IMPROVEMENTS IN THE CONSTRUCTION OF EVAPORATING APPARATUS
Year: 1870

page_text: LETTERS PATENT to Charles Henry Moberly, of Erith, in the County
´ of Kent, Engineer, for the Invention of "IMPROVEMENTS IN THE
CONSTRUCTION OF EVAPORATING APPARATUS."
Sealed the 28th February 1871; and dated the 21st October 1870.
PROVISIONAL SPECIFICATION left by the said Charles Henry Moberly
at the Office of the Commissioners of Patents, with his Petition,
on the 21st October 1870.
I, CHARLES HENRY MOBERLY, of Erith, in the County of Kent,
Engineer, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN THE CONSTRUCTION OF EVAPORATING APPARATUS," to be as
follows:-
The chief object of this Invention is to enlarge the heating surface
and thereby increase the efficiency of apparatus used for heating and
evaporating liquids without enlarging the dimensions of the apparatus.
.
My Invention applies chieffy to the concentration by evaporation of
saccharine liquors, but it may be employed also in the heating of water
for hot water apparatus and for the generation of steam..

page_text: To illustrate the Invention I will describe it as applied to the
concentration of saccharine liquors. I take, say, for example, the evapo-
rating apparatus patented by. Walter Knaggs, dated 3rd January 1867,
No. 22, and instead of using his transverse tubes which overlie the
tray bottom, and receive steam from the steam boiler below, which steam
transmits to the liquor to be concentrated the heat derived from the
furnace below the boiler, I fit into the tray bottom vertical hollow pro-
jections set equidistant from each other and extending over the bottom
of the tray. These projections I make of any desired size, say 2 inches
diameter and 5 inches high, and I form them by preference of a thimble
shape, and I furnish them with screw threads at their edges to fit into
tapped holes in the tray bottom. The projections thus fitted will form
part of the steam space of the boiler, and any condensation of the steam
that may occur will fall immediately into the water below, thus leaving
the steam free to act on the entire internal surface of the projections.
The saccharine liquor contained in the tray will thus be exposed to a
large heating surface which will have a uniform heat throughout. These
hollow projections besides imparting heat to the saccharine liquor by
contact therewith will serve as guides for the bubbles of steam generated
at the bottom of the saccharine liquor, and will facilitate their escape
at the surface of the liquor. This arrangement will materially simplify
the construction of the evaporating apparatus besides increasing its
efficiency.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Henry Moberly in the Great Seal Patent
Office on the 21st April 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
HENRY MOBERLY, of Erith, in the County of Kent, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of October, in the
year of our Lord One thousand eight hundred and seventy, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Charles Henry Moberly, Her
special licence that I, the said Charles Henry Moberly, my executors,

page_text: administrators, and assigns, or such others as I, the said Charles Heury.
Moberly, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 THE CONSTRUCTION OF EVAPORATING APPARATUS,"' upon
the condition (amongst others) that I, the said Charles Henry Moberly,..
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 Charles Henry Moberly, 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, reference being had to the Drawing here-
unto annexed, and to the letters and figures marked thereon (that is
to say):
The chief object of this Invention is to enlarge the heating surface
and thereby increase the efficiency of apparatus used for heating and
evaporating liquids without enlarging the dimensions of the apparatus.
My Invention applies chiefly to the concentration by evaporation of
saccharine liquors, but it may be employed also in the heating of water
for hot water apparatus and for the generation of steam.
To illustrate the Invention I will describe it as applied to the
concentration of saccharine liquors. I take, say for example, the well
known and approved evaporating apparatus patented by Walter Knaggs,.
dated Third January One thousand eight hundred and sixty-seven,
No. 22, and instead of using his transverse tubes which overlie the
tray or bottom of the evaporating vessel and receive steam from the
steam boiler below (by which steam transmits to the liquor to be con-
centrated the heat derived from the furnace below the boiler) I fit into.
the tray bottom vertical hollow projections set equidistant from each
other and forming groups which extend over the bottom of the tray.

page_text: in the accompanying Drawing Fig. 1 is a transverse section shewing
so much of the improved Knaggs' evaporating apparatus as will serve to
explain my Invention; Fig. 2 is a longitudinal section of the same, the
middle portion being broken away; and Fig. 3 is a plan view of the
same taken at two different levels, one half being taken in the line 1, 2,
of Fig. I., and the other half in the line 3, 4, of the same Figure.
In these Figures A represents a closed evaporating vessel intended to
evaporate under vacuum. Below this vessel a steam boiler B is formed
co-extensive with its whole area. This steam boiler forms the top of
the furnace, on the walls of which the evaporating apparatus is mounted.
C, C, are tubes pendent from the bottom of the boiler and in com-
munication therewith, and serving to increase the surface exposed to
the action of the fire by which the boiler is heated. D, D, are the
hollow projections set in the bottom or tray A' of the evaporating vessel.
The liquor to be operated upon is admitted to the vessel A by the pipes E,
and that portion which is not evaporated is run off by the pipes F. The
projections D, D, I make of any desired size, say two inches diameter and
five inches high, more or less, and I form them by preference of a thimble
shape, as shewn best in the enlarged view Fig. 4. These hollow pro-
jections I furnish with a screw thread at their edges, and I fit them into
tapped holes in the tray bottom. When thus fitted the projections will
form part of the steam space of the boiler B; any condensation, there-
fore, of the steam that may occur will fall immediately into the water
below, thus leaving the steam free to act on the entire internal surface
of the projections. The saccharine or other liquor contained in the
evaporating vessel A will thus be exposed to a large heating surface
which will have a uniform heat throughout. These hollow projections,
besides imparting heat to the saccharine or other liquor under treatment,
will serve by reason of their being in contact therewith as guides for
conducting upwards the bubbles of steam as soon as they are generated
at the bottom of the liquor, and will by facilitating their escape at
the surface of liquor increase the evaporating power of the apparatus.
This arrangement, as will be readily understood on comparing my im-
proved evaporating apparatus with that above referred to, will, besides
increasing its efficiency, materially simplify the construction of the
apparatus.
'

page_text: the Construction of Evaporating Apparatus," and explained the manner
of carrying the same into effect, I wish it to be understood that under
the above, in part recited Letters Patent I claim, increasing the heating
surface of evaporating apparatus in the manner and for the purpose above
set forth.
In witness whereof, I, the said Charles Henry Moberly, have
hereunto set my hand and seal, the Twentieth day of April,
in the year of our Lord One thousand eight hundred and seventy-
one.
C. H. MOBERLY. (L.S.)