Improvements in and connected with Horse Shoe Nail Blank Cutting: Machinery, and in the Production of Horse Shoe Nail Blanks.
Year: 1896

page_text: Date of Application, 14th Sept., 1896-Accepted, 14th Nov., 1896
COMPLETE SPECIFICATION.
Improvements in and connected with Horse Shoe Nail Blank Cutting:
Machinery, and in the Production of Horse Shoe Nail Blanks.
We, ALESSANDRO BANNWART, and OSCAR BANNWART, Engineers and Manufacturers.
of Pineralo, Italy, 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 improvements in and connected with horse shoe nail
blank cutting machinery and in the production of the blanks the object being to
provide an effective form of horse shoe nail blank cutting machine the purpose of
which is to cut the blanks out of a flat ribbon or strip of metal having swollen sides
with a very small waste of material.
The apparatus is illustrated in the accompanying drawing in which
Fig. 1 is a front elevation of the machine.
Fig. 2 is a side elevation. Fig. 3 is a side and front elevation respectively of a
part being a detail of the machine.
Fig. 4 is an elevation of the bottom die showing the metal strip. Fig. 5 is an
elevation of the upper cutters and punch with the head in which same are held.
Fig. 6 is an underside view of Fig. 5.
Fig. 7 is an end elevation of the cutters and holding head showing the bottom
die and metal strip thereon.
Fig. 8 is a side and end elevation respectively of the punch.
Fig. 9 is a face view and side elevation respectively of the cutter for producing.
a short blank.
Fig. 10 is a face view and side elevation respectively of the cutter for producing
a long blank.
Fig. 11 is a section and plan respectively of one form of metal strip having some
of the blanks cut therefrom:
Fig. 12 is a plan and Fig. 12 is a side elevation of a short blank.
Fig. 13 is a plan and Fig. 13A a side elevation respectively of a long blank.
Fig. 14 is a plan and Fig. 14 a side elevation of the waste piece left in cutting
the blanks illustrated from the strip.
Fig. 15 is a plan and Fig. 154 is a side elevation of the finished nail produced
from the blank shown in Fig. 12.
Fig. 16 is a plan of the waste piece produced in making the finished nail shown
in Fig. 15 such waste piece being produced by an operation outside the present
invention and being shewn only to illustrate the small amount of waste which exists
in producing a finished nail from the blank illustrated.
Fig. 17 is a similar waste piece produced from the finished nail shown in
Fig. 18 and
Fig. 18 is a plan and Fig. 18 a side elevation of a finished nail produced from
the blank shown in Fig. 13.
A is a casting in the shape of a table. B a frame secured thereto and carrying
upon a shaft Ca friction pulley and clutch D of some convenient form and hiving
an operating lever E. An eccentric F is secured upon shaft C and is provided
with a handled screw F¹ to adjust the strap F2 of same. This eccentric hrs a nose F
on its strap which acts in a slot in a slide G which reciprocates between uides H.
Such slide G carries the tool holder Q on which are held the cutters L L and a
punch L" which operate in connection with a die M carried by the table A.

page_text: The die M is held in position tightly by a block N and screws N' (Fig. 1).
The metal strip X is introduced into the machine between two vertical rollers O
carried by a bracket 0 on a moveable carriage P between the die M and the
cutters LL', the cutting being effected by the pressure of the tool holder carrying
the cutters as it is forced down by the nose F3 of the eccentric F.
The carriage P has projections Ron which is pivoted a jaw R' having an
extension or arm S to which is attached four coil springs T attached to the upper
part of a frame U secured to the carriage P. The shaft C is provided with a
spur wheel V which gears with a spur wheel V' upon a counter shaft C', which is
suitably supported. An eccentric W also upon shaft C₁ bears upon a roller W¹
mounted in the forked end of a rod Y and is guided by an eye Y¹ secured to
the frame B.
A coil spring Z is attached to an arm Z¹ (secured to the eye Y') and to a
spring Z secured to one end of a lever a pivoted to the frame.
The other end of the lever a carries an arm (Figs. 1, 2, 3) pivoted thereto
such arm having a roller on a fixed arm thereof and a roller on an arm
which is pivoted to the main arm at as shown. The arm b with its rollers
passes into a recess formed by a projection of the carriage P and a projection d
of the frame B.
The slide G carries an arin e bolted to it said arm carrying at its end in an
adjustable fork a roller f which bears upon the arm S of jaw R'. Two coil
springs attached to the frame A at one end and to the projection of the
carriage P at the other draw the carriage backwards when the arm and its
connected parts which act as a wedge leave the recess or space between the
projection and projection d.
The carriage P has a projection and frame A two projections ¹h with
adjusting screws whose purpose is to limit the travel of carriage P. A plate
spring is fixed to frame A to keep the metal strip in the proper position.
The strip X is held by the jaw R' and at each revolution of shaft C the
arm is raised through fever a, rod Y, roller W', eccentric W, spar wheels V V
and rapidly enters the recess or space described and forces the carriage forward
for a limited distance whereupon the tool holder Q comes down and two blanks
are cut by the cutters hereafter described until the forward movement of the
carriage P and arm S causes roller f' to come in contact with it thus depressing it and
opening the jaw R the continued movement raising the slide G with the tool
holder after which as the arm retreats from the recess the springs g draw the
carriage backward.
The arm S roller farm e and slide G are raised by the springs T which when
the arm S has moved sufficiently to the left are able to close the jaw R again.
apou the strip which is again forced forward with the carriage.
A strong compressed air draught is preferably employed to blow away from the
cutters and dies into the waste pieces of iron produced in the cutting of the blanks.
Such blanks fall through a recess in the dies and under the frame while the waste
pieces are collected in a suitable receptacle.
The cutters and dies are shown in Figs. 4, 5, 6 and 7. They consist of a short
cutter L adapted to cut a blank as in Figs. 12, 124, a atter 12 adapted to cut a long
blank as in Figs. 13, 13, and a compressing punch L". The three tools are held in
the frame by a screw m which passes through a block Q and abuts against a
block n' shaped to the contour of the side of the cutter L' a shaped block n' being
interposed between this and the cutter L and a shaped block n being on the further
side of cutter L the whole being pressed against a plate so that they are held
firmly in the holder Q.
The punch L" is held in the block n' by means of a screw r.
The die M may be of the ordinary construction and has recesses or openings
corresponding to the two cutters above. The punch is intermediate of the cutters so
that when a short nail blank is being cut the point of the next or long nail blink or
portion of the bar which is to become a nail blank is compressed and squeezed by the

