Improvements in Cowls and Ventilators.
Year: 1891

page_text: Date of Application, 13th May, 1891-Accepted, 13th June, 1831
COMPLETE SPECIFICATION. .
Improvements in Cowls and Ventilators.
I, GUSTAV BISchorr, of 1 Theresien Platz, Bamberg, in the Empire of
Germany, Engineer, do hereby declare the nature of my said invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
The object of my invention is to manufacture cowls and ventilators in an
improved manner, whereby simplicity in construction and efficiency in operation
are secured.
And in order that my said invention may be particularly described and ascertained
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a sectional elevation of a fixed (non rotating) cowl and ventilator
formed with two openings.
Fig. 2 is an elevation of a fixed cowl and ventilator formed with four openings.
Fig. 3 is a sectional elevation of a rotating cowl and ventilator.
Fig. 1 shows a form of cowl suitable for railway carriages and steam vessels:
a are two conical mouth pieces fixed to the horizontal tube . c is the vertical
flue leading to b.
Fig. 2 shows a form of cowl suitable for buildings, chimneys, closets and other
structures, having four conical mouth pieces a a, fixed to a four-way pipe 1. e is
the vertical Hue leading to .
Fig. 3 shows a form of cow! also suitable for buildings, chimneys, and other
structures, in which is a conical month piece, opening into the horizontal tube b.
The tube e, leading to the tube b, is fitted with a flange d. e is a tube fixed in
the flue, and also fitted with a flange, in which antifriction balls g g are carried to
sustain the weight of the cowl and reduce friction. ƒ is a wind vane which keeps
the mouth facing the wind.
In each of the arrangements above described, the inflowing air is concentrated
and its pressure increased in one of the conical mouth pieces a leading to the tube b,
through which it proceeds to the opposite end, where it acts on the principle of the
ejector, and where also a partial vacuum is formed by the external wind; the
effect being that a powerful updraught is induced in the pipe <, and the required
ventilation is effected.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
€
1. In the construction of cowls and ventilators, the combination of a ventilating
fluc surmounted by a horizontal tube b, fitted at each end with a conical mouth
piece a, substantially as and for the purposes herein before described and
illustrated by Fig. 1 of the drawings,
2. In the construction of cowls and ventilators, the combination of a ventilating
flue c, surmounted by horizontal tubes bb, at right angles to each other; such
tubes & being fitted with four conical mouth pieces, substantially as and for the
purposes herein before described and illustrated by Fig. 2 of the drawings.
3. In the construction of cowls and ventilators, the combination with a ventilating
flue, of a tube c', supported by and revolving upon ball bearings, surmounted by.
the horizontal tube b, fitted with a conical mouth piece a and vane ƒ, substantially

page_text: as and for the purposes herein before described and illustrated by Fig. 3 of the
drawings.
4. The general construction, arrangements, and combinations of the several and
respective parts, together forming my invention of Improvements in cowls and
ventilators, substantially as herein before described and illustrated by the 5
drawings.
Dated 12th ML 1001
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.