AN. IMPROVED HORIZONTAL TUBULAR BOILER
Year: 1868

page_text: LETTERS PATENT to Thomas Hungate Preston Dennis, of Chelmsford,
in the. County of Essex, Horticultural Engineer, for the Invention
of "AN. IMPROVED HORIZONTAL TUBULAR BOILER."
PROVISIONAL SPECIFICATION left by the said Thomas Hungate
Preston Dennis at the Office of the Commissioners of Patents, with
his Petition, on the 13th June 1868.
I, THOMAS HUNGATE PRESTON DENNIS, of Chelmsford, in the County
5 of Essex, Horticultural Engineer, do hereby declare the nature of the
said Invention for "AN IMPROVED HORIZONTAL TUBULAR BOILER," to be as
follows:-
My Invention has for its object improvements in the construction of
boilers for the purposes of heating hot-water pipes or other surfaces,
O and consists of a series of cast or wrought iron or other metal tubular
rings with blocks, sockets, flanges, or other connections at one or more
points by which the tubular rings may be attached to each other so that
any number of rings may be readily put together to form one boiler.
The boiler may be square, oval, round, triangular, or any other shape or
form, the tubes also of which the rings are composed may be varied in

page_text: shape or form from time to time without departing from the principle.
Top or bottom water boxes or chambers and fire-bars with waterways
through them may also be connected thereto. The usual sockets for
the flow or return pipes can be affixed to any of the tubular rings, or
the tubular rings may be cast with the sockets upon them.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Hungate Preston Dennis in the Great Seal
Patent Office on the 11th December 1868.
TO ALI TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
HUNGATE PRESTON DENNIS, of Chelmsford, in the County of Essex,
Horticultural Builder, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of June, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
first year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Thomas Hungate Preston Dennis, Her
special licence that I, the said Thomas Hungate Preston Dennis, my
executors, administrators, and assigns, or such others as I, the said
Thomas Hungate Preston Dennis, 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 "AN IMPROVED HORIZONTAL TUBULAR BOILER," upon
the condition (amongst others) that I, the said Thomas Hungate Preston
Dennis, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, 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 Letters
Patent.
NOW KNOW YE, that I, the said Thomas Hungate Preston Dennis,
do hereby declare the nature of my said Invention, and in what manner

page_text: the same is to be performed, to be particularly described and ascertained
in and by the following statement, that is to say :-
My Invention has for its object improvements in the construction of
boilers for the purpose of heating hot-water pipes or other surfaces,
and consists of a series of cast or wrought iron or other metal tubular
rings with blocks, sockets, flanges, or other connections at one or more
points by which the tubular rings may be attached to each other so
that any number of rings may be readily put together to form one
boiler, each tubular ring being by preference wrought, formed, or cast
separately, but if it should appear more desirable the whole or any two
or more parts of the said boilers which are in this Specification described
as a separate section or portion may be wrought, formed, or cast in one
piece. The boiler may be square, oval, round, triangular, or any other
shape or form, the tubes also of which the rings are composed may be
varied in shape or form from time to time without departing from the
principle. Top or bottom water boxes or chambers and fire-bars with
waterways through them may also be connected thereto. The usual
sockets for the flow and return pipes can be affixed to any of the
tubular rings, or the tubular rings may be cast with the sockets upon
them.
And in order that my Invention may be more fully understood I will
proceed to describe the Drawings hereunto annexed.
Figure A. is a plan of one of the sections or tubular rings of which the
boiler is composed; a, a, a, a, are the connecting blocks; b, b, b, b, the
tubes.
Figure B is a plan of the entire boiler consisting of a series of the
sections or tubular rings A; c, c, c, c, are sockets to which inlet and
outlet pipes can be connected.
Figure C is a section, and Figure D an elevation of the boiler. The
dotted lines in Figures C and D represent a connecting bolt by which
any desired number of sections or tubular rings are held together to
form a boiler. d, e, are blocks into which the connecting bolt is fixed
or through which it is passed, and is secured by a nut or key or in any
ordinary method.
Figure 1 represents sections of the connecting blocks, the joints of
which are usually made with cement, but they may be made with lead,
india-rubber, or any elastic or other packing, or they may be faced and

page_text: fitted together in any way that may from time to time suggest itself, as,
for instance, by the different arrangements of the connecting blocks
shewn by sections 2, 3, 4, and 5; or these connecting blocks may be
fitted and screwed together with wrought iron or other metal tubes
and connections, or may be made of welded wrought iron or other metal.
Figures E, F, and G are modifications of the shape only of the sections
or tubular rings of which the boiler is composed.
Figure H represents a plan of one of the sections or tubular rings with
inner rings attached thereto, which arrangements can be applied to any
of the shapes A, E, F, G, or others that may suggest themselves.
Figure I is a section of a boiler composed of sections or tubular
rings, as shewn by Fig. H.
Figure K is another modification or arrangement of the sections or
tubular rings of which the boiler is composed, having only one con-
necting block a.
Figure L is a plan shewing an arrangement by which any of the
foregoing shapes or forms of sections or tubular rings may be fitted
with water furnace bars.
Figure M is a section of the same.
Figures 6, 7, 8, and 9 are sections of the tubes of which the tubular
rings are formed and which may be further varied in shape if required.
And that which I chiefly claim as my Invention is the construction
of a hot-water boiler by the connecting together of any number of the
horizontal tubular rings or sections before described in any manner or
by any suitable connections, so that one boiler may be made from any
number of them, and that the power of such boiler may be increased by
the addition of one or more rings, and its power decreased by the removal
of or disconnecting one or more of the said horizontal tubular rings.
In witness whereof, I, the said Thomas Hungate Preston Dennis,
have hereunto set my hand and seal, this Twenty-eighth day of
November, in the year of our Lord One thousand eight hundred
and sixty-eight.