IMPROVE- MENTS IN THE MEANS OF AND APPARATUS POR PREVENTING OR CURING SMOKY CHIMNIES
Year: 1866

page_text: LETTERS PATENT to William Cooke, of Grosvenor Road, Stockwell, in
the County of Surrey, Civil Engineer, for the Invention of "IMPROVE-
MENTS IN THE MEANS OF AND APPARATUS POR PREVENTING OR CURING SMOKY
CHIMNIES."
Sealed the 22nd June 1866, and dated the 6th April 1866.
PROVISIONAL SPECIFICATION left by. the said William Cooke at the
Office of the Commissioners of Patents, with his Petition, on the 6th
April 1866.
I, WILLIAM COOKE, of Grosvenor Road, Stockwell, in the County of
Surrey, Civil Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE MEANS OF AND APPARATUS FOR PREVENTING OR CURING
SMOKY CHIMNIES," to be as follows:-
This Invention relates to certain improvements in the means of and
apparatus for preventing or curing smoky chimnies of every construction.
The apparatus consists of an outer cylinder or tube formed in three parts
or sections; but united and held in position by interior vertical rods or plates
fixed to the inner periphery of the tube.
The cylinder is not formed with divisional spaces horizontal to the central
or vertical line of the cylinder, but the three sections when fastened by the

page_text: internal rods present two diagonal or oblique spaces reverse to each other,
that is to say, if the upper space inolines downwards from right to left the
lower space inclines from left to right.
The uppermost division of the cylinder is open at top and bottom, and has
a month-piece of an enlarged diameter.
The second or central division is open at the lower end, but is closed at
the top by an oval or elliptical perforated disc having a short length of
chimney pipe fixed therein, such pipe extending partly only towards the level
of the mouth.
The lowermost division is similarly formed, but, as before stated, the
obliquity of the closed surface becomes reversed, and therefore the lower
chimney tube set therein comes under but not touching the sloping surface of
the central division, and on the opposite internal side of the outer tube to that
of the upper chimney pipe.
The lowermost part of the outer tube is provided with an internal ring of
inetal or other material held by stay pieces in order to fasten the apparatus to
the top of the shaft or brickwork of the chimney.
1
Now the operation and effect of this apparatus is as follows:-When the
wind blows down the mouth of the chimney top, or tends in any way to retard
the exit of the smoke, the greater quantity of the current is caused to escape
down the top plate of the central division and outwards beyond the outer
tube; then, again, whatever smoke may be driven down, the upper chimney
tube is forced outwards likewise through the lower oblique opening and over
the top plate of the lowest division; so also the smoke ascending in the
lower chimney tube has a tendency to pass and must escape if the wind be
very strong through the said space.
.
It is obvious that rain could never fall down the chimney beyond the first
chimney tube, since it would be carried off by the oblique upper plate or
covering.
t
The apparatus may be made of metal, pottery, or other materials or com-
bination of materials, and the number of divisions may be increased if desired,
the principle before described being maintained. i