IMPROVEMENTS IN DEVICES FOR EXTRACTING CASTINGS FROM MOULDS
Year: 1884

page_text: I, HERBERT JOHN HADDAN, of the firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer, do hereby declare
the nature of said invention for IMPROVEMENTS IN DEVICES FOR EXTRACTING
CASTINGS FROM MOULDS, a communication to me from abroad by Charles Francis
Brush, of Cleveland, United States of America, Electrical Engineer, to be as
follows:-
My invention relates to devices for extracting castings from moulds and is
illustrated in the accompanying drawing, in which Fig. 1 is a perspective view of
my improved casting extractor; Fig. 2 is a side elevation of the casting extractor
resting on a mould, and showing the casting as caught by the extractor and partly
withdrawn from the mould; Fig. 3 is an enlarged sectional view of the extractor
resting on the mould.
In making soft metal castings of comparatively thin web or plate portions on
which are formed, on one or both sides long, thin projection of leaves, it has been
found to be exceedingly difficult to withdraw such castings from the moulds
without distorting or breaking some parts of the casting. To obviate this difficulty
I form on that side of the casting which is most easily exposed or detached from
one part of a jointed or divided mould, a series of transverse ribs, fins or lugs to
which can be attached a device which will evenly draw the casting from the other
half of the mould without danger of bending or breaking any of the parts of the
casting.
The object of my invention is to provide a device whereby these fins may be
firmly grasped and the plates evenly withdrawn from the mould, and my invention
consists, in general terms, of the construction and combination of devices all as
more fully hereinafter described and claimed.
The casting extractor is made with a rectangular frame A, whose width should
be equal, or about equal, to one of the dimensions of the frame of the mould in
which the casting is formed. In the present case, the width of the frame is nearly
equal to the width of the mould frame, as the ribs or fins are formed transversely
across the casting. Within this frame I arrange a series of transverse angle bars a¹,
...מ

page_text: at proper distance apart, and on the under side of each of these transverse angle
bars a¹, I form or secure a flange a', which is bevelled or inclined outward on its
upper edge as clearly shown in Fig. 3. In the middle of these bars are formed lugs
or ears a³, to which are pivoted angle bars a by similar ears as formed thereon.
On the working edge or face of these bars a is formed a rectangular recess a, into
which, when the bars a are turned down, the flange a projects. To the top of
each of the pivoted bars a are secured two crank arms a³, between which is secured
the handle a', by which the bars a are operated. On the side bars of the frame A
and near the ends of the same are pivoted the dogs or levers b, and the levers b are
held normally parallel with the side bars of the frame by a spring 63. Just above
the outer ends of the levers b are pivoted the handles B, by which the extractor
can be lifted. The ends of the handles B, outside their pivoting points are curved
to an eccentric shape as at 8, so that when the handles are in a horizontal position
they will bear on but will not depress the ends 6 of the levers b, but when the
handles are turned up the eccentrics will gradually push the ends b² of the levers
below the level of the frame A.
The operation of my device is as follows:- The part of the mould in which the
ribs, fins, or lugs are formed is removed.
An operator then to prepare the extractor for use seizes the handles a7 of the
crank arms a², and moves it up into the position shown at the left hand of
Figs. 1 and 3, thereby turning the pivoted bar a, so as to separate the gripping face
of the bar a from the gripping face of the angle bar al, and at the same time he
turns down the handles B to the horizontal position, thereby allowing the lever b
to assume a position parallel to the sides of the frame A, as shown. When the
devices of the extractor are in the positions above described, it is so placed on the
half D of the mould containing the casting, that the ribs or fins d will project up
between the transverse bars a¹, and the ends 6 of the lever b will rest on the sides
of the mould. The frame A is then slid along until the gripping edges of the
bars a¹ will bear against the ribs d, if not already in that position, as shown at the
left hand of Fig. 3. The pivoted bars a are then turned down by the handles a?,
beginning at the first bar at the right hand. On the turning down this bar a, its
gripping face strikes the top of one of the ribs d, and bends it down upon the
flanges a, and as the flanges at are bevelled off, as clearly shown in Fig. 3; these
ribs will be tightly wedged in between the flanges a' and the side of the recess a".
The crank arms a³ of the pivoted bars a are so constructed that as each succeeding
bar going to the left is turned down it locks the preceding bar in place by coming
against the heel end of the same as it is clearly shown in all the figures. The
operator now turns up the handle B, thereby depresses the levers b, and as they
bear against the mould, the extractor is caused to gradually rise, pulling with it the
casting as shown in Fig. 2. The ends of the handles B are so shaped that the
upward movement of the extractor is very gradual at first, as the greatest strain is
required in starting the casting from the mould. After the casting has been started
as above described, it can be entirely removed from the mould by the operator
lifting the extractor by the handles B, which have been turned up to a vertical
position, and placed on some convenient table. The pivoted bars a are then turned
back by their handles a' and the extractor slid along until the gripping faces of the
bars a¹ are disengaged from the ribs d, when the extractor can be lifted from
the casting.
While I have described the mechanisms employed in detail, it is still true that
considerable variation may be made in the construction of such devices, without
departing from the scope of the present invention.
The operation of the gripping mechanism may be varied at pleasure according to
the size and weight of the casting, but one pair of grippers should be provided for
each rib or lug or projection on the casting.
The essential characteristic features of the present invention consist in the
presence: first, of a series of grippers suitably arranged for engagement with the
corresponding series of ribs, lugs or projections on the casting; and second a lifting

