CERTAIN ARRANGEMENTS CONNECTED WITH THE CIRCULATION OF STEAM EMPLOYED IN PIPES OR TUBES FOR PRODUCING HEAT, AND THE APPLICATION OF SUCH ARRANGEMENTS TO VARIOUS PURPOSES
Year: 1842

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
BEVAN, of Liverpool, in the County of Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent under the Great Seal of Great Britain, bearing date at Westminster,
the Fifth day of November, in the year of our Lord One thousand eight hun-
dred and forty-two, in the sixth year of Her reign, did give and grant unto me,
the said Richard Bevan, my executors, administrators, and assigns, Her special
licence, full power, sole privilege, and authority, that I, the said Richard
Bevan, my executors, administrators, and assigns, and such others as I, the said
Richard Bevan, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter during
the term of years therein mentioned, should and lawfully might make, use,
exercise, and vend, within that part of the United Kingdom of Great Britain
and Ireland called England, Her Majesty's Dominion of Wales, and Town of
Berwick-upon-Tweed, and also in the islands of Guernsey, Jersey, Alderney,
Sark, and Man, and in all Her Majesty's Colonies Plantations abroad,
my Invention of "CERTAIN ARRANGEMENTS CONNECTED WITH THE CIRCULATION OF
STEAM EMPLOYED IN PIPES OR TUBES FOR PRODUCING HEAT, AND THE APPLICATION
OF SUCH ARRANGEMENTS TO VARIOUS PURPOSES;" in which said Letters Patent
there is contained a proviso, that I, the said Richard Bevan, shall 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, to be inrolled in Her 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, reference being thereunto had, will more fully and
at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Richard Bevan, do hereby declare the nature of my said Invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement (that is to say):-
My Invention consist in certain arrangements of pipes through and in
which stoam is to circulate, and becoming condensed its water returns to the
boiler in which it was generated, the heat of condensation of such steam
having been applied to the purpose of heating and evaporation. The annexed
sketch will shew the means by which this is accomplished. From the upper
part of a closed and high pressure boiler of a circular or any other convenient
shape, and above the water line a, a, a pipe c, c, passes and communicates at
the vessel to be heated, or containing the liquor to be boiled down and evapo-
rated, with a pipe or system of pipes (A, A, A,) of small diameter laid at the
bottom of the vessel, or coiled about in any convenient manner so as to afford a
large extent of surface to the liquid. The pipe or system of small pipes
A, A, A, is laid throughout with a small continuous inclination downwards, so
as to insure the immediate return of the water produced by the condensation
of the steam into the boiler by means of the small pipe B, which reaches
A cock or valve is placed at
nearly to the bottom of the water in the boiler.
D for the purpose of freeing the pipes from atmospheric air by blowing off
steam or water, otherwise the free circulation of the steam and its return to
the boiler after being condensed will be impeded or altogether stopped.
Cocks are placed at F or any other convenient part of the pipe C, and at E in
the return pipe between the boiler and cock D; by either of these the circula-
tion may be stopped at any time, also if F be open and E closed, steam or
water will blow off at D; and if F be closed and E open, water will blow off
at D. The annexed Drawings represent arrangements of pipes which I have
used with great advantage in two cases. The operation of the apparatus will
be as follows:-The system of pipes being filled with steam or steam and
water, the air being removed by blowing off through D, the cold liquor in
contact with the outer surfaces of the system of small pipes A, A, A, will con-
dense the steam, and the heat given out by that condensation will be employed
in heating, boiling down, or evaporating the liquor in the vessel. The water of
the steam so condensed will be return to the boiler through the pipe B; by
this means the steam in the boiler may be kept up at little cost of fire and
labour, and the boiler when once filled will require little further supply of
water beyond the loss occasioned by leakage, which is a great desideratum in
many situations, that which is wasted being supplied by a small force pump
from time to time, as occasion requires. The arrangements herein-before

page_text: described may be applied most advantageously whenever the boiling down or
evaporation is carried on at a low temperature, as in the manufacture of
copperas, the lead vessels usually employed in that and other manufactures
being peculiarly liable to injury from the fire. The saving in the cost of
repairs and of fuel by the adoption of the above-mentioned method of heating
the vessels will be found to be very considerable. I would also observe that
the same arrangements are applicable to the manufacture of salt, alum, &c.,
the boiling or refining of sugar and oil, and indeed to the boiling down,
refining, or evaporating of most liquids; and it is obvious that the Invention
may be applied to pans or vessels of any size or shape, and made of any
suitable material varying the position and number of the pipes, as circum-
stances may require; and I should further observe that the pipes or tubes may
be made of any metal that may be most suitable according to the nature of the
fluid through which they pass.
Having now described the nature of my said Invention, and in what
manner the same may be formed, I would observe that I do not claim as of
my Invention the use of steam or water for heating pans or vessels containing
liquids, steam and water having been employed in various ways for that pur-
pose, but what I claim as of my Invention is, the arrangement of pipes whereby
the circulation of steam leaving the boiler, and of the water of that steam
returning to the boiler, is kept up continuously, the heat of condensation being
employed in heating, boiling down, and evaporating, as above described.
In witness whereof, I have hereunto set my hand and seal, this Second
day of May, in the year of our Lord One thousand eight hundred and