and moulds 10 Enting same.
Year: 1887

page_text: Date of Application, 1st Mar., 1887
Complete Left, 1st Dec., 1887
Complete Accepted, 6th Jan., 1888
and moulds 10 Enting same.
I, ALFRED AUSTIN RICKABY, of Bloomfield Engine Works, Sunderland, in the
County of Durham, Engineer, do hereby declare the nature of this invention to be
as follows:-
According to my invention the rings forming metallic packing for piston and other
rods are cast of any required section so that they leave the mould ready for use without
turning or boring requiring only cutting in halves, when cast entire, or dressing fair
at joints when cast in halves.
The mould in either case is made of cast iron, steel or other suitable metal known as
શ "chill mould and is accurately bored out to the exact outside and inside diameters
of the intended rings and of the required sections.
In casting entire rings, to be afterwards cut, the mould is made in two parts each
part forming one half of a ring a "gate" being provided to receive the metal and
proper "vent" for the air and to ensure the metal running up to the outer edge of
rings thus <((a) being the outer circumference) the parts of the mould have a thin
space between them.
In casting half rings only half a mould is used which forms rather more than half
the circle of the intended rings and several rings of the same or of different sections
may be cast at once. When cast the portion of the ring beyond the half circle is cut
off removing dross if any and making a clean surface.
In both modes of casting the internal diameter of the rings is formed by a turned
core-spindle" and this spindle has on it an enlarged part in which are turned out
grooves necessary to cast the rings or half rings of reverse angle thus >*-(a) being
the inner circumference.
1
1
1
L 1007

page_text: A New or Improved Process of Casting Rings of Metallic Packing
and Moulds for Effecting same.
I, ALFRED AUSTIN RICKABY, of Bloomfield Engine Works, Sunderland, in the
County of Durham, 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 :-
According to my invention the rings, forming metallic packing for piston and other
rods, are cast of any required section so that they leave the mould ready for use,
without turning or boring, requiring only cutting in halves, when cast entire, or
dressing fair at joints when cast in halves."
The mould in either case is made of cast iron, steel or other suitable metal known
as a chill-mould" and is accurately bored out to the exact outside and inside
diameters of the intended rings and of the required sections.
22
In casting entire rings, to be afterwards cut, the mould is made in two parts each
part forming one half of a ring a gate being provided to receive the metal and
"vent for the air and, to ensure the metal running up to the outer edges of
rings, the parts of the mould have a thin space between them.
proper
In casting half rings, only half a mould used which forms rather more than half
the circle of the intended rings and several rings of the same, or of different sections
may be east at once. When cast the portion of the ring beyond the half circle is cut
off removing "dross," if any, and making a clean surface.
In both modes of casting the internal diameter of the rings is formed by a turned
core-spindle and this spindle has on it an enlonged part in which are turned out
grooves necessary to cast the half rings of reverse angles, or these reverse angle rings
may be cast entire by using moulds in halves the division being at the centre of
thickness of each ring.
DESCRIPTION OF DRAWINGS.
On the accompanying sheet of drawings I have illustrated my invention as
On the accompanying sheet of drawings I have illustrated my invention as
applied to casting rings, in halves and entire, the former method being that which I
have adopted in practice. The rings are shewn of the ordinary pyramid section, but
other sections may be cast by the same process.
Fig. 1 shews a plan and Fig. 2 a sectional end elevation of a mould, half the real
size, for casting rings, for a piston or other rod, 4 ins. diar., each ring being cast in
halves which is the method I prefer as being the simplest in practice.
Fig. 3 shews a plan and Fig. 4 a sectional end elevation of a mould in halves to
cast the rings next the rod entire, to be afterwards cut, and Fig. 5 is a section of a
mould for casting the reverse angle rings entire, to be afterwards cut.
On Fig. 1 and 2 A is the half mould, bored out to the diameter of the rod for which

page_text: the packing rings are to be cast, represented by the smaller diameter of the turned
spindle B. The grooves CC of the section of the inner packing rings are turned out
of the inside of mould and the grooves D. D. of the section of the outer or reverse
packing rings, are turned, out of the enlarged diameter of the spindle B. The end
rings, next bottom of stuffing box, and gland, are cast in the groove E between the
shoulder of spindle B and the collar next it in mould.
The metal is poured from a small ladle into each groove flowing a little above the
centre line of the half diameter the excess receiving any "dross" and when cool the
spindle B is lifted out and the rings require only the excess over the half diameter cut
off to be ready for use with a perfectly true shape, and smooth surface. On Figs. 3
and 4 (shewn to one fourth actual size) A is the mould consisting of an upper and
lower half, clamped together by the flanges where they join. B is the turned spindle,
CC are the grooves turned out of the inside of mould of the sections of the packing
rings. Next rod, E is the groove to form the rings next bottom of stuffing box and
gland.
F is the main gate in top of mould into which the metal is poured and G
branch "gates into the grooves and H is the air vent. The two halves of the mould
are slightly open at centre to insure the metal filling the corners of the grooves.
<
32
On Fig. A is the mould for casting the outer or reverse rings formed like a ring
divided through its thickness and its inner diameter that of the piston or other rod.
Each half of this mould has a groove turned in it of half the section of the packing
ring forming the full groove C. B is the turned spindle. The metal is poured into
the groove by a gate at any convenient point an air vent" being formed all
round by the thin opening between the halves of the mould which also insures tho
metal running into the sharp corners of the rings. When cool the mould is separated
and the ring, being cut, is ready for use. More than one ring may be cast at once
by having two or more moulds on one spindle or rings of different diameters may be
cast on a stepped spindle indicated by dotted lines.
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
Casting metallic packing rings, either entire or in halves, in “chill” moulds round
a spindle forming the core so that, when cast, they are ready for use without boring
or turning, substantially as described and shewn.
Dated the 29th day of November 1887.