US111223A - Improvement in grate-bars - Google Patents

Description

J. T. MARSHALL. Furnace Grate-Bar.

Patented Jan. 24, 187].

Tfi'irzesses:

N.PETERS, PHQTO-LITHOGRAPHER. WASHINGTON. a. C.

autism am cm .JOS'EPH T. ARSHALL, or WILMINGTON," DELAWARE.

Letters Patent No. 111,223,,"aaea January24, 1871,

IMPROVEMENT lN GRATE-BARS.

The Schedule referred to in these Lettei-B'Patent and making'parl; of the name.

Be it known that I, JOSEPH T. MARSHALL, have invented a certain new and useful improvement in Grate-Bars, which I velilyfbelieve was never} before known or used priorto my invention thereof.-

.The nature of my invention consists in grate-bais made and constructed forthe purpose First, of equalizing the draught by means of remov A represents a frame inwhich the grate-bars are 'journaled at the front and back end, as shown at b b.

The grate-bars'are of a pentagonal form, and the sides of the pentagon are concave. The barsare put in in such manner that the edge of one bar will always be in the center of the concave of the other bar, thereby thoroughly clearing eaclrother, and

allowing no refuse or ashes or clinkers to lodge and remain between them, thereby obstructing the draught.

Upon the front ends of .thebars, on the outside of the frame, Iarrangethe gear or cog-wheels O 0, when, by applying a proper crank on the square ends D D of the bars, they may be revolved partly or wholly, agitating the fire, as desired. By means of the gear- Fignre 1 represents a cross-section of my improved .ing they may be operated simultaneously, or, if pre-'- ferred,tbe gear-wheels may be left off alternately, and the bars thus work iii-pairs.

-In case. any one of the-bars becomes worn or burnt out, itlmay be removed and replaced by a new one,

the rest of the bars still remaining intact.

Instead of being pentagonal the bars maybe of any nnmberjof sides, the same being concave, always insuringthe object of my invention, viz: that the poiut" or edge'of one bar shall come opposite to andcnt out of the concave side of the next bar any residuum, such as cliukers,"&c., thus leaving no possible cbancefor my grate to clog, and always producing a good draught. 'Having thus" described my invention, r. What claim asn'ew, and desire to secure by-Letters Patent, is a Y K I I 1. Aseries of revolving grate-bars, with any num-,

ber of concave sides, constructed for the"purposes.

herein shown'and setffortln I 2. The combination of theframe A with the pentagonalor 'niany-s'idedconcave bars B, geared by wheels 0 and ends D,-all constructed and arranged substantially as herein shown, andfor, the purposes set forth. o v

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

JOSEPH T. MARSHALL. Witnesses:

CHAS. G. FISHER, J A0013 W. SATTERTHWAIT.

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