Improvements in and relating to the Making of Moulds for Casting Metals.
Year: 1899

page_text: Date of Application, 5th Sept., 1899-Accepted, 10th Mar., 1900
COMPLETE SPECIFICATION.
Improvements in and relating to the Making of Moulds for Casting
Metals.
I, HARRY CLIFFORD COOPER, of Austin, Chicago, in the United States of
America, Engineer, 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:—
My invention has for its object the production of a molding machine for use
more particularly in forming sand molds. In its general operation and in some
of its specific operations, it is similar to the mechanism shown and described in
my Application filed September 5th, 1899, No. 17876. It is similar in its general
operation in that from the time the empty flask is inserted in the machine to
the time when the flask containing the formed mold is removed from the machine.
the same operations are performed in substantially the same chronological order.
It is similar in some of its specific operations in that with some changes in the
specific forms of mechanism, the mechanism for dropping the outer false flask,
the inner false flask, the sprues (i.e.. the pins for forming the sprue holes), the
sand, the advancing of the patterns into the flask, the insertion of the vent pins,
the filling of the sand reservoir and the stripping of the parts from the completed
mold are substantially the same. It differs however as stated above in the specific
mechanism for accomplishing the above results in some instances and differs
somewhat more materially in the mechanism for carrying the flask and pattern
parts and advancing the latter into the flask. In the former case also I illustrated
and described two separate machines one for forming the cope and the other the
drag of the mold. In my present application I show and describe a machine
which by changing some adjustments and substituting some of the minor parts
for others, can be made capable of performing several different operations. The
mechanism can be so arranged that it will form both the cope and the drag of
a mold at one operation of a pattern capacity say for sake of illustration, 18 × 36
square or by a change of parts and adjustments the same machine can be made
to form the cope of a pattern capacity of say 36 × 36 square or by a change of
parts and adjustments the machine can be made to form the drag of a pattern
capacity of 36 x 36 square. In other words, there is provided two sets of mold
forming mechanism in the one machine either set capable of forming the parti-
cular kind or kinds of molds desired and these two sets can be combined and
operated to form a single mold. The invention consists in a combination of devices
and appliances hereinafter more fully described and claimed.
In the drawings:
Fig. 1. is an end elevation of my machine.
Fig. 2, is a side elevation of the same.
Figure 3. is a view of the upper portion of the machine partly in elevation
and partly in section looking in the direction of arrow 3. Fig. 1.
Fig. 4, is a vertical section with some parts in elevation looking in the
direction of arrow 4, Fig. 1, and taken substantially on the line 4-4 of Fig. 7,

page_text: Figure 5, is a view of the upper portion of the machine and taken substantially
on the line 5-5 of Fig. 2.
Fig. 5 is a cross section on the line 55 of Fig. 5.
Fig. is a detail illustrating the plunger sprues.
Figs. 5 are details of the plunger and sprue lifting mechanism.
Fig. 6. is a view looking in the direction of arrow 6, Fig. 2 and taken
substantially on the line 6--6 of Figs. 2 and 7.
Fig. 7, is a cross section taken on the line 7-7 of Fig. 6.
Fig. 8, is a plan view of the upper portion of the machine with the parts above
the line 8-8 of Fig. 2 removed,
Fig. 9, is an elevation of a portion of the machine showing the tripping
mechanism.
Fig. 10 is a cross section on the line 10-10 of Fig 9.
Fig. 11 is a vertical section on the line 11-11 of Fig. 10.
Fig. 12. is a view partly in elevation and partly in section illustrating the
construction of the sand delivery boxes.
Fig. 13. is an elevation at right angles to Fig. 12 with some parts in section.
Fig. 14, is a cross section on the line 14-14 of Fig. 12.
Fig. 15, is a plan view of the vent pins plate and sprue holder plate.
Fig. 16, is a vertical section on the line 16-16 of Fig. 15.
Figs. 17, 18, 19, are sectional views illustrating one of the sprues and vent
pins.
Figs. 20, 21, 22 and 23 are views illustrating the construction of the sprues.
Fig. 24, is a plan view of the parts shown in Fig. 23, with the cap removed.
Fig. 25, is a detail illustrating the rack bar for engaging the sprue.
Fig. 26. is an end elevation of a portion of the machine illustrating the relation
of the flask and pattern supporting parts where a single flask is used.
Fig. 27, illustrates the same parts where two flasks are used.
In carrying out the invention A (Figs. 1 and 2) represents a suitable base
plate and A a cylinder supported thereby, having an inlet pipe A2 for the
admission of the power fluid controled by a valve A³, the valve being operated
by the arm A and vertically movable rod A. The apparatus for moving this
rod will be later described. Within this cylinder is a piston and projecting
from the cylinder is a piston rod A carrying on its upper end à suitable plate A'
shown in Figs. 4 and 6. From this plate A, all of the pattern and flask sup-
porting parts are carried. Any desired operating fluid may be used to raise and
lower the piston and its accompanying plate A7 or if desired any other means
such as purely mechanical means could be employed for raising this plate. Such
substitutions are so well known that I will not further describe them. Referring
now to Figs. 1 and 2, it will be observed that arms A8 extend from the cylinder
and these support vertical guide and supporting rods A. Carried by the upper
ends of these rods is a casing B having arms B¹ which are engaged to the rods Aº.
Supported by the casing B are the upper works of the machine. Carried by the
plate A is another casing C (Figs. 1 and 2) and extending therefrom are arms C¹
which engage the guide rods A and thus guide the casing in its vertical move-
ment. It will thus be seen that the machine is comprised of three distinct parts.
to wit the cylinder or base. the upper works contained within the casing B
and supported from the cylinder by the rods A9 and the pattern and flask
supporting and operating parts carried by the plate A and within the casing C
and movable vertically to and from the upper works by means of the piston in
the cylinder. In addition to these three principal parts, there is a casing D
(Figs. 1 and 2) engaged to two of the supporting rods A containing the tripping
mechanism for operating the pattern and flask supporting parts in their vertical
movement. Access is gained to the casing C by means of the doors C20 hinged
to the casing and to the casing 1 by means of the doors D30 hinged to the
casing D. E is the flask shown in sevaral figures among them Figs. 2. 4 and 6.
It is provided with trunnions E' and pins E2 (Fig. 6) the latter adapted to

