IMPROVEMENTS IN MOULDING MACHINERY
Year: 1883

page_text: LETTERS PATENT to John Walker, of the City of. Cleveland in the State of
Ohio, one of the United States of America, Manufacturer for an Invention
of "IMPROVEMENTS IN MOULDING MACHINERY"
COMPLETE SPECIFICATION filed by the said John Walker at the Office of
the Commissioners of Patents on the 6th November 1883.
JOHN WALKER of the City of Cleveland in the State of Ohio, one of the United
States of America, Manufacturer. "IMPROVEMENTS IN MOULDING MACHINERY
"
The machine to which my improvements relate, consists briefly stated, as
follows: A suitable bed or foundation piece for the machine, situated in a pit in
the floor of the foundry, is provided with columnar bars projecting upward, which
sustain a hydrostatic cylinder. One of the columnar bars may be used as a pivot
around which the hydrostatic cylinder is moved to expose the portion of the
machine upon which the flask is to be placed. To sustain the cylinder during this
circular movement, and to prevent injurious strains being placed on the pivotal
column, the said cylinder is fitted with truck wheels which rest on a circular track.
The said cylinder is also provided with a system of pipes and valves whereby
water, oil, glycerine or other suitable liquid, under pressure, can be admitted to the
said cylinder to effect a vertical movement of a ram or piston contained therein.
To the lower end of the ram is attached a perforated platen which in the com-
pression of sand, (a part of the moulding), is forced in contact with the flask
containing the pattern. The flask is supported by a yielding plate which rests on
a series of small hydrostatic rams, and the pattern by a stationary plate which at
the beginning of the compressing operation, is below the surface of the yielding
flask-supporting plate aforesaid. The difference in height between these two
plates, regulates the degree of compression of sand, as in all cases, in the
downward movement of the flask, the said plates are brought to the same plane
and the sand which occupied the off-set space is driven into the flask. The pattern
of the rim of the pulley is separate from that of the arms and hub, and rests on
mechanism which will admit of its being withdrawn from the compressed mould
before the flask is elevated to its original position by means of the smaller rams,
JA

page_text: which become operative in this direction, as the pressure on the main ram and the
platen is removed. The cylinder with its ram and platen is now moved from over
the machine, the flask removed, and another ono substituted therefor; and the
operation as above briefly described repeated-The moulds produced from a given
pattern being exactly alike, and the flasks matched, any two of them may be
united with necessary cores to form a complete mould. In the further description
of my said invention, which follows, reference is made to the accompanying
drawings forming a part hereof, and in which :-Figure I. is a sectional elevation
of the machine. Figuro II. is a partly sectional elevation of the machine, as seen
from a different point, Figure 1II. is a plan Figures IV to XXXIV. inclusive
are views of details all of which excepting Figures IX, XXXIII and XXXIV, are
on an enlarged scale. Figures XXXV, XXXVI and XXXVII illustrate the
moulding of a car wheel instead of a pulley. Figures XXXVIII and XXXIX aro
details of parts of the machine showing certain modifications in its construction.
Similar letters of reference indicate similar parts in all the views. A. is the base
or foundation piece of the machine situated in a pit in the floor of the foundry.
A is a cylindrical case which is accurately bored and bolted to the upper surface
of the base A. The case A' projects upward to a point above the floor line, which
in Figures I and II of the drawings is indicated by z. z. A is an annular plate
upon which the flask A¹¹ is seated, and it has an inner peripheral downward pro-
jection a, which is turned so as to fit closely within the cylindrical case A'. The
plate A has also an exterior rim A which extends downward and conceals the
upper edge of the cylindrical case A¹, thereby forming a joint with a rim or floor
plate, a¹, which prevents the admission of sand to the pit in which the machino is
located, An enlarged view of a part of this plato is shown in Figure XXIV of the
drawing. The upper surface of the plate A" has holes which correspond with
others in the flask to be placed on the plate, and the said parts are united by
means of dowel pins of any suitable description. The devices for effecting a
vortical movement of the plate A¹¹ will be described hereinafter. B, is the central
stand of the machine situated within the case A¹ and resting upon the foundation A-
The stand sustains a removable ring B¹ which in turn supports the annular
plate B against which a part of the bed of sand in the flask A comes in contact,
as will hereafter appear-A pattern plate, all, is supported centrally of the machine
and within the removable annular plate B", by means of a column, a¹¹¹. This
pattern plate consists of a hub piece which is attached as hereinafter described, to
the column a, and one or more removable extension rings or annular addition
plates, which rest on a circumferential projection of the said hub piece, as shown
in Figures I. IX. and XXXVIII of the drawing-The pattern plate all may be
made in a single piece, if preferred. B is the rim pattern which extends upward
between the removable annular plate B, and the pattern plate a", and it is
secured to the flange b of a sleeve C, which has preferably a tapered adjustable
bush adapted to slide vertically on the column a", as hereinafter explained.
