IMPROVEMENTS IN CHIMNEY COWLS OR CANS
Year: 1884

page_text: We, ALEXANDER THOMSON, of 48 Queen Square, Strathbungo, in the County
of Renfrew, Builder, and ROBERT ANDERSON of 116 Dumbarton Road, Glasgow,
in the County of Lanark, Joiner, do hereby declare the nature of our said
Invention for "IMPROVEMENTS IN CHIMNEY COWLS OR CANS"; to be as follows
This Invention relates to improvements in chimney cowls or cans.
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The improved cowl or can consists of a conical or conoidal hood of earthenware
or galvanised iron, which is of larger diameter at its lower end than at the top, and
is fitted and carried over the upper end of the usual chimney can, or. of the
improved can piece hereinafter described, by radial arms or webs or similar devices,
so as to leave an annular space between the can and hood.
Within the hood is fitted a conical deflector which is made flat on its lower side,
and is hung over the top of the can at a sufficient distance from it, to leave space
for the outlet of the smoke. The deflector is made of larger diameter than the top
of the can, so that rain falling down its sides may drop outside the can, and that
any blow-down of wind through the hood may also be directed outwards through
the annular space between the hood and can; while in ordinary circumstances the
smoke coming out of the can will pass round the lower side of the deflector, and up
the annular space between it and the hood. The deflector may be hung so that its
position in the hood can be adjusted vertically.
The can piece which is by preference used, and which may, be combined with the
hood, is of the usual shape, but formed with a number of nozzles or air ducts
entering into it at different points round the can. These nozzles are inclined
upwards and inwards, so that the wind blowing into them will be deflected
upwards through the can and will materially assist the draught.
L
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page_text: We ALEXANDER THOMSON. of 48 Queen Square, Strathbungo, in the county of
Renfrew, Builder, and ROBERT ANDERSON, of 116 Dumbarton Road, Glasgow, in
the county of Lanark, Joiner, do hereby declare the nature of our said Invention
for "IMPROVEMENTS IN CHIMNEY COWLS OR CANS," and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :—
The improved cowl or can; which is illustrated in elevation and in section in
figures 1 and 2 of the accompanying drawings, consists of a conical or conoidal
hood A of earthenware or galvanised iron, which is of larger diameter at its lower
end than at the top, and is fitted and carried over the upper end of the usual
chimney can or of the improved can piece B, by radial arms or webs a or similar
devices, so as to leave an annular space between the can B and bood A.
Within the hood A is fitted a conical deflector C which is hung over the top of
the can at a sufficient distance from it, to leave space for the outlet of the smoke.
The deflector C is by preference made of larger diameter than the top of the can B,
so that rain falling down its sides may drop outside the can, and that any
blow-down of wind through the hood A may also be directed outwards through
the annular space D between the hood and can; while in ordinary circumstances
the smoke coming out of the can will pass round the lower side of the deflector C,
and up the annular space E between it and the hood A. The deflector C may be
hung on screws or similar fastenings so that its position in the hood A can be
adjusted vertically.
The can piece B which is by preference used, and which may be combined with
the hood, is of the usual shape, but formed with a number of nozzles or air ducts b
These nozzles are inclined
entering into it at different points round the can.
upwards and inwards, so that the wind blowing into them will be deflected
upwards through the can and will materially assist the draught.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is,
The improved chimney cowl herein described and illustrated.