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

page_text: Date of Application, 4th Mar., 1897
Complete Specification Left, 6th Dec., 1897-Accepted, 4th Mar., 1898
Improvements in 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 has for its object the production of hoods or mantles or the like for
gas 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 I impregnate the hood, mantle or the like which may
be made of any suitable fabric with an aqueous solution or thin paste of a mixture of
chloride of lime or salt of calcium with caustic soda or other alkali. The mantle is
then dried and the fabric burnt out or consumed in the ordinary manner leaving a
frame or skeleton of lime that is coherent and not liable to crumble away and which
when heated to incandescence emits a most powerful light.
The mantle may be indurated or hardened by immersing it preferably after drying
and before burning off in a solution containing silica.
D
411
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
Improvements in the Manufacture of Incandescence Bodies
for Illuminating Purposes.
I, GUSTAV 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 has for its object the production of hoods or mantles or the like for
gas or other burners which by the action of the flame of the burner are rendered incan-
descent and thereby greatly increase the illuminating power of the flame.
According to this invention I impregnate the hood, mantle or the like, which may
be made of any suitable fabric with an aqueous solution or thin paste of a mixture of
chloride of lime or salt of calcium with caustic soda or other alkali. The mantle is
then dried and the fabric burnt out or consumed in the ordinary manner leaving a
frame or skeleton of lime that is coherent and not liable to crumble away and which
when heated to incandescence emits a most powerful light.
The mantle may be indurated or hardened by immersing it preferably after drying
and before burning off in a solution containing silica or alumina.

page_text: llowing solutions give excellent results:
I. Precipitated chalk
-
Calcined or oxide of magnesia
Solution of ammonia about
Hydrochloric acid about
Methylated spirits or water about
Chloride of lime
Caustic soda (solid)
Caustic potash -
Picric acid
-
Water to suitable consistency.
I. Chloride of calcium
Precipitated chalk
Oxide of magnesia
-
Solution of ammonia to suit consistency.
Hydrochloric acid
7. Chloride of lime
دو
"
"
Hydrated or crude powdered lime
Precipitated chalk
Calcined or oxide of magnesia
Hydrochloric acid to dissolve and suit cons
Methylated spirits
رو
"
"
7. Calcined or oxide of magnesia
Precipitated chalk
Picric acid
Solution of ammonia
Hydrochloric acid till no smell of ammonia
I. Hydrate of aluminium
Caustic soda to dissolve above.
Precipitated chalk
Calcined or oxide of magnesia
-
Solution of ammonia to suitable consistency
Nitric acid
Solution of chloride of calcium
Oxide of magnesia
-
Hydrochloric acid to dissolve the above.
Solution of chloride of lime
Calcined or oxide of magnesia
Hydrated or crude powdered lime
Precipitated chalk
Hydrochloric acid to dissolve above.
Oxide of magnesia
Calcined magnesia
"
Hydrated or crude powdered lime
Hydrate of aluminium
Solution of chloride of calcium-
Hydrochloric acid to dissolve.
Water to suit consistency.

page_text: The limes or carbonates of lime appear to contain as impurities silicates or oxide
of iron which are beneficial. The addition of methylated spirit to all the above
solutions appears to be beneficial.
In order to further the solutions of limes and magnesias etc. they may be boiled
if necessary, and afterwards water may be added.
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
prepared according to any one of the above formulae.
2. 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.
Dated this 4th day of December 1907
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.