IMPROVE- MENTS IN CHIMNEY POTS OR TERMINALS
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by James Proctor at the Office of
the Commissioners of Patents, with his Petition, on the 28th August
1866.
I, JAMES PROCTOR, of Kennington Grove, Upper Kennington, in the County
of Surrey, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN CHIMNEY POTS OR TERMINALS," to be as follows:-
My Invention has for its object the construction of a chimney pot or terminal
that shall effectually prevent a downdraught. For this purpose I form or
fix inside such pot or terminal two or more sloping plates or projections, situated
at any convenient distance one above the other; these plates or projections
spring alternately from opposite sides of the pot, and project upwards at any
suitable angle, each one passing somewhat beyond the centre line of the pot,
so that the edge of the one above overhangs the one below. At the part of
the pot from which these plates or projections spring apertures are formed
in the sides of the chimney pot, so that any wind entering the top of the
chimney will be caught by and made to pass down the upper surfaces of the
projections or plates, and will thus be conducted out through the before-
mentioned apertures, and in the same way air entering through the side
apertures will pass along the sloping surfaces and be conducted up through
the top of the pot into the open air again. By making the edge of the upper
plate overhang the one below it will be evident that all or nearly all the wind
will be caught and guided out as described. In some cases I form an aperture
in the side of the pot below as well as above the sloping plates, and I protect

page_text: the aperture below by means of a hood, so that any wind passing in through
the side aperture to the lower sloping plate that in striking against the under
side of the sloping plate above passes down instead of up the same, can
escape through such additional aperture; the aperture at the top of the pot
may or may not be covered with a hood, cap, or elbow piece. The sloping
plates or projections may either be fixed in their position, or they may be
hinged to the pot at the point in the side of the latter, from which they
spring, and be held in their sloping position by resting against projections ou
the sides of the pot, by which arrangement they will allow of the passage of
the sweeps' broom up the pot, and they may be provided with a balance weight
or spring so as to cause them to assume their sloping position again when the
broom has been withdrawn. If the plates are fixed I prefer to prevent the
deposit of soot thereon by fixing a revolving cowl of any known construction
over the open top or at the side thereof, which imparts rotary motion to one
or more revolving fans inside the pot near the surface of the plates, which
will serve to blow away the soot therefrom, or such revolving fans may be
fixed upon the surface of the plates, and made to revolve by the wind passing
through the side apertures.
Chimney pots or terminals constructed according to my Invention may be.
made of any suitable known shape or form, and of any suitable material, such
as zinc, iron, either tinned or galvanized, or not, terra cotta, or earthenware.