Improvements in Automatic Milling Machines.
Year: 1897

page_text: Date of Application, 9th Feb., 1897--Accepted, 24th July, 1897
COMPLETE SPECIFICATION.
Improvements in Automatic Milling Machines.
I, JAMES GREGORY, of Bridgeport, Fairfield County, Connecticut, United States of
America, Machinist, 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 new and useful improvements in automatic milling
machines, such for instance as are used to mill the straight sides of valve bodies, the
central or middle parts of valves hereinafter referred to as hubs, waste nuts and
the like.
It is the object of my invention to provide an automatic machine of the class
specified, which shall be particularly adapted for the milling of six sided hubs, such
for instance as are now used in the top of two-way valves and as is shown in Figure 18
of the accompanying drawings. In the construction of this machine I provide
adjustments to accommodate the different sizes of these hubs, means for securely
retaining them in position with respect to the cutters for milling the same, means for
carrying said hubs from one milling station to another, and means for
automatically removing the hubs from the machine after the same have been
finally completed.
Upon the accompanying drawings forming part of this specification, the same
reference characters denote like or corresponding parts upon the several figures, and
of which,
Figure 1 shows a front elevation of my novel machine, the mechanism thereof for
removing the hubs being broken away.
Figure 2 is a side elevation of the machine as seen from the left of Figure 1, the
hub removing mechanism being detached.
Figure 3 is a top plan view of the machine, the hub removing mechanism 0 being
shown in sectional plan.
Figure 4 is a vertical cross section on line a-a of Figure 3.
Figure 5 is a plan view of the machine, with the milling heads and their slides
removed therefroin, the cover of the table B being removed, showing the gearing
mechanism.
Figure 6 is an inverted plan view of the top cover 34 of the table B.
Figure 7 shows a detached side elevation and a plan view respectively of one of the
slides 83 which support the carriage 76 of the milling head.
Figure 8 is an inverted sectional plan view on line b-b of Figure 1, looking in the
direction of arrow.
Figure 8A is an inverted detail sectional plan view through shaft A, taken on
line -b of Figure 2.
Figure 9 is an enlarged sectional plan view on line c-c of Figure 2 (see
arrow).
Figure 10 is a sectional plan view on line d-d of Figure 1. (see arrow)
Figure 11 is a sectional plan view, partly broken away, on line e-e of Figure 1. (see
arrow.)
Figure 12
and 10.
is an enlarged vertical sectional view on line f-f of Figures 9

page_text: Figure 13 is an enlarged vertical central sectional view through one of the milling
heads C as taken on line g-g of Figure 3.
Figure 14 is an enlarged central vertical sectional view of one of the movable
holders D, taken on line h of Figure 3, said holder showing a hub secured therein
ready to be milled.
Figure 15 is a similar sectional view, the central post 49 thereof and its hub being
in a raised position to permit the free detachment of said hub.
Figures 16 and 17 show a side elevation of a detachable seat i and a fitting; which
are shown in section in Figures 14 and 15, said seat and fitting being inade in various
sizes which are substituted to accommodate different sizes of hubs to be
milled.
Figure 18 shows a side elevation of one of the finished hubs, also the valve of which
it forms a part.
Figures 19 and 20 show vertical sectional views taken on lines and respectively,
of Figure 9.
Figures 21 and 22 show enlarged sectional elevations of clutch mechanism taken on
line m of Figure 11, looking in opposite directions.
Figure 23 is a vertical longitudinal sectional plan view of said clutch mechanism
shown in Figs. 10, 21 and 22.
Figure 23 is a horizontal longitudinal section taken at a right angle to
Figure 23.
Figure 24 is a detached side elevation of the automatic mechanism for removing
the hubs from the machine after they have been milled.
Figure 25 is an enlarged sectional plan view on line n of Figure 24 showing in
dotted lines the moved position of the arm E which throws the completed hubs from
the machine.
Figure 26 is an enlarged detached side elevation of said arm E.
Figure 27 is a cross section on line o-o of Figure 25, the spring actuated slide 153
being drawn out.
Figure 28 is a central vertical sectional view of the hub removing mechanism, the
position of the parts agreeing with Figure 24 of the drawings.
Figure 29 is a top plan view of Figure 24.
Figure 30 is a sectional plan view on line p-p of Figure 28.
Figures 31 and 32 show side elevations of the closed and open positions of the
gripping head F for removing the hubs.
Figure 33 is a central vertical sectional view of said gripping head, the position of
the parts agreeing with Figure 32.
Before entering into a detailed description of the construction of my machine, I will
briefly state the method of operating the same, to afford a general idea of its operation
and construction. The machine consists of suitable frame work and driving
connections, whereby the table B is given a number of rotary movements, eight of
which constitute a complete rotation. Said table is provided with holders D which
serve to retain the hubs to be milled in their proper position during the several cutting
operations thereon by the movable millers G, H, I, K, L and M. These millers are
stationed at equal distances apart upon the frame of the machine, and each serve to
mill off the respective surfaces g', h', i', k', l', and m' of said hub. By the time the
several surfaces of the hub have been milled, the same is around at the left of the
table (see Figures 1 and 3) in line with the mechanism for removing the same,
which mechanisın is shown in Figures 24 to 27 inclusive, and operates as
follows:-
The hub is removed by a downward movement of the gripping head F, after which
the jaws thereof are forced together, then the head is given a rotary movement which
disconnects the hub from its holder D, after which said hub is elevated sufficiently
to allow the plate 148 to pass thereunder to receive said hub, whereupon said jaws are
opened and the hub allowed to drop, after which the plate is carried to the dotted
position shown in Figure 25, where it is tilted outward, thereby dropping the hub
therefrom. The holder then moves backward to receive another hub and the
operations are so repeated.

