Improvements in Roofs or Tops for Furnaces or Covered Fireplaces.
Year: 1894

page_text: Date of Application, 6th July, 1894-Accepted, 25th Aug., 1894
COMPLETE SPECIFICATION.
Improvements in Roofs or Tops for Furnaces or Covered Fireplaces.
I, CARL MARTINI of 36 Bahnhofstrasse, Lehrte near Hanover in the Empire of
Germany, Engineer, 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 relates to tops covers or roofs for fireplaces and furnaces of
various kinds and consists in constructing the said tops not as heretofore as stone
vaults or arched masonry but in forming the same of a grating or series of tubes
which serve as conduits for liquids or gases and are thereby protected against
burning whilst the spaces between the several tubes are filled up with bricks.stone
fire-proof clay gannister or other suitable material.
The accompanying drawings illustrate one form of application of my invention
viz. a puddling furnace provided with my new construction of top or roof and I will
now proceed to fully describe my invention with reference to the said accompanying
sheet of drawings.
Fig. 1 is a vertical central longitudinal section.
10 VIC П
DD are the aforementioned tubes which constitute the most essential portion or
the invention and form in combination with the filling E between said tubes the top
or roof of the fire-place and furnace.
F is a layer of non-conducting or bad heat-conducting material for preventing
loss of heat.
In the arrangement illustrated water is employed to cool the tubes it flows from
the water supply tube G into one part of the trough H which is divided by a
partition H into two parts. From the first said part of the trough H the
water flows at uniform temperature through the tubes D and from these through
the return tubes D' into the other half of the trough whence it can be discharged
through the tube J.
This invention has the following most important advantages over the usual
constructions of tops of fireplaces and furnaces:-
The side thrust due to the arched or vaulted form is entirely done away with
because the roof can be made of flat shape even when the furnace is of very great
width and the weight of the brick or stone filling can be distributed uniformly upon
the cooled tubes.
.
In puddling furnaces and other furnaces employed in the iron and chemical
industries where the furnace roof is constantly obliged to be renewed or repaired
within very short periods of time this work is considerably facilitated by the use of
this invention because in most cases the bricks can be built in again without the
necessity for any centering whilst the bricks being besides kept very much cooler
last very much longer than those that are not cooled.
In puddling furnaces heating and annealing furnaces and similar covered in
fire-places or constructions the use of a flat roof enables the heating effect to be
much better utilized because the heating gases are caused by the flat roof to pass
nearer to the article to be heated than can be the case with arched or domed tops.
Should however an arched or domed roof or top be desired in special cases there is
no difficulty in constructing the same according to my present invention only that
ID Q.7

page_text: it is necessary to use tubes which are bent or curved to suit the curvature of the
arched or domed roof.
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 top or roof for fireplaces and furnaces constructed of tubes adapted to be
cooled by the passage therethrough of liquids or gases and a filling of brick stone
or other suitable material between said tubes combined and arranged to act
substantially in the manner and for the purposes herein before described.
2. The improved construction of the tops or roofs of furnaces or fireplaces
substantially in the manner and for the purposes hereinbefore described and
illustrated by way of example in the drawings hereunto annexed.
STELLA. onl J
STL 100
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.