Improvements in Ventilators.
Year: 1891

page_text: Date of Application, 5th Dec., 1891
Complete Specification Left, 2nd Jan., 1892-Accepted, 6th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Ventilators.
I ROBERT BOYLE of the firm of Robert Boyle & Son Limited of 64 Holborn
Viaduct in the City of London Ventilating Engineers do hereby declare the nature
of the said invention to be as follows:-
This invention relates to ventilators wherein the outlet from the ventilating
shaft is provided with openings so arranged that currents of external air or wind
cause an exhausting action at the said openings. In such ventilators as hitherto
constructed when made of thin metal there has been frequently an objectionable
vibration and noise due to the currents of air or wind striking the edges of the
metal. There has also been liability of rain or snow entering the openings. The
main object of my invention is to remedy these defects and with this object I
arrange surfaces in juxta position to the openings so that the edges of the metal
are protected from direct impact of the wind or air currents and so noise is
obviated. The said surfaces also are arranged to direct the air currents or wind so
that snow or rain is not carried into the openings and a better air suction through
the openings from the ventilating shaft is obtained. The shielding surfaces may
consist of simple strips or of compound strips or solid pieces with sides angled or
curved to direct the air currents or wind past and not into the said openings.
They may be in the form of tubes (preferably of lozenge or diamond shape) in
communication with the ventilating shaft and with shielded openings at their side
or sides so that these tubes act as auxiliary exhausters of foul air from the shaft.
Dated this 5th day of December 1891.
J. H. JOHNSON & Co..
47, Lincoln's Inn Fields, Lonlon, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Ventilators.
I, ROBERT BOYLE of the firm of Robert Boyle & Son Limited, of 64 Holborn
Viaduct in the City of London, 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 ventilators wherein the outlet from the ventilating shaft
is provided with openings so arranged that currents of external air or wind cause
an exhausting action at the said openings. In such ventilators as hitherto con-
structed when made of thin metal there has been frequently an objectionable
vibration and noise due to the currents of air or wind striking the edges of the
metal. There has also been liability of rain or snow entering the openings. The
main object of my invention is to remedy these defects and with this object I
arrange surfaces in juxta position to the openings, so that the edges of the metal
are protected from direct impact of the wind or air currents, and so noise is
obviated. The said surfaces also are arranged to direct the air currents or wind so
that snow or rain is not carried into the openings and a better air suction through
the openings from the ventilating shaft is obtained. The shielding surfaces may
consist of simple strips, or of compound strips or solid pieces with sides angled or
curved to direct the air currents or wind past, and not into the said openings.
They may be in the form of tubes (preferably of lozenge or diamond shape) in
communication with the ventilating shaft, and with shielded openings at their
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page_text: side or sides so that these tubes act as auxiliary exhausters of foul air from the
shaft.
The accompanying drawings illustrate ventilators constructed according to
my invention but I do not limit myself to the precise details of the constructions
as illustrated.
Figure 1 is an elevation and Figure 2 is a sectional plan showing a ventilator
placed at the top of a ventilating shaft or over an opening from which air is to be
drawn.
It is shewn as having four arrangements of the plates as hereinafter described
the said plates being in a vertical position, but I may use one or any other number
in a vertical or any other position as may be desired. A is the top or cap, and
B is the bottom plate of the ventilator. a are V shaped inner deflecting plates
arranged at each opening formed by the plates b, which are curved as shewn
leaving spaces between the plates a and b for the exit of foul air from the shaft.
Opposite to each pair of these spaces, the plate c is arranged.
dare the plates which are arranged before the spaces, between the plates a and b
as aforesaid to protect the edges of the metal thereof from direct external air
currents and prevent noise. The said external air currents take the course indicated
by the arrows, and whilst exerting a powerful suction to withdraw the foul air do
not carry rain or snow into the said openings. The plates d are shewn in Figure 3
as being of diamond shape in cross section, but they may be arranged in any other
shape which will afford an analogous protection of the spaces between the plates a
and b. For instance Figure 4 shews them of somewhat oval shape. When they
are made of hollow or tubular formation, I may cause them to act as auxiliary
exhausters, by making them open at their lower ends into the ventilating shaft or
space to be exhausted. This arrangement is shewn in vertical and horizontal
sections respectively in Figures 5 and 6, In this case I provide openings in their
sides or in one of their sides as shewn at f, so as to cause the external air passing
before them to extract foul air from the place to be ventilated up these tubes.
The openings are preferably shielded by plates as at g, and they may be further
protected by plates h as in Figure 7, which shews openings and plates at each
side of the tube d. In a similar manner either of the other plates which it may be
convenient to so construct may be made as tubes to act similarly as auxiliary
exhausters. In Figure 8 I shew the plate c as being made as such a tube by the
addition of the plate having therein the opening shielded by the plate g.
The tube constituted by cc, communicates with the space to be ventilated.
In Figure 9 I have shewn a shielding plate i, situated between the plates a and g.
Having now particularly described and ascertained the nature of my said inveu-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In ventilators, the combination of plates a b and c with the protecting
shields plates or tubes d arranged substantially as and for the purposes hereinbefore
described.
2. In ventilators the combination with the ordinary ventilating openings of
protecting shielding or deflecting surfaces, constituted by tubes arranged to act as
auxiliary exhausters, substantially as hereinbefore described.
3. The several ventilators, constructed as herein before described and shewn
respectively in the several figures of the accompanying drawings.
Dated the 2nd day of January 1892.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.