Improvements in Chimney Shafts, Ventilators, and the like.
Year: 1894

page_text: Date of Application;. 7th Nov., 1894'
Complete Specification Left; 7th Aug., 1895-Accepted, 7th Sept., 1895.
PROVISIONAL SPECIFICATION.
Improvements in Chimney Shafts, Ventilators, and the like.
I, JOHN RAE, of 6 Brandon Street; Hamilton, in the County of Lanark,
North Britain, Ironmonger; do hereby declare the nature of this invention to be
as follows:-
This invention relates to improvements in. chimney shafts ;. or ventilators and
the like for house, ship or drain ventilation and has for its object to prevent down
draught and to increase the up draught. In accordance with my invention the
shaft may be cylindrical with the top fitted with four vertical division plates inside
the shaft, at right angles to each other. Inside the shaft at say four or five inches
below the division plates I mount an inverted cone somewhat less in diameter than
the diameter of the. shaft.. The upper part of the said division plates projects
from the top of the shaft to the extent of preferably about.that of one half of the
diameter of the. shaft. The air striking the division plates at the one side thereof,
is led down the shaft until it strikes the hollow of the inverted 'cone. From thence
the air is deflected 'from the opposite side of the cone and up the shaft at the other
side of the division plates. An up draught is thus created whilst the down draught
is prevented?
An opening is left around the main shaft at the part where the vertical' cone is
located, the said opening being surrounded by a guard plate which is open at top
and bottom,, (but the top opening may have a guard a little above it) the said
arrangement being for the purpose of allowing. inore free dispersion for the:
products to be exhausted whether it is smoke or foul air, and the said arrange
ment also allowing the top arrangement of the division plates more free play.
There may be a conical or other top over the division plates to assist the action
and also to check a violent gust of wind.
Whether such ventilators are used for buildings, ships, or drains they have for
their object to prevent down draught and increase up draught:
Dated this 6th day of November 1894.
JOHNSONS,
115 St: Vincent. Street, Glasgow, Petitioner's Agents.
Improvements in. Chimney Shafts, Ventilators, and the like.
I, JOHN RAE, of 6 Brandon Street, Hamiltou, in the County of Lanark,
North Britain, Ironmonger, 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 shafts, or ventilators and the
like for house, ship or drain ventilation and has for its object to prevent down
draught and to increase the up draught.

page_text: In carrying out my said invention as applied to a ventilator for a house or the
like I proceed as follows, and as is shewn in elevation and section Figures 1 and 2
of the accompanying drawings:
The shaft A (which may be of a round, square or other shape in section) has
fitted within it four vertical division plates B at right angles to each other. Inside
the shaft A at say four or five inches below the division plates B I mount an
inverted cone C somewhat less in diameter than the diameter of the shaft A.
said cone may be mounted higher or lower as desired.
The
The upper part of the said division plates B projects from the top of the shaft A
to the extent of preferably about that of one half of the diameter of the shaft A.
The air striking the division plates B at the one side thereof, is led down the
shaft A until it strikes the hollow of the inverted cone C. From thence the air is
deflected from the opposite side of the cone and up the shaft A at the other side
of the division plates B. An up-draught is thus created whilst the down-draught
is prevented.
An opening is left around the main shaft A at the part D where the inverted
cone C is located, the said opening D being surrounded by a guard plate E which
is open at top and bottom, and having a guard F. a little above it, the said arrange-
ment being for the purpose of allowing more free dispersing for the products to
to be exhausted, whether it is smoke or foul air, and the said arrangement also
allowing the top arrangement of the division plates B more free play.
There may be a copical or other cap G over the division plates B to assist the
action and also to check a violent gust of wind, and also if desired I may form
one or more openings 6 near the top ends of the division plates B so as to lessen
the force of the wind. Also if desired I may provide a wire gauze or other
perforated covering for the top end of the air shaft.
Whether such chimney shafts or ventilators are used for buildings, ships, or
drains they have for their object to prevent a down draught and increase the up-
draught.
Having now particularly described my invention and in what manner the same is
to be performed I may state that what I claim is :-
1st. The general arrangement, combination and construction of the various
parts constituting my improvements in chimney shafts, ventilators and the like
all substantially as and for the purposes hereinbefore described and shewn in the
accompanying drawings.
2nd. In chimney shafts, ventilators and the like, the arrangement by which the
shaft A is provided with the vertical division plates B at right angles to each other
and having the inverted cone C with guard E and cover F, whereby a down
draught is prevented and the up draught is increased, substantially as hereinbefore
described and shewn in the accompanying drawings.
Dated this 6th day of August 1895.
JOHNSONS,
115 St. Vincent Street, Glasgow, Applicant's Agents.