An Improved Cowl or Wind Guard for Chimneys and Ventilating Shafts.
Year: 1891

page_text: Date of Application, 4th Dec., 1891
Complete Specification Left. 19th Aug., 1892-Accepted. 24th Sept., 1892
PROVISIONAL SPECIFICATION.
An Improved Cowl or Wind Guard for Chimneys and Ventilating
Shafts.
I, MARTIN NEUERBURG, Civil Engineer of No. 9 Allerheiligenstrasse, Cologne
in the Empire of Germany do hereby declare the nature of this invention to be as
follows:-
This invention consists in a bell or cone shaped covering suspended or balanced
on a point above the mouth of the chimney or shaft so that the wind blowing
against this bell tilts it out of its normal position until its edge rests against the
edge of the chimney or shaft on the side on which the wind is blowing.
To cause this cowl or guard when in this position to direct the wind so that it
exercises a drawing or sucking action on the air or smoke rising in the chimney or
shaft, the mouth of the latter is surrounded by a conical flange or skirt so that the
wind meeting this skirt is deflected upward into the bell and outward at the side
which is farthest away from the chimney or shaft in the position which the pressure
of the wind causes the bell to assume.
A bracket fixed on the mouth of the chimney or shaft carries a central vertical
pin on which the bell or conical guard is pivoted to rock freely. The bracket
carries along a horizontal deflecting plate inside the bell and at a suitable distance
above the mouth of the chimney. The bell carries a central staff with a counter
weight which renders the bell as sensitive to the wind as may be desired. The bell
is prevented from being lifted and blown off its pivotal point by a suitable strap
frame.
Dated this 4th day of December 1891.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
An Improved Cowl or Wind Guard for Chimneys and Ventilating
Shafts.
I MARTIN NEUERBURG Civil Engineer of No. 9 Allerheiligenstrasse, Cologne
in the Empire of Germany, 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 consists in a bell or cone shaped covering suspended or balanced
on a point above the mouth of the chimney or shaft so that the wind, blowing
against this bell, tilts it out of its normal position until its edge rests against the
edge of the chimney or shaft on the side on which the wind is blowing.
To cause this cowl or guard when in this position to direct the wind so that it
exercises a drawing or sucking action on the air or smoke rising in the chimney or
shaft, the mouth of the latter is surrounded by a conical flange or skirt, so that the
wind meeting this skirt is deflected upward into the bell and outward at the side
which is farthest away from the chimney or shaft in the position which the pressure
of the wind causes the bell to assume.
A bracket fixed on the mouth of the chimney or shaft carries a central vertical
pin on which the bell or conical guard is pivoted to rock freely. The bracket
carries also a horizontal deflecting plate inside the bell, and at a suitable distance
above the mouth of the chimney.

page_text: The bell carries a central staff with a counterweight which renders the bell as
sensitive to the wind as may be desired.
The bell is prevented from being lifted and blown off its pivotal point by a
suitable Strap frame. The bell may be circular in plan, or oval, in which case it
may be provided with two radial wings in prolongation of the vertical plane which
contains its smallest diameter.
The size and strength of the cowl or guard are suitable to its purpose whether
for chimneys, smoke shafts, ventilating shafts and the like outside buildings, or for
the chimneys of lamps which may be exposed to gusts of wind.
In the drawing
Fig. 1 is a vertical central section of the improved wind guard. Fig. 2 is a side
elevation thereof and Fig. 3 is a plan view.
A is a length of pipe to be fitted on the chimney. B is a strap or frame carrying
the central pin C and the deflecting plate D. E is the bell or cone pivoted on the
point of the pin C and adapted to swing in any direction on this point until its edge
comes in contact with the edge of the pipe A. H is the counter-balance weight
fixed on the stem G on the bell E. F is a strap connected at its ends to the bell E
and passing under the collar F on the pin C. This strap prevents the bell from
being blown off the chimney. I is the conical or inclined skirt or flange which
surrounds the pipe A just below its mouth. J are the wings before mentioned.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
A cowl or guard comprising a freely pivoted bell of larger diameter than the
mouth of the shaft or its equivalent and counter weighted above its pivot, a conical
skirt around the said shaft and a horizontal deflecting plate over the mouth thereof
the whole substantially as described and for the purpose set forth.
Deted this 19th day of August. 1892.
HERBERT & Co.,
18, Buckingham Street, London, W.C., Agents to Applicant.