Improvements in or connected with the Enamelling of Fire Clay Baths and other Articles.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with the Enamelling of Fire Clay Baths
and other Articles.
I WALTER CLIFF of Western Flatts Wortley in the City of Leeds Fire Clay
Works Proprietor do hereby declare the nature of this invention to be as follows:-
Hitherto fire clay baths have been enamelled or glazed with a hard glaze both
inside and outside. Such baths however have the great disadvantage, especially
when they are afterwards filled with hot water, that the glaze on one side and
even the material of the bath is liable to split and crack, sometimes completely
through.
Now I have discovered that this disadvantage can be obviated by the following
method of glazing or enamelling, which constitutes my invention. This consists
in glazing or enamelling the bath on the inside with a hard glaze as at present,
and then to fire the bath, without any glaze on the outside, in the kiln. After
the bath comes out of the kiln, it is glazed or decorated on the outside with a
softer enamel or spirit varnish, and is then put into a stoving kiln, (i.e. heated
to a much less temperature than in the firing kiln) to harden and fix. The baths
when so enamelled are not subject to the above mentioned disadvantage, and by
this method the bath can be decorated in any shade or tint desired, which is not
always possible or easy when glazed on the outside with a hard glaze.
It will be evident that this invention is applicable to other articles, which may
be liable to the above mentioned defect.
Dotad hi 1941 dor of T..l.. 1907
J. CLARK JEFFERSON,
30 Park Row, Leeds, Agent for Applicant.
Improvements in or connected with the Enamelling of Fire Clay Baths
and other Articles.
I WALTER CLIFF of Western Flatts Wortley in the City of Leeds Fire-clay
Works Proprietor 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:-
Hitherto fire clay baths have been enamelled or glazed with a hard glaze both
inside and outside. Such baths however have the great disadvantage, especially

page_text: when they are afterwards filled with hot water, that the glaze on one side and
even the material of the bath is liable to split and crack, sometimes completely
through.
Now I have discovered that this disadvantage can be obviated by the following
method of glazing or enamelling, which constitutes my invention. This consists
in glazing or enamelling the bath on the inside with a hard glaze as at present
and then to fire the bath, without any glaze on the outside, in the kiln. After
the bath comes out of the kiln it is glazed and decorated on the outside with a
softer enamel or spirit varnish, and is then put into a stoving kiln, (i.e. heated
to a much less temperature than in the firing kiln) to harden and fix. The baths
when so enamelled are not subject to the above mentioned disadvantage, and by
this method the bath can be decorated in any shade or tint desired, which is not
always possible or easy when glazed on the outside with a hard glaze.
It will be evident that this invention is applicable to other articles which may
be liable to the above mentioned defect.
Having now particularly described and ascertained the nature of my said In-
vention and in what manner the same is to be performed I declare that what I
claim is:-
1. The method or process of enamelling or glazing fire clay baths and other
articles of fire-clay with a hard glaze or enamel on the inside and then firing
without any glaze on the outside and after removal from the kiln glazing on
the outside with a softer glaze or spirit varnish and then hardening and fixing
by heating to a considerably less temperature than that of the first firing.
2. Fire-clay baths and other articles of fire clay enamelled or glazed in the
manner herein set forth.
Dated this 22nd day of July, 1897.
J. CLARK JEFFERSON,
30 Park Row, Leeds, Agent for Applicant.