Improvements in Ventilators or Cowls.
Year: 1891

page_text: Date of Application, 13th Nov., 1891
Complete Specification Left, 13th Sept.. 1892-4ccepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Ventilators or Cowls.
ARTHUR JEPHSON BOND 119 Queen Victoria Street London E.C. Agent
do hereby declare the nature of this invention to be as follows:-
It relating to ventilators or cowls in which stationary deflecting plates are
employed and consists of the following arrangement. The uptake or passage for
foul air from the place to be ventilated to the ventilator, or such sub-division of the
said uptake or passage, has the following arrangement of deflecting plates applied
at the part thereof leading to the external air. A circular internal deflecting plate
is arranged on a central line which would bisect an angle of 90° and on both sides
thereof from extremeties of said angle are arranged plates at angles which extend
towards circular internal deflecting plate but do not connect with it, and so leave
spaces between the inner extremeties of the said plates and the said circular internal
deflecting plate for the passage of the foul air away from the room or other place.
Opposite these said spaces a protecting plate is arranged extending each way a
considerable distance beyond such spaces for the purpose of guarding them &
forming a chamber thro' which the external air is deflected by the outer extremeties
of inner plates at angles and such air in passing over the spaces between circular
internal deflecting plate and plates at angles creates a vacuum at the head of the
shaft or each sub-division of the shaft, which vacuum being filled from the lower
volume of air a continual & powerful upcurrent is established, while at the same
time the external air is deflected away from the outer side of the inner plates at
angles & circular internal deflecting plate, towards the inner surface of protecting
plate and so prevent air from passing down the shaft, also by this deflection greater
freedom of egress is allowed from the shaft and the extraction of the foul air is
made correspondingly more efficient. Water is also by such arrangement prevented.
from entering the shaft and a deep rim to the said shaft gives additional security
making the ventilators absolutely waterproof.
In the ventilating arrangements herebefore described the various plates and
guards will be arranged in vertical, horizontal, or other positions according to the
direction of the air currents and there may be one or any number of such arrange-
ments combined together. They may be arranged as turret, ridge, invisible roof,
louvre or chimney terminal ventilators or cowls or in any other form to which they
are, or may be, adopted.
Dated this 12th day of November 1891.
ARTHUR JEPHSON BOND,
119, Queen Victoria Street, E.C.
COMPLETE SPECIFICATION.
Improvements in Ventilators or Cowls.
1, ARTHUR JEPHSON BOND of 119 Queen Victoria Street, London, E.C., Agent
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 or cowls in which stationary deflecting plates
are employed and consists of the following arrangement. The uptake or passage
for foul air from the place to be ventilated to the ventilator, cr each subdivision of
the said uptake or passage if it be sub-divided has the following arrangement of
detecting plates applied at the part thereof leading to the external air.

page_text: For the purpose of description I presume the invention to be applied to a
ventilator or cowl with four openings although I do not of course limit myself to
that number. A circular or approximately circular internal deflecting plate
(hereinafter referred to as a rod or tube) is arranged on a line which would bisect
a radial line say at an angle of 90° and on both sides thereof are arranged plates
at angles which extend towards the circular internal deflecting plate but do not
connect with it, and so leave spaces between the inner extremities of the said plates
and the said circular internal deflecting plate for the passage of the foul air away
from the room or other place. Opposite these said spaces a protecting plate
(hereinafter referred to as a shield) is arranged extending each way a considerable
distance beyond such spaces for the purpose of guarding them and forming a
chamber through which the external air is deflected by the outer extremities of
inner plates at angles and such air in passing over the spaces between the circular
internal deflecting plate and the plates at angles as aforesaid creates a vacuum at
the head of the shaft or each subdivision of the shaft, which vacuum being filled
from the lower volume of air a continual and powerful up current is established
while at the same time the external air is deflected away from the outer side of the
inner plates at angles as aforesaid and circular internal deflecting plate, towards
the inner surface of protecting or guard plate and so prevent air from passing down
the shaft. By this deflection great freedom of egress is allowed from the shaft
Water
and the extraction of the foul air is made correspondingly more efficient.
is also by such arrangement prevented from entering the shaft and a deep rim may
be used around the said shaft to give additional security making the ventilators
absolutely safe against the ingress of water. In the ventilating arrangements
hereinbefore described the various plates and guards will be arranged in vertical,
horizontal, or other positions according to the direction of the air currents and
there may be one or any number of such arrangements combined together. They
may be arranged as turret ridge, invisible roof, louvre, or chimney terminal
ventilators or cowls or in any other form to which they are or may be adapted.
The accompanying drawing represents a ventilator constructed according to this
invention as applied to what is known as a "turret ventilator" but the invention
may of course be applied to ventilators in other forms.
Figure 1 is an elevation. Figure 2 is a vertical section and Figure 3 is a
horizontal section.
A are the openings by which the external air in motion passes. Before each
opening there is an angular piece B shaped and situated relatively to the opening
as shown clearly in Figure 3. There is a space
between the sides of each of the
adjacent pieces B and in front of each such space is a guard G. In each such
space is situated a circular or approximately circular rod or tube F which leaves an
opening (D D) between the sides of the said rod or tube and the outwardly bent
ends of the pieces B. The air which has entered by the openings A in passing
over the openings D creates a partial vacuum in the central chamber tube or
upcast shaft E which must be filled by air from the building or apartment with
which the ventilator is connected and so a natural and constant exhaust is created
which in conjunction with any suitable and adequate and properly arranged
admission of fresh air into the building or apartment constantly changes the
atmosphere therein without any tendency to injurious draught.
The tubes or rods F owing to their form and placement act very efficiently to
deflect the external air away from the openings D so as to allow the free egress of
the air from the chamber Ĕ of the ventilator. These tubes or rods are a special
feature of the ventilator. They minimise friction and obviate whistling noise so
generally complained of in ventilators due to angles at this part of the ventilator.
The space between opening D and central shaft receives any water and allows it
to run off especially when the ventilators are fixed on ship board.
Although I have shewn a ventilator with four arrangements of openings and
plates and their adjuncts it is to be understood that any required number may be
employed.

page_text: 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. In ventilators the combination with guarded openings such as D of circular
or approximately circular rods or tubes F arranged substantially as and for the
purpose hereinbefore described.
2. In ventilators the combination with an opening for external air of the plates B
angled and situated relatively to the said openings substantially as hereinbefore
described.
3. A. ventilator arranged or constructed substantially as hereinbefore described
and shewn in the accompanying drawing.
Dated this 13th day of September 1809
J. H. JOHNSON & Co.,
Agents.