page_text: It will be obvious from an inspection of the drawings, that the construction and
operation of the mechanism of each of the eight holders D; the six cutters, and the
mechanism immediately connected therewith, are substantially each duplicates of the
other in each instance. Therefore, I will refer to the like parts of these several sets of
mechanism with similar reference characters throughout the various figures in the
drawings.
FRAME AND DRIVING MECHANISM.
Referring to the reference characters upon the several figures of the drawings'
1 indicates the bed plate of the machine, 2 legs supporting the same, 3 hangers secured
to the underside of bed plate and which support shafts of the driving mechanism.
4 indicates vertical posts which are screwed to the bed plate and have bolted to their
upper end a circular frame 5, all of which constitutes the main frame of the machine.
Referring to Figures 1, 3 and 10, 6 indicates the main driving wheel, 7 its shaft, and
8 a bearing for the same. Said shaft 7 is also journaled in one of the hangers 3 of
the frame work and bears upon its inner end a small beveled pinion 9 to engage with
and drive an idler 10 upon the depending stud 11 secured to the underside of the bed
plate. The idler 10 above mentioned serves to transinit motion to each of the five
beveled pinions 12 of the radial shafts 13, journaled in the legs 2 and hangers 3
before mentioned. These shafts are provided with pulleys 14 upon their outer ends,
which in turn are provided with belt connections 80 with milling heads C on the top
of the machine, which will be later described.
The beveled pinion 12 of the shaft 13* (see Fig. 11) serves to drive the worm 15
through clutch mechanism N on said shaft as follows: referring to Figures 21, 22,
and 23, the shaft 13" is provided with a disk 16 which is hollowed out to receive clamping
mechanism shown in Figures 22 and 23, the construction of which is as follows: The
outer end of the shaft 13ª is bored to receive the slidable shank 17 of the hub 18
which latter is engaged by the operating lever 19 and moved in and out. The inner
end of this shank 17 is provided with a pin 20 which passes freely through a central
slot 20 and engages a ring 21 loose upon said shaft, but which turns with it by
reason of the connection just mentioned. This ring is provided with a peripheral
groove to receive semi-circular shoes 22 having link connections 23 with the wedges 24
which move radially and serve to simultaneously engage the inclined ends of the
semi-circular blocks 25 and force them outward against the action of springs 25ª
which are securely fastened to the hub 15" of the worm 15. From the above
construction, it will be obvious that with each outward movement of the operating
lever 19 the hub 18 and its shank are forced in and the wedges will be forced
outward, owing to their toggle connections with the shank aforesaid, thus spreading
the semi-circular blocks, which in turn instantly engage the inner surface of the disc
16 secured to shaft 13ª, thus completing the connection between said shaft and the
worm 15 before mentioned.
GEARING FOR DRIVING SHAFT A.
The worin 15 upon the shaft 13ª (see Figs. 11 and 12) connects with and drives
the gear 26, the hub of which provided with a gear face 27 to engage that of an
idle gear 28, which is made integral with an elliptical gear 29, meshing with and
driving another elliptical gear 30 on the vertical shaft A. This train of gearing is
employed to communicate power to all the machine except the several cutters, and
owing to the employment of the elliptical gears 29 and 30 it will be obvious that the
shaft. A is afforded an irregular rotation, that is to say, that one half of said rotation
is accomplished in about one quarter of the time that it takes to complete the remainder
of said rotation. The above movement of said shaft is particularly desirable inasmuch
as it moves the ring 62 slowly in its forward movement while the milling is effected,
and quickly in its return idle movement. Said shaft A (see Figures 1, 2 and 12) is
suitable journaled in the bearing 31 secured to the bed of the machine and the
bracket 31 upon the underside of the frame 5 previously mentioned, and serves to

page_text: move the millers during their cutting operation; also, to rotate the table B, and
further, to operate the mechanism for removing the hubs.
SETTING TOOL R.
Upon and to the front of the frame 5 (sec Figures 2 and 3) I provide a tool R for
setting the hubs with relation to the cutters prior to the beginning of an operation,
and whereby all of the hubs are set alike upon their holders and with proper relation
to the table. Said tool consists of a hollow post secured to the frame 5 and having a
vertically adjustable T shaped piece R¹ secured therein, which piece is bored to receive
the spring actuated setting tool R, designed to be forced in by the operator until the
tip thereof engages the side of the hub and thus retains the same against any rotary
movement while being drawn down upon its seat.
ROTARY TABLE B, FOR SUPPORTING THE HOLDERS.
The table B, (see Figures 3, 4 and 5) which supports the holders D for the hubs,
consists of a base 33 and a cover 34 (see Figures 5 and 6) which are suitably secured
Said table is
together by means of screws engaging the holes 35 of said base.
secured to and supported upon a short hollow column 36 which in turn is mounted
upon a large cam faced disk 37, journaled upon the stationary post 38, the base of
which is suitably bolted to the bed plate 1 of the machine. In connection with the
above, I employ means for adjusting the height of said table with relation to the bed
plate, and whereby the proper depth of the cuts in the hubs are secured, which
consists as follows: I thread the lower enlarged portion 39 of the post 38 and provide
thereon an adjustable nut 40 which as shown, (see Figure 4) serves to support the cam
faced disk 37, which in turn supports the column and table secured thereon. It will
be obvious that by turning said adjustable nut 40 to the right as shown in said
Figure 4, the table will be raised in accordance therewith, while a reverse movement
will have an opposite effect. By this means, applicant is not only enabled to secure
a very accurate adjustment for raising and lowering the table, but is at the same time
able to adjust all of the holders, simultaneously.
