AN IMPROVEMENT IN THE CONSTRUCTION OF THE FURNACES OF STEAM BOILERS AND OTHER VESSELS, BY WHICH FUEL IS ECONOMIZED AND THE SMOKE CONSUMED
Year: 1823

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JACOB
PERKINS, of Fleet Street, in the City of London, and JOHN MARTINEAU the
younger, of the City Road, in the County of Middlesex, Engineers, send
greeting.
years
WHEREAS His most Excellent Majesty King George the Fourth did, by
His Letters Patent under the Great Seal of that part of the United Kingdom
of Great Britain and Ireland called England, bearing date at Westminster, the
Twentieth day of November, One thousand eight hundred and twenty-three,
in the fourth year of His reign, give and grant unto us, the said Jacob Perkins
and John Martineau, our exors, admors, and assigns, His especial licence, full
power, sole privilege and authority, that we, the said Jacob Perkins and John
Martineau, our exors, adñors, and assigns, during the terin of; therein
mentioned, should and lawfully might make, use, exercise, and vend, within
England, Wales, and the Town of Berwick-upon-Tweed, our Invention of
"AN IMPROVEMENT IN THE CONSTRUCTION OF THE FURNACES OF STEAM BOILERS
AND OTHER VESSELS, BY WHICH FUEL IS ECONOMIZED AND THE SMOKE CONSUMED;"
in which said Letters Patent there is contained a proviso, that if wc, the said
Jacob Perkins and John Martineau, shall not particularly describe and ascer
tain the nature of our said Invention, and in what manner the same is to be
performed, by an instrument in writing under our hands and scals, or under

page_text: the hand and seal of one of us, and cause the same to be inrolled in His
Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said Letters Patent, that then the said
Letters Patent, and all liberties and advantages whatsoever thereby granted,
shall utterly cease, determine, and become void, as in and by the same,
relation being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Jacob Perkins and John Martineau the younger, do hereby declare the
nature of our said Invention to be described in the accompanying Drawing
and following explanation (that is to say):-
We construct and place our furnace on the inside of the steam boiler,
brewing copper, or other vessel, in such a manner that it is entirely surrounded
by the water or other fluid to be heated, and the heat communicated by the
actual contact of the burning fuel against the sides of the furnace instead
of the ordinary modes, whereby the heat is principally communicated by
radiation.
The accompanying Drawing represents a steam engine boiler of the usual
construction externally, but having one furnace adapted to it. A is the furnace
with the fire-bars rising about an inch above the level of the bottom of the
boiler; B, the flue leading off to the chimney; C, a hopper, into which
a sufficient quantity of coals may be placed to last for several hours; D, a
small opening to the furnace, with a door through which the fire may be
cleaned or occasionally stirred; E, the ashpit. The fire will not extend
upwards above the level of the top of the flue, and as the fuel is expended a
fresh quantity will fall down to supply the waste. The smoke, having to pass
through the burning fuel before it reaches the flue, is entirely consumed. The
proportions and form of the furnace may be varied according to the size and
object of the vessel to be heated, and in many cases it will be desirable to place
the furnace in the centre of the vessel, and to lead off with two flues in contrary
directions. In this case the opening for cleaning should be placed at the side.
We do not claim to ourselves the exclusive use of this particular mode
of keeping the fire supplied with fuel, excepting only in conjunction with a
furnace on the principle we have described.
In witness whereof, I, the said John Martineau, have hereunto set my
hand and seal, the Nineteenth day of May, in the year of our
Lord One thousand eight hundred and twenty-four.
JOHN (L.B.) MARTINEAU, Jr.

page_text: AND BE IT REMEMBERED, that on the Nineteenth day of May, in
the year of our Lord 1824, the aforesaid John Martineau the younger
came before our said Lord the King in His Chancery, and acknowledged
the Specification aforesaid, and all and every thing therein contained and
specified, in form above written. And also the Specification aforesaid was
stamped according to the tenor of the Statute made for that purpose.
Inrolled the Nineteenth day of May, in the year of our Lord One
thousand eight hundred and twenty-four.