at the other side by a stud 60 that passes through a slot 61.
(Figs. 5 and 11.) In a socket in one end of this swivel box is a plunger 62 that
is forced by a spring 63 against one of the standards 29 of the frame to normally
thrust the box so that it will swing on its pivot out away from the frame. (Figs. 9
and 10.) And on one side of the bracket 53 is secured a reciprocating-slide 64
that is normally forced upward by a spring 65, so that its end will engage a portion
of the swivel box and hold it up to the frame against the thrust of the spring-
plunger. (Figs. 8 and 9.)
This catch-slide 64 is connected with a lever 66 having a handle so that the
slide may
be disengaged by hand from the swivel-box to allow the latter to swing
out, and this lever 66 also has a hooked end 67 in the path of a trip-block 68 that
is adjustably held by a set-screw to a rod 69 connected to and vertically movable
with the friction-arm-base 45 on the upper end of the threaded-spindle-sleeve 40.
When the spindle-sleeve with a drill-blank has been fed upward the desired
distance, the block 68 engages the end of the lever 66, and its further upward
movement oscillates the lever so as to pull the slide and release the catch and allow
the swivel-box to be thrust out away from the frame by its swinging plunger.
(Figs. 5, 8 and 9.)
The swivel-box bears a shaft 70 on which is a worm 71 that is adapted to mesh
with the worm-gear 36 on the feed nut 35 when the swivel-box is swung up to the
frame, but does not mesh with the worm-gear when the swivel-box is swung away
from the frame. (Figs. 2 and 10.) The shaft 70 bears on its end a gear 72 (Fig. 5)
that can be readily changed, if desired, to vary the speed of the feed according to
the shape of the drill that is to be cleared. This gear 72 meshes with an inter-
mediate gear 73 that is borne by an arm 74 adjustably held by a bolt passing
through a slot in a part of the swivel-box, and this intermediate gear meshes with
a gear 75 on a sleeve to which is secured the feed-driving-pulley 76. A handle 77
is provided for pushing the swivel-box back against the thrust of its spring-
plunger so that the catch-slide will hold it with the worm and worm-gear in
mesh.
In operating the machine, the cutters are first moved away from the center
toward the sides by moving the slides on the slide-bases. Then, after the drill-
blank has been placed in the drill-guide and grasped by the chuck on the end of
the drill-spindle, the cutters are correctly adjusted by moving up the different
slides to the proper position, and power is applied to the cutter spindle-pulleys, the
angle of clearance to be given to the drill-blank-body being previously determined,
and the swinging heads with the cutter-spindles having been set so that the faces
of the cutters will lie in a plane at the proper angle for making the desired cut on
the drill-blank. When a blank and the cutters are in position, power is applied
to the driving pulley held by the swivel-box and this, through the medium of the
gears, rotates the worm and worm-gear so as to cause the spindle-sleeve on the
spindle to be fed upward and draw the drill blank between the cutters. As before
stated, the drill-spindle being loosely held in the sleeve, the drill is rotated as it is

page_text: drawn upward by the pins of the drill-guide according to the pitch of the groove,
When the drill
so that the proper portion of the land is presented to the cutters.
spindle and drill have been drawn up as far as desired, the trip-biock strikes and
moves the trip-lever so that the slide disengaged from and releases the swivel-
box which then, under the impulse of the spring plunger, is thrust away from the
frame. This, of course, unmeshes the worm and worm-gear and stops the feeding
of the spindle and drill. The drill spindle may be fed down by the hand-wheel
when the worm and worm-gear are disengaged and it is desired to commence again
on another blank. When the fresh blank is in readiness and the cutters are moved
up, the swivel-box may be pushed up to the frame by means of the handle so the
rotating-worm will mesh with and again rotate the worm-gear for feeding up
between the cutters the blank that has just been placed in position.
Drill blanks of any common diameter and of any regular or increased pitch can
be quickly placed in position in this machine and milied on any desired angle to
have the most effective clearance back of the cutting edge, for the slides can be
readily adjusted horizontally toward and from the front or back and toward or
from the sides of the machine according to the size of the drill blank to be cleared,
and the cutter-spindles are readily oscillated and adjusted so that the faces of the
cutters will incline at any desired angle with relation to the axis of the blanks
which are rotated as they are fed through the machine by their own pitch. The
entters used in this machine are simple and cheap. They have straight cutting
edges and do not have to be ground où an angle, and when the machine is once set
any number of drill blanks of a size can be subjected to the body clearing operation
of this machine and come through exactly alike, the adjusting mechanism for
the slides permitting a very fine and quick setting of the parts in the desired
position.
