IMPROVEMENTS IN CORE BARS OR BARRELS
Year: 1866

page_text: LETTERS PATENT to Thomas Horsley, of Kirkly Hall, Pinxton, in the
County of Nottingham, Civil Engineer, and George Knighton, of Riddings,
near Alfreton, in the County of Derby, Foreman of Fitters, for the
PROVISIONAL SPECIFICATION left by the said Thomas Horsley and George
Knighton at the Office of the Commissioners of Patents, with their
Petition, on the 8th November 1866.
We, THOMAS HORSLEY, of Kirkley Hall, Pinxton, in the County of Notting-
ham; Civil Engineer, and GEORGE KNIGHTON, of Riddings, near Alfreton, in
the County of Derby, Foreman of Fitters, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN CORE BARS OR BARRELS," to be as
follows:-
This Invention has for its object improvements in core bars, or barrels.
In constructing core bars; or barrels, a metallic cylinder is employed which
is divided into sections, by preference into three sections, and these sections
arë' hinged together, this however is'not new.
The present Invention consists in the manner in which the sections are
retained in the' expanded state, and by which the sections are caused to
contract, in order to admit of the core being withdrawn from a casting. It
is preferred that two of the sections of which a core bar or barrel is composed

page_text: should be comparatively large, whilst the third section should be comparatively
small, and that the small section should be hinged in such manner as to admit
of its opening inwards. This small section has on its inner surface a sliding
bolt sliding in staples or guides, this sliding bolt has on it projecting fingers
or catches, which when the cylinder is expanded to its full dimensions, and
the bolt is slid enter staples or catches fixed on the interior of the cylinder,
and by such means the core is retained in its expanded condition, but on
sliding back the sliding bolt the fingers or projections therein pass out
of the staples or catches, and the smaller section readily falls or is moved
inwards, and then the other parts can readily contract also.
Another arrangement also consists in having one section, usually the small
section, hinged in such manner as to open outwards, and slightly to lap by its
other edge over the edge of the next section, and to lock or fasten the sections
together by a central axis or bolt, having on it near each end and centre, if
required, a double dovetailed piece which enters openings formed in ends
fixed respectively to the small section and to one of the other sections, so that
when the dovetail projections on the central bar .or axis are in the dovetail
openings formed in the fixed ends of the sections, the whole of the sections
will be retained in the expanded state, but in moving the dovetail
projections out of the dovetail openings the sections will be at liberty to
contract.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Horsley and George Knighton in the Great Seal
. .Patent Office on the 8th May 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
HORSLEY, of Kirkley Hall, Pinxton, in the County of Nottingham, Civil
Engineer, and GEORGE KNIGHTON, of Riddings, near Alfreton, in the County
of Derby, Foreman of Fitters, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of November, in the year of our Lord
One thousand eight hundred and sixty-six, in the, thirtieth year of Her
reign, did, for Herself, Her heirs and successors; give and grant unto
us, the said Thomas Horsley and George Knighton, Her special licence
that we, the said Thomas Horsley and. George Knighton, our executors,
administrators, and assigns, or such others as we, the said Thomas Horsley
and George Knighton, our executors, administrators, and assigns, should at

page_text: any time agree with; and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN CORE BARS. OR BARRELS," upon the condition (amongst others) that
we, the said Thomas Horsley and George Knighton, our executors or
administrators, by an instrument in writing under our or their hands and seals,.
or under the hand and seal of one of us or them, 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.
NOW KNOW. YE, that I, the said Thomas Horsley, on behalf of
myself and [the said George. 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, that is to say:
This Invention has for its object improvements in core bars or barrels. In
constructing core bars. or. barrels a metallic cylinder is employed which is
divided into sections, by preference into three sections, and these sections are
hinged together, this however.is not new.
The present Invention. consists in the manner in which the sections are
retained in the expanded state, and by which the sections are caused to con-
tract in order to admit of: the core being withdrawn from a casting, this is done
by means of a sliding bar mounted on one of the outer sections, and which
carries taper keys or wedges which enter and are held by corresponding sockets
on the other outer section. It is preferred that two of the sections of which a core
bar or barrel is composed.should be comparatively large, whilst the third section
should be comparatively small, and the small section is hinged in such manner
as to admit of its opening inwards., This small section has on its inner surface
the sliding bar or bolt sliding in staples or guides, this sliding bolt has on it
projecting fingers with keys, wedges, or catches thereon, which when the cylinder
is. expanded to its full dimensions and the bolt is slidden endwise-enter sockets,
staples, or catches,fixed on the interior of another section, of the cylinder, and
by such means the core is retained in its, expanded condition, but on sliding
back the sliding bolt the fingers with the keys or projections thereon pass out
of the sockets, staples, or catches, and the smaller section readily falls or is
moved inwards, and; then the other parts can readily contract also.
Figure 1. is a side view of a large core bar or barrel constructed according to

