IMPROVEMENTS IN CHIMNEY TOPS AND VENTILATORS
Year: 1880

page_text: LETTERS PATENT to William Hickey and Stephen Barnett, both of Tonbridge
Street, in the County of Middlesex, for an Invention of "IMPROVEMENTS IN
CHIMNEY TOPS AND VENTILATORS."
PROVISIONAL SPECIFICATION left by the said William Hickey and
Stephen Barnett at the Office of the Commissioners of Patents on the 12th
May 1880.
WILLIAM HICKEY and STEPHEN BARNETT, both of Tonbridge Street, in the
County of Middlesex. "IMPROVEMENTS IN CHIMNEY TOPS AND VENTILATORS."
This Invention relates to the construction of an improved chimney top and
ventilator, whereby down draught is prevented and an upward current ensured,
the improved top being thus suitable either as a top for chimneys and flues for
preventing smoke or as a ventilator.
In carrying out our Invention we employ a vertical tube or cylinder of suitable
length, on which we place an inverted truncated conc. Above this cone we place
a hemispherical cap, the diameter of which is larger than the base of the cone, a
horizontal flange connecting the two parts together. The upper central part of
the hemispherical cap is open, the opening corresponding in size with the opening
of the vertical tube or cylinder, and provided with a flanged neck.
At a
suitable distance above the flanged neck we fix a louvre, over which is fixed a
curvilinear top or cap, the central portion of the underside of the cap being
preferably flat, or nearly so.
The apparatus may be made of any suitable material.
"
"

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Hickey and Stephen Barnett in the Great Seal Patent
Office on the 12th November 1880.
WILLIAM HICKEY and STEPHEN BARNETT, both of Tonbridge Street, in the
County of Middlesex. "IMPROVEMENTS IN CHIMNEY TOPS AND VENTILATORS."
This Invention relates to the construction of an improved chimney top and
ventilator, whereby down draught is prevented and an upward current ensured,
the improved top being thus suitable either as a top for chimneys and flues for
preventing smoke or as a ventilator.
In carrying out our Invention we employ a vertical tube or cylinder of suitable
length, on which we place an inverted truncated cone. Above this cone, we place
a hemispherical cap, the diameter of which is larger than the base of the cone, a
horizontal flange connecting the two parts together. The upper central part of
the hemispherical cap is open, the opening corresponding in size with the opening
of the vertical tube or cylinder, and is provided with a flanged neck. At a suitable
distance above the flanged neck we fix a louvre, over which is fixed a curvilinear
top or cap, the central portion of the underside of the cap being preferably flat or
nearly so.
But to make our Invention better understood we will proceed to describe the
same by reference to the accompanying Drawing, in which Figure 1 is an elevation,
and Figure 2 is a vertical section of a chimney top or ventilator constructed
according to our Invention. Figure 3 is a view similar to Figure 2 but with a
slightly modified construction of the upper part of the cap. Similar letters in all
the Figures represent similar parts.
Over the
In the chimney top or ventilator shewn in Figures 1 and 2, a, a, is the ordinary
vertical tube or cylinder, which is made of any suitable length and diameter; b is
the inverted truncated hollow cone fixed on the top of the cylinder a.
cone we place the hemispherical cap c having a larger diameter than the base of
the conical part b, as shewn. d is the horizontal flange connecting the parts b and
c together; e is the open part at the centre of the top of the hemispherical part c,
such opening e corresponding in size with the opening of the vertical tube or
cylinder a fis the flanged neck of the hemispherical part c; g is the louvre above
the flanged neck f and between it and the top or cap h; i, i, stays or supports
connecting the louvre g and cap h to the hemispherical part c; j, j, stays or
supports connecting the cap h to the louvre g; k, the flat underside part of the
cap h.
The action of this improved construction of chimney top or ventilator will be
understood by reference to the arrows, and needs no further description.
The chimney top or ventilator shewn in Figure 3 is similar in construction to
that herein before described, except that the centre part of the cap h is left open at
m, a flat plate of larger diameter than the opening m being suspended by means
of chains n or otherwise a short distance below the opening m, so as to allow of
the plate being, easily removed for cleansing. The action is substantially the
same as that herein before described.
.
In some cases instead of employing the plate 7 we apply a spring cover to the
opening m, such cover opening both outwards and inwards, so to allow of the
chimney top or ventilator being swept in the ordinary manner, the spring cover
allowing of the passage of the broom, and automatically closing when the broom is
withdrawn.
Having now described our said Invention, and the best means with which we
are acquainted for carrying the same into effect, we would have it understood
that we do not confine ourselves to the precise details herein laid down and shewn

page_text: in the Drawing, as the same may be varied without departing from the peculiar
character of our Invention, but what we claim is,―
The improvements in chimney tops or ventilators, substantially as hereinbefore
described and represented in the accompanying Drawing, or any more modification
thereof.
In witness whereof, I, the said Stephen Barnett, for and on behalf of myself
and the said William Hickey, have hereto set my hand and seal, this
Twelfth day of November, in the year of our Lord One thousand eight
hundred and eighty.
STEPHEN BARNETT. (L.S.)