Improvements in Machines for Making Twist-drills.
Year: 1895

page_text: Date of Application, 25th June, 1895-Accepted, 15th Feb., 1896
COMPLETE SPECIFICATION.
Improvements in Machines for Making Twist-drills.
1, MOSES CARLYLE JOHNSON, of Number 19 Congress Street, in the City of
Hartford, County of Hartford, and State of Connecticut, United States of America,
Mechanical Engineer, 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 :-
The object of my invention is to provide a machine by means of which an
improved twist drill may be manufactured, the machine combining means for
producing a twist drill with a groove of any desired pitch and depth and consequent
thickness of the web.
To this end my invention consists in the details of the several parts making up
the machine as a whole and in the combination of such parts as more particularly
hereinafter described and pointed out in the claims.
Referring to the accompanying drawings:
Figure 1 is a plan view of my improved milling machine.
Figure 2 is a rear view of my improved milling machine with the pulley and cone
shafts cut in section immediately back of their rear bearings.
Figure 3 is a view in side elevation looking from the right of Fig. 1, with change
gear yoke removed and gears indicated by dotted outline.
Figure 4 is a view in side elevation looking from the left of Fig. 1.
Figure 5 is a view in front elevation of the machine.
Figure 6 is a view in vertical section of the machine on a plane lengthwise of and
through the axes of the drill spindle and feed shaft.
Figure 7 is a detail top or plan view of a part of the table and of the drill slide
saddle and part of its operating mechanism, with part broken away.
Figure 8 (Sheet 2) is a detail top view of the drill guide slide and bottom view
of the drill guide base, the faces shown being adapted to engage each other, scale
enlarged.
Figure 9 is a detail top or plan view with parts broken away showing a portion of
the top of the table, the drill slide saddle, the cutter head slides and the head taper
slide and their method of engagement.
Figure 10 is a detail view of the cutter head slide knee, the cutter head slides,.
and in section of the head taper slide cut through the groove in the latter and
looking toward the cutter bead slides, on enlarged scale.
Figure 11 is a detail edge view of the head taper slide showing its engagement
with the cutter head slides, scale enlarged.
Figure 12 is a detail edge view of the head taper slide looking from the cutter
head slides, scale enlarged.
Figure 13 is a detail view in crosswise section through the drill guide box and the
drill guide mechanism borne therein, scale enlarged.
Figure 14 is a detail view in lengthwise section through the same, scale
enlarged.
Figure 15 is a detail view on enlarged scale, in central vertical section through
the drill holding spindle.
Figure 16 is a detail view, on enlarged scale, of the feed trip device, with parts
broken away to show construction.
Figure 17 is a detail view in lengthwise section through the spring case
ppurtenant to the clutch mechanism for controlling the movement of the saddie
winging devices.

page_text: Figure 18 is a detail view in lengthwise section through the forward end of
the chuck body showing the jaws and the manner in which they are attached to the
spindle and plunger, said view being taken on a different plane from the plane of
section of Fig. 15.
•
Figure 19 is a detail view in cross section through the chuck jaws on a plane
passing through the enlarged end.
In the accompanying drawings the letter A denotes a table or support on which
the machine as a whole is mounted. An opening A' is made through this table near
the front and at one side thereof, the hub B' of the drill slide saddle B resting
on the table adjacent to this opening A'. A hole is made centrally through this
hub B into which is inserted, as shown, the saddle pivot b, the lower end of which
is threaded and bears a washer and nut 61, 62, that hold the pivot securely in place
on the table. A saddle worm segment A² is secured to one side of the table, the
segment projecting upward and outward therefrom. To the rear side of the table
are secured the cone shaft bearing A³ and pulley shaft bearing A. Each of thes
bearings is of considerable width and in the bearing A³ is borne the cone shaft a
to which is secured the small feed cone pulley a', a sleeve a integral with
the small feed cone pulley a¹ extending through the bearing A³ and having secured
thereto the collar a³ to prevent the pulley from moving endwise. The cone shaft a
has a lengthwise groovea in which is borne a spline engaging with the small feed conc
pulley a, this construction allowing the feed cone shaft a free lengthwise movement
within the pulley, but compelling the rotation of the shaft and pulley together; the
pulley is held against lengthwise movement. Within the bearing A* is supported
the pulley shaft as to which is secured the large cone pulley a and the driving
pulley a. The driving pulley a' may be rotated from any source of power and the
rotation of the pulley shaft is communicated to the small feed cone shaft by means
of the belt a8.
