AN IMPROVED ARRANGEMENT OF APPARATUS · FOR CURING SMOKY CHIMKIES, AND FOR VENTILATING PURPOSES
Year: 1860

page_text: LETTERS PATENT to William Selby Wood, of Chislehurst, in the County
of Kent, for the Invention of "AN IMPROVED ARRANGEMENT OF APPARATUS
· FOR CURING SMOKY CHIMKIES, AND FOR VENTILATING PURPOSES."
Sealed 22nd May 1861, and dated the 27th November 1860.
PROVISIONAL SPECIFICATION left by the said William Selby Wood at
the Office of the Commissioners of Patents, with his Petition, on the
27th November 1860.
I, WILLIAM SELBY WOOD, of Chislehurst, in the County of Kent, do hereby
declare the nature of the said Invention for "AN IMPROVED ARRANGEMENT OF
APPARATUS FOR CURING SMOKY CHIMNIES, AND FOR VENTILATING PURPOSES," to be
as follows:-
My Invention consists in arranging one chimney pot within another of
greater diameter, and from whose base an up-draught is obtained, the exterior
forming a cover to the interior pot.
The interior pot I construct with slots or perforations in a perpendicular or
other position, so that the smoke is allowed to escape gradually into the outer
pot, and from thence to the air; the outer pot cau at all times be cleansed
from soot through these perforations in the interior pot.
When desirable, I fix to the top of the interior pot a hood or cover made of
suitable metal or material, also an indicator to indicate the four cardinal
points.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Selby Wood in the Great Seal Patent Office on the
25th May 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
SELBY WOOD, of Chislehurst, in the County of Kent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of November, in the year of our
Lord One thousand eight hundred and sixty, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Selby Wood, Her special licence that I, the said William
Selby Wood, my executors, administrators, and assigns, or such others as I, the
said William Selby Wood, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times.
thereafter during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain and 1
Ireland, the Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
ARRANGEMENT OF APPARATUS FOR CURING SMOKY CHIMNIES, AND FOR VENTILATING
PURPOSES,"
upon the condition (amongst others) that I, the said William
Selby Wood, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calender months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Selby Wood, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following:
statement, that is to say: -
This Invention relates to an improved arrangement of chimney top, and
consists of placing one chimney pot within another of greater diameter, from 3
the base of which a draught is obtained. The interior pot is constructed with
slots or perforations in a vertical or other position, for the purpose of enabling
the outer pot to be cleansed when required. When necessary a hood or cover
is placed on the top to adapt it to ventilating purposes, in which case the
vitiated air passes gradually away through the slots or perforations in the
interior pot or tube; and to the top of the chimney an indicator is placed, if
desired, to indicate the four cardinal points.
The aforesaid improved chimney top, either in part or in whole, may be

page_text: made of iron, copper, zine, terra cotta, or other suitable metal or material, and
may be formed circular, rectangular, polygonal, or any desired shape:
The said improvements will be clearly understood by referring to the
Figures and letters of reference on the accompanying Sheet of Drawings, in
which Fig. 1 is a sectional elevation of one of my improved chimney tops
complete; Figs. 2 and 3, transverse sections of parts of the same; Figs. 4, 5;
and 6 are hoods or caps of various shapes and sizes; Fig. 7, a vertical screw
or spindle, cross bar, and rods; Fig. 8, an indicator; and Fig. 9, a perspective
view of the top entire.
. In Fig. 1, a represents the tube or interior pot through which the smoke
passes from the chimney; it is slotted at the top for the purpose of enabling
the chimney sweeper's machine to cleanse it thoroughly of corroded soot. For
ventilating purposes, and when the tube is closed at the top, they allow the
vitiated air to pass gradually away; b is the exterior pot or tube, of greater
length and diameter at the base than the interior pot, but nearly or quite
corresponding with it in the diameter at the top. This exterior pot or tube b
is placed over and around the interior pot or tube a, forming to
an entire
case or cover, which is supported by partitions extending to the top or a little
beyond the inner tube, leaving a space between the two tubes, which space is
equally divided into two or more compartments by the aforesaid partitions ;
by this arrangement the inner tube, through which the smoke passes from the
chimney, is always kept warm, at least equal to the temperature of the smoke
and heated air of the chimney; and the wind, blowing in any direction, splits.
on the top, and by the assistance of the partitions which extend below tho.
base of the tube b, is distributed equally and guided upwards in the direction
of the arrows. Upon mixing with the smoke the compound undergoes com-
pression, increases in momentum to the top, where, being taken up by a similar
current, it is expelled with great velocity; c is a case, cap, or covering to the
upper portion of the tube b; and is supported by partitions commencing below
it and extending to the top, or nearly so, leaving a space between, as shewn
by the arrows. The partitions serve not only to support the cap, but to catch
the wind and direct it upwards in a line with the arrows; thus, by these
arrangements a second and similar current to that at the base is also obtained
at the top. I do not depend entirely upon the wind for an upward current,.
because the inner tube being kept warm, together with the top part of the..
exterior tube, an upward current is obtained even in the most sluggish ätmo-:
sphere; d is a vertical screw or spindle, with a hood, supported on a cross bar
ee, of any suitable shape, and which is suspended directly over the mouth of
the tube b. In lieu of the cross bar the screw or spindle is sometimes sup-

