US1746126A - Grate - Google Patents

Description

Feb. 4, 1930. K; MOORE 1,746,126

GRATE 7 Filed NOV. 28, 1927 INVENTOR MK. More,

4 I w -Z BY JLWMj ATTORNEY Patented Feb. 4, 1930 MORTON MOORE, or CHARLESTON, sou'rr-r CAROLINA GRATE Application filed November 28, 1927. Serial No, 236,219.-

My invention relates to grates, and more particularly to improvements in the grate bar disclosed in the co-pending application of Henry K. 'Milner, for grate, filed June 14, 1926, Serial No. 115,928, and which application was assigned to me August 24, 1927 An object of the present invention is to generally improve the interchangeable grate elements disclosed in the above identified application.

The invention further provides a grate elementor unit which is so constructed as to prevent the accumulation of hot coals and the resultant burning out of the grate elements or units.

Further the invention contemplates a grate element wherein a maximum natural draught will be conducted thereto, and thus keep the grate element in a maximum cool state. 1

With the preceeding and other objects and advantages in mind, the invention consists in the combination of elements, construction, arrangement of parts and operations to be hereinafter specifically referred to, claimed and illustrated in the accompanying drawings, wherein: I

Figure 1 is a fragmentary horizontal sectional view of a fire box having made up from my improved replaceable grate element or unit;

Figure 2 is a front elevation of my im: proved grate element received in its supporting bar, the supporting bar being shown in vertical cross section;

Figure 3 is a vertical sectional view taken on line 3-3 of Figure 2;

Figure 4 is a horizontal section on line 4-4: of Figure 2; V

Figure 5 is a side elevation of a modified embodiment of the invention.

Figure 6 1s a vertical section taken on line 6-6 of Figure 5; and

Figure 7 is a fragmentary perspective of the supporting bar embodied in the inven tion.

Referring to the invention in detail, a hollow rectangular supporting bar 5 having vertical rectangular cells or sockets 6 is provided.

My improved grate element or unit comgrate bars prises a longitudinally. curved segment 3 cast with lateral enlargements 10 substantially' triangular in vertical cross section. These enlargements 10 are of greater width than the transverse width" of the segments andare formed with a V-shaped seat 11 at one end, and a V-shaped tongue 12 at its opposite end which interfits in the V-shaped'sea't 11 in the enlargement of the adjacent element. As illustrated in Figure 1', the seats 11 and tongues 12, of the enlargements of each grate element or unit are disposed reversely so that all of the grate elements interfit and retain the grate in assembled relation to afford a fire bed or grate surfacel' Due to the arrangement of the seats and tongues, the grate elements or sections can only be assembled in mating relation. In order that the grate bars may be rocked to dump or clear the same, the

opposite ends ofthe enlargements 10 are beveled as indicated at 9. Formed integrally with the segment 3 and arranged directly below the slots or ventilatingopenings 13therein is a pair of oppositely arranged curved arms 14 whose outer ends merge into the underface of the enlargements and ends ofthe segment. These arms'have their upper edges 15 beveled to cause dropping coals or thereby prevent accumulationof hot coals or ashes which ordinarily would burn out or destroy the grate'element. I

A central vertical brace 16 integrally con: nects the under face of the segment and the arms 14 which, in addition to reinforcing the grate element, alsoserves to support the segment in the event that the latter becomes cracked or broken at one ,or both sides of the brace. V J g A vertically disposed shank 17 rectangular in cross section is connected with the arms 14k in vertical alinement with the brace 16, andis adapted to be received in one of the rectangularsockets or cells 6 in the supporting member 5. Withtheshank thus positioned the segment 3 extends transversely of the member 5 above the latter. Vertical grooves 18 extendithe' entire length of the opposed faces of the shank, and constitute 'air'fpassages which' communicate. at their ashes to fall therefrom, and

upper end with lateral outlet openings 19 to supply air currents to the arms 14 and adjacent parts for cooling purposes.

This construction produces a clear airway to the grate elements and fuel, thereby giving a maximum life to the grate elements and causes more perfect combustion of the fuel. 7

To prevent accumulation of burning coals or ashes between adjacent grate elements, inverted V-shaped shields or deflectors 20 are disposed upon opposite sides of the arms and brace 16 directly above the air passage ways. These shields, or deflectors project laterally and are positioned with their apexes disposed at the vertical center of the brace 16 and their ends pr,ojecting beyond the openings 19. As illustrated in Figure 1, the shields or deflectors of the adjacent grate elements abut to entirely close the space between the grate elements above the member 5. It will be observed that any coals or ashes dropping between the grate elements will be deflected laterally beyond the opposite vertical faces of the member 5 so that they will fall directly into the ash pit below. In this connection, it will be observed that the lower edges of the shields or deflectors extend slightly beyond the member 5.

In Figures 5 and 6, I have illustrated my improvement with a modified form of grate element. In this instance a flat bar 21 is formed at the upper end of a vertically extending web 22 from which the shank 17 0 extends.

In this instance the deflectors or shields 20 are cast on the opposite faces of the web directly. above the shank. The bar 21-is of greater cross sectional area than the web, and the under face of the bar is bevelled upon opposite sides of the web as at 23 to direct air currents along the bar to prevent burning out of the latter. To further aid in a the cooling of the grate element, the web is provided with ventilating openings 24;. If desirable the bevels 23 may be substituted by square corners.

What is claimed is:

In a grate element, a fuel supporting member, a shank extending from the under side of the fuel supporting member and located centrally of the extremities of the latter, an

inverted V-shaped member projecting laterally from one face of the fuel supporting member above the shank and having its ends projecting downwardly beyond 7 opposite sides of the shank, the shank having a longitudinally extending air passage throughout its entire length and laterally extending air passages at its upper end which open'on 0pposite faces of the shank at points adjacent the lower ends of the inverted V-shaped member Signed at city of Washington in the District of Columbia, this fourth day of November, 1927.

MORTON -K. MOORE;

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