US740304A - Boiler. - Google Patents

Description

No.. 740,304. A PATENTED SEPT. 29, 1903.-

J. MGWILLIA-MS.

BOILER.

APPLIUATION FILED APB. 27. 1903. n E0 MODEL. y v 2 SHEETS-SHEET 1.

2 jrg. j. 751

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2 SHEETS-SHEET Z.

K0 MODEL.

A Trams/5 ys.

WITNESSES.'

ite. 'video-.

UNITED STATES:-

atented September 2,9, IQO.

PATENT OFFICE.

BOlLEFi.-

SPECIFICATION forming part of Lettersratent ne. 740,304, dated 'september 29, 190e.

' Application filed April 27, 1903. Serial No. 154,469. (No model.)

T0 all whom t may concern:

. Be it known that I, JAMES MCWILLIAMS, a citizen o' the United States, and a resident of Jersey. City, in the county of Hudson and State of New Jersey, have invented4 a new and Improved`Boiler,`of which the following is a full, clear, and exact description. v

The object of the invention is to provide a new and improved boiler which is simple and durable in construction, comparatively cheap to manufacture, and arranged to insure quick circulation of the water. and to produce a large heatingsurface in a comparatively small space.Y

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and -then pointed-out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference4 indicate corresponding parts in both views.

Figure lis a cross-section of the improvement on the line l l of Fig. 2 arranged as a double furnace-boiler, and Fig. 2 is a'longitudinal sectional elevation of the same on the line 2 2 of Fig. 1`.

The shell A of the boiler consists, essentially, of front and rear heads A and A2, an

approxim'ately semicircular top AS, and a seg-V mental bottom Al, havinga radius considerably longer than that of the top A3 to form a strong brace for the top, as will be readily understood by reference to Fig. 1.

The bottom A4 of 'the shell A for a double furnace-boiler is connected by water-tubes B B with side mud-drums C C and by watertubes B2 B3 with a small mud-drum C2, and the said mud-drums C, C', and C2 rest on supports D, D', and D2, of which the supports D D2 sustain a grate E, and the supports D2 D carry a grate E'.

For a single furnace boiler the middle drum C2 and the sets ot' water-tubes B2 B3 are omitted and the single grate extends from the support D to the support D.

The water-tubes B B' are inclined upwardly and inwardly, while the water-tubes B? B3 are inclined upwardly and outwardly, as plainly shown in Fig. 1, and the said water-tubes form, with the mud-drums and the grates E E', the fire-box of the boiler.

The sides of the shell A are connected at the junction of the top A3 and bottom A4 by casing side plates F F with the side muddrums C C', and the forward and rearward ends of the side plates vF E" connect with a front head F2 and a rear head F3, ot which the latter is provided on the inside with a 'bridge-wall G, having an opening Gr directly under the bottom A4 of the shell toconnect with a connecting or combustion chamber H, establishing connection between the rear end of the lire-box and the rear end of a smokereturn ilue I, held in the heads A' and A2 and extending lengthwise through 'the shell A. The forward end of the smoke-return ue I is projected a distance beyond the front head A to support a smoke-.stack J, opening at its lower end into the front end of the smokereturn iiue I. The latter is provided at its front end with a suitable door l' for cleaning the smoke-return liue l Whenever it is deemed necessary. p

In order to strongly sustain the smoke-return llue l within the shell A, a plurality of braces K is employed, preferably in theshape of-flat plates set transversely and connected with angle-ironsK and K2, of which the angleirons K are secured to the under side of the top A3, while the angle-irons K2 are secured exteriorly to the top of the smoke-return liue I, as plainly indicated in the drawings. Staybolts K3 connect the bottom of the returndue l with the bottom A4 of the shell.

The combustion-chamber H is preferably formed of an inner casing H', covered on the outside by asbestos H2, held in place by a covering-plate H3, as plainlyindicated in Fig. 2, and the rear or outer wall of the casing H is preferably perforated, so as to prevent the plate from buckling when subjected to the high heat passing from the lire-box through the combustion-chamber to the return-Hue I. The front casing-head F2 is provided with suitable doors for giving access to the lireboxes and also with doors leading tothe ashpits formed below the grates EE' in the usual manner.

vNew by reference to Fig. l it will be seen that the water-tubes B, B', andA B2 are ar- ICO ranged in transverse sets of six or more tubes in depth for each set, and the sets extend throughout the length of thel mud-drums, so that the heat generated in the fire-boxes comes in .contact with the said tubes B, B', B2, and B3 to highly heat the water therein and to insure a quick circulation of the Water. It isunderstood that the innermost tubes of each set are heated to a higher degree than those farther out, and consequently the water will rise in the innermost 'tubes from the mud-drums C, C', and C2 into the shell Aand flowback again through the outermost tubes from the shell back into the muddrums without the use of large return-pipes.

By making the -bottom A4 comparatively flat it is evident that the upper ends of the tubes B, B', B2, and B3 can be readily connected with the bottom A4 and securely expanded and beaded in place. It will further be seen that by the arrangement described a very large heating-surface is provided in a comparatively small space, and hence the boiler is very serviceable for use as a marine boiler.

Having 4thus described my invention, I claim as new andv desire to secure by Letters Patent-, v

l. A boiler, comprising a shell, a returnflue suspended within the shell and having its forward end projecting beyond the front head of the shell and provided with a door therein, three spaced mud-drums extending longitudinally below the shell, grates between the drums, sets of water-tubes inclined upwardly and inwardly and connecting the side muddrums with the shell, two sets of water-tubes inclined upwardlyand outwardly and connecting the center mud-drum with the shell, a chamber connecting the rear end of the lire-box with the rear end of the return-flue, and a smoke-flue supported upon and opening into the forward end of the return-lille, as set forth.

l2. A boiler comprising a shell, a returnflue suspended within the shell, spaced muddrums extending longitudinally below the said shell, a grate between the mud-drums, sets of water-tubes connecting the mud-drums throughout their length with the bottom of the said shell, the said tubes forming with the grate a fire-box, and a connecting-chamber connecting the rear end of the'iire-box with the rear end of the return-flue, the said connecting-chamber having a perforated inner wall, a sheet-iron cover and an asbestos filling between the wall and cover, as set forth.

3. Aboilercomprisingashellhaving heads, a top section and a bottom section, a returnliue extending through the shell and held in the said heads, stay-bolts connecting the bot- 'tom section of the shell` with the bottom of y the said return-liuc, and braces connecting the upper portion of the top section of the shell with the top of the said return-flue, as set forth.

4. Aboiler,comprisingashellhavingheads, a top and a bottom section, a return-flue suspended in the shell and having its forward end projecting beyond the front head of the shell and provided with a door, a bridge-wall having anopening directly below the bottom section of the shell, mud-drums extending longitudinally below the shell, a grate between the drums, water-tubes connecting the mud-drums with the shell, a combustionchamber extending from the upper end of vthe bridge-wall to the rear head of. the shell and connecting the {ire-box with the return'- ue, and a smoke-line supported upon and opening into the projecting end of the return-line, as set forth.

In testimony whereof I have signed my name to this specification in the presence 'of two subscribing witnesses.

JAMES MCWILLIAMS.

Witnesses:

EDWARD K. MEsroK, GUsrAv SoHoNHER'r.

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