CUTTER SPINDLE DRIVING MECHANISM.
The cutter head slide knee C is secured to the table A as by means of bolts or
screws passing through flanges at the bottom, the central portion of this knee
being hollowed out, as shown in Fig. 9, for purposes of lightness. On one side of
the knee is formed a dovetail projection C and borne on this dovetail projection
is the intermediate slide c having a dovetail groove fitting the projection C¹ on one
side and on the opposite side a dovetail groove fitting the dovetail projection on
the cutter head slide c. The cutter head c is adjustably secured to the cutter
head slide c¹ by means of bolts passing through slots in the former. The cutter
head slide c¹ is adjustable vertically upon the intermediate slide by means of an
intermeshing feed screw e³ on the one part engaging a threaded nut on the
opposite part, the outer end of this feed screw being of an angular shape to
receive a wrench or a handle as a means of turning it. The cutter head c² is
adjustable horizontally on the cutter head slide by means of a feed screw con
the one part fitting a threaded nut on the opposite part and this feed screw may be
provided with a handle c as a means of turning the latter, the bolts passing through
the slots in the cutter head and into the cutter head slide clamping the former in
place when the desired adjustment has been attained.
Projections are formed on the cutter head and in these projections bearings
for the cutter spindle dare formed, this cutter spindle being mounted in the
bearings in any manner desired and bearing on its inner end a cutter suitably
secured thereto. To the other end of the spindle is secured one end of a universal
ball joint d', the opposite end of this joint being secured to the joint shaft. socket d
and splined within this socket and rotating therewith, but having a free longitudinal
movement therein, is the joint shaft 3, to the opposite end of which is secured one
end of another universal ball joint similar to the one just described, the opposite end
of this ball joint being secured to the pulley shaft a' by means of which, through
the above described mechanism, rotary movement is imparted to the cutter borne on
the cutter spindle d.

page_text: By means of this mechanism a vertical movement of the cutter spindle through
the medium of the slides may be had and the slides may be adjusted as desired
one upon the other, the universal ball joints, and the longitudinal movement
of one portion of the shaft within another permitting any desired degree of this
adjustment.
DRILL BLANK FEEDING MECHANISM.
The drill blank feeding mechanism is constructed as follows:-
To one end of the cone shaft a is secured by means of a universal ball joint one
member a of the cone shaft a, the opposite end of this member a being secured
by means of a universal ball joint to the feed worm shaft e bearing a feed worm el
in mesh with the feed worm gear f. The feed worm shaft 2 is mounted in bearings
in the feed swivel box et that is pivoted at one end to a downward projection 6* near
one end of the drill slide saddle B and preferably integral therewith. In the
opposite end of this downward projection a slot 6 is formed through which a bolt es
from the feed swivel box extends, this bolt and slot allowing the feed swivel box to
have a vertical movement.
The feed worm e' is in mesh with a feed worm gear secured to one end of and
preferably integral with the feed screw f'. This feed screw is secured to the feed
shaft one end of which has a bearing in a downward projection 63 from the
underside of the saddle B, a nut f³ fitting a threaded portion on the feed shaft and
resting against one end of the feed screw and holding it against lengthwise move-
ment toward the projection 63. A flanged sleeve is borne on the feed shaft f2
one end resting against the feed worm gear fand preventing end wise movement in
this direction, the inner end of this flanged sleeve being borne in the boly of the
drill slide saddle B. A change gear yoke to be hereinafter described is pivoted on
the flanged part of this sleeve, and secured to the feed shaft and resting against
the flange and change gear yoke is a gear f³.
