IMPROVEMENTS IN CHIMNEY TOPS
Year: 1860

page_text: LETTERS PATENT to Robert Atkinson, of the Firm of Robert Atkinson
& Co., of Southampton Court, Tottenham Court Road, in the County of
Middlesex, for the Invention of "IMPROVEMENTS IN CHIMNEY TOPS."
Sealed the 11th October 1860, and dated the 11th April 1860.
PROVISIONAL SPECIFICATION left by the said Robert Atkinson at the
Office of the Commissioners of Patents, with his Petition, on the 11th
April 1860.
I, ROBERT ATKINSON, of the Firm of Robert Atkinson & Co., of Southamp-
ton Court, Tottenham Court Road, in the County of Middlesex, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN CHIMNEY
Tops," to be a follows:-
These improvements consist in the formation of chimney tops, so that an
upward current of air may be insured, thereby preventing the wind from de-
scending in the chimney, and cause it to smoke in the room or apartment in con-
nection therewith; the main object being to so arrange a series of wind guards
and wind accumulators, that the upward current inside may be greatly in excess.
For this purpose, on the outside of the pipe or tube forming the chimney top,
is fixed a series of vertical ribs with tapering cross pieces attached to the
edge thereof, forming a series of T-shaped ribs round the said pipe or tube.
When the wind strikes the chimney top, it enters between these T-shaped ribs,

page_text: and its egress being prevented by the overhanging edges of the said ribs, it is
forced to travel upwards, through openings provided, into the interior of the
chimney top, and thus causes an upward current. A series of chambers are also
provided round the exterior of the chimney tube or pipe, and communicating
with the interior, for the purpose of increasing the upward current of air. And
also short interior tubes or flat rings, for directing and dividing the currents.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Atkinson in the Great Seal Patent Office on the
11th October 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
ATKINSON, of the Firm of Robert Atkinson and Company, of Southampton
Court, Tottenham Court Road, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of April, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-third year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Robert Atkinson, Her special licence that I, the said Robert Atkinson,
my executors, administrators, and assigns, or such others as I, the said
Robert Atkinson, 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
CHIMNEY TOPS," upon the condition (amongst others) that I, the said Robert
Atkinson, 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 calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Robert Atkinson, 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 follow-
ing statement:-
These improvements consist in the formation of chimney tops, so that an
upward current of air may be insured, thereby preventing the wind from de-

page_text: scending in the chimney, and cause it to smoke in the room or apartment in
connection therewith; the main object being to so arrange a series of wind
guards and wind accumulators, that the upward current inside may be greatly
in excess, and thus prevent any downward current. For this purpose, on the
outside of the pipe or tube forming the chimney top, is fixed a series of
vertical ribs with tapering cross pieces attached to the edge thereof, forming a
series of T-shaped ribs round the said pipe or tube. When the wind strikes
the chimney top it enters and between these T-shaped ribbs, and its egress
being prevented by the overhanging edges of the said ribs, it is forced to travel
upwards through openings provided into the interior of the chimney top, and
thus causes an upward current. A series of chambers are also provided round
the exterior of the chimney tube or pipe and communicating with the interior,
for the purpose of increasing the upward current of air; and also short interior
tubes or flat rings for directing and dividing the currents.
And that the Invention may be more fully understood, I will proceed to
describe the Sheet of Drawings hereunto annexed and forming part of this
Specification, in which Fig. 1 is a front elevation; Fig. 2, a plan; Fig. 3, a
sectional elevation; and Fig. 4, a sectional plan through X, Y, of a chimney
top constructed according to my Invention. In each of the above mentioned
Figures the same letters of reference indicate like parts.
A, A, A, are the spaces between the vertical ribs or T pieces fixed round
the chimney top, into which the wind enters on striking the chimney and its
egress is prevented by the T pieces B, B, the overbanging edges C, C, con-
fining the wind, and forcing it to travel upwards as shewn by the arrows, into
the interior of the chimney P. The chimney may be made octagonal, round,
or any other suitable shape or form, but I prefer an octagonal shape as shewn
in the Drawings.
The conical shaped piece D immediately above the T pieces, serves as a
guide for the wind accumulated by the T pieces underneath, and the upper
surface of the said conical piece is divided by vertical partitions N, N, which
serves also as supports to the upper part of the chimney top, and form a series
of chambers or wind accumulators L, L, L; there are four chambers or
accumulators in the Drawing, but I do not confine myself to that or any
number. These wind accumulators L, L, have communications with the
chimney, and the wind passing through them assists to make an upward
current therein. The two rings or short tubes E & F serve to direct and
d.vide any downward currents which are thus separated and divided as to
offer little if any resistance to the upward currents of air.
This Invention can also be used for ventilating workshops, manufactories,

page_text: public or other buildings, or edifices, as the upward current in the chimney or
ventilator would draw up and remove all foul or vitiated air that accumulated
at the roof or ceiling, and keep up a circulation of air in the building, room, or
apartment.
I do not bind myself to the precise details herein described, as the same
may be modified without departing from my Invention, but what I claim and
desire to have secured to me by my Letters Patent is, a chimney top or venti-
lator constructed substantially in the manner as herein-before described, that
is to say, with vertical T pieces and wind accumulators, constructed and fixed
in the manner and for the purposes as herein-before delineated and described,
or any mere modification of the same.
In witness whereof, I, the said Robert Atkinson have hereunto set my
hand and seal, this Tenth day of October in the year of our Lord One
thousand eight hundred and sixty.
(L.S.) ROBERT ATKINSON.
Witness,
JOSEPH WILLCOCK,
Patent Agent & Consulting Engineer,
89, Chancery Lane, London.