IMPROVEMENTS IN THE CONSTRUCTION OF TUBULAR BOILERS FOR HEATING BUILDINGS FOR HORTICULTURAL AND OTHER PURPOSES." PROVISIONAL SPECIFICATION
Year: 1877

page_text: LETTERS: PATENT to Edward George Rivers, of Cologne Road, Wandsworth,
in the County of Surrey, Civil Engineer, for the Invention of "IMPROVEMENTS
IN THE CONSTRUCTION OF TUBULAR BOILERS FOR HEATING BUILDINGS FOR
HORTICULTURAL AND OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said Edward George Rivers..at
the Office of the Commissioners of Patents on the 28th May 1877:
EDWARD GEORGE RIVERS, of Cologne Road, Wandsworth, in the County of
Surrey, Civil Engineer. "IMPROVEMENTS IN THE CONSTRUCTION OF TUBULAR
BOILERS FOR HEATING BUILDINGS FOR HORTICULTURAI, AND OTHER PURPOSES.
"
My Invention relates to improvements in the construction of tubular boilers for
heating water to warm conservatories, greenhouses, and other buildings for horti-
cultural or other purposes.
The main objects of the said Invention are as follows, namely:-
Ist. An improved method of securing the. tubes, whereby repairs are greatly.
facilitated.
2nd. Obtaining perfect circulation through the tubes.,
3rd: Prevention of deposit of sediment within the tubes.
4th. Utilization of the flue heat. .
My improved boiler is constructed with pairs of wrought-iron or other suitable
tubes, set liorizontally, or nearly. so, above the fire-bars and secured to a saddle-
shaped circulating chamber, constructed of either wrought or cast iron, and which
forms the front of the boiler. Each tube has a screwed portion which passes through
this chamber, and the portion that extends through the said chamber may be plain
or provided with a screw thread; the communication with the water in the same
Each tube is
being maintained by means of an aperture or apertures in the tube.
secured by a screw nut on the face of the circulating chamber which brings a back
nut on the tube into close contact with the back of the said chamber.
1
The back nut may be either plain or may have a taper collar or ferrule, or be used
in connection with the same. The said tubes are supported at their back or inner

page_text: end by small brackets fixed around the interior of the furnace. Any of these tubes
can be removed for repairs or renewal by simply unscrewing the face nuts, shifting
the tubes back, and taking them from the interior.of the furnace through the fire-
door without disturbing the setting of the boiler in any way.
The said circulating chamber is divided by an H iron, or other suitable stiffener
or stay piece designed to separate the flow and return currents of water, and to resist
the strain upon the chamber due to the screwing up of the tubes by the aforesaid
nuts.
"
.
To ensure a free circulation of the water through the boiler and the flow and
return pipes, I sometimes incline the said tubes from the front downward to the
back of the furnace.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edward George Rivers in the Great Seal Patent Office on the 27th
November 1877.
EDWARD GEORGE RIVERS, of Cologne Road, Wandsworth, in the County of
Surrey, Civil Engineer. "IMPROVEMENTS IN THE CONSTRUCTION OF TUBULAR
BOILERS FOR HEATING BUILDINGS FOR HORTICULTURAL AND OTHER PURPOSES."
My Invention relates to improvements in the construction of tubular boilers for
heating water to warm conservatories, greenhouses, and other buildings for horti-
cultural or other purposes.
The main objects of the said Invention are as follows, namely:-
1st. An improved method of securing the tubes, whereby repairs are greatly
facilitated.
2nd. Obtaining perfect circulation through the tubes.
3rd. Prevention of deposit of sediment within the tubes..
4th. Utilization of the flue heat.
My improved boiler is constructed with pairs of wrought-iron or other suitable
tubes; set horizontally, or nearly so, above. the fire-bars and secured to a saddle-
shaped circulating chamber, constructed of either wrought or cast iron, and which
forms the front of the boiler. Each. tube passes through the chamber, and the
portion that extends through the said chamber may be plain or provided with a
screw thread, the communication with the water in the said chamber being
maintained by means of an aperture or apertures in the tube. Each tube is secured
by a screw nut on the face of the circulating chamber, which brings the back joint
on the tube into close contact with the back of the said chamber.
The back joint may be either plain or may have a taper collar or ferrule, or be
used in connection with the same. The said tubes are supported at their back or
inner end by small brackets fixed around the interior of the furnace. Any of these
tubes can be removed for repairs or renewal by simply unscrewing the face nuts,
shifting the tubes back, and taking them from the interior of the furnace through
the fire-door without disturbing the setting of the boiler in any way.
The said circulating chamber is divided by a diaphragm, or stiffener, or stay
piece designed to separate the flow and return currents of water, and to resist the
strain upon the chamber due to the screwing up of the tubes by the aforesaid nuts.
The deposit of sediment in the boiler is prevented by the rapidity of circulation
consequent upon this division of the said chamber by the diaphragm.

page_text: To ensure a free circulation of the water through the boiler and the flow and
return pipes, I sometimes incline the said tubes from the front downward to the
back of the furnace. To utilize the flue heat I arrange tubes in the flues in
combination with those over the grate bars.
The said Invention is illustrated in the accompanying Drawing, in which
Figure 1 is a front elevation, and Figure 2 a longitudinal section on the line x, x,
Figure 1.
Like letters indicate the same parts in both Figures.
a is the said saddle-shaped circulating chamber; a¹ is the dividing diaphragm of
the said chamber; b, b, are the tubes over the fire bars; c, c, are the brackets for
supporting the same; d, d, are tubes in the side flues; e, e, are branch flow pipes;
ff, are doors for removing the tubes from the side flues; 9, 9, are the apertures in
the parts of the tubes passing through the chamber a for the passage of the water.
The said tubes may be constructed of any required dimensions.
Having thus fully described my said Invention and the manner of performing the
same, I wish it understood that I claim,-
First. The tubular boiler constructed with the saddle-shaped circulating chamber
properly divided to ensure the separation of the flowing and returning currents,
and the prevention of deposit of sediment, and the horizontal or nearly horizontal
tubes placed above the fire-bars, and in which boiler the parts are constructed and
combined as shewn in the accompanying Drawing, and as above described.
Second. The novel method of securing the tubes in the said boiler as above set
forth, and for the purposes specified.
Third. The tubes in the flues in combination with the tubes over the grate bars
as above set forth, and for the purposes specified.
In witness whereof, I, the said Edward George Rivers, have hereunto set my
hand and seal, this Twenty-fifth day of November, in the year of our Lord
One thousand eight hundred and seventy-seven.
EDWARD GEORGE RIVERS. (L.S.)