Improvements in Casting Mould Attachments.
Year: 1892

page_text: Date of Application, 25th Aug.; 1892
Complete Specification Left, 25th May, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Casting Mould Attachments.
We HENRY HILL Senr. and HENRY HILL Junr. of Russell Street Foundry
Willenhall in the County of Stafford Ironfounders, and CHARLES HILL and
LEMUEL HILL of Spring Bank Foundry, in the Town and County aforesaid,
Brass and Ironfounders, do hereby declare the nature of this invention to be as
follows:-
Hitherto it has been customary to use boards and wooden clips or clamps and
wooden adjusting screws in connection with the moulds for casting purposes.
These have been found inconvenient and objectionable in many ways, inasmuch as
they are very liable to char and burn when the moulten metal is poured into the
mould.
Our improvements relate to a method whereby we dispense with the wooden
boards clips and adjusting screws and substitute therefore cast iron plates also the
clips or clamps together with the adjusting screws for retaining the plates in
position are made of cast iron.
These clips or clamps are cast with the adjusting hand screws on each side of
same for the purpose of screwing up the parts of the clip to rigidly hold the plates
upon the mould.
The above named cast iron plates are perforated on the surface with holes the
object of this being to allow the superfluous confined gasses to escape more easily
when the moulten metal is poured into the mould.
By our improvements far better and cleaner castings can be produced moreover
the plates, clips, screws etc. are practically indistructable from the effects of fire
and heat also the clips and screws compared with the wooden ones obviously occupy
far less room than by the existing method.
Dated this 23rd day of August A.D. 1892.
EDWARD J. PAYNE & SON,
104, Colmore Row, Birmingham, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Casting Mould Attachments.
".
We HENRY HILL, Senior and HENRY HILL Junior trading as Henry Hill
& Sons of Russell Street Foundry Willenhall in the County of Stafford Iron-
founders and CHARLES HILL and LEMUEL HILL both of Spring Bank Foundry
in the aforesaid Town and County, Brass and Ironfounders, 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,
reference being had to the drawings hereunto annexed and to the figures and
letters shewn thereon :-

page_text: Figure 7. enlarged section of plate shewing holes.
Similar letters of reference relate to similar parts on all the figures.
Hitherto it has been the general practice to use wooden boards, wooden clips or
clamps, and wooden adjusting screws, in connection with the particular kind of
casting moulds to which our improvements relate.
Numerous disadvantages exist in the wooden construction, especially that they
are very liable to char, burn, and in a comparatively short space of time become
absolutely worthless.
Our improvements relate to a method whereby we dispense with the wooden
boards, screws, and clips, used in iron and brass castings and substute therefor
metal plates A, at front and back of the mould G, these plates are composed of
cast iron though if desired other suitable metal may be used. It is important that
the plates A, clips D, and hand screws E, be made as light as possible consistent
with strength in order that they may be as nearly as possible, the same weight as
the wooden ones, we therefore use a special mixture of iron, which while it is light,
is of a very tough, nature and which enables the plates, clips, and screws, to be
made light, and yet strong. These cast iron (or other metal) front, and back
plates, are perforated on the surface thereof with holes B to allow the superfluous
confined gases, and steam to escape more freely (thus preventing "blown
castings) when the molten metal is poured into the mould G through the gates or
inlets C.
"
It should be stated that the edges of the holes B are tapered or bevilled back
and front (see section) to allow of the plate being reversed when desired, and
so used either side, thereby preventing any possibility of uneven contraction or
warping of the plates.
The clips or clamps D, in connection with.these plates A have projecting pieces
or flanges D', cast therewith which give an extra bearing upon the plates A.
These together with their adjusting hand screws E, are as stated also made of cast
iron or other suitable metal, the screws being detachable from the clips or clamps.
A feature of this part of our improvements exists in the method of casting the
screws E, with the bosses F, and afterwards liberating the same. The screws' E
are first cast ready wormed in malleable iron after which the worm is made true by
being run through a pair of dies. The one part of the clip upon which are the
bosses is then moulded, in sand & the wormed ends of the screws E are then laid
in the mould in the manner of a core after which the molten iron is poured into
the mould & obviously runs round the wormed ends of the screws E, thus forming
in the bosses F (when the screws are withdrawn) a wormed hole in which the
screws E work.
Unless this was done the worm on the screws E and in the bosses F
would have to be formed in a lathe.. It will thus be seen that a great saving of
labour is effected as when the casting leaves the mould it is ready "fitted."
Wherefore by our improvements a simple and effective method for the making of
these parts is obtained.
These hand screws E when screwed into the bosses F of the clip, rigidly
compress and retain the plates A with the sides of the casting mould G and the
plates are more easily bedded on to the mould, as they do not need raising again
after being once set down, the surplus sand underneath rising through the holes B
when the plates A are bedded and fitted "dead" onto the sides of the mould' G
prevent over screwing and thus produce castings of even thickness-free from
flash," and needing little or no dressing which is an important point.
Amongst other advantages these improved plates, screws; and clips, are
practicably indestructable from the effects of fire; and heat, occasioned by the
constant pouring in of the molten metal etc. which obviously in time chars and
perishes the wooden combination..
A further advantage exists in the fact that our improved plates and attachments
when put together, with the mould; and,ranged (say) side by side, charged with the
sand, and moulten metal will occupy much less space in the factory, or, casting shed,
which is a consideration in small works where space is an object.

page_text: Furthermore as compared with previous methods, our arrangement is much easier
to work and better and cleaner casting are turned out, a great percentage of waste
is also saved.
We may say finally, that we do not propose to confine ourselves to the precise
details of construction, as above set forth as we may deem it expedient to vary the
arrangements to suit individual cases always providing that the essential features of
our invention be retained.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
Firstly. The improvements in the manufacture of casting mould attachments,
consisting of perforated back, and front plates, the clips, or clamps, and the
adjusting hand screws, all of which parts are made of cast iron preferably, or other
suitable metal, for the purposes specified herein and iu manner substantially as set
forth and illustrated.
Secondly. We claim the special method of casting the adjusting handscrews,
with the bosses, and clamps, and afterwards liberating the screws, substantially in
manner as herein set forth.
Thirdly. In attachments for casting moulds the method of bevelling off at
suitable angle the edges of the apertures, in metallic plates, both at the front and
back, substantially as herein set forth.
Dated this 25th day of May A.D. 1893.
EDWARD J. PAYNE & SON,
104, Colmore Row, Birmingham, Agents for the Applicants.