US564677A - Bradley woodhull - Google Patents

Description

' 2 Sheets-Sheet 1.

(No Model.)

B. WOODHULL. STOVE AND GRATB.

Patented July 28, 1896.

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2 Sheets-Sl1eet (No Model.)

B. WOODHULL.

STOVE AND GRATE.

No. 564,677. Patented July 28, 1896.

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UNITED STATES PATENT OFFICE. I

BRADLEY WOODHULL, OF'SGBANTON, PENNSYLVANIA, ASSIGNOR TO THE SCRANTON STOVE WORKS, SAME PLACE.

sTovE AND GRATE.

SPECIFICATION forming part-of Letters Patent No.'564,67'7,, dated July 28, 1896.

Application filed February 19, 1896. Serial No. 579,945. (No model.)

To all whom it may. concern.-

Be it known that I, BRADLEY WoonHULL, of Scranton, in the county of Lackawanna, State of Pennsylvania, have invented certain new and useful Improvements in Stoves and Grates and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in fire-boxes and grates, such as are designed for heating furnaces, stoves, &c., the invention relating more particularly, though not exclusively, to that class of grates employing gratesections, which rotate or oscillate on their longitudinal centers, so as to discharge clinkers, unburned portions of the fuel, and ashes with out requiring the same to pass through the interstices of the grate itself.

The invention consists in certain novel details of construction and combinations and arrangements of parts, all as will be now described, and pointed out particularly in the appended claims.

In the accompanying drawings, Figure 1 is a perspective view of a fire-box and grate constructed in accordance with my invention, the fire-brick section and grate-frame being shown separated from the fire-box proper and a portion of the wall of the fire-box broken away to show the internal arrangement of the parts. Figs. 2 and 3 are detail transverse sectional views looking toward opposite ends of the fire-pot. Fig. 4 is a longitudinal section.

Fig. 5 is a detail section taken longitudinally through the center of one of the grate-bars. Fig. 6 is a detail end elevation with the end plate removed in order to illustrate the manner of removing the grate-bars without disturbing the other portions of the setting, the front plate being shown at one side in perspective.

I Like letters of reference in the several figures indicate the same parts.

Thefire-box itself, lettered A in the accompanying drawings, may be of any desired or preferred pattern, and may be in part or whole formed by the walls of the stove or furnace in which it is desired to employ my present invention, and hence, while I have shown a simple rectangular fire-box, it will be understood that such shape is shown as a mat-' ter of convenience only.

On the inner side of the fire-box, atapproximately the level of the grate-bars, I provide bearing ribs or brackets a, which are adapted to support the edges of the grateframe B. This grate-frame B is preferably formed in solid halves, which have interlocking projections 19 on their meeting-arms, so as to hold the frame in its proper form, and at the points of meeting I provide supplemental supporting-brackets C O, projecting the one, C, from the rear end of the fire-box and the other, C, projecting from the front end of the fire-box.

The bracket C has its base connected with the fire-box at a point below the front plate opening, and said base at C is extended to form a shield or guard outside of which the gear-wheels for rotating the grate-sections are located, as will be presently explained.

The bracket 0, preferably, is cast integral with and forms a part of the end plate of the firebox, and on each side of this bracket this end plate is provided with a bridge-bearing plate D, in which the bearings for the journals d at the rear ends of the grate bars E are formed. These bridge-bearing plates, it will thus be seen, stand away from the end plate of the fire-box and consequently there is a circulation of air around them to prevent them from burning out, and there can be no accumulations of ashes or dust to prevent such circulation, any ashes or dust getting behind the bridge-bearing plates at once dropping through into the ash-pit.

At the front end of the fire-box the gratebars E are provided with the usual interrneshing gear-wheels c, said gear-wheels e lying outside of the bottom of the bracket 0 and end of the grate-frame, and beyond the gearwheels the grate-bars are provided with journals which take into bearings F in a bridge plate F formed or attached to the inner side I of the removable front plate G. One of these jounals extends away through the front plate G and is adapted for the reception of a handle or crank, by means of which the grates are oscillated or rotated to dump or shake the fire, and both the bearings on the face-plate G are formed in a bridge-plate, which stands away from the face-plate at the bottom to permit of a free circulation of air around the parts as well as to prevent the accumulation of ashes or dust in the bearings. This bridge-plate F may be cast separate from the face-plate and attached thereto by rivets or otherwise, if so desired, although I prefer to have it form a permanent portion of said face-plate.

