IMPROVEMENTS IN EMPLOYED FOR MOULDING PURPOSES
Year: 1885

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I THOMAS WILSON of Pitfield Place, Hunslet in the County of York, Mechanic
do hereby declare the nature of said invention for "IMPROVEMENTS IN
EMPLOYED FOR MOULDING PURPOSES" to be as follows:-
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CHAPLETS
Chaplets" are employed for supporting cores employed for metal castings, and
the object of my invention is so to construct the stem of such "chaplets" that
when cast or embedded within the metal they are perfectly solid with it, and not
liable to get loose as is the case with chaplets of ordinary construction.
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Chaplets constructed in accordance with my invention are particularly
advantageous for steam cylinder castings and other castings for purposes where it
is required for the metal to be steam, water or air-tight. The ends or metal plates
of the chaplets may be of ordinary construction and formed to suit the purposes
for which they are employed.
Hitherto the ends or metal plates have been left with the rough metal scale on,
this separates or rises from the solid metal of the plates when in contact with the
molten metal, causing blown or imperfect "honeycomb" castings. I remove the
scale and polish the plates so that they amalgainate better with the molten metal.
On the stem I provide or cut one or more screw grooves with the edges of the
thread roughed. By this arrangement the molten metal on being let into the
mould runs into the groove and rough part of the screw, whereby the stem is
thoroughly and firmly embedded therein and the danger of it becoming loose or
dropping out is prevented.
J. W. HARDING,
For the Applicant.

page_text: I, THOMAS WILSON of Pitfield Place, Hunslet in the County of York, Mechanic
do hereby declare the nature of said invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:
18
*Chaplets" are employed for supporting cores employed for metal castings, and
the object of my invention is so to construct the stem of such "chaplets" that
when cast or embedded within the mictal they are perfectly solid with it, and not
liable to get loose as is the case with chaplets of ordinary construction.
"
Chaplets constructed in accordance with my invention are particularly
advantageous for steam cylinder castings and other castings for purposes where it 1
is required for the metal to be steam, water or airtight.
And in order that my invention may be completely understood, reference is given
to the accompanying drawing and to the letters and marks thereon.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation and Fig. 2 a sectional plan on A B Fig. 1.
The ends or metal plates a and b of the chaplets may be of ordinary construction
and formed to suit the purposes for which they are employed.
Hitherto the ends or metal plates a and b have been left with the rough metal
scale on, this separates or rises from the solid metal of the plates when in con-
tact with the molten metal, causing blown or imperfect "honeycomb " castings.
I remove the scale and polish the plates so that they amalgamate better with
the molten metal.
On the stem c I provide or cut one or more screw or spiral grooves & with the
edges of the thread roughed as shewn at e.
By this arrangement the molten metal on being let into the mould runs into
the groove and rough part of the screw, whereby the stem is thoroughly and
firmly embedded therein and the danger of it becoming loose or dropping out is
prevented.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
The arrangement and construction of "chaplets" for moulding purposes, formed
of polished plates a and b and the stem c, such stem having one or more screw or
spiral grooves d, with the edges of the thread roughed, substantially as herein set
forth.