Year: 1887

page_text: Date of Application, 11th July, 1887
Specification Accepted, 23rd Aug., 1887.
I, GEORGE ADAMS, of Ansonia, Connecticut, one of the United States of America,
machinist, 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 :-
This invention is an upright mould, which revolves while receiving melted metal,
and afterward tilts to a horizontal position, to allow the convenient withdrawal of the
cast tubes therefrom. The apparatus is particularly applicable to the manufacture of
copper
and brass tubes, and it can be used in making tubes of other metals.
Figure 1 is a central vertical section of the apparatus, on a vertical diametric
line of Figure 2, and on horizontal diametric lines of Figures 3 and 4. Figure 2
is a plan view of the grooved ring 18. Figure 3 is a plan view of the diametrically
divided ring 35. Figure 4 is a plan view of a core-bit 33.
The numeral 1 indicates the main sill of the frame of the apparatus. The standard 2
is inade in two parts, and is adjustable in height, by means of the bolts 3 and the
slots 4. A corresponding standard, on the nearer but removed end of the sill 1, is
correspondingly adjustable. These two standards support the plate 5, and that plate
has a longitudinal track on its upper side, with a truck 6 on that track, for the
transportation of pots containing the melted metal to be used in casting. The
diagonal arın 7 is adjustably attached to the standard 2, by means of the bolts 8
and the slots 9, and is provided with a trunnion bearing in its upper end; and a
corresponding arm is correspondingly attached to the corresponding standard. The
standard 2 is provided with a bearing, covered with the bearing cap 10, for the shaft 11,
and the plate 5, sustains the hanger 12 and the shaft 13. The shaft 11 is turned
by the crank 14, and works the bevel gears 15, 16 and 17. The ring 18 is provided
with the annular groove 19, on its upper side, and the corresponding groove 20 on its
under side, and also with the trunnions 21 and 22; and those trunnions rest and turn
in the trunnion bearings in the two diagonal arms.
The mold 23, is supported by the ring 24, aided, in some positions, by the ring 25;
both of which rings are fixed about the middle circumference of the mould. The ring 24,
bas the annular groove 26 on its under side, and the ring 25 has the corresponding

page_text: groove 27 on its upper side. A series of anti-friction balls 28 and 29, rest in the
grooves 19 and 27, respectively, under the grooves 26 and 20, respectively. The
core 30 is made around the core barrel 31, in the usual manner; and is supported by
the under core-bit 32, and is held in its proper central position by the upper
core-bit 33. This latter bit is a ring, surrounding the core, and provided with three
thin radial arms, the outer diagonal ends of which rest on the annular diagonal
interior surface at the upper end of the mold 23, and the upper edges of which are
protected against the action of the melted metal by plumbago or other refractory sub-
stance. The bowl 34 is attached to the upper end of the mold 23, in a convenient position
to receive melted metal from pots on the truck 6. The divided ring 35, is fixed to
the small sill 36 of the frame, by means of the bolts 37. That half of the ring which
is on the right of the diameter of Figure 3, is detachable from the other part of the
ring, by simply lifting its fixed pins 39 and 40 out of corresponding pin holes in
that other half. The annular bevel gear 41 surrounds the upper circumference of
the mold 23, and meshes with the bevel gear 17, when the mold is in its upright
position.
The mode of operation is as follows: While the melted metal is being poured
into the mold, the mold is being revolved by the crank 14; and after the mold is
filled and the tube cooled, the removable half of the ring 35 is lifted away, and the
mold and its contents is tilted upon the trunnions 21 and 22, to a horizontal position,
and the tube is then conveniently removed by pulling it, with the core and upper
core-bit, out of the upper end of the mold.
The revolution of the mold while the melted metal is being poured into it, causes the
tube to be built up spirally around the core, and thus produces a freedom from blow-holes,
and an excellence and uniformity in the casting, which cannot be attained where the
mold is stationary, and the metal is therefore first deposited on one side of the core,
and reaches the other side by flowage alone. And that revolution also preserves the
bowl and the mold from being burned through by the stream of melted metal falling
or running constantly on one place in the interior thereof. The tilting of the mold
enables the cooled tube to be withdrawn horizontally therefrom, and thus lessens the
labor incident to the business.
Having now particularly described and ascertained the nature of my invention, and
in what manner the same is to be performed, I declare that what I claim is :
The combination of the mold 23, constructed to revolve substantially as described;
and the ring 18, surrounding the middle of the mold, and provided with the
trunnions 21 and 22, for tilting the same; substantially as set forth.
Dated this 18th day of June 1887.