Improvements in Mould Apparatus for Casting.
Year: 1892

page_text: Date of Application, 5th Oct., 1892
Complete Specification Left, 29th June, 1893-Accepted, 29th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Mould Apparatus for Casting.
We, STEPHEN ALLEY and JOHN ALEXANDER MACLELLAN, of Sentinel
Works, Polmadie, in the County of Renfrew, North Britain, Engineers, do hereby
declare the nature of this invention to be as follows, that is to say :---
Our said invention is principally of advantage for moulds for casting large
articles, but is applicable to any moulds in which the sand or mould material is
partly supported by transverse or other bars. Such bars are ordinarily cast in the
same piece with, or are otherwise rigidly fixed to, the sides or ends of the mould
box or flask. With such bars, and especially when the sand or mould material is
compressed by means of hydraulic cylinders or other mechanical appliances, there
is apt to be insufficient density between the inner edges of the bars and the pattern
which causes defects in the casting.
The object of our invention is to avoid such defects and for that purpose we have
the bars inade separate from the mould box or flask, and guided in any convenient
manner as for example by slots or ribs in or on the sides or ends or both. When
making a mould the bars are held by clamping screws or other convenient devices,
at a small distance above their proper final positions. After the sand or mould
material has been filled in the bars are unfastened, and the apparatus which forces
down and compreses the sand or mould material also presses down the bars and
thereby insures sufficient density under their edges. The bars may be of various
shapes to suit different patterns; and in some cases their inner edges may have
points which in their final positions touch or almost touch the pattern.
Dated this Fourth day of October 1892.
EDMUND HUNT,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in Mould Apparatus for Casting.
We, STEPHEN ALLEY, and JOHN ALEXANDER MACLELLAN, of Sentinel
Works, Polmadie, in the County of Renfrew, North Britain, Engineers, 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, that is to say :-
Our said invention is principally of advantage for moulds for casting large
articles, but is applicable to any moulds in which the sand or mould material is
partly supported by transverse or other bars. Such bars are ordinarily cast in the
same piece with or are otherwise rigidly fixed to the sides or ends of the mould box
or flask.
With such bars, and especially when the sand or mould material is
compressed by means of hydraulic cylinders or other mechanical appliances, there
is apt to be insufficient density between the inner edges of the bars and the pattern,
which causes defects in the casting.
The object of our invention is to avoid such defects, and for that purpose we
have the bars made separate from the mould box or flask, and guided in any
convenient manner, as for example by slots or ribs in or on the sides or ends or
both of the mould box. The bars are fitted with clamping screws or other
convenient devices to fix them to the mould box or flask when desired.
And in order that our said invention and the manner of performing the same
may be properly understood, we hereunto append a sheet of explanatory drawings,
(PQ77

page_text: to be hereinafter referred to, and showing a mould box or flask, as made with our
improvements.
Figure, 1, of the drawings is a plan. Figure, 2, is a longitudinal vertical
section, and Figure, 3, a sectional end elevation.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
The bars, A, are made separate from the flask, B, and are guided by slots, C, in
the ends and by ribs, D, on the sides of the flask. When about to make a mould
the bars, A, are held at a small distance above their final positions by means
of screw studs, E, formed on or fixed in them and extending through the slots, C,
in the ends of the flask, B, the said studs being fitted with hand clamping
nuts, F.
After the sand or mould material has been filled in the bars, A, are unfastened,
and the apparatus which forces down and compresses the sand or mould material
also presses down the bars, and thereby insures sufficient density under their
edges, G. The bars, A, may be of various shapes to suit different patterns; and
their inner edges, G, are preferably formed with points, H, which in their final
positions touch or almost touch the pattern.
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 :-
In mould apparatus for casting, the employment of bars which are made separate
from the mould box or flask, and are guided by slots or ribs or by both slots and
ribs in or on the sides and ends of the mould box or flask, the parts being con-
structed, combined, and arranged substantially as and for the purposes bereinbefore
described.
Dated this Twenty-eighth day of June 1893.
EDMUND HUNT,
Applicants' Agent.