Improvements in or relating to Moulding Boxes.
Year: 1898

page_text: Improvements in or relating to Moulding Boxes.
We, PLANET FOUNDRY COMPANY, LIMITED, JAMES LEARMONTH, and GEORGE FOX
CALDERWOOD, all of Planet Foundry, Guide Bridge, near Manchester, Iron-
Founders, do hereby declare the nature of our said invention to be as follows:
:-
Our said invention relates to moulding boxes for use principally in the mould-
ing of large light castings from "patterns on the plate" such as register grates,
mantlepieces and the like, with which it has heretofore been difficult after
removing the pattern plate to maintain the proper level or juxtaposition between
the moulding boxes, and our said invention is intended to overcome such diffi-
culty in the following simple and effective manner.
Upon one side or end of the lower moulding box we apply a set of brackets
or extensions having a pair of trunnion recesses or grooves, and upon the cor-
responding side or end of the upper moulding box we apply another set of
brackets or extensions having each a pair of trunnions. The trunnions of one
bracket are on the right hand, and the trunnions of the other bracket on the left
hand. They also lie directly above the recesses in the brackets on the lower
box, and with nothing between the boxes one of the trunnions on each bracket
rests in the recess furthermost from the moulding box, and for the time being
such trunnions form the pivots of the upper box.
In using the boxes the upper moulding box is placed upside-down on the floor,
or other support. Over it is then placed the pattern plate, and over such plate
the lower moulding box in the usual manner, but owing to a set of projections
or extensions on the pattern plate which are adapted to fit and fill the recesses
nearest the moulding box the trunnions over such recesses are caused to lie upon
the extensions, and for the time being form the pivots of the boxes, instead of
the trunnions which lie furthermost from the boxes which lie in their recesses,
but do not rest therein, and are each the thickness of the plate away from the
bottom of their recess.
Sand being placed and rammed into the moulding box forming the upper box
for the time being the whole apparatus is then inverted, and the moulding box
previously on the floor brought uppermost. Sand is then placed and rammed
into such box in the ordinary manner until the pattern is fully taken. The
upper box is then raised, partly upon the aforesaid trunnions resting on the
plate extensions, and partly upon the trunnions in the recesses.
The upper
box being then retained in its raised position by any suitable means, the pattern
plate is raised and removed bodily away from the boxes. The upper box is
then lowered again, this time wholly upon the trunnions furthermost from the
moulding boxes, due to the removal of the plate extensions from beneath the
other trunnions, and when fully lowered the edges of the boxes come against
each other in perfect abutment, due to the change of hinge centre, or trunnions.
To keep the pattern plate in proper relation to the boxes we provide the

page_text: extensions with snugs or ears which lie between the two opposite brackets on
the lower box.
Dated this 16th day of September 1898.
PLANET FOUNDRY CO., LTD.,
JAMES LEARMONTH.
GEORGE FOX CALDERWOOD.
By John G. Wilson & Co.,
Agents.
improvements in or relating to moulding Boxes.
We, PLANET FOUNDRY COMPANY, LIMITED, JAMES LEARMONTII, and GEORGE Fox
CALDERWOOD, all of Planet Foundry, Guide Bridge, near Manchester, Iron
Founders, 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:-
Our said invention relates to moulding boxes for use principally in the mould-
ing of large light castings from " patterns on the plate such as register grates,
mantlepieces and the like with which it has heretofore been difficult after
removing the pattern plate to maintain the proper level or juxtaposition between
the moulding boxes, and our said invention is intended to overcome such diffi-
culty, which we do in the manner set forth on the accompanying drawings and
which we will now proceed to describe by the aid of the figures and letters of
reference marked on the several views.
On Sheet One, Figs. 1, 2 and 3 are perspective views respectively of the upper
and lower moulding boxes and the intermediate pattern plate, shewn reversed
and in the order in which they are placed one upon another.
On Sheet 2, Figs. 4, 5 and 6 shew the details of our invention in elevation
right way up and Figs. 7, 8 and 9 shew plans of such details. Figs. 10 to 16
illustrate the several stages in the manipulation of the boxes and pattern plate.
In accordance with our invention and referring to Figs. 4 to 9 we apply upon
one end a side of the lower moulding box a set of brackets (A), having a pair
of trunnion recesses (B) (B), and upon the corresponding side or end of the
upper moulding box (C) we apply another set of brackets (1) having each a pair
of trunnions (E), (E). The trunnions of one bracket are on the light hand,
and the trunnions of the other bracket on the left hand. They also lie directly
opposite the recesses (B), (B*) in the brackets on the lower box, and with nothing
between the boxes the trunnion (E) on each bracket (1) rests in the recesses (B*)
and for the time being, such trunnions (E) form the pivots of the upper box.
Upon the corresponding end or side of the moulding plate (F) we also apply
extensions (G), which are of such a character that when the plate is lowered on
to the box (A) they occupy and fill the recesses (B), therefore with the box (C)
lowered upon such plate the said box instead of having its fulcrum upon trun-
nions (E), has its fulcrum on trunnions (E*).
In using the boxes the upper moulding box (C) is placed upside down on the
floor, or other support, as shewn in Figs 1 and 10. Over it is then placed the
pattern plate (F), see Fig. 11, and over such plate the moulding box (A), see
Fig. 12.
Sand being placed and rammed into the moulding box (A) the whole apparatus
is then inverted, and the moulding box (C) brought uppermost see Fig. 13.

page_text: Sand is then placed and rammed into box (C), in the ordinary manner, until the
pattern is fully taken. The box (C) is then carefully raised, partly upon the
aforesaid trunnions (E) resting on the plate extensions (G) and partly upon
the trunnions (E*) in the recesses (B), see Fig. 14. The box (C) being then
retained in its raised position by any suitable means, the pattern plate (I) is
raised and removed bodily away from the boxes.
The box (C) is then lowered again, this time wholly upon the trunnions (E³)
due to the removal of the plate extensions (G) from beneath the trunnions (E),
and thus when fully lowered the edges of the boxes come against each other in
perfect abutment due to the change of hinge centre, or trunnions.
To keep the pattern plate in proper relation to the boxes we provide the
extensions (G) with snugs, ears or flanges (G) which lie between the two oppo-
site brackets (A) on the lower box.
For convenience in fixing we mould or form the brackets (D) with trunnions
on both sides so as to be interchangeable, or capable of being fixed at either
end of the box,
For strengthening the trunnions we may form them between a forked bracket
as shewn by dotted lines in Fig. 7, and for preventing the recesses (B), (B³)
getting choked with sand, we may form them with a rounded, or knife edge,
as roughly shewn by dotted lines in Fig. 9. We may also form the trunnions
with corresponding grooves, as also shewn in dotted lines in Fig. 7.
Having thus particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what
we claim is:-
1: Moulding boxes, provided with duplex trunnion bearings, and adapted to
change from one bearing to the other by the removal of the moulding plate,
substantially as set forth.
2: A moulding box with brackets (D) and trunnions (E), (E) as and for
the purposes set forth.
3: A moulding box with brackets (A) and recesses (B), (B*), as and for the
purposes set forth.
4: A moulding plate with projections or preparations (G), as and for the
purposes set forth.
Dated this 17th day of June 1899.
PLANET FOUNDRY COMPANY, LD.
JAMES LEARMONTH.
GEORGE FOX CALDERWOOD.
By John G. Wilson & Co.,
55, Market Street, Manchester.