US371765A - Grate-bar - Google Patents

Description

(No Model.) 7 2 Sheets-Sheet 1. W. E. KELLY.

GRATE BAR.

No. 371,765. Patented Oct. 18, 1887.

k A i Hill (No Model.) 2 Sheets-Sheet 2.

W. E. KELLY.

GRATE BAR.

No. 371,765. PatentedOot. 18, 1887.

Unrrnn ATENT trio-n.

WILLIAM E. KELLY, OF NEW BRUNSWICK, NEYV JERSEY.

GRATE BAR.

SPECIFICATION forming part of Letters Patent No. 371,765, dated October 18, 1887.

Application filed July 15, 1886. Serial N0v 208,106. (No model.)

To aZZ whom, it may concern:

Be it known that I, WILLIAM E. KELLY, of New Brunswick, in the county of Middlesex and State of New Jersey, have invented a certain new and useful Improvement in Grate- Bars, of which the following is aspecification.

I will describe grate-bars embodying my improvement, and then point out the various novel features in the claims.

In the accompanying drawings, Figure l is a partlysectional side view of a gratebar embodying my improvement. Fig. 2 is a transverse section tl1ereof,taken at the plane of the dotted line :0 m, Fig. 1. Fig. 3 isa transverse section of the same, taken at the plane of the dotted line 3 3 Fig. 1. Fig. 3* is a plan of a grate-bar embodying my improvement, with the leaves removed. Fig. 4 is a partly-sectional. side view of a grate-bar, slightly modilied in form, embodying my improvement. Fig. 5 is a transverse section of the same,taken at theplane of the dotted line 2 2, Fig. 4. Fig. 6 is a transverse section of the same, taken at the plane of the dotted line 12 c, Fig. 4. Fig. 7 is a partly-sectional side view of a grate-bar of modified form embodying my improvement. Fig. Sis a transverse section of the same, taken at the plane of the dotted line it, Fig. 7. Fig. 9 is a transverse section of the same, taken at the plane of the dotted line a a, Fig. 7.

Similar letters of reference designate corresponding parts in all the figures.

Referring first to the example of my improvement shown in Figs. 1, 2, 3, and 3*, A designates a grate-bar composed of two portions, a c, extending side by side a short distance apart and connected to end pieces, a from which extend trunnions (a when the grate-bar is to be made (-apable of rocking. There is a space between the portions a a of the bar,which is open at the bottom of the bar and also at the top; hence air may circulate freely upward through the bar. The portions to c a a of the bar are made integral. The inner surfaces of the portions c c converge upwardly, so that the space between these portions is narrower at the top than below, excepting near one of the end pieces a, where the surfaces of said portions are made parallel, or substantially so, for a short distance, as shown more clearly in Fig. 3*. i

B B designate a series of leaves,which are applied to this grate-bar and form the surface upon which the fuel is supported. Some of the leaves B have continuously-curved orarcshaped top surfaces, while others of them have top surfaces composed of flat central portions and arc-shaped portions extending therefrom. They are all narrow and arranged to extend transversely to the length of the bar A. From the center of these leaves extend downwardly shanks b. The shanks b of the leaves B have their sides converging upwardly, so as to correspond with the convergence of the portions c a of the bar A. These leaves are provided on one side with lugs b b b" I)", which form spacing-pieces, keeping them separated at the de sired distance. These leaves may be applied to the barA one at a time byinserting the shank Z) between the-parallel surfaces of the portions a a of the bar, and when the leaf is inserted as far as it can go the leaf is moved lengthwise of the barA,so that its shank will occupy the space between the converging surfaces of the portions a c of the bar. Then it cannot be drawn out by an upward movement, as the shanks are in eifect interlocked with the bar. After all of the leaves have been applied in this way except the last one, B, the latter has its shank inserted between the parallel surfaces of the portions a a, and then it will preclude any movement of the other leaves, 13, lengthwise of the bar A. A pin, 0, inserted through the portions to c of the bar A above the lug b of the leaf B, prevents the detachment of the latter by an upward movement.

