Improvements in the Manufacture of "Dog Nails."
Year: 1892

page_text: Date of Application, 20th Sept., 1892
Complete Specification Left, 15th June, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of "Dog Nails."
We, CHARLES MARCH, Managing Director, and WILLIAM DICK, Foreman,
both of Clyde Nail Company, Ltd., Newton in the County of Lanark, do
hereby declare the nature of this invention to be as follows:-
*This invention has for its object to produce dog nails, commonly used in spiking
the chairs to the sleepers on railways and for other purposes in a more economical
method than has hitherto been effected, whilst at the same time a nail is obtained
which is easily drawn when required by the employment of any ordinary chisel
prise or lever as distinguished from the necessity of using specially manufactured
tools for that purpose.
The improved dog nail whilst it may be manufactured from flat plates or strips
as ordinarily rolled for nail making purposes can be with equal facility, and it is
preferred on the point of economy to, be conducted by the economical use of the
waste or sheared off strips or ends in the production of flat steel or malleable iron
plates and a feature of the invention is the peculiar formation which is given to
the blank subsequently to be formed into the finished nail. The nail can be made
in an ordinary cut nail making machine the punches, dies, gripper and header
being arranged to suit and in commencing with a new plate or strip a half blank is
cut off as usual and which is waste. This being effected the next operation of the
cutter produces a blank having the top of the head represented by a straight line
which is the edge of the plate or strip. The front edge of the head is represented
by a line which is at right angles to the top and from the lower termination of
that line another right angled line parallel to the top of the head or a curve meets
the body of the blank subsequently to be formed into the shank of the nail. From
the point of this juncture the line of the forward edge of the body of the blank is
in the form of a bevel or inclined plane for a certain distance throughout its length
after which it is straight to the end or point. From the back end of the head line
the edge of the blank extends at right angles to a desired distance from the point
from which distance it is bevelled to meet the straight line of the front edge.
This hevel is of equal or approximately of equal length with the bevel extending
from the head at the front edge so that the nail plate or strip being turned over
surface for surface after each blank is cut the line of inclination at the point of
one blank becomes the line of inclination from the head of the next blank and the
point of one blank being the terminal of the forward edge of the head of the next
no waste in cutting from edge to edge of the plate or strip occurs.
The blank so formed is carried down and by the action of the machine is
operated on to complete the shank, or the shank and point of the nail the surplus
metal represented by the inclined plane forward of the front of the head being
forced sidewards into the shank and subsequently, the blank being meantime
firmly held, the heading die comes into operation to cheese or form the head.
The head of the blank may be creased to any form desired, but it is a feature
of this invention so to crease it that a spiral projection or flange is formed at the
back by the insertion under which of any ordinary chisel point prise or lever the
dog nail may with great facility be drawn from its position the peculiar form of
blank affording facilities for that purpose.
Instead of leaving the top edge of the blank straight throughout that is to say

page_text: instead of its terminal points meeting the front and back edges at right angles in
some cases one or both edges of the top end may be bevelled or inclined.
Dated this Nineteenth day of September 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
Improvements in the Manufacture of "Dog Nails."
We, CHARLES MARCH, Managing Director, and WILLIAM DICK, Foreman,
both of Clyde Nail Company, Ltd., Newton in the County of Lanark, 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 has for its object to produce dog nails or spikes commonly used in
spiking the chairs or rails to the sleepers on railways and for other purposes in a
more economical method than has hitherto been effected, whilst at the same time a nail
is obtained which is easily drawn when required by the employment of any ordinary
chisel, prise or lever as distinguished from using specially manufactured tools for
that purpose.
The improved dog spike or nail whilst it may be manufactured from flat plates
or strips as ordinarily rolled for nail making purposes can be with facility, and it
is preferred on the point of economy to make it from the waste or sheared off strips
or ends in the production of flat steel or malleable iron plates and a feature of the
invention is the peculiar formation which is given to the blank subsequently to be
formed into the finished nail. The nail can be made in an ordinary cut nail making
machine the punches, dies, gripper and header being arranged to suit.
Figure 1 of the accompanying drawings is a diagram or plan illustrating the
method of cutting the blanks under our invention.
In commencing with a new plate or strip a waste piece a is cut off as usual and
this being effected the next operation of the cutter produces a blank having the
top of the head represented by a straight line which is the edge of the plate or
strip. The front edge cof the head is represented by a line which is at right angles
to the top and from the lower termination of that line another right angled line d
parallel to the top of the head or a curve meets the body of the blank subsequently
to be formed into the shank of the nail.
From the point of this junction the line e of the forward edge of the body of the
blank is in the form of a bevel or inclined plane for a certain distance throughout
its length after which it is straight to the end or point as at f. From the back end
of the head line the edge g of the blank extends at right angles to a desired distance
from the point from which distance it is bevelled as at h, to meet the straight line
of the front edge. This bevel is of equal or approximately of equal length with.
the bevel e extending from the head at the front edge so that the nail plate or strip
being turned over surface for surface after each blank is cut the line h of inclination
at the point of one blank is coincident with the line e of inclination from the head
of the next blank and the point of one blank being the terminal d of the forward
edge of the head of the next no waste in cutting from edge to edge of the plate or
strip occurs.
The blank so formed is carried down and by the action of the machine is operated
on to complete the shank, or the shank and point of the nail the surplus metal
represented by the inclined plane e forward of the front of the head being forced
sidewards into the shank and subsequently, the blank being meantime firmly held,
the heading die comes into operation to cheese or form the head.
The head of the blank may be creased to any form desired but it is a feature of
this invention so to crease it that a special projection or flange i is formed at the

page_text: back as shewn by Figures 2 and 3 of the drawings by the insertion under which of
any ordinary chisel point, prise or lever the dog nail or spike may with great
facility be drawn from its position the peculiar form of blank affording facilities for
the production of this flange.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be produced, we declare that what
we claim is:
--
1. For the manufacture of dog nails or spikes, blanks cut or formed as herein-
before described with reference to the drawings annexed.
2. Dog nails or spikes made from blanks cut or formed as hereinbefore described
said nails having each a flange or fin produced at the back of the head in the
process of manufacture as and for the purpose set forth.
Dated this 14th day of June 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.