This flanged sleeve is shown in Figuros I. II. IV. V. VI. and in the last three
views on an enlarged scale-The rim pattern B1 is removable, as patterns of
various sizes have to be used, and it will be understood that a change in the
diameter of rim patterns will necessarily entail a change in size of the removable
aunular plate B₁ which surrounds it, and the annular removable extension pattern
plate a. C. is a hydrostatic cylinder supported by columnar bars C" and C¹¹I
which are properly secured to the foundation A. The columnar bar C is adapted
as a pivot around which the cylinder C¹ may be turned, and in order that this
movement of the cylinder may be accomplished easily, and without injury to any
part of the machine, an anti-friction bearing b', with conical rollers 6" is provided
on the columnar bar C, and the said cylinder with truck-wheels having
cylindrical anti friction rollors 6 which rest on a circular track c. The anti-
friction bearing with its conical rollers is shown on an enlarged scale in Figures VII
and VIII, and the truck wheels are represented in Figures I. II and III. One end
of the circular track c is sustained by the columbar bar C" which is provided for

page_text: the purpose with a clamp c¹, shown in Figures I. II and III; and at the centre or
the other end by a third columnar bar c", shown in Figures II and III. In some
cases it may be found necessary to provide additional supports for the track o; or
the track may extend to a wall of the building in which one end is secured, as
shown in Figure III. It will be understood that the object of the pivotal
movement of the cylinder C¹ is to admit of the placing of flasks in the machine,
and their removal after the moulding operation is completed. By reference to
Figure III. it will be seen that the cylinder C with an attachment thereof, herein-
after described, is represented by dotted lines in a removed position. By reference
to Figure III. it will also be seen that the part of the cylinder sustained by the
columnar bar C is hooked to admit of the pivotal motion of cylinder before
described. The pattern plate a" is fitted over a central projection of the
column all, herein before alluded to; and to increase the support, the said column
is provided with a flange, d, carrying a dowel pin, d', which enters a hole in the
said plate. The flange d is secured to the column by means of a bolt c¹¹ D, is
the platen, or device which is brought into contact with the upper edge of the
flask A, and the upper surface of the sand in same, in the compressing operation;
and it is secured to the lower end of the ram D', which is adapted to slide in the
cylinder C. A ball or spherical joint is formed at the junction of the ram and
platen, in order that the latter device may adjust itself to any deviation from a
horizontal plane of the upper edge of the flask. The ram D¹ is packed at its
lower end by means of a gland, du, and a packing cup, ", of leather or other
suitable material, and at its upper end by means of a plate, e. a follower, e', and the
leather cups ell.
The rain D is made somewhat smaller in diameter, than the interior of the
cylinder C, as will be seen by reference to Figure J. By this means an annular
space is formed around the ram. which is utilized in the elevation of the ram and
platen, as will be hereinafter explained. The mechanism whereby water, oil,
glycerine or other liquid body is conducted to and from the cylinder C¹, above the
ram and to and from the annular space around the ram; and otherwise controlled
so as to effect the proper movement of the various parts of the machine in tho
compressing or ramming operation, consists as follows: A main feed-pipe D"
connects the pump and accumulator, not shown in the drawing, with the upper
end of the pivotal columnar bar C which has channels, e, therein, and a
secondary feed-pipe, D¹¹¹, connects the said channels with the upper end of the
cylinder C in such manner as to admit of the movement of said cylinder and its
connections from over the machine, as before referred to; in other words, a packed
pivotal joint is effected where the secondary feed-pipe D' communicates with the
channels, and the main feed pipe D", as shown on an enlarged scale in
Figures XXII and XXIII.
