Improved Tubulous Boiler.
Year: 1898

page_text: Date of Application, 4th Aug., 1898-Accepted, 5th Nov., 1898
Improved Tubulous Boiler.
I, PIO FERRO, of No. 2, Via Nino, Bixio, Genoa, Italy, Engineer, do hereby
declare the nature of this invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:-
The boiler, which I desire to protect by Letters Patent, consists of tubes con-
taining water and surrounded by gases, produced by the combustion of the fuel.
Figure 1, on the annexed drawing, shows a vertical longitudinal section of the
boiler.
The left half of Figure 2, shows a vertical cross section through the steam
drums. The upper part of the right half of Figure 2 shows a section through
the smoke-box and the lower part of the same half shows part of the furnaces
and doors. The boiler is composed essentially of two characteristical types of
elements, showed in the drawing by the reference letters A and B.
Each element of the type A consists of an horizontal tube A, on which are con-
nected the vertical, or nearly vertical, tubes N.
A series of these elements is arranged so as to form, by the lower part of the
horizontal tube A, the crown of the furnaces I. The vertical tubes N act as
upcast tubes and are firmly screwed, at convenient intervals, to the steam drums D
and E and to the horizontal tubes A.
The elements of the type B consisting of the inclined tubes 0 and of the
tube-boxes B and M form the greater portion of the heating surface. The inclined
tubes are firmly screwed, at convenient intervals, to the tube-boxes B and M
The tube-boxes B are connected to the steam drum D, so far apart on it so as to
leave between the opposite tube-boxes M the necessary space for the passage of
the gases to the smoke-box. The whole element B acts as upcast tube. The
tubes C, being in contact, form a water wall, and complete the furnaces, that is
they form the sides of the furnaces and of the combustion chambers.
The tubes D and E serve as reservoirs for the steam generated by the water
contained in the elements A and B and tubes C.
The feed water inlet is in the tube F. The water after having been heated by
steam, is supplied by special down-cast pipes to the elements A and B and to the
tubes C.
The horizontal tubes of the elements A and the tube-boxes M, may freely follow,
without resistance, the expansion and contraction of the tubes N and O exposed
to the action of the hot gases.
The fuel is stoked on the fire-grate, formed by the fire-bars H, of the furnaces I.
The products of the combustion from the furnaces I, through the passage P
enter in the chambers containing the tubes N and O. In these chambers the
gases freely circulate between the interlaced tubes, passing in the smoke-box K,
through the spaces between the tube-boxes M, of the elements B and from there
mising to the funnel L.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
1. A return tubulous boiler, the return of the flame being obtained by
space formed practically by the contact of a series of tubes A.
a water
2. In a tubulous boiler, as set forth in Claim 1, the characteristical type of the
element A, which forms the crown of the furnaces and serves as tube-boxes to the
vertical tubes N.
3. In a tubulous boiler as set forth in Claim 1, the passage of the gases through
the spaces between the tube-boxes M, of the element B.
4. In a tubulous boiler, as sat forth in Claim 1, the arrangement of the hori-
zontal tubes A and of the tube-boxes B, which form one of the ends of each
element A and B and free to follow the movements of the expansion and contrac-
tion of the tubes exposed to the action of the hot gases.
5. In a tubulous boiler, as set forth in Claim 1, the connection of each end of
the tubes being firmly screwed to the tube-boxes, each one of the tube-boxes of
each element of the type A and B being movable.
D
1
мау от
ury 1090.
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.