Improvements in the Manufacture of Cores for Use in the Casting of Metals.
Year: 1886

page_text: Date of Application, 6th Apr., 1886.
Complete Left, 6th Jan., 1887.
Complete Accepted, 5th Apr., 1887.
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Cores for Use in the Casting
of Metals.
I ROBERT APPLEGARTH of Atlas Works Ewer Street Southwark Street London in
the County of Surrey Engineer do hereby declare the nature of this invention to be
as follows:-
This invention having for its objects the production and application of improved
cores for forming hollows or spaces in metal castings is carried into effect by mixing
powdered carbon with sand, loam, ashes and asbestos or other suitable fibrous materials
and making them into a paste of the required consistency with tar, oils or aqueous
solutions. The paste so formed is pressed into or passed through dies having the
required form or section and the cores thus formed are then subjected to elevated
temperatures in closed vessels and ovens, thereby rendering them sufficiently hard to
withstand rough usage. Cores produced as described are perfectly homogeneous and
have such clean surfaces that the holes or spaces formed by them in the castings are
so true as in many cases to obviate the necessity of drilling or using other means for
preparing the castings for the various mechanical purposes to which they are to be
applied.
Dated this 4th day of Annil 1002

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Cores for Use in the Casting
of Metals.
1, ROBERT APPLEGARTH, of Atlas Works, Ewer Street, Southwark Street, London,
in the County of Surrey Engineer, 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 having for its objects the production and application of improved
cores for forming hollows or spaces in metal castings, is carried into effect by mixing
powdered carbon, with either sand, loam, ashes, or asbestos or other suitable fibrous
material, and making them into a paste of the required consistency with tar, oils or
water, or a solution consisting of sugar or other saccharine matter and water. The
paste so formed is pressed into or passed through dies having the required form or
section and the cores thus formed are then subjected to elevated temperatures in
closed vessels and ovens thereby rendering them sufficiently hard to withstand rough
usage. Cores produced as described are perfectly homogeneous and have such clean
surfaces that the holes or spaces formed by them in the castings are so true as in
many cases to obviate the necessity of drilling or using other means for preparing the
castings for the various mechanical purposes to which they are to be applied. I have
found the following proportions to yield good results-sand 9 lbs, Carbon 6 lbs,
liquor 2 to 10 ozs.
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 manufacture of cores for use in the casting of metals by mixing powdered
carbon with either sand, loam, ashes, or asbestos or other suitable fibrous material,
making the mixture into a paste with tar, oil, or water, or a solution consisting of
sugar or other saccharine matter and water; pressing the said paste into, or passing
it through dies, and heating the pressed material in closed vessels and ovens
substantially as hereinbefore described.
Dated this 6th day of January 1887