IMPROVE- MENTS IN CORE BARRELS FOR CASTING PIPES, CYLINDERS, RETORTS, AND OTHER LIKE HOLLOW ARTICLES"
Year: 1861

page_text: LETTERS PATENT to Thomas Gibson, of Staveley Works, in the County
of Derby, Manager, and William Knighton, and Henry Knighton, also
of the said Works, Foreman Moulders, for the Invention of "IMPROVE-
MENTS IN CORE BARRELS FOR CASTING PIPES, CYLINDERS, RETORTS, AND OTHER
LIKE HOLLOW ARTICLES"
PROVISIONAL SPECIFICATION left by the said Thomas Gibson, William
Knighton, and Henry Knighton, at the Office of the Commissioners of
Patents, with their Petition, on the 24th January 1861.
We, THOMAS GIBSON, of Staveley Works, in the County of Derby, Manager,
and WILLIAM KNIGHTON, and HENRY KNIGHTON, also of the said Works,
Foreman Moulders, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN CORE BARRELS FOR CASTING PIPES, CYLINDERS, RETORTS, AND
OTHER LIKE HOLLOW ARTICLES," to be as follows:-
Our Invention consists in placing inside core barrels, brackets carrying
projections or "chipping pieces," and in the employment of a tongue-piece or
key for filling up the space between the two cheeks of the barrel with a tail,
and with projections or "chipping pieces" on the sides thereof. The cheeks
are united by and move upon two or more pairs of binges. For casting, the
tongue-piece is lowered until the chipping pieces on the tail thereof are engaged

page_text: between those on the brackets. To set the barrel at liberty the tongue-piece
is raised or lifted sufficiently to bring the chipping pieces on the tail thereof
clear of those on the brackets.
Our Invention also consists in fitting boxes inside the barrels, carrying
springs for the purpose of keeping the barrels in a state of tension, and also,
when the tongue-piece is raised as before described, for the purpose of assisting
in contracting the barrels.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Gibson, William Knighton, and Henry Knighton in
the Great Seal Patent Office on the 24th July 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
GIBSON, of Staveley Works, in the County of Derby, Manager, and WILLIAM
KNIGHTON, and HENRY KNIGHTON, also of the said Works, Foreman Moulders,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of January, in the year of our Lord
One thousand eight hundred and sixty-one, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Thomas Gibson, William Knighton, and Henry Knighton, Her special
licence that we, the said Thomas Gibson, William Knighton, and Henry
Knighton, our executors, administrators, and assigns, or such others as we,
the said Thomas Gibson, William Knighton, and Henry Knighton, our ex-
ecutors, administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend, within
the United Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN CORE BARRELS FOR CASTING
PIPES, CYLINDERS, RETORTS, AND OTHER LIKE HOLLOW ARTICLES," upon the condition
(amongst others) that we, the said Thomas Gibson, William Knighton, and
Henry Knighton, or one of us, our executors or administrators, by an instru-
ment in writing under our, or their, or one of our or their hands and seals,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that we, the said Thomas Gibson, William Knighton,
and Henry Knighton, do hereby declare the nature of our said Invention,
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement thereof, reference being bad
to the Drawings hereunto annexed (that is to say):-
Our Invention consists in placing inside core barrels, brackets carrying
projections or "chipping pieces," and in the employment of a tongue-piece or
key for filling up the space between the two cheeks of the barrel, with a tail
and with projections or "chipping pieces" on the sides thereof. The cheeks
are united by and move upon two or more pairs of hinges. For casting, the
tongue-piece is lowered until the chipping pieces on the tail thereof are
engaged between those on the brackets. To set the barrel at liberty tho
tongue-piece is raised or lifted or moved sufficiently to bring the chipping-
pieces on the tail clear of those on the brackets or clear of the brackets.
themselves.
Our Invention consists in fitting boxes inside the barrels, carrying springs
for the purpose of keeping the barrels in a state of tension, and also, when the
tongue-piece is raised or moved, as before described, for the purpose of assisting.
in contracting the barrels.
Figure 1 of the accompanying Drawings is an external elevation of a coro
barrel (with parts broken away) constructed according to our Invention;
Figure 2 is a longitudinal, and Figure 3, a vertical section of the same;.
Figure 4 is a plan of the top, and Figure 5, a plan of the bottom of the barrel.
a is the barrel formed in two pieces or cheeks hinged together, as shown.
at 6, Figure 8; c is a spindle fitted to the top of the barrel in the plate d,
Figure 4, and carrying a winch handle e; f is a spindle fitted to the bottom
of the barrel in the plate g, Figure 5, about which it is free to revolve when
the loam can be put on the barrel, either in a horizontal or vertical position,
as may be required, and as hereafter explained; h is the key,. detached views
of which are given at Figures 6, 7, and 8, in side elevation and vertical
sections; it is inserted in the barrel and rests upon rods i, i, which pass through
slots j, j, formed in the tail k, k, of the key; 1, 1, are the projections or
"chipping" pieces formed on the tail; m, m, are brackets on the inside of the
cheeks of the barrel formed with projections or "chipping" pieces n, n, or
otherwise. When the core barrel is contracted, the "chipping" pieces on the
tail and brackets are clear of each other; but when the cheeks are expanded,
as hereafter explained, the key is lowered or pressed down and outwards until
it fills the space between the cheeks of the barrel, when the chipping pieces 1, 1,

