US192059A - Improvement in kilns for baking emery-wheels - Google Patents

Description

UNITED STATES WILLIAM ESTY, 0F FITCHBURGfASSIGNOR Tt) VITRIFIED WHEEL AND EMERY COMPANY, OF ASHLAND, MASSACHUSETTS.

l IMPROVEMENT-'IN KILNS FOR BAKING EMIRVWHEELS.

Specification forming part of Letters Patent'No. 192,059, dated June 19, 1877; 'application tiled January 9, 1877.

To aLL'fw/Lom it may concern Be it known that I, WILLIAM EsTY, of Fitchburg, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Kilns for BakingEmery-Wheels, and for other purposes, of which the following, taken in connection with the accompanyingdrawings, is a specication.

My invention relates to a kiln or furnace for baking emery-wheels or other artificial stone,

and has for its object a more even distribution or application of heat to all parts of the stone than has heretofore been accomplished; and it consists in the use, in a chamber contiguous to the fire-box of the furnace or kiln, and through which the hot gases and other products of combustion have to pass from the fire-box to the chimney, of one or more circular platforms or disks embedded in the rebrick licor of said chamber, uponwhich the molded stones to bel baked, inclosed in seggars composed of fire-clay, are placed, said platforms being adapted to be automatically rotated about a vertical axis, so that every part of the periphery of the stone is succes ively presented to the hottest part of the re.

My invention further consists in `forming upon the under side of said rotary platforms `or disks an annular rib projecting down.

ward therefrom, in combination with an annular groove or trough filled with sand, powdered soapstone, or equivalent material, in which said annular rib revolves, as a means of packing said disks, to prevent air from entering the furnace, except through the fire.

My invention further consists in the combination with a kiln or furnace of one or more disks, sunk in recessesin the tloor of the combustion-chamber, and mounted upon vertical shafts of one or more ratchet-wheels, one or more reciprocating-bars carrying one or more pawls adapted to engage with said ratchet.

wheels, and a lever adapted to impart reciprocating motion to said bars as will be described.

Figure 1 of the drawings is a front elevation of my improved kiln. Fig. 2 is a vertical section on line 'u c on Fig. 1. Fig. 3 is a hori- -volving disks.

zontal section on line :vx on Figs. 1 and 4. Fig. 4 is a vertical section on line y 3/ on Fig. 3. Fig. 5 is a horizontal section on line z z on Fig. 4, and Fig 6 is ani enlarged partial secj tion, showing the method of packing the re- AA A A are four fire-boxes provided with suitable grates a a, and B B B B are the ashpits, each to be provided with suitable doors, (not shown.) G G are the bridge-walls between the lire-boxes A A, and the combustionchamber or oven D, in the center of which opens the descending flue b, communicating with the horizontal flue c, leading to the chimney E.

The floor of the chamber D, made of tirebrick, has formed in it one or more sunken recesses or openings, F, circular in form, in the bottom of each of which is formed an annular groove or trough, d, which may be formed in the fire-brick, or the bottom of the recess may be made of metal, and the inner wall of the annular groove d be formed by a raised rib cast on said bottom plate, as shown in Figs. 4 and 6.

Within the recess F is placed a circular metal disk, G, mounted upon the upper end of 4the vertical shaft c, and provided with the downwardly projecting annular rib g, the lower edge of which extends nearly to the bottom of the trough d, as shown in Figs. 4 and 6. The trough d is nearly lled with dry sand, powdered soapstone, or equivalent ma terial, packed closely around the rib g, which revolves therein, thereby packing the joint and preventing air from entering the oven or chamber D around said disks.

The shafts -e are mounted in suitable bearings, and have each secured firmly thereon a ratchet-wheel, h, located in the chambers H below the floor of the chamber D.

I is a three-armed lever pivoted at z, and engaging by its two opposite arms with the two long bars or rods j, and adapted to impart thereto a reciprocating motion in opposite directions, and through the pawls k k secured to said bars engaging with the ratchetwheels h impart an intermittent rotary motion to the disks ,Gr.-

In practice the disks G will be located with their upper surfaces somewhat'below the level of the oor of the chamber D, and will have their upper surfaces protected from the great heat of the furnace, by being covered with a circular disk of tire-brick l, as shown at the left-hand side of Fig. 4,. and in Fig. 6. Jis a door opening into the chamber D, through which the stones to be Vbaked may be placed in positionon the disks G.

What I claim as ncw,.and desire to secure by Letters Patent of the United States, is-

1. In combination with the combustioncham ber of a furnace or kiln, one or more circular disks or platforms sunk in suitablerecesses formed for the purpose in the floor of said combustion-chamber, and adapted to be automatically rotated about a vertical axis, substantially as and for the purpose described.

2. In combination with the combustion-chamber of a furnace or kiln the disk G, provided with the.downwardly-projecting annular rib y, .the .annulantrough (Land, a packingodry sand, powdered soapstone, or other granulated material nearly filling the trough d, and surrounding the lower edge of the rib g, substantially as and for the purposes described.

3. The l combination with the combustionchamber of a furnace vor Vkiln vvoffone or more ldisks Gr, mounteduponlyertical shafts, one or more ratchet-wheels h, one or more recipro- .eatingbars oneor morevpawls k, and 'a single operating-lever, Lallarranged and co-operating, as set forth, to impart an intermittent rotary motion to any object placed upon said disks, substantialli;1 as and for the purposes described.

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