Improvements in Collapsible Core-bars for use in Casting Metal Pipes, Columns, Cylinders, and the like.
Year: 1899

page_text: Date of Application, 11th Feb., 1899
Complete Specification Left, 9th Nov., 1899--Accepted, 16th Dec., 1899
PROVISIONAL, SPECIFICATION.
Improvements in Collapsible Core-bars for use in Casting Metal Pipes,
Columns, Cylinders, and the like.
We, GEORGE WILLIAM CROMPTON, of Stanton Hall, Gentleman, and FREDERICK
CHAMBERS, of Stanton by Dale, Assistant Foundry Manager, both in the County
of Derby, do hereby declare the nature of this invention to be as follows:-
-
This invention relates to collapsible core-bars for use in casting metal pipes,
columns, cylinders, and the like of the type in which the cylinder or shell of
the core is formed in a plurality of segments or parts forming lengthwise a
number of divisions of the shell, of which segments or parts of the shell are
shaped and arranged to fit against and cooperate in use with a central piece
or wedge, such wedge piece or wedge bar serving when the core bar is expanded
to very nearly fill the space between the sides of parts of the shell and to com
plete the external circular contour of the core; whilst when the edge is re-
tracted into the hollow body of the core bar these side parts of the shell are
allowed to approach each other-
-or are collapsed.
According to the present invention the shell is formed of a plurality of
segments or parts capable of being collapsed upon withdrawal of the wedge bar.
For example, in describing the improved construction, a core bar having
three segments and a wedge bar is herein adopted as the form under notice.
The adjacent edges of the segments abutting are formed with jointing or hinging
parts shaped as part cup and ball joints, the part cups and balls being in
alternate positions on the meeting edges of the segments. The movements of
the two segments whose hinged edges meet and turn on the central or pivot
segment and whose outer edges nearly meet and cooperate with the wedge
bar when expanded, are controlled as to the extent of their relative movements
by means of rods, or bars and screw nuts, or their equivalent. These bars pass
diagonally from one segment to the one opposed thereto, being secured in holes
and recesses in the segments of the shell in which the heads of the bolts or
rods and the nuts thereof lie snugly ensconced, and these rods co-acting with the
wedge bar keep the whole shell true to form, rigid and resistent to the various
strains incidental to the successive operations from the forming of the core to
the casting of the pipe or article being manufactured.
This wedge bar is linked, or similarly connected to the pivot member of the
segments of the shell on which suitable parts for such attachments are formed
and upon this wedge bar are formed the wedges, which constitute its designation,
and which slide relatively on other wedge parts formed on parts projecting from
the said pivot segment, so that as the wedge bar is drawn in the one, or the other
direction, the hinged segments are distended and the bar completes the expanded
form, or when the bar is retracted the segments fall inwardly. Suitable parts
form stops for the wedge bar. End parts on the pivot segments afford bearings
or supports for the axes of the core bars,

page_text: The sand, or core mould is applied and the parts are employed as will be well
understood by those conversant practically with this class of manufacture.
Dated the 11th day of Febr 1809
WM. BROOKES & SON,
55, & 56, Chancery Lane, London, Agents for the Applicants,
Improvements in Collapsible Core-bars for use in Casting Metal Pipes,
Columus, Cylinders, and the like.
We, GEORGE WILLIAM CROMPTON, of Stanton Hall, Gentleman, and FREDERICK
CHAMBERS, of Stanton by Dale, Assistant Foundry Manager, both in the County
of Derby, 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:-
a
This invention relates to collapsible core bars for use in casting metal pipes,
columns, cylinders, and the like of the type in which the cylinder or shell of
the core is formed in a plurality of segments or parts forming lengthwise
number of divisions of the shell, of which segments or parts of the shell are
shaped and arranged to fit against and cooperate, in use, with a central piece
or wedge, such wedge piece, or wedge bar serving when the core bar is expanded
to very nearly fill the space between the sides of parts of the shell and to com-
plete the external circular contour of the core; whilst when the edge is re-
tracted into the hollow body of the core, bar these side parts of the shell are
allowed to approach each other-or are collapsed.
According to the present invention the shell is formed of a plurality of
segments or parts capable of being collapsed upon withdrawal of the wedge bar.
For example in describing the improved construction, a core bar having
three segments and a wedge bar is herein. adopted as the form under notice.
The adjacent edges of the segments abutting are formed with jointing or hinging
parts shaped as part cup and ball joints, the part cups and balls being in
alternate positions on the meeting edges of the segments. The movements of
the two segments whose hinged edges meet and turn on the central or pivot
segment and whose outer edges nearly meet and cooperate with the wedge
bar when expanded, are controlled as to the extent of their relative movements
by means of rods or bars and screw nuts, or their equivalent. These bars pass
diagonally from one segment to the one opposed thereto, being secured in holes
and recesses in the segments of the shell in which the heads of the bolts or
rods and the nuts thereof lie snugly ensconced, and these rods coacting with the
wedge bar keep the whole shell true to form, rigid and resistent to the various
strains incidental to the successive operations from the forming of the core to
the casting of the pipe or article being manufactured.
This wedge bar is linked or similarly connected to the pivot member of the
segments of the shell on which suitable parts for such attachments are formed
and upon this wedge bar are formed the wedges which constitute its designation,
and which slide relatively on other wedge parts formed on parts projecting from
the said pivot segment, so that as the wedge bar is drawn in the one, or the other
direction, the hinged segments are distended and the bar completes the expanded
form, or when the bar is retracted the segments fall inwardly. Suitable parts
form stops for the wedge bar. End parts on the pivot segment afford bearings
or supports for the axes of the core bars.

page_text: The sand, or core mould is applied and the parts are employed as will be well
understood by those conversant practically with this class of manufacture.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shows a longitudinal section of the shell and its adjuncts the wedge bar
and links being shown in full lines.
Fig. 2 shows a front view of the core bar taken at a right angle to Fig. 1.
Figs. 3 and 4 show sections taken transversely of Fig. 2 on the lines 1-1, 2-2
and respectively looking towards the left hand and towards the right of the middle
of the bar.
Fig. 5 is an end view looking at the right hand end of the core bar.
Figs. 6, 7, 8 and 9 are details of the semi-spherical joints of the parts of the shell.
a is the pivot segment of the collapsible core bar. b and c are other segments.
d is the wedge bar. are links connecting the same to the parts e attached to
the pivot member. f, f are the pivots. a', a¹ are the cup and ball attachments
between the segments a, b and c. g, g, are rods which control the movements of
the segments and relatively to the pivot member. glare heads of bolts,
and nuts which lie snugly ensconced in the recess provided for them in the
segments c and d. 2 are inclines on the wedge bar which cooperate with
inclines and c¹ on the segments b and c respectively.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. In a core bar a plurality of segments forming a shell, provided with jointing
or hinging parts shaped as cup and ball joints, inclines and connecting rods and
uuts in combination with a wedge bar, and link connections between the shell and
bar, substantially as set forth.
2. In a core bar a plurality of segments linked together by ball and socket
shaped hinge connections, substantially as set forth.
3. The combination or arrangement and use of the parts of a core bar, substan-
tially as and for the purpose hereinbefore set forth and shown by the drawings.
Dated the 9th day of November 1899.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicants.