An Improvement in Ventilators for Chimneys and Air Shafts.
Year: 1896

page_text: Date of Application, 16th June 1896
Complete Specification Left, 28th Aug., 1896-Accepted. 10th Oct., 1896
PROVISIONAL SPECIFICATION.
An Improvement in Ventilators for Chimneys and Air Shafts.
JOSEPH WEST 289 Shalesmoor Sheffield Sanitary Engineer JOHN THOMAS
WOODHOUSE 183 Penistone Road Sheffield Mechanic do hereby declare the
nature of this invention to be as follows:-
We construct of iron or any suitable material a ventilating head or covering
which we place at the top of chimney or air shaft and in order to assist the outlet
of said chimney or air shaft we propose in the following manner to produce a
vacuum which is intended expressly to accelerate the uplifting of vitiated air from
any chimney or air shaft aforesaid. And in order to gain this object we place side
by side vertically 3 or more oblong sheets or plates which being so placed in
position as to leave an opening between each one and the next adjoining it will
allow space for the outer current to pass through causing a vacuum at the top of
said chimney or shaft thereby assisting the internal or vitiated air to pass out
more rapidly. But to more particularly explain our improvement in ventilators
we further state that when these said sheets are placed in position they represent
a tripod or crown according to the number of sheets or plates employed and this
formation we repeat by a number of larger sheets being placed outside thus
forming one tripod or crown outside the other and as the wind passes through the
openings of outer crown past the openings of inner crown a vacuum is formed and
thereby the congested chimney or air shaft is immediately relieved and the said
vitiated air is uplifted as intended and as our invention thus utilizes the current
from any direction it consequently follows that any back current or down draft is
impossible.
Dated June 10/96
JOSEPH WEST.
JOHN THOMAS WOODHOUSE.
An Improvement in Ventilators for Chimneys and Air Shafts.
JOSEPH WEST 289 Shalesmoor Sheffield Sanitary Engineer JOHN THOMAS
WOODHOUSE 183 Penistone Road Sheffield Mechanic 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:-
We construct of iron or any suitable material a ventilating head or covering
which is intended to accelerate the uplifting of foul or vitiated air from any
chimney or air shaft.
The construction of which said head or covering is as follows. We first form
a number of concave or elliptical shields or plates A A. These said shields we
place in a vertical position side by side at a sufficient distance apart from each
other and then secure them by means of rivets or bolts to the shaft C, at its outlet
or top or near the top; and further we secure aforesaid shields A A to each other
at their highest point by similar means as before mentioned, and the spaces or
openings BB are intended to utilize the outside current from whatever direction it

page_text: may impinge on the shields A A, and allow said current to pass through said
openings B B, thus causing a vacuum or escape radius at the outlet of aforesaid
shaft C.
Having now more particularly described our chimney cowl or head Fig. 1 we
proceed to describe the ventilating head Fig. 2, which is intended for railway
carriages public buildings and the like.
We further apply and affix a number of shields A A which we place outside the
previously described cowl or head Fig. 1 and immediately over the openings B B
forming Fig. 2, so as to preclude the admission of down draught, raiu, sleet, or
any offensive matter, from entering shaft C; and when these outer shields A A are
impinged by the outer current the said current will be deflected and will enter the
openings B B and thereby create a vacuum as aforesaid.
Having now more particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed we declare that
what we claim is;
1. The use of a crown shaped chimney cowl as in Fig. 1 of our drawings, of
four concave elliptical shields or deflectors, secured in a vertical position at the
bottom of said shields to shaft C, and at the top to each other by means of rivets
or bolts.
2. And in Fig. 2 of our drawings the use of eight such shields A. A placed
similarly together that is to say having placed four in position as in Fig. 1 we
place other four outside those and immediately over the openings B B, or spaces
formed by their being placed some distance apart from each other as shown in the
accompanying drawings and by this means we allow space for utilization of outer
current from any direction whatever, consequently producing a vacuum at the
outlet of air shaft C, and thereby effectually uplifting the congested air as
desired.
Dated this 26th day of August 1806
JOSEPH WEST.
JOHN THOMAS WOODHOUSE.