Year: 1887

page_text: Date of Application, 10th Nov., 1887
Complete Specification Left, 10th Aug:, 1888
Complete Specification Accepted, 14th Sept., 1888
I, JOSEPH MORRIS, of 174 Commercial Road, East, in the County of Middlesex,
Commercial Traveller, do hereby declare the nature of my said invention to be as
follows:-
The object of my invention is to manufacture an improved ventilator or cowl for the
tops of ventilating shafts and Chimneys.
I form my improved ventilator of metal, the lower part being usually square,
tapering upwards into a circular form. Four or more openings are made, a short
distance from the lower end, and one or more rings, (each ring being in the form
are fitted round the
of a truncated cone, with the base downwards) is or
openings.
Upon this formation, as a base, I fix four vertical radial plates, at right angles to
each other, and united in the centre, leaving four quadrantal openings from the flue.
These openings are fitted with hinged flaps, each flap being fitted with a short
weighted lever, so that the flap has a tendency to rise in a vertical direction, except
when acted upon by the wind, the pressure of which more or less closes the same, and,
consequently, the opening to which it is fitted.
At some distance above these flaps or valves + pivotted plates are mounted, which
are also acted upon by the wind, and which are connected, by means of chains or rods,
with the valves below them, the chains being so placed as to assist in closing the valves,
when the plates are inclined by the wind.
Above, the ventilator is fitted with a cover plate, so formed as to deflect the wind in
a downward direction, on the windward side.
The apparatus is fixed to the top of the flue in the usual manner, the whole of the
openings remaining uncovered in calm weather; but, in a current of wind, the valve
or valves on the weather side of the ventilator, is or are closed by its pressure, and
downdraught is entirely prevented.

page_text: The considal rings impart an upward tendency to the wind, inducing an upward
draught while the partial vacuum, or reduced pressure, on the lee side of the
ventilator, being communicated to the column of air in the flue, facilitates the upward
and outward flow of air or smoke.
1, JOSEPH MORRIS, of 174 Commercial Road East, in the county of Middlesex,
Commercial Traveller, do hereby declare the nature of my said invention 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 my invention is to manufacture an improved ventilator or cowl for
the tops of ventilating shafts and chimnies.
I form my improved ventilator of metal, the lower part being usually square, tapering
upwards into a circular form.
Four or more openings are made, a short distance from the lower end, and one or
more rings, (each ring being in the form of a truncated cone, with the base down-
wards,) is or are fitted round the openings.
Upon this formation, as a base, I fix four vertical radial plates, at right angles to
each other, and united in the centre, leaving four quadrantal openings from the
flue.
These openings are fitted with hinged flaps, each flap being fitted with a short
weighted lever, so that the flap has a tendency to rise in a vertical direction,
except when acted upon by the wind, the pressure of which more or less closes the
same, and, consequently, the opening to which it is fitted.
At some distance above these flaps or valves 4 pivotted plates are mounted, which
are also acted upon by the wind, and which are connected, by means of chains or
rods, with the valves below them, the chains being so placed as to assist in closing
the valves, when the plates are inclined by the wind.
Above, the ventilator is fitted with a cover plate, so formed as to deflect the wind
in a downward direction, on the windward side.
The apparatus is fixed to the top of the flue in the usual manner, the whole of the
openings remaining uncovered in calm weather; but, in a current of wind, the valve
or valves on the weather side of the ventilator is or are closed by its pressure, and
downdraught is entirely prevented.

page_text: And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is an elevation of my invention as usually made, and Fig. 2 is a sectional
elevation of the same.
Fig. 3 is a section on the line a b.
Fig. 4 is a section on the line c d.
Fig. 5 is a section on the line ef, and
Fig. 6 is a section on the line gh.
k is the lower part of the ventilator which in this instance is shown square below
and tapering to a circular form above. 11 are openings, which are covered by the
considal ring m.
nnare narrow openings left between the considal ring m and the
wall of the ventilator. The cylindrical portion of the ventilator terminates at a.
The upper part of the ventilator, from a to the cap consists of four vertical radial
plates oooo, at right angles to each other, united together in the centre, and firmly
fixed to the upper end of . These plates divide the current, flowing from the
ventilator, into four quadrantal portions, reach of which is fitted with a hinged
flap p, which is capable of more or less closing the openings r. The flaps p are fitted
with weights ss at the ends of short levers, to cause the flaps p to open, when not
pressed by the wind.
A small opening is made at t, at the junction of the plates o. ነ ጋ ገ ዢ are four
pivotted plates, swung upon cross bars u, as shown. The plates u may be pivotted
to the top of the ventilator in a similar manner. The plates and pare connected
together by chains in such a manner that, when the plates are acted upon by the
wind, as shown by the arrows in Fig. 2, the plates a assist the plates in closing
the opening above which it is pivotted. w is a cover plate, so formed as to deflect the
wind in a downward direction.
yy are rods fitted to prevent the plates p passing beyond a horizontal position. One
portion of the flue is shown closed by the plate p in Fig. 4, the other plates being
vertical.
The considal ring m imparts an upward tendency to the wind, and covers the
openings 1, while the partial vacuum, or reduced pressure on the lee side of the
ventilator being communicated to the column of air in the flue, the upward and outward
flow of air or smoke is powerfully accelerated.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The manufacture and use of the improved ventilator and chimney cowl, constructed,
arranged, and operating substantially as herein before described and illustrated by the
drawings.
GEO. DOWNING,
8, Quality Court, London, W.C.,
Agent for Applicant.