Improvements in Cowls for Chimneys, Air Shafts, or of Foul Air Extractors.
Year: 1893

page_text: Date of Application, 27th Apr., 1893
Complete Specification Left, 29th Jan., 1894-Accepted, 7th Apr.. 1894
PROVISIONAL SPECIFICATION.
Improvements in Cowls for Chimneys, Air Shafts, or of Foul Air
Extractors.
I JESSE KIRKMAN of Park Place Chorley in the County of Lancaster Steam
Packing Manufacturer do hereby declare the nature of this invention to be as
follows:-
This invention relates to the construction of cowls for increasing the draught in
chimneys air shafts or of foul air extractors.
In my invention I make a cylinder or taper pipe of earthenware or metal and on
one side of this cylinder or taper pipe I form a junction pipe preferably of the same
material. Across this junction pipe I place a bar of metal to the centre of which
I attach a pivot or spindle on which is a shoulder or collar and I secure the ends
of the bar to the sides of the junction pipe with rivets bolts cement or other means.
Inside one end of the cylinder or preferably the larger end of the taper pipe
I fix a disc obliquely preferably of the same material the upper extremity of which
may extend to or beyond the centre of the junction pipe and nearly to the top of
the cylinder or taper pipe. I attach a vane on the top of the narrower end of the
taper pipe or to one end of the cylinder.
I then construct an extension pipe or I may use a chimney pot or metal pipe of
a less diameter than the junction pipe across which I place one or more metal
bars at convenient distances with holes through the centres of each to receive
the spindle or pivot referred to the ends of the bars being secured to the sides of
the extension pipe chimney pot or other pipe by rivets bolts cement or other means
or I may make an oblong metal box open on two opposite sides which is fixed in
the extension pipe chimney pot or other pipe by two arms extending from the box
at right angles to it, the arms being secured to the extension or other pipe by bolts
rivets or cement. I perforate the ends of the box to receive the pivot or spindle
referred to in the junction pipe.
I then insert the pivot or spindle attached to the cross bar of the junction pipe
into the holes in the cross bar or bars in the extension pipe chimney pot or other
pipe or into the perforations in the ends of the metal box attached to the said pipe
and the cowl is then set at liberty to revolve in a horizontal position on the extension
pipe chimney pot or other pipe.
1
CA 1000
COMPLETE SPECIFICATION.
Improvements in Cowls for Chimneys, Air Shafts, or of Foul Air
Extractors.
I, JESSE KIRKMAN of Park Place, Chorley in the County of Lancaster, Steam
Packing Manufacturer, 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 the construction of cowls for increasing the updraught
in chimneys, air shafts or of foul air extractors.

page_text: And in order that my invention may be the better understood I have appended
the accompanying sheet of drawings in which
.
Figure 1 represents a side elevational view of my improved cowl and Figures 2
and 3 a sectional and front view respectively of same.
Like letters of reference indicate corresponding parts throughout the several
views.
In accordance with my invention I construct my improved cowl in the following
manner; that is to say-1 employ a cylindrical pipe a either straight or tapered,
of earthenware or metal, to which is secured in a vertical position a junction pipe b
preferably of the same material, and, to the above mentioned cylindrical pipe a is
adapted the usual vane c of any suitable formation. I also secure, obliquely, to the
inside of the cylindrical pipe a a disc d preferably of the same material, the upper
extremity of which may extend to or beyond the centre of the junction pipe 6 and
nearly to the top of the cylindrical pipe a. The above referred to junction_pipe b
has a T shaped piece of metal e which is secured to the inside of the same by nuts,
cement or other means, in apertures provided for that purpose as shown Figure 2.
I also employ an extension pipe f of earthenware or metal, of less diameter at
the top than the second above referred to junction pipe ; and, to the inside of
which I secure by nuts, cement or other meaus, the frame y composed of a series of
metal bars of oblong formation; the top and bottom of said bars have holes pierced
therethrough so that when the bottom part of the cowl is placed over the last above
referred to pipe the depending portion of the T shaped piece of metal e passes
through the holes formed in the frame and is then locked when the cowl is at
liberty to freely revolve in a horizontal position with the wind.
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 cowls for chimneys, air shafts or of foul air extractors the employment of
the obliquely fixed disc d together with the means employed upon which the
cowl revolves, composed of the T-shaped piece of metal e and frame all
substantially as and for the purposes herein described and shown in the accom-
panying sheet of drawings.
Dated this 27th day of January 1894.
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,
Agent for Applicant.