IMPROVEMENTS IN WIND GUARDS FOR CHIMNIES
Year: 1859

page_text: LETTERS PATENT to Joseph Mabbott, of No. 7, Sunbury Terrace,
Liverpool Road, in the County of Middlesex, for the Invention of
"IMPROVEMENTS IN WIND GUARDS FOR CHIMNIES."
Sealed the 5th June 1860, and dated the 7th December 1859.
PROVISIONAL SPECIFICATION left by the said Joseph Mabbott at the
Office of the Commissioners of Patents, with his Petition, on the 7th
December 1859.
I, JOSEPH MABBOTT, of No. 7, Sunbury Terrace, Liverpool Road, in the
County of Middlesex, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN WIND GUARDS FOR CHIMNIES," to be as follows:-
The objects of this Invention are, firstly, to prevent any downward draught,
which is one of the principal causes of what is known as "smoky chimnies;"
secondly, to render the guard self-cleansing, and are effected as follows:-
Upon the top of the ordinary chimney pots, or affixed to the brickwork in lieu
thereof, is placed a metallic cylinder, above which are ranged two or more
"cupola "-shaped caps, larger at their bases than the diameter of the cylinder,
and diminishing in size one above another. The results of this arrangement
are that the wind travels round the interior of the "cupolas" without descend

page_text: ing the chimney, and at the same time cleansing their interiors, whereby the
operation of sweeping (as is the case with other wind guards) is entirely
dispensed with.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Mabbott in the Great Seal Patent Office on the
7th June 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
MABBOTT, of No. 7, Sunbury Terrace, Liverpool Road, in the County of
Middlesex, send greeting.
of our
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of December, in the
year
Lord One thousand eight hundred and fifty-nine, in the twenty-third year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Joseph Mabbott, Her special licence that I, the said Joseph
Mabbott, my executors, administrators, and assigns, or such other as I, the
said Joseph Mabbott, 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 Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
WIND GUARDS FOR CHIMNIES," upon the condition (amongst others) that
I, the said Joseph Mabbott, my executors or administrators, by an instru-
ment 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 calendar months next
and immediately after the date of the said Letters Patent.
per-
NOW KNOW YE, that I, the said Joseph Mabbott, do hereby declare the
nature of my said Invention, and in what manner the same is to be
formed, to be particularly described and ascertained in and by the following
statement, that is to say:-
The objects of this Invention are, firstly, to prevent any downward draught,
which is one of the principal causes of what is known as "smoky chimnies;"
secondly, to render the guard self-cleaning.

page_text: In order to explain my said Invention as completely as possible, I now
proceed to describe the best means I am acquainted with for carrying the same
into practical effect, reference being had to the illustrative Sheet of Drawings
hereto annexed, and to the numeral figures and letters of reference marked
thereon respectively, as follows:-
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is an elevation of any Invention as it would appear when in use;
Fig. 2 is a vertical section of Fig. 1; and Fig. 3 another elevation of my
said Invention. Similar letters of reference denote corresponding parts where
such parts appear at each of the Figures respectively.
Upon the top of the ordinary chimney pots, or affixed to the brickwork in
lieu thereof, is placed a metallic cylinder a, above which are ranged two or
more "cupola " or funnel shaped caps b, b, open at their tops to allow of the
free passage of the smoke; these caps are securely attached to the metallic
cylinder a by any suitable means; thus it will be seen at Fig. 1, that as the
smoke leaves the cylinder a the draught rushes up through the caps b, b, in
the direction of the arrow's flight, and is carried out immediately under the
vane; but should there be any sudden downward draught it will pass out of
the lower part of the caps b, as indicated by the arrows at Fig. 2, before it
has time to enter the cylinder a, the smoke being assisted in its upward
course by the pocket c, c, on the sides of the cylinder a. To render the
caps b, b, self-cleansing, I place scrapers d, d, (Fig. 2) within the caps b, b,
and affix them to a vertical rod e, e, the bottom end of which works in a glass
step as shewn, the upper part also working through a glass collar, thereby
lessening the noise when the vane is revolving, and consequently the friction.
Having now described the nature and object of my said Invention of
Improvements in Wind Guards for Chimnies," together with the manner
in which the same is to be peformed, I would remark in conclusion, that I do
not confine or restrict myself to the precise details herein described and shewn
in the accompanying Drawings, as many slight modifications may be made
therein without in any way departing from the principle of my Invention; for
instance the caps b, b, may be made of various shapes in elevation (but always
circular), when the scrapers d, d, would require to be shaped so as nearly to
fit the interior of the caps; but what I claim as my Invention intended to be
secured to me by the herein in part recited Letters Patent is the manufacture
of wind guards for chimnies in the manner herein described and shewn by

page_text: the accompanying illustrative Sheet of Drawings for the purposes herein
set forth.
In witness whereof, I, the said Joseph Mabbott, have hereunto set my
hand and seal, this Sixth day of June, in the year of our Lord
One thousand eight hundred and sixty.
Witness,
L. J. WETHERELL,
Clerk to Messrs. Prince & Co.
Patent Agents,
4, Trafalgar Square,
Charing Cross.
J. MABBOTT. (L.S.)