AN IMPROVEMENT IN PATTERNS EMPLOYED IN MAKING MOULDS FOR RAILWAY CHAIRS
Year: 1855

page_text: LETTERS PATENT to Paul Prince, of Derby, in the County of Derby,
Railway Inspector, for the Invention of "AN IMPROVEMENT IN
PATTERNS EMPLOYED IN MAKING MOULDS FOR RAILWAY CHAIRS."
Sealed the 24th April 1855, and dated the 21st February 1855.
PROVISIONAL SPECIFICATION left by the said Paul Prince at the
Office of the Commissioners of Patents, with his Petition, on the 21st
February 1855.
I, PAUL PRINCE, of Derby, in the County of Derby, Railway Inspector,
do hereby declare the nature of the Invention for "AN IMPROVEMENT IN
THE PATTERNS EMPLOYED IN MAKING MOULDS FOR RAILWAY CHAIRS" to be as
follows:-
This Invention consists of making each pattern of a railway chair of two
parts connected by a hinge or axis, by which, when a mould has been formed
on the pattern,. one part of the pattern may be caused to move on its axis,
and thus admit of the pattern being more conveniently taken from the
mould.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Paul Prince in the Great Seal Patent Office on the
18th August 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PAUL
PRINCE, of Derby, in the County of Derby, Railway Inspector, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of February, in the year of our Lord
One thousand eight hundred and fifty-five, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Paul Prince, Her special licence that I, the said Paul Prince, my
executors, administrators, and assigns, or such others as I, the said Paul
Prince, my executors, 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 night make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands and Isle of Man, an Invention for "AN IMPROVEMENT IN THE PATTERNS
EMPLOYED IN MAKING MOULDS FOR RAILWAY CHAIES," upon the condition (amongst
others) that I, the said Paul Prince, by an instrument in writing under my
hand and seal, 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 Patont Office within six calendar
months next and immediately after the date of the said Letters Patent.
.
NOW KNOW YE, that I, the, said Paul Prince, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof (that is to say):-
This Invention consists of making each pattern of a. railway.chair of two
parts connected by a hinge or axis, by which, when a mould has been formed
on the pattern, one part of the pattern may be caused to move on its
axis, and thus admit of the pattern being more conveniently taken from the
mould.
Having thus stated the nature of my said Invention, I will proceed to
describe the manner of performing the same.
DESCRIPTION OF THE DRAWING

page_text: The pattern consists of two parts, a and b, which are connected together
by the pin or hinge joint c. It will be seen, as shewn by the dotted lines, that
the outline of the part a of the pattern is of such a form that in moving it
upon the hinge c, whilst the other part 6 remains in the mould, that half of
the pattern will readily come out of the sand without disturbing it, and then
the part 6 of the pattern may be lifted out in the usual manner.
I would remark that the forms of railway chairs may differ, and patterns
may be made according to my Invention to suit such differences of form; but
in all cases the patterns used for making the moulds are each to be of two
parts, and one part is to be made capable of delivering itself from the mould
by being turned or moved on its axis or hinge; and in cases where the desired
form of chair is such as not to allow of the part a moving on the hinge, as
is shown in the form Figure 4, I make the projecting part d to slide and
withdraw within the line of curvature, as is shewn by dotted red lines at e,
and it is convenient to prolong this sliding piece so as to form a handle to lift
the pattern by. I have found also that several patterns may be worked upon
a common axis or hinge, and they may be so connected as to form a jointed
moulding board, as is well understood by ironfounders.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have understood that what I claim is, the
construction of the patterns used for making moulds for casting railway chairs,
each of two parts, with or without a sliding piece, and combined or otherwise,
as herein explained.
In witness whereof, I, the said Paul Prince, have hereunto set my hand
and seal, this Seventeenth day of August, in the year of our Lord
One thousand eight hundred and fifty-five.
PAUL PRINCE. (L.S.)
Witness,
JNO. ECKERSLEY,
Clerk in Engineering Department
of the Midland Railway, Derby.