IMPROVEMENTS IN THE MANUFACTURE OF SUGAR
Year: 1845

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I.
AUGUSTUS WILLIAM GADESDEN, of. Woburn Square, in the County of
Middlesex, Gentleman, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria,
by Her Letters Patent under the Great Seal of Great Britain,
bearing date at Westminster, the Sixteenth day of January, in the
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Augustus. William Gadesden, Her
especial licence, full power, sole privilege and authority, that I, the
said Augustus William Gadesden, my exors, admiors, and assigns, or
such others as I, the said Augustus William Gadesden, my exors.
adors, or assigns, should at any time agree with, and no others,
from time to time and at all times during the term of years therein
expressed, should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick upon Tweed, and
in the Islands of Jersey, Guernsey, Alderney, Sark, and Man, and also
in all Her said Majesty's Colonies and Plantations abroad, my In-
vention of "IMPROVEMENTS IN THE MANUFACTURE OF SUGAR;" in which
said Letters Patent is contained a proviso, that 1, the said Augustus
William Gadesden, shall cause a particular description of the nature
of my, said Invention, and in what manner the same is to be per-

page_text: formed, 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 in and by the same, reference
being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the
said Augustus William Gadesden, do hereby declare that the nature of
my said Invention, and the manner in which the same is to be per-
formed, are fully described and ascertained in and by the following
statement thereof, reference being had to the Drawing hereunto
annexed, and to the figures and letters marked thereon (that is
to say):
My Invention has for its object a mode of effecting the evaporation
of syrups at a low temperature, which I accomplish by the use of
cylinders revolving in such syrups when they are being evaporated,
whereby that process of evaporation is caused to be carried on with
greater advantage than heretofore, the cylinders used being so arranged
that they do not communicate any heat to the syrups; but by simply
revolving, partially immersed in the heated syrup, they carry up the
same in thin layers out of the general body of the liquid contained in
the evaporating vessel. And in order that the Invention may be most
fully understood and readily carried into effect I will proceed to describe
the means pursued by me.
DESCRIPTION OF THE DRAWING.
Figure 1 represents a transverse section of the description of evapo-
rating vessel which I prefer, and the shape of the evaporating vessel a
, may be varied without departing from my Invention. Figure 2 is
a side view of the evaporating vessel a. In the vessel a is placed a
cylinder b, the axis c of which turns in bearings at d, d, as is shown.
and a slow rotatory motion is communicated to the axis and cylinder
, so that part of the cylinder, will at all times be immersed in the
syrup, as is shewn, and by revolving therein will have the surface or
: surfaces thereof coated with a thin film of the heated syrup, and by so
doing the aqueous part will go off' more freely, and thus will the process
of evaporation be improved. The best means of constructing cylinders
C,

page_text: for such purpose that I am acquainted with is by forming the outer
circumference of each by means of a series of bars fixed to frames, as
shewn in the Drawing; and for making the cylinder as light as possible
I prefer that the bars should be tubes closed at their ends; by this
means a cylinder is formed with an undulating surface, which 1 find
beneficial; at the same time I would remark, that a plain surface may
be used to the cylinder, and although a cylindrical vessel is best it will
be evident that the object to be accomplished is an extended revolving
surface in the fluid, and therefore a conical or other figured surface
might be used. In some cases where it is desired to remove the steam
from the apartment which contains the evaporating vessels, a cover of
wood or other material may be used to cover each of the pans or
evaporating vessels, and also the revolving cylinders, with a pipe
leading to a chimney or other outlet, care being taken to maintain
such a draft as will cause the heated vapours to be quickly removed
from such evaporating vessels.
In witness whereof, I, the said Augustus William Gadesden, have
hereunto set my hand and seal, this Sixteenth day of July, in
the year of our Lord One thousand eight hundred and forty-