Improved Device for Forming Green Sand-Cores. for Railroad Journal Boxes.
Year: 1890

page_text: Date of Application, 23rd Apr., 1890
Complete Specification Left, .22nd Jan., 1891-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improved Device for Forming Green Sand-Cores. for Railroad
Journal Boxes.
I, DONALD CAMERON, of Victoria Chambers, 55 and 56, Chancery Lane, in the
County of London, Manager, (a communication to me from abroad by William
Sterrit, of Pittsburg, Pennsylvania, U.S.A., Inventor,) do hereby declare the nature
of this invention to be as follows:-
This invention has relation to the method and means of making green-sand cores
for railroad journal boxes, and has for its object the provision of novel expedients
to be used in forming the green sand core whereby a great, saving in labour, and
material is effected and the usual drying, blackening, handling, and pasting incident
to the use of dry sand are obviated.
:
"This invention consists in the novel construction of an arbour or stem adapted to
be inserted in the core-box for the purpose of forming a base, body, or support for
the reception of the green sand constituting the core of a journal-box, the said
arbour or stem being provided with end pieces having strips for lifting the core out
of the box and setting it in the mould, and being also provided with detachable ribs
or bars to retain the sand in proper position upon the arbour or stem.
By this invention a core-box is provided in which the, green sand core for a
railroad journal box is formed. The said core-box is constructed of the usual or any
suitable pattern.
+
A core.arbour is provided and to which the invention particularly relates, and
which consists of a long bar or beam made of iron or other suitable, material and
having tapering sides and one or both of its edges inclined, so as to give the arbour
a characteristic wedge shape, which will facilitate its removal from the core, when
the casting is finished.
1 2
Upon each end of the bar or arbour is formed a flat tongue, to receive a plate
mortised for the passage of said tongue and formed with a flange by, which the bar
and the core are lifted from the core-box and placed in the mould. These plates
are secured in position upon the bar by means of wedge-shaped keys or other
suitable fastenings which will allow the plate to be detached.
1.
Plates mortised for the passage of the bar are placed upon it at intervals along
its length, and are held in position by wedges or keys. These plates form ribs
which lie within the core-box, and constitute ledges, or shelves, upon and around
which the green sand is packed, and by which the core is firmly sustained upon the
bar while it is being inserted in, the mould and during the operation of casting. The
bar is re-enforced or enlarged laterally at suitable points so as to form tapering.or
wedge-shaped shoulders, which, when the plates are pressed lengthwise, of the bar
and towards its larger end, will wedge or tighten said plates in place.
In forming a core by the aid of the devices embodying my invention the core
bar with its appendages, is inserted within the core-box and the green sand packed
within the box and around.the bar and its attached ribs. The core is then lifted
from the core-box by means of its end-pieces and placed in the mould either edge-
wise or flat, as may be most convenient in casting. The casting is then made, after
which one or both end pieces of the core-bar are removed and the bar itself driven
out of the sand lengthwise, the detachable ribs being loosened in the act of driving
the bar, so that they offer, no resistance to its movement. "When the bar is, thus
removed, the sand.is knocked down and removed from the mould, so that it may be
used over and over again.
"Dated this 321 1
SA 1000
DONALD CAMERON,
Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Device for Forming Green-sand Cores for Railroad
-Journal Boxes..
.
I, DONALD CAMERON, of Victoria Chambers, Chancery Lane, in the County of
London, Manager, do hereby declare the nature of this invention (a communication
to me from abroad by William 'Sterrit, of Pittsburg, Pennsylvania, U.S.A.,
Inventor,) to be as follows:-
This invention has relation to the method and means of making green-sand cores
for railway journal-boxes, and has for its object the provision of novel expedients to
be used in forming the green-sand core whereby a great saving in labour and
material is effected and the usual drying, blackening, handling, and pasting incident
to the use of dry sand are obviated."
My invention consists in the novel construction of an arbor or stem adapted to be
inserted in the core box for the purpose of forming a base, body, or support for the
reception of the green sand constituting the core of a journal-box, the said arbor or
stem being provided with end pieces having strips for lifting the core out of the
box and setting it in the mould, and being also provided with detachable ribs or
bars to retain the sand in proper position upon the arbor or stem, all as hereinafter
more particularly described and specifically claimed.
Fig. 1 is a plan view of my improved corc-bar with its appendages.
Fig. 2 is a vertical longitudinal section of the core-box and core, showing the
core-bar in position.
Fig. 3 is a side view of the core built or formed upon the core-bar.
Fig. 4 is an end view of the core-bar and part of a mould.
In the drawings, A designates the core-box, in which is to be formed the green-
sand core for a railroad journal box. The said core-box is constructed of the usual
or any suitable pattern.
B designates the core-arbor, to which my invention particularly relates, and
which consists of a long bar or beam made of iron or other suitable material and
having tapering sides and one or both of its edges inclined, so as to give the arbor a
characteristic wedge shape, which will facilitate its removal from the core when the
casting is finished.
Upon each end of the bar or arbor B is formed a flat tongue C to receive the
plate D, mortised for the passage of said tongue and formed with a flange d, by
which the bar and the core are lifted from the core-box and placed in the mould.
These plates are secured in position upon the bar by means of wedge-shaped
keys E or other suitable fastenings which will allow the plate to be detached.
FF designate plates mortised for the passage of the bar B, upon which they are
placed and held in position by wedges or keys h, said plates forming ribs which
fie within the core-box and constitute ledges or shelves upon and around which the
green sand is packed, and by which the core is firmly sustained upon the bar B
while it is being inserted in the mould and during the operation of casting. The
bar B is reinforced or enlarged laterally at points gg, so as to form tapering or
wedge-shaped shoulders, which, when the plates FF are pressed lengthwise of
the bar and toward its larger end, will wedge or tighten said plates in place.
In forming a core by the aid of the devices embodying my invention the core-
bar B, with its appendages, is inserted within the core-box in the position shown in
Fig. 1 and the green sand packed within the box and around the bar and its
attached ribs. The core is then lifted from the core-box by means of its end pieces
and placed in the mould either edgewise or flat, as may be most convenient in
casting. The casting is then made, after which one or both end pieces of the core-bar
are removed and the bar itself driven out of the sand lengthwise, the detachable
ribs being loosened in the act of driving the bar, so that they offer no resistance to
its movement. When the bar is thus removed, the sand is knocked down and
removed from the mould, so that it may be used over and over again.

page_text: As shown in Fig. 1 of the drawings, the core-box has contracted ends and the
journal-box will be of similar shape. It is for this reason that I employ detachable
ribs upon the core-bar, as permanent ribs could not be withdrawn from the
casting.
By the use of the devices described one skilled in the art of moulding or core-
making can save fifty per cent. in labour over the old way of making these cores and
also keep the coarse sharp sand out of the moulding sand that the castings are made
in, as according to my invention both core and mould are made out of the same
quality of sand, thereby effecting a still further saving in the manufacture of
journal-boxes.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination, with the tapered core-bar B, of the slotted plates F F,
fitting on the tapered portions of the core-bar, and wedge-shaped keys / h, substan-
tially as described.
in com-
2. The tapered core-bar B, formed with the tapering enlargements gg,
bination with the detachable slotted plates F F, fitting on the tapered portions of
the core-bar, substantially as described.
Dated this 22nd day of January 1891.
DONALD CAMERON,
Applicant.