IMPROVEMENTS IN STEAM BOILERS, AND IN THE METHOD OF SETTING OR FIXING THE SAME
Year: 1853

page_text: LETTERS PATENT to Harry Bentley, of Salford, in the County of
Lancaster, Roller and Spindle Maker and Millwright, for the
Invention of IMPROVEMENTS IN STEAM BOILERS, AND IN THE METHOD
OF SETTING OR FIXING THE SAME."
Sealed the 21st April 1854, and dated the 22nd October 1858.
PROVISIONAL SPECIFICATION left by the said Harry Bentley at
the Office of the Commissioners of Patents, with his Petition, on
the 22nd October 1858.
I. HARRY BENTLEY. do hereby declare the nature of the said Inven-
tion for IMPROVEMENTS IN STEAM BOILERS, AND IN THE METHOD OF SETTING
OR FIXING THE SAME," to be as follows:-
I fix a vertical tube through the centre of each flue through which
the water passes, and I connect the flues at the back part or extremity
of the boiler so that the heat shall return through a third flue, and then
descend and pass through a brick flue under or at the side or sides of
the boiler, and so pass to the chimney. By this arrangement I gain
additional heating surface by the vertical tubes, and also by the third

page_text: Huc in the boiler, then by the additional brick flue or flues I cause
the smoke to be partially consumed, and a considerable saving of fuel
effected; which improvements will be clearly understood by reference to
the accompanying Drawings.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Harry Bentley in the Great Seal Patent Office
on the 22nd April 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
HARRY BENTLEY, of Salford, in the County of Lancaster, Roller and
Spindle Maker and Millwright, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent, bearing date the Twenty-second day of October,
in the year of our Lord One thousand eight hundred and fifty-three, in
the seventeenth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto nie, the said Harry Bentley, Her special
licence that I, the said Harry Bentley, my executors, administrators,
and assigns, or such others as I, the said Harry Bentley, ny exccutors,
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 of "IMPROVEMENTS
IN STEAM BOILERS, AND IN THE METHOD OF SETTING OR FIXING THE SAME,"
upon the condition (amongst others) that I, the said Harry Bentley,
by an instrument in writing under my hand and scal, should par-
ticularly 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 Royal Letters Patent.
NOW KNOW YE, that I, the said Harry Bentley, 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 following statement (that is to say):

page_text: I fix a vertical tube through the centre of each flue through which
the water passes, and I connect the flues at the back part or extremity
of the boiler so that the heat or flames from them will meet in the
combustion chamber, and then pass through the brick. flue or flues
to the chimney in the ordinary manner. By this arrangement I gain
additional heating surface by the vertical tubes, and also by the brick
Huc or flues I cause the smoke to be partially consumed, and a
considerable saving of fuel effected.. My said improvements will be
clearly understood by reference to the accompanying Sheet of Draw-
ings, in which the same letters of reference are used to represent
similar parts where different views or diagrams are shewn. Fig. 1,
is a sectional plan of my improved boiler; Fig. 2, an end view of the
same; and Fig. 3, a transverse section thereof, with two flues; Fig. 4,
au end view of a three flued boiler with my improvements; Fig. 5, in
transverse section thereof; and Fig. 6, a sectional plan. But although
I have only shewn plans with two and three flues, I can apply my
said improvements to any number of Hues. a, represents the outer
casing of the boiler; b, the furnace doors; c, the fire bars; d, the flues;
e, the vertical tubes containing water; f, the stays to strengthen
different parts thereof. The brick flues are not shewn in the Draw-
ings. It will be easily understood that the flames or heat from the fire
traversing the flues communicate heat to the vertical tubes, and heat
or evaporate the water contained in them, which is the manner I obtain
additional heating surface; and the said heat or flames from the flues
(however numerous they may be) meeting and concentrating in a
chamber at the back or extremity of the boiler causes a combustion of
the gases, and then passing through the brick flue or flues causes a
further combustion, thus consuming or partially consuming the smoke,
and causing a very great saving of fuel.
Having thus fully described the nature and particulars of my said
Invention, I desire it to be distinctly understood that I do not confine
myself to the exact details herein set forth, as such may be varied or
modified without departing from the principle thereof. But I claim as
my Invention, and which to the best of my knowledge and belief has
not been hitherto used within this realm, the general arrangement

page_text: and construction of the steam boiler with vertical tubes, as herein
described, and illustrated in the accompanying Sheet of Drawings.
In witness whereof, I, the said Harry Bentley, have hereunto set
my hand and seal, this Twentieth day of April, One thousand
eight hundred and fifty-four.
HARRY BENTLEY. (L.B.)
Signed, sealed, and delivered by the
within-named Harry Bentley in the
presence of
E. J. HUGHES,
Patent Agent,
Manchester.