Improvements in and relating to Ventilators.
Year: 1895

page_text: Date of Application, 4th July, 1895
Complete Specification Left, 2nd Apr., 1896-Accepted, 16th May, 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Ventilators.
I, WILLIAM NICOL of 55 Albert Road, Crosshill, in the County of the City of
Glasgow, Joiner, do hereby declare the nature of my invention to be as
follows:-
This invention has reference to improvements in the construction of ventilators
such as the revolving or fixed hoods used for uptake draughts on the tops of
buildings, and the down take cowls used on board ship and the like.
This would be
Under one arrangement of my improvements the hood. or cowl would be formed
all in one piece out of sheet steel or other suitable sheet metal.
effected by taking a piece of the sheet metal of a suitable size and slitting it up at
distances apart along the one side, to form a series of parallel strips at the
centre part.
While the opposite side of the piece of metal would be cut
out and shaped corresponding to that to be given to the mouth of the hood.
That is it may be cut to a crescent or like shape at the centre part and taper
away to have two free ends, so that in constructing the hood these two free ends
are brought to overlap each other and be secured by rivets or otherwise and so
form the mouth of cowl of a crescent or jaw shape; or if made of a circular shape,
a strap of metal would overlap the under surface of ring part and the two ends.
The two ends of the other side of metal piece would be similarly bent round to
overlap each other and be secured by rivets, solder or other fastenings; and the
series of strips which would form the back of the head of the hood would he bent
round for their free ends to converge towards a point and the whole be secured by
rivets or other fastenings. Instead of having a series of split strips the centre.
body may be only slit in one part, so that the two parts may be bent round to
overlap each other in forming the hood and to form a projecting part behind
opening. Or a piece may be cut away at the part where the slits were proposed to
be formed, and when the ventilator is formed into shape an open space would result
behind the hood which could be covered by a separate piece blocked on to overlap
the hole. A series of projecting feathers or ribs would or may be secured on inside
surface of hood, such as by forming them of L shape and rivetting them to hood,
for the purpose of deflecting the updraught air currents.
By a modified arrangement a crescent or segmental piece of the sheet metal would
be cut and bent inwards or outwards at back of hood, and to this and the sides
would be rivetted or attached a plate of metal with flanged sides, set at an angle
and carrying a series of vertical feathers or ribs rivetted to it so that the wind
or air will be gathered and deflected upwards into the ventilator and so induce an
uptake suction in ventilator shaft. This plate may be either hinged, or made to
slide adjustably. The leg or cylinder over which the ventilator is mounted would'
or may also be fitted with vertical ribs round its outer surface to induce an upward
suction action.
In applying the projecting ribs to downtake cowls, the back of hood would be
closed and the angled plate carrying the ribs be placed through mouth of cowl so as to
gather and induce air inwards, and then deflect it downwards through shaft.
Suitable devices may be applied for trapping and running away water. By a
modified arrangement the jaws or mouth of cowl would be formed in two separate
parts hinged together so that the top part can be swivelled upwards or downwards.

page_text: to open or close and so be convertible into an uptake ventilator or down-draught
ventilating cowl; and deflecting feathers may be fitted on both jaws to act as wind
gatherers or guides or draught inducers.
the 2nd dow of T₁l, 1805
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.
Improvements in and relating to Ventilators.
1, WILLIAM NICOL, of 55 Albert Road, Crosshill, in the County of the City of
Glasgow, Joiner, do hereby declare the nature of my invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement in writing that is to say :-
This invention has reference to improvements in the construction of ventilators,
such as the revolving or fixed hoods used for uptake draughts on the top of
buildings, and the down take cowls used on board ship and the like.
And in order that my said invention and the manner of performing or carrying
same into practice may be properly understood, I have hereunto appended an
explanatory sheet of drawings in which the same reference letters are used to
indicate corresponding parts in all the figures where shown.
Figure 1 is a back perspective elevation of an uptake ventilator as constructed
in accordance with one arrangement of my improvements, and Figure 2 is a view
of the sheet metal spread out from which the ventilator shown in Figure 1 is
formed.
Figure 3 and 4 and 5 and 6 are views corresponding to Figures 1 and 2
respectively of slightly modified constructions of my uptake ventilator, and
Figure 7 is a front view of Figure 5.
Figures 8 and 9 are a sectional side and a front view respectively of a downtake
ventilator as constructed in accordance with my improvements, and Figure 10 is a
front view of a circular mouth form of cowl as fitted with ribs in accordance with
my improvements.
Figures 11 and 12 are views at right angles of a convertible uptake and downtake
ventilator as constructed in accordance with my improvements; an 1 Figure 13 is a
view corresponding to Figure 11 of a modification of downtake cowl.
Figure 14 is a view showing how to produce an uptake draught from a fire place
in a curved or bent shaft; and Figure 15 is a similar view showing how to produce
an uptake from ceiling or a downtake from shaft.
Referring to these drawings :-Under one arrangement of my improvements as
shown in Figures 1 and 2 the hood or cowl A would be formed all in one piece out
of sheet steel or other suitable sheet metal. This would be effected by taking a
piece of the sheet metal of a suitable size and slitting it up at distances apart along
While the
the one side to form a series of parallel strips a at the centre part.
opposite side of the piece of metal would be cut out and shaped corresponding to
that to be given to the mouth of the hood. That is, it may be cut to a crescent or
like shape at the centre part A' and taper away to have two free ends a' a' so that
in constructing the hood these two free ends a' are brought to overlap each other
and be secured by rivets or otherwise and so form the mouth of cowl of a crescent
or jaw shape, or if made of a circular shape, a strap of metal would overlap the
under surface of ring part and the two ends. The two ends a² of the other side of
metal piece would be similarly bent round to overlap each other and be secured by
rivets, solder or other fastenings, and the series of strips a which would form the
back of the head of the hood would be bent round for their free ends to converge
towards a point and the whole be secured by rivets or other fastenings.
Instead