E, is the upper valve case located in the secondary feed-pipe D¹¹¹ containing a
piston valve E', the movement of which by means of a handle, hereinafter
described, causes the liquid under pressure to pass to and from the cylinder C¹-
Water, oil or other liquid is conducted to the annular space around the ram D¹,
before referred to, and which is designated by Ell, by means of a branch feed-
pipe, E, extending from a second valve case F corresponding very nearly in
construction to the one E, and which is provided with a piston valve F attached
to, or forming a part of, the one E' in the case E-In the further consideration of
the feed-pipes and their attachments, which follows, reference should be made to
Figures XXII. XXIII. XXIX. XXX. XXXI and XXXII of the drawing, which
represents the said parts on an enlarged scale. Figures XXII and XXIII show
the head of the columnar bar C, together with parts of the main and secondary
feed-pipes D and D, the former extending toward the pressure accumulator, and
the latter in the direction of the hydrostatic cylinder. Figure XXIX is a sectional
viow of the valve cases and their attachments. Figure XXX a sectional view of
a part of the same, as seen from a different point, and Figures XXXI and XXXII
exterior views of the same, the last named being a plan-The valve cases E and F,

page_text: aro each fitted with a cap, f, which is perforated to prevent compression of air
between the piston valve, and the cap, as the piston is moved towards it. The
plunger valves E and F, which are properly packed at the inner ends of the
valve cases, are connected by a stem, fi, which is centrally slotted and provided
with a pin, f, to which the end of a hand lever, f, is attached, The hand
lever is pivoted to a frame, g, projecting from the valve cases E and F, and it has
a spring handle whereby it may be locked in any one of three positions indicated
by dotted lines in Figure XXIX, and numbered 1, 2 and 3. The upper valvo
case E, has feed nozzles, g¹, and, gl, to which the two sections of the feed-pipe D¹¹I
are connected, and the nozzle g¹ is connected to the lower valve case F, by means
of a pipe, g. The lower valve case is also fitted with a nozzle, h, to which the
pipe E, leading to the annular space E¹¹ around the hydrostatic ram, is attached.
The pipes D, g, and E, instead of communicating directly with the interior
of the valve cases, terminato in annular grooves, h², corresponding in width to the
diameter of the pipes, in order that the plunger valves may be balanced by an
equilibrium of pressure, The plunger valve E¹ has a slot, h", which when brought
in connection with the annular grooves h¹, establishes connection between the two
sections of the supplemental feed pipe D", and admits liquid under pressure to
the hydrostatic cylinder C¹, and above the ram D' therein. The plunger valve F¹
has also a slot, i, similar to the one, ¹, in the valve E, adapted to connect the
pipe g with the pipe E" leading to the annular space. around the hydrostatic
ram. The distance between the slots and i is such, that water cannot be
admitted to both the hydrostatic cylinder C³, and the annular space E", at the
same time. By reference to Figures XXIX and XXX, it will be seen that the
plunger valves E and F are hollow, and the central apertures which are denoted,
respectively, by and i, have branches, which in the valve El are designated by
and k, and in the one F¹, by k¹¹ and k¹¹¹. The various lateral openings in thio
valves bear such relation to each other, and to the annular grooves and the
discharge apertures l, l', that when the water is being admitted to the cylinder
through the slot ", the discharge from the annular space around the ram is open,
and vice versa. Both discharge apertures, and A, communicate with a common
outlet pipe, , shown in Figures XXXI and XXXII. When the hand lover f
'is in the first position, shown in Figure XXIX; water from the accumulator passes
to the cylinder C¹, and the contents of the annular space around the ram are
discharged. By moving the hand lever to the second, or neutral position, all
movement of the water ceases; and by placing the hand lever in the third
position, water is discharged from the cylinder, and admitted to the annular space
around the ram. The plato A" upon which the flask A rests, is elevated by
means of four pistons or plungers F", adapted to slide in cylinders F", which
under certain circumstances are supplied with water under pressure. These
cylinders are united by supply pipes G, connected to the valve chamber G'.