page_text: punch L and the blank is subsequently produced and separated by the cutter L' the
squeezing operation taking place on the swelled portion h on the strip X so that
the material there is flattened somewhat and is placed more in a condition to be drawn
to a long tapered point.
The die M may have a groove t to receive the strip as shown in Figs. 4 and 7.
The knife L adapted for cutting the short blank Fig. 12 is shown in Fig. 9. The
knife L' shown in Fig. 10 is adapted to cut the nail shown in Fig. 13, it is provided
at the point end with a recess or groove for the reception of the point of the blank
which after being slightly flattened by the punch when brought under the cutter has
a thickening at the extreme end which it is desirable should not be further crushed
by the pressure of the cutter such groove also preventing the nail from moving side-
ways during the cutting.
The cutters might both be in the shape of the blank shown in Fig. 12 or both
in that shown in Fig. 13 and of different sizes according to the shape of the metal
strip.
The cutters have a slight inclination on the cutting edge.
The punch L" also has a groove u for the reception of the thickening at the
extreme end of the blank which it produces when it squeezes the swelled portion to
slightly flatten it.
The metal strip X as shown in Fig. 11 has the swelling / adapted to form the head
of a short nail blank and also the point of a longer nail blank, the head of which is
formed by the swelling h. These swelled portions may be the same on both sides of
the strip or of different shapes but one swelled portion even if of the same shape as
the other must be of smaller dimensions on the side which is to form the thickened
portion for the point.
In Fig. 11 it will be seen that one blank is cut across the strip from one swelled
edge to about the base of the opposite swelled edge to produce a short nail while the
other row is cut across the full width of the strip. The waste piece of metal between
the two nail blanks is shown by the cross hatching in Fig. 11 and in Figs. 14
and 14 the latter representing the piece as distorted by the stamping of the blanks.
By producing a stretched end to the longer nail from the swelled portion by the
process described of flattening such part h prior to cutting the blank a considerable
saving of material is effected and a narrower metal strip may be used. Figs. 16
and 17 shew the small piece of waste as stated which is all that is produced in the
subsequent processes of pointing and completing the nails from the blanks.
As the strip is fed into the guide groovest of the die M and the tool holder Q
moved downwards a nail blank is cut each by cutters L and L' the latter cutting
a blank with a pressed or squeezed point which has just been produced by the
punch L".
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:-
1. In horse shoe nail blank cutting machinery of the class described the arrange-
ment and construction of parts for moving the carriage and feeding the metal strip
substantially as described.
2. Cutting nail blanks from a metal strip having swelled edges in the manner
substantially as described and illustrated in Fig. 11.
3. In horse shoe nail blank machinery the construction and arrangement of cutters
and punch substantially as and for the purpose described.
4. In the production of horse shoe nail blanks' a metal strip having swelled edges
of the same or different shapes said edge being unequal in dimensions substantially as
and for the purpose described.
5. A horse shoe nail blank cut from the whole width of a metal strip having a
swelled edge to produce a thickened end to the blank substantially as and for the
purpose described.

page_text: 6. A horse shoe nail produced from a blank constructed substantially as described
the preceding claim.
7. In horse shoe nail blank machinery the arrangement of an air blast near the die
for removing the waste material substantially as described.
Dated the 14th day of September 1896.
For the Applicants,
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent....