Year: 1894

page_text: Date of Application, 29th Dec., 1894
Complete Specification Left, 29th, May, 1895-Accepted, 3rd Aug.. 1895

page_text: 3, 5, 6 and 7 consists of two semi-cncular or U-shaped parts which overlap each
other with vertical joints, and are pivoted together by means of a rivet a¹ at the
upper part of the lap joint on each side. By this means the two parts of the
chimney tube are enabled to more inside the chimney relatively towards and away
from each other, by pivoting about the rivets, whilst then fice ends or lap joints
can be pressed together, so that they are flexible or capable of yielding in
vations duections. Thus for example, in expanding by heat, they will be pressed
together as shown in Fig 6 by means of dash-dotted lines. By this means the
masomy and plaster coating of the chimney is protected from disturbance or
destruction The spindle support c
is attached to the chimney tube a by
means of screws c', and is hent above the chimney tube in such a manner as
not to interfere with the flexibility of the said tube a. This spindle support e is
vetted to the inside wall of the suction cone The suction cone is composed
of three, fou o more separate portions of a cone surface each having one end
bent out so as to form an upwardly inclined vane b', which serves, first, to catch
the wind and lead it underneath the rowl, and, secondly to stiften the shell of the
The construction of the suction cone in several parts allows of
very economical utilization of the sheet metal necessary therefor
suction cone
Between the chimney tube a and the base of the suction cone there is a free
space in a horizontal ducction, and the chimney tube a projects for 2 to 3 c/m
beyond the base of the suction cone. Sufficient space for the two bends of the
spindle support is afforded by suitable cut-away portions a² of the walls of the chimney
tube a.
The free space between the base of the suction cone and the chimney
tube a is filled with cement or lime moitar, as shown in Fig 1, and thus a
secure and durable connection is effected between the cowl and the chimney. The
spindle support e forms at its upper end extending beyond the suction cone b, a
budge in the centre of which the spindle for carrying the hood is secured by
means of a nut and locknut The hood is composed of two parts the slightly
inclined upper cover and the steeply inclined lower cover 1. The lower cover is
of parabolic shape in cross section, and is bridged over, with a sickle-shaped
intervening space, by the upper cover, which together with the weather rane, is
made so short that two OL more chimneys of any desued size of opening in the
clear, situated side by side or close together in groups, being separated from each
other only by the width (120 m/m) of a single brick, can be provided with o
surmounted by conls according to this invention, without the free movement of
such cowls being at all hindered. The upper cover and the lower cover 2 are
connected together at then lower ends by means of two rivets 2¹ The second
connection of the two with each other for the purpose of forming a rigid whole,
and also for counterbalancing the preponderance of weight towards the vane side,
is effected as follows The vane is made of a piece of sheet metal which 18
bent together along its central axis so as to form a tube to surround the
spindle d, and its ends are formed into two saues attanged at an angle to each
other, and provided with bottom lugs "The latter are rivetted to the upper
cover . The spindle sleeve f¹ is closed together by means of rivets / as shewn
it caries at its upper end the cast iron cap g which is secured by means of a livet g¹
and at its lower end is secured by the brace which is perforated for the purpose
of giving passage to and gunding the spindle d, and is bored out at h¹ to form a
footstep bearing.
B
'
This brace is bent in such a manner as to pass obliquely through the upper
cover k, and it is connected by means of a rivet with the lower cover, This
attachment has for result that the upper cover cannot shift on the brace h, and
therefore the upper Covel cannot shift relatively to the lower Covel i
Consequently the covek is held on the brace only by sumple oblique
deflection.
The brace thus serves as a lower guide for the spindle d, as a means for
closing the lower end of the spindle sleeve, and also as a means of attachment
of the spindle sleeve to the cover k and as a detail of the connection of the upper