Having now particularly described & ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondent, & in what manner
the same is to be performed, I declare that what I claim is :-
1. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, face cutters with their axes extending in
planes substantially at right angles to the plane of the axis of the drill feed, and
mechanism for rotating the cutters, substantially as specified.
2. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, cutters with their cutting faces revolving
in planes substantially parallel with the plane of the axis of the drill feed, and
mechanism for rotating the cutters, substantially as specified.
3. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, rotary face cutters with their cutting faces
revolving in planes substantially parallel with the axis of the drill feed and
supported in bearings that can be oscillated, and mechanism for rotating the
cutters, substantially as specified.
drill feed,
4. In a twist drill body clearing machine, in combination, a
mechanism for operating the drill feed, rotary face cutters with their axes out of
line with the center of the drill or axis of the drill feed supported in bearings that
can be oscillated and are held by slides movable at right angles to the axes of
the cutters, and mechanism for rotating the cutters, substantially as specified.
5. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, rotary face cutters with their axes out of
line with the center of the drill or axis of the drill feed supported in bearings that
can be oscillated and are held by slides movable parallel with the plane of the
axes of the cutters, and mechanism for rotating the cutters, substantially as
specified.
6. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, rotary face cutters supported in bearings
that can be oscillated and are held by slides adjustable at right angles to and alsó

page_text: parallel with the plane of the axes of the cutters, and mechanism for rotating the
cutters, substantially as specified.
7. lu a twist drill body clearing machine, in combination, a drill feed.
mechanism for operating the drill feed, rotary face cutters with their cutting
faces revolving in planes substantially parallel with the axis of the drill feed and
with their axes inclined at an angle with the line of movement of the axis of the
drill feed, said cutters being movable at right angles to their axes, and mechanism
for rotating the cutters, substantially as specified.
8. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, rotary face cutters with their cutting faces
revolving in planes substantially parallel with the axis of the drill feed, and with
their axes at an angle with the line of movement of the axis of the drill feed, said
cutters being movable parallel with the plane of their axes, and mechanism for
rotating the cutters, substantially as specified.
9. In a
twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, rotary face cutters with their axes at an
angle with the line of movement of the axis of the drill feed, said cutters being
adjustable at right angles to and parallel with the plane of their axes, and
mechanism for rotating the cutters, substantially as specified.
10. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, slides movable toward and from the front
and back of the machine, oscillating heads borne by the slides, rotary spindles
borne by the oscillating heads, and face cutters with their cutting faces revolving
in planes substantially parallel with the axis of the drill feed mounted on the
spindles, substantially as specified.
11. In combination with the drill feed of a twist drill body clearing machine, a
rotary spindle bearing a face cutter with its axis extending in a plane substantially
at right angles with the plane of the line of movement of the axis of the drill feed
but said axis of the cutter being out of line with the axis of the drill feed,
substantially as specified.
12. In a twist drill body clearing machine, in combination, a drill feed, mechanism
for operating the drill feed, face cutters with their axes out of line with the line of
movement of the axis of the drill feed, and mechanism for rotating the cutters,
substantially as specified.
13. In combination with the drill feed of a twist drill body clearing machine, a
rotary spindle bearing a face cutter with teeth on one face which rotate in a
plane substantially parallel with the plane of the line of movement of the axis of
the drill feed the axis of the cutter being out of line with the axis of the drill feed,
substantially as specified.
14. In a twist drill body clearing machine, in combination, a drill feed,
mechanism for operating the drill feed, rotary cutters adjustable toward and from
the line of movement of the drill feed, and a tubular guide supported by the
machine in line with the drill feed, said drill guide having cutter openings
through its side walls and drill supporting walls above and below the cutter
openings with pins projecting through the walls into the interior of the guide,
substantially as specified.
