IMPROVEMENTS IN MACHINERY OR APPARATUS FOR THE MANUFACTURE OF WELDLESS CORRUGATED TUBES
Year: 1882

page_text: LETTERS PATENT to Samson Fox, of the Leeds Forge, New Wortley, Leeds,
in the County of York, Engineer and Ironmaster, and Joseph Whitley, of
the Railway Works, Leeds, in the said County, Engineer and Founder, for
PROVISIONAL SPECIFICATION left by the said Samson Fox and Joseph
Whitley at the Office of the Commissioners of Patents on the 16th January
1882.
'
SAMSON Fox, of the Leeds Forge, New Wortley, Leeds, in the County of York,
Engineer and Ironmaster, and JOSEPH WHITLEY, of the Railway Works, Leeds,
in the said County, Engineer and Founder. "IMPROVEMENTS IN MACHINERY OR
APPARATUS FOR THE MANUFACTURE OF WELDLESS CORRUGATED TUBES."
Our Invention relates to the manufacture of weldless corrugated tubes, to be
used in the construction of steam boilers, our object being to produce such articles
at less cost than heretofore.
In order to accomplish this we construct a suitable mould or chill having an
outer shell and an inner core mould in two or more parts, the said mould or chill
being so formed as to leave an annular space between the outer and inner parts, of
a corrugated form, and which represents. the tube proposed to be produced by
the pouring of molten metal into the said mould or chill.
This mould or chill we construct so that the outer and inner parts are concentric
with each other, and so that it may easily be taken apart for the ready removal
from a tube produced therein, and immediately after crystallization has taken place
and while it still retains that degree of heat necessary for the purpose of being
rolled in a suitable mill, to the diameter and thickness of metal to which it is.
required to be finished.
These corrugated tubes may be cast whilst the mould or chill is stationary and
with the axis in a vertical position but in some cases in order to ensure an equal
distribution of the metal whilst being poured into the mould or chill, and for the
purpose of increasing the density of the metal of which the tubes are composed we
rotate the said mould or chill during the process of casting for which purpose we
fix the said mould or chill in a concentric position upon a revolving table or face
plate, the whole being suitably mounted and driven.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Samson Fox and Joseph Whitley in the Great Seal Patent Office
on the 14th July 1882.
SAMSON Fox, of the Leeds Forge, New Wortley, Leeds, in the County of York,
Engineer and Ironmaster, and JOSEPH WHITLEY, of the Railway Works, Leeds
in the said County, Engineer and Founder. IMPROVEMENTS IN MACHINERY OR
APPARATUS FOR THE MANUFACTURE OF WELDLESS CORRUGATED TUBES.
Our Invention relates to the manufacture of weldless corrugated tubes to be used
in the construction of steam boilers, our object being to produce such articles at
less cost than heretofore usual. We construct a suitable mould or chill having an
outer shell and an inner core mould, in two or more parts, the said mould or chill
being so formed as to leave an annular space between the outer and inner parts of
a corrugated form, and which represents the tube proposed to be produced by the
pouring of molten metal into the said mould or chill. This mould or chill we
construct so that the outer and inner parts are concentric with each other, and so
that it may easily be taken apart for ready removal from a tube produced therein
and immediately after crystallization has taken place and while the metal of the
tube still retains that degree of heat necessary for the purpose of being rolled in a
suitable mill to the diameter and thickness to which it is required to be finished.
These corrugated tubes may be cast whilst the mould or chill is stationary and
with the axis in a vertical position, but in order to ensure an equal distribution of
the metal whilst being poured into the mould or chill, and for the purpose of
increasing the density of the metal composing the tubes, we rotate the said mould
or chill during the process of casting, for which purpose we fix the said mould or
chill in a concentric position upon a revolving table or face plate, the whole being
suitably mounted and driven. In the accompanying Drawings, Fig. 1. is a
sectional elevation of a vertical mill, mould or chill, such as previously referred to,
for casting corrugated boiler tubes or flues.-Fig. 2, is a general elevation, Fig. 3.
is a cross section shewing the external portion of the mould or chill (called the
Cope") in the line S. S,--and the internal part or "core," in the line T, T,—
Fig. 4, is a plan shewing the upper part of the framework with adjustable bearings
for steadying the mould or chill during its rotating motion and the casting
operation, the said bearings being actuated by springs, levers or screws, or other
equivalent mechanism. A, is the base plate upon which is mounted a driving
shaft B, which may be the shaft of a steam engine or other motor, or may have
motion imparted to it in any other convenient manner, C, is a gear wheel taking
into and driving the pinion D, on the vertical axis D 2. of the revolving table, face
or base plate D 1. upon which the beforementioned mould or chill is mounted.
E, E, are pillars carrying the upper part of the framework F,-G, G, are the
adjustable sliding bearings for steadying the mould or chill during its revolving
motion, H, H, represent the outer portion of the mould or chill called the " Cope,"
which we make by preference in three parts, the joints of which are radial to the
axis of the mould.-The outside of the "Cope" is very slightly conical and
provided with rings or hoops I, J, K, L, fitted thereon, and which when driven on
tend to force and hold the parts together. The hoop L, forms the upper journal
revolving in the beforementioned sliding bearings G, G,-M, is a "runner" or
gate" attached to the top of the mould, internally it is of pear shape or
approximately so, its joints are radial and are arranged between those of the
outer part of the mould or chill, so as to "break-joint" therewith, N, and O,
form the internal part or "core" of the mould or chill.-We have shewn it as
"