page_text: insure its registration with the flask support to be later described. This flask
can be placed in position in the machine by any desired means as for instance
the crane mechanism shown in my prior application.
in order that the machine may be more easily understood, I will describe the
various mechanisms in the order in which they operate. In making this pre-
liminary description, I will also describe the parts adapted to make the cope
portion of the flask. We will assume that the flask has been swung into position
ready to be lowered to its place in the machine.
OUTER FALSE FLASK.
E (Figs. 1, 2, 3 and 5) represents the outer false flask provided with rods E
(Fig. 3) passing through and guided by dash cups E supported from the casing B,
the upper end of each rod provided with a plunger E adapted to enter the dash
cup and cushion the descent of the false flask when released. On each rod is an
adjustable collar E7 (Figs. 1, 26 and 27). Pivoted to the casing 15 adjacent to
each rod E is a beveled catch ES (Fig. 26). E is a rod carried in the boxes E¹
on the side of the casing B and movable longitudinally in said boxes. On the rod
adjacent to each beveled catch ES is a shoulder E which when the rod is moved
bears on the catch and tilts it. Surrounding the rod adjacent to each catch is a
spring which bears upon the opposite side of said catch thus allowing the
catch to yield independent of the rod E when it engages the collar on the
rod E. On the opposite side of the casing the above described parts for operating
the catches are duplicated. A shaft E extends through the casing (Figs. 8
and 26) and is connected with each rod E by a link E Extending from the
shaft is an arm E and pivoted thereto is a vertically movable rod E.
Obviously when the latter is moved downward, it operates each rod E to release
the catches Es from the collars E and thus allows the false flask to drop on to
the flask proper.
INNER FALSE FLASK.
Frepresents the inner false flask (Fig. 5) engaged in its upper position by a
beveled catch F pivoted to the wall of the partition B within the casing B
(Figs. 3 and 5). The end of this beveled catch terminates adjacent to the shaft EB
previously described (Fig. 5) and on this shaft is an arm which when the
shaft is revolved strikes the bevelled catch Ft tilts it out and releases the false
flask F. The latter is provided with guide rods F2 passing through the dash
cups (Figs. 3 and 5) and each provided on the upper ends with a plunger 14
which entering the dash cup, cushions the false flask when it drops. The latter
drops down on to the runner box of the flask. I have not shown this runner
box since it is fully described in my previous application.
SAND DELIVERY BOXES.
Referring now to Fig. 8, B2 and 13 represent vertical partitions within the
casing B. Located between these partitions are the sand delivery boxes G shown
in detail in Figs. 12 13 and 14. Projecting from the face of the sand box G is
a lug G carrying a set screw G2 which bears upon the false flask. Journaled
in the partitions - are beveled anti-friction rollers G³ to relieve the friction
when the boxes are moved vertically. Since the sand delivery boxes thus rest
on the false flask, they are held in their upper position thereby and a plate G13
is, engaged by screws to the bottom of each sand box and when the boxes are
in their normal or upper position these plates close the openings in the pressure
plate through which the sand boxes drop. The bottom of each box is inclined
or curved as shown by dotted lines Fig. 12 and as shown by full lines G Fig. 8
and 14. the incline for one box being in the opposite direction to that of the other
box. The side of each box at the base of the incline is provided with an
opening G through which the sand is discharged. A stop G6 engaging a corre-
sponding stop G7 on the partition B limits the upward movement of the box

page_text: and a stop Gs on the partition limits the downward movement of the box. Con-
necting with the sand reservoirs (which I will presently describe) is a sand
chute the latter being supported by the casing B and the box G fits over
and telescopes with this sand chute. Now it is obvious that when the false flask
drops, it will allow the sand delivery box to drop down until arrested by the
stop G. This leaves the upper edge of the opening in the sand box just below
the pressure plate 13+ so that when the sand is discharged from the reservoir as
will be later described, it comes down through each box and is discharged
laterally (and in opposite directions) into the false flask and flask proper. It will
be observed by reference to Figs. 8 and 14, that in addition to the incline G in
each box the end, is inclined at right angles as at G (Fig. 13). The object of
this incline is to carry the sand away from the edges of the flask. It also has
another object. The end of the box opposite to this incline Go is provided with
a removable door or slide G₁ so that when the machine is used to form the cope
of a mold having a ruuner box the latter can be supplied with sand through the
opening left by the removal of the doors or slides G. The incline G
direct the sand through these openings. Of course when the machine is not
used with an inner false flask these openings are closed.
SPRUES AND PLUNGER.
will
Supported by the partitions B-B³ (Fig. 5) is a vertical casing B, constituting
what I will term the plunger casing, and moving vertically in this casing is a
plunger H. This plunger and its accompanying sprues is of substantially the
same construction as in my former application, the plunger being adapted to drop
down and fill the runner box of the flask in forming the cope portion of the mold
and there being three sprues H¹ (Fig. 5) engaged to a fitting H² which moves
vertically in the plunger, the fitting being cushioned by a piston H³ which enters
the dash pot H in the lower end of the plunger. Engaged in the lower end of
the casing B is a plunger stripping plate B constituting the bearing for the
lower end of the plunger. Supported by the upper end of the casing B is a
plate H having a bearing 136 in which is located what I will term a crank
spool H, a pitman Hs being pivoted to the crank on the spool. Extending
through the spool H is a shaft H having on its end a beveled gear H0 which
meshes with the beveled gear H" on the vertical shaft H. On the end of the
spool H is a disc 1. On the end of the shaft H is a crank arm H" and
pivoted thereto is a pitman H. He is a fitting traveling on the guide rods H",
the lower end of the pitman being pivoted to said fifting H. Located in this
fitting is a vertical rod or shaft H18 capable of turning on its vertical axis with
a spring H for keeping it normally in one position. On the lower end of this
rod is an arm or foot H20 while on the upper end is another arm or foot H¹
(Figs. 5 and 5). On the sprue fitting H2 is a vertical stem H having notches H2
in its face in which the foot H20 engages. On the face of the disc HB and at
a distance of 90 degrees from each other are two stops H2 and on the crank
arm Hare two arms H2 extending outwardly therefrom in opposite directions
(Fig. 5). These arms come in contact with the stops H2 so that when the
shaft H is revolved, it will at certain points pick up the disc H and revolve the
spool. The pitman H8 is pivoted to a plate H so that when the spool is revolved
the plate H will be raised or lowered as the case may be. Pivoted in this
plate H2 is a beveled catch H27 the lower end terminating below the plate and
adapted to engage the flange H28 on the upper end of the plunger. Extending
through the casing B above the plate H (Fig. 5) is a lever He said lever being
engaged to the vertical rod H. This rod extends down to a point inside the
casing and terminates adjacent to the horizontal shaft E18 (Figs. 8 and 26). This
shaft through the link E is revolved by the motion of the rod so that
when the rod E16 is moved downwardly to revolve the shaft. E, the shaft E¹s will
also be revolved. On this shaft E18 is a vertical arm H³1 (Fig. 5* and in dotted
lines Fig. 8) and on the lower end of the rod 130 is a horizontally extending

