Improvements in Air Bricks.
Year: 1894

page_text: Date of Application, 23rd Feb., 1894
Complete Specification Left, 17th Nov., 1894--Accepted, 22nd Dec., 1894
Improvements in Air Bricks.
I ARTHUR ERNEST WYNN of The Cairn, Ripon Road Harrogate Hydropathic
Establishment Manager do hereby declare the nature of this invention to be as
follows: :-
An air brick to be built into a wall or used for all purposes to which an air brick
is put.
I construct mine so that the action of the wind blowing at the brick on the
outside, draws air out of the building or room in the wall of which my brick is
placed; it being impossible for wind to be blown in; thus it forms a perfect
ventilator. I do this by constructing the brick so that the air passage from
the room to the outside is crossed by a current of air whenever the wind blows at it,
and it thus draws a current of air from the room or apartment.
An air brick constructed in accordance with my invention consists of a hollow
rectangle, open at the back, and closed in towards the front by two inclined sides;
which however leave open a narrow vertical slit in the centre, where the inclined
sides if prolonged would meet. A short distance beyond these inclined sides in
front of them is a vertical wall, equal or nearly equal in area (i.e. in length and
height) to the longitudinal section of the brick. The top and bottom sides of the
brick extend to this front wall of the brick. The inclined sides and the front wall
of the brick thus enclose a longitudinal passage, open at the two ends, where the
passage is widest; the passage being narrowest in the middle opposite the vertical
slit.
The back of the brick being open to the room or apartment, any current of air
blowing against the brick can only produce a current in one direction or the other
through the before mentioned longitudinal passage, and thus draws or induces a
current of air outwards from the apartment through the before mentioned vertical
slit.
It will be understood that the air brick projects beyond the outer face of the wall
of the building, so as to expose the open ends of the before mentioned longitudinal
passage.
Dated this 22nd day of February 1894
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Air Bricks.
I ARTHUR ERNEST WYNN of The Cairn, Ripon Road, Harrogate, in the County
of York, Hydropathic Establishment Manager, 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 :-
My invention refers to a new design or construction of air brick, intended to
be built into the exterior wall of a room, or to be used for other purposes for
which such air bricks are employed. The object of my improved construction is to
cause an exhaust current out of the room through the brick, to be in luced by
Price dl

page_text: any current outside the building blowing against the outside of the air brick;
the construction being such that is also impossible for any outside current blowing
against the outside of the brick, to cause a current through the brick in the reverse
direction.
An air brick constructed in accordance with my invention consists of a hollow
rectangle open at the back, and closed.in towards the front by two inclined sides,
which however leave open a narrow slit in the centre, where the inclined sides if
prolonged would meet. A short distance beyond these inclined sides, in front of
them, is a vertical wall, equal or nearly equal in area (i.e. length and height) to the
longitudinal vertical section of the brick." The top and bottom sides of the brick
extend to this front wall of the brick. The inclined sides and the front, wall
of the brick thus enclose a longitudinal passage, open at the two ends, where the
passage is widest; the passage being narrowest in the middle opposite the internal
elit.
The back of the brick being open to the room or apartment, any current of
air blowing against the brick can only produce a current in one direction or the
other through the before-mentioned longitudinal passage, and thus draws or
induces a current of air outwards from the apartment through the vertical slit.
It will be understood that the air brick projects beyond the outer face of the
wall of the building, so as to expose the open ends of the before-mentioned
longitudinal passage.
And in order that my invention and the manner in which the same is to be
performed may be more readily and clearly understood, I have annexed hereto the
accompanying sheets of drawings in which
Fig. 1 is a perspective view of the brick seen from the back, i.e. from the side
placed towards the interior of the room,
Fig. 2 is a perspective view from the front or the outer side of the brick, and
Fig. 3 is a horizontal section of an air brick constructed in accordance with my
invention.
a a represents the exterior wall of a room, a being the inner side and a¹ the
exterior side of the wall.
bis the vertical slit of the brick, preferable formed with the side walls c diverging
apart towards the interior. d is the outer passage parallel to the wall of the
building, the said passage increasing in width from the centre towards each side
owing to the inclined positions of the side walls e. f is the front wall of the brick,
serving also to cover the exterior opening of the slit b, and thus to prevent any
inward current through the slit.
If desired my improved brick may be used as an inlet brick by reversing the
brick back for front.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is :-
1. The improved air brick substantially of the construction herein described,
and illustrated by the accompanying drawings.
2. An air brick provided with a vertical cross slit which communicates at
its outer end with a longitudinal passage preferably narrower at the centre where
it communicates with said slit, and wider at the two side exterior openings; the
exterior opening of the said vertical slit being protected from any direct air
current by the exterior wall of the longitudinal passage.
Dated this 16th dex of November 1801
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.