Improvements in or applicable to Chimneys or Flues of Open or other Fire-places.
Year: 1890

page_text: Date of Application, 15th Feb., 1890
Complete Specification Left, 15th Nov., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in or applicable to Chimneys or Flues of Open or
other Fire-places.
I JOHN BENNISON of Lower Mossley Street Manchester in the County of Lancaster
Marble Merchant do hereby declare the nature of my said invention to be as
follows:-
The object of this invention is so to improve the construction of chimneys or flues,
that any tendency to "smoke" shall be obviated, by preventing "down draft,"
whether arising from syphonic influence (or natural air pumping) or through any
peculiar or special structural arrangements of the building, or from any other causes,
and also to provide a flue which under all convictions will be free. from defects.
It consists of a tube, built in the brickwork above the fire place and extending to
the roof or to apex of chimney or only part way up the flue and discretion, and may
be constructed of fire clay, metal or any other suitable material. The tube may be
of cylindrical, rectangular, square or any other suitable form in cross section.
$6
The bottom or mouth of the tube immediately above the fire is formed "cup" or
trumpet shaped" say at the front and sides-or may be of any other suitable and
convenient shape which gradually widens to the bottom-far more readily taking in
the smoke and products of combustion and leading them direct into the tube.
This mouth, or receiver being built into the brickwork-and either side of the fire
place opening at top being filled in with ordinary solid brickwork.
In the length of the tube and by preference near the top, I form an enlargement,
constituting an anti-syphon chamber, up which the tube extends a certain distance
the top of this chamber is arranged to continue to the top of chimney with either the
aforesaid tube or ordinary brickwork. By preference I make this chamber of one
piece but it may be formed of ordinary brick work. I find in practice, that a tube so
arranged with my improved receiver, and anti-syphon chamber as aforesaid effectually
prevents down draft.
In some cases I apply my receiver and anti-syphon chamber and the tube to
existing chimneys.
And the receiver and anti-syphon chamber may be applied without the tube at
discretion.
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or applicable to Chimneys or Flues of Open or
other Fire-places.
I JOHN BENNISON of Lower Mosley Street, Manchester, in the County of
Lancaster, Marble Merchant, do hereby declare the nature of my said 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 so improve the construction of chimneys or flues,
that any tendency to "smoke" shall be obviated and down-draught prevented,
whether arising from syphonic influence (or natural air pumping) or through any
peculiar or special structural arrangement of the building or from any other causes
and also to provide a flue which under all conditions shall be free from defects.
On the accompanying drawing Fig. 1 is a sectional elevation of my improved
chimney or flue and Fig. 2 is a transverse section of Fig. 1 (taken on line a-b) of
[Price 6d1

page_text: the anti-syphon chamber at the top of the same flue. Fig. 3 is a side sectional view
of the mouth or entrance portion of the flue shewn in Fig. 1, and Figs. 4 and 5 are
front and side sectional views respectively of my improved flue (on a smaller scale)
shewn fixed in position or built in the brickwork of the chimney stack.
Fig. 6 is a transverse section (on the line c-d) of Fig. 4.
In carrying out my invention I employ a tube or flue a constructed of fire-clay,
metal or other suitable material socketed together and of a cylindrical, rectangular,
square or other suitable form in cross section. This tube a is by preference built in
the brickwork as illustrated more clearly in Figs. 4 & 5 and extends either to the
roof or apex of chimney or may extend only part way up the flue as desirable.
"
"
"
The entrance or mouth piece b of this tube a is arranged immediately above the
fire and is formed of a cup or trumpet." shape say at the front and sides, as
"illustrated or may be of any other suitable shape which widens at the bottom so as to
more readily collect the smoke and products of combustion and lead them directly
into the tube or flue. This mouth or receiver is built into the brickwork and both
sides of the fire place opening at top are built in with solid brickwork as illustrated in
Figs. 4 and 5.
In the length of the tube a and by preference near the top 1 form an enlargement
or chamber c constituting my improved anti-syphon chamber, into and in the centre
of which the tube a extends upwards a suitable distance, say to about the position
illustrated in Figs. 1 and 4. The top of this chamber c being gradually reduced to
nearly the same diameter as the tube and carried up to the chimney top or the brick-
work forming the rest of, the flue. This anti-syphon chamber e so arranged intercepts
and checks any down current.
By preference I make the chamber c, all in one piece as illustrated but it may be
formed of the ordinary brickwork.
By so employing the tube a with the peculiar shaped mouth or receiver b, and the
anti-syphon chamber c I effectually prevent all tendency to smoke and down-draught
in a chimney as aforesaid.
These improvements are equally applicable to existing chimneys and in some cases
the receiver band anti-syphon chamber c are applied without the tube a.
Having thus particularly described and ascentained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1st. In a chimney or flue the employment of a tube constructed of fire-clay, metal
or other suitable material, provided at its lower end with a trumpet shaped receiver,
and at or near its upper end surrounded by an enlarged chamber, substantially as and
for the purposes herein before described and illustrated on the accompanying drawing.
2nd. In a chimney or flue the employment of my improved anti-syphon chamber and
trumpet shaped receiver either alone or in conjunction with a tube or flue, substantially
as and for the purposes hereinbefore described.
3rd. As a modification of my invention forming the enlarged chamber of the
ordinary brickwork substantially as and for the purposes hereinbefore described.
Dated this 14th day of November 1890.
JOHN G. WILSON,
Agent for the Applicant.