CERTAIN IMPROVEMENTS IN STEAM BOILERS
Year: 1869

page_text: LETTERS PATENT to Atwood Wigzell, of Sowerby, near Halifax, in
the County of York, Engineer, for the Invention of "CERTAIN
IMPROVEMENTS IN STEAM BOILERS."
Sealed the 18th February 1870, and dated the 20th August 1869.
PROVISIONAL SPECIFICATION left by the said Atwood Wigzell at the
Office of the Commissioners of Patents, with his Petition, on the
20th August 1869.
I, ATWOOD WIGZELL, of Sowerby, near Halifax, in the County of
York, Engineer, do hereby declare the nature of the said Invention for
"CERTAIN IMPROVEMENTS IN STEAM BOILERS," to be as follows:-
This Invention relates to the construction and general arrangement
of boilers, and the improvements consist in fixing a series of conical
tubes to one or both sides externally of a parallel tube of any desirable
length. Two or more of such are placed side by side and arranged so that
the conical tubes of one fit betwixt the conical tubes of the other,
forming a horizontal tier of these combined tubes. I then place two or
more tiers of such tubes one above another and connect them at each
end by short pipes, the spaces betwixt forming flues, and at any suitable

page_text: distances above the top tier I place a parallel tube which is also
connected to the other tubes to form a steam chamber. I form a fire-
place at one or both ends under these tubes. By this construction and
arrangement of boiler I obtain a great amount of heating or steam
generating surface and a more perfect circulation of the water than
heretofore.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Atwood Wigzell in the Great Seal Patent Office
on the 19th February 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ATWOOD
WIGZELL, of Sowerby, near Halifax, in the County of York, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of August, in the year of
our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Atwood Wigzell, Her special licence
that I, the said Atwood Wigzell, my executors, administrators, and
assigns, or such others as I, the said Atwood Wigzell, 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 "CERTAIN IMPROVE-
MENTS IN STEAM BOILERS," upon the condition (amongst others) that I,
the said Atwood Wigzell, 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 Atwood Wigzell, 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

page_text: by the following statement and accompanying Sheet of Drawings (that
is to say):-
This Invention relates to the construction and general arrangement
of boilers, and the improvements consist in fixing a series of conical
tubes to one or both sides externally of a parallel tube of any desirable
length; two or more of such are placed side by side and arranged so
that the conical tubes of one fit betwixt the conical tubes of the other,
forming a horizontal tier of these combined tubes. I then place two or
more tiers of such tubes one above another, which I connect at each
end by short pipes, the spaces betwixt forming flues, and at any suitable
distances above the top tier I place a parallel tube, which is also
connected to the other tubes to form a steam chamber; I form a fire-
place at one or both ends under these tubes. By this construction and
arrangement of boiler I obtain a great amount of heating or steam
generating surface and a more perfect circulation of the water than
heretofore.
In order that the Invention may be clearly understood, I herewith
give reference to an accompanying Sheet of Drawings illustrating the
same.
Fig. 1 is the front elevation; Fig. 2 is the side elevation; and Fig. 3
is the plan of a boiler constructed and arranged according to the said
Invention. In cach Figure portions of the brickwork being removed
to shew the boiler better.
A, B, and C, and A¹, B', and C', are the parallel tubes with conical
tubes a, b, c, and a', b', c', fixed to and projecting out from them
horizontally, those conical tubes which are connected to A passing in
between those conical tubes connected to A', forming a horizontal tier of
the said tubes. In like manner the tubes B and B with their conical
tubes 6 and 6' also form another tier above the former, and the same
with regard to the tubes C and C₁, and their conical tubes c and c', the
whole being connected by short pipes D. Above these is a tube or
steam chamber E connected to C and C¹ by pipes G and H. To this
chamber may be attached at any convenient place a pipe to conduct
the steam to used or any purpose for which it may be required.
Fig. 4 shews an enlarged section of one of the tubes A taken through
one of the conical tubes a, which form or construction is common to the
others.

page_text: Having thus described the nature of my said Invention, and shewn
by Drawings how the same is or may be performed or carried. into
practical operation, I would have it understood that I do not confine
myself to any particular size and form or number of tubes to be employed,
or to the precise arrangement of the tiers or mode of construction of the
tubes as herein shewn; but what I claim as of my Invention and
believe to be new is, the application of or fixing to ordinary parallel
or cylindrical tubes a series of conical tubes, and the combination and
arrangement of such in tiers to form or constitute steam boilers or
apparatus for generating steam, in manner substantially as herein
described and shewn by the Drawings.
In witness whereof, I, the said Atwood Wigzell, have hereunto
set my hand and seal, this Eighteenth day of February, in the
year of our Lord One thousand eight hundred and seventy.
Signed, sealed, and delivered by the
within-named Atwood Wigzell, in
the presence of
WM. TASKER,
Patent Agent,
Halifax & Bradford.
ATWOOD WIGZELL. (L.S.)