Improvements in Forged Screws and in Tools or Dies for the Manu- facture of same, such Screws being Specially Applicable as Fastenings for Railway Chairs, Planking in Composite and Armoured Ships of War, Railway Wagons, Bridges, and all similar Purposes.
Year: 1889

page_text: Late of Application, 28th Aug.. 1889-Accepted, 14th Dec.,
1889
COMPLETE SPECIFICATION.
Improvements in Forged Screws and in Tools or Dies for the Manu-
facture of same, such Screws being Specially Applicable as
Fastenings for Railway Chairs, Planking in Composite and
Armoured Ships of War, Railway Wagons, Bridges, and all
similar Purposes.
I ANDREW LILLEY of Hardwick Villa Dollings Road, Woolston, in the county of
Hampshire, Smith, 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 relates to Improved Forged Screws manufactured from iron, steel,
copper, or other metal or alloy, and to improved Tools or Dies for the manufacture
of improved screws.
I take and provide a steel, or other metal Tool, or die (made in two parts) and
so recessed that when a heated "blank" bolt, made of any of the materials before
mentioned, is inserted into-and passed through the said Tool or Die with a rotary
motion, the Tool or Die being hammered or pressed during the operation of passing
the bolt through, we have as the result the screw thread formed upon the bolt.
I also provide another recess in the steel or other metal Tool, or Die, so formed
that when a heated "blank" bolt made of any of the materials before mentioned, is
inserted into the recess, and rotated, while the tool is being hammered or pressed,
we have as the result a finely shaped point formed upon the said bolt, such point
may be made of a conical, flat, or other approved form.
It is remarked that only one tool or die (made in two parts) is required to form and
complete the screw thread upon the blank bolt, and that it is only necessary to pass
the blank bolt through the tool once to form and complete the screw thread upon the
blank bolt.
In order to enable my invention to be fully understood I will proceed to describe
the same by means of and with reference to the accompanying drawings.
Figure 1, shews in plan my improved Tool or Die for forming the screw thread,
and the point upon blank bolts.
The recess for forming the screw thread on blank bolts is shown in plan at A. A.
and the recess for forming the point on same is shewn in plan at B. B.
Figure 2, shews a sectional elevation through A. A. of my improved Tool, or Die,
for forming the screw thread upon blank bolts.
Figure 3, shews a sectional elevation through B. B. of my improved Tool, or Die,
for pointing bolts.
Figure 4, is a front elevation of Figure 1.
Figure 5, represents my improved screw bolt with a pointed end.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I would remark that I
am aware that screws have been previously formed by forging the thread by means
of two or more sets of dies used in succession and that I do not claim at large any
such method and what I claim is
1st. The particular application, and improved method, of manufacturing screw
bolts, specially applicable as fastenings for Railway Chairs, planking in Composite,
and Armoured Ships of War, Railway Waggons, Bridges, and all similar purposes,

page_text: and the particular form, and finish, of said screw bolts, more especially the points of
same, by means of which it is possible, and convenient, to screw the bolts into soft
wood, without its being necessary to first bore holes in the wood to receive them.
2nd. That I claim as my invention the peculiar form, or configuration, of the tool,
or die, by means of which a screw thread is formed upon blank bolts, while using
only one tool or die (made in two parts) for the operation, whereas hitherto in the
manufacture of all screw bolts under similar circumstances, two, or more, Tools or
Dies (each made in two parts) have always been used.
3rd. That I claim as my invention the tool, or die, by means of which bolts are
pointed in manner herein before described and illustrated in the accompanying
drawings.
Dated this 27th day of August 1889
HERBERT P. BLAKE,
20, Laura Place, Southampton, Agent for the Applicant.