page_text: ported in a socket at the side of the top. The screw and bar are attached to
rods, which are made to work easily through tubes or eyes f, or through the
partitions which support the case or cap c; by this arrangement the chimney
sweeper's machine is enabled to raise the hood, pass entirely through the top,
and cleanse it with the same ease as any other part of the chimney, which has
not been hitherto accomplished. The hood is useful, not only in preventing
the wind from blowing down the mouth of the chimney, but to regurgitate it,
and thus to cause an upward current. The vertical screw or spindle enables
me to use any number of hoods, and of any suitable shape, for the require
ments of the case, also to raise and lower them as circumstances may require,
and if necessary to dispense with them altogether, the whole being arranged
in such a way that sufficient area is always allowed for the free egress of
smoke.
Fig. 2 is a transverse section of the top, shewing the space for the free
egress of smoke and air; Fig. 3, a transverse section of the base, shewing a'
space for the admission of external air; Figs. 4, 5, and 6, different kinds of
hoods or caps, having a nut in the centre for the purpose of being raised or
lowered on the vertical screw, Fig. 7, which is attached to a cross bar or
spindle having rods; Fig. 8 is an indicator representing the cardinal points; it
has a nut in the centre, and can be used or not on the vertical screw; the use
of this is to readily distinguish the tops of chimneys in event of fire or
repairs, or to impart to the chimney sweeper the oft required information in
those cases of crooked chimnies which can be swept only from their tops, a
discovery which is at present made a nuisance by the chimney sweeper going
from room to room and calling through the chimney to his companion at the
top, who, if he has not a very quick ear, will sometimes thrust. his machine
down a chimney in mistake. In lieu of using the cardinal points I number
or label the outer case.
Having now described in detail the various parts of my Invention, and the
way in which it is generally to be applied, I wish it to be further understood
that there are various modifications of the same; first, the inner tube may be
used alone, having apertures at the base, with its partitions extending to the
top and supporting the cap, vertical screw or spindle, cross bar with rods and
eyes, as described, and which may be made to represent the outer case; second,
the outer case may contain the partitions as described, and be made to fit over
an ordinary red pot; third, an iron or other tube may be made with two or
more partitions, and be inserted in the chimney, leaving openings in the. brick-
work at any suitable point. Of all these methods I prefer the former, although
I do not confine myself to any particular method of its application. I would

page_text: also observe, that I am aware that two or more tubes, one within the other,
have been used in order to create a draught, there is, therefore, no novelty in
this. But. what I claim is,-
First, the use of two tubes, arranged substantially as described, one within
another, and leaving partitions either on the exterior of the inner or interior
of the outer tube, extending, when properly arranged, below the base of the
outer tube and above the top of the inner tube, used for the several purposes
herein set forth.
Second, the vertical screw or spindle d, and cross bar, with rods working
through tubes or eyes, by which I am enabled to use, as the case may require,
one or more hoods of various sizes and shapes, and to raise and lower them
for the purposes described.
Third, the indicator when applied to the tops of chimnies for the purposes
herein set forth.
Fourth, the application of the various parts of my Invention, either sepa-
rately or in conjunction, after the manner herein described.
In witness whereof, I, the said William Selby Wood, have hereunto set
my hand and seal, this 20th day of May, in the year of our Lord One
thousand eight hundred and sixty-one.
Witness,
EDWARD T. HUGHES,
Patent Agent,
128, Chancery Lane,
WILLIAM SELBY WOOD. (L.S.)
London.