Year: 1888

page_text: Date of Application, 11th Aug, 1888
Specification Accepted, 2nd Nov., 1888
I, CHARLES WARD, of Charleston, in the County of Kanawha and State of
West Virginia, in the United States of America, Mechanical Engineer, do hereby
declare the nature of this invention and in what manner the same, is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention has relation to vertical steam-boilers of cylindrical form, wherein
tubes of small diameter are used to contain the water and generate the steam, and its
objects are to obtain a rapid and perfect circulation of the water and to increase
economy in the development of steam power.
Fig. 1 of the accompanying drawings is an elevation of my boiler, shown partly in
section; Fig. 2 is a plan on the line x, x of Fig. 1 ; and Figs. 3 and 4 are enlarged
details.
A represents a cylindrical ashpit, stiffened at the base by an angle-iron, a ; B is a
hollow ring, having brackets, b, b, upon which rest a circular bar, C, to support the
grate bars, c, c. A T-shaped flange, 6', projects from the ring B, and supports the
latter upon the rim of the ashpit. Above the grate-door opening, a hollow arch, D, is
formed, supported upon and connected with the hollow ring, B, by certain of the water-
tubes, and also connected above with the system of water-tubes; all as shown in Fig. 3.
To allow for expansion, caused by heat from the fuel, I have found it advisable to
make this arch in suitable steam-tight sections, as indicated in Fig. 3. The furnace is
closed by an ordinary door, E.
Tubes, F, F, connect at one end with the hollow ring, B, and at the other with a
drum, G, indicated in Fig. 1. The drum being of shorter diameter than the hollow
ring below, it is necessary to concentrate the tubes, F, F, upon the drum by bending
them horizontally into two or more planes. The tubes connect with the hollow ring, B,
in two or more rows, as indicated by Fig. 2.
A pocket, I, runs around the interior of the drum, joining the vertical wall thereof
just below the vent line of any of the rows of tubes concentrating upon the drum. A
conduit, i, fed in any convenient manner by a cold water pipe, delivers the feed water
into said pocket by means of a slot formed in the bottom of said conduit, and from the
D

page_text: pocket the water current descends the adjacent row of the tubes F; F, into the hollow
ring, B, and, leaving its sediment therein, ascends the unoccupied tubes of the same
system and is discharged into the lower space of the drum. The angular bottom of
the drum connects with hanging tubes, H, H, and the purified water current descends
the sub-tubes, h, h, which are open at both ends, and being now highly vaporised, it
ascends the uptake tubes, h¹, h', and is again discharged into the drum. It then
descends the pocket R, which runs around the drum, the water and impurities draining
into and through the tube, r, connected with said pocket at any convenient place along
its base, and the dry and pure steam, ascending the annular chamber S, is conveyed to
the engine through a suitable pipe, s, connecting at any convenient place along the
upper part of said chamber.
The boiler has an outer casing, K, and an inner casing L, the latter provided
with any suitable lining, M. The two casings are separated, so as to form a non-
circulating air-chamber, N, which acts as an uptake for the gases of combustion.
But either of the casings may be omitted in the construction of the boiler, if
desired.
Blow-off pipes P, P, with suitable valves, p, p, connect with the hollow ring, B, for
the discharge of sediment from the boiler by the action of the superheated water within
said ring.
I may prefer to introduce the feed water at some place lower down than the plane
of the drum G, in which case the pocket I, and its conduit i, would be attached to and
connected with the tubes F, F, in any familiar and suitable manner, thus reducing the
necessary height of the boiler.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
-
1. The combination in a steam-boiler of a horizontal, hollow base ring, with a
system of vertical tubes concentrating upon a steam drum placed above said base ring;
said drum having the tubes H, consisting in the subtubes h, and the uptakes, and
being further provided with the pocket R, having the drain tube r, and with the steam
chamber S, having the outlets, all substantially as hereinbefore described, for the
purpose of generating steam for economic uses.
2. The combination in a steam-boiler of the ashpit A; the hollow ring B; the
annular bar C, having grate bars c; the hollow arch D; the door E; the tubes F ;
the drum G; the tubes H; the casing K; the casing L; and the pipes P; said
drum being provided with the pocket I; the pocket R; and the annular chamber S ;
the whole constructed and arranged substantially as hereinbefore set forth and shown,
and for the purposes herein described.
Dated this 11th day of August 1888