Mounted on the feed shaft
outside of this gear is a sleeve f and also mounted on the shaft and resting
against this sleeve is a handle that is held in place by means of the nut f
secured to the outer threaded end of the feed shaft.
Upward projecting flanges & preferably integral with the body of the drill slide
saddle are formed on each side of the latter, the space between these flanges
affording a slide way for the drill slide which is borne therein, and on these
flanges are secured the drill slide straps 7, the straps extending beyond the edge
of the flanges and over projecting feet D' on the drill slide D, the latter being held
against removal by means of the mechanism described. On the underside of the
drill slide D and in mesh with the feed screw f¹ is secured a feed screw nut D²
The mechanism above described provides for the feeding movement of the drill
slide and a drill blank borne thereon lengthwise of the cutter, the forward move-
ment of this drill slide being given by the mechanism described, the handle f
being used for a quick return of the slide.
SADDLE SWINGING MECHANISM.
A change gear yoke g is pivoted on the flanged part of the sleeve foue end
of the yoke containing a slot g' through which passes a bolt g² fitting a screw
threaded opening in the lateral projection 3 near one end of the drill slide saddle B.
The opposite end of this change gear yoke has a lengthwise slot g within which is
adjustably secured the change gear stud g bearing a double change gear . The
double change gear consists of a small gear in mesh with the gear f³ secured to
the feed shaft and a larger gear in mesh with the pinion secured to the bevel
gear shaft h. The stud y' is inade adjustable in the yoke g for the purpose of
allowing different sizes of gears to be interposed between the feed shaft and the
pinion for varying the speed of parts of the mechanism.
The bevel gear shaft h is mounted at each end in bearings B2 secured to the drill
slide saddle B and centrally in the bearings D³ secured to the drill slide D..

page_text: A lengthwise groove 2 is formed in the bevel gear shaft hand to this shaft near
one end is secured the shaft clutch 73 having an annular groove h* and projections h³.
Pivoted on the stud i secured to the drill guide box to be hereafter described is an
L-shaped shaft clutch yoke i¹, one member of which is forked and rests on each
side in the annular groove in the shaft clutch ³. Screws ³ project through each
fork and on the inner ends are secured shoes resting in the annular groove h* in the
clutch. This shaft clutch ³ is splined to the bevel gear shaft hand has a limited
longitudinal movement thereon. The worm 8 is secured to the outer end of the
bevel gear shaft h, a sleeve on this worm extending through the bearings B and
projecting beyond the opposite edge of the said bearing, and to this end of the
sleeve is secured the shaft clutch disk h' having projections h³ adapted to engage
the projections h³ on the shaft clutch 3. This construction enables the worm
gear to be thrown into or out of engagement with the bevel gear shaft h by the
inovement of the shaft clutch yoke i
The saddle worm is mounted in the bearings B³ located in downward projec-
tions from the under side of the drill slide saddle B and to one end of this worm
shaft and in mesh with the worm he is a worm gear 10 through the medium of
which rotary movement is communicated from the bevel gear shaft to the worm h³.
This worm his in mesh with the saddle worm segment A² secured to the table.
By the rotation of the worm h through the medium of the bevel gear shaft ha
It is to
swinging movement is imparted to the drill slide saddle B on the pivot b.
be noted that the center of this pivot is located directly under and in line with the
diameter of the cutter secured to the cutter spindle d.
A spring case is secured to the bevel gear shaft h, as by means of the screw j³,
a shoulder being formed within this case and one end of a spiral spring j³ rests on
this shoulder, the opposite end of said spring thrusting against the plunger that
in turn thrusts against the shaft clutch ³ tending to normally keep these clutch
parts in engagement. A knock off rod k is supported at one end in the bearing D³
and at its opposite end in the drill guide box and to this rod is secured the clutch
knock-off by means of a binding screw k². This knock-off k has on its lower
edge a projection and a beveled under surface and to the projection ka is
pivoted the knock-off latch . The upper ends of this knock-off latch are beveled
in opposite directions lengthwise of the movement of the rod k on the drill slide
carriage, and the upper end of this latch is so located as to come in contact with
the under side of a pin in the arm of the shaft clutch yoke ', throwing the
arm upward and consequently the clutch parts out of engagement. This mechanism
provides an automatic device whereby the clutch parts are thrown out of engage-
ment and the swinging movement of the carriage stopped, the clutch knock-off k¹
being adjustably secured to the rod k so that this disengagement of the clutch parts
is ensured at any predetermined time.