The lugs b b b" are somewhat peculiar in their form and arrangement. The lug b is triangular, so that it will shed ashes falling on it. The lugs b b" are arranged a short distance below thelug I). They, however, extend partly under it and partly beyond it, and are arranged with a considerable space between them. The lugs b are quite narrow; hence they do not obstruct the upward circulation of air between the portions a a of the bar A. Air ascending through these spaces may pass out between the top of the bar A and thelugs b b, and also between the lugs b b' and the lug b". The lugs b b are so wide apart that they extend over the portions to c of the bar A. They will preferably be inclined from the inner sides to the the one previously described, except that the space between its portions 0, a is open at one side of the bar, instead of at the bottom of the bar, one of the said portions a a being longer than the other. The bar A in this example of my invention also differs from the one first described, in that its portions a a diverge upwardly, instead of converging in that direction. The leaves B B are very similar to those previously described. Their shanks, however, taper downwardly, and have at the lower extremity a lateral extension or hook, b At one end of the portion a of this grate-bar it has a vertical groove, a. Each of the leaves 7 B when applied to the grate-bar has its shank inserted through the space between the portions a a of the bar A, and at a point where the portion ahas the groove a. It is then moved lengthwiseof the bar, whereupon its lateral extension or hook I; extends under the portion a of the bar A. It is then engaged so that it cannot be withdrawn by an upward movement. The leaf B, which is last in serted, is retained in place by a pin, 0, inserted through the portions a a of the bar A above the lug b of the leaf B. Air may circulate through this grate-bar and between the leaves, as in the other example of my improvement The grate-bar A, which I have shown in Figs. 7, 8, and 9, has its portions a a close together near the top, but extended farther apart below. These portions a a have below them a portion, a. This bar A, therefore, has not an opening extending upwardly through it and open both at top and bottom, it being open at the top only. This grate-bar may be made of one piece or it may be made in two sections, one having end flanges which extend over the ends of the other and are provided with the trunnions, rivets in this case being inserted through the sections below the space which is between the portions a a so as to secure said sections together. The leaves B B in this example of my improvement may, as far as'their top surfaces are concerned, be of the same shape as those previously described. They differ, however, in other respects from the leaves previously described. Their shanks are or may be parallel-sided for a considerable distance, but at the lower extremity are enlarged laterally, as here shown, in circular form.

At one end of the grate-bar A it has grooves a in its portions a a Each of the leaves B is applied to the bar by having the lower end of its shank slipped through the grooves a, and afterward it is moved lengthwise of the bar, so that the enlarged lower end of its shank will fit in the wide lower part of the space between the portions a a of the bar A. When in place it cannot be detached by an upward movement. The last leaf, B, has a shank of different shape from the shanks of the leaves B. It is approximately of the same width throughout as the lower portions of the shanks of the leaves B. It will fit snugly between the grooves a". A pin, 0, inserted through the portions a a of the bar and through the shank of the leaf B, or above a projection on such shank, secures the leaf B in place. As the latter precludes any movement of the leaves B lengthwise of the bar, they are also secured. v I

In all the examples of my improvement the bar A may have an arched longitudinal bottom or be of any desired shape, so long as it has the peculiar characteristics previously de scribed. In the examples of my improvement shown in Figs. 4., 5, 6, 7, 8, and 9, as well as in the example shown in Figs. 1, 2, and 3, its portions a a may be braced at intervals by webs or ribs. 7 It will be seen that by removing the pin 0 from any of the grate-bars the leaves B held in place thereby may be detached, and that afterward by moving the leaves B one at a time toward that part of the bar Awhere the leaf B was previously located said leaves may be detached from the bar A. Provision is therefore afforded for renewing any leaf or leaves, as occasion may require.

The bars A and leaves B B may be made of cast-iron or other suitable material.

What I claim as my invention, and desire to secure by Letters Patent, is-'- 1. The combination, with a gratc=bar comprising two longitudinal portions extending side by side and so constructed that for a portion of their lengths a space of varying width is formed between them, and for another portion of their lengths ajspace approximately the same width is formed between them, of leaves provided with shanks having opposite sides of approximately the same shape widthwise as the space first named and adapted to be moved downwardly through the space last named, said bar being provided with end portions and trunnions formed integral with thelongitudinal portions, substantially as specified.

2. The combination, with a grate-bar comprising two longitudinal portions extending side by side and so constructed that for a portion of their lengths a space of varying width is formed between them, and for another portion of their lengths aspace of approximately the same width is formed between them, of leaves provided with shanks having opposite sides of approximately the same shape widthwise as the space first named and adapted to ICC be moved downwardly through the space last tions and provided with lugs above thelonginamed and moved along so as to interlock tudinal portions of the bar, arranged slightly with the bar, said bar being provided with apart, but so that they will jointly cover the end portions and trunnions formed integral space between said longitudinal portions of 5 with the longitudinal portions thereof, subthe bar when theleaves are fitted thereto, sub 15 stantially as specified. stantially as specified.

3. The combination, with a grate-bar hav- WILLIAM E. KELLY. ing longitudinal portions extending side by Witnesses: side, of leaves having shanks adapted to fit in D. H. DRIsooLL,

IO the space between the said longitudinal por- J. R. BOWEN.

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