Improvements in Kettles.
Year: 1889

page_text: Date of Application, 4th June, 1889
Complete Specification Left, 19th Aug., 1889-Accepted. 21st Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Kettles.
ARTHUR CHARLES NUNN (Engineer) 12 Albert Street Lowestoft in the County of
Suffolk do hereby declare the nature of this invention to be as follows:-
My Invention consists of an Improved Rapid heating and Safety Tea Kettle, which
possesses an advantage of heating very rapidly, without any danger of the water
issueing from either the spout or lid, when the Kettle boils; thus ensuring greater
Safety combined with rapidity.
"
"
"
For this purpose I use a small " Boiler Coil
or
of any kind with one, two or
"Boiler" to cause a circulation
more pipes attached thereto, or anything serving as a
of water through a Tea Kettle for the purpose above described. This "Boiler" or
"Coil" can be fixed under the bottom, or around the sides of the said Kettle.
Also the pipes can be fixed either inside or outside of the said Boiler or Kettle, or
the whole appliance can be made as part of the Kettle.
I can also make them in Kettles of all shapes and kinds, and of any suitable
metal.
The appliance is perfectly safe, the steam having free exit from the lid, and is used
exactly as an ordinary Household Tea Kettle.
T1000
COMPLETE SPECIFICATION.
Improvements in Kettles.
1, ARTHUR CHARLES NUNN, Engineer, 12 Albert Street, Lowestoft in the County
of Suffolk, 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:-
My invention consists of an improved rapid heating and safety tea kettle, which
possesses the advantage of heating very rapidly without danger of the water issuing
from either the spout or lid when the kettle boils, thus ensuring greater safety com-
coil" of any kind
bined with rapidity. For this purpose I use a small "boiler" or
with one, two or more pipes attached thereto, or anything serving as a boiler for
causing a circulation of water through a tea kettle for the purpose above described.
This boiler or coil can be fixed under the bottom or around the sides either inside or
outside the said kettle.
In figure 1 of the accompanying drawings I have represented in side elevation one
of my improved kettles in which the "boiler" is in the form of a cylindrical annular
vessel and of which Fig. 2 shows a vertical section Figs. 3 and 4 being horizontal
sections of the same taken respectively on the lines y-z of Fig. 1 and -x of Fig. 2;
Fig. 5 is a vertical section of a kettle with the boiler" formed within the shell
thereof; Fig. 6 is a vertical section and Fig. 7 a horizontal section on the line u-v
of Fig. 6 of a "kettle" in which the "boiler" is in the form of a spiral coil; Fig. 8
is a vertical section on the crooked line s--t of Fig. 9 which is a horizontal section on
the line qr of Fig. 8 of a kettle in which the "boiler" is in the form of two
parallel curved tubes.
.
Like letters indicate like parts throughout the drawings.
Referring to the drawings in general A is the kettle-body B the spout C the handle
all of which parts are of ordinary construction. D is the "boiler" which in Figs. 1
to 4 is constructed of inner and outer cylindrical casings d d' united at their upper
edges by an annular plate & and at their lower edges by a similar plate d³. The

