US1721413A - Grate-bar support - Google Patents

Description

July 16, 1929. w. H. RIDGWELL 172L413 (RATE BAR SUPPORT 4 Filed June 28, 1927 2 Sheets-Sheet 1 kzvyl.

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July 16, 1929. w, H'RmGwELL 1.721 413 GRATE BAR SUPPORT 4 Filed June 28/1927 2 Sheets-Sheei. 2

A TTORNEY$ Patented July 16, 1929.

UNITED STATES WILLIAM HENRY RIDGWELL, OF NORFOLK, VIRGINIA.

GRATE-BAR SUPPORT.

Application filed June 28,

This invention relates to bearer bars to be used in connection with boilers, more specifically, marine boilers.

The principal object of this invention is to provide additional supports, in the way of bearer bars, to grate bars, where the grate bars are forced to span a considerable space.

Another object of this invention is to provide means whereby the supporting bearer bars may be removed and replaced without disturbing the grate bars.

Other objects will be shown and described in the specification and claims.

In the drawings Figure 1 is an end view of a furnace with a portion of the front head of the boiler removed.

Figure 2 is a top plan of the furnace with the top portion removed, and bearer bars assembled.

Figure 3 is a section taken along line 3-3 of Figure 2.

Figure 4 is a section taken along line 44; of Figure 2.

Figure 5 is a perspective of a lug, broken away from the side bearer bar.

Figure 6 is a perspective of the transverse bearer bar. V

Figure 7 is a modified form of bearer bar,

and

Figure 8 is a rear elevation of the lug, broken away from the side bearer bar.

In the drawings, like numerals designate similar parts.

Numeral 1 designates the outside casing of a corrugated furnace having a front bearer bar 2 and a back bearer bar 3 securely held between the corrugated walls 1. Resting on the front and back bearer bars are side bearer bars 4 coinciding with the corrugations of the outside wall 1. Extending, downwardly from said side bearer bars are lugs- 5 having a side flange 6 and a beveled bottom flange 7. Projecting up from the bot tom flange is a bolt 8. Beneath the flange 7 is a support 9 which continues along the back side of said lug 5 to form a support for the side bearer bar 1. Resting in the lug 5 are transverse bearer bars 10 which support the grate bars 11.

Figure 7 shows a modified form of bearer bar which may be used when greater air 1927. Serial No. 202,034.

space is desired. This bar consists of parallel members 12, with air spaces 13 formed by separators 14, holding the parallel members 12 apart.

It is well known in the art to have side bars resting on end bearer bars, but so far as I know, it is new and novel to have side bearers bars with lugs for the purpose of forming supports by the means of additional bearer bars for the grate bars in the manner shown and described. 1

It has been my experience that where the grate bars are subjected to great strain by virtue of along span, they break very quickly when only slightly burned. By having supports at the points of greatest stress, the life of the grate bars is materially lengthened. By the use of these supports, a material saving is made in the depth of the grate bars in that the arc in the grate bars need not be nearly so great, thereby reducmg the weight of the grate bars which results in a substantial saving in material.

hen it is desired to replace the transverse bearer bars, all that is necessary is to remove the bolts holding the transverse bear-- er bars in place. I-Ieretofore, so far as I know, it was necessary to remove the grate bars before the, transverse bearer bars could be removed or replaced. In my device, I can remove and replace the transverse bearer bars without disturbing the grate bars.

Knowing that the same purpose may be accomplished by other means, my invention is not limited to the exact manner or means as disclosed herein.

Having described my invention, what I claim as new and novel is:

1. A grate bar support comprising bearer bars positioned beneath and away from the ends of a grate bar, lugs for supporting thesaid bearer bars, each of said lugs comprising a side and bottom flange, said bottom flange having a removable projection thereon to permit the removal of said transverse bearer bars without disturbing the grate bar.

2. A grate bar support comprising bearer bars positioned beneath and away from the ends of a grate bar, lugs for supporting the said bearer bars, each of said lugs comprising a side and bottom flange, said bottom flange having one edge beveled and a removable projection adjacent said beveled edge to ably supporting said transverse bearer bars permit the removal of sald transverse bearer and lormed to permit. horizontal removal of 10 bars Withoutdisturbing the grate bar. the bearer bars without disturbing the said 3. In a boiler, a grate bar, means at each grate bar. 0f its, ends for supportlng said grate bar, In testimony whereof I allix my signatransverse bearer bars intermediate the ends ture. of said-grate bar to provlde auxiliary supports for said grate bar, means for reIn0v- WVILLIAM HENRY RIDGVELL.

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