IMPROVE- MENTS IN COMBINED CALDRON AND FURNACE FOR AGRICULTURAL AND OTHER PURPOSES
Year: 1856

page_text: LETTERS PATENT to William Stettinius Clark, of 133, High Holborn,
in the County of Middlesex, Engineer, for tho Invention of "IMPROVE-
MENTS IN COMBINED CALDRON AND FURNACE FOR AGRICULTURAL AND OTHER
PURPOSES." A communication from Henry Newsham, of the City of
DL
-
PROVISIONAL SPECIFICATION left by the said William Stettinius Clark
at the Office of the Commissioners of Patents, with his Petition, on the
6th December 1856.
I, WILLIAM STETTINIUS CLARK, of 133, High Holborn, in the County of
Middlesex, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN COMBINED CALDRON AND FURNACE FOR AGRICULTURAL AND OTHER
PURPOSES," (being a communication from Henry Newsham, of the City of
Baltimore, State of Maryland, United States of America,) to be as follows:-
My Invention, so far as relates to the form of the caldron, consists in giving
it an elongated (instead of the cup shaped generally employed), and so
hollowing or arching the bottom lengthwise as to create a furnace fire chamber
within the boiler itself, and to be surrounded by its contents. The object in

page_text: thus forming the fire space is twofold:-first, to simplify the construction;
second, to isolate the heat of the flame from the outside of the boiler, to
facilitate the service by making it more approachable, the lessening the
radiation and economising of fuel. The arched chamber may be variously
constructed, but I prefer to corrugate the greater portion of the surface. A
great difficulty experienced in the ordinary caldron is, that its contents must
be removed by dipping out or removal of the caldron; this I overcome by my
mode of construction, admitting of the use of a large discharge cock, which by
its peculiar construction admirably adapts itself to changes of temperature, and
consists in constructing the body of the faucet or shell in a broken circle, that
its adjustment to the plug may be more perfect by means of a clamp screw
and elastic gum restrainer of the said clamp, in the forming an oiling or
lubricating chamber in the shell for the reception-of cotton waste for retaining
and distributing the lubricating material.
SPECIFICATION in pursuance of the conditions of the Letters. Patent and
of the above Order, filed by the said William Stettinius Clark in the
Great Seal Patent Office on the 30th June 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
STETTINIUS CLARK, of 138, High Holborn, in the County of Middlesex,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of December, in the year of our Lord
One thousand eight hundred and fifty-six, in the twentieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
William Stettinins Clark, Her special licence that I, the said William
Stettinius Clark, my executors, adininistrators, and assigns, or such others
as J, the said William Stettinius Clark, 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 COMBINED CALDRON AND FURNACE FOR AGRICULTURAL AND OTHER
PURPOSES," (a communication from Henry Newsham, of the City of Baltimore,
State of Maryland, United States of America,) upon the condition (amongst
others) that I, the said William Stettinius Clark, my executors or adminis-

page_text: trators, 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, pursuant to the Lord
Chancellor's Order, on or before the fourth day of July next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Stettinius Clark, 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 :-
My Invention, so far as relates to the form of caldron, consists in giving it
an elongated instead of the usual cup shape, and in arching the bottom
lengthwise, thus creating a furnace fire chamber within the boiler; the object
being twofold:first, simplifying the construction; secondly, to isolate the heat
of the flame from the outside of the boiler or caldron, thus facilitating the service
by rendering it more approachable; my mode of construction enables the use
of a large discharge cock at the lowest portion of the caldron, constructed as
follows:-The body of the faucet or shell is a broken circle, rendering its
adjustment to the plug more perfect by means of a clamp screw; secondly,
in the forming a lubricating chamber in the shell for the reception of cotton
waste. A, Figure 3, of the Drawing represents the plug detached from the
shell, on which is cast a square projection, by which the plug is turned; on
one side of A there is an opening (b) corresponding with one in the shell.
B, Fig. 4,) represents the shell, cylindrical in form, but not a full circle;
d, d, are flanges; (e) a clamping screw; f, a sheet of elastic gum; D, Fig. 5,
is an opening through the branch E of the shell; on one side of the shell is a
recess F and grooves 9, 9, for retaining the packing; on the upper part of the
shell is a stop (h) for arresting the plug in opening or closing by the lugs of
the cup coming in contact with the stop.
Fig. 1 exhibits a perspective view of the caldron; Fig. 2 exhibits a cross
section. A¹, the body of the caldron; c, c, side walls thereof cast in the same
piece as with b, b, the walls forming an arch B of the bottom of the caldron.
e, e, are flanged ribs cast on the bottom for receiving the furnace bars; D¹ is a
smoke pipe; and E' the discharge cock herein described.
Having described my improvements in combined caldron and furnace,
what I desire to secure by Letters Pattent is, first, constructing a caldron by
giving the bottom thereof an arched form, in the manner and for the purposes
escribed; secondly, in the providing the shell B of the discharge cock with

page_text: a chamber. F. and grooves g, g, for retaining the packing, substantially in the
manner and for the purposes set forth in the foregoing Specification.
In witness whereof, I, the said William Stettinius Clark, have hereunto
set my hand and seal, this Thirtieth day of June, in the year of our
Lord One thousand eight hundred and fifty-seven.
WILLIAM STETTINIUS CLARK. (L.S.)