The piston F", the cylinder F, and a part of the pipe G, are shown on
an enlarged scale in Figure XXIV, and a part of the last named, in
Figure XXV, and the valve chamber G' with some of its connections, in
Figures XXVI, XXVII and XXVIII. Referring specially to Figures XXVI,
XXVII and XXVIII, it will be seen that the pipes G connect with annular
grooves, m, in the inner surface of the cylinder, which admit liquid to the entire
circumference of the piston or plunger valve G", and balances it in a similar
manner to the valves E¹ and F¹ in the chambers E and F. This valve, G¹¹, has a
slot, m', whereby the two sections of the pipe G connected to the case G³, may be
placed in communication, to admit water from the accumulator to the small ram
chambers; and a central aperture, m¹¹, having lateral openings, m, whereby
water may be discharged from under the small rams to the discharge pipe n.
The plunger valve G₁ extends upward through a guide shell, G, and is attached
to a lever, H, pivoted to a part of the guide shell-The lover H is formed into a
handle at its outer end, and it has a thumb bolt, whereby it may be secured to a
graduated stand, H, bolted to the annular rim a¹¹¹, of the plate A". A collar,. n³,
1111

page_text: on the portion of the plunger valve G within the guide shell G, (see
Figure XXVI) is to prevent the plunger valve G being lifted higher than is
necessary to give a full passage for water from the small rams. The devices to
elevate and depress the rim-pattern B, which is secured to the flange b, of the
sleeve C, are represented in Figures I, II, III, IV, V, VI, X, XI, XII, XIII, XIV,
XV, and XVI, and consist as follows; A screw, n", with its upper end resting
in a bearing, n, in the column, all, and its lower end on a step, o, is provided
with a threaded nut, o¹, confined between two blocks, ol, fastened in the sleeve C,
by means of screws olll-The screw n¹¹ is rotated by means of the mitre gears, p,
from a horizontal shaft, pl, susceptible of revolution through the agency of mitre
gears, p, threaded spindle, pl, bevelled gears, q, q', counter shaft, q", and hand
wheel, q. By means of the hand wheel, ql, a rapid movement of the rim-
pattern may be effected, and small rim-patterns withdrawn from the sand, but
where larger pulleys with wide faces are to be moulded, the hand wheel H" is
used. This hand wheel is secured to a short vertical shaft, r, which passes through
an eccentric sleeve, r², confined in a bracket ", which projects from the column 7111
supporting the spindle 2. The short vertical shaft, carries a pinion, a, which
by the circumferential movement of the eccentric sleeve, r¹, by means of a spring
handle, s', is thrown either in or out of gear with the spur wheel 8". The circular
upper end of the bracket 711, has two holes in its outer surface, into either of
which, the inner end of the spring handle a¹ will pass.
When the handle is in one
hole, the pinion 8, is in gear with the spur wheel s", and when in the other, the
two gears are separated, the eccentricity of the sleeve being sufficient to produce
that result. It will be understood, that when the hand wheel q¹ll is employed, tho
gears 8 and must be separated. An index nut, 81, on the threaded part of the
vertical spindle, p", is used to indicate the position of the rim-pattern, and in
order to obtain a common movement of the index nut and the rim-pattern, the
two threads are preferably made with the same pitch. The index nut extends to
the outer surface of the coluinn 7, through a slot therein, and the said column is
fitted with an adjustable stop, t, so that after the withdrawal of the rim-pattern,
it can be accurately replaced for a subsequent moulding operation. To facilitate
the adjustment of the rim-pattern, the sleeve C is counter-balanced by means of a
weight, H, suspended from the outer end of a bifurcated lever t', which is con-
nected to the sleeve C by means of links t". Parts of the invention, not yet
alluded to, will be described and their uses fully set forth, in the description of
the operation of moulding, by means of the machine, which follows-Supposing
a number of pulleys of the same size. are to be moulded, the first step is to elevato
the platen and ram to the desired height, by admitting water under pressure to
the annular space around the ram, which operation is accomplished by moving
the handle f, to position 3, Figure XXIX; the handle may then be changed
to the neutral position, number 2, when further elevation of the ram and piston is
prevented. The hydrostatic cylinder with the elevated ram and platen, is then
moved from over the machine, or to the place indicated by its dotted delineation
Figure IlI. The pattern of the hub and arms, and the rim-pattern are then
selected and placed in position, the rim-pattern with its upper edge projecting
above the pattern plate to a distance equal to one half the face of the pulley
to be made-The next step is to place the flasks in position, and arrange the
degree of compression to which the mould is to be subjected. It will be under-
stood that the degree of compression is regulated entirely by the height of the
flask-supporting plato A", above the pattern plate B", at the beginning of the
compressing operation. In other words, the compression of mould is effected by
adding to the filled flask, the body of sand resting on the pattern, and below the
flask, at the commencement of the moulding operation. The vertical position of
the flask-supporting plate A" is effected by the height of the small rams that
