A Machine for Finishing Nuts.
Year: 1890

page_text: Date of Application, 11th Feb., 1890-Accepted, 15th Mar., 1890
COMPLETE SPECIFICATION.
A Machine for Finishing Nuts.
I, Crones DUNDAM, of Unionville, in the County of Hartford, and State of
Connecticut, United States of America, Manufacturer, 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 :-
My invention relates to improvements in Machines for Finishing Nuts, and the
objects of my improvement are simplicity of construction and general efficiency and
convenience in operation.
In the
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Connecticut, United States of America, Manufacturer, 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:-
My invention relates to improvements in Machines for Finishing Nuts, and the
objects of my improvement are simplicity of construction and general efficiency and
convenience in operation.
In the accompanying drawings
Figure 1 is a front elevation of my machine.
Figure 2 is a side elevation thereof.
Figure 3 is a detached view on a reduced scale showing a portion of the frame of
the machine, one of the cams and the lever operated thereby, the crank shaft being
in vertical section.
Figure 4 is a horizontal section of said machine on the line x-x of figure 1.
Figure 5 is a vertical section of detached portions thereof on the line y-y of
figure 4, the slide and its punches being shown in elevation.
Figure 6 is a vertical section of parts thereof on line z-z of figure 5.
Figure 7 is a horizontal sectional view of parts of the machine corresponding with
fig. 4, excepting that some of the parts have been removed.
Figure 8 is a vertical section of parts thereof on line w-w of fig. 4, and-
Figure 9 is an enlarged vertical section of detached parts in the same plane as
fig. 6, but with the parts in a different position.
A few of the reference characters where the parts are crowded have been omitted
from figure 1.
The machine in its general form resembles an ordinary power press. A designates
the frame, B the crank shaft, C the punch slide driven thereby, D the driving gear
mounted on said crank shaft, said gear being driven by the gear E on the inain
shaft F which is provided with driving pulleys G and H. These parts are of
ordinary construction and other ordinary equivalent parts may be substituted for
them.
In the punch slide I arrange four punches and within the bed of the press
underneath them four dies. Beginning at the left hand side of the drawing the
first one of these is the crowning die 10 and its punch 11, the flattening die and
punch 12 and 13, the central hole die and punch 14 and 15, and the trimming die
and punch 16 and 17. Upon the front and rear of these dies there are yielding
gauges or guides 18, 19, 20, 21, 22, and 23. The gauge 20 is made integral with
its spring shank 24 which is secured to the die-bed J. This gauge is set with its
under face a little above the face of the crowning die so that said gauge may yield
a little in a downward direction, that is, towards the die-bed, while said gauge
also has the capacity of yielding in an edgewise direction. The gauge 21 back of
the flattening die 12 is mounted upon a slide 25 which is pressed upon by a spring 26
to keep it towards the front, its forward motion being limited and adjusted by means
of the set screw 27. This slide is guided in suitable ways in the cap-plate K. and
the set screw 27 bears against the rear edge of said cap-plate. The gauge 22 is
arranged and adjusted in like manner in the upper side of the cap-plate upon the
slide 28, said slide being provided with a spring 29 and set-screw 30. This slide_28
is held down by the picker-plate 31 through which the punch 15 works. The
gauge 23 works in a similar manner in guides formed in the upper side of the
cap-plate K and it is held in place by a supplemental cap 32. This gauge 23 is
formed as an integral part of a bar or slide and it is pressed forwardly by means of
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page_text: .
he spiral spring 33, its forward motion being limited and adjusted by means of the
set screw 34 figs. 4 and 7. The gauges for the front side of the dies have their
spring pressure arranged to draw them backwardly so that the springs force the
gauges toward each other. The gauge 18 which confronts the gauges 20 and 21 is
mounted upon the two slides 35, 35 fitted in suitable ways in the bed J which
slides are pressed backwardly by means of the springs 36, their backward motion
being limited by means of the bolts 37 around which the springs 36 are coiled.
The gauge 19 is mounted upon a like slide 38 and held and adjusted in like manner
by means of spring 39 and bolt 40. The front gauge 41 in front of the trimming.
die 16 is a yielding gauge mounted upon a rocking arm 42 pivoted at 43 so as to.
be held in its position for gauging by gravity. The rocking motion of this gauge
and that of the rocking arm 42 is limited and adjusted by means of the screw 44
which strikes a stop 45 that is secured stationarily upon the frame of the machine..