page_text: cover with the lower cover
It is made of such length and width and thickness,
that is to say, of such weight as to constitute a counterbalancing weight for the
one-sided action of the preponderance of weight of the vane side of the cowl hood.
In a cowl of this kiud, since the bearings or points of support lie outside the hood,
choking of the bearings by soot is entirely obviated. Furthermore the manufacture
of the cowl is extremely cheap, the destruction of the chimney stacks by the
boed is obviated, and the setting of the same in the masonry is extremely
simple.
Figs 8 and 9 illustrate three cowls mounted side by side
The wind vanes or guides of the suction cone baie, in the case of rectangular
chimneys, situated dingonally to the corners of the chimney
Whatever may be
the direction of the wind, the wind is caught and led upwards into the cowl hood.
The entrance of the wind into the hood, takes place obliquely fist, as indicated by
the arrow I, between the suction cone and the lower cover t, and, secondly, as
indicated by the arrow II, between the lower cover and the upper cover 4,
whilst the smoke is continually sucked up and duiven away As the wind, in con-
sequence of the angular position of the two weather vanes, acts upon a double
sui face, and stukes always obliquely against this latter, the weather vane will
always readily assume its proper position, and will at once obey any valuations in
the direction of the wind, whilst the mode of suspending the spindle renders the
hood extremely sensitive.
Dated this 29th day of December 1804
L
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W C., Agent for the Applicant
I, HUGO JOIN of the Fum T. A. John, of 8 Pilse, Erfurt, Germany, Manu-
facturer, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertamed
the following statement.—
and by
.
This invention relates to chimney cowls so constructed that, in mounting such
cowl on a chimney it can be firmly attached thereto by cement of lime moi tai, but will
nevertheless be capable of expanding and contracting, in consequence of differences of
temperature, without disturbing or destroying the masomy of the chimney. Further-
more, several such cowls can be placed close together on a chimney stack, whereof the
chimmies nie separated from each other only by say the width of a buck, or about
120 millimetres without the hoods of the cowls being hindered in their movements
Moreover the construction is such that an energetic suction of the smoke is
produced by the hood of the cowl which is suspended and supported outside the
scope of action of sinoke and soot, so that choking of the bearing surfaces with soot
is entirely obviated. There is also provided an extremely sensitive weather cock or
vane having two wind faces arranged at an angle to each other. The hood of the
cowl itself, consists only of two parts. whilst the brace of the said hood serves
simultaneously as a means for excluding soot from the bearings, as a means of
attachment for the upper part of the hood to the under cover piece of the same, as
a lower bearing or guide on the spindle, and as a counter weight for balancing the
top-heaviness of the hood resulting from the one-sided rangement of the weather
vane. A further advantage lies in the fact that the spindle foot-piece or support
carries not only the chimney tube which is situated inside the chimney and serves
as an attachment from the hood, but also the suction cone, which is provided with
a vane.

page_text: Fig. 2 an elevation,
Fig. 3 a horizontal section on the line A 13 of Fig 1,
Fig 4 a horizontal section on the line C D of Fig 2, and
Fig 5 a horizontal section on the line EF of Fig. 2 the chimney tube being
atranged to be of circular cross-section instead of square as the previous
hgures.
Fig 6 is a vertical section, and Fig. 7 a plan, likewise illustrating the application
of my improved cowl to a cicular chimney tube
Figs. 8 and 9 illustrate three cowls arranged close together, the chimney tubes
of which are situated at a distance one from the other of only the width
(120 centimetres) of one buck.
As will be seen on reference to the drawings the cowl comprises the following
parts,—tez., a divided or split flexible chimney tube a designed to be inserted t
top of the chimney, a suction cone 5 with wind vanes 6', a spindle foot or supporte
which is vetted to the suction cone b, and is also disconnectably fastened to the
chimney tube a by means of screws c', a spindle d; and the rotary hood or cowl
proper The latter consists of a lower cover and an upper cover, and is provided
with a vane or weathercock, and a spindle cap g These parts are constructed
and arranged in the following manner -The chimney tube a, Figs. 1, 3, 5, 6,
and consists of two channel or semi-circular shaped parts which overlap each
other with vertical joints, and are pivoted together by means of a veta at the
upper part of the lap joint on each side. By this means the two parts of the
chimney tube are enabled to move inside the chimney relatively towards and away
from each other, by pivoting about the said vets, whilst then free ends or lap
Joints can be pressed together, so that they are flexible or capable of yielding in
various directions. Thus for example, in expanding by heat, they will be pressed
together as shown in Fig. 6, by means of dash-dotted Imes. By this means the
masouny and plaster coating of the chimney is protected from disturbance of
destruction. The spindle support is attached to the chimney tubo a by means
of the screws c' as aforesaid, and is bent above the chimney tubo in such a manuer,
as shown, as not to interfere with the flexibility of the said tube a. This spindle
support 13 vetted to the inside wall of the suction conc b The suction cone bis
composed of three, four or more separate portions of a cone surface, each having
one end bent out so as to form an upwardly mchined vane b, which serves, first, tu
catch the wind and lead it underneath the cowl, and secondly, to stiffen the shell
of the suction cone. The construction of the suction cone in several parts allows
of very economical utilization of the sheet metal necessary therefor
Between the chimney tube a and the bise of the suction coue there is a frec
space in a houzontal duection, and the hunney tube a projects upward to the
extent of 2 to 3 cm beyond the base of the suction conc. Sufficient space for
the two bends of the spindle support is afforded by suitable slots a² in the walls
of the chimney tube a The free space between the ba-e of the suction cone and
the chimney tube a is filled with cement or lime mortat, as shown in Fig. 1, and
thus a secure and durable connection is effected between the cowl and the chimney
The spindle support e forms at its upper end, extending beyond the suction cone b,
a bridge in the centre of which the spindled to carrying the hood is secured by
means of a nut and locknut as shown The hood is composed as herembefore
stated of two parts, viz the slightly inclined upper cover, and the steeply
inclined lower cover 1. The lower cover is of parabolic shape in cross section, and
is budged over, with a sickle-shaped intervening space by the upper cover,
which, together, with the weather vane /, is made to extend outwards to so slight
an extent that two or more chimneys of any desned size of opening in the clear,
situated side by side or close together in groups, and separated from each other
only by the width (120 cm.) of a single brick, can be provided with or surmounted