OPERATING CONNECTIONS FOR TABLE B.
The table B and the parts secured thereto are operated from the before mentioned
vertical shaft A (see Figures 4 and 10) by means of an arm 41 secured thereto bearing
a pin to engage the radial slots 42 of the disk 37, the adjustment and operation of
which is such as to insure said pin engaging one of said slots with each rotation of
the shaft A, thereby moving said disk 37 one eighth of a turn, which, as will be
remembered, is the movement required to carry the hubs from one cutter to another.
In order to hold the disk 37 and the parts carried thereon perfectly rigid during the
milling operation, I secure a sectional disk 43 to the vertical shaft A, which disk is
set in opposite relation to the arm 41 of said shaft, and in such a manner that when
the pin of said arm 41 becomes disengaged from the slot 42 of its disk 37, said disk 43
will have sufficiently entered one of the concave recess 44 in the periphery of said
disk 37 to retain the same perfectly rigid until the pin of the arm has moved around
and entered the next slot 42 in the underside of the disk, thereby moving the same.
THE HOLDERS D. FOR SUPPORTING THE HUBS.
which serves to firmly retain
milling operations, will be
In the above connection I
The mechanism which I have termed as a holder and
the hubs in position upon the rotary table B during the
best understood with reference to Figures 4, 14 and 15.
provide renovable fittings for different sizes of hubs as shown in Figures 16 and 17. I
also provide means for firmly retaining said hubs in position on said holders; for
independently adjusting said holders with relation to the table; for automatically
releasing the mechanism for clamping the hubs in position, and finally, for removing
the finished hubs from said holders. Within the base of the table B, I form a series

page_text: of bores arranged at an equal distance apart and provide the same with bushings 45
which are adjustably secured therein by means of a set screw 46 upon the underside.
Within said bushings I provide a spindle 47, the upper and enlarged face of which is
cut to form a gear 48, said gear having connections for rotating said spindle which I
will later describe. Within this spindle 47 is a vertical post 49. To its upper end is
attached the fitting j, to which the hubs are screwed. Around this fitting and to
the threaded hub 50 of the spindle 47 is attached a scat i upon which the hub is
clamped. The means whereby said hub is clamped upon said seat i, and also whereby
the same is freed from such engagement, is placed upon the underside of the table,
and consists as follows: I thread the lower periphery of the spindle 47 and provide the
same with a star wheel 51, the hub of which is internally threaded to engage those of
the spindle, whereby the two become in a measure fixed together. The central post 49
which is adjustably secured within the spindle 47 is provided with a lead screw 52,
journaled in the lower hub 53 of the star wheel 51, and is provided upon either side
of said hub with the collars 54 and to the lower end is attached an operating wheel 55.
It will be obvious from the construction just outlined, that a movement of the
hand wheel 55 will raise or lower the post 49, and thus change the position of
the hub. It will further be obvious that a movement of the star wheel upon
the threaded spindle 47, will in like manner raise or lower the lead screw 52 and the
post attached thereto. Therefore, in the practical operation of my machine, the hubs
to be milled are screwed to the upper extremnity of the fitting ; as shown in Figure 15,
after which the operator manipulates the hand wheel 55 in a manner to lower the
post 49, thus drawing the hub contained thereon down fully against its seat, as shown
in Figure 14. In this position said hub remains, with relation to its spindle,
throughout the several operations, and until the star wheel 51 is engaged by suitable
antomatic mechanism, which will later be described, and whereby said wheel is given
substantially a sixth of a turn upon its spindle 47, which movement is sufficient to
slightly raise the post 49, thereby disengaging the hub from its seat and leaving
it in a position free to be detached by means of the mechanisn provided for that
purpose.
MECHANISM FOR RELEASING THE HUBS.
The mechanism for operating the star wheel above mentioned, whereby the hubs
are automatically released from the spindles of their holders 1), is mounted on the
vertical shaft A, and consists in an arm 56 secured thereto, bearing a pin to engage
one of the recesses of the star wheel, which is then detained at the station nearest to
said vertical shaft A as clearly appears in Figure 8 of the drawings. It will be obvious that.
this engagement and operation will move the star wheel upon its spindle one sixth of
a turn, thereby raising the vertical post 49 and freeing the hub thereof. At the
instant the hub just referred to has been freed from its seat i, the mechanism for
removing the same from the holder is next operated in a manner to unscrew said hub
from its fitting j, as will be later more fully described.
MECHANISM FOR SETTING STAR WHEEL.
In order to prevent the complete unscrewing of the star wheel from its spindle, I
provide means for turning said star wheel in a reverse manner to that described
above, which movement insures said star wheel being set at the beginning of each
operation at substantially the same place. This mechanism consists (see Figures 2,
8 and 9) of a bell crank lever 60 pivoted at 61 to the ring 62 which is given a
remittent oscillatory movement by means of connection with the vertical shaft A, as
will be later more fully described. Upon the frame 5 is secured a plate 63 having a
cam groove therein to receive the pin of an arm 64 of the bell crank lever. It will
be understood from this construction that with the forward movement of the ring and
its bell crank lever from the position shown in full lines to that shown in dotted lines
(see Figure 8) the pin of the arm 65 will be brought into line with one of the teeth
of the star wheel and will be engaged thereby during the forward movement thereo.

