IMPROVEMENTS IN SULPHURING YARNS AND FABRICS."
Year: 1866

page_text: LETTERS PATENT to John Dale and John Gallemore Dale, of the City of
Manchester, in the County of Lancaster, Chemists, for the Invention of
"IMPROVEMENTS IN SULPHURING YARNS AND FABRICS."
PROVISIONAL SPECIFICATION left by the said John Dale and John
Gallemore Dale at the Office of the Commissioners of Patents, with
their Petition, on the 18th October 1866.
We, JOHN DALE and JOHN GALLEMORE DALE, of the City of Manchester, in
the County of Lancaster, Chemists, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN SULPHURING YARNS AND FABRICS," to be as
follows:-.
Our Invention consists in an improved method of treating with sulphurous
acid (commonly called "sulphuring") wool, woollen yarn, and fabrics. This
operation has hitherto been effected by hanging the goods in a room and after-
wards filling the room with sulphurous acid produced by burning a certain
quantity of sulphur, or in some cases passing by means of rollers the goods
through a room provided with a draught, and into which room sulphurous
acid is introduced by the combustion of sulphur from the outside.
The first part of our improvements consists in placing the goods in air-
tight vessels capable of sustaining some pressure, and provided with arrange-
ments for the introduction of steam, and into such vessels a quantity of
sulphurous acid, either alone or mixed with steam, and produced by the
decomposition of sulphuric acid, by charcoal, or the combustion of sulphur in
contact with air, in which latter case a force pump is used, whereby the

page_text: sulphurous acid is forced into the vessel. When piece goods are required to
be treated with sulphurous acid they may be wound on a perforated pipe and
the sulphurous acid forced through them, either alone or mixed with steam;
or water may be supersaturated with sulphurous acid and used in closed
vessels in the manner described, instead of using sulphurous acid vapour.
The second part of our improvements consists in washing the wool or
fabric in the same vessels in which the sulphuring has been effected, and this
is done by forcing either steam or water through them.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Dale and John Gallemore Dale in the Great Seal 1
Patent Office on the 13th April 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
DALE and JOHN GALLEMORE DALE, of the City of Manchester, in the County
of Lancaster, Chemists, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of October, 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
John Dale and John Gallemore Dale, Her special license that we, the said
John Dale and John Gallemore Dale, our executors, administrators, and
assigns, or such others as we, the said John Dale and John Gallemore Dale,
our 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 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
SULPHURING YARNS AND FABRICS," upon the condition (amongst others) that
we, the said John Dale and John Gallemore Dale, our executors or adminis-
trators, by an instrument 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.
NOW KNOW YE, that we; the said John Dale and John Gallemore Dale;
do hereby declare the nature of our said Invention, and in what manner the

page_text: same is to be performed, to be particularly described and ascertained in and
by the following statement (that is to say):—
Our Invention consists in an improved method of treating with sulphurous
acid (commonly called "sulphuring") wool, woollen yarn, and fabrics.
This operation has hitherto been effected by hanging the goods in a room
and afterwards filling the room with sulphurous acid produced by burning a
certain quantity of sulphur, or in some cases passing by means of rollers
the goods through a room provided with a draught, and into which room
sulphurous acid is introduced by the combustion of sulphur from the outside.
The first part of our improvements consists in placing the goods in air-
tight vessels capable of sustaining some pressure, and provided with arrange-
ments for the introduction of steam, and into such vessels a quantity of
sulphurous acid, either alone or mixed with steam, and produced by the
decomposition of sulphuric acid by charcoal, or the combustion of sulphur in
contact with air, in which latter case a force pump is used, whereby the
sulphurous acid is forced into the vessel. When piece goods are required to
be treated with sulphurous acid they may be wound on a perforated pipe and
the sulphurous acid forced through them, either alone or mixed with steam ;
or water may be supersaturated with sulphurous acid and used in closed
vessels in the manner described instead of using sulphurous acid vapour.
The second part of our improvements consists in washing the wool or
fabric in the same vessels in which the "sulphuring," has been effected, and
this is done by forcing either steam or water through them.
In witness whereof, I, the said John Dale, for and on behalf of myself
and the said John Gallemore Dale, have hereunto set my hand and
seal, this Twelfth day of April, in the year of our Lord One thousand
eight hundred and sixty-seven.
Signed, sealed, and delivered
by the within-named John
Dale, in the presence of
E. J. HUGHES,
Patent Agent,
Manchester.
JOHN DALE. (L.S.)