US1660843A - Grate - Google Patents

Description

R. B. KELLY GRATE Filed Feb. 12. 1927 2 Sheets-Sheet. 1

Feb. 28, 1928. I 1,660,843

R. B. KELLY GRA'X'E Filed Feb. 12. 1927 2 Shoots-Sheet 2 Patented Feb. 28, 1928.

Uri/Effie I V attach n. B. KELLY, oneosnnn, i'nnrnnanssrenon To KELLY. roUn'nRY a; Maonmnoo; A

oonronn'rrou or INDIANA.

enArE:

Application filed February 12 -1927. Serial no. le /.689.

This invention relates toimprovements in grates and more specially to that. type of grate commonly known; as av hand stoker where the grate is arranged on a slant. and

fl by operation thereof, the fuel. is moved progressively over the surface of; the same as it'is-being consumed..xln grates ofthis type, the green fuel is placed at the upper edge, and then by'handc manipulation 'of the grate this fuel is fedior'moved progressivelydownwandly on. the grate until it reaches thebotvided. withquadrant shaped sectors, such sectors forming radiating finsin. order to radiate the heat more effectively from the grate and thus prevent. deterioration thereof.

Such sectors also prevent'the grate from clogging since they give a cleaving actionin the operation thereof; and theyalso provide a constant air spacethrough the-grate, thus preventingundesired variations in the draft. T Other features of my invention are the improved means. for locking or retaining the: shaking bar frames in. the stationary grate frame.

Other features and advantages of my. in vention will: appear more fully as I proceed with my specification.

e In that form of device embodying the features of my invention, shown. in the accompanying drawings, Fig. 1 is a top plan v'i'ewfwith; parts'g removed, Fig. 2-. is a view taken as indicated by the line 2-2 of Fig. 1, Fig. 3 is a view in perspective of a portion of one of? the side members of the stationary grate frame, and Fig. 4 is a view in perspective of one end of one of the shaking bar frames.

As shown in the drawings, 10 indicates a substantially rectangular stationary grate frame adapted to support a plurality of shaking bar frames indicated by 11, 11 and here shown as 5 in number. It is to 'be understood, however, that fewer or more of said shaking bar frames maybe embodied in a single grate,

Since the construction and operation of 3 each of the shaking bar frames with the shaking bar therein is substantially the same,

describe in detail but 0 6- stationary frame 10.

The shaking bar frame 11 issubstantially rectangular in.'-shapeand is provided with. a

series of crosshars 11 11". The cross bars 11 are provided with aligned recesses ll nd? the ends or: the framerll; are brovided with: similar recesses 11. The side members ofthe frame 1O are provided with similar recesses 11 in line with those in the shaking bar frame when the same is in. place in'the The recesses 11 11, 1:1. are adaipted to: receive the rocking or shaking .bar "12,

which is provided with a series of. sector shaped fins l2 'lyingbetweeni the cross meme bers 11 of the shaking; bar. frame. .Each of the fins 12 asstatedis sector shaped and its OUiIQTCHFVGd! edge is substantially? 09in length, Lathe rockingor shaking of the bar 12 the fins 12;move between the cross members 11 in: .a; sort. of cleaving action. That is, in therocking: of the bar, a portion of each. of the, sectors 12?, is always between thecross pieces 1'1 so that pieces of ash or this way all clogging of the gnated'uring the rockingof the barsisprevented. In other words, there is.no scissors action between the fins 12* and the cross members 111 thatis likely to catch pieces of fuel; or ash. or clinker. v

Oneach rocking bar, t'w-o of theend fins are provided with extensions as indicated by 12 to actas stops, to limit the upward rocking of the bar. There'are also connecting rods13 joined to such extensions on alternate rocking bars-and an operating rod 14: is joined to each set. Theoperating rod lt'is adapted to be reciprocated by means of'lever. 15., which. is-rocked by the manually operable handle 16. It willibe seen that when the rod 14 is pulled outwardly by means ofthe lever 15, alternate rocking grate so i bars will be rocked upwardly in the position I shown by the center and top'and bottom' bars in Fig. 2. hen the lever 15 is released the rocking bars tend to fall down by gravity into the positions occupied by the second and fourth bars in Fig. 2. Such downward movement may be limited by means of a stop 17 adapted to engage the lever 15 when it 1s 1n. 7

Each of the frames 11 is positioned or locked in the stationary frame 10 in the following manner. The side members of this frame are provided with a series of bosses or lugs 18, each having an upwardly projecting part 18* to form the two shoulders 19 and 19", the latter being undercut as shown. The corners of the frame 11 are provided with suitable recesses119 and 119 as shown, to accommodate theparts 18" on the lugs 18. fThe end of the frame 11 is put in place to rest on two of the lugs 18 with the shoulders 19 lying in the recesses 119 on the frame. The other corners of the frame are then dropped down onto the adjoining lugs 18 until the shoulders 19 are located in the recessed corners 119. In this way each of the frames 11 rests securely in the frame 10, although removal is easily permitted by raising the two lower corners tolift them off of the lugs 18, whereupon the upper corners may beiinoved out from under the overhanging shoulders 19 and the'frame 11 completely lifted out of the stationary frame 10. V i 7 As stated before, alternate rocking bar are preferably connected' by ailink 13 and each set is preferably adapted to be rocked e by means of a rod 14 and operating lever 15 In the operation of the grate, assuming thatthe rocking bars are all down, green peated.

coal is placed on the stationary plate 20 at the upper edge of the grate. The second and fourth bars from the top are then rocked upwardly and allowed to return. This substantially empties these bars from material.

The first, third, and fifth bars are then rocked upwardly as shown in Fig. Qand allowed to return. This transfers material from the first bar onto the second, from the third onto-the fourth and so on.. This leaves" the top bar substantially free from material and the green coal previously placed on the plate 20 and consequently preheated to a cerlain extent is then pushed down onto the first bar manually; The operation is then re- It will be seen, therefore, that in this" manner the fuel is gradually moved downwardly on the grate until it reaches the ash plate 21 at the bottom, from which the ashes-are dumped in the usual manner.

7 It is to be particularly noted that the sector shaped fins 12 extend downwardly some distance below the grate when the rocking bars aredown in the position shown by the second andfourth bars in Fig. 2.

This is their normal position, and in this' position it willheseen that they act as heat radiating fins, serving to assistin keeping the'rocking bars cool.

IVhile I have shown and described certain embodiments of my'invention, 1t 1s to be understood that it is'capable of many modi fications. Changes,.therefore, in the construction and arrangement may, be made j a shaft rotatably supported in the recesses-inthe cross bars-of the-removable frame, said shaft being equipped with sector-shaped fins lying between said cross bars.

'2. A grate of the character described comprising; a main supper ing frame provided with side bars having recesses therein; a smaller stationary rectangular removable frame mounted between the side bars of the main frame, said removable frame including parallel side bars with parallel spaced cross bars having aligned recesses in their upper surfaces; and a shaft rotatably supported in the recesses in the cross bars of the removable frame, said shaft being equipped with sector-shaped fins lying between said cross bars, the ends of said shaft extending be yend the ends of the removable frame and lyingin the aforementioned recesses in the side bars of the main supporting frame- In witness whereof, I-[have hereunto set my7hand this 9th day of February, A. 192 a ire. KELLY. I

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