US498384A - Steam-boiler - Google Patents

Description

2 Sheets-:Sheet 2.

no Model.)

STEAM BOILER.

No. 498,384. Patented May 30,1893.

Qiiw five/226 m: NORRIS PETERS c0 vHOTo-umov, WASHINGTON. a. (2.,

NITED- STATES ELLIS F. EDGAR, OF IVOODBRIDGE, NEW JERSEY.

STEAM- BOILER.

SPECIFICATION forming part of Letters latent No. 498,384, dated May 30, 1893.

' Application filed July 16, 1892.

Serial No. 440,227. (No model.)

To all whom it may concern:

zen of the United States of America, and a resident of Woodbridge, in the county of Midsaid invention.

dlesex and State of New Jersey, have in vented certain newrand useful Improvements in Steam-Boilers, of which the following is a specification, reference being had to the accompanying drawings, forming part ofthisl specification, in which 1 Figure'l, is a vertical cross sectional view of an upright boiler containing certain features of my invention; and, Fig. 2, is a simi-.

lar view of the upper part of an upright boiler especially illustrating a .further feature of s, is the interior shell of the boiler, .11. exterior shell, P, the priming and c, the circulation plate, F, the fire box,A, the ash pit,"

G, the grate, Dthe'door, O, 'the crown sheet, E, the draft exit, R, the return tube, W, the heat accumulator wall,- W, the protecting wall, J, the tube jacket, t, the connecting tubes, 19, the bolts, and'O, the steam space.

In Fig. 2, the wall W, is omitted, c, is extended up to the level of and partially across the crown sheet and instead of a priming plate P, a modified one P, is employed. Its office and arrangement however are substantially the same, that is, it prevents the water which risesup between the interior shell and the circulation plate from being ejected upward into the steam space, but deflects it and the exterior shell whereby the circulation is assisted.

The operation is as follows: The boiler being filled in the case of Fig. 1, to a little below the upper edge of plate 0, and in the case of Fig. 2, toabout the level of the upper end of tube R, fire is kindled upon the grate. The draft is first upward and outward toward the edges of wall W, which is usually made of fire brick, and between said edges and the interior shell of the boiler, as plainly shown by the arrows, the space being usually in area about equal to the area of the draft exit. but little does pass) and the gases would impinge upon the crown sheet and unduly heat it were it not protected in some manner. In

On passing this wall the flame (though also usually of fire brick, which fully accomplishes the desired object. I

In Fig. 2, I- extend the circulation plate up andpartially overthe crownsheet and theretheir course pass back through tube R, and.-

E, and thev final result'is economy of fuel. Not only this, but the water in the jacket about R, of itself becomes heated as highly.

passing out at the top through the upper tubes 25, .in tothe space beyond plate 0, and. a more free and} rapid'circulation is insured while the jacket prevents the burning out ofthe walls of tube R. c v

The boiler is free. from the objections attendantupon the use of a multitude of small tubes, and having a large free fire box, is a rapid and easy steamer which nevertheless exhausts the heat from the fuel before-the gases pass beyond their'workingperiod.

I prefer to always use the plate W,as it and the tube R, are mutually supporting, and it is of great valuein increasing the power of the'boiler,bu't the tube R, could be supported ment shown could readily be in a horizontal boiler.

'What I- claim, and desire to secure by Letters Patent, is-- 1. A steam boiler having an interior'shell, an exterior shell, a crown sheet, a circulation plate intermediate the interior and exterior shell, extendingv up to the level of and partially over thecrown sheet but having an opening in it above the crown sheet and a p'riming plate located above and extending beyond said opening in the circulation plate, the space between the circulationand priming platesbeingas wide or wider than the space between theinterior shell and the circulation plate, all substantially as set forth.

2. A steam boiler provided with a return -tube leading from the farther end of the fire adapted'for use I Fig. 1, this is accomplished by the wall W,

asthat within plate 0, and alsorises, rapidlyin other ways, and furthermore the arrangeby cause the rising water to cover the crown sheet and thus prevent its heating toan undesirable temperature. The gases then in I c'o 6'0 o'ut'at exitvE, They were to a great degree 1 exhausted of heat by the. time they passed wall W, but wh at little'was left would be fully utilized before the gases reached exit box back through said firebox and into the draft exit and a wall of incombnstible mate rial capable of being highly heated located at or near the farther end of the return tube with a space at its edges, between said edges and the interior shell of the boiler, but otherwise substantially closing the space between the return tube and the wall of the fire box, all substantially as set forth.

In testimony that I claim the foregoing as 10 my invention I have signed my name, in presence of two witnesses, this 11th day of July, 1892.

E. F. EDGAR.-

Witnesses:

A. G. N. VERMILYA, F. ROWLAND.

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