An Improved Method of Boiling Liquids, Applicable to all kinds of Fluid Heating Utensils.
Year: 1889

page_text: Date of Application, 5th Sept., 1889
Complete Specification Left, 20th Sept., 1889--Accepted, 23rd Nov.,
1889
PROVISIONAL SPECIFICATION.
An Improved Method of Boiling Liquids, Applicable to all kinds of
Fluid Heating Utensils.
We, ALFRED JOHN PAYNTER BROWN of 29 Warwick Lane, London, Paper
Merchant, and FRANCIS WOOD COOMBE of 41 Copplestone Road, Peckham, in the
county of Surrey, Commercial Traveller, do hereby declare the nature of this
invention to be as follows:-
This invention refers to kettles and other boiling utensils and is designed to cause
the contents to boil more readily and rapidly.
From
This is effected by inserting in the kettle (or other utensil) a false bottom a short
distance above the real bottom. This false bottom is perforated so that the lowest
stratum of the water is contained in the space between the two bottoms.
one or more holes in the false bottom an open-end tube or tubes project upwards,
inside the kettle to within a short distance from the top of the vessel. The effect
of this arrangement is that when the kettle is placed on the fire a rapid circulation
of the fluid takes place and the entire contents are rapidly raised to boiling point.
Instead of open tubes, perforated tubes closed at top can be used.
1000
S. S. BROMHEAD,
97, Newgate Street, E.C., Patent Agent.
COMPLETE SPECIFICATION.
An Improved Method of Boiling Liquids, Applicable to all kinds of
Fluid Heating Utensils.
We, ALFRED JOHN PAYNTER BROWN 29 Warwick Lane, London, Paper Merchant
and FRANCIS WOOD COOMBE, 41 Copplestone Road, Peckham, county of Surrey,
Commercial Traveller do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention refers to kettles and other utensils employed for boiling liquids, and
is designed to effect the speedy permeation of heat so as to raise the liquid quickly to
boiling point.
This is accomplished by inserting in the utensil, or forming therein during process
of manufacture, a second or inner bottom, a short distance from the first or outer
bottom, which is exposed to the heat of the fire.
The space between the two bottoms will necessarily vary according to the size of
the utensil, but in the case of an ordinary kettle containing 3 or 4 pints will be about
one quarter of an inch in depth.
The upper bottom is perforated with a few holes so as to allow of the gradual
passage of the liquid to the chamber between the two bottoms.
In or near the centre of the upper bottom is placed one or more tubes which
rise to near the top of the kettle, the top of the tubes being slightly above the
level of the fluid when the kettle or utensil is nearly full.
These tubes may be open at top, or may be closed at top, with a few horizontal
holes near the summit, or may be partly covered, as preferred.
The object being to cause a rapid circulation of the water upwards through the
tube or tubes, the size of the openings admitting water to the chamber must be
carefully adjusted to the size of the tube, so that the water will remain in the chamber
a sufficient time to get thoroughly heated before it passes off through the tube.

page_text: I will now refer to the accompanying drawings in which Fig. 1 shews a section of
one of our perforated bottoms, with an open tube attached. Fig. 2. shews another
section with the tube in elevation, and with a hood D at its summit. Fig. 3 shews a
section of a kettle with our apparatus attached, the tube having a cap C. at its upper
end and holes near the top to allow the liquid to pass.
A indicates the perforated inner bottom which when attached to one of the
tubes B, B', or B2, together form our special apparatus. B' is the tube with a
hood D on top which allows the circulation to take place laterally. B² is the tube
surmounted by a cap C, and with perforations near its summit. The arrows shew the
direction of the current. E is the bottom of the kettle or vessel.
The perforated bottom may be flat arched, or coniform, as preferred, and may be
fixed to the utensil or placed loosely therein. The tubes also are susceptible of
many variations in form, and I do not confine myself to any particular pattern,
either of tube or bottom. In the case of the bottom being loose, it may rest on
the sloping sides of the utensil or may have a rim or feet to keep it the required
distance from the outer bottom. Or, if required to be held firmly in place and
yet be easily removable for cleansing, it may be fixed by means of small lugs
placed to receive it, vertical grooves being formed in the nose of the lugs, and
notches corresponding to the lugs being cut in the outer edge of the perforated
bottom so that it may be dropped over the lug to a short distance and then turned
to one side so as to engage with the aforesaid grooves.
Having now particularly described and ascertained the nature of our said Inven-
-tion, and in what manner the same is to be performed, we declare that what we
claim is;
1. In a kettle or other utensil for heating fluids, a perforated plate forming a
second or inner bottom to the vessel, in combination with a tube or tubes rising
therefrom in a vertical or nearly vertical direction, in order to effect a rapid
circulation of the fluid contained in the vessel, as herein explained and set forth.
2. In a vessel for boiling or heating fluids a shallow chamber inside the bottom
of the vessel, the said chamber having holes on its upper surface, and being furnished
with a tube or tubes as herein explained and set forth.
Dated this 20th day of September 1889
S. S. BROMHEAD,
97, Newgate Street, London, Patent Agent.