US655086A - Rotary grate. - Google Patents

Description

Patented .Iuly 3|, |900. H. H. HUNTER.

ROTARY GBATE. (Application led Dec. l1, 1899.) (No nodal.)

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Nrrnn STATES i ATENT innen ROTARY G RATE.

SPECIFICATION forming part of Letters Patent No. 655,086, dated July 31, 1900.

Application led December 11,1899. Serial No. 7391956. (No model') To @ZZ whom t may concern.'

Be it known that I, HENRY H. HUN'rnma citizen of the United States, residing atBerkeley Springs, in the county of Morgan and State of West Virginia, have invented new and useful Improvements in Rotary Grates, of which the following is a specication.

My invention relatesto rotary grates for stoves, the object of the same being to provide means whereby comminuted particles or fine grades of anthracite coal may be burned satisfactorily and the heat thereof utilized. It is a well-known fact that the finer the grade of the coal the greater the draft that is necessary in order to eectually `consume the same. ings therethrough are of large enough size to furnish sufficient draft they are too largeto support the fine particles ofcoal. The result is that lthese fine grades of coal cannot be satisfactorily burned, because in the one case there is insufficient draft and in the other case there is a danger that the bed of coals will fall entirely through the grate ,into thejashpan without being consumed. One of the methods which has been devised vfor overcoming this objection is to cover the grate, which is provided with openings of sufficient size,

with large coal and introduce the smaller grade of coal onto the top of this large coal. It has been found, however, that even when this has been done the small 4coal will fall down into the grate as soon as the large coal,

which originally bridged across these jcpenings, has burned out. f

By my invention I provide means whereby the size of the openings through the grate mayy and Fig. 3 is a bottom plan view showing the grate-sections in different relative positions.

With the ordinary grates if the openstrengthening ribs 7.

.ferred to.

radially-extending ribs l2 13.

Like reference-numerals indicate like parts vided with a large central circular opening 2. l In this opening fits and is adapted to move my improvedrotary grate. The same consists of two annular members 3 and 4, re-

spectively, the lower member 3 being supported with provision for rotary movement upon inwardly-extending lugs or projections 5 5.. It is also provided with a series of radially-extending elongated slots 6 6, between which are secured the depending bracing and On' one side the sec.- tion 3 has secured to or formed integral with ita laterally-projecting arm 8, which consti- Atutes a handle and lies wit-hin a recess or cutaway portion 9 in the uppersurface of the partition 1. The other annular section 4 of my improved grate is disposed upon the upper side of the section 3, in close contact therewith, and is provided with a laterally-extending arm or handle 10, whiehalso fits and moves within the recess or cut-away portion 9, heretofore rewith `a series of radially-extending elongated slots 1l 11, which are adapted to register with the slots 6 6 in the section 3 when the handles 8 and 10 of the two sections are in alinement one with the other. Between the slots l1 and secured to the upper side of the section4are The ribs 12 have their upper surfaces parallel with the upper surface of the section 4 and are arranged alternately between the ribs 13. The latter ribs are formed with upwardly-extending curved projections 14 thereon, the proj ections on the alternate ribs 13 being formed on opposite ends thereof-that is, the projection 14 on one of the ribs 13 will be located at the inner end thereof and on the adjacent rib 13 will be on the outer end thereof, Secured to the section 4 of the grate and extending upwardly therefrom is a hollow substantially cone-shaped dome 15, provided with a series of elongated slots 16 at its lower end, arranged opposite the spaces between the slots 11 in the section 4. Said section 4 is held in place with provision for rotary movement by means of a central axial rod 17, se

The section 4is further providedV IOC foru'se with coal of dierent fineness. Vil/'hen the handles 8 and lO-of the two sections are in line with each other, the slots lland 6 register one with the other, Vand the draft, evenly divided throughout the entire surface'ot the grate, is supplied' to the fuel through the slots t 6 and 11Y and also through the slots 16 in the `cone-.shaped dome l5. The draft'through the E I' slots 16 is always unobstructed, so that nog ymatter what the relative positions ofthe seci tions 3 and 4 may be a draft to support the combustion is supplied.y In starting a? fire; -with culm or finely-divided particles of coal `itis-found desirable to move the 'sections 3f -and 4 of the grate so that the slots or pas-r sages therethrough are completely closed,and the entire draft is then supplied through the slots 16. When it is desired to shake the grate., the handles 8 andlO are grasped by the hand and both sections Sand 4 rocked simultaneously The peculiar shape and arrangement of] the ribs 12-and 13, with the projecftions'14 on the latter, serve to remove or "breakup any clinkers that may be upon the upper-surface of the section 4 and cause the same to pass down through the passages ini the grate into theash-pan below. They also `serve to generally change the position of vthe fuel. 'By' reason of the fact, as stated above, that Vthe dome 15 is secured to the upper section 4 of the grate it willfbe observed that the ro- Y Tl. A grate comprising two rotary sections mounted one upon the other and provided with slots .adapted to register one with the@ other, and a substantially cone-shaped dome i secured tothe upper of saidsections and pro- `I claim, and desire to secure by Letters Patvided with a series of slots 'in the sidesthereof for the passage ofair above said sections.

2. A grate comprising two rotary sections `disposed one upon the'other and'provided with elongated slotswadaptedY to .register with each other, a substantially cone-shaped dome on the upperv of said sections, provided with a series of slots or passages for supplying air Yabove said'se'ctions, and means for moving said sections independently for controlling the size of thepassages through saidslots.

-5 Agrate comprising two annular'rotary sections disposed one upon the other, and

' provided with elongated slots adapted'to reg- :thesize of the passages therethrough.

4. The combination withv a diaphragm or partition having a central circular opening therein, of a vgrate comprising two annular sections disposed one upon the other, tting Yand adapted to rotatein said opening and provided with radi'ally-extendin g slots adapted to yregister wi-theach other, laterally-extending arms on each of said sections consti- 'tuting handles therefor, by means of`which said sections may be rotated simultaneously or moved independently, and a hollow substantially cone-shaped dome Vsecured tothe upper of said sections and provided with a series of slots or openings in the sides thereof for the supply of air above said sections.

5. In a grate, two annular sections disposed one upon the other and provided with slots i adapted to register with each other, `a sub- `st-antially cone-shaped dome secured to the upper of said sections andlprovided with a ser-ies of slots or openings for supplying-air above said sections, and radially-extending ribs 12, 13 secured to the top surface of the upper of said sections between the slots therein, the ribs'l2 having their`upper surfaces parallel with thesection to which they are secured and arranged alternately between the ribs 13, and the lattery having upwardly-extending curved projections 14 arranged alternately at opposite ends of said ribs 13.

In testimony whereof I have hereunto set my hand in presence of two lsubscribing witnesses. v

HENRY H. HUNTER.

Witnesses: Y

CHAs H. SnocKEY,

JAS. F. SMITH. Y

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