page_text: mechanism which being secured to and connected with the gripping mechanism
may be caused to act against the mould from which the casting is to be lifted, so
as thereby to separate the grippers from the mould, and raise the casting bodily
therefrom, and for this latter purpose, any mechanism known in the arts and
adapted for such purpose may be substituted for the levers B.
Nor will it be a material departure from my invention that the mechanism for
raising the grippers be connected with the mould, so as to operate on the grippers
in the manner set forth, for the purpose of raising the casting clear of the mould,
and while I believe these to be the essential characteristic features of my
improvement, the other features accordingly add materially to its utility and
convenience and use.

page_text: I, HERBERT JOHN HADDAN, of the firm of Herbert and Company, Patent Agents,
of 67, Strand, in the City of Westminster, Civil Engineer, do hereby declare the
nature of my invention for IMPROVEMENTS IN DEVICES FOR EXTRACTING CASTINGS
FROM MOULDS, a communication to me from abroad by Charles Francis Brush, of
Cleveland, United States of America, Electrical Engineer, 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 devices for extracting castings from moulds and is
illustrated in the accompanying drawing, in which Fig. 1 is a perspective view of
my improved casting extractor; Fig. 2 is a side clevation of the casting extractor
resting on a mould, and showing the casting as caught by the extractor and partly
withdrawn from the mould; Fig. 3 is an enlarged sectional view of the extractor
resting on the mould.
In making soft metal castings of comparatively thin web or plate portions on
which are formed, on one or both sides long, thin projection of leaves, it has been
found to be exceedingly difficult to withdraw such castings from the moulds without
distorting or breaking some parts of the casting. To obviate this difficulty I form
on that side of the casting which is most easily exposed or detached from one part
of a jointed or divided mould, a series of transverse ribs, fins or lugs to which can be
attached a device which will evenly draw the casting from the other half of the
mould without danger of bending or breaking any of the parts of the casting.
The object of my invention is to provide a device whereby these fins may be
firmly grasped and the plates evenly withdrawn from the mould, and my invention
consists, in general terms, of the construction and combination of devices all as more
fully hereinafter described and claimed.
The casting extractor is made with a rectangular frame A, whose width should
be equal, or about equal, to one of the dimensions of the frame of the mould in
which the casting is formed. In the present case, the width of the frame is nearly
equal to the width of the mould frame, as the ribs or fins are formed transversely
across the casting. Within this frame I arrange a series of transverse angle bars a³,
at proper distance apart, and on the underside of each of these transverse angle
bars a¹, I form or secure a flange a, which is bevelled or inclined outward on its
upper edge as clearly shown in Fig. 3. In the middle of these bars are formed lugs
or ears a³, to which are pivoted angle bars a by similar ears as formed thereon. On
the working edge or face of these bars a is formed a rectangular recess a6, into which, a
when the bars a are turned down, the flange a projects. To the top of each of the
pivoted bars a are secured two crank arms a², between which is secured the handle a',
by which the bars a are operated. On the side bars of the frame A and near the
ends of the same are pivoted the dogs or levers b, and the levers bare held normally
parallel with the side bars of the frame by a spring 63. Just above the outer ends 4
of the levers bare pivoted the handles B, by which the extractor can be lifted. The
ends of the handles B, outside their pivoting points are curved to an eccentric shape
as at 8, so that when the handles are in a horizontal position they will bear on but
will not depress the ends 62 of the levers b, but when the handles are turned up the
eccentrics will gradually push the ends 62 of the levers below the level of the 4
frame A.
.
The operation of my device is as follows:-The part of the mould in which the
ribs, fins, or lugs are formed is removed.

