Year: 1894

page_text: Date of Application, 12th June, 1894-Accepted, 2nd Mar., 1895
Figure 4 is a vertical section on the line uu of Fig. 1 looking to the re
Figure 5 is a sectional view of detached parts on the line y y of Fig. 4, some of
the parts being in elevation.
Figure 6 is a vertical section of parts thereof on the line n n of Fig. 7.
Figure 7 is a vertical section on the linear of Fig. 1, some of the parts being
omitted.
Figure 8 is a vertical section on the line ww of Fig. 1,
Figure 9 is a vertical section on the liness of Fig. 7.
Figure 10 is a vertical section on the liner of Fig. 1.
Figure 11 is a detached side elevation of the clutch and worm wheel, and --
Figure 12 is a central vertical section of the same on the line o o of Fig. 10.
A designates the driving shaft having loosely mounted upon it a worm 13 which
is provided with a clutch mechanism hereinafter described for connecting and
disconnecting it to and from said shaft. Said shaft is also provided at one end
with a worm 14 which engages the worm gear 15 and drives the cam shaft B.
Said shaft A is also provided with a beveled gear 16 which engages and drives a
like gear 17 on the second driving shaft C. The cam shaft B is also provided
with a beveled gear 18 engaging a like beveled gear 19 on the second cam shaft D.
20 designates a chute or hopper in which I stack a series of nut blanks, and
opposite the opening at one side of said hopper is an intermittingly rotating head E
mounted upon the shaft F. This head is provided with several sets of jaws of
which the middle jaw 21 is rigidly fixed on said head in a radial position with a
✓ shaped end facing outwardly so that when it stops in front of the hopper as
shown in Fig. 3, the V shaped end is in proper position to receive the advanced
angular corner of one of the hexagonal nut blanks. The jaw 22 is also fixed in the
head and its end is parallel to a radial line of said head, while its side edges by
which it is held and guided for adjustment are so inclined to said end face that the
outer corner thereof forms an angle of sixty degrees. The moving jaw 23 is of the
same shape and hung upon a swinging arm 24 immediately opposite the jaw 22 and
the mechanism hereinafter described is such that this movable jaw is held away
from the fixed jaw 22 at a time when the jaws are immediately in front of the
bottom nut blank in the hopper. On the opposite side of the hopper is a slide or
conveyor 25, the outer end of which is connected by a pin and slot connection to a
rocking arm or lever 26. This lever has attached to it a roller projection 27, Fig. 3,
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page_text: which is carried on an adjustable arm 28 pivoted to said lever 26 and made
adjustable to change the position of the roller projection 27 by means of the set
screw 29. Said roller projection is acted upon by the cam 30 on the cam shaft 13
so as to move said conveyor and force the bottom nut blank from the hopper in
between the jaws on the hend. This lever 26 is moved in the reverse direction by
the spring 86 after it is released by the cam 30 Transversely through the head É
are cam shafts each carrying at one end a cam 31, Fig. 3, at the end nearest the
movable jaw, while its opposite end carries the rocker arm 32 as shown on the other
side of said head in Fig. 4. The slide 33, Fig. 4, is arranged in suitable ways.in
the frame connected by a pin and slot connection with the lever 333, which-lever is
acted upon by the cam 34 on the cam shaft B to move the slide 33 against one end
of the rocker arm 32 and rock the cam 31 for forcing the movable jaw upon the
nut blank. This cam is so shaped that when the jaw is closed the pressing point
of the cam is so nearly radial as to make said cam retain its grip until it is
withdrawn by force. When the cam 34 disengages said lever, the spring 35,
Figs. 3 and 4, returns it to its normal position. A stationary backer or table 37
lies immediately by the side of the jaws that are thus presented to the hopper.
The drill spindle 38 is now advanced to drill a hole in the nut blank. This
drill spindle is best shown in Fig. 9. A lever 39 is pivoted to the frame by
one end, while its upper end carries a shipper 40 for connecting it with the
drill spindle and its lever is acted upon by the cam 41 on the cam shaft D for
drilling a hole through the blank. The drill spindle is moved back again by
means of a lever 42 actuated by a spring 43, Fig. 1, to force said lever 42
against the lever 39. In addition to the drill spindle and the parts thus
described for operating it, I employ a guide or pick off 43* which is mounted
upon a slide 44 in the frame (see Figs. 1 and 9) and actuated in one direction
by the cam 45 of the cam shaft B acting on the lever 46 which lies between
said cam and guide, and in the opposite direction by means of the spring 47,
Fig. 1, whereby said guide or pick off is firmly pressed on the nut under the
influence of said cam until the drill is well started after which the guide or
pick off is removed out of the way of the nut by means of the spring 47, but
still leaving it in a position to act as a pick off when the drill withdraws. Its
first action is that of a guide to start the nut in its proper position in the head,
then to hold the nut and guide the drill at its start, and lastly to act as a
pick off when the drill retreats. It is evident that its first action would be the
same if the adjacent drill spindle was not supplied with a drill. The cam 30
nets to hold the conveyor against the nut during the drilling operation.
