IMPROVEMENTS IN STEAM BOILERS
Year: 1858

page_text: LETTERS PATENT to George Adshead, of Staley New Mills, Staleybridge,
in the County of Chester, Spinner, for the Invention of "IMPROVEMENTS
IN STEAM BOILERS."
Sealed the 30th November 1858, and dated the 15th June 1858.
PROVISIONAL SPECIFICATION left by the said George Adshead at the
Office of the Commissioners of Patents, with his Petition, on the
15th June 1858..
I, GEORGE ADSHEAD, of Staley New Mills, Staleybridge, in the County of
Chester, Spinner, do hereby declare the nature of the said Invention for
IMPROVEMENTS IN STEAM BOILER'S," to be as follows:-
My Invention refers to such boilers as are furnished with a tube or tubes
constituting flues, and also to boilers of other constructions, and consists in
forming the bridges thereof of metal chambers supplied with water, and such
chambers I construct, when practicable, (as in the first-mentioned description*
of boiler,) so that the bottoms thereof are open.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Adshead in the Great Seal Patent Office on the
15th December 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
ADSHEAD, of Staleybridge, in the County of Chester, Cotton Spinner, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifteenth day of June, in the year of our Lord One
thousand eight hundred and fifty-eight, in the twenty-first year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
George Adshead, Her especial license that I, the said George Adshead, my
executors, administrators, and assigns, or such others as I, the said George
Adshead, 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 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 "IMPROVE-
MENTS IN STEAM BOILERS," upon the condition, amongst others, that I, the
'said George Adshead, by an instrument 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 George Adshead, 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 and accompanying Drawing, "that. is. to say ":
In the accompanying Drawings Fig. 1 represents my Invention in longi-
tudinal section, and applied to a boiler upon the tubular flue principle; and
Fig. 2 is a transverse section thereof. The fire. bars are. shewn at a, behind
which is the bridge 6, which is constituted by a water chamber. This chamber
is open at its lower end from c to d, by which means a man-hole is formed, and
the accumulation of sediment prevented. To the upper part of the chamber
is attached a tube e, which is also fixed to the flue f, so that the water is free
to circulate through the bridge. I have shewn and described my Invention
as applied to one description of boiler, but the same system may be adapted to
other arrangements; and I would also observe, that if desired, two or more
bridges may in like mauner be adapted.

page_text: Having thus described and ascertained the nature of my said Invention,
and the manner in which the same is to be performed, I desire it to be under-
stood that I claim as secured to me under the above in part recited Letters
Patent, the application to boilers upon the tubular flue or other principle of a
bridge or bridges, constituted by a water chamber or chambers; and in such
arrangements I claim particularly the adaptation of openings at the lower and
upper parts of the said bridges or chambers communicating with the main
part of the boiler.
In witness whereof, I, the said George Adshead, have hereunto set my
hand and seal, this Fourteenth day of December, in the year of our
Lord One thousand eight hundred and fifty-eight.
GEORGE ADSHEAD. (L.S.)