Improvements in Mantles to be Heated by Gas.
Year: 1897

page_text: Date of Application, 16th Dec.,
1897
Complete Specification Left, 6th Sept., 1898-Accepted, 12th Nov., 1898
Improvements in Mantles to be Heated by Gas.
I, WARREN BODEN SMITH, of 66, College Street, Chelsea, London, S.W., Engineer,
do hereby declare the nature of this invention to be as follows:-
In Patent No. 2110 A.D. 1890 an incandescent or non conductor of heat is coated
with an oxide or oxides that are better heat conductors. Instead of coating an
incandescent with a heat conducting oxide or oxides I obtain much better results by
combining or mixing an incandescent with a heat conducting oxide or oxides and
spreading the mixture upon a body or framework (which I will term a base) made of
the incandescent used or of a substance more or less heat conducting. (2) I use
cadmium oxide in small quantities where it can be advantageously employed in a
base or mantle. In this patent the word mantle shall include all incandescent fila-
ments heated by gas. (3) I make very strong mantles from a solution containing a
mixture or compound of aluminium and chromium salts or oxides without barium or
cadmium oxides. Very good proportions are four parts of alumina and one part of
chromium oxide. (4) I also use a similar solution for coating a suitable base.
Dated this 15th day of December 1897.
Improvements in Mantles for Incandescent Gas Lighting to be
Heated by Gas.
WARREN BODEN SMITH, 66, College Street, Chelsea, S.W., Engineer, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
In Patent No. 2110 A.D. 1890 an ordinary incandescent or non conductor is coated
with an oxide or oxides that are better heat conductors. Instead of coating the
ordinary incandescent with the heat conducting oxide or oxides I mix or combine the
ordinary incandescent or non conductor with the heat conducting oxide or oxides and
spread the mixture upon a framework (which I will term the base) made of the
ordinary incandescent or non conductor used, or of a substance that may be a greater
or less conductor of heat. If a fabric is used in forming the base I prefer to remove
【Drine Q1

page_text: the fabric by burning same before coating the base with the mixture. By the
ordinary incandescent or non-conductor I mean oxides of aluminium, magnesium,
potassium and silicon one or more of these being used. By the heat conducting
oxide or oxides I mean the oxides of chromium, cobalt and tungsten one or more
of these oxides or their suitable salts being mixed with one or more of the ordinary
incandescent oxides aforesaid or suitable salts of same without or with other re-
fractory substances used in incandescent mantles. Mantles prepared in this way may
be used as bases for further treatment.
I also make mantles or bases of mantles from a solution containing a mixture or
compound of aluminium and chromium salts or oxides without or with other refractory
substances used in incandescent mantles.
In-mantles-where-I use thorium oxide-1-also-use-chromium oxide either in the
manner-herein described (the-thorium-oxide-being treated-as-the ordinary incun
descent)-or-as-in-Patent-No.-2110-A.D.-1890 (the-thorium oxide-being-treated as the
ordinary-incandescent).
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
claim is :-
:-
1. A mantle having a coating consisting layer of the ordinary incandescent or
non conducting oxide or oxides mixed or combined with the heat conducting oxide
or oxides substantially as herein described.
2. A mantle having a coating consisting composed of a mixture or compound of
aluminium and chromium oxides substantially as herein described.
3. A mantle containing-thorium-oxide-used in the munner-substantially-as-herein
described.