page_text: arm H these two arms being connected by a rod H so that a partial revolution
of the shaft E18 will revolve the vertical rod H30 and throw the arm H against
the arm H and thus release the foot. H20 from the notches in the sprue fitting.
Extending also through the casing 13 adjacent to the catch H is a lever H
adapted when tilted into the casing to strike the catch H27 and release the
plunger. This lever H is engaged to a vertical rod H on the lower end of
which is a horizontal arm H connected by a rod H with a vertical arm H40
on the shaft E. The engagement between the arm H and the rod His
slotted so that the rod will move the length of the slot before it begins to act
on the arm H and thus revolve the rod H. The purpose of this is to enable
the sprues to be released slightly in advance of the release of the plunger. It
will be seen by the above description that when the rod E16 is pulled down, it
first releases the sprues and subsequently the plunger.
SAND RESERVOIR.
J (Fig. 3) represent the sand reservoirs each provided with discharge and inlet
doors or valves. The particular construction of these,doors or valves in this case
is immaterial since they may be duplicates of the doors or valves in my former
application and may be operated in the same way. The discharge set as in
the former case is released or opened by a revolution of the rod J³ (Figs. 3 and 8)
the arm striking the catch 1. This tilts the catch away from the gear Jes
and allows the doors to open, the revolution of this rod being obtained by means
of a vertical arm J on the shaft E connected by a rod J with the arm Jo on
the lower end of the rod J. Of course the mechanism just described is duplicated
there being one set for each reservoir.
Pivoted to the casing by the stud C2 is a sleeve C (Fig. 7) having two arms
one of which C curves outward and upward and is provided on the end with a set
screw C and the other arm C extends outward and bears upon the arm C
(Fig. 11) on the end of the rod E6 previously described. Projecting from the
flask is a lug 20 (Figs. 4, 9 and 26) which as the flask is lowered to its place in
the machine strikes the set screw 0 tilts the lever C6 and thus draws down
the rod E 21 (Figs. 10 and 11) is a spring surrounding this rod and keeping
it normally in its upper position so that as soon as the Hask is withdrawn the
spring E will return the parts to their normal position.
It will be seen from the above description that with the lowering of the flask
to its place in the machine, the outer false flask (where the cope part of the mold
is being formed) the inner false flask, the sand delivery boxes, the sprues and
the plunger are all released and allowed to drop down and at the same time the
sand is released and fills the flasks. We are now ready for the movement of the
pattern parts to form the mold.
PATTERN OPERATING MECHANISM.
The flask and pattern supporting parts are shown principally in Figs. 4, 6
It should
and 7, each one being a sectional view at right angles to the others.
be understood at the outset that in the present machine there are virtually two
sets of pattern and flask supporting mechanisms and while they are duplicates of
each other and are both carried by the plate A yet by a change in the adjustment
of the tripping mechanism, they may or may not operate in the same relative
order. In describing them, I will describe only one set but since in Figs. G
and 7. one set is shown in section while the other set is shown more or less in
elevation, I will in describing, refer to whichever side shows the parts more
clearly. Supported from the plate A are standards AA" and carried in
bearings on the upper ends of these standards is a crank shaft A2 and pivoted
on the cranks thereof are pitmen A13 the lower ends of said pitmen being pivoted
to a frame K. Fitting over the exterior of this frame which is circular in form
is a ring Khaving its exterior surface threaded and held in place by the ring. K²

page_text: fastened to the frame K by screws. K is a frame adapted to fit the exterior of
the ring and threaded to engage the same. Carried by this frame are the
arms which are provided with rods K and extend up through the bearings (7
on the casing C. Above each rod K5 is another rod K which extends through the
plate C on the upper end of the casing C. The rods K are free to move vertically
and to their upper ends is engaged the frame K7 which forms the lower sand box
or lower false flask and the Hask support. K8 is another ring exteriorally
threaded to fit interior threads on the frame K. M is another frame bored
vertically as at M to receive the guide stem M² which extends up from the
plate A At the initial stage in the operation, this frame M rests on and is
supported by the frame Ks which extends up from the frame K. Extending up
from the frame M are four standards M³ (Fig. 7) having their faces beveled
to fit in the guides C on the interior face of the casing C. In addition to the
four standards just described, there are two other sets of standards of four each M⭑
and Mall extending up from the frame M. The 12 standards just described as
extending up from the frame M constitute one set of pattern supporting
mechanism. The standards M³ are provided on their upper ends with strips M
while the standards M-Mare provided with a rectangular frame M. Of course
as the frame M moves vertically, these pattern supporting strips MM will
move vertically. Journaled in suitable bearings in the frame M is a crank
shaft Ms and pivoted to the cranks thereof are pitmen M their upper ends
being pivoted to a ring M interiorally threaded as at M and provided
with an adjustable ring Me threaded to fit the threads M. Extending up from
the frame M is a hollow cylindrical bearing M13 around which the ring 12 fits
and by which it is steadied and guided. is another frame having a down-
wardly extending stem which is guided by the cylinder M. This frame O
is carried by the ring M. Extending up from the frame O are 16 standards (2
each corner standard working along the interior face of a standard M³ and
the frame being thereby steadied and guided. Each longitudinal set of four of
the standards 02 carry on their upper ends a strip 03 so that there are four of
the pattern supporting strips 03 supported from the frame 0. Extending from
the upper ends of the standards A-A" are standards P which support a
pattern supporting strip P¹. Extending from the plate CS is a ring or frame (10
and supported by the upper edge of this ring is a plate C constituting the
stripping plate. The frame or ring Co is attached to the plate C8 and thus forms
a guide for the flask support or lower false flask K. By referring to Figs. G
and 7 it will be seen that the frame C is a double frame that is, there is one for
each set of pattern mechanism, so that if the machine is used as a double
machine there will be a guide for each flask support. Each of the two frames Clo
is however cut away as at C+ so that when but a single flask is used, employing
the entire width of the pattern mechanism the patterns will have space in which
to move.
It will be observed from the above description that the flask support or lower
false flask K is carried by the frame K, and that the latter can through the
crank shaft A be stopped in its upward movement at any time that said shaft
is tripped. It will also be observed that the pattern supporting strips M-M7
are carried by the frame M which latter is carried at the initial stage of the
operation by the frame K so that when the frame K ceases its upward movement
with respect to the pressure plate above, the pattern strips MM cease their
upward movement. It will be further observed that the pattern supporting
strips are carried by the frame which in turn is carried from the frame M
by the crank shaft MS so that when the crank shaft Ms is tripped the pattern
strips will cease their upward movement with respect to the pressure plate
above. If desired the pattern supporting strips M6-M7-03-P1 may be provided
with orifices employed either to guide the pattern parts or to secure them. I will
now describe the tripping mechanism whereby the crank shafts A and Ms are
tripped at the desired time.