page_text: .
this part of our Invention; Figure 2 is a transverse section, and Figure 3 is a.
longitudinal section of the same on a larger scale.
The first section a of the bar or barrel is supported from the axis 6 by the
the
radial arms c, c, keyed on to the axis, and bolted to the section or piece a;
second section d is similar to the section a, and is connected with it by hinge
joints e; the third section f is conveniently made much narrower than the
other two and is similarly jointed to the section a, on it is mounted the bar 9,
it is carried in guides or bearings in such manner as to be able to slide
longitudinally, and it has upon it arms g', g', which carry at their' ends taper
keys or wedges, which when the bar is slidden endwise in its grooves enter
corresponding sockets h fixed to the section d, and by forcing the bar g end-
wise the keys are jammed fast into their sockets, and the sections. d and fare
drawn close up and rigidly held together. The bar is coated with loam in the
usual way, and when after casting it is desired to draw the core, bar or barrel
the bar g is struck endwise so as to disengage the taper keys or wedges from
their sockets h, and the section f is then free to turn inwards and the whole
core bar or barrel to be lifted out; i, i, are eyes fixed to the sections a;
and d by which to lift it. It is evident that in place of the arrangement shown
the sliding bar 9 might be carried by the larger section, and the sockets / to.
receive its keys or wedges by the smaller.
According to another part of our Invention we construct core bars or
barrels of sections hinged together, and to the edge of these sections one edge
of a smallar section is connected in such manner as slightly to lap by its other
edge over the edge of the next section, and to lock or fasten the sections:
together we employ a central axis or bolt having on it near each end (and in
long bars at the centre also) a double dovetailed piece which enters grooves
or openings formed in the sections of the core bar or barrel so that the
whole of the sections may be retained by the axis or bolt in the expanded
state, but in moving the dovetail projections out of the dovetail openings the
sections will be at liberty to move inwards, thus contracting the core bar or
barrel.
Figure 4 is a side elevation, Figure 5 a longitudinal section, and Figures 6
and 7 opposite end views on a larger scale of a core bar or barrel con-
structed according to this part of our Invention. It consists of two sections
a and b hinged together by hinges c, and a third small section d which is
attached to the section 6 overlaps the edge of the next section a, and is made
as thin as conveniently can be. Through the centre of the core bar or
barrel runs a loose axis c, which at each end (and it may be also in the middle)
has dovetails fixed upon it tapering all ways, and they enter corresponding

page_text: grooves in the sections a and b. When the axis e is driven from right to
left (see Figure 5) the dovetails jam in their grooves and the parts become
firmly locked together and a set screw f being screwed up prevents them
shifting. The core is coated with loam in the usual way, and after casting,
when it is desired to draw the core bar or barrel, the axis is struck towards
the right so as to free the dovetails, and the sections a and b are then able to
move inwards; g is a disc to prevent the axis moving so far as to allow of the
complete separation of the parts. It is evident that in this arrangement the
dovetails might be on the sections a and b, and the grooves in the axis, but it
would not be so convenient.
In witness whereof, I, the said Thomas Horsley, have hereunto set my
hand and seal, this Fourth day of May in the year of our Lord One
thousand eight hundred and sixty-seven.