IMPROVEMENTS IN EVAPO- RATING, AND IN APPARATUS FOR THE SAME, ESPECIALLY APPLICABLE TO THE EVAPORATION OF SUGAR
Year: 1859

page_text: LETTERS PATENT to John Aspinall, of Charing Cross, in the County of
Middlesex, Engineer, for the Invention of "IMPROVEMENTS IN EVAPO-
RATING, AND IN APPARATUS FOR THE SAME, ESPECIALLY APPLICABLE TO THE
EVAPORATION OF SUGAR."
Sealed the 25th January 1860, and dated the 28th July 1859.
PROVISIONAL SPECIFICATION left by the said John Aspinall at the
Office of the Commissioners of Patents, with his Petition, on the
28th July 1859.
I, JOHN ASPINALL, of Charing Cross, in the County of Middlesex, Engineer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
EVAPORATING, AND IN APPARATUS FOR THE SAME, ESPECIALLY APPLICABLE TO THE
EVAPORATION OF SUGAR," to be as follows:-
My Invention consists, first, in evaporating substances by means of pipes,
through which steam, hot air, or other heating material is passed, such pipes
being situated at or near the surface of the substances to be evaporated, or
in other words, such pipes being wholly or partially (by preference wholly)
immersed in the substances, but not allowed to reach the bottom of the
samc.
My Invention consists, secondly, in constructing apparatus for evaporating
with movable steam pipes, hot air pipes, or other pipes so arranged that they,
the said pipes, may be caused to rise and fall as may be required, according to

page_text: changes of level in the substances evaporated, in order that the said pipes may
be kept always at or near the surface of the said substances.
These improvements are especially applicable to the evaporation of sugar,
but I propose to apply them to the evaporation of other substances.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Johu Aspinall in the Great Seal Patent Office on the 28th
January 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ASPINALL, of Charing Cross, in the County of Middlesex, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of July, in the year of our Lord One
thousand eight hundred and fifty-nine, in the twenty-third year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John Aspinall, Her special licence that I, the said John Aspinall, my execu-
tors, administrators, and assigns, or such others as I, the said John Aspinall,
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
therein expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN EVAPORATING,
AND IN APPARATUS FOR THE SAME, ESPECIALLY APPLICABLE TO THE EVAPORATION OF
SUGAR," upon the condition (amongst others) that I, the said John Aspinall,
my executors or,administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE. that I, the said John Aspinall, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the Drawings hereunto annexed,
that is to say :-
My Invention consists, first, in evaporating substances by means of pipes,

page_text: through which steam, hot air, or other heating material is passed, such pipes
being situated at or near the surface of the substances to be evaporated, or in
other words, such pipes being wholly or partially (by preference wholly)
immersed in the substances, but not allowed to reach the bottom of the
same.
My Invention consists, secondly, in constructing apparatus for evaporating
with movable steam pipes, hot air pipes, or other pipes so arranged that they,
the said pipes, may be caused to rise and fall as may be required, according to
changes of level in the substances evaporated, in order that the said pipes may
be kept always at or near the surface of the said substances.
These improvements are especially applicable to the evaporation of sugar,
but I propose to apply them to the evaporation of other substances.
Figure 1 of the accompanying Drawings is a side elevation of an apparatus
constructed according to my Invention, showing the evaporating pan in
section; Figure 2 is a plan of the box or case, through which the substances
to be evaporated pass, and through which steam, hot air, or other heating
material circulates. A is a box or case placed by preference near the top of
the evaporating pan, and either fixed to it or free to move up and down.
This box contains vertical pipes a, a, open at both ends. Steam is admitted
to the box by a pipe B, which is led from a boiler C below the level of the
evaporating pan. The steam becoines condensed as it circulates round the
pipes a, a, and passes off in water through a pipe D to the boiler, which pipe
must be connected to the boiler below the water level; by this means a constant
supply of water to the boiler is maintained. The substances to be evaporated
are placed in the pan E, covering the top of the box or case where the
moisture becomes extracted from them by the steam which circulates round
the pipes. The substances are drawn off at the bottom through an outlet F,
provided with a suitable valve or valves not shown in the Drawing. G is a
jacket round the pan, which can be filled with hot or cold water, according as
it may be required to increase or reduce the temperature in the evaporating
pan. Instead of the vertical pipes, I sometimes make use of a coil of pipes,
through which steam circulates, and over and between which the substances
to be evaporated pass.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I do not limit myself to
the employment of vertical pipes or of a coil of pipes, neither do I confine myself
to passing the substances to be evaporated through pipes; but what I claim
is, the evaporating of substances by surrounding them with steam, hot air, or

page_text: other heating material in such manner that the moisture is extracted from the
substances at or near the surface of the evaporating pan.
In witness whereof, I, the said John Aspinall, have hereunto set my
hand and seal, this Twenty-seventh day of January, One thousand
eight hundred and sixty.
JOHN ASPINALL. (L.8.)