IMPROVEMENTS IN THE MODE OF HEATING, BOILING, OR EVAPORATING BY STEAM OF FLUIDS IN PANS, BOILERS, OR OTHER VESSELS
Year: 1823

page_text: PERKINS' SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JACOB
PERKINS, of Fleet Street, in the City of London, Engineer, send greeting.
WHEREAS His most Excellent Majesty King George the Fourth did, by
His Letters Patent under the Great Seal of His United Kingdom, bearing
date at Westminster, the Seventeenth day of May, 1828, in the fourth year
of His reign, give and grant unto me, the said Jacob Perkins, my exors,
admiors, and assigns, His especial licence, full power, sole privilege and
authority, that I, the said Jacob Perkins, my exors, admors, and assigns,
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 Majesty's Colonies and Plantations
abroad, my Invention of "IMPROVEMENTS IN THE MODE OF HEATING, BOILING,
OR EVAPORATING BY STEAM OF FLUIDS IN PANS, BOILERS, OR OTHER VESSELS;" in
which said Letters Patent there is contained a proviso that if I, the said Jacob
Perkins, shall not particularly describe and ascertain the nature of my said
Invention, and in what manner the same is to be performed, by an instrument
in writing under my hand and seal, 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, I, the said
Jacob Perkins, do hereby declare the nature of my said Invention by the
following statement thereof, that is to say:-
Whereas I, the said Jacob Perkins, have heretofore obtained His present
Majesty's Letters Patent under the Great Seal of Great Britain, bearing date

page_text: at Westminster, the Tenth day of December, in the third year of His reign,
for Certain Improvements in Steam Engines; and whereas a Specification of
the said Patent was inrolled on the Tenth day of June, 1828, in the proper
office for that purpose; and whereas the said Specification did contain a
description of a generator, such as is herein-after alluded to; Now the nature
of my said Invention doth consist in pipes, hollow cylinders, or other the like
apparatus projected from such generator as aforesaid into fluids, which appa-
ratus is to be filled with steam from such generator as aforesaid for the
purposes of heating, boiling, or evaporating the said fluids in pans, boilers,
or other the like vessels, and which apparatus is to be so arranged with valves
and a forcing pump as to return the water produced by the condensation of
the said steam into such generator as aforesaid, and which apparatus-is-to be
so arranged also that the said steam and water is always under mecha-
nical pressure; and in further pursuance of the said proviso, I do hereby
describe a manner in which my said Invention may be performed by the
following description thereof, reference being had to the Drawings and Figures
annexed, that is to say:-
DESCRIPTION OF THE DRAWING.
Figure 1 is a sectional elevation of an apparatus on the principles of my
said Invention. A, the generator described in the Specification of my s said.
Patent for Certain Improvements in Steam Engines; B is a forcing pump';
C, C, C, is a pipe or hollow cylinder opening to and projected from the upper
part of the generator at D, and opening to and projected from the lower part
of it opposite the part marked E, which will be more clearly shewn when
describing the next Figure. F is a pipe leading from the pipe C to the
forcing pump; G is a valve; and II is a boiler, pan or other vessel supposed
to contain fluid. In this application of the generator, J acts only as a
safety valve.
Figure 2 is a plan of the apparatus described in Figure 1, and shews more
clearly the particular process that is effected by it. The parts in this Figure
which are similar to those in Figure 1 are marked with the same letters.
K is a valve not shewn in Figure 1, and L is the particular part of the
generator at which the end of the pipe C, herein-before described as being
opposite the part marked E, opens into the generator. It will be seen by
this arrangement, that steam being received into the pipe C from the
generator at D, it passes into that part of the pipe which is projected into
the vessel H, containing the fluid to be heated; there the steam becomes
condensed, and collects in the form of water at the neck of the valve G;
when the handle of the forcing pump is raised the valve G opens, and the

page_text: water fills the remainder of the pipe C and the pipe marked F, the valve
K. remaining shut; when the handle of the forcing pump is pressed down,
the valve G shuts, and the water being thus prevented from returning
into that part of the pipe C which is in the fluid, forces open the valve K,
and finds its way into the generator again at L.
Now whereas the exact dimensions and proportions of my said Invention
are not material, but those represented in the Drawing annexed are what
I consider the best, as far as regards the parts immediately connected with
the generator, for those parts which are introduced into the fluids which aro
to be heated by them must be varied both in size and shape according to
the various situations in which they are to be applied. And whereas
I have herein described a generator for the purpose of elucidating, but
which forms no part of, my present Invention, but such an apparatus as
herein-before described for heating, boiling, or evaporating by steam fluids
in pans, boilers, or other vessels, which said apparatus doth consist, as for
as I claim any novelty therein, of pipes, valves, and a forcing pump arranged
as aforesaid, being, to the best of my knowledge and belief, entirely new,
and never before practised in these Kingdoms, I do hereby declare this
to be my Specification of the same, and that I do verily believe this said
Specification in all respects fully and without reserve or disguise, doth comply
with the proviso in the said herein-before in part recited Letters Patent
of the Seventeenth day of May contained. And, lastly, I do hereby claim
to maintain an exclusive right and privilege to my said Invention.
In witness whereof, I, the said Jacob Perkins, have hereunto set my
hand and seal, this Seventeenth day of May, in the year of our Lord
One thousand eight hundred and twenty-three.
JACOB (L.s.) PERKINS.
AND BE IT REMEMBERED, that on the Seventeenth day of November,