IMPROVEMENTS IN APPARATUS FOR CURING SMOKY CHIMNEYS, AND PREVENTING DOWN DRAUGHT."
Year: 1859

page_text: LETTERS PATENT to Charles Hagan, Clerk of Works, Tower of London,
for the Invention of "IMPROVEMENTS IN APPARATUS FOR CURING SMOKY
CHIMNEYS, AND PREVENTING DOWN DRAUGHT."
PROVISIONAL SPECIFICATION left by the said Charles Hagan at the
Office of the Commissioners of Patents, with his Petition, on the
6th July 1859.
I, CHARLES HAGAN, Clerk of Works, Tower of London, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN APPARATUS FOR CURING
SMOKY CHIMNEYS, AND PREVENTING DOWN DRAUGHT," to be as follows:-
It is made of iron, copper, zinc, or other material, and consists of an inner
tube, open at top, and an outer case or head of peculiar shape, open also at
top, and connected by stays to the inner tube, both forming one chimney cap,
or wind guard. It may be made either circular, octagonal, or rectangular on
plan, the area of which may be larger or smaller in proportion to the fire-
place. The peculiarity of its action is, that while it permits all smoke to
pass freely away, and causes an upward current, it prevents. any smoke
returning into the flue.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Hagan in the Great Seal Patent Office on the
6th January 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
HAGAN, Clerk of Works, Tower of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of July, in the year of our 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 Charles Hagan, Her special licence that I, the said Charles
Hagan, my executors, administrators, and assigns, or such others as I, the
said Charles Hagan, 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
APPARATUS FOR CUBING SMOKY CHIMNEYS, AND PREVENTING DOWN DRAUGHT," чpon
the condition (amongst others) that I, the said Charles Hagan, by an instru-
ment in writing under my hand and seal, 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.
NOW KNOW YE, that I, the said Charles Hagan, do hereby declare
the nature of the 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):-
-
It is made of iron, copper, zinc, or other material, and consists of an inner
tube A open at top, an outer case or head B, open also at top, and stays or
partitions c, c, c, c, which connect A and B together, and form one apparatus,
(see Drawings annexed to this Specification, the same letters indicate the
same parts in each Figure).
It will be evident, by reference to Figures 2 and 3, that the relative
position of the top of the outer case, or head B, with regard to the top of the
inner tube A is such, and the area for the egress of wind being more than
three times the area for its ingress, that the smoke can be passing freely
away while the wind is blowing downwards; and in the event of a whirlwind
blowing into the outer case, or head B, the stays or partitions c, c, c, c, which

page_text: are the whole height of the head, will break up its circular motion, and cause
it to pass down in one or more of the spaces between the mouth of the inner
tube A and the outer case or head B (see Figure 3.) The upper current
is caused and maintained by the protection which the outer case, or head and
the stays, or partitions give to the mouth of the inner tube, together with the
upward draught caused by the lower edge of the outer case or head, and the
slanting portion of the upper part of the inner tube (see Figure 2.)
The apparatus may be made either octagonal (the form I have shown on
the annexed Drawings,) circular, rectangular, a polygon of any number of
sides, or a combination of any of these forms on plan, the area of which may
be larger or smaller in proportion to the fire-place. The bottom portion of
the inner tube may be made to suit the form of any flue (on the annexed
Drawings I have shown it suitable for an ordinary flue, fourteen inches by
nine inches.) Finally, it will be observed, by reference to to the vertical
section, Figure 2, that the apparatus can be swept through by the ordinary
chimney-sweepers' machine.
In witness whereof, I, the said Charles Hagan, have hereunto set my
hand and seal, this Sixth day of January, in the year of our Lord,
One thousand eight hundred and sixty.
CHARLES HAGAN. (L.S.)