sustain it, and by reference to Figures XXIV, XXVI, XXVII and XXVIII it will
be seen that the upward projection of the rams, when the same are under pressure,
is governed by the relativo positions of the slot in the plunger valvo G, and the

page_text: annular grooves in the valve case or cylinder G¹ in communication with the pipes
leading to and from the small ram cylinders. Now, as the vertical adjustment of
the said plunger valve is received from the plate A" through the medium of the
telescopic lever H, (see Figure XXVI) it must be evident, that when in the
elevation of the said plate, the lower end of the slot m¹ passes abovo the upper
edge of the lower annular groove m, the flow of water underneath the small rams
is suspended, and all motion stopped. But as the movement of the plunger
valve G is governed by that of the plate A", it is obvious, that any change in
the relative positions of the handle H, and the plate A", must alter the height at
which the plunger valve G11 rises, before all movement of water to small rams
ceases. Now it is to admit of this change, and to show at a glance, the height to
which the plate A" may be moved, that the graduated stand H₁, before briefly
alluded to, is coupled with the handle H, and adjustably connected to it-The
degree of compression being determined on, and the handle H set, no further
attention to this detail of the operation is necessary, as no matter what position
the plate A is made to assume by direct application of force thereto, the said
plate, when released from such force, is automatically brought again to the pre-
arranged location. The space below the flask, and the flask, are next filled with
sand, the platen moved over the flask, and the handle changed to position
number 1, (Figure XXIX) when the annular space E around tho. ram D¹ is
discharged of its contents, and water under pressure from the accumulator,
admitted to above the ram. The platen is thus brought in contact with the
flask, and the flask and plate A" forced down, until the latter reaches the top
of the cylindrical case A¹, and the lower face of the flask is brought on the same
plane as the upper face of the pattern plate. During this operation all the sand,
originally below the flask, is driven into the same, and the rim pattern, and
pattern of the hub and arms of the pulley, forced wholly within the compressed
sand, and the mould completed to the step, where it is necessary to withdraw the
patterns. It will be understood that in the downward motion of the flask-
supporting plate A", the water contained in the small ram chambers F111, below
the rams F, is forced back towards its source of supply, the accumulator, the
transverse area of the ram D¹ being much greater than that of the four small
rams combined. The next step is to draw the rim-pattern, and this operation is
performed through the agency of the hand wheel H and the mechanism before
described connecting it with the sleeve C, on the flange b of which, the rim-pattern
is seated.
'111
The handle fl is next moved to its original position, viz; that
indicated by the dotted line, number 3, Figure XXIX, which effects the dischargo
of water from the head of the ram D', and causes the pressure to be applied to the
annular space El around the same. As the platen is raised from the flask, the said
flask is again elevated with the plato A", the latter being moved by the small
rams E, which as before stated, automatically assume their original positions,
when released from the preponderating pressure of the ram D'. The mould is
thus elevated from the pattern of the arms, and the hub of the pulley. After the
hydrostatic cylinder with its ram and platen is again carried from over the flask,
tho latter is removed from its position on the flask-supporting plate A", and
another flask placed in position. The moulding operation, as described, is then
repeated. It will be understood that in nearly all moulding operations, the
compressed sand in the flask has to be vented, as the sand is too compact to allow
of the escape of air, gases and moisture, without channels being formed. This
venting is generally performed by means of a wire. To allow of the escape of air
from the sand during its compression, the platen D, and the sides of the
flask A are perforated, and I insert in the sand before its_compression,
the perforated pipes and dishes 1, shown in the mould in Figure I, and on an
enlarged scale in Figures XVII, XVIII, XIX, XX and XXI. Theso perforated
devices will be changed in size, shape and other characteristics, to suit the different
patterns, I therefore, do not confine myself to the designs shown. The long conical
pipes are intended to be placed between the partitions, K in the flask, while the

page_text: shallow dish is placed over the hub of the pattern, as shown in Figure I; and they
are preferably removed from the sand after the moulding operation is completed,
and used in the next flask. From the foregoing description, it will be understood,
that after the machine is properly adjusted, the only parts thereof to be operated
by the person in charge, to complete a mould, is the handle f, which governs the
How of the compressing liquid to and from the hydrostatic cylinder above the
ram, and the annular space around same, the hand wheel H" whereby the rim-
pattern is withdrawn, and the hydrostatic cylinder, and its attachments, in the
movement necessary to admit of the removal of the completed mould.
