Improved Machine for Jumping the Heads of Nails..
Year: 1888

page_text: Improved Machine for Jumping the Heads of Nails..
I, HENRY HARINGTON LEIGH, Fel. Inst. P.A., Assoc. M. Inst. C.E., practising as
Phillips & Leigh, at No. 22, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Engineer and Patent Agent, do hereby declare the nature of this
invention to be as follows :-
:-
This invention relates to an improved machine for making nails, and more especially
to an improved machine for jumping the heads of horse nails, and its objects are to
provide mechanisms for feeding and holding the nail-blank during the jumping process,
and releasing it automatically afterwards.
The nail blanks are held between jaws carried by intermittently rotating discs, and
discharged into the open jaws through a tube from which they drop periodically one
by one. The jumping-die is attached to a slide which is actuated by a cam on the
driving shaft, so as to move the die in the direction of the radius of the disc carrying
the jaws for holding the blank rigidly during the jumping process.
One of the said rotating discs is keyed on an intermittently rotating shaft, and
provided on its face with the halves of a number of radially arranged jaws, and a
projection entering into a slot of an annular disc or ring carrying the corresponding
halves. This ring is supported by a bearing jointed to the frame of the machine,
and as it engages with the disc fastened on the rotating shaft as aforesaid, the said
ring will partake of the rotating motion of the latter, and of the oscillating movement
of said bearing jointed to the frame of the machine.
This bearing is caused to press the loose ring with its jaws against the disc fixed
to the shaft just opposite the jumping-die by means of a toggle-device. The axis of
the revolving ring is somewhat inclined to the axis of rotation of the fixed disc, thus
causing the former to bear against the disc on that side where the jumping die
is arranged, and to produce a certain play between the ring and the disc on the
opposite side.

page_text: The object of this arrangement is to hold the nail-blank rigidly between the jaws
during the jumping process, and to release it automatically after the head has been
formed on the blank.
The jumping die, which is attached to a slide guided in the bed plate of the machine,
is moved forward and backward by means of a cam on the main shaft, and it will form
at each revolution of the latter one nail-head. To accomplish this, the shaft imparting
rotating motion to the clamping device heretofore described is periodically turned by
means of a ratchet-wheel-and-pawl device, the periods of which depend upon the
number of jaws radially arranged upon the clamping discs.
Close to the side of the slide carrying the jumping die is arranged another sliding-
piece which receives a to-and-fro motion, but in an opposite direction to the jumping
die, by a suitably formed cam on the main shaft. By this sliding piece, the toggle
device above referred to is actuated so as to cause the jaws to close tightly and to
hold the blank rigidly when opposite the jumping die. To secure the jaws in their
position exactly opposite the jumping die, the disc fastened to the intermittently
rotating shaft is provided with notches into which engages a weighted pawl rocking
on a shaft underneath the bed-plate of the machine, thus locking the disc, but releasing
the latter after each operation by the motion of the said toggle, thereby enabling the
fixed disc and the co-operating annular disc to rotate and to offer a new blank to the
jumping die for heading.
To allow only one nail blank at a time to drop out of the feeding tube and to enter
into the open jaws, the undermost blank is caught by a finger of a swinging arm
actuated by a projection on the crank-disc, transmitting motion' to the shaft carrying
the clamping device.

