Improvements in or applicable to the Cutters of Shoe Nailing Machines.
Year: 1894

page_text: Date of Application, 13th Feb., 1894
Complete Specification Left, 8th Nov., 1894-Accepted, 15th Dec., 1894
.
PROVISIONAL SPECIFICATION.
Improvements in or applicable to the Cutters of Shoe Nailing
Machines.
I JONATHAN BOOTHMAN of 3 Oak Villa, Brideoak Street, Cheetham,
Manchester, Boot and Shoe Manufacturer, do hereby declare the nature of this
invention to be as follows:-
My said invention relates to improvements in the cutters of those shoe nailing
machines in which the nails are formed by being cut from a continuous length of
wire and pointed by the action of cutters the adjacent faces of which are set at
such an angle to each other that a portion of the parallel wire is severed slantwise
so as to leave the nail pointed.
The fixed cutter of such a machine has consisted heretofore of a single plate or
block of steel dovetailed or otherwise secured in the cutter box. The said fixed
cutter is formed with grooves or channels to receive the wire to allow the waste to
escape
and to enable the nail to be driven. Such a cutter plate presents.
considerable difficulties to the ready renewal of the cutting edge and soon becomes
completely worn out and has to be discarded.
According to my said invention I form the said cutter in sections, preferably
three. The side sections are cut away at their inner face adjacent to the centre
section in order to form two sides of the grooves or channels hereinbefore
mentioned. The third side of each groove is formed by the centre section which
is so shaped that its front face lies in the same plane as the side sections. One edge
of the end face of the centre section forms the cutting edge for pointing the nails
and when this has become blunt it is merely necessary to withdraw the centre
section regrind it and replace it.
The centre section is simply a prismatic bar and to sharpen it it is only necessary
to grind the front end or face.
Suitable means such as wedges set screws or other cramping devices are used for
securing the sections in position and to preserve the adjustment they may be
grooved or otherwise shaped so as to engage with each other and with the
cutter box.
Dated this 10th day of February 1894.
E. T. WHITELOW, A.M. Inst. C.E.,
70, Deansgate, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or applicable to the Outters of Shoe Nailing
Machines.
I JONATHAN BOOTHMAN of 3 Oak Villa, Brideoak Street, Cheetham,
Manchester, Boot and Shoe 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 said invention relates to improvements in the cutters of those shoe nailing
machines in which the nails are formed by being severed from a continuous length
of wire and pointed by the action of cutters the adjacent faces of which are set at
such an angle to each other that a portion of the parallel wire is severed slantwise
so as to leave the nail pointed.

page_text: In such a machine there is a fixed cutter having two grooves and opposite
thereto is a reciprocating cutter having a single groove. The stroke of the
reciprocating cutter (which is operated by a cam) is such that its groove is in
juxtaposition first with one groove and then with the other groove of the fixed
cutter. In one position the groove in the fixed cutter and that in the reciprocating
cutter together form a passage for the reception of the end of the continuous
length of wire. Part of the wire is held by the groove in the fixed cutter and
part by the groove in the sliding cutter. When the latter slides past the former it
takes with it the short length destined to form the nail (which is severed and
pointed by the cutting edges of the fixed cutter) and brings it to the second
groove of the fixed cutter through which works the driver to drive the shaped nail
into the work held underneath. The reciprocating cutter thus acts simply as a
holder and conveyor of the nail.
The fixed cutter of such a machine has consisted heretofore of a single plate or
block of steel dovetailed or otherwise secured in the cutter box or cutter holder.
The said fixed cutter is formed with grooves or channels to receive the wire to
allow the waste to escape and to enable the nail to be driven and when made in a
single piece it presents considerable difficulties to the ready renewal of the cutting
edge and soon becomes completely worn out and has to be discarded.
According to my said invention I form the said cutter in sections as hereinafter
described with reference to the accompanying drawings.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a sectional front elevation through the cutter box showing the acting
end of the fixed cutter as seen when the reciprocating or carrying cutter is removed.
A represents the continuous length of wire. B represents the driver.
Figure 2 is a sectional plan through -y of Figure 1 with the reciprocating
cutter in position to receive the wire from which the nail is to be cut.
Figure 3 is a transverse section through -y of Figure 2.
Figure 4 shows side elevation of the middle sections of the fixed cutter..
Figure 5 is a plan showing the mode I adopt of securing the tool or cutter in the
reciprocating cutter box.
In all the figures the same letters of reference refer to the same parts.
C is the cutter box which holds the fixed cutters and which is provided with a
through passage C¹ in which the reciprocating cutter bar D slides to and fro.
Referring first to the fixed cutter. The side sections a a are cut away at a¹ a¹
on their inner faces adjacent to the centre section b in order to form the two sides
of the grooves to receive the wire. The third side of each groove is formed by
the centre section b which is so set that its front face lies in the same plane as the
faces of the side sections. One edge 6' of the end face of the centre section forms
the cutting edge which points the nail as it is carried past the said cutting edge by
the travel of the reciprocating or carrying cutter. The centre section b is simply
a prismatic bar and to sharpen the cutting edge b' it is merely necessary to withdraw
it and grind the front edge or face.
The upper section c is a square bar the under edge c' of which acts as a cutting
edge to sever the length of wire destined to form the nail from the continuous
length of wire while the nail is being borne forward to the driving groove by the
stroke of the reciprocating or carrying cutter. To sharpen the cutting edge of
the section c it is merely necessary to displace it longitudinally by pushing it forwards
when a fresh length of the cutting edge comes into action. When all of one edge
is worn off the bar turned over a quarter turn presenting a fresh square edge. The
bar being square has four such edges which last a long time before the bar need be
replaced or re-ground.
The side sections a are preferably made double ended or reversible. The
grooves in the opposite ends are made of different sizes so that one set of side
Bections may be used for two sizes of wire.

page_text: As may be seen in plan in Figure 2 the side sections a are recessed into the cutter
box C. The centre section is made a good driving fit so that when driven up it
keys the side sections and prevents longitudinal or transverse displacement. The
fore end of the upper section c projects through a square hole in the front of the
cutter box. A pinching screw d passing through the bottom of the cutter box and
taking against the under side of the middle section b prevents the sections b and c
from shifting.
The present method of securing the grooved tool in the reciprocating cutter bar
is by fitting it accurately into a dovetailed groove. This however presents
obstacles to ready renewal.
I secure the grooved tool e in a recess undercut at e' by means of a nut e³ and
clamping screws. The nut is undercut at e¹ and as it bears with a square edge
at against the cutter holder the tightening of the screw e³ causes the nut e' to
securely clamp the tool in the bar.
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. A fixed cutter for a nail cutting and driving machine made in sections which
may be ground separately substantially as and for the purpose set forth.
2. In a fixed cutter for a nail cutting and driving machine the combination of
the two side sections a a each notched to form a groove for receiving the nail with
a removable centre section 6 substantially as and for the purpose set forth.
3. The combination of the side sections a a the centre section b and the top
section c the whole forming a fixed cutter for a wire nail cutting and driving
machine substantially as set forth.
4. A combination cutter for a nail cutting and driving machine having reversible
side sections provided with grooves at both ends for receiving two sizes of wire
substantially as set forth.
Dated 7th dow of November 1894.
E. T. WHITELOW, A.M. Inst. C.E.,
70, Deansgate, Manchester, Agent for the Applicant.