IMPROVEMENTS IN THE MANUFACTURE, SUBLIMATION, AND DISTILLATION OF SULPHUR, Salts, TAR, OIL, FATS, QUICKSILVER, AND OTHER SUBSTANCES OF A SIMILAR NATURE
Year: 1872

page_text: LETTERS PATENT to John Ambrose Coffey, of No. 3, Bucklersbury, in
the City of London, Engineer, for the Invention of "IMPROVEMENTS
IN THE MANUFACTURE, SUBLIMATION, AND DISTILLATION OF SULPHUR, Salts,
TAR, OIL, FATS, QUICKSILVER, AND OTHER SUBSTANCES OF A SIMILAR
NATURE
"
Sealed the 18th June 1872, and dated the 8th January 1872.
PROVISIONAL SPECIFICATION left by the said John Ambrose Coffey
at the Office of the Commissioners of Patents, with his Petition,
on the 8th January 1872.
⚫I, JOHN AMBROSE COFFEY, of No. 3, Bucklersbury, in the City of
5 London, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE MANUFACTURE, SUBLIMATION, AND DISTILLATION OF
SULPHUR, SALTS, TAR, OIL, FATS, QUICKSILVER, AND OTHER SUBSTANCES OF A
SIMILAR NATURE," to be as follows:— .
I place the crude sulphur, salts, tar, or other material in a still, retort,

page_text: or other suitable vessel, which I encase in an outside jacket in some
cases, and in others I cither use it or dispense with it and introduce a
'heated mass into tubes, or ducts, or any other well-known form which
will encase the heating material and prevent it, unless through con-
vexion, to impart its caloric to the material to be operated upon. The
heated mobile substance I obtain from a dense paraffin oil or any other
such substance or fluid that imparts its heat and maintains its mobility.
The form of apparatus I have adopted so far for producing and con-
trolling this heated material is as follows, subject of course to modifi-
cations when necessary:-I have a vessel, which I term my supply,
return, and expansion cistern, in which I place the heavy paraffin oil or
other such substance or fluid, and circulate it by an outlet and inlet
(both open, thereby avoiding all pressure from heat,) through pipes or
ducts to a zig-zag, worm, or other form of pipes or ducts, boiler shape or
other form, which I place in a stove, furnace, fusible or sand bath, the
oil passing in at one end and returning heated from the other, which I
convey to a pyrometer indicating 1,500° Fahrenheit, so that I can
accurately know the temperature of the fluid, and thereby also regulate
the temperature of the mobile substance to the retort or still to the
material to be operated upon. The circulation may be maintained by
a pump or the well-known principle of the hot water apparatus, by which
means I ensure the steady and controllable heat to the substances under
oncration.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Ambrose Coffey in the Great Seal Patent
Office on the 8th July 1872.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of January, in the year
of our Lord One thousand eight hundred and seventy-two, in the
thirty-fifth year of Her reign, did, for Herself, Her beirs and successors,
give and grant unto me, the said John Ambrose Coffey, Her
special licence that I, the said John Ambrose Coffey, my execu-
tors, administrators, and assigns, or such others as I, the said John
Ambrose Coffey, 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
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 MANUFACTURE, SUBLIMATION, AND DISTIL-
LATION OF SULPHUR, SALTS, TAR, OIL, FATS, QUICKSILVER, AND OTHER SUBSTANCES
OF A SIMILAR NATURE," upon the condition (amongst others) that Ì,
the said John Ambrose Coffey, my executors or administrators, 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 Scal Patent Office within six
calendar months next and immediately after the date of the said Lotters.

page_text: the manipulation of the exact temperature required in operation, are
amongst the important and peculiar points of my said Invention.
In witness whereof, I, the said John Ambrose Coffey, have here-
unto set my hand and seal, this Eight day of July, in the year
of our Lord One thousand eight hundred and seventy-two.
E