page_text: thereto by means of a set screw 79, said pulley being connected and driven by the
belt 80 of the before mentioned pulleys 14.
MECHANISM FOR MOVING AND ADJUSTING THE MILLING HEADS.
The carriages 76 of the cutting heads above described, are provided on their under-
side with dovetail ways 81, cut at a right angle to the spindle, and into which fit
corresponding dove tails 82 of the slides 83. This construction permits to said
carriages a cross movement on said adjusting slides. The adjustable slides 83 are
fitted to the top of the frame 5 and made radially movable thereon by means of a
groove 84 in each side of the said slide, which groove snugly fits into suitable tongues
of the intermediate plates 85, screwed to the top of frame 5. Within the carriage 76
(see Figure 13)is firmly secured a depending pin 86 which extends through an orifice 87
in the adjustable slide 83 and through a second orifice 88 in the top of the frame 5,
engaging a cross slot 89 in the top of the before mentioned movable ring 62. It
will thus be observed, that the movements of the carriage 76 of the milling head is
secured from said ring 62 through the medium of the pin 86. The slides 83 are each
made adjustable upon the frame 5 by means of a screw 90 passing through the outer
depending end 83% of said slide, and is provided upon the inside with a fixed collar 91
and a threaded portion 92 to engage a corresponding tapped hole in the face of
the frame 5, the outer end of said screw 90 being provided with a shouldered square
head 93 whereby the same is engaged and turned with a suitable wrench. Adjacent
to said head, I firmly clamp a suitable collar 94-a portion of the peripheral face being
finished flush with a plate 95 secured to the slide 83. These adjoining faces or
peripheral surfaces 96, may be provided with suitable graduation marks, whereby the
amount of turning of the screw 90 and its collar or pointer 94 will be easily deter-
mined, and whereby the several screws and the cutters may be accurately adjusted
with relation to each other. In connection with the adjusting operation, I preferably
employ a tool provided for the purpose, by placing the same against the post 97 of
the table and between the cutters to be adjusted, then turning said screw until the
cutter is brought up against the tool, which accurately indicates the space between
the two points of engagement. From the above it will be obvious that the cutters
may be easily adjusted for the different sizes of hubs, by simply turning this screw 90
in the direction desired, whereupon the slides 83, the carriage mounted thereon, and
its cutter, are readily shifted in or out according to the way the screw has been
turned. It will further be obvious that by reason of the slots 89 in the ring 62, the
posts 86 which are engaged thereby move freely therein with said adjustment.
MECHANISM FOR REMOVING THE HUBS.
The mechanism whereby the hubs are automatically removed from the holders after
they have been properly milled will be best understood with reference to Figures 1,
3, 8, 24 to 33 inclusive. In order to properly support the gripping head F and
mechanism for operating the same, I provide a suitable frame work 0, consisting of
three parts, 100, 101 and 102. The part 100 serves as the main support and is pro-
vided with a flange 103 which fits upon the top of the frame 5 and is secured thereto
by means of screw bolts, as shown. Beneath the section 100 is bolted the cylindrical
section 101, which is suitably cut away (see Figure 8) as at 104 to admit of the intro-
duction of the driving gear 105 on the vertical shaft Albefore mentioned. Said gear105
meshes with and drives a gear 106 secured to the shaft 107 journaled within the
several sections of the frame above mentioned. Secured to the lower end of the
shaft 107 is a groove cam 108 around which I fit an intermediate cup-shaped piece
109 and through the side thereof I insert a pin 110 to engage the groove of said
cam 108 and a vertical slot 111 in the before inentioned cylindrical section 101.
construction insures a remittent vertical movement to said piece 109 with the rotation
This
of said cam and its shaft which movement is for the nuruase of vortioally racinrocating

page_text: by means of a slot in said link, and a spring 115 designed to engage said lever
and firmly hold the pin in the end thereof, against the upper end of the slot of the
link. The lever 114 is pivoted to the pin 116 of the post 117 which post is secured
to the section 102 of the frame. The outer end of this lever (see Figures 24 and 28)
engages a suitable collar 118 on the vertical spindle P of the gripping head F. From
the connections thus far described it will be apparent that the gripping head is
afforded a vertical reciprocating movement by means of the cam 108 and its connec-
tions with the rod 112. In additiou to the vertical reciprocating movement above
mentioned, it is necessary to provide a rotary movement and also means for closing
and opening the jaws at the proper time. Said movements are accordingly secured
through the following mechanism. Upon the upper end of the shaft 107 I provide a
cam 120 bearing a groove to receive a pin of the segment 121 which is pivoted at 122
to the frame and which is provided with a semi-circular slot 123 to allow the free
movement of the rod 112 therethrough. The segment 121 meshes with and operates
the pinion 124 of the segment 125, both of which are pivoted upon the before
mentioned post 117. The movable segment 125 meshes with the teeth 126 of the
spindle P, transmitting thereto a rotary remittent movement. Thus, it will be
apparent that with each complete rotation of the shaft 107 the cam 120 thereof will
cause the segment 121 to be thrown to and fro, which in turn will rock the segment 125
and it in turn will remittently rotate the spindle P, it being obvious that in the
first of said rotary movements said gripping head acts to unscrew the hub from its
holder, after which the spindle of said head is elevated to the position shown in
Figure 28, whereupon the second, and opposite rotary movement is imparted to the
spindle of the head and the hub thus freed.
