Year: 1897

page_text: Date of Application, 17th Mar., 1897
Complete Specification Left, 25th Nov., 1897-Accepted, 15th Jan., 1898
J
I, JAMES CARRICK, of 20 Wilton Gardens, in the City of Glasgow, Sanitary
Engineer, do hereby declare the nature of this Invention to be as follows:-
This Invention has for its object to provide improved means in connection with
greenhouses or conservatories and plant cases for supplying them with pure fresh
air for ventilating purposes and for humidifying the atmosphere therein.
To that end I form ventilating orifices in the top and bottom parts of the
structure or in the ends of ducts or channels leading thereinto and terminate
said orifices in rims, beads or flanges over which I stretch, by preference hori-
zontally, open netting or like fabric preferably of loose wollen texture. The
edges of the netting are made to overlap the rim and dip into a water trough
surrounding each orifice so that by capillary action the fabric becomes wet or
moist and presents a moistened surface to the air entering the orifice which while
allowing the air to pass freely and humidifying it as it enters serves to arrest
particles of dust or soot and thus purifies the inflowing air. The troughs surround-
ing the ventilating orifices may extend more or less across the length and breadth
of the top and bottom parts of the plant cases, and the upper trough or troughs
may be continuously or intermittently supplied with water whilst an overflow
pipe may be provided to remove superfluous water from the lower trough or
troughs. By stretching the netted fabric across the orifices so that it sags slightly
the water raised by capillary action over the rims or flanges of the orifices is
caused to drip from the fabric so that water is constantly drawn from the upper
troughs and delivered to the lower troughs and in this way constant circulation
of the water in them is maintained.

page_text: same is to be performed, to be particularly described and ascertained in and by the
following statement:-
This Invention has for its object to provide improved means in connection with
greenhouses or conservatories and plant cases for supplying them with pure fresh
air for ventilating purposes and for humidifying the atmosphere therein.
The Invention is illustrated by the accompanying drawings, Fig. 1 being a
longitudinal vertical section and Fig. 2 a transverse vertical section of a plant
case as constructed under my Invention, and Figs. 3 and 4 are transverse vertical
sections of two forms of greenhouses or conservatories with the Invention applied
thereto.
In carrying out the Invention I form ventilating orifices A, B, in the top and
bottom parts of the structure C or in the ends of ducts or channels 1) leading
thereinto, and terminate said orifices in rims, beads or flanges over which I
stretch, by preference horizontally, open netting or like fabric E preferably of
loose woollen texture. The edges of the netting are made to overlap the rim
and dip into a water trough F surrounding each orifice so that by capillary action
the fabric E becomes wet or moist and presents a moistened surface to the air
entering the orifice which while allowing the air to pass freely and humidifying
it as it enters serves to arrest particles of dust or soot and thus purifies the in-
'flowing air. The troughs surrounding the ventilating orifices may extend
*more or less across the length and breadth of the top and bottom parts of the
plant cases, or across the entire length of the hot pipes in greenhouses as shown
at G, Figs. 3 and 4, and the upper trough or troughs may be continuously or
intermittently supplied with water whilst an over-flow pipe may be provided to
remove superfluous water from the lower trough or troughs. By stretching the
netted fabric across the orifices so that it sags slightly the water raised by
capillary action over the rims or flanges of the orifices is caused to drip from the
fabric so that water is constantly drawn from the upper troughs and delivered
to the lower troughs and in this way constant circulation of the water in them
is maintained.
In the case of greenhouses or conservatories the air is admitted at the ends
and travels alongside the pipes, passing upwards through the lower screen thereby
humidifying the air, and finally passing out by way of the upper screen through
the lantern, as shewn at Fig. 3, or through ventilating pipes, as shewn at Fig. 4,
situated in the roof of the structure.
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:
―:
In plant cases, greenhouses or like structures the arrangement in connection
with the ventilating orifices of screens composed of netting or like fabric
stretched over the air circulating passages and drawing water from surrounding
troughs in order to humidify and purify the air circulated through the structure
substantially as described.