IMPROVEMENTS IN PURIFYING ROSIN OR OTHER SUBSTANCES OF A SIMILAR KIND AND CHARACTER
Year: 1864

page_text: LETTERS PATENT to Frederick George Mulholland, of No. 86, Essex
Street, Strand, in the City of Westminster and County of Middlesex,
Civil Engineer, for the Invention of "IMPROVEMENTS IN PURIFYING ROSIN
Sealed the 30th May 1865, and dated the 13th December 1864.
PROVISIONAL SPECIFICATION left by the said Frederick George Mul-
holland, at the Office of the Commissioners of Patents, with his Petition,
on the 18th December 1864.
I, FREDERICK GEORGE MULHOLLAND, of No. 36, Essex Street, Strand, in the
City of Westminster and County of Middlesex, Civil Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN. PURIFYING
ROSIN OR OTHER SUBSTANCES OF A SIMILAR KIND AND CHARACTER," to be as
follows:-
My Invention consists of arrangements whereby rosin is purified. It is
found in practice that the action of flame impinging against the boiler or pan
in which the raw or crude material is contained invariably thickens and colors
the substances subjected to the action of beat. By my improved process I
use superheated steam and double pans and liquify the matters. I desire
to refine and afterwards run off same through a filter to obtain a pure article
free from extraneous matter. To obtain a superior description of rosin I

page_text: crush the product described and submit same to distillation causing the
vapour on its way to the condenser to pass through a chamber containing an
admixture of nitric acid with water mixed in the proportion of 12 to 1.
Finding also that rosins if allowed to be in contact with ordinary metal retains
its color and is injuriously affected in a commercial sense by the escape
of the essential oil, I coat or line the vessels with tin or other metal, and on
drawing off each charge of the purified material, expose same to the action of
highly rarified air, to dispel all or any moisture that may be present.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick George Mulholland in the Great Seal Patent Office
on the 13th June 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK.
GEORGE MULHOLLAND, of 36, Essex Street, Strand, in the City of West-
minster, in the County of Middlesex, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of December, in the year of our
Lord One thousand eight hundred and sixty-four, in the twenty-eighth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Frederick George Mulholland, Her special licence that I, the
said Frederick George Mulholland, my executors, administrators, and assigns, or
such others as I, the said Frederick George Mulholland, my executors, adminis-
trators, 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, úsé, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN ARRANGEMENT OF APPARATUS AND.
TREATMENT FOR PURIFICATION OF RESINOUS MATTERS," upon the condition (amongst
others) that I, the said Frederick George Mulholland, my executors or adminis
trators, by an instrument in writing under my, or their, or one of 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.
NOW KNOW YE, that I, the said Frederick George Mulholland, do hereby
declare the nature of my said Invention, and in what manner the same.

page_text: is to be performed, to be particularly described and ascertained in and by the
following statement :-
My Invention consists of arrangements, both mechanical & chemical,
whereby resin or other substances & matters of a like kind and character
are purified and decolorized. It is found in practice that flame impinging
against the vessel in which the raw material is contained increases the tone or
depth of its original color. By my improved processes I clarify the matters I
desire to refine firstly, and as speedily as possible run same off through filters.
I afterwards crush these products and submit the same to distillation, con-
tinuing the action of steam, forcing the resinous vapours through a condensor
and a chamber filled with chemical gases. I invariably coat or line the pans
or vessels containing the material with a vitreous or ceramic composition
to prevent the material from coming in actual contact with the metal; 'on
drawing each successive charge I pass the purified material through a drying
room to dispel any moisture present from the steam used in the operation.
In witness whereof, I, the said Frederick George Mulholland have here-
unto set my hand and seal, this 18th day of June, A.D. 1865.
FRED. G. MULHOLLAND. (LS.)