IMPROVEMENTS IN STEAM-BOILERS
Year: 1880

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake,
& Co., Patent Agents, Southampton Buildings, London, for an Invention
of "IMPROVEMENTS IN STEAM-BOILERS." A communication from abroad by
Goldsbury H. Pond and James Otey Bradford, both of the City and State of
New York, United States of America.
.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at
the Office of the Commissioners of Patents on the 2nd January 1880.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN STEAM-BOILERS."
munication from abroad by Goldsbury H. Pond and James Otey Bradford, both
of the City and State of New York, United States of America.]
This Invention relates to steam-boilers.
[A com-
One object of the said Invention is to produce a double tubular boiler head cast
in a single piece of the strongest possible form, and in such a manner that the
large tubes may be properly expanded from within the head. A further object is
to provide for efficiency and cheapness of construction.
According to the said Invention I provide a double tubular boiler head composed
of a series of spheres with tubular passages from one to another, and a hand hole
connected with said passages, and with openings on one side of each sphere to
receive the end of a large wrought iron tube, and on the opposite side of each
sphere an opening to receive the end of a small wrought iron tube. The tubular
passages from the hand-hole and from one sphere to another are made larger than
the inside diameter of the larger wrought iron tubes to admit of a sectional
expanding tool being passed in from the hand-hole through the tubular passages,
and into the end of the large tubes within the sphere. After which a mandrel may
be passed through the opening made for the small tube, and thus effect the
expansion.
Another feature of the said Invention consists in suspending the tubular portion
of the boiler from the steam drum or chamber and over the fire-grate.
The expanding tool employed is the same as others in common use, and is made
in sections held together by a spring. The said small wrought iron tubes run
directly through the large wrought iron tubes and through the spherical parts of
each head, and are put in place after the larger tube has been expanded; the small
tubes are expanded on the outside in the usual manner. The small tubes are fire-
tubes. The space between the outside of the small tubes and the inside of the
large tubes is the water space. The steam chamber or drum is mounted on a
suitable frame or wall of brickwork, and the tubular portion of the boiler is attached
to and suspended from the steam drum over the fire grate.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Robert Lake in the Great Seal Patent Office on the
2nd July 1880.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN STEAM-BOILERS."
A com-
munication from abroad by Goldsbury H. Pond and James Otey Bradford, both
of the City and State of New York, United States of America.
This Invention relates to steam-boilers.
One object of the said Invention is to produce a head for a double tubular boiler
cast in a single piece of the strongest possible form, and in such a manner that the
large tubes may be properly expanded from within the head. A further object is
to provide for efficiency and cheapness of construction.
According to the said Invention I provide a head for a double tubular boiler
composed of a series of spheres with tubular passages from one to another, a hand-
hole being connected with said passages, and an opening being provided on one side
of each sphere to receive the end of a large wrought-iron tube, and on the opposite
side of each sphere an opening to receive the end of a small wrought iron tube.
The tubular passages from the hand hole and from one sphere to another are made
larger than the inside diameter of the larger wrought iron tubes to admit of a
sectional expanding tool being passed in from the hand-hole through the tubular
passages, and into the end of the large tube within the sphere, after which a
mandrel may be passed through the opening made for the small tube, and thus
effect the expansion.
Another feature of the said Invention consists in suspending the tubular portion
of the boiler from the steam drum and over the fire-grate..
t
Figure 1 18 a side elevation.party in section of my improved steam-Doner, with &
portion of two of the large tubes broken away at a and b to show the small tube
within.
Figure 2 is an end elevation partly in section of the same, with the large tube
broken away at b to show the small tube within..
Figure 3 is a plan or top view of the cast metal head..
Figure 4 is a bottom view of the same..
Figure 5 is a transverse section thereof.
Figure 6 is an enlarged view of one of the spheres with the end of the large tube
in place, and shews the expanding tool and the mandrel in position ready to effect
the expansion.
Like letters indicate the same parts throughout the Drawing,-
A represents the hand-hole; B, the spherical portions of the head; C, the tubular
passages; D, the large wrought iron tubes; E, the small wrought iron tubes; F, the
expanding tool; G, the mandrel to effect the expansion; H, the steam chamber or
drum; I, the openings in the ends of the spheres for the ends of the large tubes;
and J, the openings for the ends of the small tubes.
The expanding tool employed is the same as others in common use, and is made
in sections held together by a spring. The small wrought iron tubes E run directly
through the large wrought iron tubes D, and through the spherical parts B of each
head, and are put in place after the larger tube has been expanded. The small
tubes are expanded on the outside in the usual manner. The small tubes E are fire
tubes. The space between the outside of the small tubes and the inside of the
large tubes is the water space. The steam chamber or drum is mounted on a

page_text: suitable frame or wall of brickwork, and the tubular portion of the boiler is attached
to and suspended from the steam drum over the fire grate.
Having thus fully described the said Invention as communicated to me by my
foreign correspondents, and the manner of performing the same, I wish it under-
stood that I claim,—
First. A head for a double tubular boiler, consisting of a series of spheres and
tubular passages, a hand hole, and openings to receive the ends of the wrought
iron tubes, substantially as and for the purpose set forth.
Second. The cast metal spherical portions of the head, all connected together in one
casting, with the tubular passages of a larger diameter than the inside diameter
of the larger wrought iron tubes, and a hand-hole, each sphere having openings to
receive the two sizes of wrought iron tubes, substantially as and for the purpose
set forth.
Third. The cast metal spherical portions of the heads, in combination with the
wrought iron tubes D and E placed at right angles to the cast tubular passages C,
all constructed substantially as and for the purpose set forth.
Fourth. A double tubular boiler, the heads and tubular portions of which are
connected to and suspended from the steam chamber or drum, and over the fire
grate, substantially as and for the purpose set forth.
+
In witness whereof, I, the said William Robert Lake, have hereunto set my
hand and seal, this Thirtieth day of June, in the year of our Lord One
thousand eight hundred and eighty.
W. ROB. LAKE. (L.S.)