Improvements relating to the Electric Heating of Pottery and other Furnaces, and Materials therefor.
Year: 1892

page_text: Date of Application, 16th July, 1892
Complete Specification Left, 15th Apr., 1893-Accepted, 20th May, 1893
PROVISIONAL SPECIFICATION.
Improvements relating to the Electric Heating of Pottery and other
Furnaces, and Materials therefor.
I, FERDINAND VON POSCHINGER of Buchenau in the Kingdom of Bavaria
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to utilize electric currents either without or in
addition to the usual methods of heating for smelting or pottery or glass burning
or annealing furnaces, muffles or other furnaces or chambers in which great heat is
required. By employing this invention in addition to the ordinary means of
heating, a greater heat may be obtained readily and when required in such furnaces,
while in any case the employment of this invention permits of the heating being
entirely under control so that the temperature in the furnace may be raised or
lowered, kept steady or made to gradually increase or decrease.
The invention consists in passing electric currents through suitably resistant
surfaces on the floor walls or vaulting of such furnaces so that the goods or
materials in the furnace may be heated by conduction or by radiation as desired
by the heat produced and given off from such surfaces by the passage of suitably
strong currents.
Such furnaces are usually constructed of brick or fire brick made from baked
clay or earth or from quartz sand or the like mixed with suitable binding material.
Such bricks are such bad conductors of electricity as to be practically insulators.
To render the furnace suitable for the conduction of electric currents in the desired
way the inner walls or the surface of the floor or the under surfaces of the vaulting
as desired are built of bricks or slabs made either by mixing a proportion of ground
graphite with the other aforesaid materials or by arranging a layer of graphite with
if necessary binding material on that side of the brick or slab which is to be the
inside surface, during the making of such bricks or slabs. In building up the
furnace these special bricks or slabs are taken to form the inside surface wherever
the current is to pass and the mortar used is also rendered conductive by being
made with graphite. The non conductive bricks or parts of bricks are set in
ordinary mortar or cement in the usual way. The electric leads are suitably built
into the furnace.
The special bricks may be used as a lining for converting furnaces already built
to be used on this principle.
TI
1345
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Electric Heating of Pottery and other
Furnaces, and Materials therefor.
I FERDINAND VON POSCHINGER of Buchenau in the Kingdom of Bavaria,
Germany, Manufacturer, 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 object of this invention is to utilize electric currents either without or in
addition to the usual methods of heating for smelting or pottery or glass burning
or annealing furnaces, muffles or other furnaces or chambers in which great heat
z 1

page_text: is required. By employing this invention in addition to the ordinary means of
heating, a greater heat may be obtained readily and when required in such
furnaces, while in any case the employment of this invention permits of the heating
being entirely under control, so that the temperature in the furnace may be raised
or lowered, kept steady or made to gradually increase or decrease.
The invention consists in passing electric currents through suitably resistant
surfaces on the floor, walls or vaulting of such furnaces, so that the goods or
materials in the furnace may be heated by conduction or by radiation as desired
by the heat produced and given off from such surfaces by the passage of suitably
strong currents.
Such furnaces are usually constructed of brick or fire brick made from baked
clay or earth or from quartz sand or the like mixed with suitable binding material.
Such bricks are such bad conductors of electricity as to be practically insulators.
To render the furnace suitable for the conduction of electric currents in the desired
way the inner walls or the surface of the floor or the under surfaces of the vaulting
às desired are built of bricks or slabs made either by mixing such a proportion of
ground graphite with the other aforesaid materials, that the brick becomes a con-
ductor of electricity of suitable resistance or by arranging a layer of graphite with
if necessary building material on that side of the brick or slab which is to be the
inside surface, during the making of such bricks or slabs. In building up the
furnace these special bricks or slabs are taken to form the inside surface wherever
the current is to pass and the mortar used is also rendered conductive by being
made with graphite. The non-conductive bricks or parts of bricks are set in
ordinary mortar or cement in the usual way. The electric leads are suitably built
into the furnace.
The special bricks may be used as a lining for converting furnaces already built
to be used on this principle.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1.) The method of heating pottery and other furnaces by means of electric
circuits in the walls or surface of the walls thereof adapted to develop and radiate
heat by the passage of the current or currents.
2.) The method of constructing or lining a furnace chamber for conduction of
electric currents by use of bricks of conductive but resistant material and similar
mortar where required.
3.) Bricks made of or with a coating or layer of electrically conductive but
resistant material adapted to be heated by passage of an electric current and
suitable for use as described.
Dated thin 15th
A 1000
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.