Improvements in Chimney Cans.
Year: 1892

page_text: Date of Application, 3rd Sept., 1892
Complete Specification Left, 5th June, 1893-Accepted, 8th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Chimney Cans.
WILLIAM COOK of the Firm of William Cook and Sons, Roseburn Iron Works,
Murrayfield, Edinburgh, in the County of Midlothian, North Britain, Heating and
Ventilating Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention which relates to improvements in chimney cans has for its object
to cure smoky vents and consists in constructing a chimney can of sheet metal or
other suitable material having tubular or fluted sections so that on whatever side
the wind may strike it rushes up the flutes or passages causing a strong upward
current. Any number of channelled or fluted sections may be used as found most
suitable, each section being fixed to the upper & outside or fluted end of the section
immediately below it in a manner as to permit the wind to pass easily through the
channels forcing the smoke out with the chimney. An ornamental crown piece is
placed on the topmost fluted section. To prevent a blowdown I form of sheet metal
or other suitable material one or more sections of a chimney can or tube of a bowl
shape that is to say broader at one end than the other having both ends open, and
another piece of a cone shape closed at the top end, these I suitably connect
together and fixing the whole to the fluted chimney can above referred to, at a
suitable point above the crown piece, this when in position has the effect of pre-
venting a blow down that might otherwise take place, whilst the fluted chimney
can performs its work satisfactorily.
Dated this 31st day of August 1892.
D. DRYSDALE AUSTIN,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Chimney Cans.
WILLIAM COOK of the Firm of William Cook and Sons, Roseburn Iron Works,
Murrayfield Edinburgh, in the County of Midlothian, North Britain, Heating and
Ventilating Engineer, 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 which relates to improvements in chimney cans, consists in
constructing a chimney can of sheet metal or other suitable material, having
tubular or fluted sections, so that on whatever side the wind may strike, it rushes
up the flutes or passages, causing a strong upward current. Auy number of
channelled or fluted sections may be used as found most suitable, each section being
fixed to the upper and outside or fluted end of the section, immediately below it, in
such a manner as to permit the wind to easily pass through the channels forcing
the smoke out with the chimney. An ornamental crown piece is placed on the
topmost fluted section. To prevent a blow down I form of sheet metal or other
suitable material one or more sections of a chimney can broader at one end than
the other, having both ends open and another piece of a cone shape closed at the
top end, these I suitably connect together, and fixing the whole to the fluted section
of the chimney can above referred to has the effect of preventing a blow down.
In order that my said invention may be properly understood and readily carried
into effect I will now proceed to describe the drawings hereunto annexed.
Figure 1 is a part elevation and part vertical section of a chimney can having a
crown or ornamental top.

page_text: Figure 2 is an elevation of a chimney can in all respects the same as that
represented in Figure 1. having a single conical top.
Figure 3 is a similar view to Figure 2 illustrating a chimney can with a duplex
top as hereafter more fully referred to, all made in accordance with and constituting
my invention.
In carrying my invention into practice the chimney can is made in tubular
sections rigidly secured together.
In Figures 1, 2, & 3 the chimney can is shewn made in three pieces, these pieces
or sections are marked A. B & C. Each section having an upwardly increasing
circumferential area-to allow of the one below to fit thereon-is fluted, grooved or
indented as represented at D. D. D. in the direction of its length. At the
termination of each flute, groove or indentation D. D. D, a louvre opening E is
formed which directs the air which impinges against the can at any point or side in
an upward current as shown by the arrows in Figure 1. It will be seen that by
my aforesaid construction of a chimney can a free circulation or draught is always
maintained in all sorts of weather. To provide against any contingency of a blow
down, a conical top or baffle cover F is mounted upon the chimney can as shewn in
Fig. 2. As a modification of this arrangement a duplex form is shewn in Figure 3.
consisting of a lower conc or frustum of a cone G having its apex or frustum
provided with flutes or V shaped indentations g and an upper cone or baffle H
similar to the one shewn in Fig. 2.
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:
In a chimney can composed of metal or other suitable material, one, two, three
or more sections of tube provided with any number of flutes grooves or indentations,
formed circumferentially round each section in the direction of its length, and
terminating upwardly in louvre openings or passages for the circulation of the air,
in combination with a crown or conical top or cover or the combination of one or
both substantially as described and shewn.
Dated at Glascow this 2nd dow of Tune 1802
D. DRYSDALE AUSTIN,
135, Buchanan Street, Glasgow, Applicant's Agent.