page_text: An operator then to prepare the extractor for use seizes the handles a² of the
crank arms a², and moves it up into the position shown at the left hand of Figs. 1
and 3, thereby turning the pivoted bar a, so as to separate the gripping face of the
bara from the gripping face of the angle bar a¹, and at the same time he turns down
the handles B to the horizontal position, thereby allowing the lever b to assume a
position parallel to the sides of the frame A, as shown. When the devices of the
extractor are in the positions above described, it is so placed on the half D of the
mould containing the casting, that the ribs or fins d will project up between the
transverse bars a₁, and the ends be of the lever b will rest on the sides of the mould.
The frame A is then slid along until the gripping edges of the bars a' will bear
against the ribs d, if not already in that position, as shown at the left hand of
Fig. 3. The pivoted burs a are then turned down by the handles a', beginning at
the first bar at the right hand. On the turning down this bar a, its gripping face
strikes the top of one of the ribs d, and bends it down upon the flanges a³, and as
the flanges a are bevelled off, as clearly shown in Fig. 3, these ribs will be tightly
wedged in between the flanges a' and the side of the recess aº. The crank arins a³
of the pivoted bars a are so constructed that as each succeeding bar going to the left
is turned down it locks the preceding bar in place by coming against the heel end of
the same as it is clearly shown in all the figures. The operator now turns up the
handle B, thereby depresses the levers b, and as they bear against the mould, the
extractor is caused to gradually rise, pulling with it the casting as shown in Fig. 2.
The ends of the handles Bare so shaped that the upward movement of the extractor
is very gradual at first, as the greatest strain is required in starting the casting from
the mould. After the casting has been started as above described, it can be entirely
removed from the mould by the operator lifting the extractor by the handles B,
which have been turned up to a vertical position, and placed on some convenient
table. The pivoted bars a are then turned back by their handles a and the
extractor slid along until the gripping faces of the bars a¹ are disengaged from the
ribs d, when the extractor can be lifted from the casting.
While I have described the mechanisms employed in detail, it is still true that
considerable variation may be made in the construction of such devices, without
departing from the scope of the present invention.
The operation of the gripping mechanism may be varied at pleasure according to
the size and weight of the casting, but one pair of grippers should be provided for
each rib or lug or projection on the casting.
The essential characteristic features of the present invention consist in the
presence: first, of a series of grippers suitably arranged for engagement with the
corresponding series of ribs, lugs or projections on the casting; and second a lifting
mechanism which being secured to and connected with the gripping mechanism may
be caused to act against the mould from which the casting is to be lifted, so as
thereby to separate the grippers from the mould, and raise the casting bodily
therefrom, and for this latter purpose, any mechanism known in the arts and
adapted for such purpose may be substituted for the levers B.
Nor will it be a material departure from my invention that the mechanism for
raising the grippers be connected with the mould, so as to operate on the grippers
in the manner set forth, for the purpose of raising the casting clear of the mould,
and while I believe these to be the essential characteristic features of my
improvement, the other features accordingly add materially to its utility and
convenience and use.
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
1. In an apparatus for extracting castings from the mould, the combination of a
gripping mechanism for taking a firm hold on the casting and a mechanism suitably
arranged for forcing asunder the grippers and the mould in which the casting is
made, while the grippers retain their hold on the casting, substantially as set forth.

page_text: 2. In an apparatus for extracting castings from moulds, the combination of the
frame A transverse bars a³, pivoted bars a, and mechanisin for causing said gripping
mechanism to take a firm hold on the casting, substantially as set forth.
3. In an apparatus for extracting castings from moulds, the combination of the
frame A, transverse bars a³, provided with flanges a', pivoted bars a, provided with
recess α, and mechanism for lifting the frame from the mould, substantially as
set forth.
4. In an apparatus for extracting castings from moulds, the combination of a frame
provided with mechanism for grasping and holding the casting, the levers b, and the
handles B, substantially as set forth.
5. In an apparatus for extracting castings from moulds, the combination of the
frame A, transverse bars a¹, pivoted bars a, the levers b, and the handles B,
substantially as set forth.