Improvements in Chimney Tops.
Year: 1897

page_text: Improvements in Chimney Tops.
We, JOHANN OTTENS, Work-master, of Altendorf, near Essen, and GEORG
ELSENBUSCH, Manufacturer, of Altendorf, near Essen, in the Province of Rhine-
land and Kingdom of Prussia, do hereby declare the nature of this invention
to be as follows:-
The annexed drawing shows the chimney top in Figures 1 and 2 in side-view
and in upper-view at calm, in Figures 3 and 4 in longitudinal and cross-section
when the wind blows from right hand, whilst Figure 5 represents a special form
of it.
The mantle A, either as drawn of quadrangular or any polygonal or round cross-
section, is closed above by means of a cover C and below this so interrupted by
lateral openings or cuts, that between its remain only narrow, frame- or tongue-like
material-strips D, D, forming the corners of the polygon, if the mantle A is of
polygonal cross-section, or regularly distributed on the circumference of the
cylinder, if the mantle A is of round cross-section. On the outside of each of
the openings is provided a flap or plate E, suspended above hinge-like and movably
tight to A and C and retained below at a distance from A.
In order to attain this, each two flaps E, in face of each other are joined at their
bottom at e by a flexibly arranged rod d, longer than the diameter of the mantle A;
so they are kept in rigid distance from each other.
The flaps can be kept movable above in the simplest manner, as shown in the
drawing, by bending somewhat the ends a of the cover C and the ends b of the
flaps E in opposite direction, so that they are hook-like gearing. At calm the flaps, as
drawn in Figures 1 and 2, are on all sides at a regular distance from A and the smoke
escapes on all corners between E and A. When the wind rises for instance from
right hand it presses, as represented in Figures 3 and 4, the flaps E in face of it
against A, pushing at the same time far away those opposite to it; in this manner
the wind cannot blow into the chimney and the smoke escapes, now on the back-
side by the sufficiently enlarged openings. If the wind is directed to a corner of
the top, it exercises of course a pressure, though weaker, on the two flaps neigh-
bouring to this corner, pushing away the two opposite ones.
The more corners presents A the better would be realized theoretically the in-
tended effect; of course in practice a certain number of corners cannot be surpassed,
considering the size and weight of the flaps E, number and weight of the rods d,
and the like. Figure 5 shows a form of the top with several series of flaps E, one
lying over the other, the lower series being suspended to a special ring or collar a¹.
Of course and especially at a round cross-section of A the openings and flaps of
the two series could be alternately arranged on the circumference.
For the purpose of a better drainage of rain and snow and of a good appearance
the whole top is provided with a more or less simple or ornamented roof B; the
cover may be, as drawn, flat or arched or bowed, the hump being directed down-

page_text: wards; this would be most conformably to the purpose as the rising smoke is
directly pressed then to the sides and corners.
Improvements in Chimney, Tops.
We, JOHANN OTTENS, Work-master, of Altendorf, near Essen, and GEORG
ELSENBUSOH, Manufacturer, of Altendorf, near Essen, in the Province of Rhine-
land and Kingdom of 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:-
The drawing, filed with the provisional specification, shows the chimney-top in
Figs. 1 and 2 in side view and in upper view at calm, in Figs. 3 and
in longi-
tudinal and cross-section when the wind blows from the right hand, whilst Fig, 5
represents a special form of it.
The mantle A, either as drawn of quadrangular or any polygonal or round cross-
section is closed above by means of a cover C and below this so interrupted by
lateral openings or cuts, that between them there are only narrow, frame- or tongue-
like strips of material D, D forming the corners of the polygon if the mantle A is
of polygonal cross section regularly distributed on the circumference of the
cylinder if the mantle A is of round cross-section.
On the outside of each of the openings provided a flap or plate E, suspended
above hinge-like, and movably attached to A and C and retained below at a dis-
tance from A.
In order to attain this, every pair of flaps E, in face of each other are joined at
their bottom at c by a flexibly arranged rod d, longer than the diameter of the
mantle A; so that they are kept at a rigid distance from each other.
The flaps can be kept movable above in the simplest manner, as shown in the
drawing, by bending somewhat the ends a of the cover C and the ends 6 of the
flaps E in an opposite direction, so that they are hook-like gearing. In calm
weather the flaps, as drawn in Figs. 1 and 2, are on all sides at a regular distance
from A and the smoke escapes at all corners between E and A.
When the wind rises for instance from the right hand it presses, as represented
in Figs. and 4, the flaps E in face of it against A, pushing at the same time far
away those opposite to it; in this manner the wind cannot blow into the chimney
and the smoke escapes now at the back by the sufficiently enlarged openings. If
the wind is directed to a corner of the top, it exercises of course a pressure, though
weaker, on the two flaps near to this corner pushing away the two opposite ones.
The more corners A presents the better would the intended effect be realized
theoretically; of course in practice a certain number of corners cannot be exceeded,
considering the size and weight of the flaps E, number and weight of the rods d,
and the like.
Fig. 5 shows a form of the top with several series of flaps E, one lying over the
other, the lower series being suspended to a special ring or collar a¹.
Of course and especially with a round cross-section of A the openings and flaps
of the two series could be alternately arranged on the circumference.
the better to drain off the rain and snow and for the sake of appearance the whole
In order
top is provided with a more or less simple or ornamented roof B; the cover may

page_text: be, as drawn, flat or arched or bowed, the hump being directed downwards, this
would be most in conformity with the purpose as the rising smoke is then directly
pressed to the sides and corners.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
Chimney-top with oscillating suspended flaps, thereby characterized that the
flaps E, arranged before the openings on each side of the chimney top, are bent
at the upper end 6 and lying up their edges turn casily above in the ends of the
borders of the cover which are bent in the opposite direction, and that the rods d,
holding at a certain distance from each other the under ends of each two flaps E
arranged opposite to each other, are longer than the distances between the upper
turning points of two opposite flaps, so that the flaps hang directed obliquely out-
wards and downwards, corresponding to the theoretical angle of incidence of the
wind.
Dated this 25th doy of Oataban 1907
For JOHANN OTTENS and
GEORG ELSENBUSCH,
Bernhard Brockhues.