A guage, L, on the upper end of the bydrostatic cylinder, indicates at all times
the pressure per square inch to which the mam is subjected. Figures IX and
XXXVIII, illustrate two methods of reducing the internal diameter of the plate A"
by inserting therein supplemental rings, M, to support the flask. As the rings M
have to be of a considerable depth, in order to allow of the vertical adjustment of
the plate A", I make them of box form, or hollow, and the first one rests on a lip
on the inner peripheral downward projection, a, of the plate A"; and when a
series are used each inner ring rests on a lip on the adjoining outer one, as will be
seen by reference to Figure XXXVIII. In all cases, it is desirable to have the
internal diameter of the plate A", or the operative supplemental ring M, slightly
less than that of the flask for which it is adapted, in order that the compressing
sand may enter freely. Figure XXXIII, is a top view of the yielding plate A",
the annular plate B, and pattern plates, with the pattern of the hub and arms of
pulley; and Figure XXXIV, is a cross section of one of the arms of the pattern,
and a part of the pattern plate.
Figure XXXV is a sectional view of a completed mould for a car wheel, showing
the cores and chill. Figures XXXVI and XXXVII, illustrate the manner of
moulding a car wheel by means of my invention, and show that in this description
of work, the pattern may rest directly on the central stand B, the ring B' being
removed, an operation that will be readily understood by those practically con-
versant with iron founding. Figures XXXVIII and XXXIX, are views, the former
in section, of the upper portion of the machine showing the truck wheels which
support the hydrostatic cylinder, when moved from over the centre of the machine,
rosting on a rail, about on a line with the floor plate a¹, the said truck wheels
being secured to a bracket extending from the underside of the said cylinder.
They also show a series of supplemental rings, M, placed within the plate A¹¹ to
reduce its internal diameter to suit small pulleys. The upper surface of the rim or
floor plate a¹, is preferably corrugated, or otherwise roughened, as shown in
Figure III. I do not limit myself to any particular kind of pump or apparatus
for accumulating or storing the liquid under pressure, but it is designed to have a
tank to supply the pump, and all liquid discharged from the various cylinders,
should, for the sake of economy, return to the tank to be again used. While the
machine has been described as one for moulding pulleys, I do not confine myself to
this class of work, as car wheels, reaper wheels, and gearing from a pattern, can be
readily moulded; nor do I limit the machine to circular work, as shaft hangers,
and in fact, all kinds of work, can be moulded, equally as well as pulleys. In
machines for general moulding, several of the parts thereof, which in the present
machine, aro circular in form, may be rectangular, or of some other shape.
I claim as my Invention:
First. In a moulding machine, a stationary or fixed pattern plate combined with
an exterior flask supporting plate sustained by means of hydrostatic rams, and
means for operating the said rams, whereby the height of the flask supporting plate
may be adjusted with reference to that of the pattern plate, substantially as, and
for the purpose, specified.
Second. In a moulding machine, a fixed or stationary pattern plate, a flask
placed over the said pattern plate and seated on a yielding supporting plate which
surrounds the said pattern plate, and a compressing device located above the said
flask and adapted to be forced in contact with its upper surface; and thereby

page_text: lower the said пask, and its support, in the compressing operation, substantially as
specified.
Third. In a moulding machine, a yieldingly supported flask, a compressing device
located over and above the said flask, and mechanism operating the said compressing
device, to force the flask in a downward direction, in the moulding operation,
substantially as specified.
