Year: 1898

page_text: Date of Application, 9th Mar., 1898-Accepted, 16th Apr., 1898
I, JOHN MARKHAM, of 11, Abbey Walk, Grimsby, in the County of Lincoln, Builder,
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 a new or improved chimney top or cowl intended more
especially for use in situations where, on account of the close proximity of higher
buildings or from other causes, there is a tendency to down-draught, with its
unpleasant results. According to my invention I so construct my top or cowl that
from whatever direction the wind may strike the said chimney top or cowl it is
deflected and prevented from passing down the chimney or flue, or in any way inter-
fering with the upward current of the smoke from the fire, and at the same time
there is no impediment to the effectual sweeping of the chimney.
In the accompanying drawings
Figure
represents an elevation of my improved chimney top or cowl,
Figure 2 is a vertical section of same on line X-X of Figures 3 and 4, and
Figures 3 and 4 are horizontal sections respectively on lines Y-Y and Z-Z of
Figures 1 and 2.
Similar letters relate to like parts in all of the figures of the drawings.
A (Figure 1) represents that portion of the chimney or pot which is commonly
attached to the brickwork, and is adapted to receive the neck A¹ of the chimney top
or cowl, the lip or flange B resting on the top of the part A when in place. C is a
chamber of inverted truncated conical form with any convenient number of openings D
provided with hoods E projecting from the outer surface of the chamber C and open
at their lower ends as shown. The upper end of the chamber C is partially closed hy
the plate F which has a central opening G, and carries above this opening any
convenient number of vertical deflector plates H held together at their upper ends by
the metal strap I and supporting on their upper ends, by the bracket piece J, the
cover K which is preferably curved on its upper and lower sides as shown but which
may be conical or of other suitable or convenient shape. The deflector plates H are
so disposed as to leave a suitable space L between every two adjacent plates.
It will be understood that when the wind blows across or down upon the chimney
top or cowl it is to a great extent prevented from entering the chimney by the curved
deflector plates H, the curved top or cover K, and by the hoods E over the openings D
in the chamber C, the said openings D and the spaces I. between the deflector
plates H affording ample means of egress for the smoke under all conditions. Should
any wind however find its way between the deflector plates H and into the chamber C
it will be expelled with the rising smoke through the hooded openings D.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
First. The new or improved chimney top or cowl which consists of a chamber C
having openings D provided with hoods E, deflector plates H with spaces L

page_text: between them, and cover K, substantially as described with reference to the
drawings.
Second. In a chinney top or cowl the combination of the chamber C having hooded
openings D, with the deflector plates H having open spaces L between them, and the
cover K, substantially as described.
Third. The chimney top or cowl constructed and arranged substantially as des-
cribed.