Improvements in and relating to the Production or Formation of Hollow Metal Castings.
Year: 1897

page_text: Date of Application, 14th Dec., 1897
Complete Specification Left, 6th Apr., 1898-Accepted, 7th May, 1898
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Production or Formation of
Hollow Metal Castings.
I, WALTER WOOD, of 400, Chestnut Street, Philadelphia, U.S.A., at present stay-
ing at 49, Cannon Street, London, Merchant, do hereby declare the nature of this
invention to be as follows:-
My invention relates to a new and improved method of producing hollow castings
such as pipes, whereby I am enabled in all cases to obtain the interior surface of
the pipe free from any projections, irregularities or the like, due to the use of
anchors, core-irons or chaplets, and the invention is especially applicable to the
manufacture of pipes for telephone or electrical cables, which result to the best of
my knowledge has not hitherto been attained.
In carrying out my invention I so arrange the chaplets supporting the core that
the resulting casting thereon is free from the above-mentioned defects and is of a
smooth bore absolutely free from projections.
As a means of attaining this result I at present propose to form one or more
recesses or grooves around the inner circumference of the pipe and to arrange the
heads of the anchors or core-irons, which support the core within the same so that
when the casting is completed, the anchors or chaplets will not project beyond the
inner surface or bore of the pipe; and around the core at suitable intervals I may
provide a band having a width and depth sufficient to permit of its resting or
bearing upon the sunk heads of the anchors or core-irons. may form these bands
in one with the cores or I may form them wholly or in part of asbestos or of other
suitable material.
improvements in a
Hollow Metal Castings.
you o
I, WALTER WOOD, of 400, Chestnut Street, Philadelphia, U.S.A., at present stay-
ing at 49, Cannon Street, London, England, Merchant, do hereby declare the nature
[Price Sd1

page_text: 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 a new and improved method of producing hollow castings
such as pipes, whereby I am enabled in all cases to obtain the interior surface of
the pipe free from any projections, irregularities or the like, due to the use of
anchors, core-irons or chaplets and the invention is especially applicable to the
manufacture of pipes for telephone or electrical cables, which result, viz. freedom
from all serious projections, to the best of my knowledge has not hitherto been
attained where anchors have been used. Usually the head of the anchor employed
during the casting to steady the core, causes projections within the pipe which
projections are liable to injure or abrase, even if not to scrape off, the insulating
material or wrappings from these cables when the latter are being subsequently
drawn through the pipe.
In carrying out my invention I so arrange the chaplets supporting the core that
the resulting casting thereon is free from the above-mentioned defects and is of a
practically smooth bore absolutely free from projections.
Upon the accompanying sheet of drawings,
Figure 1 represents a longitudinal section through a portion of the pipe mould
shewing position of anchors or chaplets.
Figure 2 is an elevation of a corresponding portion of the core.
Figure 3 illustrates a modification of the above, the core having a uniform
diameter and being provided with a band either continuous or in sections, of asbestos
or other suitable material which bears upon the anchors or chaplets.
As a means of attaining this result I at present propose to form one or more
recesses or grooves A around the inner circumference of the pipe B and to arrange
the heads of the anchors or core-irons C, which support the core D within the same
so that when the casting is completed, the anchors or chaplets C will not project
beyond the inner surface or bore of the pipe; and around the core D at suitable
intervals I may provide a band E having a width and depth. sufficient to permit of
its resting or bearing upon the sunk heads of the anchors or core-irons.
I may
form these bands in one with the cores.or I may form them wholly or in part of
asbestos or of other suitable material and as shewn in Figure 3.
Any desired number of these asbestos or similar bands or sections of bands may
be used, bearing upon the anchors or chaplets.
The band or bands E may be continuous or not or, in lieu of being made separate,
may be formed upon the outer surface of the core and of the same material, if desired,
as this latter.
I have described my invention in relation to the formation of a metal pipe, this
being the principal purpose or use of the invention. It may however, be applied
to all hollow castings, there being no practical difference in carrying it out in the
case of other hollow castings. The mould is shewn recessed on the drawing this
being advantageous in the case of thin pipes or other thin castings, but is not
essential.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
-
1. In the formation of hollow metal castings, the use of anchors recessed within
the mould so as to steady the core, the said anchors not projecting beyond the inner
surface or bore of the hollow casting, with or without the use of one or more suitable
bands or segments arranged to fit around the core and bearing upon the heads of
the anchors, substantially as described.
2. In the formation of hollow metal castings, the combination of recesses or a
groove or grooves A around the inner circumference of the hollow casting B, and
of anchors or core-irons C supporting the core D of the casting, substantially as
described.

page_text: 3. In the formation of hollow metal castings, the combination of recesses, groove
or grooves A around the inner circumference of the casting, of an inner core D, of
anchors or core-irons C, and of one or more bands or segments E of asbestos or other
suitable material formed upon the said core or bearing against the anchors and the
core D, substantially as described.
4. Hollow metal castings formed with practically smooth bores free from internal
projections due to the use of ordinary chaplets or core-irons, for the purposes and as
described.
Dated this 6th day of April 1898.
For the Applicant,
GEDGE & FEENY,
Chartered Patent Agents, 60, Queen Victoria Street, London, E.C.