AN AIR STOVE APPARATUS FOR THE EXHALATION AND CONDENSATION OF VAPOURS
Year: 1830

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ANDREW
URE, of Southampton Row, in the County of Middlesex, M.D., send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Twentieth day of October, in the first year of His reign,.
did, for Himself, His heirs and successors, give and grant unto me, the said
Andrew Ure, His especial licence, full power, sole privilege and authority,
that I, the said Andrew Ure, my exors, admors, and assigns, and such others
as I, the said Andrew Ure, my exors, adñors, or assigns, should at any time
agree with, and no others, from time to time and at all times during the term
of years therein mentioned, should and lawfully might make, use, exercise,
and vend, within England, Wales, and the Town of Berwick-upon-Tweed, and
also in all His said Majesty's Colonies and Plantations abroad, my Invention
of "AN AIR STOVE APPARATUS FOR THE EXHALATION AND CONDENSATION OF
VAPOURS;" in which said Letters Patent is contained a proviso that I, the said
Andrew Ure, shall cause a particular description of the nature of my said
Invention, and in manner the same is to be performed, to be inrolled in His
said Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said in part recited Letters Patent, as in and
by the same, reference being thereunto had, will more fully and at large
appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Andrew Ure, do hereby declare that the nature of my said Invention, and

page_text: in what manner the same is to be performed, is particularly described and
ascertained in and by the following description thereof (reference being had to
the Drawing hereunto annexed, and to the figures and letters marked thereon,
(that is to say):
The nature of my said Invention consists in drawing a stream of air by an
exhauster through a chamber over the surface of any moist substanco so
heated as to exhale vapours, and then propelling the mingled air and vapours
as they issue from the chamber into a body of cold water or other absorbing
substance for the purpose of condensation. The manner in which I perform
this exhaling and condensing process is as follows:-I construct a chamber of
a rectangular or other form, generally oblong, of which the height is much
less than the breadth. This chamber may be made of stone, brick, wood,
metal, or other suitablo materials, and its solo may be heated from beneath
by a fire flue, by steam, hot water, or other hot liquids. Into one end of the
chamber a sliding door is fitted, having its bottom close to the sole, and into
the other end immediately beneath the roof or cover an opening is made for
the discharge of the vapours, to which opening is attached an exhausting
and forcing pump, piston, bellows, or fanner, for first drawing off the air and
vapours, and then propelling them into a cistern of condensation. In working
with this apparatus the door plate must never be slid quite down to the bottom,
but a stratum of air, more or less thick, according to the size and heat of the
chamber, must be admitted, to favor the exhalation. For this reason I call this
Invention "An Air Stove Apparatus."
Now whereas I claim as my said Invention the drying of moist substances,
exposed on a warm sole or floor, by the combined action of the stream of air
drawn in by the sucking part of the pump, with the propulsion of the mingled
air and vapours by the forcing part of the pump into the liquid of a condensing

page_text: fluid to communicato heat to the medium contained in the cistern. The pipe
may be bent in any manner most conducive to the equal distribution of its
temperature, but it should gently slope down from the entrance orifice A to the
discharge B. I, K, one of the cross bars that support the weight of the
drying chamber E. F, the line of the lid marked F in Fig. 1. Under this lid
is placed the heat regulator G, fixed towards F, moveable towards E, where its
shears are connected with the lever of the valve H. Whenever the temperature
of the medium in the cistern has reached the desired degree, namely, the most
suitable for drying the substance in the superjacent chamber, the thermostat
shuts the steam valve. The thermostat is a heat-regulating instrument,
described under that name in the Specification of niy Patent for "An Apparatus
for Regulating Temperature in Vaporization, Distillation, and other Pro-
cesses," dated the Twentieth day of October last, and to which a Specification
has been duly enrolled this Twentieth day of April. The above described air-
stove apparatus is peculiarly adapted for drying raw sugar without injury to its
grain. The sugar should be stirred or raked over from time to time.
In witness whereof, I, the said Andrew Ure, have hereunto set my hand
and seal, this Twentieth day of April, in the year of our Lord One
thousand eight hundred and thirty-one.