New or Improved Top for Chimneys, Ventilators, and the like.
Year: 1899

page_text: Date of Application, 28th Dec., 1899-Accepted, 27th Jan., 1900
COMPLETE SPECIFICATION.
New or Improved Top for Chimneys, Ventilators, and the like.
We, WALTER BILTON RAMSEY, Commission Agent, of 77, Tiverton Street,
CHARLES DAVIES, Auctioneer, of 117, Thorold Street, and ARTHUR LEE, Draper
and House Furnisher, of The Firs, Abbey Park Road, all of Grimsby, in the
County of Lincoln, 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:―
The object of this invention is to provide means by which down-draughts are
prevented in chimneys, ventilating-pipes, and the like, while allowing at the
same time free outlet for the escape of smoke or other products of combustion,
vitiated air, or the like, through openings in the top.
In applying this invention to a chimney top, for example, we provide any
convenient number of smoke-openings in the sides of the chimney top, such
smoke-openings being so disposed that each has its counter-part on the opposite
side of the chimney top. Each opposite pair of these smoke-openings is provided
with a pair of shutters or cover-plates, connected together at their upper ends
by a bar, rod, or frame, pivotally mounted in or on the upper part of the chimney-
top in such a manner that when in the normal position the shutters or cover plates
depend over but a short distance from the smoke openings in the sides of the
chimney-top, and when one of such shutters or cover plates is acted upon by the
wind it immediately approaches the side of the chimney-top, closing the smoke-
opening, excluding the wind therefrom, and preventing down-draught; while the
shutter or cover plate diametrically opposite is moved further away from its
corresponding smoke-opening in the side of the chimney-top, allowing freer
egress for the smoke through the smoke-opening on that side of the chimney-top
which does not face the direction from which the wind is blowing, and through
which there is consequently no risk of down-draught.
The accompanying drawings illustrate chimney-tops constructed in accordance
with our invention. Figure 1 is a plan, and Figures 2 and 3 sectional elevations.
Figure 4 is a plan and Figure 5 a sectional elevation illustrating a modification
of our invention.
Similar letters relate to like parts in all the figures of the drawings.
In Figures 1, 2 and 3, a is the chimney-top, which is shewn square, but it is
obvious that it may be hexagonal, octagonal, or of any other suitable shape. It
is shewn as being constructed of metal but it is also obvious that it may be made
of pot-ware or partly of pot-ware and partly of metal.
C
6 are the smoke openings, e are one pair of shutters or cover-plates the upper
parts of which are attached to an oscillating bar or rod d which is pivotted at f
to a casting which forms the upper part of the chimney-top as shewn. h are
shutters or cover-plates similar to those lettered e but mounted on the other two
sides of the chimney-top on the oscillating rod or bar i which is pivotted at k
to the casting n. The shutters or cover plates c and h are mounted on the
oscillating bars or rods d and i, preferably at such an angle that they shall
be parallel to the sides of the chimney top when in the closed position.

page_text: In the modification illustrated in Figures 4 and 5 the oscillating frames d
and a are substituted for the bars or rods shewn in Figures 1, 2 and 3. They
are provided with ears e and j from which they are suspended freely from the
fixed pins f and k attached to the band g. Or one of the frames may be suspended
from the other after the manner of the gimbal arrangement of a mariner's com-
pass for example..
Fixed wings or projections of suitable shape may be provided at the sides of
the smoke openings 6 in order to prevent the wind entering the chimney top
through the angular space between the shutters or cover plates c, h, and the sides
of the chimney-top. And in some cases the shutters or cover plates c, h, may be
suitably balanced by springs, or the like, in order to keep them in their normal
position until acted upon by the wind. We sometimes provide air inlet tubes,
of conical shape with flared or trumpet-shaped mouths, in order to secure an
upwardly directed inrush of air to facilitate the egress of the smoke through the
smoke-openings b.
In order to minimise the noise caused by the shutters or cover plates eh coming
into contact with the sides of the chimney-top, pads or buffers of indiarubber or
other suitable material may be employed.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
In a chimney or ventilator top having lateral outlet openings, the combination
with such openings of shutters or cover plates rigidly connected together by an
oscillating bar, rod, or frame, substantially as and for the purpose described.
Dated this 13th day of December 1899