MECHANISM FOR OPERATING THE JAWS.
The mechanism whereby the jaws are operated will be next described and consists
as follows: (see Figures 24, 28, 31, 32 and 33). The spindle P is provided with a
finely threaded reduced portion 127 which engages a correspondingly threaded bore
in the shank 128 of the gripping head. The spindle P is further provided with a
reduced lower threaded extremity 129, which, as will be observed, is not only a
coarser thread, but is a left hand thread, the upper thread being a finer and a right
hand thread. This lower thread extremity 129 engages a correspondingly threaded
shank 130 of a square toggle block 131. Said shank is movably fitted in the bore 132
and is moved vertically therein by the turning of said threaded extremity 129. The
gripping head proper is provided with a recess 133 in each side thereof, in which are
fitted slidable pivotable blocks 134 made adjustable therein by means of a screw 135
retained central with said head, the two free outer ends being provided with right
and left threads respectively to engage correspondingly threaded holes in said slidable
pivotable blocks. To these blocks 134 I pivot the clamping jaws 136 which are
connected at their upper ends by toggle connection 137 with the toggle block 131
before mentioned. The lower extremity of these jaws 136 are provided with suitable
yieldable tips 138 which are held in their normal position by means of the springs 139
as will be readily understood with reference to Figure 33. From this it will be
perfectly understood, that an upward movement of the toggle block 131, and the
connection thereof with the jaws, will spread the upper end, thus closing the lower,
thereby firmly clamping therein the hub, and that a reverse movement of said toggle
will in like manner release the hub.
MECHANISM FOR OPERATING THE GRIPPING HEAD F.
The connection between the spindle P and the gripping head, whereby its jaws
are actuated irrespective of the rotary movement of the said head, will be best
understood with reference to Figures 24, 31 and 33, and is as follows: the shank P is
provided with a collar 140, having a shoulder to engage a corresponding shoulder 141
on the upper end of the shank of the gripping head. Said shoulders are engaged as
in Figures 32 and 33, when the gripping head is lowered and ready to grasp a hub.

page_text: At this instant the spindle P is rotated in the direction of arrow t (see Fig. 33) which
movement will cause the threaded portions 127 and 129 to turn in their respective
engagements. The portion 129 being a coarse thread, operates faster and closes the
gripping jaws through their toggle connection, during which operation the threaded
portion 127 has been screwed out about two turns and substantially as shown in
Figure 31. The gripping head in this position is raised vertically by means of the
connections previously described, with the cam 108. The gripping head is thus
raised, together with the hub clamped therein, to the position shown in Figure 24,
which shows the spring actuated pawl 142 of said gripping head in engagement with
the shoulder 143 of the section 102 of the frame. The gripping head thus
positioned, an opposite rotation is imparted to the spindle P thereof, which causes the
threaded portions 127 and 129 to turn in their shanks, the latter acting faster than
the former, thus serving to open the jaws and drop the hub, while the former thread
127 screws into the shank until the shoulder 141 is engaged, at which instant the
lowering mechanism begins to operate to again lower the gripping head, the jaws of
which are then in an open position and at a proper angle with respect to the sides of
the hub which is next to be engaged.
MECHANISM FOR REMOVING THE HUBS FROM THE MACHINE.
As the hub is freed from the gripping head, I provide further mechanism for
receiving the same and dropping it into any suitable receptable which may be placed
beside the machine. This mechanism is illustrated and will be best understood with
reference to Figures 3, 24, 25, 26, 27 and 28. Referring to the latter figure, it will
be observed what I provide upon the shaft 107 and within the section 100, a cam 144
bearing a groove to engage a pin 145 of the lever 146 pivoted to the section 102, as at
147. It will thus be seen from the construction described, that the lever 146 is given
an outward movement (see dotted lines Figure 25) in which position the receptacle 148
which receives the hub, is tilted to one side by the following mechanism. The receptacle
148 is provided with a shank 149 which is movably fitted into a bore of the adjustable
section 150 of said lever 146, which section is provided upon its underside with a
radial slot in which is fitted a screw 151 to engage the shank 149 before mentioned.
Thus it will be seen that said shank is prevented from being drawn from its bearings,
and is free to turn substantially one quarter of a rotation therein. Upon the shank
149 I provide an arm 152 which serves as a connection for turning said shank and is
actuated as follows. The end of said arm 152 enters a recess of the spring actuated
slide 153, which is fitted in the section 150 of the arm and provided upon its outer
end with a spring actuated pawl 154 to engage the post 155, when the arın is thrown
in the outer direction as shown in dotted lines. Thus it will be apparent that when
said arm is thrown to its outer position, the spring actuated pawl 154 will pass by
and engage the upper end of the post 155 and that when said arm begins its return
movement said engagement of the pawl with the post will cause the slide 153 to be
drawn outward, as shown in Figures 25 and 27, in such a manner that the plate 148
will be tilted sufficiently to cause the hub to be dropped therefrom.
with this mechanism I have provided means for adjusting the height of the receptacle
148 by means of a screw 156, which passes freely through a bore 157 of the lever 146
and engages the vertically dovetailed end of the section 150.
SAFETY MECHANISM.
