IMPROVEMENTS IN CHIMNEY COWLS AND VENTILATORS
Year: 1880

page_text: LETTERS PATENT to Arthur Hancock and Hubert Samuel Heath, both of
Euston Road, in the County of Middlesex, for an Invention of "IMPROVEMENTS
IN CHIMNEY COWLS AND VENTILATORS."
PROVISIONAL SPECIFICATION left by the said Arthur Hancock and Hubert
Samuel Heath at the Office of the Commissioners of Patents on the 13th
March 1880.
ARTHUR HANCOCK and HUBERT SAMUEL HEATH, both of Euston Road, in the
County of Middlesex. "IMPROVEMENTS IN CHIMNEY COWLS AND VENTILATORS."
. Our Invention for chimney cowls and ventilators has for its object to effect the
ready exit of smoke from a chimney, or air and such like when acting as a
ventilator. By the peculiar construction of two of the sides of the cowl or
ventilator, a stack or row of chimney pots can each, if required, be fitted with our
Invention.
In carrying out our Invention we adopt mainly the following arrangements,
taking same for example as when applied to chimney pots:-
The shaft or stem of the ventilator or cowl fits onto the chimney top. The
upper part of the cowl is furnished with an expanded portion or chamber which
contracts at the top to about the same diameter as the chimney flue. Over this
chamber is a curved portion, open at the top in a similar way, which curved
portion overlapping to the required degree the outside of the lower chamber,
leaves a space between it and the inner chamber. Above the second chamber is
fixed a dome or covering, the under side thereof being preferably flat, and its
external surface preferably corrugated.
The two chambers above mentioned are curved on two sides of the cowl, the
other sides being flat surfaces.
On the outsides of these flat surfaces are fixed pieces of metal which bulge
outwards as required, leaving a space between same and the flat surfaces.

page_text: +
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Arthur Hancock and Hubert Samuel Heath in the Great Seal
Patent Office on the 13th September 1880.
ARTHUR HANCOCK and HUBERT SAMUEL HEATH, both of Euston Road, in the
County of Middlesex. "IMPROVEMENTS IN CHIMNEY COWLS AND VENTILATORS."
Our Invention for chimney cowls and ventilators has for its object to effect the
ready exit of smoke from a chimey, or of air and such like when acting as a
ventilator.
By the peculiar construction of two of the sides of the cowl or ventilator, a stack
or row of chimney pots can each, if required, be fitted with our Invention.
In carrying out our Invention we adopt substantially the following arrange-
ments, taking same for example as when applied to chimney pots:-
The shaft or stem of the ventilator or cowl fits on to the chimney top. The
upper part of the cowl is furnished with an expanded portion or chamber which
contracts at the top to about the same diameter as the chimney flue. Over this
chamber is a curved portion open at the top in a similar way, which curved portion
overlapping to the required degree the outside of the lower chamber, leaves a space
between it and the inner chamber. Above the second chamber is fixed a dome or
covering, the under side thereof being preferably flat, and its external surface
preferably corrugated.
The two chambers above mentioned are curved on two sides of the cowl, the
other sides being flat surfaces. On the outsides of these flat surfaces are fixed
pieces of metal which bulge outwards as required, leaving a space between same
and the flat surfaces.
Having thus far described the nature of the said Invention, we will now proceed
to further and particularly describe and ascertain in what manner the same is to be
performed or carried out in practice by reference to the accompanying Drawings,
that is to say,-
perspective view of our improved cowl or ventilator.
Fig. 2, vertical section.
A is the shaft or stem; B, expanded or inner chamber which contracts at C to
about the diameter of the shaft or flue; D, curved portion or chamber open at E,
fitting over the chamber B, leaving a space between said curved portion and the
chamber B at F; G, dome or cover fixed above the chamber D.
The two chambers on two sides of the cowl are curved, the other sides being flat
surfaces, as shown, and on the outside of these flat surfaces are fixed the portions H,
leaving space between the same and said flat surfaces. The arrows show the
direction of the currents.
Having now particularly described and ascertained the nature and object of the
said Invention, and in what manner the same is to be performed or carried out in
practice, we hereby declare that we claim the Invention of "Improvements in
Chimney Cowls and Ventilators," substantially as hereinbefore set forth and
described and illustrated by the accompanying Drawings, wherein an important
point or feature is the peculiar construction, substantially as hereinbefore set forth
and described, for enabling a stack or row of chimney pots to be each fitted on the

page_text: same level with the said Invention, avoiding by reason of the adoption of this
Invention any necessity for varying the heights of the chimney shafts, pots, or
cowls.
In witness whereof, we, the said Arthur Hancock and Hubert Samuel Heath,
have hereunto set our hands and seals, this Thirteenth day of September,
One thousand eight hundred and eighty.
ARTHUR HANCOCK.
(L.S.)
HUBERT SAMUEL HEATH. (L.S.)