US486018A

US486018A - Fire-box

Info

Publication number: US486018A
Authority: US
Publication date: 1892-11-08
Anticipated expiration: 1909-11-08

Description

(No Model.)

P. H. BAILEY.

PIRE BOX.

No. 486,018. Patented Nov. 8, 1892.

m a D Q NI l i T l/mSSe/S Vi lwevziolf K F. w78 fladey' 8 am vzwombys 'UNTTED STATES PATENT @Trina FRANK H. BAILEY, OF lVILKES-BARR, PENNSYLVANIA.`

FIRE-BOX.

SPECIFICATION forming part of Letters Patent No. 486,018, dated November 8, 1892.

Application tiled February 12, 1892. Serial No. 421,255. (No model.)

To all whom it may concern,.-

yBe it'known that I, FRANK H. BAILEY, a citizen of the United States, and a resident of Vilkes-Barr, Luzerne county, Pennsylvania, have invented certain Improvements in Fire- Boxes, of which the following is a specification.

My invention relates to fire-boxes for boilers or heating-furnaces of any kind, its main object` being to automatically regulate the amount of fuel exposed to combustion, as more `fully set forth hereinafter.

In the accompanying drawings, Figure 1 is a sectional view on the line 1 2, Fig. 2, of a fire-box constructed in accordance with my invention; and Fig. 2 is a face View of the same partially in section.

The boiler A, Fig. 1, is constructed in any suitable manner, the form illustrated being one in which a series of vertical tubes connect upper and lower communicating headers. The fire-box B is inclosed by vertical grate-bars C, preferably covered with nonconducting material c, preferably asbestus, and being, if desired, hollow and communicating at the upper and lower ends with headers D in communication with the main body of the boiler, so that there will be a circulation of water and steam through the gratebars, although this is not essential to prevent the burning or destruction of the grate-bars, inasmuch as said grate-bars are covered by the non-conductin g material c, although if the non-conducting material be dispensed with the grate-bars may very properly form a part of the boiler.

The grate-bars are protected on either side and in front and rear by covering-plates E E, the covering-plates E on the front and rear extending from the top down to about the low-water line in the boiler, (which is represented at cc x in Fig. 1,) and the amount of fuel in the fire-box exposed to the draft is governed-by vertically-adjustable plates F F, situated at the front and rear of the fire-box, as illustrated, or at the front or at the rear alone, as desired, the higher the adjustment of the plates the greaterthe amount of fuel exposed to the draft.

The plates or doors F F are counterbalanced by a weight G, connected by chains g, passing over pulleys h, to the doors, and by moving the Weights by hand or mechanically, or by having handles on the doors, they may be raised or lowered to expose a greater or less amount of fuel. I prefer, however, to provide for this adjustment automatically by connecting the chains to a lever t' under the control of a diaphragm in a pressure-chamber I, connected bya pipe 7c to the steam-space of the boiler, so that as the pressure of steam varies the doors F will be opened to a greater or less extent, as required.

The fuel is introduced into a hopper L and the combustion-chamber is preferably kept filled with fuel, the clinkers being ground up and the residue discharged at the bottom of the fire-box by means of one or more suitablyshaped grate-bars m. Under a forced draft the frontof the tire-box is inclosed by a casing N, and the amount of air admitted is governed automatically by a valve attached by a chain a to one end of the lever t', or, as shown in Fig. 2, a natural draft may also be regulated by connecting the valveV of the casing N to such lever t'. It will thus be seen that as the steam-pressure falls the doors F will be raised and a greater or less amount of fuel exposed to the draft and consumed. The fuel above the edge of the door, being inclosed and not mingling with the oxygen, is gradually fed down as the residue is discharged by the rotating grate-bars m.

Having thus described my invention, I claim and desire to secure by Letters Patent- 1. A fire-box for boilers, comprising a series of Vertical grate-bars partially inclosed and adjustable gates or doors for exposinga greater or less amount of fuel in the lire-box.

2. The combination, in a lire-box, of a series of vertical grate-bars, a casing partially inclosed in the same, and vertically-adjustable doors for exposing a greater or less amount of fuel, substantially as specied.

3. The combination,in the fire-box, of a series of vertical grate-bars, a casing partially inclosed in the same, vertically-adjustable doors for exposing a greater or less amount of fuel, and a pressure-chamber connected to IOO the steam-space ofthe boiler and having a dia.- In testmon y whereof I have signed my lo phragrn operatively connected to said doors, I name to this specification in the presence of substantially as specified. two subscribing Witnesses.

4L. The combination, in the lire-box, of the vertical grate-bars, a non-conducting covering FRANK H. BAILEY. for said grate-bars, adjustable doors for regulating the amount of fuel exposed, and a grate Witnessesz bar or bars at the bottom of the reboX,sub GEORGE T. KIRKENDALL, stantially as specified. THOS. H. ATHERTON.