page_text: and n, n, are brought into the same horizontal line; o, o, Figure 2, are springs
which bear against the sides of the boxes m, m, and against nuts 9, 9, on the
rods i, i.
To expand the cheeks of the barrel, and to fill up the space between them
with the face of the key, we employ a cramp, a view of which, with part of
the barrel in section, is given at Figure 9; we insert the two points of the
jaws r, r, in sockets &, 8, Figure 1, formed in the cheeks and press the jaws
apart by means of the screw t, and with them the cheeks; we then lower the
key, the incline of the slots j, j, at the same time directing it forward until the
face of the key fills the space between the cheeks, and the chipping pieces 1, 1,
and n, n, become interlocked, we next remove the cramp, and the key remains
jammed between the cheeks. In this state we place the barrel in a vertical
or horizontal position, as may be required. For pipes, say up to 24-inches
diameter, we suspend the barrel upon a pair of trestles on the spindles f and c,
when the barrel will be ready for putting on the loam; rotary motion is com-
municated to it by means of the winch handle, whereby cores necessary for
casting pipes, cylinders, retorts, and other like hollow articles are properly
prepared; and for large pipes the spindles f and c may be omitted or removed,
and the cores struck up vertically upon a turntable. In order to withdraw
the core barrel from the pipe or hollow casting after it is cast we insert a lever
in the hole v in the upper part of the key, and draw it upwards. The face of
the key will thereby be drawn inwards clear of the cheeks, and at the same
time the chipping pieces will become disengaged and the circumference of the
barrel so reduced as to enable it to be raised clear of the sides of the pipe or
hollow casting. The springs o, o, assist in causing the cheeks to collapse or
move towards each other upon the hinges b, b, as soon as the face of the key
is removed.
Although we prefer to form the brackets with projections or chipping
pieces, yet simple brackets may be used, it being only requisite for the purposes
of our Invention that there should be abutments on each side of the opening
in the barrel, between which the projections on the tail of the tongue may be
inserted to expand the barrel, and from which they may be released in order
that its circumference may be reduced.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare that we claim as our improve-
ments in core barrels for casting pipes, cylinders, retorts, and other like hollow
articles,―
First, constructing core barrels with brackets carrying projections or

page_text: chipping" pieces, or otherwise, and with a tongue piece or key also provided
with projections or "chipping" pieces, substantially in manner and for the pur-
poses herein-before described and illustrated in the accompanying Drawings.
And, second, fitting boxes inside core barrels, carrying springs for the
purpose of causing them to contract, as herein-before described.
In witness whereof, we, the said Thomas Gibson, William Knighton,
and Henry Knighton, have hereunto set our hands and seals, this
Fourth day of July, One thousand eight hundred and sixty-one.