Improvements in Tools for Forging Elongated Shot and Shell.
Year: 1890

page_text: Date of Application, 25th Jan., 1890
Complete Specification Left, 25th Oct., 1890-Accepted, 29th Nov.. 1890
PROVISIONAL SPECIFICATION.
Improvements in Tools for Forging Elongated Shot and Shell.
We, HENRY HERBERT ANDREW of Toledo Works, Sheffield in the County of York,
Manufacturer, and BENJAMIN BIRKS, of the same address Foreman, do hereby declare
the nature of our invention to be as follows:-
This invention is to improve the tools used in forging elongated projectiles, and
more particularly to enable the parts which are most liable to be damaged by use, to
be renewed and replaced.
The tools alluded to are commonly called top and bottom tools, and are used in
steam hammers or other power hammers.
They are usually made in one solid piece, and have a recess or concavity in the face
of each tool corresponding with the half of an elongated projectile, and a second recoss
at the base of first mentioned recess in which the point of the projectile is formed,
and the ridge of metal between the two recesses forms or constitutes a cutting edge
for cutting off and squaring up the base of the projectile, and it is this part that first
becomes damaged and spoilt.
We propose to remedy this defect by making such parts removable, and we
accomplish this in the following manner; first, by making a section of the face of
each tool removable.
This section will contain the recess in which the point of the projectile is first
forged or shaped, and the ridge of metal constituting the cutting edge as well as
the base of the larger recess, and when this section is removed it will be under-
stood that the end of the large recess is exposed or open, thus enabling the hollow
part to be more readily operated upon by a file or other tool.
The section (which is only a portion of the depth of the tool) is made with a shank
to fit into a corresponding hole in the tool, and may be further secured by screws'or
the like.
The ridge or cutting-edge forming part of the section may be chilled, or may be
hardened, or a separate cutting edge may be made and attached to the section.
Or secondly instead of using a section as above described, we may plane or other-
wise cut out a transverse groove or dovetailed slot in the position of the ridge or
cutter, and drive in a piece of steel of suitable shape, which can be removed and
renewed as often as desired.
Dated the 23rd day of January 1800
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Tools for Forging Elongated Shot and Shell.
We HENRY HERBert Andrew of Toledo Works, Sheffield in the County of York,
Manufacturer, and BENJAMIN BIRKS, of the same address Foreman, do hereby declare
the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
This invention is to improve the forging tools used in the manufacture of elongated
projectiles, and refers more particularly to the parts of such tools as are liable to be
damaged and destroyed by use and to the means for restoring or replacing same.
The forging tools referred to are those known as top and bottom tools, and generally
used in steam hammers or other power hammers, and in order that the invention may
be clearly defined and understood, we have shown in the annexed sheet of drawings
how our invention may be applied to such tools.

page_text: Fig. 1, represents the face of a top or bottom tool, with our invention applied
thereto.
Fig. 2, a vertical section of same.
Fig. 3, a modified arrangement of same.
These tools are usually made in one solid piece of metal, having a recess or con-
cavity A, in the face of each top and bottom tool (or half tool) corresponding in form
with half of the elongated projectile, and also with a second recess B, at the base of
the first named recess A, in which the point of the projectile is first roughly
formed.
These two recesses are divided by a ridge of metal (, which constitutes a cutting
edge, for setting down and partially cutting off the lump of waste material (say steel)
that is formed in front of first made point, and in setting down and squaring the base
of each projectile.
It will therefore be readily understood that in tools for the purpose herein specified,
this ridge, as heretofore constructed out of the solid metal and which is the first part
to give way and be destroyed by wear, would be very difficult to repair, and in
practice such repair is not attempted.
We have therefore constructed such tools on an improved system, having removable
parts or sections, and these parts may be made of a much harder and more durable
material than the body of the tool, and they can be detached and renovated, or entirely
replaced when necessary, instead of having to discard the whole tool, the recessed
parts of which may be in perfect order.
In the tool illustrated in Figs. 1 & 2, and which represents either the top or the
bottom tool, we have shown the ridge C, made of a wedge shaped piece of hard steel,
fitted into a correspondingly shaped dovetailed groove, planed or otherwise formed
transversely in the face of the tool. This ridge piece may he constructed to drive into
the groove tightly and require no other means to secure it in position, or it may be
secured by screws, wedges or the like if preferred.
In Fig. 3. we show a method of carrying out our invention, which has
some advantages over that above described, according to this plan we make the
ridge C, and the recess B. in a separate block of metal D, or the edge of the
ridge may be made of a third piece of steel marked E, and be attached to either
of the two chief parts.
The block D, we prefer to make with a shank F, to be dropped into a corre-
sponding hole in the other part of the tool, and it may be secured by a screw
or equivalent means or it may be secured by rivets. When the block D is removed,
the end of the concave recess A, is left clear, and thus can be readily filled
up, or otherwise surfaced with facility, or by placing the top and bottom tools
together, with the blocks D removed, the recesses A, can be bored out of the
solid to the exact shape required.
Having now particularly described and ascertained the nature of our invention,
and in what manner the same is to be performed, we declare that what we
claim is :-
1-In the construction of top and bottom tools for forging elongated projectiles, a
removable ridge piece C, secured in position by any suitable means, substantially as
herein before described and illustrated in Figs. 1 and 2 of the annexed drawings.
2-In the construction of top and bottom tools for forging elongated projectiles, the
removable block D, with a shank F, or other means of securing same, and having a
detachable ridge-piece E, or a solid ridge as preferred substantially as hereinbefore
described and as shown in Fig. 3.
110To the lot (or at Bat
Патая гваде
ROBT. F. DRURY, Fel. Inst. P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.