Improvements in Furnaces for Continuous Use.
Year: 1895

page_text: Date of Application, 19th Feb., 1895
Complete Specification Left, 18th Dec., 1895-Accepted, 1st Feb.,
1896
PROVISIONAL SPECIFICATION.
Improvements in Furnaces for Continuous Use.
We, HERMANN NIEWERTH, Electrician, and REGINA NIEWERTH, no occu-
pation, both of 23, Spener Strasse, Berlin Prussia, do hereby declare the nature
of this invention to be as follows:-
A furnace according to this invention has one fire grate and several heating
chambers for burning or heating various material, the arrangement being such
that the fire is or can be passed into the different chambers at will, or shut off
from any, thereby admitting continuous work to be done, as while one or more of
the chambers are in use the others can be open for the reception of the material
and the fire directed into them when it is shut off from the others. Such a battery
of furnaces is particularly suitable for baking or burning carbon pencils for arc
lamps. The invention is carried out as follows:-First a suitable enclosed fire
grate furnace is provide, at the ends of which are tiers of heating chambers, say
four; the fire is conducted by flues and dampers into any of these at will and then
passes out to the chimney. In working, it is preferred to first conduct the fire into
the bottom chamber from which it passes by an upright flue at end to the chamber
above, from this the fire passes to the chimney, the other two upper chambers
being cut off by suitable damper. Each of the chambers are fitted with air inlet
and outlet valves to heat air, which can be carried to the grate to feed the same
for combustion instead of cold air; or the air can be directed into the flue of the
grate to further assist combustion.
Dated this 19th day of February 1895
FREDERIC PRINCE,
Agent for Applicants.
improvements in Furnaces for Continuous Use.
We, HERMANN NIEWERTH, Electrician, and REGINA NIEWERTH, no occu-
pation, both of 22 Spener Strasse, Berlin, Prussia, 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 :-
A furnace arrangement according to this invention has one fire grate for several
heating chambers for burning or heating various materials, the arrangement being
such, that the fire is or can be passed into the different chambers at will, or shut off
from any, thereby admitting continuous work to be done; as while one or more of
the chambers are in use, the others can be opened for the reception of the materials
and the fire directed into them when it is shut off from the others. Such a battery
of furnaces is particularly suitable for baking or burning carbon pencils for are
lamps.
To enable this invention to be properly understood we will proceed to describe
the same with aid of the accompanying drawings: in which,
Figure 1 is a sectional elevation of a multiple arrangement according to this
invention.

page_text: Figure 2 a plan view through middle of Fig. 1.
Figure 3 sectional elevation of a single furnace as arranged for burning
carbon pencil for arc lamps.
Figure 4 cross sectional elevation of same.
The multiple set of furnaces consists of say four chambers or ovens A, B, C, D,
having a common grate E. F, outlet for heated gases to the respective ovens. The
heat first passes into oven A, thence to oven B through passage G, and out through
flue H to chimney. The passage G and flue H, are fitted with usual dampers (not
shown to shut off the fire from ovens A or B. The ovens C and D are also similarly
fitted with dampers for the same purpose. When the fire passes into ovens A and B,
it is or may be shut off from ovens C and D: the heat passes to the latter by
passage G. Ovens B and D have lateral passages J and J¹, to enable the
atmosphere to pass into the ovens when desired; these passages are also fitted with
dampers or doors. When all the oven dampers are closed, the heat from fire
passes up flue K to chimney. L, L, L, L³, doors to ovens.
It will thus be understood that the ovens can be used either altogether or
separately. When the furnace is used for burning or baking carbon pencils,
instead of the same being placed in crucibles as at present, the hearth of the oven
can he made as shown at Figure 3, M representing a number of carbon pencils
embedded in carbon dust or other material to prevent the pencils sticking one to
another.
The above arrangement of furnace is particularly suitable for use for such
materials as it is desirable to first dry for a certain length of time before baking,
as the heat from the next lower oven to a certain extent heats the one over it,
thereby economising heat and admitting a continuous process and heating to go
For certain articles it is desirable to gradually cool the same in the oven after
baking before removing; for this reason, some of the ovens are fitted with the side
passages J and J', to enable the atmosphere to pass into same.
on.
°
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :
1. A battery of ovens constructed and operated substantially as hereinbefore
described and illustrated by the accompanying drawings.
2. The shape for the hearth of a furnace for baking carbon pencils, as illustrated
at Figure 3.
Dated this 18th day of December 1895.
FREDERIC PRINCE,
37 Cursitor Street, London, E.C., Agent for Applicants..