page_text: TRIPPING MECHANISM.
As previously explained the casing D containing the tripping mechanism is
engaged to the upright standards A. This tripping mechanism is shown in
detail in Figs. 9, 10 and 11. Located on the interior of the casing D) is a peculiar
shaped rack bar D' shown in elevation in Fig. 9. On the shaft A which projects
through the slot C12 of the casing C is a peculiar shaped segment 12 having an
arm 1 set out of the vertical plane of the segment portion 1*.
At the upper
end of the rack bar I is an adjustable screw stop D in line with the arm D and
adapted to be struck, thereby. "Now as the shaft A2 ascends at the proper time
depending upon the adjustment of the screw D the arm D³ strikes the screw D
and revolves the shaft. As soon as the shaft is thrown off its center, the weight
of the parts thereon will give it a half revolution and this will bring the
arm of the segment D around so that it bears on the upper end 17 of the
rack bar. Then as the shaft descends later on, the segment D will engage
the rack portion D8 of the rack bar and revolve the shaft back to its normal or
initial position the end 19 of the segment riding against the face D10 of the
rack bar. Surrounding the shaft A2 is a sleeve A4 (Fig. 4) having on its end
a bevelled gear A which meshes with the beveled gear A on the vertical
shaft A
Carried by the frame M is a sleeve M14 which carries a beveled
gear the latter engaged to the shaft A by a feathered engagement M50 so
that it will revolve with the shaft and be capable of moving vertically thereon.
Meshing with the beveled gear M5 is another beveled gear M6 located on the
shaft Ms. On the sleeve A is another segment " (Figs. 10 and 11) a duplicate
of the segment D2 and adjacent thereto; on the casing I) is another rack bar 12
corresponding with the rack bar D', said rack bar Drovided with an adjustable
stop screw D. The operation of tripping the shaft MS is identical with that of
tripping the shaft A. By regulating the respective heights of the set screws D
and D, shafts M8 and A2 can be tripped at the desired time. Surrounding the
depending stem bearing M (Fig. 4) is a ring Q and pivoted thereto are rods or
hangers Q (Fig. 6) which extend up and are engaged to the cranks on the crank
shaft 2. This shaft has its bearing at the ends in the bearings Q3 on the interior
of the casing C and at the middle in the bearing Q carried by the upright
standard Q on the plate A On the shaft Q2 is a beveled gear Q which
meshes with a beveled gear Q7 (Fig. 7) on the shaft Q8 the latter
extending out through a slot CB (Fig. 9) in the casing C into the tripping
casing 1).
Here it is provided with a segment D" corresponding with the
segments D2 and D and on the casing adjacent thereto is a rack bar D corre-
sponding with the rack bars D and D. There is also provided an adjustable
set screw D but instead of this set screw being mounted on the rack bar and
adapted to be struck by the segment in ascending the set screw 116 is located
on an arm on the rod R which as hereinafter explained is at a given stage in
the operation moved downward and this causes the set screw 16 to tilt the
shaft Q2. Before describing the operation of the pattern supporting parts. I
will call attention to the fact that each of the frames carrying the pattern and
flask supporting parts is provided with a dash cup to cushion its descent when it
is tripped. Located on the plate A is a circular dash pot AIS (Fig. 4) provided
with vertical partition A extending entirely around the same so that it is
divided into two compartments. In the outer compartment A20 is a circular
ring A which constitutes a piston for the compartment A20. This ring A¹ is
connected with the frame K by means of the rods K engaged to lugs on the
inner face of the ring K8. The inner compartment A of the dash pot is
provided with a similar ring A2 and connected with the ring Q by the rods Q2.
Located on the frame M are two dash pots Ms for cushioning the frame M10,
rods M extending from said frame M down to the dash pots. The frame. M
needs no cushioning because it is either carried by the frame K or by the ring Q.
OPERATION OF FORMING MOLD.
The operation of the pattern and flask supporting parts will now ho undaustanl