Fourth. In a moulding machine, the combination of a yieldingly supported flask,
a hydrostatic compressing device situated over and above the said flask, and
mechanism operating the said bydrostatic compressing device, whereby a portion
thereof is made to bear upon the said flask in the compressing operation, and to be
retracted after the said oporation is completed, substantially as specified.
Fifth. In a moulding machine, the combination of a plate for holding a pattern,
an exterior flask supporting plate sustained by independent resilient yielding
devices, a flask, and retractible means for forcing the said flask and its support
towards the pattern holding plate, substantially as specified.
Sixth. In a moulding machine, a supporting plate for the flask sustained by
yielding resilient devices, combined with a compression platen, and means for
reciprocating the platen substantially as, and for the purpose, specified.
Seventh. In a moulding machine, a stationary or fixed plate for sustaining the
pattern of the arms and hub of a pulley or wheel, a fixed plate for sustaining the
Band exterior of the said pattern, the said plates being separated by an annular
slot, combined with a rim pattern adapted to pass through the said annular slot,
a flask, a support for the said flask, and resilient sustaining devices for the said
flask support, substantially as and for the purpose, specified.
Eighth. In a moulding machine, a foundation or base piece, a caso seated on the
base piece, a flask supporting plate guided by the said case, a fixed central column
to sustain a pattern plato, resilient yielding supports for the said flask supporting
plate, a flask, and a compressing platen to force against the flask and its supports,
substantially as specified.
Ninth. In a moulding machine, compressing devices which consist of a hydrostatic
cylinder, a ram adapted to slide within the said cylinder, and a platen attached to
the said rum, combined with a flask, and a flask support with resilient compressible
sustaining devices, substantially as specified.
Tenth. In a moulding machine, a hydrostatic cylinder having therein a
reciprocating ram, and a platen secured to the said ram, the whole being pivoted to
the frame of the said machine and its travelling end supported by means of truck
wheels and a track, substantially as specified.
Eleventh, In a moulding machine, a yieldingly supported flask, combined with
a compressing platen, adapted to rest on the face of the said flask, the said platon
having perforations therein, to allow of the escape of air from the sand in the
compressing operation, substantially as specified.
Twelfth. The pattern plate all supported by a column having a flange extending
beyond the same, the said extension or flange: exterior of the said column, having
means to effect the proper and regular relative positions of the said flaugo and
plate, substantially as specified.
Thirteenth. As means for effecting the automatic reciprocation of the flask
supporting plate A", the combination of the series of small pistons F", and pipes
leading to the cylinders F, of the said pistons, the valve case G', and plunger
valve Ğ", the said valve being connected to the said plate A" by means of the
lever Hand the graduated stand H, substantially as specified.
Four-teenth. In combination with a flask and a compressing platen, one or more
removable perforated pipes or dishes, to facilitate the escape of air from the sand, in
the compressing operation, substantially as specified.
Fifteenth. As means for effecting a change of speed in the movement of the
rim-pattern, the combination of the vertically movable sleeve C, with the shaft p!!!
and mechanism connecting the same to the said sleeve, the gears q and q¹ and s
and 8", and band wheels H" and g, the spindle of the pinion s being confined in.

page_text: an eccentric sleeve, whereby the said pinion can be thrown in or out of gear with
the spur wheel &', substantially as specified.
Sixteenth. As means for ascertaining and registering the vertical position of the
rim pattern, the combination of the sleeve C with the threaded spindles p
and ", connected by means of gears to the intermediate shaft p', the spindle n
having a not united by suitable devices to the said sleeve, and the spindle pl
being provided with a nut, and an indicating device, substantially as specified.
Seventeenth. The plate A" having the peripheral downward projection all,
combined with the rim or floor plate a', whereby sand from the floor of the
foundry is prevented from entering the pit, substantially as specified.
Eighteenth. In combination with a vertically adjustable annular finsk supporting
plate, having an inner peripheral downward projection, whereby it is guided in its
vertical movement, a series of hollow or box shaped addition rings, adapted to bo
secured therein, substantially as, and for the purpose, specified.
In testimony whereof, I have hereunto set my hand and affixed my seal, this
Thirteenth day of August, in the year of our Lord One thousand eight hundred
and eighty threo,