US1561456A - Furnace grate - Google Patents

Description

L. J. BINDER FURNACE GRATE Nov. 1:1, 1925.

Filed Feb. '2, 1925 Patented Nov. 17, 1925.

UNITED STATES LEO J. BINDER, 0F SIOKANE, WASHINGTON.

FURNACE GRATE.

Application filed February "7, 1925.

To all whom t may concern.'

Be it known that I, Lao J. BINDER, a citizen of the United States, residing at Spokane, in Spokane County and State of Washington, have invented certain new and useful Improvements in Furnace Grates, of which the following is a specification.

My present invention relates to limprovements in furnace grates of the stationary or immovable type and particularly to the end sections utilized at the front and rear of the furnace for suspending or supporting the stationary grate bars and the fuel supporting elements that rest upon said grate bars.

The primary objcct of the invention is to improve the construction of the end sections of the grate bars in such manner as to I1nsure facility in assembling, and dismantling the grate for replacement of worn parts; to combinethe end sections with the grate bars to support or suspend the latter with the necessary allowance for expansion and contraction without danger of twisting or distorting the parts; and to improve the structure of the end sections as to other features will more fully be pointed out and claimed hereinafter.

The invention consists in the novel combination and arrangement of parts between the several features of the end sections as illustrated in the accompanying drawings wherein I have shown one complete example and slight modifications of the physical embodiment of my invention wherein the parts are combined and arranged according to the Ibest mode I have thus far devised for the practical application of the principles of my invention.

\ Figure 1 is a. perspective vie-w of one of the complementary sections used at the ends of a grate bar for suspending or supporting the latter.

Figure 2 is a detail sectional view at one wall of the furnace showing a fixed supporting bar and the relation thereto of one end section of the gra-te bar, together with an end of a grate bar.

Figure 3 is a top plan view of one end section slightly modified in form from that shown in Figures 1 and 2.

Figure 4 is a top plan view of an end section and part of a removable fuel supporting' element, the former being slightly changed from that shown in Figure 3.

In order that the general arrangement of parts and assembly may readily understood Serial No. 7,720.

I have shown a portion W of the furnace wall and one of its fixed supporting bars 1 built into the wall at the front and rear of the furnace and extending transversely thereof for supporting the series of longitudinally extending parallel grate elements.

The grate bars are arranged in pairs as indicated at 2 and 3 and are located above the ash pit a portion of which is designated 4 in Figure 2. These bars as shown in Figure 2 have hooked ends with curved notches 5 in their under edges, and each bar has at its ends an inclined wear face 6.

One of the fuel supporting grate sections is indicated at 7 in Figure 4, resting upon a pair of the `grate bars 2 and 3 which are spaced apart.

The grate bars are supported or suspended in pairs at their hooked ends atthe front and rear of the furnace, and these end sections which support the bars being of complementary construction, are interchangeable. A description and illustration of one end section will be sufficient for both sections. The end section of Figures 1 and 2 has a top fiat body 8 and grate openings 9 therein. The outer end of the body is fashioned with an obliquely disposed, inclined, supporting lip or lug 10 adapted to rest upon the fixed supporting bar 2 which extends transversely of the furnace. This lug or lip ext-ends throughout the width of the section and is disposed at an angle to the vertical as well as to the longitudinal axis of the grate bar.

At the under face of the body of the end sections are two parallel flanges or webs 11 which merge with the downwardly projected integral ears 12 and 13, and each of these ears is fashioned with a round or circular boss 14. The bosses 14 project laterally from adjoining sides of the ears `at their lower ends and are bored hollow or cored out in the castingv as at 15 to permit circulation of' air and radiation of heat from the bosses and ears to assist in cooling them.

As will be seen in Figure 2 the bosses are designed to receive the curved notches 5 of the hooked ends of the grate' bars and suspend said bars in the furnace.

