US555880A

US555880A - Boiler

Info

Publication number: US555880A
Authority: US
Publication date: 1896-03-03
Anticipated expiration: 1913-03-03

Description

(No Model.)

' 2 Sheets-Sheet K. J. PLENTY & J. H. MILLER.

BOILBRI Patented Mar. 3, 1896.

WITNESSES; p INVENTORSx W W' NlTE TATES ATENT FFICE.

JOSEPH PLENTY AND JOHN H. MILLER, OF JERSEY CITY, NEW JERSEY; SAID MILLER ASSIGNOR TO HENRY BERG, OF ORANGE, NEW JERSEY.

BOILER.

SPECIFICATION forming part of Letters Patent No. 555,880, dated March 3, 1896. Application filed May 20, 1895. Serial No. 549,885. (No model.)

To all whom it may concern.-

Be it known that we, JOSEPH PLENTY and JOHN H. MILLER, citizens of the United States, residing at Jersey City, in the county of En dson and State of New Jersey, have invented area of heating-surface, with a construction and assemblage of parts which shall be compact and economical to build.

The boiler is of the double tubular type, in which the water or steam is confined in the space between the inner and the outer tubes, the heat and products of combustion from the furnace passing around the outer tubes and through the inner tubes.

The invention consists of an arrangement of tubes and diaphragms with respect to the fire-chamber whereby a compact structure is obtained and the heat is economically dis tributed.

The invention also consists of the specific construction of the tubes.

Referring to the drawings, Figure 1 is a ver tical central section of the boiler. Fig. 2 is a horizontal half-section of the boiler, taken on linew m of Fig. 1. Fig. 3 is a section taken on line y y of Fig. 1, with parts broken away; and Figs. 4 and 5 show the tubes in detail.

It being the intention to construct a portable boiler, the inclosin g walls will be of sheet metal; but the invention claimed herein is not limited to an apparatus so constructed. Referring to the drawings by letter, A represents the fire-chamber, a the grate-bars, and a the fire-door. The rear wall of the firechamber is a metal plate or diaphragm b rising to a point about one-half the distance to the dome or top of the structure. A short distance in front of the rear wall, I), we locate a second vertical diaphragm b A space is left beneath the lower edge of this, but it extends entirely to the top of the structure. Across the front of the boiler, a short distance back of the front wall, 11 we locate another Vertical diaphragm 19 This rises from a point above the fire-door to a point within a short distance of the top plate 11 of the structure. Another, diaphragm b is arranged horizontally from the upper edge of diaphragm b to the diaphragm 12 The space between the outer walls and the three diaphragms b 1), and b constitutedraft-passages, to be hereinafter more particularly referred to. The upper portion of diaphragm N, which separates the vertical draft-passage from the horizontal draft-passage, is provided with openings b (Shown in Fig. 3.)

Two sets of tubes 0 and C, respectively, are used. The former are about twice the length of the latter and occupy the upper part of the structure below diaphragm I). Tubes C occupy the lower part of the structure and extend from diaphragm b to diaphragm b being supported by said diaphragms. Each tube is dup1ex,consisting of an external tube, 0, and an internal tube, 0. In the set C the tubes 0 establish communication between the vertical draft-passages at the rear and front of the structure, and in the set 0 the tubes 0' establish communication between the fire-chamber and the vertical passage at the rear of the structure. The outer tubes, 0, in both instances are exposed externally to the heat from the fire-chamber, which first rises vertically, then passes rearwardly over the top of diaphragm Z), thence downwardly and under the lower edge of diaphragm b thence upwardly through the draft-passage at the rear of the structure, thence forwardly through the tubes 0 of the set 0 to the vertical passage in the front part of the structure, and thence out through the chimneyD. A portion of the heat from the rear vertical passage also passes through the openings 19 and leads thence forward over the horizontal diaphragm b to the chimney.

The tubes are arranged in horizontal rows,

those of each row being connected together at their ends by cross-passages e. These passages connect together the water or steam space of each double tube. The cross-passages at the rear connect at each extremity, by means of elbows c, with a vertical tube f, which rises to an upper corner of the structure and leads thence to a large central steam or hot-water drum F by means of a cross-pipe f. The cross-passages at the forward end of the set of tubes 0 connect in a similar manner With vertical pipes g, which also rise to the upper part of the structure and there connect with the drum F. The lower ends of vertical tubes f connect respectively with single horizontal tubes 71, which lead forward and flank each side of the fire-chamber in the lower corners thereof. The lower ends of pipes 9 connect in similar manner with single horizontal tubes 2', flanking the fire-chamber at the upper corners thereof, but extending only to the diaphragm b. The tubes or drums t and h are connected together by a series of vertical tubes j, all of which are subjected to the heat from the fire-chamber. The crosspassages connecting the forward ends of the set of tubes G lead into short vertical pipes 70, which connect at their lower endsrespeetively with the two pipes h. Cold water is admitted to the pipes 7t through the plugs h, and hot water or steam is taken from the boiler through either or all of the plugs min the drum F.

A feature of the invention is the construction and assemblage of the duplex tubes. The inner and outer tubes are connected together at their ends by heads or couplings o. The coupling at one end has an opening 0, which the outer tube screws into. Opposite this opening and upon the same axis is another opening 0"*, which the end of the inner tube fits. the tubes has an opening 0 fitting the outer tube, and opposite it upon the same axis another opening 0 somewhat larger than the end of the inner tube. The parts are assembled by first screwing the two couplings onto the ends of the outer tube. The inner tube is then passed through opening 0 until it reaches opening 0 at the other end, when it is screwed into place therein. This tube is then secured by means of an-interiorly and exteriorly threaded bushing or nut 19, the outer thread of which fits opening 0 and the inner thread the tube. This nut 13 is provided with a shoulder 12, between which and the coupling 0 the tube-sheet or diaphragm in the boiler maybe clamped, as indicated in The coupling at the other end of.

Figs. 1 and 2 of the drawings. The crosspassages connecting the horizontal rows of tubes together are formed by short lengths of pipe q. These are threaded at each end and screwed into openings q in the sides of the coupling.

Having thus described our invention, we claim- 1. In a steam or hot-water boiler, the combination of a fire-chamber, two sets of duplex tubes, one longer than the other, three vertical parallel diaphragms, a draft-passage be yond each of the outer diaphragms and passages for the products of combustion, leading from the fire-chamber around the exterior of both sets of tubes, and through the shorter set of tubes to the passage beyond one of the outer diaphragms, then joining and leading together through the longer set of tubes, substantially as described.

2. In a steam or hot-water boiler, the combination of three vertical parallel diaphragms, draft-passages arranged beyond the outer diaphragms, two sets of tubes, one set extending between the outer diaphragms, and the other extendin gbetween the intermediate diaphragm and one of the outer diaphragms, a fire-chamber between an outer and the intcrmediate diaphragm, the draft from which J OS. PLENTY. JOHN H. MILLER. \Vitnesses:

MILEs MoCARnoN, JOHN KRAEGER.