CERTAIN IMPROVEMENTS IN CHIMNEYS, BY THE APPLICATION OF A MECHANICAL APPARATUS AS A SMOKE CONDUCTOR
Year: 1831

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
HENRY POLLARD, of Park Street, Grosvenor Square, in the County of Middle-
sex, Estate and House Agent, send greeting.
. WHEREAS His present Majesty King William the Fourth, in and by His
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Nineteenth day of October last, for Himself, His heirs and
successors, did give and grant unto me, the said Thomas Henry Pollard, my
executors, administrators and assigns, His special licence, full power, sole
privilege and authority, that I, the said Thomas Henry Pollard, my executors,
administrators, and assigns, and every of them, by myself, and themselves, or
by my and their deputy or deputies, servants or agents, or such others as I,
the said Thomas Henry Pollard, my executors, administrators, or assigns, should
at any time agree with, and no others, from time to time and at all times
thereafter during the term of years, therein expressed, should and lawfully
might make, use, exercise, and vend, within England, Wales, and the Town
of Berwick-upon-Tweed, my Invention of "CERTAIN IMPROVEMENTS IN CHIMNEYS,
BY THE APPLICATION OF A MECHANICAL APPARATUS AS A SMOKE CONDUCTOR;" in which
said Letters Patent there is contained a proviso, obliging nie, the said Thomas
Henry Pollard, by an instrument under my hand and seal, particularly to
describe and ascertain the nature of my said Invention, and in what manner
the same is to be performed, and to cause the same to be inrolled in His
Majesty's High Court of Chancery within two calendar months next and
immediately after the date of the said recited Letters Patent, as in and by the
same (relation being thereunto had) may more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso I, the said
Thomas Henry Pollard, do hereby describe and ascertain the nature of my
said Invention, and in what manner the same is to be performed, by the two
Plans or Drawings in the margin of these Presents and the following_description
thereof, that is to say :-
The smoke conductor is placed on the top of any chimney, and consists of
the application of a fly-wheel (a), either of two or more fans (the Patentee has
adopted six), which fans are placed at an angle with the axle of from twenty to
forty-five degrees, more or less, and attached to the top of the cowl. Upon
this fly-wheel the wind acts so as to keep the mouth or opening of the cowl
turned from the current of the wind, thereby preventing it from obstructing
the ascension and emission of the smoke. This fly-wheel (a) is fixed upon an
axle, on which axle is fixed the wheel (b) working into the wheel (c), which is
fixed on an upright spindle running in the hollow tube (d); this tube rests on
a step (e) at the lower part of the cowl, and also supports one end of the axle
of the fly-wheel (a), the other end of which axle is supported by a corresponding
pillar () on the lower end of the upright spindle, as fixed, the wheel (f)
working into and revolving round the base wheel (9), which is fixed to the
stock of the cowl. The base wheel (g), round which the whole of the upper
part or head revolves by the action of the wind on the fly-wheel (a), must have
two or more ars to support the upright spindle (h). In Figure 2 it is repre-
sented with four arms), which arms pass across the interior of the stock of the
cowl, and at their intersection is fixed the upright spindle (h), which supports
the head, and on which the head revolves on a centre k; the head is also kept
in its perpendicular position by a cross-piece (i) running round the spindle (h).
At one end of the cross-piece is attached, by means of screws, the step (e),
which also supports the spindle running in the hollow tube d. The wheels f, b,
and c should be in relative proportion to the base wheel g, so that the fly-
wheel (a) may have from ten to twenty revolutions, more or less,, whilst the
cowl makes one revolution round the base wheel g. The whole may be
made of iron, brass, or copper, or partly with any of those metals along with
zinc, or tin, or any other metal suitable for the purpose. In Figure 2 that
part of the mouth of the cowl immediately above the stock is not represented,
in order to shew the cross-piece (i) and the upright spindle (h).
In witness whereof, I, the said Thomas Henry Pollard, have hereunto set
my hand and seal, the Fifteenth day of November, in the year of our
Lord One thousand eight hundred and thirty-one.
THOS HENRY POLLARD. (L.B.)

page_text: AND BE IT REMEMBERED, that on the same Fifteenth day of November,
in the year above mentioned, the aforesaid Thomas Henry Pollard came before
our Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained, in form above written. And
also the Specification aforesaid was stamped according to the tenor of the
Statute in that case made and provided.
Inrolled the Seventeenth day of December, in the year above written.