Improvements in Ventilators.
Year: 1893

page_text: Date of Application, 29th Mar., 1893
Complete Specification Left, 29th Dec., 1893-Accepted, 17th Feb.,
1894
PROVISIONAL SPECIFICATION.
Improvements in Ventilators.
We, DAVID DONALD of 370, North Woodside Road and JOHN SIME of
61, Dale Street, Tradeston, both of Glasgow in the County of Lanark, North
Britain, Ventilating Engineers, do hereby declare the nature of this invention to
be as follows:-
This invention relates to improvements in self acting air exhaust ventilators.
When of round shape the construction is as follows. The main body of the
ventilator consists of a series of vertical louvres which are protected by an
outer arrangement of baffle plates. The wind acting against the said baffle plates
and over the louvres exhausts the foul air through the central shaft of the
ventilator. The top of the said vertical louvres is provided with a conical cap
with an air space between the cap and the louvres. The shape of the bottom of
the cap and the top of the louvres is preferably such that a sloping horizontal
passage is left between the cap and the top of the louvres, thus forming a horizontal
exhauster, whereas the vertical louvres form vertical exhausters; there is thus
provided a double arrangement of exhausters whereby greater efficiency is obtained.
The special construction of the vertical louvres may be as follows; A series of
inwardly curved plates, a pair of such being joined or formed together; between
the said double plates are pairs of deflecting plates, the arrangement being such
that as the air strikes the curved plates, it rushes over the deflecting plates so as to
cause an exhaust up the main shaft of the ventilator.
Dated this 28th day of March 1893.
J. Y. JOHNSON,
115, St. Vincent Street, Glasgow, Petitioners' Agent.
Improvements in Ventilators.
We, DAVID DONALD, of 370 North Woodside Road, and JOHN SIME, of
61 Dale Street, Tradeston, both of Glasgow, in the County of Lanark, North
Britain, Ventilating Engineers, 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 ventilators and is more particularly
applicable to self acting air exhaust ventilators.
In carrying out our invention we form or provide the ventilator with a number
of vertical deflecting louvres, guards, and baffle plates so arranged around the main
air shaft as to form a vertical exhauster. Above the said louvres, guards and
baffle plates and below the cap or top we form or provide an air space, in such a
manner, as to form a horizontal exhauster, the whole arrangement thus forming a
more efficient exhaust ventilator than hitherto.
But in order that our invention may be more readily understood and easily
carried into effect, we will proceed to describe the same with reference to the
accompanying drawings.
Figure 1 is a part sectional elevation Figure 2 a sectional plan on line 1, 2, and
Figure 3 a similar view on line, 3, 4, of a ventilator made in accordance with our

page_text: The main body of the ventilator is composed of a number of vertical deflecting
louvres A, guards B, and baffle plates C, to protect the outlet openings at a, prefer-
ably arranged and constructed as shown more particularly in Figure 3, that is to say,
the guards B are preferably formed of two inwardly curved plates which are joined
or formed together; between the said guards B we mount a pair of deflecting
louvres A, in such a manner, that on the external air rushing in at the openings b
of the ventilator and striking the curved guards B it then rushes over the deflecting
louvres A, creating a powerful up current, and so exhausting the foul or vitiated
air from the building, ship or other structure with which the ventilator is connected,
up the main shaft D of the ventilator and out through the openings a.
The top
of the ventilator is connected to the upper end of the body by means
of an arched framework E', Figures 1 and 2, in such a manner, as to leave a space
between the top of the body which is formed as a cone F and the bottom or lower
side of the top E thus forming a horizontal exhauster which assists the vertical
exhauster by means of the auxiliary air shaft G as shown.
The whole arrangement thus forms an efficient exhaust ventilator which has a
much greater outlet area than hitherto and offers no obstruction to the foul or
vitiated air rushing out immediately it ascends the main shaft; the said ventilator
acts both as a vertical and horizontal exhauster of the foul or vitiated air up
through and out of the main shaft G. The arrangement also forms a ventilator in
which blow downs of wind, rain, dust or the like are prevented to a much greater
extent than hitherto.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1st. The general arrangement construction and combination of the various parts
constituting our improvements in air exhausting ventilators, substantially as
and for the purposes hereinbéfore described and shown in the accompanying
drawings.
2nd. In air exhausting ventilators, the arrangements of the vertical deflecting
louvres A, guards B and baffle plates C, substantially as and for the purposes,
herein before described and shown in Figures 1 and 3 of the accompanying
drawings.
3rd. In air exhausting ventilators, the arrangement and combination with
the vertical exhauster, of the upper or horizontal exhauster, substantially as
herein before described and shown in Figures 1 and 2 of the accompanying
drawings.
Dated this 28th day of December 1893.
J. Y. JOHNSON,
115, St. Vincent Street, Glasgow, Applicants' Agent.