For co-action with the inclined faces 6 of the grate bars I provide the end sections with a pair of flanges 16. These ianges 16 are integral with the websl l1 of the end sections and project downwardly from the body of the section and laterally from the inner faces of the ears 12 and 13. The

flanges` are located above the bosses and outside of the vertical line extending from the axis of the bosses in order that the hooked. ends of the grate barsY may be suspended from the bosses, and the end sections7 which latter are supported on the transverse bar 2, may rest upon the grate bars with these lugs in frictional Contact with. the inclined faces or edges 6 of the grate bars. In this manner a stable support is provided for the grate bars, they may readily be placed in position, and provision is made for contraction and expansion of the grate members under influence of heat from the furnace.

At the sides of the end sections and laterally projecting therefrom are reinforcing websv 128A which materially. strengthenthe ears 12 and 13 of the end section and prevent undue warping or twisting under furnace heat.

The outer oblique and inclined supporting lip 10 of theV end section, as indicated in Figure 2 co-acts with the furnace wall, under expansion of the grate bar and end section to lift and also laterally displace ashes that may fall on the fixed bar 1 of the furnace,` and thus` relieve the furnace wall from strain due to expansion of the grate bars.

The flat lbody. S of the endV section may have an obliquely dis-posed Z-shapedl inner end 19 as shown in Figures 1 and 3, or the section. may'terminate at its inner end with a straight oblique edge 20, and in either case the adjacent end of the fuel supporting element of the grate will conform theretoT as indicated' by the conplementary edge 21 of the fuel supporting element.

rlEhe several parts of the grate are standard-ized as to. sha-pe andsizes, and the area of the body of the end section is proportioned to the length of the grate balrsand fuel supporting members. In all cases vthe outer end of the end-section body is made solidy as indicated toprevent ashes or fuel from accumulating on the fixed transverse bars 1 of the furnace. The inner endsr of the body' of the end-sections are perforated to prevent clogging and toV furnish openings for. the updraft of air through the grate-and to assistiinr cooling the grate.

It will be noted in Figure 2 that the suspended weight between the front' and rear fixed bars l of the furnace is supported at the respective ends of the grate on the three points-the lower edge of the lip 10 on the bar 1, the notched hook-end of the grate bar on the hollow boss, and the intermediate point where the inclined end of the grate bar contacts with the complementary edge of the flange 16 of the end section. r1`he under surface of the body of the end section rests lightly, if at all, on the end of the grate bar. By this arrangement of parts the assembling and dismantling of the grate is facilitated and a flexibility is secured to compensate for expanding andA contracting movement of the different elements of the grate under the influence ofv heat.

Havingl thus fully described my invention, what claim as new and desire to secure by Letters Patent is:

1. An] endlr section for ai stationary grate comprising a fiat body portion having a transversely extending supporting lip and formed with an. inclined outer face, spaced longitudinal webs integral withv said body and' lip and' perforated ears integral with said webs, hollow supporting bosses on the inner adjoining faces of said ears, and a pair of flanges having inclined faces located between said bosses and transverse lip.

2. An end. section for a stationary grate comprising a flat body portion having an obliqu'ely extending supporting lip at lits outer end andi an inclined face onA said lip, spaced longitudinal webs integral with said body and lip, downwardly projecting perforated ears integral with saidwebs and. hollow bosses on the adjoining faces of said ears, ai pair of' flanges on the webs located between the bossesf andi said lips; and exterior reinforcing flanges integral with said? body and ears.

3. The combination with a fixed' supporting bar7 of an endsection having an obliquely disposed lip on the supporting bar, downwarliy projecting perforated ears.I on said: end section and hollow bosses integral with said ears, said ears having flanges with. inclined faces a pair. of grate bars havingv hooked ends resting on saidl bosses, and inclined wear faces on said hooked ends for co-action with said flanges;

IIL testimony'whereof' affix my' signature.

LEOJ. BINDER'.

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