EXHAUST CHIMNEY TOP AND ROOF VENTILATOR
Year: 1884

page_text: I, ARTHUR CHARLES SMITH of 114 Wells Street, Camberwell in the County
of Surrey, Carpenter, do hereby declare the nature of my Invention for
EXHAUST CHIMNEY TOP AND ROOF VENTILATOR to be as follows:-
In carrying my Invention into effect, I provide a cylindrical or polygonal shape
tube, to form a head to be applied to the upper part of chimney or ventilating
shaft, the top of tube being diminished.
At equal distances round said tube, and near top or upper part, I provide a
number of long vertical openings or slits, and, if required, other vertical openings
at certain distances lower down the said tube.
When applied to ventilating shafts it is fixed concentric, and partly overlapping
so that a space is left between overlapping part of tube or head, and upper part of
ventilating shaft, the top of which is diminished. In order to guard the said
vertical openings so that the outter current of air may enter only in a direction
inclined round centre of head, I provide the right hand inside edge of said vertical
openings with narrow vertical guards, inclined in a direction to the left of common
centre. On the outter left hand edge of said vertical openings I provide vertical
guards, fixed parallel, to inside vertical guards, projecting outward, of sufficient
width and length to overlap, and extend a short distance above and below the said
vertical openings, and returned at an angle on vertical face, to tube or head, the
middle part of return face being left open. The said projecting vertical guards,
forming two faced angular projections on outter surface of head, with upper and
lower parts finished ornamental or otherwise, the middle part of return face left
open opposite each vertical opening in head. In the said openings, and extending
from return open face of projecting vertical-guards, through vertical openings and
a short distance into head, I provide a number of louvre guard plates of required
shape, fixed at equal distances, one above the other, horizontal to front openings
and sloping inward and upward. The object of the louvre guard plates is to guide
the outter current of air entering through the spaces between them into head in
an upward direction, and deflect rain, that of the angular projecting vertical guards,
is to guide the outter current of air entering left hand side of head in a direction
inclined round centre, but at the same time deflecting outter current of air on right
hand side of head. The two actions combined creating a powerful upward current
in a direction inclined round centre.
The above explained arrangement of vertical and horizontal guards, may if
desired, be reversed to opposite hand.
When used as a roof ventilator I provide a conical cap or covering, supported a
short distance above, with a depending band overlapping top or upper part of
head, but when used as a chimney top it may, or may not, have a cap or covering.
Dated this 10th day of January 1884

page_text: I ARTHUR CHARLES SMITH of 114 Wells Street Camberwell in the County
of Surrey, Carpenter, do hereby declare the nature of my Invention for EXHAUST
CHIMNEY TOP AND ROOF VENTILATOR and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The whirlwind exhaust chimney top and roof ventilator, is shewn by the annexed
Drawings of which Figure 1 is an elevation of chimney top, Figure 2 a vertical
section of same on line 2. 2. in Figure 3, which is a transverse section on line 1. 1,
in Figure 1, shewing positions of louvre and vertical guards or guides. The same
letters of reference indicating corresponding parts in all the Figures.
In carrying my Invention into effect I provide a cylindrical, polygonal, or other
shaped tube A, to form a head, to be applied to the upper part of chimney or
ventilating shaft, the top part of tube A, being diminished as shewn at B, in
Figures 1, and 2. At certain distances round tube A, and near top or upper part
I provide a number of vertical openings or slits shewn by dotted lines in Figure 3,
and if desired I may provide other vertical openings lower down the said tube A.
In order to guard the said vertical openings so that the outer current of air may
enter only in a direction inclined round centre of head; I provide the right hand
inside edge of said vertical openings with narrow vertical guards or guides C,
inclined in a direction to the left of common centre. On the left hand outer edge
of said vertical openings I provide other vertical guards D, which may be fixed
parallel or at such an angle to inside vertical guards or guides C, that the passage
between them converges towards interior of head. The said vertical guards D,
projecting outwards, of sufficient width and length to overlap or shield and extend
a short distance above and below the said vertical openinge, and returned at an
angle on vertical face to tube A, as shewn at D', the middle part of return face D¹,
being left open. The said projecting vertical guards D, and D', forming two faced
angular projections on outer surface of head, with upper and lower parts finished
ornamental or otherwise, the middle part of return face D¹, left open opposite each
vertical opening in tube A.
In the said openings and extending from return face D¹, of projecting vertical
guards D, through vertical openings in tube A, and a short distance into head I
insert a number of louvre guard plates E, of the required shape, fixed at equal
distances one above the other, horizontal to front openings and sloping inward and
upward. The aforesaid vertical openings which may be provided lower down
tube A, will be furnished with louvre and vertical guards in exactly the same
manner.
Inside tube A, and a short distance below the said louvre guard plates I insert
a conic ring B, Figure 2, and extend the vertical openings down to it.
The object of the louvre guard plates E, is to guide the outer current of air
entering through the spaces between them into head in an upward direction and
deflect rain, that of the angular projecting vertical guards D, is to guide the outer
current of air entering left hand side of head in a direction inclined round centre,
and to deflect it on right hand side of head, the two actions combined creating a
powerful upward current inclined in a direction round centre of head. The conic
ring B', Figure 2, is to prevent any down current that may escape the louvre guard
plates E, passing down main shaft by ejecting it through lower portion of vertical
openings in tube A, which are shielded by the lower parts of guards D, and D'.
The above explained arrangement of louvre and vertical guards may if desired
be reversed to opposite hand.

page_text: When used as a chimney top I may use a conical cap or a flat covering plate
ornamental or otherwise, supported by stays a short distance above the uppermost
part of head.
Figure 4 is an elevation of roof ventilator which is fixed concentric and over-
lapping top part of ventilating shaft F, which is diminished at top, as shewn by
dotted lines G, to prevent any rain that may be driven through louvres E, passing
down main shaft F. By releasing the screws H, the ventilator may be removed
for cleansing or other purposes. It is also provided with a conical or other shaped
cap I, supported by stays a short distance above, with a depending band J,
overlapping top or upper part of ventilator.
This Invention may also be used for soil pipes and general ventilating purposes,
and may be made in any suitable material.
I do not limit myself to the use of any stated number of openings, louvre guard
plates, or vertical guards, or, the slope of same, as they must be determined by
circumstances.
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 arrangement of louvre guard plates and vertical inner and outer guards
and guides, constructed as herein before described and shewn in the accompanying
Drawings.
2nd The whirlwind exhaust chimney top substantially as hereinbefore described
and shewn in Figures 1, 2, and 3, of Drawings.
3rd The whirlwind exhaust roof, soil pipe, and general ventilator, as hereinbefore
described and shewn in Figure 4 of Drawings.
-
Dated this 12th day of April 1884.
ARTHUR CHARLES SMITH.