48 desiguates a clutch lever or latch having a lateral projecting arm 49 which is
operated upon by means of the projection or cam arm 50 on the shaft D at each
revolution of said shaft to withdraw this latch from the projecting part of the
clutch pin 51. As in ordinary clutches of this class, the spring 52 moves said
clutch pin longitudinally to engage a lug or projection 53, Fig. 12, in the hub or
collar 54 rigidly secured to the shaft D. This clutch pin passes through the hub
of the worm 13, whereby said worm is temporarily connected with the shaft A and
carried one revolution whenever said pin is released from the clutch latch 48 and
then disconnected and stopped at the end of one revolution as in an ordinary power
*press. In thus revolving the worm 13, it acts upon the pin wheel 55 for imparting
one quarter of a revolution to the shaft F and its head E, thereby bringing the
nut from the point in front of the drill upwardly between the stationary backer 56
and the side dressing tool and spindle 57. As arranged this dressing tool is for
dressing the rounded side of the nut, or as it is called in shop parlance, crowning
the nut. This dressing spindle 57 is provided with an ordinary shipper 58 by
which it is connected to one end of the lever 59 for being actuated by the cam 60
to move the dressing spindle forward, while a spring 61; Fig. 1, moves this dressing
spindle in the return direction. The clutch of the worm is now again thrown into
motion to revolve the head another one quarter of a revolution and to stop it,
thereby carrying the nut to a point between the movable backer 62, Figs. 1-and 6,

page_text: and the dressing tool and spindle 63, Figs. 1 and 2. This dressing spindle 63 is in
like manner connected by means of a shipper to a lever 64 which is operated to
press the dressing spindle forward by means of the cam 65 on the shaft B and
returned by means of the spring 66, Fig. 1. The movable backer 62 is connected
by a slide 633 with the cam 644 of the shaft D for moving this slide and backer
into its position against the nut, while said slide and backer are withdrawn by
means of the spring 655 as shown in full lines in Fig. 1 and broken lines in Fig. 6.
By the means before described the intermittingly revolving head is carried another
one quarter of a revolution and the nut which we are following stopped between
the second movable backer 67, Figs. 2 and 6, on the slide 633 before described, and
the tap 68 on the sliding spindle 69. This spindle is connected by means of an
ordinary shipper to the lever 70, Fig. 2, which lever is connected by means of a
link or bar 71 with the lever 72, one end of said lever being operated upon by the
yielding cam 73 of the shaft D to move the spindle and tap forward for pressing it
into the nut. This threaded portion of the tap is made larger than its shank so
that the nut may run over the body of the tap upon said shank. At the proper
time, the rigid cam 74 on the shaft D engages the second arm 75 of the lever 72
and thereby moves the tap and its spindle back out of the way of the head leaving
the nut on the shank of the tap.
It should be noted that the movable backers and
two spindles are upon one side of the head while the stationary backer and other.
two spindles are on the opposite side of said head so that the nut is operated upon
from opposite sides.
Although I have followed but one nut through the machine, each of the
operations which have described is performed at a different point in the
revolution of the head so that after the head has made one revolution these
operations are simultaneously being performed at different points on the head.
When the nut is brought in position in front of the tap before the tapping is quite
complete, the lever 76, Figs. 3 and 4, is acted upon by the cam 77 of the shalt B
to press its end up against one end of the rocker arm 32 for rocking said arm and
the connected cam 31, so as to release the pressure of the movable jaw upon the
nut and permit the nut to be taken upon the shank of the tap. This lever 76 is
returned by means of the spring 78.
The slide 33 before described acts upon one end of the rocker arm 32 to move the
cam for closing the jaws while the lever 76 acts upon the opposite end of said rocker
arm to move the cam for releasing the jaws. As shown the end of the slide comes
in contact with the end of the screw 90 of the rocker arm 32 but said screw when
once adjusted practically becomes a part of said arm.
Upon the shaft D there is a cam 79 which acts upon one end of an angle lever 80
to depress the lever 81 and withdraw the locking arm 82 from one of the notches 83
in the pin wheel 55 (see Fig. 7). The head is given its motion at a time when
this locking arm is withdrawn and as the lever 80 is released by this cam, and the
head completes each quarter revolution the spring 84 lifts the lever 81 and locking
arm 82 to lock the pin wheel and head in place during the operations that are
performed on the nuts while the head is at rest.
The spindles 38 and 57 are rotated by means of the gear wheel 87 on the shaft C
and connecting gearing clearly shown in Figs. 1, 2, 3 and 8 while the spindles 63
and 69 are driven by the gear wheel 88 on the same shaft and connecting gearing
as shown in Figs. 1, 2 and 4 but the particular means for giving rotary motion to
these spindles is not material to my invention.
The swinging arms 24 that carry the movable jaws 23 are forced towards the
cams 31 by the springs 89, Fig. 3, and all of the jaws for carrying the nuts in the
head are made adjustable by means of screws as will readily be understood without
further explanation by an inspection of Fig. 3.
