IMPROVEMENTS OF STEEL TOOLS OR DIES
Year: 1885

page_text: I HENRY PATTERSON BOYD of Number 47 Cromwell Road, Fitzhugh in the
Town and County of the Town of Southampton Iron Manufacturer do hereby
declare the nature of my invention for IMPROVEMENTS OF STEEL TOOLS OR DIES
to be as follows:-
For improvements or inventions of Steel Tools or Dies, cast or otherwise, for
forging or rolling, when heated, Steel, Iron or Copper screws varying in size from
half an inch to two and a half inches in diameter and upwards, for use in the
construction of armour plates, Railway Chairs, flat bottomed rails, tram rails,
composite ships and general woodwork, also where wood and iron are combined.
The novelty of these Dies consists in being so formed that when striking the
iron, heated, elongates the space between the threads, whereby the fibro of the iron
and skin is unbroken, producing a screw much stronger and with greater holding
power than the ordinary cut Screw.
$
The improved construction of these dies consists in their being formed with
beaded sinkings and elongated in the spaces between the threads, by degrees. This
cannot be done by one die alone but three distinct dies, of different dimensions, are
necessary to produce the Screw-of whatever size of iron they are forged from-for
the construction of armour plates, tramways, railway chairs, flat bottomed rails,
composite ships, and all general wood work and iron combined.
D
30
100-

page_text: Improvements in Tools or Dies for Forging Screws.
I HENRY PATTERSON BOYD of Number 47 Cromwell Road, Fitzhugh in the
Town and County of the Town of Southampton Iron Manufacturer do hereby.
declare the nature of my invention for IMPROVEMENT OF TOOLS OR DIES FOR
FORGING SCREWS 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 steel tools or dies, cast or otherwise for
the manufacture of screws by hammering iron, steel, copper or other metal or alloy,
when heated; varying in size from half an inch to two and a half inches in
diameter and upwards for use in the construction of armor plates, railway chairs,
flat bottomed rails, tram rails, composite ships, and general woodwork, also when
wood and iron are combined.
In the Drawings herewith Fig. 1 represents a plan of the first Die with a beaded
sinking; Fig. 2 is a section of the same; Fig. 3 is a plan of the second Die with
a sharp line of sinking, Fig. 4 is a section of the same which forms the finishing
die of the screw. Fig. 5 is a plan of part of a finished screw.
For Example: In forging a half inch screw, assuming the distance apart of the
threads to be about equal to the diameter of the screw, the first Die must be one
eighth of an inch closer from centre to centre of thread than the second finishing
Die, to allow for elongation.
For a five eighth, three quarter, and seven eighth screw, the same rule applies as
to a half inch screw.
For a one inch screw, also assuming the distance apart of the threads to be about
equal to the diameter of the screw, the first Die must be three sixteenths of an
inch closer from centre to centre of thread than the second finishing Die.
For a one and one eighth inch screw and all sizes above, also assuming the
distance apart of the threads to be about equal to the diameter of the screw, the first
Die must be about one quarter of an inch closer from centre to centre of thread
than the second finishing Die.
Having now particularly described and ascertained the nature of my said
Invention, I may remark I do not confine myself to the exact form of the various
parts which I have shown, the same may be varied without in any way departing
from the principals on which my Invention of these Dies are based.
I declare that what I claim is:
(1.) That the novelty of these Dies consists in being so formed that when striking
the metals heated, elongates the space between the threads, whereby the fibre and
the skin of the Iron and other metals remain unbroken or cut, producing screws
much stronger and of greater holding power than the ordinary cut screwe.

page_text: (2.) The improved construction of these Dies consists in being so formed with
beaded sinkings elongates the space between the threads by degrees, about equal
to the diameter of the screw.
(3.) Two distinct dies are necessary to produce a screw of whatever size of Iron
or other metals they are forged from, (this cannot be done with one Die only)
They are for the construction of Armour Plates, Tramways, Railway Chairs, Flat
Bottom Rails, Composite Ships, and all general Wood and Ironwork combined.
Dated this 11th dev of March 1886
HENRY P. BOYD.