IMPROVEMENTS IN STEAM BOILERS
Year: 1860

page_text: LETTERS PATENT to Thomas Hill, of Heywood, in the County of Lancaster,
Boiler Manufacturer, for the Invention of "IMPROVEMENTS IN STEAM
BOILERS."
Sealed the 4th May 1860, and dated the 1st February 1860.
PROVISIONAL SPECIFICATION left by the said Thomas Hill at the Office
of the Commissioners of Patents, with his Petition, on the 1st February
1860.
I, THOMAS HILL, of Heywood, in the County of Lancaster, Boiler Manu-
facturer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN STEAM BOILERS," to be as follows:-
I join the plates or divisions of the flues or fire tubes of boilers by means
of circular hollow bars, so that when rivetted to the plates or divisions an
additional heating surface is obtained, and an encreased strength of the flues.
Each division is made of one plate of metal forming a jump joint, which is
either welded together, or a strip of metal is rivetted to them. The hollows
of the said circular bars are placed either in the interior or exterior of the
flues.
.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Hill in the Great Seal Patent Office ou
the 1st August 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
HILL, of Heywood, in the County of Lancaster, Boiler Manufacturer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of February, 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 Thomas Hill, Her special licence that I, the said Thomas
Hill, my executors, administrators, and assigns, or such others as I, the
said Thomas Hill, 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
STEAM BOILERS," upon the condition (amongst others) that I, the said Thomas
Hill, 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 Thomas Hill, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement (that is to say):-
I join the plates or divisions of the flues or fire tubes of boilers by means
of circular or partially circular hollow bars, so that when rivetted to the plates
or divisions an additional heating surface is obtained, and an increased strength
of the flues, the hollows of the said circular or partially circular bars being
placed either in the interior or exterior of the flues.
The manner in which my Invention is to be performed will be clearly
understood by referring to the Figures and letters on the accompanying Sheet
of Drawings, in which Figure 1 is an end view, Figure 2, a longitudinal
section, and Figure 3, a sectional plan of a two-flued boiler having my

page_text: improved hollow bars, Figure 4 being a full-sized transverse section of one of
the hollow bars,
The flues are shewn at a, the several plates or divisions of which are joined
togother by rivetting round their ends the hollow bars b, the form of which
procures additional heating surfaces, and gives increased strength to the flues.
The said hollow bars also prevent collapse, and allow the expansion or con-
traction of the flues without rending the seams or injuring the boiler ends.
The hollows of the bars may be either in the interior or on the exterior of the
flues, and the bars may be of any required size and strength according to the
size of the boiler.
My improved hollow bars may also be applied with great advantage to the
outer casings and ends of the boilers, the hollows being placed either internally
or externally.
Having now described the nature of my said Invention and the manner in
which the same is to be performed, I desire it to be distinctly understood that
I do not confine myself to the precise details hercin set forth; but I claim
the construction and employment of oircular or partially circular hollow bars,
for joining together the plates or divisions of the flues of boilers, as herein
described and illustrated in the accompanying Sheet of Drawings.
In witness whereof, I, the said Thomas Hill, have hereunto set my
hand and seal, this Thirty-first day of July, in the year of our
Lord One thousand cight hundred and sixty.
Signed, sealed, and delivered by the
within-named Thomas Hill, in tho
presence of
E. J. HUGHES,
Patent Agent,
Manchester.
THOMAS HILL. (L.S.)