Improvements in or relating to Chimney Pots, Cowls, Ventilators, and the like.
Year: 1893

page_text: Date of Application, 5th June, 1893
Complete Specification Left, 27th Feb., 1894-Accepted, 31st Mar., 1894
Improvements in or relating to Chimney Pots, Cowls, Ventilators,
and the like.
I, WILLIAM HENRY HOLT of Prospect Hill, Turton near Bolton in the County
of Lancaster, Millwright, do hereby declare the nature of my said invention to be
as follows:-
:
This invention refers to improvements in or relating to chimney pots, cowls,
ventilators, and the like, and has for its object that of preventing or minimising
the nuisance arising from smoky chimneys caused by down-draught, also for
improving the ventilation of public buildings, railway carriages, and other places.
This I effect by providing the chimney pot or its equivalent with a centre passage;
the outside of same being provided with a number of angular or circular passages
of equal or unequal areas with their upper ends disposed on a level or above the
top or outlet end of the said centre passage, by which a screw or circular current
of air will be produced to cause or assist smoke or air to be readily drawn through
the same from whatever direction the wind is blowing. This invention is so
designed that it may be constructed of terra-cotta, metal, or other materials.
Dated the 2nd June 1893.
COMPLETE SPECIFICATION.
Improvements in or relating to Chimney Pots, Cowls, Ventilators,
and the like.
I, WILLIAM HENRY HOLT of Prospect Hill, Turton near Bolton in the County
of Lancaster, Millwright, 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 :-
This invention refers to improvements in or relating to chimney pots, cowls,
ventilators, and the like, and has for its object that of preventing or minimising the
nuisance arising from smoky chimneys caused by down-draught, also for improving
the ventilation of public buildings, railway carriages, and other places. This I
effect by providing the chimney pot or its equivalent with a centre passage; the
outside of same being provided with a number of angular or circular passages of
equal or unequal areas with their upper ends disposed on a level or above the top
or outlet end of the said centre passage, by which a screw or circular current of
air will be produced to cause or assist smoke or air to be readily drawn through
the same from whatever direction the wind is blowing. This invention is so designed
that it may be constructed of terra-cotta, metal, or other materials.
Fig. 1 1 is intended to represent an outside elevation of my improvements in or
relating to chimney pots, cowls, ventilators, and the like. Fig. 2 a plan, and Fig. 3
a sectional elevation.
The chimney pot or its equivalent A is provided with the centre passage B; the
outside of saine having the angular or circular passages C, of equal or unequal
areas, with their upper ends D disposed above the top or outlet E of the passage B.
If desired the ends D may be level with the top or outlet E, although not shown,
but I prefer to construct them as indicated in the drawings. By making the

page_text: passages C angular a screw like or circular current of atmospheric air will be
produced in the direction indicated by the arrows, which will cause or assist smoke,
or air, to be readily drawn through the passage B and passages C in whatever
direction the wind is blowing, by which the nuisance arising from smoky chimney-
caused by down-draught-will be prevented or reduced to a minimum, which is
the object of this invention. This invention is equally applicable for improving
the ventilation of public buildings, railway carriages, and other places; and may
be constructed of terra-cotta, metal, or other suitable materials, provided with
suitable means for securing same.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
In combination with a chimney pot or its equivalent, whether for chimneys or
ventilation, the use and construction of angular or circular passages C with their
upper ends disposed above the top E of the centre passage B or otherwise,
substantially as described and for the purposes set forth.
Dated the 24th February 1894.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.