In connection
As before stated, I provide means consisting of the bell crank lever 60 for setting
the star wheel 51, in substantially the same position at the beginning of each
operation. At the same time it is obvious that if by accident or otherwise, the star
wheels should be turned upon the spindle and thus be out of position to be properly
engaged by the arm 56 of the vertical shaft A, the safety device which I have
provided will insure the stoppage of the machine in case said wheels are not in their
proper position at the time the same are brought round to the station where the
hubs are released. Said safety device, (see Figures 2, 8, 9, 19 and 20) consists in

page_text: part of the operating lever 19, which is provided with a spring 158 designed to throw
said lever and its clutch member out of operative engagement, thus stopping the
machine. Said lever is further provided with means for holding it in an engaged
position, consisting of a rock shaft 159 fitted into bearings 160 secured to the bed 1
and frame 5, which shaft has an arm 161 thereon, to engage the arm of the lever 19.
It is also provided with a handle 162 by means of which the operating lever 19 is
released by hand and its spring allowed to act in a manner to throw the same out of
engagement. To the underside of the frame 5, I secure a depending support 163,
the lower end of which has a bore to receive the free ends of the cross rod 164, the
opposite end being connected to an arm 165 upon said rock shaft 159. Against the
collar 166 of said rod 164 is normally held a block Q, by means of a spiral spring 167,
said block being held against any rotary movement by reason of a key 168 being
secured in said block and passing freely through an orifice in said rod, which
construction permits a lengthwise movement of the block upon the rod.
The block Q is provided upon its inner side with a cam lug 169 which is engaged
by the arm 56 on shaft A at each rotation of said shaft. From the construction thus
far described, it will be seen that with each rotation of said shaft and its arm, the
block Q will be engaged thereby and moved upon its rod against the action of its
spring, thus not effecting the rod 164. In addition to the pin connection above
described, I provide a removable connection (see Figures 19 and 20) which is normally
held in engagement as shown in Figure 19, during which time it is obvious that the
rod will be moved with the block, unless the same is drawn out of its engagement.
This removable connection consists of an engaging slide 170 having a depending. arm
provided with a link connection 171 with the pivotal lever 172, the upper end of
which is in turn provided with a link connection 173 with the outer arm
of a bell crank lever 174 pivoted to a stud 175. It will be observed that the inner
arm of this bell crank lever is in line with the movement of the outer tooth of the
star wheel, and that if said star wheel is in its proper position, said outer tooth will
engage the arm of said bell crank lever, and thus draw out the slide and allow the
block to move upon its rod against the action of the spring 167, by reason of
the engagement of the arm 56 with said block, thus not effecting the running of the
machine; but if said tooth is not in line, the arm will not be engaged and the arm 56
will engage block Q, thus operating the rod 164 in a manner to trip the operating
lever to release the clutch.
The
Having thus described the construction of my machine, I will briefly describe
its operation, in which attention is particularly called to Figures 1, 2 and 3.
operator in charge, stands in front of the machine and places the hubs upon the
holders D, one at a time, when said holders are at the front station, and sets said
hubs at a proper angle with respect to the cutter, by means of the tool R provided for
that purpose, attached to the frame 5, after which the operator manipulates the
hand wheel 55, thereby drawing the hub down upon its seat i, firmly clamping the
same with relation to the holder. After the hub has been seated, the operator
manipulates the handle 19 in a manner to engage the clutch mechanism, thereby
operating the upper portion of the machine, through vertical shaft A. Said
operation serves to rotate the table and carry the hub to the first milling station G,
where the cutter operates to mill off the outer surface g¹ of the hub, during which
time the operator has placed a second hub on the holder, then at the front station,
after which the table rotates automatically an eighth of a turn, carrying the first
hub to the station H and slightly turning said hub during said movement in a
manner to ensure the proper engagement of the cutter with the next surface h' of
said hub. During this operation the third hub has been placed upon the holder D at
the front station, and the machine in its continued movements rotates the table another
eighth movement carrying the first hub to the station I where the surface i¹ of said
hub is milled, making the third operation thereon. The operations are continued in
the above manner upon the successive hubs until the remaining surfaces k' l' and m¹
thereof have been properly milled at their respective stations K, L, and M, respectively,
thus completing said hub. The further movement of the table brings the first hub

page_text: beneath the gripping head of the mechanism for removing said hub, whereupon the
same operates simultaneously with the cutting operations of the several cutters, in a
manner to remove the hub from the holder and drop it from the machine. This.
operation being completed, the successive hubs are in like manner removed, leaving
the holders free to be immediately supplied with additional hubs. Thus the machine.
may continue in its operations at a rapid speed and produce in the course of about an
hour, three hundred and fifty milled hubs.
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. In a milling machine as described, the combination with an intermittently
rotary table, holders carried thereby, adjustable slides fitted laterally in the frame,
radially moving reciprocating carriages mounted in said slides and bearing rotary
cutters, means for operating said slides, a movable ring fitted in said frame,
connections between said ring and carriages, thereby the latter are reciprocated.
2. In a milling machine as described, the combination with an intermittently
rotary table having holders of a series of slides bearing rotary cutters mounted
in the frame, means for adjusting said slides with respect to the holders, means
for accurately determining the amount of said adjustment.
3. In a machine of the class described, the combination of the frame, a ring
movably fitted thereto, means for reciprocating said ring, slides fitted to the frame,
cutters mounted upon said slides, connections between said rings and cutters, whereby
the latter are reciprocated by the former, means for holding the work in a
stationary position while being milled, and means for moving said work from one
cutter to another.
