IMPROVEMENTS IN THE MANUFACTURE PROVISIONAL SPFICATION
Year: 1881

page_text: LETTERS PATENT to Jonathan Grimshaw, of Leeds, in the County of York,
a partner in the Firm of Josiah Grimshaw, of the same Place, Cut Nail
Manufacturer, for an Invention of "IMPROVEMENTS IN THE MANUFACTURE
PROVISIONAL SPECIFICATION left by the said Jonathan Grimshaw at the
Office of the Commissioners of Patents on the 24th December 1881.
JONATHAN GRIMSHAW of Leeds in the County of York, a partner in the Firm
of Josiah Grimshaw of the same Place, Cut Nail Manufacturer. "IMPROVEMENTS
IN THE MANUFACTURE OF CUT, WIRE AND WROUGHT NAILS."
My improvements in the manufacture of cut nails consist in the application of
electricity for heating the screed prior to its being cut in the nail cutting machine.
For this purpose I employ a machine such as that known as "Elmore's" electro
dynamo machine I apply the electrodes of this machine at the end of the screed to
be cut. On the electrodes being brought in contact with the metal the electro
dynamo machine commences its work thereon through the electrodes and causes
the end to become red hot after which the nail is cut off by the machine in the
ordinary way and the screed fed forward for the next nail. The electro dynamo
machine is brought into operation automatically from some convenient moving
part of the nail cutting machine.
In cutting the shank of wire nails I leave sufficient of the wire to form the next
head so that to the shank there is always a piece to form the head attached. As
each form is cut from the wire a pair of grippers which form the electrodes of the
electro dynamo machine are brought forward, these sieze that part of the nail
which is required for the head and then carry it forward to a compressing die, whilst
carrying it the electro dynamo machine commences to operate through the electrode
grippers causing the nail to become red hot and on arriving at the compressing die
072

page_text: the nail is released and dropped into it to be pressed into form. The electro
dynamo machine is brought into operation automatically, only during the passing
of the electrodes with the nail to the compressers and the required movement to
the grippers is imparted from the ordinary machine employed for cutting the
wires. I apply the electrodes with the electro dynamo machine for heating wire 5
for pointing and heading iron wire nails of all descriptions.
I also employ the electro dynamo machine to heat the metal employed for
manufacturing "wrought" nails. The heating operation being effected through the
medium of electrodes.
In all the above arrangements the electrodes are shaped to suit the form peculiar 1
to different kinds of nails.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Jonathan Grimshaw in the Great Seal Patent Office on the 24th June
1882.
JONATHAN GRIMSHAW of Leeds in the County of York, a partner in the Firm
of Josiah Grimshaw of the same Place, Cut Nail Manufacturer. "IMPROVEMENTS
IN THE MANUFACTURE OF CUT, WIRE, AND WROUGHT NAILS."
My improvements in the manufacture of cut nails consist in the application of
electricity for heating the screed prior to its being cut in the nail cutting machine.
For this purpose I employ a machine such as that known as "Elmore's" electro-
dynamo machine.
I apply the electrodes of this machine at the end of the screed to be be cut. On
the electrodes being brought in contact with the metal the electro-dynamo machine
commences its work thereon through the electrodes and causes the end to become
red hot after which the nail is cut off by the machine in the ordinary way and the
screed fed forward for the next nail. The electro-dynamo machine is brought into
operation automatically from some convenient moving part of the machine.
As
In cutting the shank off the wire nails I leave sufficient of the wire to form the next
head so that to the shank there is always a piece to form the head attached.
each form is cut from the wire a pair of grippers which from the electrodes of the
electro-dynamo machine are brought forward these seize that part of the nail
which is required for the head and then carry it forward to a compressing die,
whilst carrying it the electro-dynamo machine commences to operate through the
electrode grippers causing the nail to become red hot and on arriving at the com-
pressing die the nail is released and dropped into it to be pressed into form. The
electro-dynamo machine is brought into operation automatically, only during the
passing of the electrodes with the nail to the compressors and the required
movement is imparted to the grippers from the ordinary machine employed for
cutting the wires. I apply the electrodes with the electro-dynamo machine for
heating wire for pointing and heading iron wire nails of all descriptions.
I also employ the electro-dynamo machine to heat the metal employed for
manufacturing wrought nails, the heating operation being effected through the
medium of electrodes.
In all the above arrangements the electrodes are shaped to suit the form peculiar
to different kinds of nails, such as all kinds of joiners, boot and shoe, upholsterers,
horse shoes, and various other kinds of nails.
And in order that my Invention may be more completely understood reference is
given to the accompanying Drawings and to the letters and marks thereon.
DESCRIPTION OF DRAWINGS.
Figs. 1, 2, and 3 are respectively front elevation, side elevation and cross section
of wire nail cutting machine. Fig. 4 represents the application of the clectrodes of
an electro-dynamo machine to the screeds in ordinary cut nail machines.
In Fig. 41 represents the screed from which the nails are to be cut on the
ordinary cut nail machine. Close to the cutting or shearing tools the screed 1 is
passed between two metal pieces or rollers 2 and 21 forming the electrodes with
which it is kept in contact. The arms 3 and 31 carrying the rollers 2 and 2' are
fixed in bearings 4 electrically insulated from the nail cutting machine, and are
connected by the wires 5 and 5¹ (held by the binding screws 6) with the electrodes
of an electro-dynamo machine. The electric current passes between the rollers 2
and 2 across the end of the screed 1, causing it to become red hot and thus
facilitate the cutting and heading of the nails.

