Improvements in Chimney Cowls.
Year: 1896

page_text: Improvements in Chimney Cowls.
I WILLIAM ALLEN, of Glenryn, Walpole Road, Boscombe, Bournemouth,
Gentleman, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in chimney cowls, and consists in pro-
viding at the upper part of the cowl a suspending bracket through which passes a
rod having attached to its lower end a cap or cover of inverted cone shape.
The upper part of the said rod is screw-threaded and provided with a nut for
the purpose of adjusting, or raising and lowering, such rod and the cap or cover
at the lower end of same within the interior of the cowl.
Any equivalent adjusting means may be employed in lieu of the screw-thread
and nut aforesaid.
The cowl is preferably supported by brackets resting upon a projecting rim on the
chimney pot.
The suspending rod is steadied by a cross-stay situated within the cowl
immediately above the chimney pot, the said rod passing through such stay.
The suspended cap or cover normally hangs down immediately over the top
of the flue, and it can be raised or lowered at will in the manner beforedescribed.
The cowl, with the exception of the suspending bracket, rod and stay may
conveniently be formed of earthenware.
Dated this 3rd day of December 1896.
HUGHES, SON & Co.,
38 Chancery Lane, W.C., Agents for the Applicant.
I, WILLIAM ALLEN, of Glenryn, Walpole Road, Boscombe, Bournemouth,
Gentleman, 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 improvements in chimney cowls, and has for its
principal object to prevent down-draughts in chimneys and the emission of
smoke at their lower ends, usually caused by such down-draughts. And in order
that this my said invention may be the more readily understood and carried
into practical effect reference is hereby made to the accompanying sheet of
illustrative drawings, wherein :
Fig. 1 is a sectional elevation of my improved cowl, and

page_text: Referring to the drawing, in which like letters of reference indicate corre-
sponding parts throughout both figures, a is a suspending bracket, fixed to, or
formed integral with the sides 6 of the cowl. Through a circular aperture in
this suspending bracket passes a screw-threaded rod c, to the lower end of which
is attached in any suitable manner a cap or cover d of inverted cone-shape. The
said screw-threaded rod c is provided with an adjusting nut for the purpose
of regulating or adjusting the height of the cap or cover d within the cowl, such
adjustment being accomplished by unscrewing the nut c¹, if it is desired to lower
the cap or cover d, and vice-versa when the said cap or cover is to be raised. A
suitable stop is provided at the upper extremity of the threaded rod c. Normally,
the cap or cover d hangs down immediately over the top of the flue but by
means of the above described adjusting device, such cap or cover can be readily
raised or lowered to a position deemed desirable or convenient.
The flat upper part or surface of the cap or cover d may be surrounded with
a raised rim having outlets in the form of two or more spouts d². The latter
are intended for the purpose of carrying off the water that may accumulate upon
the surface of the cap or cover d, but they also act as stops, in conjunction
with vertical projections f upon the interior of the cowl b, to prevent such cap
or cover d being revolved completely by the wind or similar causes.
The said vertical projections f also act as guides or baffles to facilitate the
wind passing out through the top or bottom of the cowl proper.
Space is left between the sides 6 of the cowl proper and the flue e, which latter
projects a suitable distance within the cowl proper b. The two aforesaid parts
may be connected together by the brackets g, or by any other equivalent means.
I may provide brackets (not shewn), or a flange h upon the outside of the flue e,
which may rest upon the rim of the chimney pot when the cowl is fixed in
position thereon. The said flange h also serves to carry off the rain and prevents
same finding an entrance into the chimney.
A suitable cross-stay may be provided if desirable for the purpose of steadying
the suspending rod and its connections.
My improved cowl may be formed entirely of metal, or it may conveniently
be fashioned of earthenware, with the exception of the suspending rod, bracket
and stay, and such cowl may be either of a round or square form according as
desirable or convenient.
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 chimney cowls, the interiorally situated inverted cone-shaped cap or
cover adapted to be raised or lowered by means of a screw-threaded rod passing
through a suspending bracket and actuated by a nut, substantially as and for the
purpose described and shewn.
2. In chimney cowls, the interiorally situated inverted cone-shaped cap or
cover, capable of being adjusted as to height, and having a flat surface surrounded
by a rim having outlets or spouts which act also as stops in conjunction with
vertical strips within the cowl; together with a supporting flange or brackets 4
upon the outside of the flue, the whole arranged, combined and operating sub-
stantially as and for the purpose described and illustrated.
Dated this 3rd day of September 1897.
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C.