IMPROVEMENTS IN CAPS FOR VENTILATOR AND CHIMNEY SHAFTS
Year: 1878

page_text: LETTERS PATENT to Henry Willington, of South Kensington, in the County
of Middlesex, Physician, for the Invention of "IMPROVEMENTS IN CAPS FOR
VENTILATOR AND CHIMNEY SHAFTS."
aled the 9th August 1878, and dated the 20th February 1878
PROVISIONAL SPECIFICATION left by the said Henry Willington at the
Office of the Commissioners of Patents on the 20th February 1878.
HENRY WILLINGTON, of South Kensington, in the County of Middlesex, Physician.
"IMPROVEMENTS IN CAPS FOR VENTILATOR AND CHIMNEY SHAFTS."
The improvements consist in constructing said caps of cylinders or chambers of
reticulated wire, with tops reticulated or otherwise, arranged in or constructed with
facets or otherwise, with or of varying or equal meshes, using sometimes only one
or two or more of such chambers one within the other.
Also in making the outer cylinder or chamber, or the single chamber when one
only is used, to revolve with the wind by means of a vane or vanes or other similar
contrivance, and present the facet or surface containing the finer meshes or other-
wise to the wind, and so causing the wind to be dilated and deflected before it
comes in contact with the inner chainber or shaft aperture.
Also in furnishing such chambers when desired with an inner cap of reticulated
wire constructed with finer meshes than those of the enveloping chamber or chambers,
and so arranged that it can be suspended conveniently within and actuated up and
down by a chain and pulleys or other suitable contrivance, and close the shaft
aperture when the up draught is not sufficient to prevail against the down
draught.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Henry Willington in the Great Seal Patent Office on the 19th
August 1878.
HENRY WILLINGTON, of South Kensington, in the County of Middlesex, Physician.
"IMPROVEMENTS IN CAPS FOR VENTILATOR AND CHIMNEY SHAFTS."
The improvements consist in constructing ventilator and chimney caps of cylinders
or chambers of reticulated wire, with tops reticulated or otherwise, arranged in or
constructed with facets or otherwise, with or of varying or equal meshes, using
sometimes only one, or two, or more of such chambers one within the other.
Also in making the outer cylinder or chamber, or the single cylinder or chamber
when one only is used, to revolve with the wind by means of a vane or vanes or
other similar contrivance, and present the facet or surface containing the finer
meshes or otherwise to the wind, and by one or more of these methods causing the
wind to be dilated and deflected before it comes in contact with the inner chamber
or shaft aperture.
Also in furnishing such cylinders or chambers when desired with an inner cap or
lid or chamber of reticulated wire constructed with finer meshes than those of the
enveloping chamber or chambers, and so arranged that such cap, lid, or chamber
can be suspended conveniently within the cylinder or chamber proper, and actuated
up and down by a chain and pulleys or any other suitable contrivance, and made
to close the shaft aperture when the up draught is not sufficient to prevail against
the down draught.
The Drawing hereunto annexed will serve to illustrate a convenient mode or
modes of carrying the Invention into practical effect, but the details, shapes, and
sizes of the various parts may be varied to suit circumstances without departing
from the nature of the Invention; for instance, a stack of two or more chimneys
may be treated with one enveloping chamber, and seperate drop caps or chambers
for each shaft or chimney.
In the Drawing Fig. 1 is a general perspective view, showing a short revoluble
overall on the top of a stationary overall; Fig. 2, section of same.
Fig. 2a, sectional elevation, with enveloping chamber omitted.
Figs. 3 and 4 are long enveloping chambers or overalls.
Fig. 5, perspective elevation, with overall removed.
Fig. 6, a revoluble screen or overall.
Fig. 7, a lid with long. cylinder attached for dropping into shaft.
Fig. 8, a small meshed cylinder to be used with a cap in lieu of drop cylinder,
Fig 7
Fig. 9, meshed wire inner drop cap.
Fig. 10, a drop lid, which is balanced by equal weight of chain.
Fig. 9, meshed wire inner drop cap.
Fig. 10, a drop lid, which is balanced by equal weight of chain.
Fig. 11, holdfast cylinder.
In the Figures like letters indicate like parts.
A is the drop lid; B is holdfast cylinder; C, small meshed cylinder; D, inner
meshed wire cylinder; E, overall ; F, screen; G, meshed wire cap; H, drop cylinder;
K, friction rollers; L, chimney or ventilator shaft.
The action may be best gathered from Figs. 2 and 5, shewing an inner and outer 4
meshed wire smoke chamber, E the outer or overall being revoluble by the wind.
When there is no fire, and ventilation is desired, or supposing the apparatus fitted
to a ventilator shaft only, I moderate the action by actuating the drop cap and its
appurtenance, and bring the cap to the level of X or Y, or I close the shaft.
In witness whereof, I, the said Henry Willington, have hereunto set my hand 5
and seal, this Nineteenth day of August, A.D. 1878.
TITTY T TVATON