page_text: Improved machine for Jumping the feats of NaTIS.
I, HENRY HARINGTON LEIGH, Fel. Inst. P.A., Assoc. M. Inst. C.E., practising as
Phillips & Leigh, of No. 22, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Engineer and Patent Agent, 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 an improved machine for making nails; and more
especially to an improved machine for jumping the heads of horse nails. Its objects
are to provide mechanisms for feeding and holding the nail-blank during the jumping
process, and releasing it automatically afterwards.
attain these objects by the mechanisms illustrated in the accompanying drawings
in which
Fig. 1 is a vertical section of the machino on the line -y of Fig. 3.
Fig. 2 is a side elevation of the same, partly in section.
Fig. 3 is a plan of the machine, partly in section.
Fig. 4 represents the mechanism for feeding the nail-blanks.
Figs 5 and 6 illustrate the mechanism for receiving the nail-blanks and jumping
the heads.
Fig. 7 is a vertical section of the mechanism, detached from the machine, for
closing the clamping device in which the nail-blank is held for jumping the head."
Similar letters refer to similar parts throughout the several figures.
The nail blanks are held between jaws carried by intermittently rotating discs, and
discharged into the open jaws through a tube through which the blanks drops, one by
one, by their own weight. The jumping die is attached to a slide which is actuated
by a cam on the driving shaft of the machine, so as to move the die in the direction of
the radius of the discs carrying the jaws for holding the blank rigidly during the
jumping process.
The disc a is keyed on an intermittently rotating shaft W, and is provided on its
face with the halves of a number of radially arranged jaws k, and a slot / into which
engages a projection or key of an annular disc or ring b (Figs. 5 and 6) carrying
the corresponding half-jaws k. The ring bis supported by a bearing c, pivotted by
means of a bolt d to the frame of the machine; and as it engages with the disc a
fastened on the rotating shaft W as aforesaid, the said ring b will partake of the
rotating motion of the latter, and of the oscillating movement of the bearing c on the
bolt d.
This bearing c is caused to press the loose ring b with its jaws k¹ towards the disc a
fixed to the shaft W just opposite to the jumping die p by means of a toggle q r r.
The axis of the revolving ring 6 is somewhat inclined to the axis of rotation of the
fixed disc a, thus causing the former b to bear against the disc a on that side where
the jumping die p is arranged, and to produce a certain play between the ring b and
the disc a on the opposite side.

page_text: The object of this arrangement is to hold the nail-blank rigidly between the jaws k
and during the jumping process, and to release it automatically after the head has
been formed on the blank.
The jumping die p, which is attached to a slide p³ guided on the bed plate of the
machine, receives the required reciprocating motion by means of cams m¹ and m³ on
the main shaft w, and it will form at each revolution of the latter the head of one nail.
To accomplish this, the shaft W, imparting rotating motion to the clamping device
heretofore described, is periodically turned by means of a ratchet wheel / and pawl
mechanism, the periods of which depend upon the number of jaws k k¹ radially arranged
upon the clamping discs a and b. Within the hollow space of the slide p are arranged
two anti-friction rollers m and m² (Figs. 1 and 3); the first one bearing against a
cam m¹ on the main shaft w by means of which the slide p is moved very rapidly
towards the jaws kk1 of the clamping device, while the other roller m³ bears against
a second cam m³ which is formed so as to just bear against the shaft w, when the
highest point of the cam m³ comes in contact with the roller m (Fig. 1), and to then
ascend as the slope of the cam m¹ declines, so that the slide pl is always compulsorily
guided and instantaneously withdrawn as soon as the roller m has passed over the
highest point of the cam m¹.
Close to the slide p' carrying the jumping die is arranged another slide-piece q¹
(Figs. 3 and 7) which receives a to-and-fro motion in a similar manner as, but in an
opposite direction to, the jumping die p, by means of the cams n¹ and n³ on the
shaft w.
The cam n acts upon the antifriction roller n, while the other cam 21³ bears
against the roller n², so that the slide q' is drawn back at the same moment in which
the other slide p¹ is moved forward towards the nail-blank in the clamping device. To
this sliding piece 9' is attached the toggle grrl above referred to, which is actuated so
as to cause the jaws k¹ to close tightly, and to hold the blank rigidly when opposite
the jumping die. This toggle arrangement consists of the rod 9 attached to the
slide q', and the two kidney-shapod links and (Fig. 3). The latter, which are
adapted to break in case of an overcharging of the machine and to be easily replaced
in case of accident, transmit the to-and-fro motion of the rod to the ring or bearing c
as the link is supported by means of a projection of the bed-plate, and bears with
its other end against the head of the rod y, while the second link ¹ engages with the
head of the rod q and with a projection d¹ of the ring c. In consequence of the
inclination of the links and to one another, the angle of which increases as soon as
the rod 9. is withdrawn by the cam n¹, the bearing c, and consequently the ring b with
its jaws k, is pressed with great force against the disc a with jaws k just at that moment
at which the die p begins to move towards the nail blank, which is thus held rigidly
during the jumping process.
2"
7°
To secure the jaws in their position exactly opposite the jumping die p, the disc a
fastened to the intermittently rotating shaft W is provided with notches a¹ (Figs. 5
and 7) into which engages a weighted pawl t (Figs. 1, 2, and 7) rocking on a shaft t
underneath the bed plate of the machine, thus locking the disc a. To the shaft t¹ is,
also keyed a forked arm bent around and engaging with the rod q.(Figs. 3 and 7).
Each time the head of a nail has been formed, the side q' and the toggle rod y move towards
the shaft W, thereby touching the arm t and causing the oscillation of the shaft t'
and of the pawl t which releases the disc a, thereby enabling the latter and the
co-operating annular disc b to further rotate and to offer a new blank to the jumping
die to be headed. This intermittently rotating motion of the discs a and b is
imparted to the shaft W by means of ratchet wheel h, loose crank h¹, click h³,
connecting rod, and the crank disc i at the end of the rotating main driving shaft w.
By this periodical rotation of the discs a and b, the finished nail will be turned
downward, and released from the jaws, that it may drop into a shoot, or receptacle,
underneath the machine; for the adhesion of the nail to the jaws is overcome by
means of a pivotted arm o which forces the nail out of the jaws either by the action of
its own weight, or of a spring.
The stamped nail-blanks are fed into the jaws. k k¹ by means of a tube e (Fig. 4)
arranged radially towards the disc a. To allow only one nail-blank to drop out of

