An Improved Chimney Cowl and Ventilator.
Year: 1889

page_text: Date of Application, 27th July, 1889
Complete Specification Left, 22nd Apr., 1890-Accepted, 24th May, 1890
PROVISIONAL SPECIFICATION.
An Improved Chimney Cowl and Ventilator.
We, JOSEPH STENNER of Fore Street Engineer & Ironmonger, SIDNEY HAMLIN, of
Leat Street Mechanical Engineer and ROBERT STENNER of Fore Street Engineer
all of Tiverton in the County of Devon, do hereby declare the nature of this invention
to be as follows :—
This invention consists of a Ventilator, or Chimney Top, with a revolving body,
which contains curved vertical vanes, or louvres, forming an exhaust fan over the
flue pipe. Above these is a conical cap, on which is a series of carved hollowed
vanes, so shaped as to catch the wind from any quarter, and act as the propeller
of the exhaust fan below.
We are aware that the foregoing parts are not entirely new, and we do not
claim them as our invention except as regards their combination with what follows.
The chief distinction between our Ventilator and others lies in the addition of a
revolving curtain actuated by a single large vane above the revolving body, to which'
vane the curtain is connected by metal straps.
This curtain encloses the vertical louvres of the exhaust fan, for some two-thirds
of their circumference, and is guided by the large vane on top, so that its opening is
always turned away from the wind.
In the centre of the cowl is a tubular double action oil box in which the solid spindle
of the revolving body and the tubular spindle of the curtain work. This oil box is
supported by metal straps from the flue pipe in the usual way.
The curtain is attached to a brass tubular spindle which has an annular seat on a
steel bearing at it its lower end, and which surrounds the solid spindle so as to
allow the curtain to work freely in either direction quite indipendently of the
revolving body inside it. This brass tube is supported in a vertical position by
annular bearings fixed in the oil box for this purpose.
A very slight wind or ascensional current is sufficient to set the apparatus in
action.
COMPLETE SPECIFICATION.
An Improved Chimney Cowl and Ventilator.
We, JOSEPH STENNER of Fore Street, Engineer and Ironmonger, SIDNEY_HAMLIN
of Leat Street, Mechanical Engineer, and ROBERT STENNER of Fore Street, Engineer,
all of Tiverton in the County of Devon, 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:-
This invention is designed to render revolving Cowls or Ventilators more efficient
by partially protecting the exhaust vanes and exits, from violent winds, which often
check the ascending current.
The invention consists of a Ventilator or chimney top with a revolving body which
contains curved vertical vanes or louvres, forming an exhaust fan over the flue pipe.
Above these is a conical cap on which is a series of curved hollow vanes, so shaped
as to catch the wind from any quarter and act as the propeller of the exhaust fan
below.
We are aware that the foregoing parts are not entirely new, and we do not claim
them as our invention, except as regards their combination with what follows.

page_text: The chief distinction between our ventilator and others lies in the addition of a
curtain or windguard revolving independently of the exhaust vanes and actuated by
a single large vane above the revolving body, to which vane the curtain is connected
by metal straps.
This curtain encloses the vertical louvres of the exhaust fan for some two-thirds of
their circumference, and is guided by the large vane on top, so that its opening or
openings are always turned away from the wind current.
We will now refer to the accompanying drawings in which Fig. 1 shews a general
view of my improved Chimney Cowl and ventilator in perspective. Fig. 2 shews a
vertical section through the oil box, drawn to a larger scale. Fig. 3 shews the
sectional plan of the same.
a, is the flue pipe. b, shews the metal supporting straps or stays for oil box.
c, is the curtain or windguard. d, shows the exhaust vanes. e, shows the curved
hollow vanes on cap. f, is the conical cap. 9, is the large vane connected to
curtain c. h, shows the vertical strap sustaining g. i, is the oil-box. j, j, are
the annular bushes for the hollow spindle. 7, is the support for the lower annular
bush. k, k, are spaces formed in the bushes j, 1, for fubricating purposes. 1, is
the tubular spindle. m, is the steel bearing for the spindles.
n, is the solid
spindle. o, o, are the bushes of the solid spindle. p, is an oil hole for the solid
spindle.
It will be seen that in the centre of the cowl is a tubular double action oil-
box i, in which the solid spindle n, of the revolving vanes d, and e, works. This
oil box is supported by metal straps 6, from the flue pipe in the usual way.
The curtain c, is attached to a brass tubular spindle 2, which has an annular seat on
a steel bearing m, at its lower end, and which surrounds the solid spindle so as to
allow the curtain to work freely in either direction, quite independently of the
revolving body inside it. This brass tube is supported in a vertical position by
annular bushes, 1, fixed in the oil box for the purpose.
A very slight wind or ascensional current is sufficient to set the apparatus in action,
and a strong ascensional current is thereby set up, which being protected by the
ourtain is able to find a steady and unimpeded exit.
One or more openings or mouths are provided in the curtain, for the escape of the
smoke or foul air.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be. performed, we declare that what we
claim is :-
1. In a revolving exhaust Cowl or Ventilator, the curtain or windguard c, with
guiding vane g, furnished with one or more apertures or exits, the said curtain
revolving freely on the independent spindle Z, as heroin explained and set forth.
2. In a Ventilator or Cowl the combination of revolving 'vanes or louvres, with a
rotating curtain or windguard as herein explained and set forth.
Dated tid day of Apill 1000.
Wo
VI
S. S. BROMHEAD,
97, Newgate Street, London, E.C, Patent Agent.