US799198A - Steam-generator. - Google Patents

Description

No. 799,198. PATENTED SEPT. 12, 1905. W. H. SHAPER.

STEAM GENERATOR.

APPLICATION nun MAE. e, 1905.

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UNITED STATES \VILLIA 11. SHAFER, OF IN(/INNA' PATENT OFFICE.

Fl, 01110, ASSIGNOII TO THE AI'IItICNS FIRE ENGINE COMPANY, OF CINCINNATI, O11 IO, A (l(,)ItI()RA'I.ION OF OHIO.

STEAM-GENERATOR.

Application filed March 6,

Specification of Letters Patent.

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Be it known that I, \VrLLL-m .171. Slmrnn, a citizen of the United States, residing at Cincinnati, Ohio, have invented a new and useful Improvement in Steam-Generators, of which the following is a specification.

My invention relates to steam-generators adapted to use for lire-engines and other purposes; and the objects of my improvement are to provide concentric shells inclosing annular water and steam chambers; a series of units of circulation and generation, each com- I municatlng with said chambers, said units each consisting of helical ascending and straight d escending tubes, whereby the circulation is automatically maintained in one and the same direction; to inter-pose the straight tubes between the helical tubes and the steam-chamber, whereby the water may be separated from the steam before reaching the steam-chamber, and to provide such construction and assemblage of the various parts as to obtain the greatest eiiiciency and durability combined with simplicity and economy. These objects are attained in the following described mannor, as illustrated in the accompanying drawings, in which Figure 1 is an elevation with parts in diametrical vertical section of a steam-generator embodying my improvement; Figs. 2 and 3, plans, respectively, with parts broken away, of the top and inverted bottom headers and their connections; and Fig. a, a vertical longitudinal section of a top and a bottom header.

i In the drawings, a and I) represent concentric inner and outer shells surmounted by a hood 7, 8 an annular water- leg encircling firebox 9, and 11 an annular steam-chamber separated therefrom by the water-line rt ("1, all being constructed and arranged in the ordinary manner. A series of tubular top headers 12, secured to and substantially radiating from central plate 13, are removably supported within the inner shell on brackets lei, secured thereto. They each communicate with closed tubular arms 15, which are extended laterally from opposite sides thereof in the form of an arc. The said contiguous arms of adjacent headers are secured together by means of bolts 16 and form a continuous ring adjacent to and concentric with the inner shell. A series of bottom headers 17, similar to the top headers, substantially radiate in registration therewith from central bottom plate 18, to

which they are secured. They each terminate in closed tubular arms 19, which extend laterally from opposite sides and in registration with corresponding arms 15. Corresponding top and bottom headers communicate through a series of connecting helical tubes 21 and the corresponding arms thereof through a series of connecting straight vertical tubes 22, thus forming an independent unit of circulation and generation.

Removable discharge-pipes 23, formed with return-bends, communicate with the extremity of the respective arms 15 and with the steam-chamber at points in a plane above the arms, and removable supply-pipes 24, similar thereto, communicate with the extremity of respective arms 19 and with the water-leg at points in a plane below said arms.

The top and bottom headers are secured to their respective central plates at a tangential angle in the same direction from corresponding radii sufficient to bring the line of openings 25 therein substantially in a plane at right angles to the extremities of the series of helical 3 tubes which are respectively secured in said openings. Openings 2(i,provided with removable plugs, are formed in the headers directly opposite the respective openings 25 to permit access to the extremities of the helical tubes for swaging or other purposes.

In operation the most rapid generation of steam occurs within the helical tubes, owing to their central location and inclined exposure i to the ascending heat-currents from the lirebox. In the passage of the steam from the helices its direction is abruptly changed by the opposite inner wall of the corresponding top header, by the transverse interior wall at the juncture of the arms, by the extremities of the arms, and by the turns in the dischargetubes, by which it is elevated and delivered in the steam-chamber in a plane above said arms. The water being less volatile than the steam is thus retarded and separated therefrom and automatically tends to return through the vertical tubes and complete a cycle of circulation to the bottom of the helices again. In the passage of the water from the vertical tubes through the bottom arms and header any deficiency from conversion to steam is supplied from the water-leg through the supply-pipes. In this manner an independent unit or cycle of circulation and generation is interposed and automatically malntained between the water-leg and the steamchamber.

Having fully described by improvement, What I claim as my invention, and desire to secure by Letters Patent of the United States, 1s

1. The combination of concentric shells inclosing an annular water and steam chamber a top header supported thereby and provided with a discharge-pipe, a bottom header provided with a supply-pipe, a helicaltube concentric within the shell, and a straight tube outside of the circle thereof, both tubes forming channels of communication between said headers.

2. The combination of concentric shells inclosing an annular water and steam chamber a top header supported thereby and provided with a pipe which discharges in a higher plane, a bottom header provided with asupplypipe, a series of concentric helical tubes, and a series of straight tubes located without the space embraced by the helical tubes, both series of tubes communicating with said headers.

3. The combination of a top and a bottom header each having a lateral tubular arm on one end, a helical tube connecting said headers together and a straight tube extending between the arms.

4:. The combination of a top and a bottom header each formed with a lateral arm, a helical tube communicating between the headers, and a straight tube communicating between the arms outside thereof.

5. The combination of a series of headers secured to a common center piece and extending therefrom at the same acute angle to corresponding radii, for the purpose specified.

6. The combination of a series of headers, respective series of concentric helices secured thereto, said headers being secured to a common center piece and at an acute angle to corresponding radii.

7 The combination with a top header, a helical tube secured at rightangles thereto, a lateral arm formed on the header, a dischargepipe formed with return-bends secured at right angles to the arm, and terminating in a plane above the header, and a vertical tube depending from said arm, for the purpose.

specified.

8. The combination of a series of top headers radiating from a common center and terminating in lateral tubular arms having closed ends, means to secure the contiguous arms of adjacent headers together to form a continuous connection between them, of a series of helical tubes communicating with the header, a series of vertical tubes communicating with the arms thereof and pipes extending from the arms and arranged to discharge in a higher plane.

9. In a steam-generator, a series of headers secured to a common center piece and extending therefrom atan acute angle to corresponding radii.

10. In a steam-generator, a header formed with openings in a helical line adapted to the engagement of tubes therein, and with a lateral arm, for the purpose specified.

11. In a steam-generator, a series of headers secured to a common center piece at an acute angle to corresponding radii and terminating in lateral arms removably connected together.

12. In a steam-generator, a series of radiating headers secured to a common center piece at one end and each terminating at the other end in a lateral arm in the form of an arc concentric to the center piece.

13. The combination of a series of radiating top headers terminating in lateral arms removably connected together, a series of similar bottom headers formed with arms and registering therewith, a series of helical tubes communicating with corresponding top and bottom headers, and a series of straight tubes communicating with the respective arms thereon.

WILLIAM H. SHAFER.

Witnesses:

ALBERT A. MOEBUS, R. S. CARR.

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