4. In a machine of the class described, the combination of the frame, a ring fitted
within said frame and provided with means for reciprocating the same, slides fitted
in ways of the frame, means for adjusting said slides, cutters mounted upon said
slides, connections between said rings and cutters whereby the latter are reciprocated
by the former, means for holding and advancing the work to successive cutters and
means for so changing the work as to present a new surface of the work to the
cutter aforesaid, at each successive advancement of the former.
5. In a milling machine, the combination with a rotary table, of a spindle journaled
therein, a post within said spindle and adapted to retain work thereon, a lead screw
engaging said post and adapted to be operated, to clamp the work to said spindle,
mechanism connected with said lead screw and spindle, whereby they are automati-
cally operated in a manner to release said work.
6. The combination in a milling machine with the table, of a rotatable spindle
having a threaded extremity, a star wheel threaded to engage said spindle, a
post movably fitted in said spindle and adapted to retain work on its upper end,
a lead screw journaled within the hub of the star wheel and engaging the post,
whereby the same is adjusted with relation to the spindle.
7. The combination in a milling machine, of a rotatable spindle having a spindle
extremity, a star wheel 51 to engage said spindle extremity, a post movably fitted in
said spindle and adapted to retain work to be milled, a lead screw journaled within
the hub of the star wheel and engaging the post for adjusting the same, means
for operating the wheel 51, whereby the post is raised or lowered with respect to
the spindle.
8. The combination with the table of a milling machine, of a rotary spindle
having a threaded extremity, a star wheel fitted to said threaded extremity, a
vertically movable post fitted in said spindle and adapted to retain work on its
upper end, connections between said post and star wheel, whereby said post is
raised and lowered by a movement of the wheel, and means for imparting to said
wheel a rotary movement.
9. The combination in a milling machine, of the bed, a post secured thereto
and provided with a threaded portion 39, a hollow column pivoted on said post

page_text: and supporting a table, a disk secured to said column and bearing a series of
radial slots, means for intermittently engaging one of said slots and transmitting to
said column and table a remittent rotary movement, an adjustable ring attached
to said threaded portion and adapted to support said column and table, substantially
as described.
10. The combination in a milling machine, of the bed, a post secured thereto and
provided with a threaded portion 39, a hollow column pivoted on said post, a table
mounted upon said column and bearing a series of work holders, an adjusting ring
attached to the threaded portion and adapted to support said column and table,
substantially as described.
11. The combination in a milling machine, of the bed, a post secured thereto and
provided with a threaded portion 39, a hollow column pivoted on said post, a table
mounted upon said column, an adjustable ring attached to the threaded portion and
adapted to support said column and table, posts 4 secured to the bed, a frame 5
secured to said posts and encircling the table as aforesaid substantially as
described.
12. The combination of the bed, a post secured thereto, a hollow column
pivoted to said post, a table mounted upon said column and bearing a series of
rotary work holders, a fixed gear 57 secured to said post, idle gears 58 secured
to the table and adapted to travel around said fixed gear with the movement of
said table, idlers 59 meshing with the idlers before mentioned and the gear
face of the rotary holders, thus intermittently rotating the same by the movement
of the table.
13. In a machine of the class described, the combination of the fixed post 38
the table mounted thereon and provided with means for intermittently rotating the
same, a gear 57 fixed to said stationary post, idlers 58 journaled on studs of said table
and meshing with said fixed gear, idlers 59 secured to said table and meashing with
the before mentioned idler 58 and the gear of the rotatable holders, holders carried
by and journaled within the table and intermittently rotated by said table through
connections above recited.
14. In a milling machine, the combination with an intermittently rotary table
suitably journaled upon a post and carrying work holders, a disk secured to a hollow
column supporting said table and bearing radial slots, a driven shaft adjacent to said
table and bearing an arm to engage the radial slots thereof at each rotation, and a
series of slides bearing rotary cutters mounted in the frame, means for adjusting the
slides with respect to the holders, means for accurately determining the amount of
said adjustment.
15. In a milling machine, the combination with an intermittently rotary table
suitably journaled upon a post and carrying work holders, a disk secured to a hollow
column supporting said table and bearing radial slots, concave recesses in said disk
between said slots a driven shaft adjacent to said disk and bearing an arm to engage
one of said slots with each rotation, thereby intermittently rotating said table, slides
fitted laterally in the frame, radially moving reciprocating carriages mounted in
said slides, means for operating said slides, a movable ring fitted in said frame,
connections between said ring and carriages whereby the latter are reciprocated,
substantially as described.
16. In a milling machine, the combination with the main driving shaft 7, of a
bevel gear 10, radial shafts bearing pinions meshing with said bevel gear, connections
with said radial shafts, cutters operated through said connections, connections of one
of said radial shafts with an eliptical gear, a second eliptical gear meshing with the
eliptical gear aforesaid and secured upon an intermediate shaft A, whereby the latter
is given an irregular rotation, connections with said shaft and the cutters, whereby
the same are advanced slowly in their cutting operation, and rapidly in their return
movement.
17. In a machine of the class described, the combination with the main driving
shaft 7, of bevel gear 10, radial shafts bearing pinions meshing with said bevel gear,
connections with said radial shafts whereby the cutters are operated, connections with

page_text: one of said radial shafts with a vertical shaft A, for operating the table of the
machine, clutch mechanism interposed between said radial shaft and the vertical
shaft, whereby the movement of the latter is controlled.