Immediately underneath the gauge 23 in suitable guides I arrange the clearing
slide 46 which slides from the position in the rear of the trimming die 16 illustrated
in fig. 7, to a point forward of said die as illustrated in fig. 9. Motion is imparted
to said slide by means of the rocking arm 47 on the rock shaft 48 at the rear of the
machine, which shaft is moved in one direction by means of the lever 49, fulcrumed
on the frame of the machine, with its lower end bearing against the rocking arm 50
on said shaft, and its upper end being operated upon by the cam 51 ou the crank
shaft B, the contacting end of said lever with said cam being preferably provided
with a roller 52. The rock-shaft is moved in the opposite direction by means of the
spring 53, fig. 4. The clearing slide 46 has rigidly connected with its front end a
cam or projection 54 which as said slide moves forwardly strikes the gauge 41 and
swings it up out of the way as shown in fig. 9. The crowning die 10 is provided
with a knock-out pin 55 whose upward motion is limited and adjusted by means of
the nut 56, figs. 1 and 5, and it is pressed into its uppermost position by means of
the spring 57.
Upon the front part of the machine, moving in suitable ways, I arrange a transverse
slide M. This slide M is reciprocated by means of-beveled slides 58, 59, the ends of
which bear upon a roller 60 mounted
operated by means of the cams 61, 62, and said slide M. Said beveled slides are
gear wheels 63, 63, the latter of which is
on the crank shaft, which mechanism is not specifically a part. of this invention, and
any other mechanism for reciprocating said slide M to impart to it the same movements
I consider an equivalent for this slide operating mechanism, for the purposes of the
present invention. This slide M bears an adjustable carrying finger 64, fig. 4, which
finger is in the form of an angle arm, the operating member of which is adapted
to reciprocate between the yielding gauges 18 and 20. It is held and adjusted in its
position by means of the set screws 65 fig. 4. I also provide the slide M with a finger
slide N, having three adjustable carrying fingers 66, the same being set a distance
apart, measuring from their forward or right hand edges, equal to the distance from the
centre of one of the dies to the centre of the next succeeding die. The gauges 18 and 19
are of less thickness than the nuts to be operated upon so that the fingers 66, which
extend over the top of said gauges, at times, may engage the edges of the nuts at a
point above said gauges. This finger slide is adapted to be reciprocated transversely to
the movement of the slide M. It is actuated by means of the grooved cam 67 on the
crank shaft B, the lever 68 fulcrumed upon the frame of the machine, the pitman 69,
rocking arm 70, rock-shaft 71, and rocking arm 72. This latter arm is slotted and is
connected with the finger slide N by means of a rod 73 passing through the slot in said
arm, whereby said arm and slide are connected in such manner that the finger slide
may move laterally with the slide M, while the rocking arm 72 has no lateral
movement. The fingers 66 are adjusted longitudinally by being slotted and held down
by bolts 74 which pass through the slots in said fingers, and they are further secured and
adjusted by means of the set screws 75 which bear upon the rear ends of said fingers.
Said fingers may also be provided with means for adjusting them laterally, but this is
not essential, as they should always have a given relation to each other and to
the distance between the dies in a lateral direction. .

page_text: The nuts for being finished by this machine may be produced in any ordinary
manner. I prefer to arrange them one upon the other in a suitable hopper so as to
remove the nuts from the bottom of the hopper one by one as in well known machines
for operating upon blanks, but such hopper is not essential as the nuts may be placed
within the machine one at a time by hand. At a time when the slide M is at or near
the left hand limit of its movement, the finger slide at its rearmost position, over the
space between the gauges, and when the punch slide is elevated, (the parts being so
timed as to come in these respective positions,) a nut is dropped in between the
yielding gauges 18 and 20 at the point illustrated by the nut 76, fig. 4. The gauges. 18
and 20 should be so arranged as to be slightly farther apart at this point than at the
crowning die so that the nut may readily fall into position between them, and then be
pinched or pressed upon by said gauges as it is carried to the dies. The parts are so
timed that the slide M next move to the right when the finger 64 pushes the nut to a
position over the crowning die, the gauges being so set that both of them press upon the
opposite elges of the nut with friction enough to hold it in place. The finger slide.
