US844941A - Grate-bar. - Google Patents

Description

No. 844,941, PATENTED PEB. 19, 1907. A. L. HOWARD.

GRATE BAR.

APPLIOATION FILED` JUNI: 14, 1906.

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GRATEBBAP.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed June 14,1906. Serial No, 321,644.

- of this character adapted for the purpose of lward undercut edges 6.

burning culm, sawdust, and the like.

The object of the invention is to provide a device of this class simple, strong, and durable in construction and inexpensive to manufacture and which presents removable top sections which may be easily replaced from time to time as circumstances require.

A further object of the invention is to provide a grate-bar particularlyadapted to the burning of fuel consisting of small particles, such as sawdust.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure l is a plan view of a grate-bar of my invention. Fig. 2 is a longitudinal vertical section on the line 2 2 of Fig. 1. Fig. 3 is a vertical cross-section on the line 3 3 of Fig. l. Fig. 4 is a longitudinal section of a portion of the device on the line 4 4 of 1, and Fig. 5 is a longitudinal section of a part of the device on the line of 5 5 Fig. l.

Referring more particularly to the drawings, the improved grate-bar is .provided with longitudinal side pieces or bars l, joined by end pieces 2 and transverse uniting- pieces 3 and 4. The end pieces and transve; se pieces are preferably formed integral with the longitudinal bars, and the device may be constructed of cast-iron or other similar suitable material. The end pieces 2 are provided on their under side with projections 5, and the grate-bar is hung in the furnace by means of its extremities in the usual manner. The end pieces 2 extend above the upper edges of the longitudinal bars 1, presenting in- The transverse piece 4 extends upwardly above the edges of the longitudinal bars, vwhich it joins, while upper edges flush with the edges of the longitudinal bars.

Removable sections 7 are employed, which are adapted to be placed upon the longitudinal bars l. rIhe ends of the sections 7 that are adjacent to the ends of the bar have beveled edges S, which are adapted. to engage with the undercut edges 6 of the end pieces, asappears most clearly in Fig. 2. he sections 7 are provided with a plurality of perforations 9, which are preferably comparatively small in size and large in number to permit the burning of small-sized fuel, such as sawdust. The perforations preferably taper upward, as shown in Figs. 2 and 3. The sections 7 extend laterally beyond the longitudinal side bars I, and the sides of these sections are pro,- vided with semieircular recesses, which, with similar recesses in sections of adjacent gratebars, form pei'forations IO.

The ends of the sections 7 adjacent to the transverse piece 4 are provided with recesses which are adapted to receive the upward extension of the transverse piece 4. The edges of the sections adjacent to the recesses adapted to receive the transverse piece 4 are beveled or undercut to engage with the corresponding undercut or beveled edges adjacent to the recess of an opposite section 7. It will be understood that by means lof the beveled and undercut edges, as well as the engagement of the transverse piece 4with the edge recesses of the sections 7, the latter are securely retained from accidental displacement in firing and cleaning the furnace. An additional safeguard against accidental displacement is afforded by forming integral lugs ll on the under side of the sections l, these lugs extending transversely across the section and being adapted to fit between the longitudinal bars I.

It is preferred to provide each grate-bar with two perforated sections 7. These are removable and may be used interchangeably at either end of the device. 'Io remove such sections, it is merely necessary to raise them near the middle point, where they engage with the transverse piece 4, and draw them out from engagement with the undercut edges of the end pieces. It will be understood that. they may be used interchangeably at either end of the bar, as the edges of the sections 7 adjacent to the recesses adapted to receive the transverse piece 4 are alternately beveled and undercut, while the edges of the the remaining transverse pieces 3 have their opposite section are alternately undercut and IOO beveled. By means ol removable top sections the grate-bars may be conveniently renewed at small cost, for the destructive ei'lect of the iire does not directlyreach the bar itself, but practically affects the movable top sections alone, and these are easily removed and replaced witliout difficulty and at low cost.

Having thus described my invention, I claim as new and desire to secure by Letters Patent` l. A device of the class described7 comprising longitudinal bars having end pieces and transverse pieces uniting said bars, one' of said transverse pieces having an upward projection, said end pieces being undercut, and perforated sections adapted to rest upon said bars, said sections having ends adapted to engage with said undercut end pieces and recesses adapted to receive said projection.

2. A device of the class described, comprising longitudinal bars, having end pieces and transverse pieces uniting said bars, said end pieces extending above said bars and presenting undercut edges, one of said transverse pieces projecting above said bars, and perforated sections each having a beveled edge adapted to engage with one of said undercut end pieces, said sections each having a recess adapted to receive said projecting transverse piece.

3. A device of the class described coini prising longitudinal bars having transverse pieces uniting said bars, one oi said transverse pieces projecting above said bars, and

removable perforated sections upon said bars, means for holding in place the ends of said sections adjacent to the ends of the device, said sections having recesses adapted to i receive said projecting transverse piece, an

edge of one ci said sections adjacent to the recess being beveled to engage with an undercut edge of an opposite section, and an edge of said section adjacent to said recess undercut to engage with the beveled edge of the opposite section.

4. A device of the class described, comprising'longitudinal bars, having end pieces projecting above said bars, and transverse pieces uniting said bars, one of said transverse pieces projecting above said bars, said end pieces presenting inward undercut'edges,

and perforated sections having beveled edgesy adapted to engage with said undercut edges ol said end pieces, and recesses adapted to receive said projecting transverse piece, the edges otl said sections adjacent to said recesses being adapted to engage the edges of y an adjacent section, said sections being provided on the under side with transverse-lugs adapted to 'lit between said bars.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALVAH LESTER HOl/VARD.

Witnesses D. O. VINCENT, S. A. FAIRGHILD.

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