page_text: Pivoted to the casing D is a shaft D (Fig. 11) having a handle D¹s and an
arm D and pivoted to the arm D19 is the rod As previously described which
connects with the valve arm At for the main cylinder. By tilting the handle D¹B
the power fluid is admitted to the cylinder and the piston is forced upward
carrying with it the plate A and all the accompanying parts. The patterns are
of course adapted to rest on the pattern supporting strips. These patterns are
(as described in my previous application) divided into as many parts as necessary
in order to get the proper compression of the sand in the mold upon each
particular height of the pattern. As fully claborated in my previous application,
the secret of successful machine 'molding is to secure above each particular
height of the pattern that compression of the sand which is requisite when the
iron is poured to properly mold the latter. It should also be remembered that
with a stationary pressure plate above so long as the pattern parts and flask are
all moving toward said stationary plate, the compression will be along the
pressure plate or in other words, in the top of the flask that when any
particular part of the pattern ceases its movement toward the pressure plate,
the compression above that part ceases; and that whenever any pattern part
is moved toward the pressure plate with the flask remaining stationary with
respect to the pressure plate, the compression of tlie sand will be along the face
of the pattern or in other words, in the lower part of the flask. Now as previously
explained, in addition to the flask supporting rods K which carry the rods K but
can move down independent of the latter, there are three sets of pattern sup-
porting parts. There is the strip P which is supported from the plate A and
movable only therewith. There are the strips 03 which are carried by the
frame O and the latter is carried by the crank shaft Ms on the frame M so that
when the crank shaft M8 is tripped as previously explained, the strips 0³ will
give way or in other words, remain stationary with respect to the pressure plate
above while the rest of the parts continue to advance. There are also the
strips MM which are carried by the frame M and the latter being carried
by the frame K which is in turn carried by the crank shaft A2. When the crank
shaft is tripped the strips M6 M7 will remain stationary with respect to
the pressure plate above while the strip P1 and plate C8 on the casing C continue
to advance. Of course when the strips M-M cease their upward movement the
flask also ceases its upward movement. In the meantime however, when the
shaft A is tripped and the frame K thus caused to cease its upward movement,
the frame Q is still advancing and it picks up the frame M and carries it away
from the frame K thus carrying upward the pattern supporting parts including
M M and 03 while the flask remains stationary with respect to the pressure
plate. Now as will be seen the movements M-M and 03 and the flask depend
entirely on the time when the shafts M2 and M8 are tripped. If it is desired
that the strips 03. M and M7 shall remain in the same relative position, the
shaft A alone is tripped. This will cause the flask and the strips M6-M-03
to stand still while the strip P advances until the frame Q picks up the frame M
when all the parts will be advanced leaving the flask alone stationary: or on the
other hand, if it is desired to have the strips 03 cease their upward movement
first then the shaft MS is tripped first while the strips PM and M and the
flask continue to advance until the frame is overtaken by the ring Mon
the frame M and then the shaft A2 can be tripped and this will cause the flask
and parts M and M and 03 to stand still while the part P1 is advancing until
the frame Q overtakes the frame M when all the pattern strips will be advanced
leaving the flask stationary. Or on the other hand if it is desired that the
strips 03 shall cease their initial movement when the strips M-M cease their
movement and shall remain stationary when the strips MM later again begin
their upward movement, the operation would be to trip the shafts Ms and A¹2
substantially simultaneously. This would cause the strips 03-MM and the
flask to cease their movements while the strip P¹ advances but as soon as the

page_text: frame Q overtakes the frame M, it would cause the strips M6-M to advance while
the pressure above the strips 3 would prevent their advance until the frame V
had through the ring picked up the frame 0 when all the parts would
be advanced with the flask remaining stationary. In addition to the above, it
will be seen that by adjusting the height of the ring M the frame can be.
adjusted at such a height that even when the shaft Ms is tripped thus allowing
the strips to remain stationary with respect to the pressure plate, the ring M
on the frame M will not reach the frame O until the plate A7 has reached its
maximum height so that after the initial advance of the strips and when they
are tripped they remain stationary with respect to the pressure plate throughout
the balance of the operation. From the above description it will at once be seen
that by providing the patterns with suitable legs or engaging portions any
pattern piece can be successively advanced toward and held stationary with
respect to the pressure plate for any desired length of time and that thereby the
sand either along the top of the flask over any pattern part or along the face
of the pattern over any pattern part can be given any desired compression.
INSERTION OF THE VENT PINS.
Projecting from the face of the casing C (Fig. 7) is an arm R, pivoted at R¹
to swing horizontally and provided with a spring R2 adapted to keep it normally
against the face of the switch which I will presently describe. Extending
vertically through the casing D) (Fig. 9) and adjacent to the side of the casing C
is a rod R pivoted on its upper end to the arm R on the shaft R7 the latter
provided with a handle Rs. The lower end of the rod R is pivoted to the valve
arm of the valve in the cylinder R, (Fig. 1). On the rod A is a shoulder R10
(Fig. 11) and the shoulder R* of the arm R comes in contact with this shoulder R10
when the casing C moves upward and thus moves the rod R upward and this
opens the valve and allows the fluid to enter the cylinder R", and raise the
piston. The piston rod R extends through the casing D to the upper part of
the machine where its purpose will presently be explained. In order that the
arm R on the casing C shall not interfere with the rod R when the casing
descends. I provide a switch shown by dotted lines Fig. 9, the switch point Re
keeping the end. R³ of the arm out into the path of the projection R so that
the arm R will move the rod up in its upward movement but as soon as the
arm Rhas cleared the switch R the spring R2 throws the arm Rover so that
its end R³ rides against the track R and when the casing and arm R.descend
they are thus caused to clear the projection R. This switch mechanism is
clearly described in my previous application and I will not further dwell upon
it. Journaled. in the casing B is a shaft R Fig. 1 provided on its end with a
crank arm R connected with the rod R by a link R. On the shaft R (Fig. S)
is a pinion R7 and meshing therewith is a pinion R18 on the shaft R, the latte:
journaled in the frame. The pinion R18 meshes with the pinion R20 on the crank
shaft R2. On the opposite side of the sand box is another crank
shaft R having a pinion R which meshes with the pinion R so that a move-
ment upward of the rod R revolves the crank shafts RR. Pivoted to the
cranks of these crank shafts are pitmen R2 (Fig. 5) and pivoted to the ends of
these pitmen are what I will term the vent pin boards R. These vent pin
boards are guided in their vertical movement by the guides R (Fig. 8) working
in guide ways R26 on the outer casing B and on the inner partitions BB
The construction of the vent piu boards so far as the vent pins are concerned is
substantially the same as in my previous application. They are shown in detail
in Figs. 17 and 19 and consists of a main plate R2 with clamping strips R28 and
tightening strips R29 held by screws R. The vent pins Rai can of course be
adjusted to any height desired. Now as just explained when the casing C moves
upward it operates through the rod R to force the vent pins down into the mold
the vent pins of course passing through suitable orifices in the pressure plate B*.