DRILL BLANK HOLDING AND ROTATING MECHANISM.
A bevel gear is splined to the bevel gear shaft in such manner as to turn
therewith but to have a longitudinal movement thereon, and a sleeve secured to
this bevel gear 7 extends completely through the bearings D³ projecting on the
opposite side and on this end of the sleeve is secured, by means of engaging
screw threaded parts, the nut 12, this nut resting against a shoulder on the sleeve in
such manner as to prevent any binding of the nut upon the bearing D³. The
bevel gear is in mesh with a bevel gear secured to the twist worm . This
twist worm is borne in suitable bearings in the drill slide D and is in engagement
with the worm gear loosely mounted on the drill spindle m.
The drill spindle mis mounted in bearings D, De, on the drill slide D. This
spindle is tubular and located therein and extending therethrough is the chuck
plunger n. This plunger n is keyed to the chuck body m¹ and contains at one end
the slots n¹, the inner ends of which are enlarged as at n². The chuck jaws n³ are
constructed of a form to fit these slots and having an enlarged end fitting the

page_text: enlarged opening n.
These jaws are inserted in the plunger radially thereof and
this construction of the openings n', n³, permits only a radial movement of the
jaws. A chuck body m¹ is secured on the screw threaded end of the drill spindle,
the chuck plunger n extending into this chuck body m'. This chuck body is also
provided with radial slots m² which register with the slots n' in the plunger, the
chuck jaws n extending through the walls of the chuck body to the outer surface
thereof. The chuck cap m³ is secured to the threaded portion of the chuck body m²,
the inner surface of the outer end of the cap being beveled to fit the beveled edges
of the chuck jaws. This construction gives to the chuck jaws a radial movement
as the cap m³ is moved lengthwise on the chuck body or as the chuck plunger is
moved longitudinally within the spindle, the construction affording means whereby
a drill blank may he securely held between the jaws.
A drill spindle clutch o is splined to the drill spindle m, has a limited sliding
movement thereon, and rotates with it. An annular groove o¹ is formed in the
drill spindle clutch and in this groove and on diametrically opposite sides thereof
rests the forked ends of the indexing handle o2. This handle is pivoted in the
clutch yoke o³ that is clamped to the clutch yoke bushing m* as by means of the
screw o. In a socket in this clutch yoke is mounted a plunger o' that is normally
thrust against the indexing handle by means of the spring of that is located in the
chamber of with one end thrusting against the plug 8 and the other against a
shoulder on the plunger. This plug of has a central hole therein through which
projects one end of the plunger. Clutch pins are secured in the worm gear 15
and are adapted to engage recesses o in the drill spindle clutch o, these recesses o°
being located to correctly register with the pins, each of the pins engaging the
recesses at the same time. In the opposite side of the drill spindle clutch o is.
located a pin 10 that is adapted to engage the recess o" in the clutch yoke o³.
The pins and 10 are constructed of such a length that one will engage its recess
at the same time or a little later than the time that the other is leaving its recess.
This construction enables the drill spindle to be thrown into or out of engage-
ment at will with the worm gear 15.
The bushing m is mounted on the drill spindle m and is held against rotation by
means of the pins m³, and on this bushing is rotarily mounted the hand wheel
which is held in place by means of the nut p' fitting the outer threaded end of the
bushing. The chuck hand wheel nut p² is secured to the hand wheel by means of
the screw p³. This nut has a central opening which is screw threaded, and the
screw threaded end of the chuck plunger à fits the screw threaded opening so that
when the nut p² is turned as by means of the hand wheel p a longitudinal movement
of the chuck plunger is caused, and this is used for the purpose of clamping a drill
blank between the chuck jaws n³, the chuck cap m³ being tightly secured to the
chuck body m'.
