US934718A - Steam-boiler. - Google Patents

Description

E. F. EDGAR.

STEAM BOILER.

APPLICATION FILED MA1L30, 1909! Patented Sept. 2L 1809.

2 SHEETS-SHEET l.

WITNESSES: (5.23

E. F. EDGAR.

STEAM BOILER.

APPLICATION FILED MAR. so, 1909.

Patented Sept. 21, 1909.

2 SHEETS-SHE$BT 2.

l/VVE/WOR 2/44., 22

my invention. l! 1g. 5 is a sectional siiic ele-' a ville Araceli-tiller Ulcer all r w 2r acme r. wcccimrmwm; r

s'rmlwcciiliiie.

l fipecjfication of Letters f m g i @qgggfg (I fiiaplication mm Iaich 3e, 19cc. serial esmw.

, draft bail le's located therein. @n we siclc, W11) filial l, E. F; Emmi, citizen fi e airlift are slicwn hanging clown. Tn" nnd resident cf Wcccl- There is z'tlie cicicn w e. boiler is vvcrlv e cmzcc g cf MidalleseXa-fil ccoiici' ijlIGI position slnm'n have invented certain flew in ll'cliiecl cpcr position when Siam-Boilers, the 0399 1e ashes mi of llac nving is a specification. Water l c I tlircugi clean cut alccrll. igure 1 s a irciit elc iraticn View parfi in Brick arch 5 will prccmce a very high fur 5Q full and part in section cfaboiler embccly'iiig mice iemperaliirc t0 the fire on, the

' rate and in conjunction 'Wli'll' are brick vaticn View 21% line A-B in Fig. 1. Fig. lining 18' i0 the eml casings mid bulile walls 3 is an enlz-irgrccl demil section View of one 4, help to maintain the high temperature tribe cxpzzintlcd in sheet of upper (lrui'n. rcthe gases, until iliey reach the centercf 55 My object in inventii'i'g {his licil'er is to the upper ccmlmstion chamber over brick.

.15 produce a bciler capable of working at oiie. arch 5, Where they enter among Water tubes thousand "cmimls pressure or more and cle- 3, and page hick t'c the draft exii becwcen liv y stem; to an cngix'ie' with high bafii e Walls cuter casing 8. VJlule m 11 and a boiler that will always these passages of which there are fc u' they 7:;

v v is heating sm-face'a'ml capcare cause-6' in mcvc slowly by mljusl'cble 2! l'rle ct? pa'scrlnc a very high furnace temcirclilialrles 24? and by the length cf licfllc PQX'il-UIFQ W11 1 escaping gases ebmifl the W's ills 4c given clislancc of travel sullicicni; fiemperzrim'c of the steam and a boiler of long to 'ccci them rlcwn to the temperature of life 21ml little repairs. The construction and l ke Water in the Water tubes and :is' tliey value of these fcatnres I will hereafter e'xcool they drop to the bottom cf the section 25 plain. amo iglhe tubes anal pass out into uplake Deals' of c0ncfirucii0m-h Water* and 10 untler adjustable draft baffle 24:. The steam drum, 2, Wflil and mud drum, 3, Waescaping nmler these adjustable clra'ft filer lJYIbQS, hbnill'e will, 5', brick arch, 6, non-' bellies 241 w i l be in this boiler abcut- 5% 8G combustible protection cc bottom of upper (legrees Rl'ilQIllil8ll3 which the temperature drum, 7,1rcc-ccmbustihle protection of lower of the S7 armat cm thousand poumls pres-- drum, lig'lii brick covering on outsifie of sure. z eins lxigl: but not when taking vute'r tubes 3, U, asbestos outsidecovering, in'lc con 'JTZKU'GH the economy (lGllVGil l);

10. u alakesl containing acl' nslable draft half ,the engine at time pressurc and the inrnacc 7 L, 5

fies clean out door and draft exit, 11, clean temperefure which should be liwenty five out clccr, 12, inrnuc (10613 13, ash pit door; limiclrcd clegrcee Fahrenheitcr :1 lilllc more I l5, arch skew back bricks, 16 i y the construction of 'tliisfurnncc which 8;; 01' l e \-:itlxilrmval cf watec tubes 3, will be about five limes the temperance of 17, steam ex" ,llqlining bricks for cnrl casthe crimping gases: from the uptake which 9c mg, l9, (lead air space 20, cast iron or steel difference will give a boiler cfliciency cf ii casing, 21, p-arfiiiicn between (lead air space 'lit'ijle over per cent. The waicr is kept and nsbeslos covering, saddles, 23, sad- V on the heating surface of this boiler by the zllc tie roclrs, 2' 2 adjustable draft baffles, 2 CiICfllfltlQfi, which is caused by the healed lr: it cxi''s 26 recesses in tube holes of upgases entering ihe center of each scclimx .5 per (ll-um. which causes the water to circulalc npwzinl 5 (FmwmZ flmnrz'pz-icw.llp;)e1drumlwhicli through all cf the center tubes cf each inc water and steam drum and lower tion and dc'wn in the tubes at the mls of drums 2 W1 'cli arc Weller and mud drums each seclicn, which causes a very rapid arc cccncclecl by wclcr tubes 3, forming ircc'lal'icn 21ml it is impcs'sible to drive llic 1:)

ions, each seciiion having a Wuler oil llic heating 'surfacc in sonic 1 0nd at or near lire lop cf cllier cor; "curious and the steam (alien cling four pcinls of draft ic cut cf upper (Lem cvcr wllcrc film Wale; l uplalrcs having acajnslablc returning *0 the lcwer (iii-um which a l ways insures dry steam. The lining bricks 18 in the end casings are secured in pockets cast (in the casings. Thesebricks are made with fifty per cent. saw dust in the clay when molded, which makes the bestv of n )n-conducting linings. I have found .this lining in conjunction with the dead air space and the asbestos covering with the high furnace temperature to be only warm on the outside asbestos. v