page_text: MECHANISM FOR FILLING THE SAND RESERVOIRS.
Located on the shaft R2 (Fig. 3) is a pinion R which meshes with the
pinion R on the shaft R34. On the same shaft is a beveled gear R which
meshes with the beveled gear R on the vertical shaft H2. The latter has been
explained in connection with the plunger. Located also on the shaft Rare
twe beveled gears RR there being one for each of the sand reservoirs. Each
gear is mounted on a vertical shaft R. On the trunnions of the sand doors are
segments RR which mesh with the gear R having a beveled gear
segment R on its face which meshes with રો beveled gear R60 oll
the shaft R. The shafts R1 and R are connected by the gear R2 and seg-
ment R so that a revolution of the shaft R operates the sand doors. The
mechanism for operating the sand doors to fill the sand reservoirs is identical to
that described in my previous application and inasmuch as it is not claimed in
this case, I will not further describe it. Suffice to say that a revolution of the
bevelled gears R R through the medium of the bevelled gears R_R
operates the sand doors so that as the vent pins descend, the lower sand doors
are closed and the upper sand doors open thus allowing the reservoirs to fill
while as the vent pins are withdrawn the upper sand doors are closed. Of course
while I have described the insertion of the vent pins after the description of
the formation of the mold yet the arm R is so located on the casing that it
causes the vent pins to operate considerably in advance of the pattern. I have
also explained how the shaft H is revolved when the vent pins are being inserted.
This revolution of the shaft H2 revolves the shaft H (Fig. 5). This revolution
of the shaft H causes one of the arms H2 to come into contact with the
shoulder H2 on the spool H and revolves the latter thus throwing the plate H2
down to its lower position. Now as the plunger H is forced up by the upwardly
moving flask, or perhaps more correctly speaking, the sand in the flask, the upper
end of the plunger strikes the plate H26 and is held from further upward move-
ment thus compressing the sand in the runner box of the flask. The particular
point at which the plunger is arrested in its upward movement is regulated by
the screw ring H on the upper end of the plunger which can of course be adjusted
to any height desired. When the plunger reaches the plate H26, the beveled
catch H engages the plunger as previously explained. It will be seen that thus
far we have formed the mold, inserted the vent pins and filled the sand reservoirs.
We are now ready to withdraw the vent pins and strip the sprues, plunger and
patterns.
STRIPPING MECHANISM.
The operator by means of the handle Rs (Fig. 9) throws down the rod R and
this reverses the valve in the cylinder R allows the fluid to enter above the
piston and pull down the rod R". Through the mechanism previously described,
this revolves the crank shafts RR and withdraws the vent pins. It also
revolves the shaft H in the opposite direction. Now when the shaft H2 is
revolved, this reversed revolution thereof causes the rod H connected with the
crank arm H4 on the shaft H to withdraw the sprues along the face of the
plunger until the arm H25 comes in contact with the other shoulder H2 on the
disc H when the spool will be revolved and the plunger lifted, the latter
stripping through the plate B6.
As previously explained the adjustable screw or pin D16 which operates the
segment D is located on the rod R and as will be remembered it is the down-
ward movement of this rod that withdraws the vent pins, sprues and plunger.
It will also be remembered that the segment 14 when revolved trips the
shaft Q and that at the completion of the operation of forming the mold the
pattern supporting parts MM7 and 03 are all supported from the frame Q and
consequently the shaft Q2. Now when the rod R moves downward, the pin D16
trips the shaft Q and this permits all those pattern parts that are supported from
the strips MM and 03 to .drop away from the mold. If the pattern is of

page_text: such a nature or shape that is desired to keep any portions of the pattern into
the mold to support the sand until the other portions have dropped out, the
patterns can be so arranged as to be supported at the closing movement of the
operation of forming the mold either by the plate CS or strip P¹. As soon as the
rod R has tripped the shaft Q, the arm RH (Fig. 1) on the rod R comes into
contact with the stop R on the rod A and depresses the rod A thus opening the
valve in the cylinder A¹ and allowing the pressure fluid to escape and thus allow
the plate A to descend. In order that the arm R can clear the stop Re when
it ascends, a switch arrangement R similar to that already described and similar
to those in my previous application is provided.
DRAG MACHINE.
Throughout the above description I have assumed that the machine was adjusted
to form the cope portion of a mold which would take substantially the entire
capacity of the machine, that is to say, I have assumed that the plunger would be
in operation and that but a single flask proper would be in the machine. I now
wish to call attention to the fact that in case the drag portion of the mold is to
be formed which will require a flask substantially the size of the machine, it is
only necessary to disconnect the tripping devices for the inner false flask, the
plunger and the sprues accompanying the plunger and to remove say the gear R36.
Then when the sand has been let into the Hask a bottom board shown at S
(Fig 26) can be inserted. This bottom board can be the same construction as
that shown in my prior application with orifices to allow the vent pins to pass
through. In order that after the pressure has taken place and after the false
flask has been forced up past the bottom board and brought the latter down
to the flask proper, the false flask can be lifted off from the flask to permit the
bottom board to be clamped on to the flask proper, I provide on the casing C
rods S, Fig. 1, which coming in contact with the adjustable screws S, Fig. 3.
on the false flask lift the latter away from the flask proper and allow the bottom
board to be clamped to it.
Again supposing that instead of a single pattern made up of several nieces, it
is desired to form the cope mold of several distinct patterns using but a single
flask that is one that substantially fills the machine, I leave the plunger and its
accompanying sprues still disconnected and fill up the opening in the pressure
plate through which the plunger and its accompanying sprues pass thus making
a practically solid pressure plate. Obviously when this is done, it is necessary
to provide at the necessary points other sprue holes and this is accomplished by
the following mechanism:
AUXILIARY SPRUES.
In the pressure plate at the desirable points are orifices which when these
additional sprues which I will term auxiliary sprues are not in use are plugged
by means of the plugs T (Figs. 5 and 18). When however, it is desired to use
these auxiliary sprues I remove the plug T and insert a plug Tharing an
orifice through it, through which the sprue T can pass and strip. Each of these
auxiliary sprues T is constructed as follows (Figs. 20 to 25): It is hollow as in
my previous application and extends through a tube T which is screwed into
the vent pin board or frame R27. On the upper end the tube T is provided with
a ring T to form a guide in its movement through the tube T. It also forms
a shoulder by means of which the sprue is held in its upper position. On the
interior of the sprue T2 is a shoulder T and threaded into the cap T6 of the
tube T is a fitting with a vertically movable stem 18 therethrough and a
spring To one end bearing on the end T10 of the stem T8 while the other end bears
on the adjustable fitting T. Journaled in the bearings or lugs T of the
tube T3 is a rod T2 and engaged to this rod is a door T adapted to fill an opening
in the side of the tube T and having its interior face notched or provided
with a series of beveled catches T. The shoulder T on the upper end of the