TAPER SLIDE MECHANISM.
A socket d Figures 6 and is formed in the drill slide D and is covered by a
plate d³ that is secured as by means of screws to the upper surface of the drill slide.
A taper slide stud de is secured to the drill slide as by means of interengaging
screw threaded parts, and rotarily mounted on the upper end of this stud is a stud
bushing that is angular in form in cross section and is located in the slot g² in
the taper slide q. This taper slide q is located in the recess d* in the drill slide
and the construction just described enables the taper slide to have a sliding
movement laterally of the drill slide and at the same time a rotary movement on
the stud d. A groove q³ is located in the upper surface of this taper slide, the
groove being deeper at the right hand end (Figure 9) than at the left hand end,
that is, it slants downward from the left to the right as seen in said figure, and the
upper surface of the projection q located between this groove and its nearest edge
is parallel to the bottom of the groove, that is, it is also inclined from left to right.
The edge of this taper slide q projects into a groove c' formed in the projection c
on the intermediate slide c. A taper slide strap is secured to the upper one

page_text: of the projections 8, the lower edge of the strap projecting into the groove 7³.
This construction necessitates an upward movement of the intermediate slide c
and consequently of the cutter spindle d and the cutter located thereon, as the
drill slide is moved toward the right (Figs. 5, 6 and 9 of the drawings).
This construction is for the purpose of thickening the web in the drill blank
being milled as the groove cut therein approaches the shank, the taper slide
strap preventing any disengagement of the taper slide 9 from the intermediate
slide c.
FEED KNOCK-OFF MECHANISM.
A feed latch pin 68 is secured to the upper edge of the feed swivel box e¹, a
shoulder & being formed on the side of this pin. A plunger case r is secured to the
side of the drill slide saddle B and in this case is a plunger chamber within which
is located a spiral spring 2. The plunger is also located in this chamber and one
end of it has a shoulder adapted to engage the shoulder on the feed latch
pin 68. The spring 2 thrusts against the shoulder on the plunger and tends to
normally hold the plunger and latch pin in engagement. A feed knock off arm 7
is secured to the outer end of the plunger as by means of a nut 7, this arm
projecting above the edge of the plunger case. A feed knock off is adjustably
secured to the drill slide D by means of a headed stud », the head of which fits in
a longitudinal slot d' extending lengthwise in the body of the drill slide D, a nutr
being fitted on the outer screw threaded end of this stud to clamp the feed knock
off securely in position. This knock off is preferably keyed to the stud to prevent
rotation. The path of movement of this feed knock off is in line with the feed
knock off arm and extends downward far enough to engage said arm in the
lengthwise movement of the drill slide.
This construction provides for the automatic release of the feed worm e¹ from the
feed worm gear fand the consequent stopping of all the mechanism located on the
drill slide saddle, the feed swivel box dropping by gravity as soon as the feed
knock off plunger is released from engagement with the feed latch pin.
DRILL GUIDE MECHANISM.
A drill guide box sis secured to the top of the drill slide saddle B at the end
adjacent to the cutter spindle d, the cutter being located on the cutter spindle in
such position as to overlie this drill guide box, that is of pan shape and
constructed to receive the oil and chips that accumulate in the cutting of the
drill blank, a suitable outlet being provided to carry off this accumulation.