page_text: of having a series of split strips a the centre body may be only slit in one part, so
that the two parts may be bent round to overlap each other in forming the hood
and form a projecting part behind opening. Or a piece may be cut away at the
part where the slits a were proposed to be formed and when the ventilator is formed :
into shape an open space would result behind the hood which coull be covered by
a separate piece at a blocked on to overlap the hole. A series of projecting
feathers or ribs 6 would or may be secured on inside surface of hood as shown
in Figures 8 to 13 such as by forming them of shape and rivetting them to hood,.
for the purpose of deflecting the up draught air currents.
By a modified arrangement, as shown particularly in Figures 3 and 4, a crescent
or segmental piece of the sheet metal would be cut at A' and bent inwards or
outwards at back of hood, and to this and the sides would be rivetted or attached a
plate B of metal with flanged sides B₁ set at an angle and carrying a series of
vertical feathers or ribs B2 rivetted to it so that the wind or air will be gathered
and deflected upwards into the ventilator and so induce an uptake suction in.
ventilator shaft. This plate B may be either fixed; hinged, or made to slide
adjustably and side wing feathers B³ may be fitted as shown in Figures 5 and 7.
The leg or cylinder C over which the ventilator A is mounted, as shown
in Figures 1 and 7, would or may also be fitted with vertical ribs C¹ round its outer
surface to induce an upward suction action, and the lower back part of cowl A
would preferably project out to enable currents of air to pass up below it.
J
In applying the projecting ribs to down-take cowls, as shown in Figures 8, 9.
and 10, the back of hood would be closed and the angled plate B carrying the
ribs B2, as shown in Figures 8 and 9, be placed through mouth of cowl so as to
gather and induce air inwards, and then deflect it downwards through shaft; and
separate deflecting angled plates B with a plain surface may be fitted in the mouth
of uptake cowls as shown in Figures 1, 3, 5 and 7; and side wing feathers B³ may-
be fitted as shown in Figures 5 and 7.
By a modified arrangement as shown in Figures 11 and 12 the jaws or mouth of
cowl would be formed in two separate parts A, A³ hinged together at a* so that the
top part A³ can be swivelled upwards or downwards to open or close and so be
convertible into an uptake ventilator as shown in dotted lines or into a down.
draught ventilating cowl as shown in full lines Figure 11, a supporting hinged
rod A being fitted at end for the open position; and deflecting feathers b may be -
fitted on both jaws to act as wind gatherers, or guides, or draught inducers.
In the arrangement of down-take cowl shown in Figure 13 the part AⓇ acts as an
auxiliary wind gatherer and is secured by a sliding or hinge pin a' at front end of
cowl A and is stayed by the rod A, and flap doors A³ may be hinged at front of
cowl. As shown in this figure slits are formed at a' for running away any
accumulated or trapped water from cowl.
In Figure 14 is shown a series of sectional conoidal cylinders D jointed together.
at D' to form a suction draught from a curved or bent fireplace to ventilating
shaft; and in Figure 15 is shown a series of connected cones D to act as an uptake.
from the ceiling of a room to ventilating shaft while these would act as air spreaders.
when the ventilator is fitted as a downtake air deflector.
Having now particularly described and ascertained the nature of my said.
invention and in what manner the same is to be performed I declare that what I.
claim is :-
1. The constructing of ventilators in the improved manner herein described, in
reference to and shown in the accompanying drawings.
2. The constructing of ventilators out of one piece of sheet steel or other-
suitable sheet metal, substantially as herein set forth.
3. In ventilators, the fitting of an angled plate carrying a series of feathers or
ribs, substantially as and for the purposes herein set forth.
4. In ventilators the fitting of angled plates at the mouth of cowl substantially-
as herein set forth.

page_text: 5. In ventilators, the fitting of projecting feathers or ribs on their inside throat
surface, substantially as and for the purposes set forth.
6. The constructing of convertible uptake and downtake ventilators, substantially
as and in the manner herein set forth.
Dated this 1st day of April 1896.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.