Improvements in Chimney and Ventilating Cowls.
Year: 1886

page_text: Improvements in Chimney and Ventilating Cowls.
I ERNEST HOOPER SHORLAND of St. Gabriel's Works, Erskine Street, Manchester,
in the County of Lancaster, Warming and Ventilating Engineer, do hereby declare
the nature of this Invention to be as follows:--
My Invention relates to the Cowls or tops applied to the outlets of ventilating
shafts or of chimneys to prevent the entrance thereinto of rain and more parti-
cularly to check or prevent down draughts of the outer air the object of my
invention being to produce a cowl which whilst being simple in construction shall
have to some extent an exhaustive action so as to promote ventilation. The upper
air shaft in my improved cowl is preferably made square or rectangular in cross
section.
At each corner there is a long opening or slit for the discharge of air and inside
this opening is an angular shield. Outside each opening is a semi-circular shield
and lips extend from the sides of the opening some distance toward this shield.
In some cases I fix or form an angular deflector to or on each of the outer walls of
the shaft midway between the semi-circular shields, these deflectors improving the
action and adding to the ornamental appearance of the cowl. In a modification
I dispense with the inner angular shields and with the lips to the openings and
I substitute angular shields for the outer semi-circular shields the two sides of each
shield forming less than a right-angle with each other. The inner space of each of
these outer shields is partly filled up or crossed with a flat or curved plate or wall.
Dated the ninth day of February 1886.
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.

page_text: Improvements in Chimney and ventilating CoWIS.
1 ERNEST HOOPER SHORLAND of St. Gabriel's Works, Erskine Street, Manchester,
in the County of Lancaster, Warming and Ventilating 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 and
accompanying drawings:-
My Invention relates to the Cowls or tops applied to the outlets of ventilating
shafts or of chimneys to prevent the entrance thereinto of rain and more parti-
cularly to check or prevent down draughts of the outer air the object of my
invention being to produce a cowl which while being simple in construction shall
have to some extent an exhaustive action so as to promote ventilation. And in
order that my said invention may be properly understood I will now proceed to
describe the same with reference to the accompanying sheet of drawings in which
Fig. 1 is a side elevation and Fig. 2 a horizontal section of a cowl constructed in
accordance with my said invention and designed for application to the roof of a
building. In the said Figs. a. is the shell of the cowl bb are the inner shields and
cc the outer shields. The air passes upward into the cowl through the tube or
opening d. The air shaft a in the example is square in section and at each corner
is a long slit or opening c. these openings serving for the discharge of the air.
Within the said shell and behind the openings e are fixed the inner shields b which
are intended to baffle and prevent down draughts and outside of each opening is
an outer semi-circular shield c. The sides of the openings e have lips which extend
towards the said circular shields. When the cowl is in use the wind blows behind
or inside the shields c. and across the slits or openings e as indicated by the arrows
and has a drawing or inductive effect upon the air in the air shaft of the ventilator
and thereby creates an upward current of air from the part of the building with
which the air shaft is in communication. To improve the action of the cowl and
to add to its ornamental appearance I sometimes fix or form an angular deflector
to or on each of the outer walls of the air shaft-as indicated by the dotted lines
marked f. Fig. 3 is an elevation and Fig. 4 a horizontal section of a modified form
of the cowl illustrated by Figs. 1 and 2. In the said figures the inner shields bb
are dispensed with and the outer shields c. c are simplified in form. The cap or
topf of the cowl may be made of any suitable form and be made more or less
ornamental in any of the examples. Figs. 5 and 6 illustrate an example of
a ventilator cowl having a greater number of the openings ee the parts corre-
sponding with similar parts in Figs. 1 and 2 being marked with the same letters of
reference. Fig. 7 represents a chimney pot or smoke outlet constructed in
accordance with my invention the arrangement of the shields and openings being
supposed to be the same as or similar to the corresponding parts in the other
examples.

page_text: Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare
That I claim the appliances of the formation and construction substantially
as and for the purpose set forth and indicated hereinbefore and in and by the
accompanying drawings.
AU
T
T
1000
0
DUTTON & FULTON,
1, St. James Square, Manchester,
Agents.