page_text: being composed of six parts, the parts N, being the "major" parts, and the parts O,
the "minor" or releasing parts, and the joints of these latter converging to a point
some distance outside the mould or chill, as P.
"
"
"
"
"
Although, we prefer to make this "core" of six parts, yet it may be composed of
less or more. The whole of these parts are held in proper concentric position
(during the process of casting) at their lower ends by taking into a circular recess
or groove formed around a hub or boss on the revolving table or base plate D1,
this hub or boss being made slightly conical, and at their upper ends by taking
into a circular groove on the underside of the headpiece Q, the whole being
secured in place by the central bolt R, screwed into the above mentioned hub or
boss The head piece Q, is centrally within the "runner or "gate" M, and thus
constitutes a "dam' or portion of the "runner ог "gate
for the better
conducting of the molten metal into the mould or chill,-When the mould or chill
is intended to be a stationary one we provide a separate base plate with its upper
surface of similar configuration to that of the table or base plate D1.-After
casting and as soon as crystallization or "set" of the molten metal has taken place,
the revolving motion of the mould or chill is arrested, the central bolt R, unscrewed,
and the head-piece Q, removed. The contraction of the casting causes the core to
collapse, which is facilitated by the form of the sides of the minor parts O, and the
conical form of the hub or boss of the revolving table or base plate D1, which
permits of the falling back of the parts O,-The whole "core" as well as the outer
sections forming the "Cope" may now be removed, leaving the casting standing
upon the table or base plate D 1, on the removal of which, the re-assembling of the
component parts of the mould or chill may take place ready for another cast.-
Such a vertical mould or mill may receive the metal at its lower end if special
provision be made for that purpose, by applying pressure to the metal, but for
convenience we prefer to pour in at the upper end.
"
Having now described the nature of our said Invention and the manner of
carrying the same into practical effect, we would have it understood that what we
consider to be novel and original and therefore claim as secured to us by the
Letters Patent, hereinbefore first in part recited is
1. In an apparatus for moulding or casting weldless corrugated tubes, the
combination of an outer shell or chill in two or more parts and an inner part or
core mould in three or more parts, the construction and arrangement being such as
to permit of the collapse and withdrawal of the inner part or core mould.
substantially as described.
2. In an apparatus for moulding or casting weldless corrugated tubes wherein
an outer shell or chill in two or more parts is combined with an inner part or core
mould in parts as referred to in Claim 1. the method of securing the said parts in
their relative positions by means of a grooved base plate and grooved headpiece
substantially as described with reference to Fig. 1. of the Drawings.
3. In an apparatus for moulding or casting weldless corrugated tubes wherein
the outer shell or chill is made in two or more parts, forming the said parts in
such wise that when arranged in position they constitute the fustum of a cone
and securing the same together by internally coned rings substantially as
described.
"
4. In a moulding or casting machine or apparatus of the kind hereinbefore
described, the application and use of a circular annular pear shaped "runner or
'gate "attached to the outer shell substantially as shewn in and described with
reference to Fig. 1. of the Drawings.
"
"
5. In a moulding or casting machine of the kind hereinabove described wherein
the core is made in parts secured in their relative positions at the upper ends in
the manner set forth above and wherein the "runner or "gate" is of circular
annular form making the headpiece Q, to act as the dam portion of the
runner" ог gate" substantially as described with reference to Fig. 1. of the
Drawings.
"
"
6. In a moulding or casting machine of the kind hereinabove described,

page_text: securing the core in position by means of a central bolt having a collar and head at
the top and. screwed into the base plate of the mould or chill at the bottom
substantially as shewn in and described with reference to Fig. 1, of the Drawings.
7. The combination of parts constituting the vertical centrifugal machine or
apparatus for moulding or casting corrugated tubes or flues, constructed, arranged
and operating as described with reference to Figs. 1, to 4, of the Drawings.
In witness whereof we the said Samson Fox and Joseph Whitley, have
hereunto set our hands and seals this Tenth day of July, in the year of
our Lord One thousand eight hundred and eighty two.
Witness to the signatures of
4
the said Samson Fox and
Joseph Whitley
THO. E. CRAVEN C.E.
Patent Agent
24 Victoria Chambers
South Parade
Leeds.
SAMSUN
TUA
(4.8.)
JOSEPH WHITLEY. (L.S.)