AN IMPROVED VENTILATOR
Year: 1884

page_text: I WILLIAM COWELL of number 81 Northgate, Blackburn, in the county of
Lancaster, Draper, do hereby declare the nature of my Invention for "AN
IMPROVED VENTILATOR" to be as follows:-
The object of my invention is to construct a simple, efficient, and inexpensive
ventilator, which whilst admitting the required air to rooms and buildings "keeps
out the moisture and damp. I construct my improved ventilator of box like form,
open in the inside but the outside is in the form of a flap or vane, or two or more
flaps or vanes placed at an angle, the bottom of each flap or vane hangs below the
top of the next flap or vane and the bottom flap or vane passes below the bottom
of the box of the ventilator, and so whilst admitting air excludes all rain and
moisture; The ventilator also if placed towards the top of a room will allow the.
hot air, and gases to escane.
$

page_text: I WILLIAM COWELL of 81 Northgate Blackburn in the county of Lancaster,
Draper do hereby declare the nature of my Invention for AN IMPROVED VENTILATOR
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of my invention is to construct a simple efficient, and inexpensive 5
ventilator, which whilst admitting the required air to rooms and buildings, keeps
out the moisture and damp I construct my improved ventilator of an oblong or
box like form, open in the inside but the outside is formed of flips or vanes placed
at an angle, the bottom of each flap or vane, hangs below the top of the next vane,
and the bottom flap or vane passes below the bottom of the box or ventilator,
and so whilst admitting air, excludes all rain and moisture, the ventilator, also if
placed towards the top of a room will allow the hot air and gases to escape.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation of my improved ventilator shewing four vanes.
Fig. 2 is an end elevation in section of Fig. 1.
Fig. 3 is a perspective view of a two vane ventilator.
Fig. 4 is a perspective view of a four vane ventilator.
My improved ventilator consists of a box like form A, open towards the back to
the front are vanes or flaps B, with air spaces O, between each vane or flap, the
flaps or vanes are at an angle, and the bottom of each vane or flap projects below
the top of the next lower vane or flap, and the bottom flap passes below the bottom
of the box or frame of the ventilator, and so whilst admitting cold air, or allowing
the escape of warm air, excludes all rain and moisture the ventilators are made in
metal or earthenware, and are used for cellars, and other walls of buildings, outside
or in, for outer walls they are invaluable, as it is impossible for the rain to be
driven in, and there is also a much stronger ventilation or indraught of fresh air,
also by placing them near the ceiling they will carry off the hot and foul air.
I do not limit myself to any particular size, or outward form of the ventilator, or
or to the number of flaps or vanes.
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 :-
Wall ventilators with vanes or flaps, having the over lap, the bottom vane over-
lapping the bottom of the box or frame, of the ventilator as and for the purposes
shewn and described.
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