A CERTAIN NEW INVENTED METHOD OF HEATING THE BOILERS OF STEAM ENGINES WITH A SMALLER QUANTITY OF FUEL THAN IS NOW USED FOR THAT PURPOSE, AND ALSO BY THE FIRE USED IN SUCH BOILERS TO CALCINE ORES AT THE SAME TIME
Year: 1790

page_text: WEARN'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROGER
WEARN, of the Parish of Phillack, in the County of Cornwall, Bricklayer, send
greeting.
WHEREAS His most Excellent Majesty King George the Third by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Eighth day of July, in the Thirtieth year of His reign, did give
unto me, the said Roger Wearn, His special licence that I, the said Roger
Wearn, during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend, within that part of the United Kingdom of
Great Britain called England, the Dominion of Wales, and Town of Berwick
upon Tweed, "A CERTAIN NEW INVENTED METHOD OF HEATING THE BOILERS OF
STEAM ENGINES WITH A SMALLER QUANTITY OF FUEL THAN IS NOW USED FOR THAT
PURPOSE, AND ALSO BY THE FIRE USED IN SUCH BOILERS TO CALCINE ORES AT THE
SAME TIME;" in which said Letters Patent there is contained a proviso obliging
me, the said Roger Wearn, by an instrument in writing under my hand and
seal, to cause a particular description of the nature of my said Invention, and
in what manner the same is to be performed, to be inrolled in His Majesty's
High Court of Chancery within one calendar month next and immediately after
the date of the said recited Letters Patent, as in and by the same, relation being
thereunto had, may more fully appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Roger Wearn, do hereby declare that the nature of the said Invention is
described as follows, that is to say:
The introducing of fire or flame for the heating of the boilers of steam engines
and the water contained in such boilers by means of an cliptical or arched

page_text: furnauce passing through the middle of such boilers, and at the same time the
reverberating or returning of such fire or flame by means of such cliptical or
arched furnace upon the ores placed at the bottom of such furnaco for tho
purpose of being thereby cleansed or calcined with a smaller quantity of fuel than
is now used for heating the boilers of steam engines. And I do hereby declare
that the manner in which the same is to be done and performed is described
and shown in the Plans or Drawings hereon made and the references thereto
as follows; that is to say, the feeding place or opening through which the fuel
is to be supplied is at A. The fire is made at B. The flame then ascending
passes over the bridge C along the arched roof D, D, D, from whence the
flame is returned or reverberated upon the bottom of the furnace E, E, E,
where the ores to be cleaned or canciled are placed.
the flue F, and ascends the stack or chimney G, G; G. The ores are charged
and worked through the door H. The bottom of the furnace is supported by
the legs I, I, I. The boiler may be cleaned through the door K, and the water
let out at the cock L.
The flame then enters
In witness whereof, I, the said Roger Wearn, have hereunto set my hand
and scal, the Twenty-seventh day of July, in the year of our Lord One
thousand seven hundred and ninety.