Year: 1899

page_text: I, RICHARD DURRANT LANGLEY, of Kendal Avenue, Epping, in the County of Essex,
Engineer, do hereby declare the nature of this invention to be as follows:-
:-
My invention relates to chimney cowls of the kind provided with a vane which
serves to more or less turn the cowl according to the direction of the wind, the
object of my invention being to provide a cowl which is of simpler construction
than cowls as heretofore constructed and which at the same time offers less
impediment to the escape of smoke from the chimney and affords less space for the
accumulation of soot.
According to my invention instead of making use of a hood as has heretofore
been usual I make use of a shield bent to the arc of a circle and having a width
corresponding with say a third of the circumference of the chimney pot to which
my cowl is applied. This shield is provided on the concave face with a bracket
which rotates on a pivot or pin carried at the centre of the chimney pot, the said
bracket also having fixed to it the vane against which the wind acts for moving the
shield.
A cowl of the construction hereinbefore described will remain much steadier in
a wind than the ordinary hood shaped cowl as the action of the wind upon the
shield will have very little, if any, power to turn the same, the turning movement
being due to the action of the wind upon the vane, which is not the case with a
cowl having a hood, where the wind acts upon the sides of the said hood.
01
Joof Tonuary 1899.
G. F. REDFERN & Co,
4, South Street, Finsbury, London,
Agents for the Applicant.
I, RICHARD DURRANT LANGLEY, of Kendal Avenue, Epping, in the County of Essex,
Engineer, 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:-
1
My invention relates to chimney cowls of the kind provided with a vane which
serves to more or less turn the cowl according to the direction of the wind, the object
of my invention being to provide a cowl which is more effective and of simpler
construction than cowls as heretofore constructed and which at the same time

page_text: offers less inpediment to the escape of smoke from the chimney and affords less space
for the accumulation of soot.
According to my invention instead of making use of a hood as has heretofore
been usual I make use of a shield bent to the arc of a circle and having a width
corresponding with say a third of the circumference of the chimney pot to which
my cowl is applied. This shield is provided on the concave face with a bracket
which rotates on a pivot or pin carried at the centre of the chimney pot, the said
bracket also having fixed to it the vane against which the wind acts for moving the
shield so that its convex face faces in the direction from which the wind blows, the
wind as it passes the shield tending to induce an up draught in the flue and assist
the smoke to get clear away.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which:
Figure 1 is an elevation of a chimney cowl constructed according to my
invention; and,
Figure 2 is a plan of the same.
is the shaft portion of the cowl, which may be made so that the ordinary
chimney pot can be dispensed with or so that it can be applied to a chimney pot,
and b is a cross bar fixed to the said shaft and carrying the pin or pivot c upon
which the movable part of the cowl rotates.
d is the shield and e is the arm or bracket carrying the same the said bracket
having the tubular portion f which fits over and rotates upon the pin c.
vane which is also fixed to the bracket e.
g is the
A cowl of the construction herein before described will remain much steadier in
a wind than the ordinary hood shaped cowl, as the action of the wind upon the
shield will have very little, if any, power to turn the same, the turning movement
being due to the action of the wind upon the vane, which is not the case with a cowl
having a hood, where the wind acts upon the sides of the said hood. It will also
be obvious that owing to the steadiness of my cowl the noise which so frequently
accompanies the movements of a cowl will be less frequent.
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. A chimney cowl provided with a shield which does not envelope the shaft of
the cowl so as to leave a free passage for the escape of smoke the bracket carrying
the said shield being provided with a vane which serves to retain the shield with
its convex face facing the direction from which the wind blows, substantially as
described.
2. The manufacture and use of the improved chimney cowl hereinbefore described
and illustrated in the accompanying drawing.
.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.