Secured within this drill guide box s, as by means of screws s³, is a base s¹
having a lengthwise groove therein. This base may be made integral with the
box if desired; and secured to the box and base is a drill guide holder s2
having a tongue 3 projecting within the groove in the base, thus preventing
any sidewise movement of the two parts on each other, the screws s extending
upward through the drill guide box into the drill guide holder s². A screw
threaded opening & extends lengthwise through the body of the drill guide
holders and in it fits a screw threaded bolt t2 passing through a downward
projecting part from one end of the drill guide slide t. This bolt t² is held
against lengthwise movement but free to rotate within the projection t¹ by means
of a washer t³ secured to the bolt on the opposite side of the projection from the
head thereof. This drill guide slide t is located in a grooves in the drill guide
holder s2 and has a sliding movement longitudinally therein. In the upper surface
of this drill guide slide are formed diagonal grooves t*, the grooves extending from
the outer edges of the slide at the end bearing the projection t¹ to a point where
they meet at the opposite end of the slide. A drill guide base consisting of two
members u and u¹ rests upon the upper surface of the drill guide holder and drill
guide slide and on the under surface of each member of the drill guide base are
tongues u², u³, fitting the diagonal grooves t' in the drill guide slide t. The drill

page_text: guide straps to are secured, as by means of screws, to the upper side of the drill'
guide holders near each end thereof, these drill guide straps having lips t
overhanging the feet u on each of the drill guide bases u and u¹, this
construction allowing of a side wise movement of the drill guide bases u and
but preventing any longitudinal movement. As the drill guide slide t is given a
longitudinal movement by means of the bolt t2 the tongues on the under side of the
drill guide bases lying in the diagonal grooves t in the drill guide slide causes the
drill guide bases and ¹ to move laterally. Drill guides v and v are secured to
the upper surface of the drill guide bases u and u¹ respectively as by means of
pins, the drill guides moving laterally with the bases. These drill guides
are adapted to lie with their sides in proximity or against each other and in
these adjacent surfaces and running lengthwise of the drill guide are grooves
or channels forming a guide opening into which a drill blank held within the
drill spindle chuck jaws 3 is adapted to project.
The operation of the machine briefly stated is as follows:
:-
A drill blank having been clamped in the drill holder by the mechanism described,.
and the shafts a and 3 being rotated, the feed swivel box et is raised bringing the
worm into engagement with the worm gear f. This action sets the whole-
mechanism in motion, the drill slide D being fed forward and the drill blank being
moved along underneath the cutter that operates upon it to cut a groove. The
blank is also projected into the drill guide described. The engagement of the taper
slide 1 with the cutter head slides causes the cutter to be moved upward, this.
operation increasing the thickness of the web as the drill blank is fed forward. In
this forward movement of the drill slide the spindle m is given a slow rotation which
causes a spiral groove to be cut in the drill blank. At the same time that the
drill slide is fed forward the drill slide saddle B is given a swinging movement
on the pivot b by means of the mechanism described. This causes the groove-
in the drill blank to be cut of a uniform width from point to shank as the cutter is
drawn away from the axis of the blank, this result being possible from the fact that
the pivot b is located directly in line with the diametrical axis of the cutter.
This causes the groove in the drill blank to be cut with any proportion between
its width at the point and at the shank as may be determined by the relation
between the longitudinal and axial movements of the carriage, as the cutter is drawn.
away from the axis of the blank, this result being possible from the fact that the
pivot b is located directly in line with the diametrical axis of the cutter.
If it is desired, as in some instances, to cut a groove runaing in an axial line-
along the drill for a portion of its distance, it would not be necessary to swing the
carriage in order to maintain the width of groove. For instance if it was desired
to finish up the end of the groove by cutting it straight for a short distance to give.
a peculiar finish, the clutch h³ and trip-mechanism would be so set as to stop the
swinging of the carriage at that time, so that the machine can cut a straight
groove. Of course the lever 02 would have to be operated to stop the rotation.
of the drill at the same time that the trip operated the clutch h³.
The clutch o is used as a means for ensuring that the grooves in the drill
shall be located diametrically opposite to one another. To accomplish this
result, the drill-spindle-clutch o is moved toward the clutch-yoke-bushing in by
the handle o². In doing this, it will be noted, the socket in the drill-spindle-
clutch will engage the pin o, the latter being secured to the clutch-yoke-bushing,
before the pins are disengaged from the sockets o' on the opposite side of the
clutch-yoke-bushing from that in which is located the socket for the pin o⁰. The
gear may then be rotated, and the handle of being free to move as soon as the
gear has received a half rotation, the spring of through the lever o² will force
the drill-spindle-clutch, or sockets therein, into engagement with the pins 16, the
sockets and the pins being relatively reversed to the position from that first occupied
by them. The machine may then be started up to cut a groove on the opposite
side of the drill-blank, the pin of being free from the socket in the drill-spindle-.
clutch and allowing the latter to freely rotate.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what [
claim is :-
1. In combination, in a machine for grooving drills, a frame or bed, a longi-
tudinally moving drill-blank-holder mounted on a pivoted saddle, the saddle pivoted
on the bed, means for imparting a lateral swinging movement to the drill-holding
spindle, means for longitudinally moving the holder, and a cutter having its
diametrical axis in alignment with the saddle-pivot, all substantially as described.
