Solutions or Liquids liable to Boil over.
Year: 1884

page_text: '
Solutions or Liquids liable to Boil over.
"
I, JOHN SUNDSTROM, of 107, Abbotts Road, Bromley-by-Bow, in the county of
Middlesex, Engineer, do hereby declare the nature of my invention for "IMPROVE.
MENTS IN PANS FOR EVAPORATING CANE-JUICE AND LIKE SOLUTIONS OR LIQUIDS
LIABLE TO BOIL OVER," to be as follows:-
In ordinary open or vacuum pans for evaporating cane or like saccharine juice, or
other solutions or liquids, the same is liable at any moment to boil over, causing
serious waste, annoyance and expense and loss of time.
My invention is designed to provide a pan in which, when the level of the juice
or liquid is raised by the heat it is circulated through the pan in place of boiling
over the same.
In carrying out my invention, say as for an "open" pan, I arrange a plate or
disc supported at some distance above the bottom of the pan by bearers, lugs, or
otherwise, the said disc being of lesser diameter than that of the pan.
Above this a corresponding disc is placed, the whole boing united by a flanged.
ring, so forming a hollow drum.
•
Open-ended tubes pass through this drum, in number and diameter depending on
the capacity of the pan.
But so far this arrangement is well known.
At the centre or other part of the pan I according to my invention arrange a
tube (or tubes) projecting through the hollow drum in an upward direction.
In working the pan steam is admitted to the drum which heats the juice, the
same naturally circulating through the small tubes passing through the drum, but
when the level of the liquid rises in danger of boiling over the foam is broken by
striking the projecting tube (or tubes), which permits of the escape of steam and
air and allows the liquid to run down the same to the bottom of the pan again,
and so on while the pan is being worked till the required moisture is eliminated.
For a vacuum pan I arrange my circulating tube or tubes in a telescopic form
and adapt the same to be raised and lowered by a worm and wheel, rack and
pinion, chain, or other device operated by a shaft or other gearing passing through
a stuffing-box in the pan.

page_text: Improvements in Pans for Evaporating Cane-juice and like
Solutions or Liquids liable to Boil over.
I JOHN SUNDSTROM of 107 Abbotts Road Bromley-by-Bow in the county of
Middlesex Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN PANS FOR EVAPORATING CANE-JUICE AND LIKE SOLUTIONS OR LIQUIDS
LIABLE TO BOIL OVER and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
"
In ordinary open or vacuum pans used for evaporating cane or like saccharine
juice or other solutions or liquids, the same is liable at any moment to boil over
causing serious waste, annoyance, expense, and loss of time.
My invention is designed to provide a pan or adapt an arrangement thereto in
which, when the level of the liquid is raised by the heat, it is circulated through
the pan in place of boiling over the same.
And in order that my said invention may be understood and carried into
practical effect I have caused to be annexed to this specification the accompanying
sheet of drawings and now refer to the figures and letters of reference marked
thereon.
Fig. 1 is a vertical section of a pan for boiling saccharine or like solutions, fitted
with my invention.
Fig. 2 a plan of same taken in section on line u-b.
Fig. 3 an isometrical view of an obvious modification of my invention.
A is a pan constructed in any suitable manner. Within this pan I place a device
for heating the contents of the same. I have shewn the pan provided with a plate
or disc B supported at some distance above the bottom of the pan by angle irons,
bearers, lugs or otherwise, the said plate or disc being of lesser diameter than the
pan. Above this I place a corresponding plate or disc C, the whole being united by
a flanged ring D so forming a hollow drum.
Open ended tubes E pass through this drum in number and diameter depending
on the capacity of the pan. An inlet for steam F and a suitable outlet for the
escape of steam and water at the top or bottom of the pan (as shown at the top G)
is provided.
So far this arrangement is well known. Steam admitted through F passes to the
interior of the drum and heats the same, and the saccharine or other heated liquid
flows through the tubes E so maintaining a constant circulation.
A steam heated worm or heated external casing to the pan might be substituted
for the drum but I prefer the latter.
Referring to the said drum I provide a tube or tubes H passing through the
same, or if a worm is used through the worm, and having another telescopic part
or parts I, which upper section is advantageously made with a conical or flaring
mouth J.
I provide means for elevating and maintaining my tube in position in accordance
with the level of liquid in the pan.
Various well-known mechanical devices such as worm and worm wheel, rack

page_text: standard or link pivoted to the tube at L and at M to a lever N pivoted at O to a
bracket, and provided with a slot at P to enable a pin Q passing through this slot
to enter any one of a series of holes made in a bracket R so as to pin or support
this lever N S is a thermometer.
It will be readily perceived that if the boiling liquid be in danger of abnormal
ebullition, the foam will be broken by the edge J of my tube and the steam and
air be permitted to escape allowing the liquid to run down the said tube to the
pan bottom, and so on while the pan is being worked, till the required moisture is
eliminated, or the liquid attains the desired consistency or nature required..
The arrows shew this circulation.
Also tubes of other sections than round could be used.
For instance, to form a rectangular tube say for use in a square pan as in Fig. 3,
I may place partitions T T³, to form the sides of my tubes which butt on the pan
sides U U and so form a rectangular "tube" or compartment and use a square
steam drum V, divided into two parts. Pipes W. W₁ allow the steam to escape
from one drum to the other and steam inlets and outlets respectively F¹ G³ are
provided as above.
The partitions T T are arranged to be telescopic like H, I and may be provided
with the flaring mouths J' like the round tubes.
The partitions T T of course fit closely to the sides of the pan U U¹ so as to
prevent an escape of liquid to the so formed tube excepting of course over the top
of the same.
I might so divide a round pan with this form of tube, or might subdivide my
tubes if desired or use a plain and not a conical or flaring mouth.
The pans as shewn are of the open variety but my invention is equally applicable
to the closed pan and "triple effet" pan or plant.
Other liquids besides saccharine (whether cane, beet or the like) can be boiled in
pans fitted with my arrangement as for instance saponaceous solutions or chemical
solutions, the pans being constructed of suitable materials for the purpose.
My invention is also applicable for use in brewing pans or
the like.
"
coppers" and
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
Making the said tube, tubes or compartment telescopic substantially as and for
the purposes described.