Ventilating Flues, and the like.
Year: 1886

page_text: Ventilating Flues, and the like.
I, THOMAS WHITEHEAD, of 8 Nile Street, Liverpool, in the County of Lancaster,
Practical Doctor of Chimneys, 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 has for its object, a chimney pot or ventilator, which while
making use of the wind to cause an exhaust, or down draught, as the case may be,
prevents the wind from interfering with the required current.
It was originally protected under application No. 15506, dated December, 17th,
1885, but as one or two alterations have been made since the said application was
filed, it has been decided to file the complete specification upon a fresh application
and with a fresh date.
The invention is best described by aid of the accompanying drawings, in which
Figure 1 is a side elevation, Figure 2 section, and Figure 3, sectional plan, (taken
from below on line a―y Fig. 2).
On the end of the terminal shaft A, I place brackets B, carrying an oil box C,
and bearing D in which runs the spindle H of the hollow truncated cone E, or
in some cases drum G, armed with wind vanes F, preferably reversible all round,
and current vanes F. In practice I prefer a combination of a cone E, with a
cylindrical continuation or subsidiary drum G. This drum G, or the cone E in
other cases, ends preferably about the level of the top of the terminal A, but has a
much larger diameter. The space between these two diameters, and the interior of
the cone E is occupied by a series of vanes F1, attached to the cone or drum, or both,
which, if the wind vanes F are fixed, are fixed in either the same or the opposite
direction, according as an upcast or downcast draught is required. If the wind
vanes are reversible these can be fixed in one direction, and by simply reversing
the wind vanes, the apparatus can be made upcast or downcast at pleasure;
similarly if the wind vanes are fixed, and the current vanes are adjustable, the
same option is obtained. The spindle H can be hollow, so as to introduce oil at
the top, and in the current vanes, or the inner ring that unites them, runners
can be fixed having a bearing in the shaft that will take off the side wind strain
from the spindle bearings. These are not shown in the drawings, as except in very
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large ventilators they are useless. To take the strain off the top of the spindle, a
small cap J, with bearing K is placed above and supported and held fast by a series
of iron bars LL, attached to the shaft, and surrounding the cone. In order to
prevent the wind from beating into the apparatus between the drum and terminal,
I place a horizontal annular plate M round the shaft, about the diameter of the
drum G in outside dimension, and considerably beyond that, place an annular
cylindrical protecting drum N as shown, the space between the annular plate and
drum N, and therefore between the two drums being considerably greater in area
than the area of the shaft A, so as to prevent throttling; and also the area of the
imaginary continuation of drum G to the edge of plate M must also be greater
than the sectional area of A for the same cause.
The mode of action is as follows:-
The apparatus being erected as set forth in the drawings, and the bearings oiled,
the wind striking the outer vanes sets the cone E revolving, the vanes inside this
being the reverse way for chimney tops and ventilators, draw the air out. Any
wind striking the shaft is projected outward by plate M, and the wind crossing the
orifice between M and N causes an induced current tending to draw air or smoke
outward through this orifice, wind striking the cone E is projected upward, wind
striking G is in part projected downward, and passing the orifice between G and M
causes an induced current outward through the orifice, and carries the smoke
etcetera so sucked out, through the orifice between G and N.
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,―
1st. A chimney or ventilator top formed of a rotating cap E, G, armed with
wind vanes, to catch the wind, and be impelled by it, and internal exhausting
vanes, both sets of vanes being attached to the same cap, and rotating with it, in
combination with exterior wind guards, substantially as described.
2nd. In combination with a cap E, G, a horizontal flange M, and a vertical
drum N arranged substantially as, and for the purposes described.
3rd. The manufacture of chimney or ventilating tops, constructed and arranged
substantially as herein described.
1000