15. In a twist drill body clearing machine, in combination, rotary face cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, and mechanism for feeding the sleeve, substantially as specified.
16. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, a friction device connecting the sleeve and the spindle, and
mechanism for feeding the sleeve, substantially as specified.
17. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a rotary feed nut, mechanism for rotating the
nut, a sleeve longitudinally fed by the nut, and a drill spindle loosely carried by the
sleeve, substantially as specified.

page_text: 18. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, power mechanism for feeding the sleeve, and hand mechanism for
feeding the sleeve, substantially as specified.
19. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, and mechanism borne by a movable support for feeding the sleeve,
substantially as specified.
20. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, and mechanism borne by a pivoted support for feeding the sleeve,
substantially as specified.
21. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, hand mechanism secured to the frame for feeding the sleeve, and
power mechanism borne by a support movably secured to the frame for feeding the
sleeve, substantially as specified.
22. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, mechanism borne by a movable support for feeding the sleeve, a
catch for engaging or disengaging the movable support, and a spring for throwing
the support when it is disengaged from the catch, substantially as specified.
23. In a twist drill body clearing machine, in combination, rotary cutters,.
mechanism for rotating the cutters, a longitudinally feeding sleeve loosely carrying
a drill spindle, mechanism borne by a movable support for feeding the sleeve, a
catch for engaging or disengaging the support, a spring for moving the support
when it is disengaged from the catch, aa tripping device connected with the
feeding sleeve and adapted to engage a pa of the catch for tripping the same,.
substantially as specified.
in
combination, rotary cutters,
two gears, power mechanism
hanism for driving the nut
spindle, reciprocated by
24. In a twist drill body clearing machi.
mechanism for rotating the cutters, a rotary nut b
for driving the nut through one gear and hana
through the other gear, and a sleeve bearing a loos
the movement of the nut, substantially as specified.
25. In a twist drill body clearing machine, in c bination, rotary cutters,
mechanism for rotating the cutters, a rotary feed nut tring bevel and worm
gears, a bevel gear connected with a hand wheel mesh with the bevel gear.
carried by the feed nut, a power rotated worm meshing with the worin gear for
rotating the feed nut by power, and a sleeve bearing a loose drill spindle, reciprocated
by the movement of the nut, substantially as specified.
26. In a twist drill body clearing machine, in combination, rotary cutters,.
mechanism for rotating the cutters, a rotary feed nut bearing a sleeve with a
loose drill spindle and having a bevel gear engaging a bevel gear connected
with the hand wheel, and bearing a worm gear engaging a worm borne by a movable
head, mechanism for rotating the worm, and a movable head attached to the frame,
substantially as specified.
27. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a rotary feed nut bearing a sleeve with a loose
drill spindle and having a bevel gear that engages a bevel gear connected with a
hand wheel, and bearing a worm gear that engages a worm borne by a movable
head, adjustable mechanism for rotating the worm, and a movable head attached
to the frame, substantially as specified.
28. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a feed nut loosely supported by the frame, said
nut bearing a worm gear and a bevel gear, a bevel gear supported by the frame
meshing with the bevel gear on the nut and connected with a hand wheel for
rotating the same, a worm borne by a movable head and engaging the worm wheel.

page_text: on the nut, a gear connected with the worm shaft and meshing with a gear borne
by an adjustable arm, said latter gear meshing with a gear connected with the
driving pulley, a longitudinally threaded sleeve borne by the feed nut, and a drill
spindle loosely carried by the sleeve, substantially as specified.
29. In a twist drill body clearing machine, in combination, rotary cutters,
mechanism for rotating the cutters, a feed nut loosely supported by the frame, said
nut bearing a worm gear and a bevel gear, a bevel gear supported by the frame
meshing with a bevel gear on the nut and connected with a hand wheel for rotating
the same, a worm borne by a movable head and engaging the worm wheel on the
nut, a gear connected with the worm shaft and meshing with a gear borne by an
adjustable arm, said latter gear meshing with a gear connected with the driving
pulley, a longitudinally threaded sleeve borne by the feed nut, a drill spindle
loosely carried by the sleeve, and a friction device connecting the spindle with
the sleeve, substantially as specified.
Dated thin 20th day of Iul 1905
BOULT & WADE,
Agents for the Applicant.