US82023A - Clark d - Google Patents

Description

No. 82,023, PATBNTED SEN-8, 1868.

C. D. PAGE.

LIMEKILN.

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CLARK D. PAGE, OIF ROCHESTER, NEW, YORK.

Letters Patent No. 82,023, dated September 8, 1868.

IMPROVED LIME-KILN.

dlgs Stimuli rifrtch in in tiges itlers zxmt mit mating putt nf the atmet,

TO ALL WHOM IT MAY CONCERN:

Be it known that I, CLARK D PAGE,`of Rochester, inthe county of Monroe, and State of New York, have. invented a certain new and useful Improvement in Lime-Kilns; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification.

Figure 1 is an elevation.V

Figure 2, a plan.

Figure 3, a central vertical section.

Figure 4, a cross-section in plane of line :c fig. 3.

-Like letters of reference indicate .corresponding parts in all the figures.. i

This invention relates to the employment of stay-pieces to brace the kiln, with air-dues to keep them from burning; to the-employment ot shielded poke-holes at the top of th'ekln for shaking down the stove, and the construction and arrangement ofo the furnace and grate-bars, all as hereinafter described. l

In the drawings, A indicates the kiln, constructed of stone, as usual. In the sides are built strips a a a a, of plank, overlapping each other at the corners, as shown, and suitably secured together. Inside each stripis made an air-flue, b, extending longitudinally the whole length, and openingout so as to allow a free passage of air froni end to end.

These strips serve as binders to the stack, to prevent rupture and displacement. Being made of wood, they yield, to adapt themselves to the expansion and contraction of the stack under different temperatures, which would not be the case were they made of iron or other inexiblematerial. The ues serve simply to secure a passage of cold air inside -the binders, which keeps them cool, and thus eifectually prevents either burning out or deadeningof the wood. This combination of wooden binders with inside air-ilucs is necessary to secure elasticity and durability.

The hopper B is subjected to considerable strain, and is surrounded by heavy timber binders a a a.' a', similar to a a, except that as but little heat comes so high, the air-dues 'are not employed The hopper is made of the usual 'aring form. Opposite the corners are made poke-holes c c c c, just backof the hopper, the wall d ofwhicli iuclines or shields the holes so as to isolate or shut them oi from the hopper. 'These holes open inward at the proper distance down, as indicated most clearly in iig. 3.

VThe great advantage of these poke-holes is, that they open downward, in the direction of the cupola, so that the thrust will be longitudinal, thus always loosening and dislodging the rock; and, at the same time being shielded or cut oii' from the body of the hopper, there is no impediment to the free action of the poker, as there would be if the holes were dispensed with and the poker simply run down in the hopper itself.V In silcli.case the impediment would be so great that thepoker could not easily reach that point where there is the greatest difficulty from clogging, and just the place where my poke-holes open into the hopper. These poke-holes also allow a free shaking motion of the poker to loosen the rock. i

1 The ordinary lateral poke-liolesc c are also employed.

VI construct my furnace-arches with flaring sidesff, and with loose grate-bars g g, which may be removed separately from ppl-acc. At the sides of the grate-bars arc made vertical side-passages l. h, for the free entrance of air at the sides of the furnace, as well as up through the grates. These side-passagesvare of much importance, for the tendency of the fire is to concentrate in the centre of the `furnace, vvhere the greatest amount of fuel is, and-where the greatest amount of the air comes. vThese passages admit 'a heavy body of all .i the "sides, and thus serve to equalize the burning, and produce a more perfect combustion; These passages also `catch the air, and, in carryingit up in a series of equalizellcurrents the wholeextent of fthe furnace, retain 1t from concentrating at on'ce in a body atthe inner or further end of the furnace, as wherethepwalls aresmooth and unbroken. These passages, by breaking the smoothness o-f the wall, and by -furnishing'air inside thegeneral surface, eifectually pre-vent clinkering.

The grate-bars stand in an inclined position, as shown infiig. 3. Their-inner ends rest in a iixefhbctchd bar, a', and do not quite touch the inner wall'of 'the furnace, so that they are enabled to shake freely there, and avoid burning ont by not resting o n a shoulder. Their outer central portions rest on a xed bar, r, that extends through from side to side of the stack, and thus serves as a binder; and the extreme outer ends rest on anotched bar, i', pivoted at 1,' so asto turn up or down, and held4 up by a pin, m, or equivalent, when in use. This bar is simply for retaining the grates from lateral displacement. 'i I When the bars are to be shaken, the hinged bar z'/ is lowered, as in red lines, g.|1, which leaves the grates resting intermediately on bar k, which serves as a fulcrum; and the leverage but slightly preponderating in one direction, `they are easily shaken. The rbar k being smooth, and the inner ends of the gratos being free, as before described, allows a frealateral action, which is most eective in` removing clnkers. The leverage also allows the grates tobe raised vertically, as in red lines, iig. 3. These advantages are too apparent to require further description. l

y In the bottom of the ash-pits are situated panspp, forl holding water` These pits have an outward incline from-the grate downward, as shown at q, and their bottom is sunk at some distance below the level of the outer entrance or door, as shown at r.- This construction` holds the water and ashes at such a depth as not to b eaifectedby the incoming draught, and at the same timefthe incline q carries the air up in'an unbroken body #t3 the inner lend o f the furnace, bathing the whole inner ends of the grates, so that they cannot easily burn out. I The top of the cupola proper is made somewhat flaring upward, as shown vats; Aand above this the hopper B is made withI a-st'ill greater outwarduangle, as shown at t. These two angles f 'orm an `enlarged mouth at the top of the cupola, in which the raw stone is placed preparatory ,to' goingv'downintothe'kiln. This stone becomes gradually heated, and attains its maximum of expansion before it enters the narrow passage. This expansion,

from Athelarhg ,shape of the mouth, acts outwardly and upwardly, withoutin, any degree 'straining"up ,on theA walls. I thus obviate a great diiculty experienced in ordinary kilns,'from the .swelling ofthe stonel inside. This enlarged form of the mouth also facilitates the entrance of the stone. i

What I claim as m'y invention, and desire to secure by Letters Patent,l is 1. The combination and arrangement, with 'the grate-bars g'g, of the cross-bars k'z', the rst being fixed, and forming a fulcrum for the leverage 'of the grate-bars in shaking, and the latter beinghinged, so as to turn up and down to secure the grates, or allow them to be shaken, as herein set forth.

2. The lues b, constructed as described, next to the inner edge of the wooden binders a of the kiln, to operate inthe manner and for the purpose substantially as described.. f Y

In witness whereof, I have, hereunto signed my name in the presence of two' subscribing witnesses.

v 'i C. D. PAGE.

Witnesses:

R. P..,OSG}00D, t W. J. CREELMAN.

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