page_text: on
the feeding-tube, and to enter the open jaws kk¹, the bottom blank is caught by a
finger g of a swinging arm gl pivotted at g and actuated by a projection
the crank disc i against which the said arm g² permanently bears under the action
of a spring f. As illustrated in Fig. 3, the said crank disc i, transmitting motion
to the shaft carrying the clamping device, is keyed on the main driving shaft w; and
causes, by means of its projection at each revolution of the shaft, the finger g to
release the nail-blank it previously held in check, and the next moment to prevent the
next blank from dropping out of the tube.
The driving pulley s forming the fly-wheel of the machine carries a friction
coupling that may be disengaged from the main shaft w by means of a treadle v.
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 I
claim is :-
1. A machine for jumping the heads of nails, in which the intermittently rotating
discs a and b, carrying the jaws for holding the nail-blanks, are inclined to each other
in such a manner, that during the rotation of the discs, the gradual closing and opening
of the jaws is automatically effected substantially as set forth.
2. In a machine for jumping the heads of nails, the combination of the disc a
keyed on the shaft W and carrying the jaws k, with the annular disc b carrying
corresponding jaws and supported by the ring c to which oscillating motion is
imparted by the toggle qrr, substantially as specified.
3. In a machine for jumping the heads of nails having intermittently rotating
discs a and b carrying the jaws for holding the nail-blanks, the arrangement of the
links of the toggle in combination with the rod q the slide q' and the cams n¹ n'
of the driving shaft, substantially as and for the purpose set forth.
4. In a machine for jumping the heads of nails baving rotating jaws for holding
the nail blanks, the mechanism for periodically arresting and releasing the bottom
nail-blank in the feeding tube e, consisting of the angle lever g g', the crank disc i
with projection and the spring f, substantially as and for the purpose specified.
5. The manufacture of nails according to which the heads thereof are formed by
means of a machine acting substantially in the manner as specified and claimed.
Dated this 25th day of January 1889.