A NEW OR IMPROVED STEAM BOILER
Year: 1880

page_text: LETTERS PATENT to Henri Adrien Bonneville, of the British and Foreign
Patent Offices, 18, Rue de la Chaussée d'Antin, Paris, France, and 5, Piccadilly,
in the County of Middlesex, Patent Agent, for an Invention of "A NEW OR
IMPROVED STEAM BOILER." A communication from Alexis Bernard and the
Firm of A. G. Boyé and Co., all of Marscilles, in France.
COMPLETE SPECIFICATION filed by the said Henri Adrien Bonneville at the
Office of the Commissioners of Patents on the 6th July 1880.
HENRI ADRIEN BONNEVILLE, of the British and Foreign Patent Offices, 18, Rue
de la Chaussée d'Antin, Paris, France, and 5, Piccadilly. in the County of Middlesex,
Patent Agent. "A NEW OR IMPROVED STEAM BOILER." (A communication from
Alexis Bernard and the Firm of A. G. Boyé and Co., all of Marseilles, in France.)
The Invention relates to a new or improved steain boiler, which con-ists
essentially of vertical boiler-tubes and outside horizontal fire-p'aces. The Inven-
tion is illustrated in the accompanying Drawing, of which Fig. I. is an outside
elevation; Fig. II., a vertical section through A, B, Fig. III.; and Fig. III, a
horizontal section through C, D, Fig. II. In these Figures the same letters of
reference indicate corresponding parts.
1 is the body of the boiler; 2, the fire-box with tubes and tie-rods; 3, the fire-
places with grate-bars; 4, cast iron supports carrying the tire-box; 5, the chimney.
The casing of the boiler is of cylindrical form, and provided with spherical caps,
the upper one furnished with man-hole and doors for cleaning incrustations; the
chimney is placed at the back of this cap. The bottom of the boiler may be flat or
spherical, according to the use for which it is intended, or according to the
pressure.
The fire-places are placed outside and horizontally; they are of cylindrical form &
concentric. They are provided with layers of water, cleaning doors, grates & their
supports, fireplace-doors, and ash-boxes.
The fire-box is cylindrical in form; its top & bottom form the tubular plates,
which are furnished with cross-pieces and tie-pieces. The lower tubular plate is
furnished with a man-hole under the lower end of the chimney to allow of access to
the boiler. The upper tubular plate is provided with the opening to which the
chimney is fixed.

page_text: The boiler-tubes are placed vertically, and in quincunx form in order to divide
the flame. They are introduced through the man-hole in the upper cap. They are
fitted through the top of the fire-box, and are riveted above and below, the space being
sufficient for a workman to work at his ease. Many of these boiler-tubes serve as
tie-rods to maintain the distance between the tubular plates.
The lower part of the chimney which passes within the boiler, and is consequently
plunged in steam, acts as an overheater. This chimney is furnished with a damper
in order to regulate the draught, and with a man-hole to give access underneath it to
the fire-box in order to clean the latter.
The boiler is furnished with two safety valves, two water-level tubes, six gauge-
cocks, a pressure-gauge, two feed-boxes, one for the feed-pumps, the other for the
starting-mover, and with a blow-off cock below.
- This boiler is so arranged that a man can get into all its parts to clean it and remove
the incrustation. Further, the fire-box being-large, the gas is utilized and is suspended
.among the tubes and warms them.
The incrustation does not attach itself to the tubes, these being vertical; it
passes through them, and is deposited on the bottom of the boiler, which risks no
overheating.
When the water begins to boil a current in the boiler is established by the water
in the boiler-tubes, and by this current the water at the bottom, which is generally
much less heated than that above, is the same as the latter, and the same steam is
generated. Hence, 1, a greater evaporation, the heating surface being direct; 2, an
economy of fuel of about 50%; 3, quick pressure; 4, an equal expansion in all
parts of the boiler.
Having thus described the nature of the said Invention I claim and wish to secure
by Letters Patent, the improvements in steam-boilers.above described and represented
in the accompanying Drawings.
In witness whereof, I, the said Henri Adrien Bonneville, have hereunto set my
hand and seal, this Second day of July, in the year of our Lord One thousand
eight hundred and eighty.