Improvements in or relating to Kettles for Boiling Water.
Year: 1893

page_text: Date of Application, 18th May, 1893-Accepted, 8th July, 1893
COMPLETE SPECIFICATION.
Improvements in or relating to Kettles for Boiling Water.
I, ANDREAS KRALUND, of Kolding, in the Kingdom of Denmark, Merchant,
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 relates to improvements in kettles for boiling water, more especially
domestic kettles, and the object of it is to provide a kettle with a whistle adapted
to be sounded by the escaping steam in order that the fact of the water being on
the boil may be audibly announced to those whom it may concern.
The economical advantages of the use of gas for cooking purposes are due to the
fact that the consumption of the gas can be stopped or reduced immediately the
desired temperature has been obtained; whereas, when ordinary fuel is used,
the combustion continues. It is, therefore of some importance to carefully regulate
the consumption of gas so that it may not continue after the water in the kettle
has been brought to the boiling point, but that it may be reduced to only the
quantity necessary to maintain flame just sufficient to prevent the water cooling to
any considerable extent.
The present invention deals with a kettle fitted with a signalling apparatus
which gives an alarm when the water begins to boil. This alarm not only serves
to attract the attention of those engaged in the kitchen, but also to warn a
mistress who is desirous of preventing an unnecessary consumption of gas by her
servants.
In order that the invention and the means by which it is to be carried into
practical effect may be thoroughly understood, I will now describe it and them in
detail, referring in so doing to the accompanying figures which are to be taken as
part of this Specification and read therewith."
Fig. 1 is a side elevation of a kettle made according to the present invention.
Fig. 2 is a longitudinal section of the plug and whistle.
In common with other boiling vessels, the kettle K has a flat bottom formed so
as to offer the maximum heating surface. It is provided with a handle H and a
spout T, this latter having, relatively speaking, a very wide orifice to enable it to
be used for filling purposes, for my improved kettle is without the usual covered
filling hole.
The spout T is fitted with a hollow plug or stopper P. This plug or stopper is
made with a handle and is shaped like an ordinary kettle lid with a rim and slips
into the throat of the spout T.
A hole L is made on the surface or in the side of this stopper and has opposite
to it a sharp angle or other device, whereby a whistling apparatus may be formed
similar to the common mouth-whistles. The latter is shown by Figure 2 as made
from a pipe which is attached to the handle of the stopper P in such a way that
its orifice, which faces downwards, forms a sharp angle exactly opposite the hole L
in the lid of the stopper.
When the water has reached the boiling point, the steam generated escapes
through the hole L and, when it is of sufficient power, produces a shrill whistling
sound, which at once informs the household that the water is boiling and that the
gas under the kettle may either be extinguished or lowered to the point necessary
to keep the kettle warm enough to keep up the temperature of the water without
actually boiling. As the steam generated can only escape by the small opening L,
the water is brought up to boiling point much more quickly, and will also retain
its heat in conjunction with the kettle, for a longer period, than in the case of
ordinary kettles.

page_text: 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. A. boiling apparatus especially suited for domestic purposes characterised by
having only one opening both, for filling and emptying purposes; said opening
being provided with a plug or stopper P in or upon which there is a whistle through
which the steam generated in the kettle finds its way, thereby producing a shrill
whistling noise as soon as the water boils.
2. The application to a kettle, of the nature stated under Claim 1, of a plug or
stopper P which has a small hole having opposite to it a sharp angle in such a way
as to form a whistling apparatus similar to common mouth whistles, by which the
steam generated during boiling is forced to escape.
Dated this 18th day of May 1893
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.