Improvements in Chimney and Ventilator Tops.
Year: 1896

page_text: Date of Application, 10th Feb., 1896-Accepted, 28th Mar., 1896
COMPLETE SPECIFICATION.
Improvements in Chimney and Ventilator Tops.
I MONTAGUE HENRY FOSTER, of Stubbington House, Fareham, in the County
of Hants, Gentleman, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This invention relates to improvements in chimney and ventilating tops and has
for object to prevent gusts of wind blowing down the shaft, thereby in the case
of chimneys causing them to smoke. The invention is particularly applicable for use
upon chimueys or ventilators surrounded by higher buildings or in other positions
where cross currents are met with, so frequently a cause of down draught and
consequent puffing out of smoke at the fire place. These inconveniences in
accordance with this invention are entirely overcome.
And in order that this invention may be fully understood I will describe same
with reference to the accompanying drawings which represent in Fig. 1 a side
elevational view of the upper portion of a chimney top fitted with my improvements;
in Fig. 2 a plan view with cover removed, and in Fig. 3 a perspective view of the
chimney top also with cover removed.
Similar letters of reference indicate like parts in each of the figures.
A is the chimney top made of galvanized iron, zinc, copper, sheet metal, or
other suitable material which is fixed upon the top of the chimney stack. This
chimney top A is provided with a cover B and has openings or apertures C formed
in the side thereof.
These openings C are covered by flaps D hinged at their upper edges E to the
sides of the chimney top A. The opposite flaps D are connected together by
connecting rods or bars F which may be in one piece or jointed as found most
convenient. Each of these bars F are slightly longer than the diameter of the
chimney top thus ensuring that when one flap D is closed the opposite one is open
sufficiently to permit of the passage of the smoke. G G are cross bars placed
within the chimney top below the level of the openings to prevent the sweep's
broom when the chimney is swept fouling the flap connections.
It will be readily observed that any sudden changes or veering of the wind will
automatically close the flaps against which the air currents strike and open for
the passage of the smoke the opposite flaps, and further that no down draught
through the chimney is at all possible whatever may be the nature of currents
of air playing around or upon the chimney top constructed as above described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvements in chimney and ventilator tops substantially as and for the
purposes herein before described.
2. The chimney or ventilator top A formed with cover B and apertures C in its
sides; in combination with the flaps D hinged at E and connected in pairs by rods
or bars F; all constructed arranged and operating substantially as and for the
purposes set forth.
Dated this 10th day of February 1896.
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents for the Applicant.