Such construction, it will be seen, permits of the ready and convenient removal of the grate-bars without disturbing the grate-frame or firerbox otherwise than to simply remove the face or end plate G and draw the gratebars out at that end of the fire-box. Consequently it is entirely practical to arrange the usual water fronts or backs or their linings in the fire-box above the grate-frame, and while I have illustrated herein a simple rectangular fire-brick frame G which rests on and is supported by the grateframe, it will be understood that this section of fire-brick may be in part or whole displaced by a water fire back or front, and that the same may constitute a permanent part of the setting. I prefer that the fire-brick section should have a flange g seating outside of the flange g on the grateframe, while the inner face of the fire-brick overhangs the central opening in said frame, in order to prevent the burning out of the frame or the accumulations of ashes or dust therein.

As a convenient means for holding the front or end plate in position, I may employ bolts H, having countersunk heads or turn-buttons h, or any other approved form of fastening device which will permit of said plate being removed at will to allow of the removal or repair of the grate-bars.

The grate-bars themselves are of an ordinary pattern now on the market, and I do not deem a particular description of the same necessary or desirable, inasmuch as I do not desire to be limited to any particular style of grate-ban For convenience in casting the rear end of the fire-box with" the bridge-plate bearings thereon, I may form a separate central section I in said end, which section may be secured in place by rivets or otherwise prior to the setting up of the fire-box, thus forming a closed end to the fire-box when this is desired.

Having thus described my invention, what I claim as new is l. The combination with the fire-box having the opening in one end, and the inwardlyprojecting brackets rigidly connected with said fire-box, one of said brackets extending up in line with the opening, of the grate-frame supported on said brackets, a removable section closing the opening in the fire-box and the grate supported in bearings beneath the grateframe and in position to be withdrawn through the opening in the fire-box without disturbing the grate-frame or the fire-box lining overlying the grate-frame; substantially as described. 7

2. The combination with the fire-box having the opening in one end thereof and the brackets rigidly connected with said fire-box at the ends and projecting inwardly, of the grate-frame supported on said brackets, the pivoted gratesections mounted in bearings in the fire-box, intermeshing gears connecting said grate-sections located outside of the bracket at the end of the fire-box adjacent the opening and a removable section for closing said opening; substantially as described.

3. The combination with the fire-box having the grate-frame-supporting ribs on its front and rear and the inwardly-projecting brackets at opposite ends, of the sectional grateframe supported by said ribs and brackets; the fire-box lining overlying the grate-frame and the sectional grate supported in bearings below the grate-frame on opposite sides of the brackets; substantially as described.

4. The combination with the fire-box having the inwardly-proj ecting grate-frame-supporting bracket formed with the wide base, and the grate-frame supported bysaid bracket, of the oscillatory grate formed of grate-bars located at opposite sides of the bracket and having intermeshing cog-wheels, said cog-wheels lying outside of the wide base of the supporting-bracket for the grate-frame substantially as described. 5. The combin ationwith the fire-box having the inwardly-proj ecting grate-frame-supporting bracket provided with a relatively wide base and the grate-frame supported by said bracket, of the oscillatory grate-bars, co wheels located thereon and lying outside of the base of the bracket, and a removable section in the fire-box having the journals for the ends of the grate-bars located outside of the grate-frame-supporting bracket, whereby said section may be removed and the gratebars withdrawn without disturbing the grateframe and fire-box lining; substantially as described.

' 6. In a setting, such as described, the combination with the oscillatory grate, of the firebox having the bearing bridgeplates formed thereon within the'wall of the fire-pot and having openings at top and bottom for the circulation of air around the journals of the grate; substantially as described.

7. The combination with the fire-box having the bridge-plate on its inner side with openings at top and bottom of the same for the circulation of air between said bridge-plate and wall of the fire-box and bearings formed in said bridge-plate, of the oscillatory gratebars having journals working in said bearings, the grate-frame and the fire-box lining lying within said bridge-plate; substantially as described.

. anvil 8. The eombinationwith the fire-boxhaving formed in said bridge-plate; substantially as the bearings for the oscfllatory grate-bars described. formed in one end thereof, of the removable section for closing the opposite end of said BRADLEY WOODHULL' 5 fire-box having the bridge-plate on its inner WVitnesses: side With an air-space behind the same and JOHN TAYLOR,

bearings for the outer ends of the grate-bars J. A. LANSING.

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