Improvements in Nailing Machines for Boots and Shoes.
Year: 1899

page_text: Improvements in Nailing Machines for Boots and Shoes.
I, WILLIAM HENRY DORMAN, of the Green Hall, Stafford, Engineer, do hereby
declare the nature of this invention to be as follows:-
These improvements are introduced for the purpose of enabling a machine
originally constructed for driving ordinary round rivets to deal with a new form
of rectangular nail.
This new nail has a parallel body of rectangular cross section and a flat rect-
angular head which overhangs the body on two sides only and is level with the
body on the remaining two sides, the overhang of the head being, however,
never formed on the narrower sides of the nail. The point is formed by cham-
fering the four angles of the body to the central line of the nail.
In a machine constructed to work with the ordinary round rivets, the rivets
are placed in a revolving box and lifted by scoops from which they fall upon an
inclined shoot which they enter point downwards and down which they slide sup-
ported by their heads to a separator which enters between the lowermost rivet
and its next neighbour in the space under the heads and between the bodies of
the two rivets and while pushing the lowermost rivet into the throat so that it
may be driven into the shoe by the driver-prevents the descent of the next
one until the separator retires. A revolving clearing wheel having teeth above
and on one side of the shoot clears away such rivets as fall wrongly upon the
shoot.
For the purpose of enabling the machine to work with the above mentioned
new form of nail, I introduce the following improvements.
I provide a special clearing wheel having the teeth over the shoot cut in the
opposite direction to the ordinary and with other teeth on each side of the shoot
alternately opposite a centre tooth. The clearing wheel, preferably has half as
many teeth around it on each side of the shoot as around the centre of the wheel
though they may be less than half and every side tooth is opposite a space on the
other side. The centre teeth clear away nails which fall on and lie longitudinally
over the slit of the shoot-a position which does not arise with the ordinary
round rivets and the side teeth clear away nails which fall and lie across the
shoot. The wheel is placed well within the nail box so as to afford ample clear-
ance around it and the bevel edges of the shoot are extended below the wheel.
The shoot sides support the nails by their heads which as before stated pro-
ject beyond the nail body on two sides only so that within the vertical slit of
the shoot all the flat sides of the nails come into close contact each with the
next all the way down the shoot. At the bottom end of the shoot the last nail
has to be separated from its next neighbour above and delivered into the throat
of the machine.
To accomplish this separation I form the separator so that its point enters
between the two nail points where an opening is afforded and not as heretofore
beneath the nail heads as with the new form of nail there is no opening afforded

page_text: near the nail heads. The separator therefore first pushes the point of the nail
into the throat and then as the driver rises pushes the head of the nail in.
The nail head being rectangular I make a rectangular driver which I bevel
away slightly on one side near the end so as to form a guide for the side of the
nail in entering the throat. This bevelled side of the rising driver acts in con-
junction with the bevelled side of the advancing separator so that between them
they carry the nail sideways into the throat without allowing sufficient clearance
for the nail to turn into an improper position. The throat is rectangular and
provided with spring clips which open as the nail is driven down.
The aw point is ground to a shape similar to the point of the nail and the awl
guide is drilled with holes to suit different pitches of nail driving required the
guide also being easily removable for changing. In some cases the guide and
bar are so made that the awl is adjustable and may be set to any pitch.
I mount the edge gauge on a carrier which slides on the edge gauge bracket
and has an adjustable stop and screw to limit the forward movement of the edge
gauge. A screw is provided to clamp the carrier in any desired position on the
edge gauge bracket.
The edge gauge may also be moved forward or backward a small amount upon
the carrier by means of a sliding cam and handles the amount being regulated
by an adjustable stop and screw; a spring, friction washer and screw are pro-
vided to the cam.
This edge gauge is very similar to that described in the Specification of former
Letters Patent granted to G. F. Redfern No. 21936, A.D. 1891.
Dated this 4th day of September 1899
I, WILLIAM HENRY DORMAN, of the Green Hall, Stafford, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement;-
This invention relates to nailing machines for boots and shoes and has for its
object to enable machines of this class constructed for driving ordinary round
rivets to deal with a new form of rectangular nail.
To enable my invention to be fully understood I will describe it by reference
to the accompanying drawing, in which
Figure is a sectional front elevation of a portion of a nailing machine for
boots and shoes illustrating my improvements:
Figures 2 and are a plan and right hand side view respectively thereof with
a part removed:
Figure 4 is a section on the line 4-4 Figure 1:
Figure 4 is a face view of the clearing wheel hereinafter described:
Figure 5 is a left hand side view of the part of the machine containing the
throat through which the nails are driven into the boot or shoe:
Figures 6 to 15 are views of details hereinafter described.
The new nail which my improved machine is adapted to drive is illustrated in
Figures 6 and 7 which represent elevations at right angles to one another. This
nail has a parallel body a of rectangular cross section and a flat rectangular
head which overhangs the body on two sides only and is level with the body
on the remaining two sides, the overhang of the head being, however, never

