USRE10296E - Grate-bar - Google Patents

Description

UNITED STATES PATENT OFF CE.

GEORGE W". \VALKER, OF MALDEN, MASSACHUSETTS.

GRATE-BAR.

SPECIFICATION forming part of Reissued Letters Patent No. 10,296, dated March 13, 1883,

Original No. 246,645, dated Septemherfi, 1881. Application for reissue filed February 2, 1883.

To all whom it may concern Be it known that I, GEORGE W. WALKER, of Malden, county of Middlesex, and State of Massachusetts, have invented a new and useful Improvement in Grate-Bars, of which the cams for operating the grate-bars serves also 7 as a supporting and trunnion shaft for the (lumping-frame, thus making my improved grate-bar applicable to any furnace, in place of the usual grate-barof substantiallythe same shape. Each of my improved grate-bars is extended only apart of the way across thedumping-frame, and is pivoted at its inner end, so that when a downward projection of the gratebar is acted upon by a cam the outer end of the grate-bar will be raised andlowered rapidly. Adjacent grate-bars are provided with projections and shoulders to prevent the grate-bars leaving the notches or combs of the dumpingframe when. the latter is turned over.

Figure 1 represents in top view a grate and dumping-frame embodying myinvention; Fig. 2, a section on the dotted line a: m, Fig. 1. Fig. 3 is a partial side elevation of the dumpingframe. Fig. 4 is a front end elevation of the dumping-frame, and Fig. 5 is a side elevation of the cam-shaft.

In the drawings, A represents the dumpingframe, it being oblong, the sides a of the frame being provided with a series of upright combs or fingers, 3, in the notches between which the series of grate-bars b c, near'their ends, are entered and guided. The grate-bars are each provided with a suitable hole to fit a rod, d, the end of which has suitable bearings in the end a of the dumping-frame, and at one end is covered by a cap, a secured to the front end of the dumping-frame, the projections 4 5 (see Fig. 1) extending over the said rod d near its ends. The grate-bar b has a downwardlyprojecting finger or arm, b', and the shoulder b and each grate-bar c has a corresponding downwardly-projecting arm or finger, c, and the reverscly-placed notch or shoulder 0 these arms I) and 0, below the pivotal pointdof the grate-bars, being suitably shaped to present proper cam-surfaces to be acted upon by short cam projections c, more or less in number, and arranged, as shown in Fig. 5, on the shaft e the front end of which is squared, as at 6 to receive the usual wrench or handle with which to rotate the said shaft 6 to vibrate the gratebars, and also to turn over the dum ping-frame. As the shaft 6 is rotated in the direction of the arrow, 8M5. Fig. 2, the cam projections will strike against the portions 6 of the grate-bars c and the portions 7 of the grate-bars b, and will move them so as to elevate the outer ends of the grate-bars, and as the cams pass the shoulders I) c the grate-bars, by their own gravity and the weight of the tuel upon them, will drop.

The lefthand end of the shaft serves as thejournalforthedumping-frame,andtheneck 8 of the right-hand end of the said shaft, (see Fig. 1,) which in practice will be from two to three inches in length, serves as a journal to fit a proper bearing to sustain the front part of the dumping-frame. hen it is desired to tip over the dumping-frame, the shaft 0 will be turned in the direction opposite the arrow, Fig. 2, when the cam projections 6 will strike squarely against the shoulders c and b and will turn the dumping-frame over toward the left, as herein. shown, the frame being capable of being turned over only in that direction. As described, it will be understood. that this shaft 6 serves the purpose of the journal for the dumping-frame, and is provided with cams by which to vibrate the grate-bars when the shaft is turned in one direction, and the gratebars are so shaped that when the said shaft is turned in the opposite direction the cams J thereon, operating against the shoulders of the grate-bars, will turn the dumping-frame over. Each grate-bar b has a projection, m, to strike against a shoulder, 10, of the grate-bar c in dumping-frame is turned over the said projecengage a lug,f, of the dumping-frame, and at its other end the cap has a leg to enter-a socket ot' the dumping-frame, the leg being secured in the said socket bymeans of apin, 0, extended therethrough, as shown in the said figure.

These grate-bars, fixed at their inner ends substantially at or near the longitudinal center of the dumping-frame, are vibrated up and down at their outer ends, moving only at the said outer ends. '1 do not broadly claim a grate-bar mounted loosely in a dumping-frame, so that each end of the grate-bar may be moved up and down by means of cams on an independent shaft other than that which serves as the journals for the dumping-frame.

I claim 1. The combination, with the frame, ofgrate: bars I) c, pivoted at their inner ends, and a camshaft to operate upon downwardly-extended portions of and vibrate the said grate-bars about their pivotal point, substantially as described.

2. The pivoted grate-bar provided with a downwardly-projecting arm, shouldered as described, combined with a dumping-frame and with a cam-shaft which, turned in one direction, will vibrate the said grate-bar, and in the other direction will turn over the dumpingframe, substantially as described.

3. The dumping-frame provided with the fingers or projections3 to receive the grate-bars, combined with the independent grate-bars b 0,

having their inner ends pivoted substantially at the center of the dumping-frame, as set forth.

4. The frame, its rod d, and the series of gratebars b c, the bars 11 being substantially in line with the series of grate-bars a, one grate-bar I) being at one side of the frame, while a gratebar 0 is at the opposite side of the frame, in line with it SubstantialIy as described.

5. The dumping-frame, its cam-shaft, and

rod d, combined with the series of grate-bars b c,providedwith projectionsmnand shoulders 12 10, to operate substantially as described.

6. The dumping-frame'and a series of gratebars mounted thereon, combined with a shaft adapted to serve as thejournal for the dumphates the grate-bars and serves as the journal for the dumping -i'rame, the same shaft when rotated in one direction operating only the grate-bars on the dumping-frame, and in the other direction turning thednmpin g-t'rame.

8. The dumping-frame combined with the cam-shaft to actuate the grate-bars, the said shaft being arranged to serve as the journals about which the said frame may be turned when it is desired to dump the same.

9. The dumping-frame and the cam-shaft to support it, combined with a series of movable grate-bars having curved surfaces, against which the cams act in one direction of the shaft to, move the grate-bars, and with shoulders against which the cams of the cam-shaft act whenthe latter is rotated in an opposite direction to dump the dumping-frame, substantially as described.

GEO. W. WALKER. Witnesses:

G. W. GREGORY, B. J, NoYEs.

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