page_text: sprue engages on one of these catches T and the sprue is held up thereby, a
spring T keeping the parts in engagement until intentionally released. Adjust-
ably keyed to the rod T is an arm Te Journaled in the casing B (Fig. 8)
along the side thereof is a shaft T7 having an upwardly extending arm T18
connected by the rod T with an upwardly extending arm T20 on the shaft E18.
On the opposite side of the casing is another shaft Ta having an upwardly
extending arm T25 connected by the rod T2 with an upwardly extending arm T
on the shaft E. Located on the rods T1 and T2 are depending arms T23 adjust-
able along the rod. Now as the shafts E and E18 are timed to release the false
flask and other parts, the arm T3 striking the arm T16 revolves the rod T opens
the door T3 and allows the sprue to drop, the spring To starting it quickly in its
descent. As in my previous application, the sprue drops over a projection T
on the pattern and is at once cushioned and held in place. From the above
description it will be seen that these auxiliary sprues can be located at any
point desired since the arms T18 T20 carrying the rod T can be adjusted to any
point desired on their respective shafts and their number can be increased as
desired and the depending arms T can be adjusted at any point along their
respective rods and their number increased or decreased as desired. So also the
orifices for the sprues through the vent pin board and pressure plate can be made
at the desired point. When the vent pin board is thrown down to insert the
vent pins as previously described. the tubes T3 and their accompanying engaging
mechanism are carried down so that when the sprues T3 are carried up by the
ascending pattern mechanism, each will be engaged and when the vent pins are
withdrawn as previously described the sprues T2 are also withdrawn.
DOUBLE MACHINE.
Another feature of the machine to which I have briefly alluded and which
I will now more fully described is the fact that it is a double machine, that is,
there are two sand delivery boxes, there are two sets of pattern and flask
supporting mechanism and two sets of vent pins and auxiliary sprues.
Now by
substituting for the single flask shown for instance in Fig. 26, two flasks as
shown at U-U1 Fig. 27, both the cope and the drag portion of the mold can be
simultaneously formed. When this is done the plunger and its accompanying
sprues and the inner false flask will remain disconnected and out of use. In that
event however, the plate which has been inserted in the pressure plate to fill the
opening through which the plunger when in use passes, will be removed and
the bottom plates G13 on the sand boxes will also be removed. These removals
are to permit the inner edges of each of the two false flasks 2-3 to pass up,
past the pressure plate and past the lower edge of each sand box to be engaged
by their respective catches. For the same reason also the partition B10 Figs. 8
and 13 which connects the partitions B2-13 is cut away as at B. It will be
remembered that I described the sand delivery boxes as being returned to their
upper or normal position by the upwardly moving sand and held up by the false
flask striking the screws G. When however two flasks are used such as I am now
describing the sand delivery boxes are between the two flasks. the false flasks
in their ascent will strike the screws G12 instead of the screws G2 and will carry
the boxes up and hold them thereby. Of course when the two flasks are used one
to form the cope and the other the drag portion of the mold, the casing on that
side which is forming the drag portion of the mold must be provided with rods U4
to engage the false flask and lift it off from the flask proper so that the bottom'
board can be clamped on to the flask as previously explained.
CONCLUSION.
It will be seen from the above description that I have produced a machine
which will form a mold (either cope or drag) from a pattern of any conceivable
shape and of any size within the limits of a flask that fills the entire machine
3.20
100

page_text: parts of the pattern; one in which the number of small molds in a single flask
is limited only by the size of the flask and irrespective of the difference in size
or height of the different patterns and one in which both the cope and drag
portions of the mold may be formed either of a single mold or of any number of
molds in a single flask depending only on the size of the flask.
It is obvious as in my former application that while I have shown a stationary
pressure mechanism above the flask and movable pressure mechanism below the
Hask, I do not wish to be limited in this direction since many of the parts might
be reversed or changed or altered without departing from the spirit of the
invention.
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 a molding machine two or more sets of pattern and of flask supporting
mechanisms, each set comprising two or more pattern supporting parts movable
independently of each other and vertically movable mechanism from which all
the pattern parts are supported, substantially as described.
2. In a molding machine two sets of pattern and flask supporting mechanism
each set comprising two or more pattern and flask supporting parts, pressure
mechanism above said pattern parts, common supporting mechanism for all the
pattern and flask supporting parts; mechanism for moving the pattern and flask
supporting parts relatively to tlie pressure mechanism and independent tripping
mechanism for each set of pattern and flask supporting parts, substantially as
described.
3. In a molding machine two sets of pattern and flask supporting mechanism
each set comprising two or more pattern and flask supporting parts, pressure
mechanism above said pattern parts, common supporting mechanism for all the
pattern and flask supporting parts, mechanism for moving the pattern and flask
supporting parts relative to the pressure mechanism and independent sets of
tripping mechanism one set for each set of pattern and flask supporting mechanism,
each set of tripping mechanism comprising independent tripping mechanism for
each of the pattern and flask supporting parts, substantially as described.
4. In a molding machine a vertically movable plate or head carrying two sets
of pattern and of flask supporting mechanisms each set comprising two or more
flask and pattern supporting parts movable independently of each other and
common stationary pressure mechanism above the parts. substantially
described.
us
5. In a molding machine a vertically movable head or plate carrying two
sets of pattern and flask supporting mechanism each set composed of two or more
pattern and flask supporting parts movable independently of each other, common
stationary pressure mechanism above the parts and tripping mechanism for
tripping the parts independently of each other as they ascend, substantially as
described.
6. In a molding machine two sets of pattern and flask supporting mechanism
each set comprising two or more pattern and flask supporting parts all carried
from a common vertically movable part, said pattern supporting parts movable
independently of each other, pressure mechanism above said pattern parts:
mechanism for moving the pattern parts with respect to the pressure mechanism
to effect the compression and common mechanism for simultaneously tripping the
parts in both sets after the compression has been completed, substantially as
described.
7. In a molding machine a vertically movable head or plate carrying two sets
of pattern and flask supporting mechanism each set composed of two or more
pattern and flask supporting parts movable independently of each other, common
stationary pressure mechanism above the parts, tripping mechanism for tripping
the parts independently of each other as they ascend and common mechanism for