then withdraws from over the space between the gauges into the position illustrated in
fig. 6 and the punch slide descends to bring the punch 11 down upon the nut to force it
into the crowning die 10. The slide M with the fingers 66 draw out of the way of the
dies and nut, moves to the left again to the extent of its motion, the punch slide is
elevated and the finger slide again operates to carry the fingers into the position
shown in fig. 4, when the left hand finger 66 will be carried into a position on the
left hand side of the nut within or over the crowning die. The ordinary knock-out
pin 55 releases the nut from said crowning die. The next movement of the slide. M to
the right carries another nut as before described and also carries a crowned nut to
the flattening die and punch 12 and 13, when the movements of the machine before
described are repeated, another nut is crowned and the one previously crowned
is flattened. The two first of the fingers 66, by what may be called their four-four motion
come into a position upon the left hand sides of the respective nuts so operated
upon. Another nut is supplied and the machine makes the same movements
as before, crowning and flattening the succeeding nuts and punching or trimming
the central hole by means of the die and punch 14 and 15. A repetition of these
movements, repeats the operations before described, bring the right hand finger
back of the nut last punched and brings the most advanced nut to the operation of the
trimming die and punch 16 and 17 which trim the edges of the nut. The pressure of
the gauges before the nut reaches the trimming die should be such as to hold the nuts
firmly in place while the fingers are moving by them, to the left, to obtain a fresh hold.
After the nut has been trimmed the clearing slide 46 moves forwardly, lifts the gauge 41
out of the way and pushes the scrap from the top of the trimming die into the passage 77
through which it may pass out of the machine. The clearing slide and gauge 41 then
return to their former positions and the operations are repeated indefinitely so long as
the supply of nuts is kept up. The nut is held firmly enough between the
spring pressed gauge 23 and gauge 41 to retain it in position for being acted upon by
the trimming die and punch.
In some cases it may not be desirable to trim the central hole in the nut and in such
case the die and punch 14 and 15 and right hand finger may be omitted and
the trimming die and punch 16 and 17 occupy the position of said die and
punch 14 and 15 without making any other changes in the machine, the operations
being precisely the same as before described with the exception of punching the
central hole. Even when the machine is adapted for use with the central hole
punching die and punch its operation may be omitted if desired by merely
removing the punch 15 from the punch slide, the only resultant change being that
no operation will be performed on the nut when it stops over the die 14.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. In a machine for finishing nuts, the combination of a crowning die and punch,

page_text: a flattening die and punch and a trimming die and punch arranged in succession at
given distances from each other, and carrying devices, to present the nuts successively
to said dies and punches, substantially as specified.
2. In a machine for finishing nuts, the combination of a crowning die and punch, a
flattening die and punch, a central hole trimming die and punch and an edge trimming
die and punch arranged in succession at given distances from each other, and carrying
devices to present the nuts successively to said dies and punches, substantially as
specified.
3. The combination of a successive series of dies and punches, the gauges yielding
under spring pressure for bearing upon opposite edges of the nut, a series of carrying
fingers for moving the nuts along to said series of dies between said gauges, and
operating mechanism, substantially as described and for the purpose specified.
4. The combination of a die and punch for operating upon a nut, as for instance
12 and 13, the gauge 19 upon one side of said die, its slide 35, spring 36 and bolt 37,
the gauge 21 upon the opposite side of said die, its slide 25, spring 26 and
adjusting screw 27, all substantially as described and for the purpose specified.
5. The combination of the edge trimming die and punch 16 and 17, gauge 23,
swinging gauge 41, the clearing slide 46, having the projection or cam 54 for
acting on said swinging gauge, and mechanism for operating said clearing slide,
substantially as described and for the purpose specified.
6. The combination of a series of dies and punches, a series of front and rear gauges,
the gauges in front of said dies being of less thickness than the nuts to be operated
upon, and a series of carrying fingers arranged to operate over the top of said front
gauges, substantially as described and for the purpose specified.
7. The combination of a series of dies and punches, the slide M, the finger slide N
mounted on said slide M and moving at right angles thereto, a series of fingers 66 on
said finger slide and mechanism for operating said slides whereby the finger slide
moves in one direction at one end of the movement of the slide M and in the
opposite direction at the other end of the movement of said slide M, substantially
as specified.
8. The combination of a series of dies and punches, the yielding gauges for bearing
upon opposite edges of the nut, the slide M, the finger 64 rigidly mounted thereon,
the finger slide N having fingers 66 and mounted to slide transversely to the
movement of the slide M, and operating mechanism, substantially as described and
for the purpose specified.
9. In a nut finishing machine, the combination of the slide M, the finger slide N
mounted thereon and provided with the rod 73, mechanism for reciprocating the
slide M, the slotted rocking arm 72 and its operating mechanisın, said rod 73
passing through the slot of said rocking arm, substantially as described and for the
purpose specified.
10. In a nut machine, the combination of the clearing slide having cam or
projection 54, the swinging gauge 41 mounted on the rocking arm 42, the adjusting
screw 44 and a stationary stop 45, substantially as described and for the purpose
specified.
Dated this 11th day of February 1890.