Improvements in or connected with the Manufacture of Incandescence Bodies for Illuminating Purposes.
Year: 1897

page_text: Improvements in or connected with the
Manufacture of
Incandescence Bodies for Illuminating Purposes.
I, GUSTAVE LEON ALBERT COUNT DE HAMEL DE MANIN, of 88, Cornwall Gardens,
South Kensington, in the County of London, do hereby declare the nature of this
invention to be as follows:-
This invention for improvements in the manufacture of incandescence bodies for
illuminating purposes has for its object the production of hoods or mantles or the
like for gas, oil or other burners which by the action of the flame of the burner are
rendered incandescent and thereby greatly increase the illuminating power of the
flame.
According to this invention, the hood or mantle or the like, which may be made
of any suitable fabric, is impregnated with an aqueous solution or thin paste of a
mixture of a salt of lime and a salt of magnesia. These may be dissolved in hydro-
chloric or nitric acid, or other suitable solvent. Meerschaum calcined oyster shells,
sulphur or methylated spirits or any carbonaceous oil may be added. The hoods or
mantles may be coloured by the addition of bichromate of potash, nitrate of cobalt,
uranium, strontium, or similar colouring salt.
The fabric of the hood or mantle may be constructed of a platinum or other
suitable wire or carbon filament wound or surrounded with cotton, or simply dipped
in the solution or thin paste. A filament so constructed is also applicable to incan-
descent electric lamps.
Dated this 20th day of December 1897
WHEATLEY & MACKENZIE,
40, Chancery Lane, Loudon, W.C., Agents.
Improvements in or connected with the Manufacture of
Incandescence Bodies for Illuminating Purposes.
I, GUSTAVE LEON ALBERT COUNT De Hamel de MANIN, of 88, Cornwall Gardens,
South Kensington, in the County of London, 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:-
This invention for imurovements in the manufacture of incandescence bodies for

page_text: illuminating purposes has for its object the production of hoods or mantles or the like
for gas, oil or other burners which by the action of the flame of the burner are
rendered incandescent and thereby greatly increase the illuminating power of the
flame.
According to this invention, the hood or mantle or the like, which may be of any
suitable fabric, is impregnated with an aqueous or alcoholic solution or thin paste of
a mixture of a salt of lime and a salt of magnesia. These may be dissolved in hydro-
chloric or nitric acid, or other suitable solvent. A salt of aluminium, or a silicate of
calcium or magnesia or meerschaum, calcined oyster shells, may be added. A small
percentage of bichromate of potash, nitrate of cobalt, uranium, strontium,
or similar colouring salt, may be added to colour the light emitted from the
mantle.
The fabric of the hood or mantle may be constructed of a platinum or other
suitable wire or carbon filament wound or surrounded with cotton, A filament so
constructed is also applicable to incandescent electric lamps.
The following proportions give excellent results :--
7 drachins chloride of calcium.
7 drachms chloride of magnesium
1 grain tungstic acid.
1 grain nitrate of aluminium.
In three ounces of water.
Or
7 drachms chloride of magnesium.
7 drachms nitrate of calcium.
1 grain tungstic acid.
1 grain nitrate or chloride of aluminium.
In three ounces of water.
7 drachms acetate of calcium.
Or
7 drachms acetate of magnesium.
1 grain tungstic acid.
1 grain nitrate or chloride of aluminium or silicate of lime.
In three ounces of water.
The water or methylated spirits and the aluminiums and the silicates may be
varied in their proportions in proportion to the light required, the shrinkage of
the cotton required, and of the hardness required, or they need not be used
at all.
Instead of cotton any other suitable fabric may be used with my solutions, and
any other shape besides that commonly known as a mantle or hood may be used with
my solutions such as a carbon of mantle form or of any other form with or without the
cotton wound round the same.
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 solution for impregnating incandescence bodies for illuminating purposes
consisting, substantially of a mixture of a salt of calcium with a salt of magnesia.
2. A solution for impregnating incandescence bodies for illuminating purposes
prepared according to any one of the formulae above mentioned.
3. A solution for use in the manufacture of incandescence bodies for illuminating
purposes prepared substantially as described according to any one of the above
formulae.
4. A hood mantle or incandescence body for illuminating purposes consisting of a
platinum or carbon filament coated with an incandescence substance, according to the
process described.

page_text: 5. A fabric or body for the hood, mantle, or incandescence body for illuminating
purposes consisting of a platinum er carbon filament covered or surrounded with cotton
or the like.
Dated this 20th day of October 1808
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.