18. In a milling machine, the combination with the driving shaft, of connections,
including eliptical gears, between said driving shaft and intermediate shaft A,
whereby the latter is afforded an irregular rotation, a table and connections with
said shaft A for intermittently rotating said table, cutters mounted upon said table
and having connections with said shaft. whereby the former are simultaneously
reciprocated slowly in their cutting operation, and rapidly in their return movement.
19. The combination in a milling machine, of holders and means for rotating the
same, clutch mechanism interposed in the driving connection and adapted to be
normally held in operative engagement, a device for retaining said clutch out of
such engagement, automatic trip mechanism interposed between said retaining
device and the holders aforesaid, whereby the clutch operated by the movement"
of the holders.
20. The combination with the rotary table and its driving mechanism, of clutch
mechanism interposed in said driving mechanism, a spring actuated lever whereby
said clutch is operated, means for engagement with said lever, whereby the same is
held to lock the clutch, automatic safety mechanism operated by the movement of
the table for releasing the engagement of said lever.
21. The combination with the rotary table and its driving mechanism, of a clutch
interposed in said driving mechanism, a lever for operating said clutch, holders
journaled in the rotatable table, means whereby said holders and their work are
rigidly held with relation to the table, an automatic safety device interposed between
said holders and the operating lever, whereby the latter is operated to disengage the
clutch in case of imperfect registration of the holders with said safety device.
22. The combination with the rotary table and driving mechanism of a milling
machine, of a clutch interposed therein, consisting of a disk 16 secured to the shaft,
engaging blocks adjacent to said disk, a movable shank fitted in a bore of the shaft,
toggle connections between said blocks and movable shank, a spring actuated lever
connected to the shank, means for engaging said lever and holding it against the
action of its spring, automatic safety trip mechanism operated by the movement.
of the table, whereby the lever is released to engage the clutch.
23. In a milling machine of the class described, the combination with the rotary
table, holders carried thereby, a star wheel secured to said holders, a clutch interposed
in the driving mechanism, a rod 164 operatively connected with the lever of the
clutch mechanism and whereby the same is disengaged, a block Q splined to said
shaft, an arm to engage said block and operate its rod, connections between the
star wheel of the holder and said rod, whereby the block is disengaged therefrom.
24. The combination in a milling machine, of holders journaled in the rotatable
table thereof, means for clamping work to said holders, a driving shaft and con-
nections thereof with driven shaft A, an arm on said driven shaft adapted to engage
and operate said holders in a manner to release said work with each rotation
of the table.
25. The combination in a milling machine, of holders journaled in the rotary table
thereof, means for clamping work to said holders, a driving shaft and connections
with driven shaft A, an arm on said driven shaft adapted to engage and operate said
holders in a manner to release said work, means for removing said work from said
holders, means for resetting said holders with relation to the table aforesaid and to
receive additional work to be milled.
26. The combination in a milling machine, of holders journaled in the rotary table
thereof, means for clamping work to said holders, a driving shaft and connections
with driven shaft A, an arm on said driven shaft adapted to operate said holders to
release said work, a movable ring fitted in the frame, a cam actuated bell crank
lever 60 pivoted to said ring and adapted to operate the holders in a manner to reset
the same to receive additional work, substantially as described.
27. In a milling machine, the combination in a work removing attachment, of a

page_text: frame, a vertical shaft journaled therein, a cam upon said shaft, connections between
said cam and a vertical rod, whereby the latter is given a reciprocating movement,
connections between said rod and the gripping head whereby said gripping head is
given a vertically reciprocating movement, connections between said vertical shaft
and said gripping head, for imparting thereto a rotary movement.
28. In a milling machine, the combination in a work removing attachment, of a
vertical driving shaft 107, connections thereof with the gripping head, whereby the
same is afforded a vertically reciprocating movement, a cam 120 upon said shaft,
a segment operatively connected with said cam for imparting to the former a
reciprocating movement, connections between said segment and the gripping head
for imparting thereto a reciprocating rotary movement, means whereby the jaws of
said head are opened and closed by said reciprocating movement, substantially
as described.
29. In a milling machine, the combination in a work removing attachment, of a
driving shaft, connections thereof with the gripping bead whereby the same is
operated to detach work from the machine, of a cam 144 upon said shaft, an arm E
pivoted to the frame and operated by said cam, in a manner to receive the work
from the gripping head, and remove the same from the machine.
30. In a milling machine, the combination in a work removing attachment, of the
driving shaft, connections thereof with the gripping head, whereby the same is
operated to remove the hubs from their holders, a cam upon said shaft, connections
thereof with the laterally swinging arm bearing a receptacle to receive the work,
means for tilting said receptacle in a manner to drop the work therefrom, when said
arm is in its extreme position.
31. The combination with a milling machine of a work removing attachment,
consisting in part of a spindle P, means for imparting thereto a rotary and vertical
movement, a gripping head carried by said spindle and provided with a pair of jaws,
means for opening and closing said jaws, by the initial rotary movements of said
spindle.
32. The combination with a milling machine of a work removing attachment,
consisting in part of the spindle P, a gripping head carried by said spindle and
provided with a pair of jaws, means for adjusting said jaws to accommodate different
sizes of work, connections of said jaws with the spindle, whereby they are operated
by the rotary movements of said spindle.
Dated this 9th day of February 1807