Improvements to Chimneys and Ventilating Shafts.
Year: 1896

page_text: Date of Application, 6th Feb., 1896
Complete Specification Left, 6th Nov., 1896-Accepted, 6th Feb., 1897
PROVISIONAL SPECIFICATION.
Improvements to Chimneys and Ventilating Shafts.
ALFRED RANSOM 15 Downing Street Farnham Surrey Sanitary Engineer do
bereby declare the nature of this invention to be as follows:-
The application of air shafts (constructed of metal, earthenware, bricks, or other
suitable material) to any chimney, air flue, cowl, or the like, to counteract any
tendancy to down-draught. Air shafts are carried from any convenient place,
(if possible from an air propelling fan, or from any exposed position where they
may catch the full force of wind), to the top or exit of any chimney, flue, or the
like, and attached thereto so as to cause a strong current of air to play upwards on
the exterior of such flue and thereby cause an upward current inside the same.
The airshafts may be used in conjunction with my patent cowl No. 3785
A.D. 1894 by carrying them to under the bottom louvre of cowl, or in conjunction
with any other suitable cowl or chimney pot.
By the term "airshaft" is meant a tube, flue, or passage, (either rectangular,
round, or any convenient shape) constructed to conduct a current of air from any
desired point to the top of the chimney or flue to which it is required to apply the
improvement. The air shaft may be only one foot in length or 100 feet or more
according to circumstances.
Dated this 11th day of March 1896.
ALFRED RANSOM.
ALFRED RANSOM 15 Downing Street Farnham Surrey Sanitary 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 :-
Airshafts or tubes are constructed of any suitable material, and carried from any
position or place (where they may receive the full force of the wind, or of an
induced current of air) to the top, or exit of any chimney, ventilating flue, cowl
or the like, and placed in such a manner as to cause the current of air in airshaft
or tube to play upwards on the exterior of aperture at the top of such chimney,
ventilating flue, or the like, and thereby cause an upward current, through
aforesaid aperture.
The airshafts or tubes may be any length, size, or shape, and their course
adapted to circumstances in various ways. For instance, a disused flue may be
made use of to form an air passage as far as its course would permit, and a
metal or other tube inserted and carried from thence to wherever required, or
if the chimney or flue itself is sufficiently large the airshaft, or tube may be
dropped inside it to any required distance, and another tube inserted through side

page_text: of chimney or flue to meet it, and carried from thence to any desired position, or a
tube could be dropped into chimney or flue and the space round it used as airshaft.
Where it is desired to use a funnell or cowl on the top of a chimney or flue, the
airshaft may be carried to the top of such funnell or cowl by forming an outer and
inner funnell and using the space between the two as airshaft, or the airshaft could
be formed on one side.of the funnell.if desired.
The airshafts may be used in conjunction with my patent cowl No. 3785/94 or
with any other suitable cowl or chimney pot.
Fig. 1 represents two out of the many ways in which the airshafts may be applied
to chimneys: A is top of chimney shaft. B top of airshaft. C is airshaft
applied from outside of masonry. D is airshaft placed insideu masonry to any
convenient distance down. E is a section through chimney and airshafts. The
outer shaft B may be made to extend only half way round /A and may be concealed
in masonry. The lower-ends of airshafts may be carried to any point desired, or if
necessary with branches to any, number of different points, .to catch the wind in
different directions, or may be provided with a revolving inlet to effect the same.
Having now. fully 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 :-
The application of airshafts or tubes to chimneys or ventilating flues substantially
in the manner as herein before described.
Dated this Fifth day of November 1896
ALFRED RANSOM.