CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF VENTILATORS AND CHIMNEY TOPS
Year: 1879

page_text: LETTERS PÅTENT to Henry William Heale, of Brixton Rise, in the County of
Surrey, for the Invention of "CERTAIN IMPROVEMENTS IN THE CONSTRUCTION
OF VENTILATORS AND CHIMNEY TOPS."
Sealed the 9th September 1879, and dated the 13th March 1879.
"
'
PROVISIONAL SPECIFICATION left by the said Henry William Heale at
the Office of the Commissioners of Patents on the 13th March 1879.
HENRY WILLIAM HEALE, of Brixton Rise, in the County of Surrey. CERTAIN.
IMPROVEMENTS IN THE CONSTRUCTION OF VENTILATORS AND CHIMNEY TOPS."
The Invention is designed for the purpose of creating in chimneys, flues, and
other confined spaces or compartments a constant upward current or draught, which
will prevent foul air or smoke lodging within the space forming the interior of the
chimney, or the air from becoming vitiated in rooms or other confined places. I
will as an example of the application of the Invention proceed to describe it as
applied for the purpose of curing smoky chimneys, according to which I fix at the.
top of the chimney a cylinder or tube composed of earthen-ware-zine or other
suitable material, the upper portion of which is enlarged so as to assume a spheric
formation cut away at the top; so as to leave an outlet about equal in size or,
diameter to that of the lower tube or cylinder. This outlet is surmounted with an
inverted conical ring, the larger diameter of which forms an annular space imme-
diately around the upper edge or butlet of the spheric enlargement of the lower
tube or cylinder. The conical ring may be provided with a swivel stud, which
supports a fixed or revolving cap situated just above the opening through which the
smoke escapes from the conical ring before mentioned.
The action or force of the wind when bearing from any point against the spheric
sides of the tube, and the inclined surfaces of the conical ring will be thrown off in
a direction which produces a partial vacuum in the interior of the chimney; thus
effecting a constant upward current therefrom, which prevents foul air or smoke
lodging therein.
Rooms, compartments, or other confined places, may readily and effectually be
ventilated by the application thereto of a cylinder or tube, the upper termination of
which is formed in manner similar to that of the chimney top herein described,
always providing that when used for ventilating purposes a diaphram or cap
should be placed in or above the conical ring so as to prevent the entrance of
weather.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry William Heale in the Great Seal Patent Office. on the
13th September 1879. .
"
HENRY WILLIAM HEALE, of Brixton Rise, in the County of Surrey. CERTAIN
IMPROVEMENTS IN THE CONSTRUCTION OF VENTILATORS AND CHIMNEY TOPs."
The Invention is designed for the purpose of creating in chimneys, flues, and
other confined spaces or compartments, a constant upward current or draught
which will prevent foul air or smoke lodging within the space forming the interior
of the chimney, or the air from becoming vitiated in rooms, vehicles, cabins, recep-
tacles, or other confined places.
I will as an example of the application of the Invention proceed to describe it as
applied for the purpose of curing smoky chimneys, according to which I fix at the
top of the chimneys a cylinder or tube composed of earthenware zinc, or other
suitable material, the upper portion of which is enlarged so as to assume a spheric
or other formation cut away at the top, so as to leave an outlet about equal in size
or diameter to that of the lower tube or cylinder. This outlet is surmounted with
an inverted conical louvre ring, the larger diameter of which forms an annular space
immediately around the upper edge or outlet of the enlargement of the lower tube
or cylinder. The conical louvre ring may be provided with a swivel stud which
supports a fixed or revolving cap situated just above the opening through which the
smoke escapes from the louvre ring before mentioned.
The action or force of the wind when bearing from any point against the spheric
or concave sides of the tube and the inclined surfaces of the louvre ring will be
thrown off in a direction which produces a partial vacuum in the interior of the
cylinder or chimney, thus effecting a constant upward current therefrom, which
prevents foul air or smoke lodging therein. Rooms, compartments, or other confined
places, whether stationary or locomotive, may readily and effectually be ventilated
by the application thereto of a cylinder or tube, the upper termination of which is
formed in manner similar to that of the chimney top herein described, always
providing that when used for ventilating purposes a diaphram or cap should, by.
preference, be placed in or above the conical louvre ring, so as to prevent the
entrance of a down draught or weather.
In order that the Invention may be well understood and explained in detail, I.
have hereunto annexed a Sheet of Drawings made about quarter size, similar letters
of reference being marked on corresponding parts on all the Figures alike.
Fig. 1 represents in sectional elevation the novel construction and arrangement of
my improved ventilator as applied to chimneys for causing an induced current
therein.
Fig. 2 shews a similar view of a chimney top, the construction of which offers
great facilities greater for manufacture, and
Fig. 3 represents the improved arrangement of ventilator as applied to rooms or
other confined places; in this view will be seen the application of a diaphram or cap
placed a little above or over the top of the louvre ring.
'In these Figs. a, a, is a cylinder or tube which may be composed of earthenware,
zinc, or other suitable material, the upper portion of which at b is enlarged so as to
assume an upper concave formation, terminating in an orifice about equal in size or :
diameter to that of the cylinder a.
This outlet is surmounted with an inverted louvre ring c, the larger diameter of
which forms an annular space d immediately around the upper edge or outlet of the
enlargement in the lower tube a.

page_text: This louvre ring may in some cases be provided with a cap e as shown at in
Fig. 3.
The action or force of the wind when bearing from any point against the concave
sides of the enlarged portion of the cylinder a, and against the inclined sides of the
louvre ring c, will be thrown off in a direction which produces a partial vacuum in
the interior of the cylinder a, and will thus effect a constant upward current of air
to pass from the orifices of the cylinder a and louvre ring c, which will not only
cure smoky chimneys placed thereon, but will cause an induced current to ascend
up the shaft of the cylinder a when properly applied, which will effectually ventilate
receptacles, spaces, and capacities, whether they be vehicles travelling by land or
water, or rooms, sewers, or other confined spaces on land, or confined spaces, such as
those formed by coverings for the human head.
Having now described the nature of my said Invention, together with the manner
of performing the same, I wish it to be particularly understood in conclusion that
I do not confine myself to the exact configuration or enlargement of the space
forming the termination of the cylinder, as such enlargement is old and well known,
but what I do claim as new and as of my Invention is,-
The novel construction, formation, and arrangement of a chimney top or ventilator,
having an enlarged top, the upper surface of which is concave, and made circular or
polygonal, surmounted with a louvre ring or band to be employed in the manner
and for the purpose as herein substantially described, set forth, and illustrated in
the Drawing annexed.
In witness whereof, I, the said Henry William Heale, have hereunto set
my hand and seal, this Thirteenth day of September 1879.
Witness,
EDWARD TANN,
Stationer,
75, Chancery Lane.
HENRY WILLIAM HEALE. (L.S.)