page_text: formed on the narrower sides of the nail. The point is formed by chamfering the
four angles of the body to the central line of the nail in the manner clearly
shewn.
In a machine constructed to work with the. ordinary round rivets, the rivets
are placed in a revolving box and lifted by scoops whence they fall into an
inclined shoot which they enter point downwards and down which they slide,
supported by their heads, to a separator which enters between the lowermost
rivet and the next adjacent rivet in the space under the heads and between
the bodies of the two rivets, and while pushing the lowermost rivet into the throat
so that it may be driven into the shoe by the driver, prevents the descent of
the next one until the separator retires. A revolving clearing wheel having teeth
above and on one side of the shoot clears away such rivets as fall wrongly upon
the shoot.
According to my invention provide a special clearing wheel c, Figures 1, 4
and 4ª having the teeth d over the shoot e cut in the opposite direction to that of
the ordinary wheel and with other teeth f, g on each side of the shoot alternately
opposite a centre tooth d. This clearing wheel preferably has half as many teeth
around it on each side of the shoot as around the centre of the wheel though
they may be less than half and every side tooth is opposite a space on the other
side. The centre teeth d clear away nails which fall on and lie longitudinally
over the slit e¹ of the shoot, a position which does not arise with the ordinary
round rivets, and the side teeth f clear away nails which fall and lie across
the shoot.
The teeth are formed by cutting notches across the blank, then cutting a
central groove around so as to leave the central teeth shallow, then cutting
down every other high tooth around one edge so as to leave the teeth f and lastly
cutting down every alternate tooth on the other edge so as to leave the teeth g.
The wheel is mounted on the shaft e¹ and is placed well within the usual
nail box (not shewn) so as to afford ample clearance around the wheel and the
edges of the shoot are bevelled below the wheel as shewn, which revolves in the
direction of the arrow, Figure 1.
The shoot sides support the nails by their heads as clearly indicated in
Figure 4, each head, as before stated, projecting beyond the nail body on two
sides only so that within the vertical slit or channel e¹ of the shoot e all the flat
sides of the nails come into close contact each with the next all the way down
the shoot. At the bottom end of the shoot which is shewn in elevation and plan
in Figures 8 and 9 the last nail has to be separated from the next adjacent nail
above and delivered into the throat h of the machine. To accomplish this
separation I employ the separator i shewn detached in elevation and plan in
Figures 10 and 11 respectively. Formerly this separator was made with the
portion longer than the portion 22 so that the point was in advance and
separated the nails close under the heads first, the portion 22 entering last and
completing the separation. As, however, there is no opening afforded near the
nail heads I form the improved separator with the point in advance of the
point so that it enters between the points of the nails and separates them
before the portion enters. The separator, therefore, first pushes the point of
the nail and then the head of the nail into the throat h. The nail head b being
rectangular I employ a rectangular driver j which is shewn detached in Figure 12
which driver I bevel away slightly on one side near the end as at j¹ so as to
form a guide for the side of the nail in entering the throat h. This bevelled
side of the driver when rising acts in conjunction with the bevelled side of the
advancing separator so that between them as indicated in Figure 13 they carry
the nail sideways into the throat without allowing sufficient clearance for it to
turn into an improper position. The throat his rectangular and provided with
spring clips k, k which open as the nail is driven down into the boot or shoe.
Each clip, as shewn in side and end elevation respectively at Figures 14 and 15,
is provided with lugs 1, which form pivots engaging holes in the frame in

page_text: which the throat his formed.
each other.
m, m are springs for forcing the clips towards
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. In a boot and shoe nailing machine of the kind hereinbefore described a
clearing wheel having central and side rows of teeth constructed substantially
as described and for the purpose set forth.
1
2. In a boot and shoe nailing machine of the kind herein before described a
separator formed with the portion designed to enter between the points of the
nails to be separated longer than the part entering under the heads, substantially
as described.
3. In a boot and shoe nailing machine of the kind herein before described a nail
driver formed with a bevelled side, substantially as and for the purpose described.
4. In a boot and shoe-nailing machine of the kind herein before described the
combination of a nail separator and driver constructed and operating upon a nail,
substantially in the manner and for the purpose set forth.
5. The mechanism for feeding and driving nails for boot and shoe nailing
machines consisting of the parts combined, arranged and operating, substantially
as hereinbefore described and illustrated in the accompanying drawing.
Dated this 5th day of June 1900.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.