IMPROVEMENTS IN THE TREATMENT OF XYLOIDINE TO BE EMPLOYED FOR PURPOSES USEFUL IN THE ARTS.
Year: 1870

page_text: LETTERS. PATENT to Daniel Spill, of Paradise Terrace, Hackney, in
the County of Middlesex, for the Invention of "IMPROVEMENTS IN
THE TREATMENT OF XYLOIDINE TO BE EMPLOYED FOR PURPOSES USEFUL IN THE
ARTS.
"
Sealed the 12th July 1870, and dated the 20th January 1870...
PROVISIONAL SPECIFICATION left by the said Daniel Spill at the
Office of the Commissioners of Patents, with his Petition, on the
20th January 1870.
I, DANIEL SPILL, of Paradise Terrace, Hackney, in the County of
Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE TREATMENT OF XYLOIDINE TO BE EMPLOYED FOR PURPOSES
USEFUL IN THE ARTS," to be as follows:-
This Invention relates to an improved method of preparing xyloidine
of an improved color, whether such xyloidine be produced from fibres
or materials in their normal condition, or when colored or dyed, and
consists in subjecting xyloidine or soluble gun cotton produced from
the before mentioned materials to the action of a bleaching agent, such,

page_text: for example, as sulphurous acid, or of sulphites, or of chloride of lime,
chlorine, or of such combinations of chlorine as may effect its bleaching
or decolorisation.
4
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Daniel Spill in the Great Seal Patent Office on the
20th July 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DANIEL
SPILL, of Paradise Terrace, Hackney, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of January, in the
year of our Lord One thousand eight hundred and seventy, in the
thirty-third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Daniel Spill, Her special license, that
I, the said Daniel Spill, my executors, administrators, and assigns, or
such others as I, the said Daniel Spill, my executors, administrators,
or 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 THE TREATMENT
OF XYLOIDINE TO BE EMPLOYED FOR PURPOSES USEFUL IN THE ARTS," upon the
condition (amongst others) that I, the said Daniel Spill, my executors
or administrators, 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 Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said: Daniel Spill, do hereby declare the
nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement :→
This Invention relates to an improved method of preparing xyloidine
of an improved, color, whether such xyloidine be produced from fibres

page_text: or materials in their normal condition or when colored or dyed, and
consists in subjecting xyloidine or soluble gun cotton produced from the
before mentioned materials to the action of a bleaching agent, such for
example as sulphurous acid or of sulphites, or of chloride of lime,
chlorine, or of such combinations of chlorine as may effect its bleaching
or decolorization.
In carrying out my Invention I proceed as follows:-The fibres or other
materials capable of producing xyloidine by the action of a mixture of
sulphuric and nitric acids after having been converted into such com-
pound is to be by preference freed from any residual acid it may contain,
as is well understood, and is then placed in a vat or vessel and submitted
to the action of a bleaching agent, such for example as a solution of
chloride of lime, or to the action of a solution of chlorine, or to the action
of a solution of sulphurous acid, or of a soluble sulphite, until the desired
decolorization or bleaching has been produced. Such result having been
obtained the bleached or decolorized xyloidine is then freed by washing
with water from any residual bleaching agent or soluble compound
resulting from the employment of such bleaching agents, and when freed
from the excess of water by means either of pressure or by a drying
process, or by means of a combination of the two processes may then be
either dissolved or rendered plastic by any of the known solvents, or may
be otherwise treated so as to be capable of employment for useful
purposes in the arts.
Having now described my Invention, I desire it to be understood
that I claim, the production of bleached or decolorized xyloidine from
dyed or colored fibres or materials by submitting the converted fibres
or materials to the action of a solution of chloride of lime or to the
action of a solution of chlorine, or to the action of a solution of sul-
phurous acid, or of a soluble sulphite, as herein-before described.
In witness whereof, I, the said Daniel Spill, have to this my
Specification set my hand and seal, this Eighteenth day of July
One thousand eight hundred and seventy.