page_text: by cowls according to this invention, without the free movement of such cowls
being at all undered
The upper cover and the lower cover 2 are connected together at their lower
ends by means of two iivets The second connection of the two pairs with
each other, to the purpose of forming a rigid whole, and also for counter-
balancing the preponderance of weight towards the vane side, is effected as
follows
-
The vane is made of a piece of sheet metal which is bent together along its
central axis so as to form a tube to smround the spindle d. and its ends are
formed into two vanes arranged at an angle to each other, aud provided with
bottom lugs which are rivetted to the upper cover K. The spindle sleeve f¹ is
held closed by means of vets ns shewn, and caries at its upper end the cast
non cap which is secured by means of a rivet g
f,
which is perforated for
and is bored out or
This brace is bent.
At its lower end the said sleeve is secured by the brace
the prose of giving passage to and guiding the spindle
recessed at to form a foot step bearing for the said sleeve.
as shown, in such a manner as to pass obliquely through the upper cover &, and it
is connected by means of a vet to the lower cover This attachment has for
result that the upper cover k cannot shift on the brace, and therefore the upper
cover cannot shift relatively to the lower cover. Consequently the cover is
held on the brace h only by simple oblique deflection
The brace thus serves as
& lower guide for the spindle d, as a means for closing the lower end of the
spindle sleeve', and also as a means of attachment of the spindle sleeve to the
cover, and as a detail of the connection of the upper cover with the lower
Cover 2. The said brace is made of such length width and thickness, that is
to say of such weight, as to constitute a counterbalancing weight for the
one-sided action due to the preponderance of weight of the vane side of the
cowl hood
In a cowl of the hind described since the bearings or points of support lie
outside the hood, choking of the bearings by soot is entirely obviated Further-
more the manufacture of the cowl is extremely cheap; the destruction or damage
of the chimney stacks by the hood is obviated, and the setting of the same in the
masoury is extremely simple.
Figs 8 and 9 illustrate three cowls of the kind herein before described, mounted
side by side.
The wind vanes on guides of the suction cone are, in the case of
rectangular chimneys, situated diagonally or in the duection of the corners of
the chimney.
Whatever may be the direction of the wind. the wind is caught and led
upwards into the cowl hood. The entrance of the wind into the hood takes
place obliquely, first, as indicated by the arrow 1, (Fig. 1) between the suction
cone and the lower cover, and, secondly, as indicated by the arrow II, between
the lower cover and the upper cover, smoke being continually sucked up the
chimney and driven away.
As the wind, in consequence of the angular position of the two sides of the
weather vane facts upon a double surface, and strikes always obliquely against
this latter, the weather vane will always readily assume its proper position, and
will at once obey any variations, in the direction of the wind, whilst the mode of
suspending the spindle renders the hood extremely sensitive.
Having now particularly described and ascertained the nature of the said mven-
tion and in what manner the same is to be performed I declare that what I
claim 16
-
1 A cowl comprising a rectangular or circular chimney tube a made in two
parts capable of rotation relatively to each other and flexible as to its free lap-
joint flanges or edges, a suction cone adapted to rest on the chimney and made of
two or more segments provided with beut wind vanes 6', a spindle foot or support o

page_text: T'
that carries a spindled and is connected to the said suction conc. and chimney tube,
and is bent fiom one piece of material, a hood having its point of suspension
outside of the scope or range of soot, formed with two entrances for the wind, and
having its upper cover A connected with its lower cover by 'means of a brace, and
a'weather vane having forined in one piece therewith a spindle sleave that
carries a cap g and is surrounded at its lower end by the said brace, the said
weather vane consisting of two blades or plates vetted to the upper cover k,
arranged at an angle to each other and of such dimensions that the cowl when in
use will not have its movements thindered by a similar cowl or cowls applied to
an adjacent chimney or chimneys even when the openings in the said chimneys
are separated from each othic only by the thickness of a brick, substantially as
herein described.
2. In the cowl specified in Claim 1, the arrangement of the chimney tube a in
such a manner that between it and the suction cone b, there is left a free space
that is adapted to be filled up with cement or lime mortal for the purpose of
connecting the cowl to a chimney.
3. In the cowl specified in Claim 1, the brace having its footstep bearing
arranged outside of the range of soot and encircling the lower part of the spindlo
sleove f, and arranged to also pass obliquely through and maintaining the cover k
in position and serve as a means of attachment for the lower cover 1, the said brace
being made of such 'dimensions as to counterbalance the one-sided weight of the
hood caused by the weather vane as set forth.
4. The impioved cowl constructed as described and shown.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W C., Agent for the Applicant.