Year: 1888

page_text: 1, GEORGE FLETCHER, of Masson Works, Litchurch, in the county of Derby,
Engineer, do hereby declare the nature of this invention (partly a communication
from abroad by George Brocklehurst of the Island of Barbados, Engineer) to be as
follows:-
My invention relates to evaporating pans which are chiefly designed for evaporating
and granulating saccharine liquids, but which are also applicable for the evaporation
of other liquids.
In carrying out my invention I make use of a hollow drum located within the
evaporating pan and having a number of heating tubes and a large central tube
through which the liquid circulates and which offers a large area of heating
surface.
I find it advantageous to make the drum of the full diameter of the pan so that
it forms part of the body thereof and is not removeable. The bottom of the pan is
fitted so that it can be removed when required, and to enable this to be easily done
I prefer to provide it with hinges and catches or their equivalents.
The outlet or discharge valve for the syrup should be of such dimensions as to
allow the cleaning to be effected without rendering it necessary to remove the
bottom of the pan. The steam inlet is made in the side of the pan as also is the
outlet for the steam and condensed water.
By making the drum of the full diameter of the pan 1 am enabled to considerably
increase the size of the central tube and the whole of the circulation in a downward
direction takes place through this tube instead of partly through the central tube
and partly between the sides of the drum and the pan.
Instead of placing the large circulation tube in the centre of the drum I
can, if required, place it on one side, and more than one of such tubes can be
employed.
According to a modification of my invention the dram is made of smaller diameter
than the interior of the pan and is mounted upon combined hollow standards or
nozzles forming the steam inlet and outlet, which standards or nozzles are introduced

page_text: through the bottom of the pan. The drum is secured by means of eye bolts or their
equivalents provided with nuts and washers passed through the drum and through
the said hollow standards or nozzles.
In this modification the pan can with advantage be constructed partly of wood and
partly of iron or entirely of wood, as wood being a good non-conductor allows little
loss of heat through radiation, besides which the pan can in many cases be almost
entirely constructed in the locality where it is intended for use thereby saving con-
siderable expense and trouble in transport. The iron parts of the drums and pans
can, if desired, be galvanized or otherwise treated to protect them from the corrosive
action of the liquids introduced into the pans for treatment.
Dated the 1st day of June 1888.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: Improvements in Evaporating Pans.
I, GEORGE FLETCHER, of Masson Works, Litchurch, in the county of Derby, Engineer,
do hereby declare the nature of this invention (partly a communication from abroad
by George Brocklehurst, of the Island of Barbados, Engineer,) and in what manner
the same is to be performed to be particularly described and ascertained in and by the
following statement :-
My invention relates to open pans which are heated by steam and chiefly designed
for evaporating and granulating saccharine liquids, but which are also applicable for
the evaporation of other liquids.
In order to enable the invention to be fully understood, I will describe how it
can be carried into practice by reference to the accompanying drawing, in which
Figure 1 is a vertical section of an open evaporating pan constructed according
to this invention.
Figure 2 is a plan of figure 1.
Similar letters in both the figures indicate similar parts.
In carrying out my invention, I make use of a hollow drum A located within the
evaporating pan and having a number of heating tubes C, C and a large central tube B
through which the liquid circulates and which offers a large area of heating
surface.
I make the drum A of the full diameter of the pan so that it forms part of the
body thereof and is not removable. The bottom E of the pan is fitted so that it
can be removed when required, and to enable this to be easily done I prefer
to provide it with hinges and catches or their equivalents not shown in the
drawing.
The outlet or discharge valve F for the syrup is of such dimensions as to allow
the cleaning to be effected without rendering it necessary to remove the bottom E of
the pan. The steam inlet G is made in the side of the pan as also is the outlet H
for the steam and condensed water. D is the top or belt of the evaporating
pan.
By making the drum A of the full diameter of the pan, I am enabled to con-
siderably increase the size of the central tube B and the whole of the circulation
in a downward direction takes place through this tube instead of partly through the
central tube and partly between the sides of the drum and the pan as has hitherto
been the case.
The circulation tube B being of large diameter and entirely independent of the
steam and exhaust connections, the full area is free and unobstructed for the passage
of the contents of the pan, so that every inducement is offered for the perfect
circulation of the liquids therein, and consequently the work effected by a given
area of heating surface is proportionately increased and the qualities of the sugar
are improved.

page_text: Instead of placing the large circulation tube B in the centre of the drum I
can, if required, place it on one side, and more than one of such tubes can be
employed.
The iron parts of the drums and pans can, if desired, be galvanized or otherwise
treated to protect them from the corrosive action of the liquids introduced into the
pans for treatinent
:-
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
:-
The improvements in evaporating pans hereinbefore described and illustrated in
the accompanying drawing.
Dated the 27th day of February 1889