MENTS IN VENTILATING APPARATUS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by William Scott at the Office of the
Commissioners of Patents on the 3rd October 1878.
WILLIAM SCOTT, Engineer, of Angel Court, in the City of London. " IMPROVE-
MENTS IN VENTILATING APPARATUS."
My Invention has for its object the through and automatic ventilation of any
building, carriage, or drain by the action of the wind in the simplest and most
effective manner.
I construct my apparatus for the ventilation of large public buildings in the
shape of a square ornamental louvre case which I place on the roof or top of such
building, and which is open at the sides and provided with a suitable cover.
This case contains four up-cast or ventilation shafts, one in each corner and
communicating with the interior of the building which it is required to ventilate.
These ventilation pipes are enclosed with vertical curved vanes in which two
lateral openings only are left communicating with the interior of the case.
In front of each of these lateral openings is arranged another vertical curved
baffle plate which guides the passage of the wind in certain fixed directions
through the case entering from either of the four sides and issuing at the opposite
side.
The side protecting vanes surrounding the ventilation pipes are curved so that
the entering wind is obliged to pass accross the lateral opening to the said pipes and
is thus deflected on to the side curved baffle plates.
When issuing from the opposite side the wind again meets curved V plates
protecting the ventilation pipes, and is thus forced in issuing to pass accross the
lateral openings to the ventilation pipes, and to strike again the curved side baffle
plates.
The passing of the wind by means of curved surfaces accross the opening to the
ventilation pipes causes a suction draught and through ventilation.
My next modification is for the purpose of ventilating a soil pipe or drain.
In this case I construct my apparatus in the form of an ornamental finial which
I fix upon the ridge of any suitable or adjoining roof.
This finial is formed by an ornamental base through which the vertical ventila-
tion pipe ascends.

page_text: The mouth of the ventilation pipe is protected with a bell-mouth tube which
extends downwards below the mouth of the ventilaton tube over a similarly curved
and spreading plate attached to the mouth of the ventilating tube.
This forms an outward and easy curved ingress to the atmosphere or wind which
may thus enter from any side and is thus obliged to blow upwards around the
mouth of the ventilation pipe which will accordingly be exhausted and ensure a
through current upwards from the soil pipe or drain.
The upper exit of this top covering is bell-mouthed slightly outward with a
double-pointed curved cylindrical baffle placed in its orifice, and this side exit is
again protected by an outside V baffle plate to prevent down draught.
The wind when striking this protected exit is diverted upwards and downwards,
thus aiding and not opposing the escape of the noxious air from the interior.
I further modify my Invention to adapt the same to the ventilation of carriages.
For this purpose I place on the top or roof of the carriage a case provided with a
suitable cover but open at the front and rear sides.
These sides are provided with curved partitions so arranged as to present au
opening for the wind and divert and conduct the same upwards so as to pass over
the orifice of a vertical central pipe which passes through the carriage roof to
ventilate the same.
..
The entering blast is deflected upwards against the top curved baffle plate from
whence it finds an easy exit through the opposite openings, carrying with it by
exhaustion the vitiated air from the interior of the carriage.
The apertures in the front and rear of the case may be divided by a vertical
partition which aids the sides of the case in properly directing the currents. The
vertical ventilation pipe may be also divided by a central vertical partition.