page_text: external diameter of the "boiler" D is such as will admit of its being introduced
through a pot hole in a hot-plate directly into the fire beneath after the manner of
ordinary well-kettles but in this arrangement the flames can play around almost the
entire surface of the part within the fire as well as upon the bottom of the kettle
proper as indicated by the arrows k in Fig. 2, whereas in the ordinary well-kettles only
a comparatively small extent of surface can be directly acted upon by the fire.
D
The bottom a of the kettle is pierced in two places a' and a to the former of which
is soldered or otherwise connected a pipe E which passes through and is soldered or
otherwise suitably connected to the plate d² and extends downwards and terminates
near the plate d³ and serves as the "return" pipe of the boiler; through the other
aperture a² passes the pipe E, the "flow" of the boiler, which is suitably secured in
such aperture to prevent the escape of water at that part. The lower end of the pipe E¹
is soldered or otherwise suitably fastened to the plate d² through which an opening
formed so that the said pipe may form a free communication between the "boiler
and the kettle proper to the upper part of which the pipe E' extends. d are two
legs or distance pieces suitably secured between the plates a and d² to maintain them
at the proper distance apart at the places where they are provided, these legs are con-
veniently of pipe section but have no connection with the interior of either the
kettle A or "boiler" D. F is a screen or guard plate secured around the back part
of the opening into which fits the lid G. This lid is formed preferably of two
parts g and g the part 9 of which fits tightly into the kettle opening as does an
ordinary kettle-lid but is also formed with an opening g² over and at a suitable
distance from which the part g¹ is supported by legs g Fig. 1 or the like in such
manner that a clear space is left between the two parts for the free escape of steam.
The plate a may be provided with feet h as in Fig. 5 if desired; they are not shown
in Figs. 1 and 2 because this kettle is intended to sit flat on the hot plate.
In the kettle represented in Fig. 5 the "boiler" D is immediately below the plate a
which is perforated in two places for the connection of the two pipes E "return" and
El "flow" which as in the preceding example extend one to near the bottom d³ of the
"boiler" D and the other to the upper part of the kettle proper and are connected to
the plate a in a manner similar to that before explained with reference to the said
preceding example. The kettle shown at Fig. 5 is provided with feet h and is not
constructed as a well-kettle but it is obvious that the lower or boiler part may be made
of diameter smaller than that of the upper part so that the said boiler may be passed
through an opening in the hot plate and into the fire beneath as previously
explained.
The "boiler" D applied to the kettle shown in Fig. 6 is in the form of a spirally
coiled pipe as shown more distinctly in Fig. 7. The end E the "return"
" of this
coil is connected to the aperture a¹ and the end E' the "flow" extends up to near the
top of the kettle as in the preceding examples.
The kettles herein before described are represented in Figs. 1 to 7 as of circular
form while that now to be described and shown in Fig. 8 is preferably of oval or
elliptical form but it will readily be understood that the said kettles may be con-
structed of any other convenient shape.
In the kettle shown in Fig. 8 the boiler " D is in the form of two parallel curved
or bent tubes the ends E E¹ of each of which are connected to and one extends
upward into the kettle proper in a manner similar to that therein before described in
reference to the corresponding ends E E' of the other examples. Instead of two bent
tubes there may be used one or more than two such tubes.
The boilers" D of the forms shown in Figs. 6 and are both adapted to be
passed through an opening in a hot plate into the fire beneath but of course these
as also all the other examples may be readily heated on an open fire or gas stove.
one of the before described kettles water is poured in the ordinary
manner and the water will flow down through the pipe E into the "boiler" D which
will thereby become charged. When heat is applied to the "boiler" D a circulation
is established, the hotter water flowing up through the "flow" pipe pipe E¹ and the
cooler water down through the
" return pipe E in the manner indicated by the
To use

page_text: arrows. The water will thus become heated very quickly and when it boils it will
have no tendency to overflow, the steam having free egress through the lid as before
explained and as indicated by the arrows; and the rush of the boiling water which
enters the kettle only by the pipe E¹ being diverted by the shield F. The water in
the spout would thus only reach the general level of that in the kettle and any
possible overflow by the spout would be further checked by the flow of the water
down the return tube to the boiler and away from the spout. The return tube E is
shown of smaller diameter than the flow tube E¹; this arrangement tends to prevent
a flow of heated water in the wrong direction viz. up tube E and allows for the free
escape of boiling water and steam up the flow pipe. I do not however bind myself
to make these two pipes of different sizes.
By causing the water to circulate through the kettle in the manner before described
incrustation will almost entirely be avoided.
The kettles shown on the drawings are only given as examples for it will readily
be understood that both the parts A and D but particularly the latter are capable of
being constructed in a great many different forms or shapes.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
1. The combination with a tea kettle or the like of a "boiler" such as D sub-
stantially as and for the purpose herein described.
2. The combination with a tea kettle or the like of a "boiler " so connected to it
that when heat is applied to the "boiler" the liquid contained in the said tea kettle is
caused to circulate substantially as herein described.
3. In a tea kettle or the like having a "boiler" and connections for establishing a
circulation of water therein the combination with the "flow" pipe of a screen or
guard plate such as F substantially as herein described and illustrated in the
accompanying drawings.
"
4. The combination with a tea kettle or the like of a cylindrical annular “boiler
substantially as herein described and illustrated in figures 1 to 4 of the accompanying
drawings.
5. The combination with a tea kettle or the like of a flat circular "boiler "imme-
diately below the bottom thereof substantially as herein described and illustrated in
Fig. 5 of the accompanying drawings.
"
6. The combination with a tea kettle or the like of a spiral tubular "boiler
substantially as herein described and illustrated in Figures 6 and 7 of the accom-
panying drawings.
-
7. The combination with a tea kettle or the like of a "boiler" composed of
or more bent tubes substantially as herein described and illustrated in
Figures 8 and 9 of the accompanying drawings.
one
Dated this 19th day of August 1889.
A. C. NUNN.
W. P. Thompson & Boult,
Agents for the Applicant.