While I have described my machine as arranged for drilling, facing and tapping
the nuts, it is evident that the machine may be used for facing and tapping punched
nuts or previously drilled nuts, if desired, the other operations remaining unchanged,
or it may be used for facing alone, and therefore after showing and describing the

page_text: Construction and mode or operation or my machine, I wish it to be understood
that the parts or combinations pointed out in any one of the several claims are not
necessarily dependent upon the specific construction of those parts which are not
particularly pointed out in the same claim.
The finish or shape of the nuts may be varied at pleasure by supplying the
various spindles with different tools.
Having now particularly described and ascertained the nature of my said inven-
ticn, and in what manner the same is to be performed, I declare that what I
claim is;
1. The combination of the intermittingly revolving head a series of nut holding
jaws mounted on said head, the hopper, the conveyor 25, the cam for holding the
nut conveyed by said conveyor to said jaws, a backer covering one broad side of
the nut between said jaws during their period of rest in front of said conveyor
and a tool spindle on that side of the nut which is opposite said backer for
operating on the nut while thus held, substantially as described and for the purpose
specified.
.
2. The holding jaws 21, 22 and 23, the middle one of which has a V shaped end
while the other jaws are arranged at an angle of sixty degrees to the middle
longitudinal line of said middle jaw and have their ends parallel thereto, substantially
as described and for the purpose specified.
3. The combination of the intermittingly revolving head, a series of nut holding
jaws mounted thereon, a hopper having a side opening which faces the edge of said
head, a reciprocating conveyor moving to and from the jaws in the edge of said
head and operating mechanism for said head conveyor, substantially as described
and for the purpose specified.
4. The combination of the head having holding jaws, the cam 31 for moving one of
said jaws,the rocker arm connected with said cam with its opposite ends projecting in
opposite directions therefrom and mechanisms for acting upon the opposite ends of
said rocker arm for moving said cam in reverse directions, substantially as described
and for the purpose specified.
5. The combination of the head, the nut holding jaws carried thereby, the
swinging arm pivoted by its inner end to said head and carrying the moving one of
said jaws at its outer end and the cam 31 mounted in said head between the fulcrum
of said arm and said moving jaw for pressing upon the body of said arm to close
the jaws and hold them closed while the head moves, substantially as described and
for the purpose specified.
6. The combination of the intermittingly revolving head having nut holding
jaws, the guide or pick off on one broad side of said heud, a backer upon the
opposite broad side of said head and operating mechanism, substantially as
described and for the purpose specified.
7. The combination of the intermittingly revolving head, a series of nut holding
jaws mounted on said head, the hopper, the conveyor 25, the cam for operating the
jaw for holding the nut conveyed by said conveyor to said jaws, a backer covering
one broad side of the nut between said jaws during their period of rest and a guide
as 43* on that side of the nut which is opposite said backer, substantially as described
and for the purpose specified.
8. The combination of the intermittingly revolving head, having nut holding
jaws a stationary backer upon one side of the nut as held in the jaws of said head, a
tool carrying spindle on the other side of said nut immediately opposite said backer,
a movable backer on the broad side of the head opposite said stationary backer,
a tool carrying spindle immediately opposite said movable backer and operating
mechanism, substantially as described and for the purpose specified.
9. The combination of the intermittingly revolving head having nut holding
jaws, the tapping spindle, a yielding cam and connecting devices for moving said
spindle longitudinally to its work and a rigid cam for giving the return motion
thereto, substantially as described and for the purpose specified.

page_text: 10. The combination of the intermittingly revolving head having nut holding
devices, a dressing tool and spindle on one side of the nut as held by said head for
dressing one broad side of said nut, the tapping spindle on the same side of said
nut, the movable backer opposite said tapping spindle and operating mechanism,
substantially as described and for the purpose specified.
11. The combination of the intermittingly revolving bead having nut holding
jaws, the drill spindle and guide or pick off on one broad side of said head, a backer
upon the opposite broad side and operating mechanism, substantially as described
and for the purpose specified.
12. The combination of the intermittingly revolving head having nut holding
jaws, mechanism for conveying nut blanks to the jaws in said head, dressing
tools and spindles on the opposite broad sides of said head, a tapping tool
and spindle for threading the hole in the nut and operating mechanism, the
arrangement and location being substantially as described and operating to
automatically receive and hold the blanks in the head and while so held present
them consecutively to said dressing and tapping tools for dressing their opposite
faces and threading their hole and then to automatically discharge them from said
head as set forth.
13. The combination of the head, a series of spindles for operating upon the
work held within said head, the driving shaft A, mechanism for moving said head,
clutch devices for connecting and disconnecting said head moving mechanism and
shaft, and mechanism for automatically tripping said clutch devices, substantially
as described and for the purpose specified.
Dated this 18th day of May 1894
GEORGE DUNHAM.
W. P. Thompson & Boult,
Agents for the Applicant.