US1379272A - Boiler-grate - Google Patents

Description

A. MASCI.

BOILER GRATE.

APPLICATION FILED JULY 23,1920.

1,379,272. Patented May 24, 1921.

ARMANDO MASGI, OF GENOA, ITALY.

BOILER-GRATE.

Specification of Letters Patent.

Patented May 24, 1921.

Application filed July 23, 1920. Serial No. 398,501.

To all whom it may concern:

Be it known that I, ARMANDO MASOI, a subject of the King of Italy, residing at Genoa, San Fruottuoso, Italy, have invented certain new and useful Improvements in Boiler-Grates, of which the following is a specification.

This invention relates to grates for steam boiler furnaces, and more particularly to the grate bars, the object of the invention being to provide the same with a novel construction and arrangement of fuel-supporting pockets designed to save fuel, and to obtain better combustion and a fire requiring a minimum of attention.

The object stated is attained by means of a combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying drawing forming a part of this specification.

In the drawing, Figure 1 is an elevation of one of the grate bars; Fig. 2 is a plan View showing a fragment of two adjacent ones of said bars; Fig. 3 is a section on the line 8-3 of Fig. 2, and Fig. 4 is a cross-section on the line 4-4 of Fig. 2.

Referring specifically to the drawing, the grate bars 5 are supported in the fire box of the furnace in the usual manner, and they are of the usual shape, and held in parallel and laterally spaced relation by rods 6 carrying spacer sleeves 7 which seat between adjacent ones of the bars.

On the top edge of each grate bar 5 is mounted a series of fuel-supporting pockets 8 in the form of shallow trays having a rectangular contour. These trays are spaced at their ends, and those of one grate bar are spaced at their sides from the ones of adjacent bars. It will also be noted in Fig. 2 that the trays of adjacent bars are set staggered or in break-joint order. The spacing of the trays enables the air flowing upwardly between the grate bars to freely pass through the spaces between the trays 1nto the fuel bed, and a copious supply of air is assured, there being nothing to impede the flow of air to the fire. Referring to Figs. 3 and 4:, it will be seen that the trays ta er downwardly at their ends and sides, so t at the spaces between the trays expand or flare downwardly, so as not to fill with ashes, and for the same reason, the grate bars have a downward taper.

For the purpose of supporting the trays 8 in rigid position on the grate bars 5, the latter have top recesses 9 to seat end and bottom portions of the trays. The bottoms of the trays also have recesses 10 running in the direction of the ends thereof to seat the bars at the deepest or bottom portions of the recesses 9. Through the bottom of each tray also extends a stem 11 carried by the grate bar, and threaded at its upper end to take a nut 12 which is screwed down against the bottom of the tray on the inside thereof. The stem 11 has a head 13 which is embedded in a recess 14; in the grate bar beneath the recess 9. The recesses 14 and 9 are connected by a reduced passage 15 through which the stem 11 extends into the recess 9 for connection of the tray therewith.

By the means hereinbefore described, the trays 8 are all separately and securely fastened down on the grate bars 5, and if any of the trays burn out or become otherwise damaged, they can be readily removed for renewal.

The trays 8 extend throughout the entire area of the grate and support the bed of fuel. At the bottom of the fuel mass, the same fills the pockets formed by the trays. The fuel in these pockets causes the tire to burn for a considerable length of time without attention, and the fuel is completely consumed, perfect combustion resulting, and

also a saving of fuel.

I claim:

A grate comprising a plurality of parallel and laterally spaced grate bars, and fuel receivingpockets mounted on top of said bars, said pockets consisting of shallow trays having bottom recesses to straddle the bars,'the top edges of the bars having recesses to seat bottom portions of the trays, stems carried by the bars and extending through the bottoms of the trays, said stems having heads at their lower ends, and the bars having recesses to seat the stems, said recesses opening into the second-mentioned recesses, and having enlarged bottom portions to seat the heads of the stems, and nuts screwed on said stems for clamping the trays down on the bars.

In testimony whereof I afiix my signature.

ARMANDO MASCI.

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