Improvements in and relating to the Lids of Kettles and similar Water Heaters.
Year: 1892

page_text: Date of Application, 12th Mar., 1892-Accepted, 16th Apr., 1892
COMPLETE SPECIFICATION.
Improvements in and relating to the Lids of Kettles and similar
Water Heaters.
1, CHARLES ABRAHAM HAWORTH of the Falcon Iron Works Bradford near
Manchester in the County of Lancaster, Engineer and Ironfounder, 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:-
The lids of kettles and similar water heaters as generally constructed are too.
heavy or fit too tightly to permit the free escape of steam generated from the
boiling water, and the consequence of the accuinulated pressure is to force the
boiling water through the spout intermittently and to lift the lid.
The object of this invention is to avoid this disadvantage, and for this purpose a
suitable valve of light and simple construction which will permit the free escape of
the steam at a little over the atmospheric pressure and prevent the inlet of smoke,
is secured or arranged within an opening formed in the lid. The valve may be
about three-eighths of an inch diameter or upwards according to the size of the
vessel with which it is to be employed, and is constructed in such a manner that it
cannot be mis-placed or mis-laid except by force or design.
I will particularly describe the construction and arrangement of the valve and
the method of its use with reference to the accompanying drawings in each of the
figures of which similar parts or details, where they are represented, are indicated
by similar letters of reference.
Figures 1, 2, and 3 represent one form of the valve, and Figure 4, 5, and 6 a
modified form.
Figure 1 represents in vertical transverse section, the kettle lid A with a valve
applied thereto. The valve, as fitted in the lid is separately represented in plan
and elevation by Figure 2.
Figure 3 represents in vertical section the valve casing B and the valve C in its
preliminary stages.
The valve casing B is tubular, the lower part being contracted so as to fit within
the hole in the lid A and the upper part being serrated or notched. The valve, which
preferably consists of a thin inetallic disc is seated on the shoulder formed by the
contracted part, and after it has been inserted, the upper serrated or notched part
is turned down, so as at once to secure the valve in place and to permit the free
escape of steam when the valve is lifted. The contracted tubular part of the casing
is inserted through the hole in the lid, and its lower end within the lid is then.
flanged or expanded by means of a suitable die or tool.
As represented by Figures 4, 5, and 6 the valve and casing are formed together
and consist of a flanged tubular closed part so that the casing is lifted with the
valve. The upper part B is flanged so as to rest upon the surface of the lid
around the hole, and the lower tubular part D is notched or serrated.
Figure 4 shews the valve in vertical section as arranged in the lid for work.
Figure 5 represents the valve before its insertion, in vertical section and inverted
plan respectively.
Figure 6 shews the valve separately in elevation as it is arranged in the lid and.
as shewn in Figure 4.
After the valve has been inserted in the hole in the lid, a part of the lower
notched or serrated portion is flanged or expanded, so as to secure it in position.
When the steam has attained a pressure slightly above that of the atmosphere, the
valve is lifted, and the steam escapes through the upper parts of the notches. To
facilitate this escape, the tubular part in which the notches are formed is prefer-
ably made of smaller diameter than the hole.

page_text: It is preferred to make the valve and casing of thin sheet metal but they may
be formed of any other suitable light material.
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. In combination with the lid of a kettle or similar water heating vessel, a light
valve arranged to lift at a low pressure and secured in such a manner that it
cannot be accidentally lost or mislaid, constructed and adapted substantially as
hereinbefore described and as illustrated by the accompanying drawings.
2. A valve for the lid of a kettle or similar water heating vessel, consisting of a
thin disc enclosed in a casing having a contracted part adapted to be secured by
flanging within a hole in the lid, and a notched upper part turned inward to
prevent the displacement of the valve constructed and arranged substantially as
hereinbefore described and as illustrated by the accompanying drawings.
3. A valve for the lid of a kettle or similar water heating vessel, consisting of a
closed tubular part a flanged upper part and a notched and flanged lower part;
constructed and arranged substantially as herein before described and as illustrated
by the accompanying drawings.
Dated this 11th day of March A.D. 1892.
WILLIAM E. HEYS,
Agent for the Applicant.