Improvements relating to the Manufacture of Nails.
Year: 1888

page_text: [Communicated from abroad by G. ANDREA CAVALLI, of San Mateo, County of San
Mateo, California, United States of America, Machinist.]
Improvements relating to the Manufacture of Nails.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 invention relates to improvements in Nails, Brads and other similar metal
fastenings for uniting together pieces of wood, leather, and other fabrics and substances
in the various arts and trades wherein driven fastenings are used.
The object of my invention is to produce a nail or fastening which shall possess the
qualities of driving well and of holding firmly in the substance into which it is
driven; also to provide a nail or fastening that is particularly adapted for leather-
work and for uniting together the soles and uppers of boots and shoes in the mann-
facture thereof.
To such ends and purposes my invention consist in the novel construction and
production of a nail or like fastening with a straight or cylindrical body having a
thread or projecting rib like a screw-thread running circumferentially around it, and
intersecting longitudinal ribs running from end to end or from head to point, as
hereinafter fully set forth.
The body of the nail or fastening is of the same thickness, and is preferably of
cylindrical form from end to end, excepting that the point is beveled or tapered to
facilitate driving. A projecting thread running spirally around the body is carried
with an uniform pitch from end to end, and intersecting this thread a number of
longitudinal ribs is formed from one end to the other with greater projection than the
circumferential thread so that the edge of each one of these ribs stands somewhat
beyond the outer edges of the thread.
These said ribs stand out radially from the body and are formed at equal distances
apart around it, so that the threaded surfaces of the nail is divided by the longitudinal
ribs into sections so to speak,

page_text: A head may be formed on one end of the body for driving in the case of nails for
wood, but for leather-work the head is not required and the nail will be made without
it. One end is chiseled-pointed or beveled to facilitate entering the material into
which the nail is driven.
In the accompanying drawing I have represented by way of example two forms
of nail or fastening constructed according to my invention, and also an arrangement
of revolving dies or rolls for indenting or pressing the thread and producing the
longitudinal ribs in a length of wire.
Figure I is a view somewhat magnified of my improved nail or fastening for
leather-work and similar use.
Figure II represents a nail for wood-work or with a head on one end.
Figure III is a cross-section through the nail.
Figure IV represents an arrangement of revolving dies or rolls for producing the
thread and ribs as before described in a length of wire.
The same letters of reference in the different figures are used to denote the same
parts in the nail or fastening.
A is the body of the nail, and a, a, the circumferential thread. B, B, are the
longitudinal ribs, and C, is the beveled end or point.
The nail represented in figure II has a head D, for driving into wood-work.
E, E, are the revolving dies as arranged for producing the thread around the body
and the ribs that run lengthwise. The space, X, that is left between the edge or rim
of one die and that of the next leaves that portion of the surface of the wire uncom-
pressed, as will be understood from figure IV of the drawing, so that when a piece or
strip of wire is run through the dies arranged in this manner the acting edges of the
dies indent or compress the metal between thein and form the thread, while the
portions of wire not acted on between the dies produce the longitudinal ribs.
The revolving dies are geared together and driven at uniform speed by suitable
mechanism, the arrangement of which will be evident to any mechanic, and does not
require special description. The number of dies to be used will depend upon the
number of ribs to be formed, three dies producing three ribs, as shown in figure IV,
and four dies producing four ribs. I do not confine myself to any particular number
of ribs, nor to any particular size of threads.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent I declare that what I claim is-
The herein described nail or fastening having circumferential thread, a, a, and
longitudinal ribs, B, B, intersecting and projecting somewhat beyond the said thread,
as shown.
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