page_text: In Figs. 1 2 and 3 a is the framework of the machine on which is fitted so as to
work freely the sliding piece or bar b which carries the heading tool for forming
the head. On the framework a also are applied the sliding pieces c and c' in
these are applied the cutting tools d and d for shearing off the wire to length.
On the radial arm e are provided the grippers f which are adjustable and carried
by the holders g and g¹ these holders being attached to the radial arm e by
ordinary means and through these is imparted at suitable times the required
movement for closing the grippers f upon the wire for the purpose of carrying
it after being cutt off to the dies h which are directly under the heading tool h²
for the purpose of forming the head. The operation of opening and closing the
grippers fis effected by small cams i actuated by tappet arrangement.
The to and fro motion of the grippers f is transmitted through the radial arm e
from the crank k by means of the bar and rods m and n. The shearing tools d
and d¹ are operated through their sliding pieces c and c¹ motion being transmitted
to them from the grooved cams o and p through the levers q and r. For the
purpose of withdrawing the nail after the head has been formed I provide the
rod & mounted in adjustable bearings on the shaft t. To this rods a radial
movement is given through the shaft t actuated by the cam u such motion being
transmitted by the levers and v' and the rod w. The lever is also employed
for imparting the required movement to the heading dies h. The heading tool h¹
may be adjusted in a lateral direction by the screws x. The heading dies / may
be adjusted in a vertical direction by the screw y.
The wire is fed to the cutting tools & and d from the drum z between guide
rollers 7 and end of the lever 8 to which the required intermittent reciprocating
-movemeut-is-imparted-through-the-lappet-rod-9-from-the-tappet-on-the-boss-of-the-
crank. I employ the checking arrangement 10 as shewn, to prevent the wire
slipping back during the cutting operation.
The stamping head is raised by the cam 11 and falls by its own weight or
when preferred is forced down by a spring arrangement.
In order to form the grippers finto electrodes for the purpose of heating the
wire whilst it is being carried from the shearing tools d and d¹ to the heading
tool h I couple to them the wires 12 and 13 of an electro-dynamo machine being
careful that they are electrically insulated from the other parts of the machine.
The electric current passes between the grippers f and through the end of the nail
to be formed into the head causing it to become red hot thus facilitating the
heading and stamping of the nail.
In some cases I dispense with electricity and form the head whilst the metal is
cold.
Having now described the nature of my said Inventions and particularized_the
same by details which answer well in practice I would have it understood that I do
not confine myself to the exact details setforth what I do claim is:
The application of electricity to ordinary cut nail machinery substantially as aud
for the purpose herein setforth.
The arrangement construction and application of the various parts forming the
machine for cutting and heading wire nails and the application of electricity to the
same substantially as and for the purpose herein set-forth.
In witness whereof I the said Jonathan Grimshaw have hereunto set my
hand and seal this Twenty first day of June in the year of our Lord One
thousand eight hundred and eighty two.
JONATHAN GRIMSHAW. (L.S.)