Improvements in the Formation of Chimney Pots and Smoke Vents, applicable also to the Ventilation of Buildings.
Year: 1892

page_text: Date of Application, 17th Oct., 1892
Complete Specification Left, 16th Feb., 1893-Accepted, 18th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Formation of Chimney Pots and Smoke Vents,
applicable also to the Ventilation of Buildings.
I JAMES HENRY HEAP of 8 St. James' Street, Accrington, in the County of
Lancaster, Accountant, do hereby declare the nature of this invention to be as
follows:-
My said invention relates chiefly to a new formation of chimney pot or smoke
vent and is intended to operate so as to increase upward draught and cure smoking
and defective chimneys. Previous to my invention it has been a common practice
to form chimney pots with inducing passages so arranged as to direct the wind
upward through the top of the pot and so improve the upcast.
According to my invention I also form wind directing passages on or in the sides
of the pot or vent but instead of carrying such passages straight up as formerly, I
cause them to assume a spiral formation so that they discharge spirally revolving
upward currents of air into the upper part of the chimney pot or vent.
It is well known that the application of this rifling or cyclonic principle to the
propulsion of fluids adds greatly to the strength and constancy of the currents so
set up and in the present instance the effect of these spirally revolving inducing
currents is to cause a more powerful upcast and draught in the chimney than is
obtainable by straight inductive passages.
The chimney pots or vents to which my invention is applied.may be of clay or
metal or of any other suitable material.
In addition to its uses in combination with chimney pots and smoke vents my
invention might also be applied as a ventilator to withdraw vitiated air from rooms
and buildings.
Dated this 14th day of October 1892.
:
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.
COMPLETE SPECIFICATION.
Improvements in the Formation of Chimney Pots and Smoke Vents,
applicable also to the Ventilation of Buildings,
I JAMES HENRY HEAP of 8 St. James' Street, Accrington, in the County of
Lancaster, Accountant, 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 and accompanying drawings:
My said invention relates chiefly to a new formation of chimney pot or smoke
vent and is intended to operate so as to increase upward draught and cure smoking
and defective chimneys. Previous to my invention it has been a common practice
to form chimney pots with inducing passages so arranged as to direct the wind
upward through the top of the pot and so improve the upcast.
According to my invention I also form wind directing passages on or in the sides
of the pot or vent but instead of carrying such passages straight up as formerly I
cause them to assume a spiral formation so that they discharge spirally revolving
upward currents of air into the upper part of the chimney pot or vent.
In addition to its uses in combination with chimney pots and smoke vents my
invention might also be applied as a ventilator to withdraw vitiated air from rooms
and buildings.
In order that my invention may be clearly understood I will now proceed to

page_text: describe the same more fully, referring at the same time to the annexed sheet of
drawings.
Fig. 1 is an outside view of a chimney pot made in accordance with my
invention.
Fig. 2 is a vertical section of Fig. 1, it being understood that the section of the
rified passages follows the dotted line A. B. in Fig. 1.
The pot is made of clay, metal or other suitable material and is formed with side
inducting passages a which are of the spiral shape shown in Fig. 1. These
inducting passages a are open at the foot a to the atmosphere and after curving
spirally around the pot to a sufficient degree they terminate in discharge apertures a²
opening into the interior of the pot as very clearly shown in Fig. 2.
When my
improved pot is in use, the wind blowing against the side of the pot is diverted into
the curved side passages a and rushes up the same in the manner indicated by the
arrows. In flowing up the spiral passages a these air currents acquire a whirling
cyclonic movement which is continued when they are discharged into the pot and
the whirling impetus thus imparted to the upcast prevents downdrafts and draws
the smoke out of the chimney.
It is well known that the application of this rifling or cyclonic principle to the
propulsion of fluids adds greatly to the strength and constancy of the currents so
set up and in the present instance the effect of these spirally revolving inducing
currents is to cause a more powerful upcast and draft in the chimney than is
obtainable by straight induction passages.
Any suitable number of the described spiral induction passages might be applied
to the improved chimney pot and the pitch and length of such passages may be
greatly varied.
The principle of my invention is also applicable to ventilator upcasts for with-
drawing vitiated air from rooms and buildings.
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 :-
Forming chimney pots and ventilator upcasts with spirally shaped induction side
passages for the purposes and substantially as herein before described and shown.
Dated this 15th day of February 1893.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.