US962805A - Grate-bar. - Google Patents

Description

Patented June 28,1910.

ZNVENTOR A. WILDBRSPIN.

GRATE BAR.

APPLIOATION FILEDMAR.17, 1910.

WITNESSES I l N TED ANDERSON WILDERSPIN, OF GRAND SALINE, TEXAS, ASSIGNOR OF ONE-HALF TO DAVID C. EARNEST, OF DALLAS, TEXAS.

GRATE-BAR.

Specification of Letters Patent.

Patented June 28, 1910.

Application filed March-17, 1910. Serial No. 549,942.

To all whom it may concern.-

Be it known that I, ANDERSON WILDER- SPIN, a citizen of the United States of America, and a resident of Grand Saline, in the county of Van Zandt, in the State of Texas, have invented certain new and useful Improvements in Grate-Bars, whereof the following is a specification.

This invention relates to a furnace grate bar especially adapted for a grate for burning fine fuel such as slack lignite in steam boiler or other furnaces, either with a natural, a forced or an induced draft. These grate bars may also be used to advantage in burning lump lignite and other fuel.

The principal objects of the inventionare to secure a thorough distribution of air to the fuel on the grate and the retention thereon after a rake off of sufficient incandescent fuel to ignite a fresh supply of fuel.

Figure 1 of the accompanying drawings represents an enlarged transverse section on line 1 1 of Fig. 2 of a grate bar embodying the principal features of this invention. Fig. 2 represents a top plan View thereof, a part being broken out. Fig. 3 represents a bottom plan view of a fragment thereof. Fig. 4 represents a perspective view of a fragment thereof provided with ventilating holes extending through the partitions and with ventilating channels in its sides. Fig. 5 represents a transverse section of a portion of a grate comprising a series of grate bars embodying the principal features of this invention. Fig. 6 represents a longitudinal section of a fragment of one end of one of the grate bars and its furnace support.

The same reference numbers indicate cor responding parts in all the figures.

This bar in its general outline is like the ordinary grate bar commonly used in boiler furnaces being approximately rectangular in cross section, wider at top than bottom, and provided at its opposite ends with flanges 11 and 12 or other suitable projec tions for engaging supporting means.

A. grate bar embodying the preferred form of this invention is provided on its top face with marginal ribs 18 and transverse ribs or partitions 13 forming a plurality of individual fuel pockets 20 adapted to retain fine fuel, and on its bottom face with recesses forming air pockets 25 preferably corresponding to the fuel pockets 20. The

transverse partitions 13 on the top face of the bar and'the transverse partitions 14 on the bot-tom face thereof are preferably diagonal. These fuel pockets are preferably about one-half to five-eighths of an inch deep, more or less. The fuel pockets 20 are connected with the air pockets 25 by'ventilating holes 15 preferably tapering and largest at their lower ends, being preferably about three eighths of an inch in diameter at the top and fifty per cent. larger at the bottom. These holes may be arranged in sets of two disposed apart from each other, the holes of one set being opposite the spaces between the holes of the adjacent set or sets. The grate bar may also be provided wit-h tapering ventilating holes 16 which open flush with the top and bottom faces of the bar and pass through the marginal rims or ribs 18 thereof or through the diagonal partitions or ribs.

The grate bar may be provided on one or both sides with channels 17 adapted to form with corresponding channels on an adjacent bar or bars additional ventilating holes.

In the use of these grate bars they are disposed together in touch one with another on ledges 30 or other suitable supports within the fire box as shown in Figs. 5 and 6.

The tapering form of the ventilating holes tends to cause a discharge of the air in jets into the fuel. When the fire is raked, the marginal rim and cross partitions or ribs cause the scraper or rake to pass over the incandescent fuel in the pockets and said fuel serves to ignite the fresh lignite or other fuel with which the fire is replenished. The diagonal direction of these ribs permits the rake to pass Without obstruction.

In ordinary grates especially where a forced or induced draft is used, there is a tendency of the air to rush through the weakest places in the fire. In a grate composed of this improved grate bar the individual air pockets underneath tend to prevent the air rushing past some of the ventilating holes and overcharging others. These air pockets form separate sources of supply to the separate groups of ventilating holes and cause an even distribution of the air to the fuel pockets in the top of the bar throughout the grate surface.

I claim as my invention 1. A grate bar provided on its top face with marginal ribs and transverse partitions forming a plurality of individual fuel pockets adapted to retain fine fuel, said bar hav ing ventilating holes extending through the body thereof and opening into said pockets.

2. A grate bar provided on its top face with marginal ribs and diagonal transverse partitions forming a plurality of individual fuel pockets adapted to retain fine fuel, said bar having ventilating holes extending through the body thereof and opening into said pockets.

3. A grate bar provided with individual fuel pockets in its top face, separated by transverse partitions, individual air pockets on its bottom face and ventilating holes connecting said pockets.

4. A grate bar provided with individual fuel pockets in its top face, separated by transverse partitions, individual air pockets in its bottom face and upwardly tapering ventilating holes connecting said pockets.

5. A grate bar provided with individual fuel pockets in its top face, separated by transverse partitions, corresponding individual air pockets on its bottom face and ventilating holes connecting said pockets.

(3. A grate bar provided with individual fuel pockets in its top face, separated by transverse partitions, with ventilating holes extending through the body of said bar and opening into said pockets and with ventilating holes extending through the body of said bar and opening flush with the top face thereof.

7. A grate bar provided with individual fuel pockets in its top face, separated by transverse partitions, with ventilating holes extending through the body of said bar and opening into said pockets and with ventilating holes extending through the body of said bar and through the separating partitions between said pockets and opening flush with the top face thereof.

8. A grate bar provided with individual fuel pockets in its top face separated by transverse partitions, and with ventilating holes extending through the body of said bar and opening into said pockets, said bar being provided with air channels in its side adapted to form ventilating holes with corresponding air channels on an adjacent grate bar.

9. A grate bar provided with individual fuel pockets in its top face separated by transverse partitions, with individual air pockets in its bottom face, with ventilating holes connecting said pockets, and with ventilating holes extending through the body of said bar and opening flush with the top face thereof.

10. A grate bar provided with individual fuel pockets in its top face separated by transverse partitions, with individual air pockets in its bottom face, with ventilating holes connecting said pockets, and with ventilating holes extending through the body of said bar and through the separating partitions between said fuel pockets.

11. A grate bar provided with individual fuel pockets in its top face separated by transverse partitions, with individual air pockets in its bottom face, with ventilating holes connecting said pockets, and with ventilating holes extending through the body of said bar and opening flush with the top face thereof, said bar being provided with air channels in its side adapted to form ventilating holes with corresponding air channels on an adjacent grate bar.

12. A grate bar provided with individual fuel pockets in its top face separated by transverse partitions, with individual air pockets in its bottom face separated by transverse partitions, with ventilating holes connecting said pockets, and with ventilating holes extending through the body of said bar and through the separating partitions between said pockets and opening flush with the top face thereof, said bar being provided with air channels in its side adapted to form ventilating holes with corresponding. air channels on an adjacent grate bar.

ANDERSON WILDERSPIN.

WVitnesses:

F. B. Mnnns, JAs. KIRK.

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