2. In combination, in a machine for grooving drills, a frame or bed, a longi-
tudinally moving drill-blank-holder mounted on a slide saddle, the saddle pivoted
on the bed, means for imparting a lateral swinging movement to the drill-holding-
spindle, means for longitudinally moving the holder, a cutter having its diametrical
axis in alignment with the saddle-pivot, and means for varying the distance
between the axis of the drill-holder and the cutter, all substantially as described.
3. In combination, in a machine for grooving drills, a frame or bed, a longi-
tudinally moving drill-slide supported on the swinging saddle, means for longi-
tudinally moving the slide, the drill-spindle borne on the drill-slide, the saddle
pivoted to the bed, means for imparting a sidewise swinging movement to the
saddle, the cutter having its diametrical axis in alignment with the saddle-pivot,
and means for moving the cutter away from the line of the axis of the drill-spindle,
all substantially as described.
4. In combination, in a machine for grooving drills, a frame or bed, a cutter-
spindle borne on a movable slide, a longitudinally moving drill-blank-holder
mounted on a pivoted saddle, the saddle pivoted on the bed, a laterally movable
taper slide pivotally connected with said drill-blank-holder and baving a bevelled
surface in engagement with the slide supporting the cutter-spindle, means for
imparting a lateral swinging movement to the drill-holding-spindle, and means for
longitudinally moving the holder, all substantially as described.
5. In combination, in a machine for grooving drills, a frame or bed, a cutter-
spindle borne on a movable slide, a longitudinally moving drill-blank-holder
mounted on a pivoted saddle, the saddle pivoted on the bed, a laterally movable
taper slide pivotally connected with said drill-blank-holder and having a bevelled
surface in engagement with the slide supporting the cutter-spindle, a lip on one
of said parts engaging a groove in the opposite part, means for imparting a lateral
swinging movement to the drill-holding-spindle, and means for longitudinally
moving the holder, all substantially as described.
6. In combination with the longitudinally moving and pivoted drill-holder of a
machine for grooving drills, a taper slide supported in operative relation to the
holder, the bushing in sliding engagement with the taper slide, the pivot in
engagement with the bushing, the bevelled surface on the taper slide, the groove
on the taper slide, the cutter-spindle-slide in engagement with said bevelled surface
and groove, means for longitudinally moving the holder, and means for giving it a
lateral swinging movement, all substantially as described.
7. In combination, in a machine for grooving drills, a frame or bed, a longi-
tudinally moving drill-blank-holder supported on a swinging saddle, means for
longitudinally moving the holder, the gear rotarily mounted on the holder, the
clutch-mechanism for securing the gear to the holder, the saddle pivoted on the
bed, means for imparting a lateral swinging movement to the saddle, and a cutter-
spindle mounted in operative relation to the drill-blank-holder, all substantially as
described.
8. In combination, in a machine for grooving drills, a frame or bed, a longi-
tudinally moving drill-blank-holder supported on a swinging saddle, means for
longitudinally moving the holder, the gear rotarily mounted on the holder, the
clutch device secured to the holder, suitable means such as a spring-pressed
plunger for automatically engaging the gear and clutch device, the saddle pivoted
on the bed, means for imparting a lateral swinging movement to the saddle, and a

page_text: cutter spindle mounted in operative relation to the drill blank holder all
substantially as described.
9. In combination, in a machine for grooving drills, a frame or bed, a drill-
holding-spindle mounted on a longitudinally moving drill-slide, a gear rotarily
mounted on the spindle, a clutch device for securing the gear to the spindle, the
slide supported on a swinging saddle, a feed-worm mounted on the saddle and in.
engagement with the drill slide to traverse it, the saddle pivoted to the bed, means
for imparting a lateral swinging movement to the saddle, means for rotating the
drill spindle, means for rotating the feed-screw, and a cutter-spindle supported in
operative relation to the drill holding spindle, all substantially as described.
