A DOWNCAST VENTILATOR
Year: 1884

page_text: WO THOMAS HOPKIRK HERBERTSON and ROBERT POLLOCK of 10 Holborn,
London in the County of Middlesex, Engineers do heroby declare the nature of
our invention for A DOWNCAST VENTILATOR to be as follows:-
The object of this invention is the better to ventilate ships and buildings by the
admission of fresh air, which shall be taken from the decks or roofs to any desired
portion or room by means of pipes, without either sea or rainwater being allowed to
enter the pipes This is accomplished by means of a head made of galvanised
sheet iron or other metal, having a double row of six mouths so arranged as to
throw the air impinging upon them downwards into the pipe. This pipe is
protected by a cone so that although the air passes into the pipe, water cannot, but
is thrown off into an outer pipe or casing, in the bottom of which is a series of
holes for the escape of water, so protected that the air shall not escape by this
means.
THOS H. HERBERTSON,
ROBERT POLLOCK,
COMPLETE SPECIFICATION.
We TпOMAS HOPKIRK HERBERTSON, and ROBERT POLLOCK, of 16 Holborn,
London, in the County of Middlesex, Engineers, do hereby declare the nature
of our invention for A" DOWNCAST VENTILATOR" and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
The object of this invention is the better to ventilate ships and buildings by the
admission of fresh air, which shall be taken from the decks or roofs to any desired
portion or room by means of pipes without either sea or rainwater being allowed
to enter the pipe. This is accomplished by means of a head made of galvanised
sheet iron, copper, or other convenient metal, having a double row of six mouths so
arranged as to throw the air impinging upon them downwards into the pipe. This
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pipe is protected by a cone, so that although the air passes into the pipe, water
cannot, but is thrown off into an outer pipe or casing in the bottom of which is a
Beries of holes for the escape of the water, so protected that the air shall not escape
by this means.
Figure 1, in accompanying drawings is an elevation of the ventilator.
Figure 2, on the accompanying drawings gives a section of the ventilator. A. A.
A. A show the mouths formed of a hexagonal inverted cono 1, and curved plates 2.
C. C. C. denote the pipe by which the air is carried to the various apartments. Dis
the cone covering same to prevent water entering the pipe. E cross pieces of metal
to keep the cone D in position, as also to prevent the air from merely passing over
the pipe C. B. B. B. B shews the outside casing forming with F. F. a chamber into
which water entering the head is discharged; G. G. shewing the holes in same for
the egress of the water protected as follows:-G' is a plate perforated with holes,
these holes being protected above by small plates or bridges G and beneath by
small plates G³, thus the chamber F. F. is cut off from direct communication with
the outer holes G. G. This can also be accomplished by placing a number of small
valves as per Figure 3. so as to cover the openings in plate G¹ and above the
holes G. G. These valves are set on a pivot with balanced lever so adjusted as to
resist any pressure of wind that may come upon them, but to be overbalanced by a
given weight of water, leaving the holes in the plate G¹ unprotected, and by this
means allowing the water to escape through the openings G. G.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed wo declare that what
we claim is
1. Downcast Ventilators with head consisting of double row of six mouths, so
arranged that any wind impinging upon them is thrown into both sides of the
chamber or pipe at the same time, and arrangement for egress of water by defending
outlet with plates of metal as above described and illustrated in Figure 2. on
accompanying drawings.
2. Downcast Ventilators with head consisting of double row of six mouths, so
arranged that any wind impinging upon them is thrown into both sides of the
chamber or pipe at the same time, and arrangement for egress of water, by
defending outlet with valves as above described, and illustrated in Figure 3, on
accompanying drawings.