page_text: tripping the parts in both sets simultaneously after the compression has been
completed, substantially as described.
8. In a molding machine the combination of an outer and an inner false flask;
mechanism for engaging each in its upper position and mechanism for releasing
said engaging mechanism to allow the Hasks to drop simultaneously, substantially
as described.
9. In a molding machine, the combination with the flask proper of an outer
and an inner false flask; mechanism for suspending each in the machine above
the flask proper, a projection in line with the movement of the flask proper:
mechanismi adapted to be struck thereby and connections between said projection
and the suspending mechanism for the false flasks whereby the movement of the
flask mechanism releases the false flasks and allows them to drop, substantially as
described.
10. In a molding machine the combination with the flask and pattern
mechanism of a vertically movable plate above the flask carrying a series of vent
pins and a series of sprues carried by said plate and movable independent thereof,
substantially as described.
11. In a molding machine the combination with the flask and pattern
mechanism of a vertically movable plate above said flask carrying a series of vent
pins, one or more sprues adapted to move in said plate, mechanism carried by
said plate for engaging the sprue or sprues in their upper position and mechanism
for releasing said sprue er sprues to allow them to drop independent of the move-
ment of the plate, substantially as described.
12. In a molding machine the combination with the flask mechanism adapted
to be moved to its place in the machine, of a vertically movable plate located
above the flask mechanism, a series of vent pins carried by said plate, one or
more sprues carried by said plate but movable independent thereof, engaging
mechanism for said sprue or sprues, an engaging portion in line with the move-
ment of the flask mechanism and connections between said engaging portion and
the sprue engaging mechanism whereby a movement of the Hask mechanism
moves the engaging portion releases the sprue or sprues and allows the latter to
drop independent of the movement of the plate, substantially as described.
13. In a molding machine the combination with the flask mechanism adapted
to be moved to its place in the machine, of a vertically movable plate located
above the flask mechanism a series of vent pins carried by said plate, one or more
sprues carried by said plate but movable independent thereof, engaging mechanism
carried by said plate for said sprue or. sprues, an engaging portion in line with
the movement of the flask mechanism and connections between said engaging
portion and the sprue engaging mechanism whereby a movement of the Hask
mechanism moves the engaging portion, releases the sprue or sprues and allows
the latter to drop independent of the movement of the plate, substantially as
described.
14. In a molding machine the combination with the flask and pattern supporting
mechanism and the false flask of rods extending up from the flask and pattern
supporting mechanism adapted to engage and lift the false flask at the latter end
of the movement of the flask and pattern supporting mechanism, one of the
engaging members between the pattern supporting mechanism and the false flask
being adjustable, substantially as described.
15. In a molding machine the combination with the flask and pattern supporting
mechanism and the false flask, of rods extending up from the flask and pattern
supporting mechanism adapted to engage and lift the false flask at the latter
end of the movement of the false flask and pattern supporting mechanism and
adjustable screws carried by the false flask with which the rods come in contact,
substantially as described.
16. In a molding machine the combination with two sets of pattern and flask
supporting mechanism of a stationary pressure plate located above the both
said sets, said pressure plate, provided longitudinally with openings whereby

page_text: two pressure plates are provided one above each set of pattern and flask supporting
mechanism, and removable plates to fill the said openings to provide a single
plate extending over both sets of pattern mechanism, substantially as described.
17. In a molding machine the combination with two sets of pattern and flask
supporting mechanism of a stationary pressure plate above the same and having
openings, sand delivery boxes located above said pressure plate and adapted to
drop down through the openings in the same to deliver the sand and another
opening in the pressure plate in line with and connecting the openings for the
sand delivery boxes whereby two pressure plates are provided one above each set
of pattern and flask supporting mechanism, substantially as described.
IS. In a molding machine the combination of the plunger and mechanism for
engaging it in its upper position, said plunger adapted to drop and enter the runner
box, one or more sprues; mechanism for engaging the latter in their upper posi-
tion and tripping mechanism connected with both the plunger and sprue engaging
mechanism, the engagement between said tripping mechanism and the plunger
engaging mechanism being slotted whereby a movement of the tripping
mechanism will first strip the sprues and then the plunger, substantially as
described.
19. In a molding machine, a sprue, mechanism for engaging it in its upper
position, said sprue adapted when released to drop down and a spring bearing on
said sprue when engaged in its upper position and adapted to start said sprue
quickly in its descent when released, substantially as described.
20. In a molding machine the combination with a pressure plate through which
the sprues movably pass of a vertically movable frame having a series of sprues;
mechanism
the frame
on
for engaging said sprue; mechanism for
releasing said engaging mechanism to allow the sprues to drop, said sprues carried
upward by the upward movement of the frame, substantially as described.
21. In a molding machine the combination with a vertically movable frame,
of a series of detachable sprues; mechanism on the frame for engaging each
sprue independently of the other and holding it in its upper position, adjustable
mechanism for releasing each sprue at the time desired and allow it to drop;
mechanism for moving the frame down to engage the sprues, said sprues carried
up by the upward movement of the frame, substantially as described.
22. In a molding machine the combination with a vertically movable frame of
a series of sprues carried thereby and a spring catch for each sprue carried by
the frame each of said catches having a series of engaging surfaces to engage
the sprue, substantially as described.
23. In a molding machine the combination with a pressure plate and a sand
reservoir above said pressure plate of a movable sand delivery. box or chute
independent of the reservoir but communicating therewith and mechanism for
holding said box or chute normally above the pressure plate, said box adapted to
drop down and deliver the sand below the pressure plate, substantially as described.
24. In a molding machine the combination with a pressure plate and a sand
reservoir above said pressure plate, of a movable sand delivery box or chute
independent of the reservoir but communicating therewith and mechanism for
holding said box or chute normally above the pressure plate, said box adapted
to drop down through the pressure plate and deliver the sand below the pressure
plate, substantially as described.
25. In a molding machine the combination with a pressure plate and a sand
reservoir, said pressure plate provided with an opening, of a sand delivery box
independent of the reservoir but communicating therewith and means for normally
holding it above the pressure plate, said box adapted to drop down through the
opening in the pressure plate and deliver the sand and a plate on the bottom of
the box adapted to fill said opening in the pressure plate when the box is carried
up to its normal position, substantially as described.
26. In a molding machine the combination with a vertically movable false
flask and a stationary sand reservoir of a movable delivery chute or box com-

page_text: municating with the reservoir and independent of the false flask and means
whereby it is held in its upper position by the false flask, substantially as
described.
27. In a molding machine, the combination with the pressure plate and a sand
reservoir above said pressure plate, of a movable sand delivery box or chute
independent of the reservoir but communicating therewith and mechanism for
holding said box or chute normally above the pressure plate, said box adapted
to drop down and deliver the sand below the pressure plate and said box provided
with an inclined bottom and an opening adjacent to the incline, substantially as
described.
28. In a molding machine a sand delivery. chute or box having its
bottom inclined in two directions one at an angle to the other and an opening
in each side of the box opposite the incline, substantially as described.
Dat his tha of Santalin 1800
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.