10. In combination, in a machine for grooving drills, a frame or bed, a longi-
tudinally moving drill-holder supported on a saddle, the saddle pivoted to the bed,
a worm supported on the saddle and meshing with a stationary worm-gear, means
for rotating the worm, and a cutter-spindle supported in operative relation to the
drill-holder, all substantially as described.
11. In combination, in a machine for grooving drills, a frame or bed, a drill-
holder supported on a saddle, the saddle pivoted to the bed, a worm-shaft supported
on the saddle and meshing with a stationary worm-gear, a bevel-gear-shaft
connected to the worm-shaft, clutch-mechanism connecting said shafts, means for
rotating the bevel-gear-shaft, a cutter-spindle supported in operative relation to
the drill-holder, and means for changing the relative position of the cutter-spindle
and drill-holder in a plane parallel to the axis of the latter, all substantially as
described.
12. In combination, in a machine for grooving drills, a frame or bed, a drill-
holder supported on a swinging saddle, the saddle pivoted to the bed, a worm-shaft
supported on the saddle and meshing with a stationary worm-gear, a worm rotarily
mounted on a bevel-gear-shaft and meshing with the worm-shaft, clutch-mechanism
secured to the bevel-gear-shaft and adapted to connect the two shafts last mentioned,.
an automatic clutch-operating device, means for rotating the bevel-gear-shaft, a
cutter-spindle supported in operative relation to the drill-holder, and means for
changing the relative position of the cutter-spindle and drill-holder in a plane
parallel to the axis of the latter, all substantially as described.
13. In combination, in a machine for grooving drills, a drill-holder supported
on a longitudinally moving drill-slide supported on a swinging saddle, a worm-shaft
mounted on the swinging saddle and in engagement with a stationary gear, a
bevel-gear-shaft in engagement with said worm-shaft, the bevel-gear-shaft in
engagement with the drill-holder, the feed-screw mounted on the saddle and in
engagement with the drill-slide and bevel-gear-shaft, a feed-worm-shaft in mesh
with the drill-slide feed-screw, and a cutter-spindle mounted in operative relation
to the drill-holder, all substantially as described.
14. In combination, in a machine for grooving drills, a drill-holder supported
ou a longitudinally moving drill-slide, the drill-slide supported on a swinging
saddle, a worm-shaft mounted on the swinging saddle and in engagement with a
stationary gear, a bevel-gear-shaft in engagement with said worm-shaft, the
bevel-gear-shaft in engagement with the drill-holder, the feed-screw mounted on
the saddle and in engagement with the drill-slide and, bevel-gear-shaft, a feed-
worm-shaft in mesh with the drill-slide feed-screw and borne on a swinging
feed-swivel-box, the feed-swivel-box, a device for holding the drill-slide feed-
screw and feed-worm-shaft in engagement, the automatic releasing device, and
a cutter-spindle mounted in operative relation to the drill-holding-spindle, all
substantially as described.
15. In combination with the longitudinally moving drill-holder of a machine for
grooving drills, a base, an adjustable drill-guide-slide located on the base, and a
separable drill-guide supported on the slide, and means for moving the sections of
said drill-guide toward and from each other by the longitudinal movement of the
slide, all substantially as described.
16. In combination with the longitudinally moving drill-holder of a machine

page_text: for grooving drills, a base, an adjustable guide-slide located on the base, the
adjusting screw connected to the base and slide, diagonal grooves located in the
slide, separable drill-guides located on the slide and having tongues resting in
the grooves, and means for preventing the longitudinal movement of the drill
guides whereby they are opened and closed as the slide is moved, all substantially
as described.
Dated this Ninth day of Mox 1805
MOSES CARLYLE JOHNSON.
D. Young & Co.,
11 & 12 Southampton Buildings, London, W.C.,
Agents for the Applicant.