Improvements in Cowls for Chimneys, Ventilating Shafts, or the like.
Year: 1896

page_text: Date of Application, 7th Aug., 1896
Complete Specification Left, 8th Sept., 1896-Accepted, 19th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Cowls for Chimneys, Ventilating Shafts, or
the like.
I, WILLIAM FRANKLIN ELSTON, of Market Street, Crewkerne, in the County
of Somerset, Ironmonger, do hereby declare the nature of this invention to be
as follows:-
This invention relates to cowls or hoods for chimneys ventilating shafts or the
like and is as follows:-
At or near the top of the shaft or vertical passage through the cow] (which shaft
or passage inay advantageously. be tapered or narrowed towards the outlet
therefrom) I arrange on the exterior thereof a circular double coned flange or
sloping lip so that the outside edge of this flange lies a little below the top or outlet
of said shaft or vertical passage and thus forms an outwardly and downwardly
sloping ledge all round said outlet.
Centrally over this lip or flange and the said outlet or vertical passage I arrange
at a suitable distance above same a circular conical top or sloping cover (supported
in any suitable manner-for instance on vertical rods) which thus leaves a clear
space of equal depth or thereabouts all round between said sloping lip or flange
and said sloping cover or in other words the angle of the slope of said lip and of
said cover respectively being the same or thereabouts.
Dated this Sixth day of August 1896.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C..
Agents for the Applicant.
Improvements in Cowls for Chimneys, Ventilating Shafts, or
the like.
I WILLIAM FRANKLIN ELSTON of Market Street, Crewkerne, in the County
of Somerset, Ironmonger, 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 cowls or hoods for
the like which I will hereinafter fully describe with reference to the accompanying
drawings in which
Fig. 1 is a vertical section, and
chimneys ventilating shafts or
Fig. 2 a plan, of a chimney cowl according to my said invention.
At or near the top of the shaft or vertical passage A through the cowl (which
shaft or passage A may advantageously be tapered or narrowed towards the outlet
therefrom) I arrange on the exterior thereof a circular double coned flange or
sloping lip B so that the outside edge B¹ of this flange lies a little below the top
or outlet of said shaft or vertical passage A and thus forms an outwardly and
downwardly sloping ledge b all round said outlet while the under side 6' of said
flange B meets the said ledge b at B' and thus completes the lip B.

page_text: Centrally over this lip or flange B and the said outlet or vertical passage A,
I arrange at a suitable distance above same a circular couical top or sloping cover C
(supported in any suitable manner for instance on vertical rods c) which thus leaves
a clear space of equal depth or thereabouts all round between the ledge 6 of said
sloping lip or flange B and said sloping cover C or in other words the angle
of the slope of said ledge b and of said cover C respectively being the same or
thereabouts.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner same is to be performed I declare that what I
claim is :-
1. A cowl for chimneys ventilating shafts or the like having a sloping cover such
as C held at a distance above the top of the shaft in combination and acting in
conjunction with a sloping lip such as B around said top of the shaft the slope of
the ledge b corresponding with the slope of the cover C substantially in the
manner and for the purposes herein before described and illustrated in the drawings
hereunto annexed.
2. The improved arrangement and construction of cowls for chimneys
ventilating shafts or the like substantially in the manner and for the purposes
hereinbefore set forth.
Dated this 8th day of September 1896.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant..