IMPROVED APPARATUS FOR PRODUCING UPCAST DRAUGHT IN VENTILATION
Year: 1885

page_text: Ventilation.
I, SAMPSON Low Junior BA. Cantab of N° 11 Holborn Circus in the County
of Middlesex, Sanitary Engineer, Fellow of the Meteorological Society do hereby
declare the nature of my invention for "IMPROVED APPARATUS FOR PRODUCING
UPCAST DRAUGHT IN VENTILATION" to be as follows
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My invention relates to an apparatus for producing upcast draught in ventilation,
the construction of which will be readily understood on reference to the accom-
panying drawing, which shews a vertical section of the apparatus To the mouth
of the upcast shaft A is fixed the dome-shaped chamber or windchest B and above
this is the curved cap C carried by supports from B The outer casing of the
windchest B is formed as part of a sphere having one fourth of the circle removed
at bottom where it is closed at the conical part B¹ while at top it is formed with
an opening
The shape of the windchest and the position of the cap C relative thereto are
such that at whatever angle the wind strikes the apparatus, a partial vacuum is
produced in the wind chest, thus inducing an upward current in the shaft A
In some cases I produce an intensified draught by the application of inclined
tubes to the windchest as shewn in dotted lines at F, through which the wind
enters, thereby producing upwardly directed jets of air in the windchest In the
interior of the windchest is placed a water baffler D, which, in the event of the
sea breaking over the ship on which the apparatus is fixed, prevents any water
that may find its way between the windchest and the cap, from falling down the
shaft A, the water being deflected to the circumference of the windchest, whence
it escapes through small apertures at E
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, WC

page_text: Ventilation.
I SAMPSON LOW Jun BA Cantab of 41 Mecklenburgh Sq in the County of
Middlesex, Fellow of the Royal Meteorological Society 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
-
My invention relates to an apparatus for producing upcast draught in ventilation,
the construction of the said invention will be readily understood on reference to
the accompanying drawings
To the mouth of the shaft A, 18 fixed the dome shaped chamber or wind chest B
Above this is the cap C, carried by supports from B
The outer casing of the windchest B may be of either of the forms hereinafter
indicated viZ
(1) Part of a sphere having one fourth of the circle removed at bottom where
it is closed at the conical part B' while at the top it is formed with an opening
(2) A cylindrical box communicating at its base with the shaft A, but having
its upper end open to the air Towards their upper part the walls of this
cylindrical-box are inclined inwards towards one another, so that their respective
inclinations form on their exterior surface an angle of (or about) 30° with the
horizon
The shape of the wind chest B & the position of the cap, C, relative thereto are
such that at whatever angle the wind strikes the apparatus, a partial vacuum 18
produced in the wind chest, thus inducing an upward current in the shaft A
In some cases I produce an intensified draught by the application of inclined
tubes to the wind chest as shewn in dotted lines F, through which the wind enters,
thereby producing upwardly directed jets of air in the wind chest
On the interior of the wind chest is placed a water baffler D, which, in the event
of rain, or other water impinging on the ventilator, prevents any water that may
enter the upper opening of the wind-chest from falling down the shaft A, the
water being deflected to the circumference of the wind-chest whence it escapes,
through small apertures at E This my invention may be applied to any upcast
shaft, or tube, for the extraction of vitiated air, or foul gases from ships, railway
carriages, or other vehicles, sewers house drains, tunnels, magazines & other
structures
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 Placing a dome shaped chamber (or cylindrical box) over a tube or shaft
& surmounting the same with a cap, in such a manner as to induce a ventilating
current as before described
2 At the same time excluding, by reason of the construction of my said
invention, rain, or other water from the interior of the building to be ventilated
Dated this 30th day of December 1885