Ax IMPROVED BOILER FOR STEAM ENGINES AND OTHER PURPOSES
Year: 1823

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
FURNIVAL, of Droitwich, in the County of Worcester, Salt Manufacturer, send
greeting.
WHEREAS His present most Excellent Majesty King George the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date at
Westminster, the Ninth day of December, in the fourth year of His reign,
did for Himself, His heirs and successors, give and grant unto me, the said
William Furnival, and to Alexander Smith, of Glasgow, Master Mariner, Jis
especial licence, that we, the said William Furnival and Alexander Smith, our
exors, adñiors, and assigns, or such others as we, the said William Furnival
and Alexander Smith, our exors, adñiors, and assigns, should at any time
agree with, and no others, from time to time and at all times during the
term of years therein expresssed, should and lawfully might make, use,
exercise, and vend, within England, Wales, and the Town of Berwick-upon-
Tweed, our Invention of "Ax IMPROVED BOILER FOR STEAM ENGINES AND OTHER
PURPOSES;" in which said Letters Patent there is contained a proviso obliging
us, the said William Furnival and Alexander Smith, or one of us, by an
instrument in writing under our hands and seals, or under the hand and seal
of one of us, particularly to describe and ascertain the nature of our said Inven-
tion, and in what manner the same is to be performed, and to 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 in part recited Letters
Patent, as in and by the same, reference being thereunto had, will more fully
and at large apnear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
William Furnival, do hereby declare the nature of our said Invention to consist
in a certain apparatus to be added to the steam boiler invented by one James
Smith, of Droitwich, in the County of Worcester. Civil Engineer, for which he
has obtained His Majesty's Letters Patent, dated the Nineteenth day of June,
One thousand eight hundred and twenty-three, and particularly described in his
Specification of the same, inrolled in His Majesty's High Court of Chancery the
Seventeenth day of December, One thousand eight hundred and twenty-three,
and which said apparatus when so added to the said steam boiler as aforesaid,
constitutes a steam engine boiler, or steam generator, since steam is generated
by means thereof, applicable to the working of steam engines. Whereas
the steam boiler invented by the said James Smith as aforesaid only gene-
rates steam for the purpose of applying heat, and is not applicable to steam
engine boilers. And in further compliance with the said proviso, I, the said
William Furnival, do hereby describe the manner in which I perform our said
Invention by the following description thereof, reference being had to the
Drawings annexed (that is to say) :-
DESCRIPTION OF THE DRAWING.
The parts marked A, B, C, F, e, S, g, and V, constitute the steam boiler of
the said James Smith, and are described in his Specification of the same, as
follows, that is to say:-A is described to be the said steam boiler, having a flat
top or upper surface C, and in order to give the required strength to a boiler
of this shape, the top and bottom of the same are described to be tied together
by bolts, as shewn in the Drawing hereunto annexed. The fire is described
to be applied to the bottom of this boiler B in any of the ordinary ways now
in use. When the said apparatus invented by the said James Smith is to be set
to work, water is described to be introduced into the boiler by means of the
funnel and feed pipe F, to the depth of about two inches. 9 is described to
be a guage cock, by which to ascertain when the water attains. that depth.
S is described to be a cock for the purpose of drawing off the water again when s
occasion shall require, and e is described to be a cock for giving vent to the.
rarified air when necessary. V is described to be a safety valve.
Having now described those parts which constitute that part of the said
James Smith's Invention which he calls his steam boiler, and to which we do not
claim any right or privilege whatsoever, but which it was necessary to describe :
in order to elucidate our own Invention, I shall now proceed to describe the
apparatus which we have added to the said steam boiler, in order to constitute a
steam engine boiler or generator. D is a second chamber or reservoir, tied

page_text: together by bolts in like manner as the steam boiler herein-before described,
and placed over the chamber A, B, C; in fact the top C of the chamber A, B, C,
forms the bottom of the chamber D. A safety valve W is introduced into the
upper chamber, and R, R, are two steam pipes leading from the upper chamber
to any machinery which it may be required to put in motion by its force. A, A,
are two guage cocks. It will be seen by this addition to that part of the said
James Smith's Invention, which he calls the steam boiler, that if about two
inches of water be introduced into the chamber A, B, C, through the funnel F,
and the fire under it be lighted, steam will rise to the bottom of the chamber
above, which, being half filled with cold water by means of the pump O, will
condense it at once, and cause it to fall down again in the form of water, so
that the water in the lower chamber will seldom need replenishing, while it
will heat the water above sufficiently to generate steam for the purpose of
giving motion to engines and other machinery; and this is effected mainly by the
vast extent of equally heated surface which is thus obtained, the lower chamber
acting in this case as the heating medium, and the upper chamber as the steam
engine boiler or steam generator. And in further reference to our said super-
added apparatus, I hereby declare that part of our said Invention doth consist
in forming the same in compartments, as represented in Figure 2 of the
Drawing, as herein-after described, that is to say: H, H, are a series of trans-
verse partitions, fastened by rivetting or otherwise to the top of the under
chamber and to the top of the upper chamber, which said partitions thus
rivetted serve to strengthen and support the upper chamber, instead of and in
like manner as the bolts herein-before described. In these partitions and
perforated holes, to allow the steam to pass freely from one chamber to another
when required, but these holes I do not claim as part of our Invention, which, as
regards Figure 2, we confine to the supporting and strengthening such a super-
added apparatus as aforesaid by means of the divisions or partitions aforesaid.
No plan is giving in the Drawing, because it is obvious from the nature of the
Invention that the plan might be a perfect square or oblong square, or in fact
any irregular figure. We prefer the shape to be an oblong square, a longitu-
dinal section of which is intended to be represented in the Drawing, Figure 1.
Now whereas we do not claim any right or priviledge whatsoever to that part
of the said James Smith's Invention which he calls a steam boiler, though I
have been obliged to describe the same and afterwards to explain its action
upon our said Invention of a superadded apparatus, which action is necessarily
he same as its action upon the evaporating pans, of which the said James
Smith's steam boiler constitutes a part, but such a superadded apparatus as
foresaid, for the purpose of generating steam applicable to the working of

page_text: steam engines, being to the best of my knowledge and belief entirely new and
never before used in these kingdoms, I do hereby declare this to be our
Specification of the same, and that I do verily believe this our said Specification
doth comply in all respects, fully and without reserve or disguise, with the pro-
viso in the said herein-before in part recited Letters Patent granted to me the
said William Furnival and the said Alexander Smith contained, wherefore we
claim hereby to maintain exclusive right and privilege to our said Invention.
In witness whereof, I, the said William Furnival, have hereunto set
my hand and seal, this Ninth day of June, in the year of our Lord One
thousand eight hundred and twenty-four.