IMPROVEMENTS IN CHIMNEY Tops
Year: 1885

page_text: We, ROBERT WILSON, GEORGE STACEY WILSON, WILLIAM HENRY WILSON, and
LLOYD WILSON all of Maryport in the County of Cumberland, and all trading
under the firm or style of The Broughton Moor Fire-brick Company do hereby
declare the nature of our said invention for IMPROVEMENTS IN CHIMNEY Tops to
be as follows:-
This Invention, which relates to Improvements in Chimney tops, has for its
object the formation of down-draught-preventing Chimney tops of Fire-clay.
Under the present Improvements, the improved Chimney top is constructed
with a vertical, horizontal or inclined opening or series of openings at each of its
sides, or if round, or polygonal, at any part of the body of the Chimney top, and at
the outside of these openings, vertical, horizontal or inclined, angular, flat or half.
rounded ribs, or other equivalent protection from wind permanently secured or
removable, are arranged in such manner as to prevent currents of air passing in
through these openings and deflect such currents to the two sides thereof, thereby
creating an up-draught in the chimney. At the upper part of the improved
Chimney top, one, two or more sets of louvres or other upward inclined-openings
into the body of the chimney top are arranged so as to cause, when the top is not
closed, currents of air impinging thereupon, to take an upward course and thereby
create or augment the up-draught in the chimney. The Chimney top is closed, if
required, by means of a fixed or removable lid, slide or cover also formed of Fire-
clay, having the edge, that enters the Chimney top, deep enough to prevent the
currents of air which strike upon the louvres from entering the chimney, and so
baffling the smoke from occupying the proper exits thereof.
T 1
1007
J. H. JOHNSON, DAY & JOHNSON,
Petitioners' Agents,
115, St. Vincent Street, Glasgow,

page_text: Improvements in Chimney Tops.
We, ROBERT WILSON, GEORGE. STACEY WILSON, WILLIAM HENRY WILSON and
LLOYD WILSON all of Maryport, in the County of Cumberland, and all trading
under the firm or style of The Broughton Moor Fire-brick Company do hereby
declare the nature of our invention for IMPROVEMENTS IN CHIMNEY TOPs and. in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
Our Invention, which relates to improvements in Chimney Tops, has for its
object the formation of down-draught-preventing chimney Tops of fire-clay.
Under the present improvements, the improved chimney top is constructed with
a vertical, horizontal or inclined opening or series of openings at each of its sides,
or if round, or polygonal, at any part of the body of the chimney top, and at the
outside of these openings, vertical, horizontal or inclined, angular, flat or half
rounded ribs, or otlier equivalent protection from wind, permanently, secured "or
removable, are arranged in such manner as to prevent currents of air passing in
through these openings and deflect such currents to the two sides thereof, thereby
creating an up-draught in the chimney: At the upper part of the improved
chimney top, one, two or more sets of louvres or other upward inclined-openings
into the body of the chimney top are arranged so as to cause, when the top is not
closed, currents of air impinging thereupon, to take an upward course and thereby
create or augment the up-draught in the chimney. The chimney top is closed, if
required, by means of a fixed or removable lid; slide or cover also formed of fire-
clay, having the edge that enters the chimney top, deep enough to prevent the
currents of air which strike upon the louvres from entering the chimney, and so
baffling the smoke from occupying the proper exits thereof.
In order that our said Invention may be properly understood and readily carried
into effect, we will now proceed to describe the drawings hereunto annexed.
Figures 1 and 2 are respectively a front elevation and a side elevation of a
chimney top as constructed according to and constituting our present Invention.
Figure 3, is a horizontal section of the same taken on the line A B Figures 1
and 2.
Under our present Invention we construct the improved chimney top wholly of
fire-clay and with a horizontal, inclined or, as shewn upon the annexed Drawings,
a vertical opening a, or with a series of such openings at each of its sides; or, if
the chimney tops be round or polygonal in section these openings may be formed
at any part of the body b, of such chimney tops. The chimney top represented
upon the annexed drawings and as shewn more particularly in horizontal section
at Figure 3, is one of rectangular form and is provided with four vertical
openings a. Outside and opposite to each of these openings a, there is provided a
rib or shield c, or other equivalent protection from wind. These shields c, are so
arranged relatively to the openings a, as to prevent currents of air passing through
such openings to the interior of the chimney top, and the said shields are of such
shape that upon any currents of air striking thereon, the said currents are deflected

page_text: right and left to the two sides thereof, thereby creating an up-draught in the
chimney. Af the upper part of our improved chimney top, we provide one, two or
more sets of louvres d, or other upward inclined passages opening into the body of
the chimney top, so that when the top is, not closed by the cover hereinafter
described, currents of air, impinging thereupon, are caused to take an upward
course and thereby create or augment the up-draught in the chimney. The cover,
herein last referred to, may consist of a plug as represented at e, upon the annexed
drawings or it may be in the form of a lid or slide, in either of which forms it is so
constructed that when in position in or upon the chimney top, its lower edge
extends down sufficiently far to prevent the currents of air which strike upon the
louvres d, from entering the chimney and so baffling the smoke from occupying the
proper exits thereof.
We desire it to be understood although we have hereinbefore described and
shewn upon the annexed sheet of Drawings a particular form of chimney top that
we may vary the same without departing from the essential features of our
Invention for example we may construct the said chimney tops so that the ribs.or
shields c, are removable.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is
A chimney top constructed wholly of fire-clay and provided with horizontal,
oblique or vertical openings a, opposite to each of which is arranged a rib or
shield c, of such shape that upon currents of air striking against its outer surfaces
the smoke is drawn out through the passages formed between its inner surface and
the outer surface of the body of the chimney top, while, at the upper part of the
chimney top, by the removal of the cover or plug e, an up-draught is created, or
the existing up-draught augmented, all substantially in the manner herein before
set forth with reference to the annexed drawings.
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