I protect both the upper drum and the lower druins from the heat of the furnace by a liningPma-de of two parts fire clay and one part ortland cement which hardens under heat and which I find is the only practical way of making a desirable lining in these positions. I boiler must be protected from the heat of the furnace as they have to. be made so thick from two to three inches according to the size of the boiler, to stand one thousand pounds or more pressure. Preferably. I would not build for less than six hundred pounds pressure. I prefer eleven hundred pounds as a working pressure'and I prefer to build my drums of asoft cast steel of not less than fifty thousand tensile strength and not less than ten per cent. elongation. On accountof the high pressure I cannot build my drums of steel plate riveted together, the usual form of construction. It

is also not easy to roll heavy plates to small diameters which I am necessarily confined to, a diameter of three feet being about my limit. I can take steel plate heated and pressed to a form to make my drum in two halves and weld them togetherbut I prefer a soft casting. I could use some alloys but I prefer soft steel casting.

I show holes 16 in top of upper drum 1 for taking tubes 3-in and out of the boiler. When made in this form the upper drum would be hexagon and I would close these holes with brass plugs screwed in, or plates and yokes or other means, or if I did not wish to use this construction I would screw a short nipple in the lower drum then run the remainder of the tube up in the upper drum put a couling on the nipple, screw the long length c own in said coupling and expand said long end of tube in upper drum as shown in Fig. 3. Ordinar expansion on a smooth surface would not 0 at this pressure. I would cutrecesses with a special 4 tool about onev sixty-fourth of an inch deep in the tube holes in the drum {about four of these recesses to each inch in thickness and expand the tube either by a roller expander or by having a slight taper and use a taper pin, which would be the proper way in very small boilers. In building this boiler inas small as-from fifty to one hundred H. P. I would make the drums in two h and bolt them together. Also in s. are from eighteen inches to three in l.

Of course the drums in this seems where the tubeswould be about one to two feetlong the tubes should only be half inch to three quarters of an inch in diameter and boilers from about four to six feet should be one inch to an inch and a quarter 111 chameter and from about six to ten feet they should be from inch and a quarter to inch and shelf in diameter and in boilers from about. ten-to sixteen feet in height they should be from inch and a half to two inches in diameter, this being tin-important factor to produce rapid circulation. If the tubes are too large in diameter for the length, the steam globules will rise throu h the water to the upper drum without producing any circulation, as the steam globules produce cir culation in this boiler on the same principle as the air globules do in lifting water in wells where the water is lifted by compressed air being admitted in a pipe below the water line.

Having described my invention what I claim as new and desire to secure by Letters 'Patent is:

p 1. A steam boiler comprising upper and lower drums connected by water tubes, all

of suitable material and of proper thickness to carry a working pressure of eleven hun dred ounds, all of the tube holes in the upper rum having four or more recesses whereby the tubes may be expanded in said recesses to be capable of standing said pres:

sure, the lower ends of said tubes secured to the lower drums, all necessary parts bein protected from the heat of the furnace'an the water tubes of pro or diameterfor their lengths, whereby per ect circulation isob tained by the application of beat, all sub stantially as set forth.

2. A steam boiler comprising upper and lower drums connected by water tubes, all

of suitable material and. of proper thickness to carry a workin ressure of eleven hundred pounds, all 0 t e tube holes in the "up-- per drum having four or more recesses,

whereby the tubes may be ex ended in said recesses to be capable of stun ing said was sure, the lower ends of said tubes secured to the lower drums, all necessary plartsbeing' protected from the heat of the mace and the water tubes of pro er diameter for their lengths, whereby or set circulation is obtained b the app ication of heat, and the water tu es'covered' on the outside by fire brick containing dead air space covered with asbestos and the ends of the furnace having a fire brick lining containing dead air space secured to a casing, said casing being covered with asbestos, said furnace containin a brick arch as shown, and '11 takes or dra t exits containing adjustable raft bafiies,'all substantially as shown and described and for the purpose set forth.

A steam boiler comprising upper and lower drums connected by water tubes, of

suitable material and proper thickness to carry a working pressure of eleven hundred pounds, the upper drum hexagon in form, all necessary parts being protected from the heat of the furnace, and the Water tubes of proper diameter for their lengths, whereby perfect circulation is obtained by the application of heat, all substantially as set forth.

Signed at New York in the county of New York and State of New York this 27th day 10 of March A. D. 1909.

E. B. EDGAR, .I. B .'EDGAR.. I

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