US1321858A - Island - Google Patents

Description

C. D. STARR.

STOVE GBATE.

APPLICATION FILED JUNE 1. 191a.

Patented Nov. 18, 1919.

a aiaiaaiaaw m :2:

7 I. i AM 5 lilfllllil" l V/ TN/iSSES rrm) srATEs PATE CLARENCE D. STARR, OF PROVIDENCE, RHODE ISLAND, ASSIGNOB, '10 BARSTOW STOVE COMPANY, OF PROVIDENCE, RHODE ISLAND, A. CORPORATION OF RHODE ISLAND.

STOVE-GRATE.

Specification of Letters Patent.

Patented Nov. 18, 1919.

Application filed. June v, 1919. Serial No.302,4=62.1

1/ b all whom it may concern:

Be it known that LHOLARENGE D. STARR, of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Stove-Grates; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

Mypresent invention relates to stoves and more particularly to grates therefor and it has for its object to provide an improved form of grate and grate bar that will prop-- erly support a bed composed of either large or small coals and that will effectively separate and dump ashes at the bottom of'the bed without unduly agitating the latter or causing it to cave or follow the ashes through. A further object of the invention is to provide a grate bar that will not jam and that will be effective in breaking up and passing clinkers. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure l is a top view of a grate con structed in accordance with and illustrating one embodiment of my invention;

Fig. 2 is a transverse sectional view there through and through the fire pot of a stove with the grate bars in normal position;

Fig. 3 is a similar view showing the operation of the bars, and

Fig. 4 is a similar view of a modified coupling of the bars.

Similar reference numerals throughout the several views indicate the same parts.

Features of the invention are applicable to stoves, ranges and furnaces, but I have illustrated in the present instance, a grate for ranges comprising a frame 1 having bearings at 2 and 3 for the trunnions t and shafts 5 of two parallel grate bars 6. The bars are symmetrically formed and each comprises a pair of oppositely arranged blades 7 of the same diameter, each of which blades has a headed portion 8 formed by undercut portions 9 at the sides that produce oppositely faced hook-shaped cutters. Similarly oppositely arrangedblades 1O located intermediate the blades 7 so as to alternate therewith are of a reverse conformation, that is, they taper toward their outer ends instead of being enlarged. Such groups of blade elements are repeated in the construction along the length of each grate bar, in the usual manner and as shown in Fig. 1. The shafts 5 of the bars carry intermeshing gears 11 so that the bars are connected to move in unison and in opposite directions or toward each other when either is turned as by the usual crank (not shown) applied to the squared end 12.

With the bars in the positions of Figs. 1 and 2, the coals rest largely upon the blades lOand part of the ash forms a pocket between the blades 7. When the bars are rotated, these last mentioned blades travel toward each other, as shown in Fig. 3, and pinch off the ash pocket while the blades 10 that are juxtaposed, reccde from each other and allow the ash to fall through. The hook-shaped portions or cutters on the heads 8 operate to divide or crush any clinkers that may be present, while the laterally arranged tapered blades 10 agitate the lateral pockets of ash near the bricks 13 and if clinkers are present here, they are lifted and rotated into position to be engaged between the next succeeding pair of blades 7. The amount of ash that can be pinched oil in this manner is considerable and yet at no time is a very large opening left between the grates that could seriously disturb the bed of coals above.

Substantially the same action takes place if the bars are rotated in the opposite direction away from each other, except that the cutters on the heads are forced toward the bricks instead of toward each other. If desired, the bars may be left independently movable with the gears 11 omitted, in which case only half of the ash pocket would be removed at a time by a given blade. Any number of grates may be used, of course, according to the size of the [ire box. Enough space is left at all times between the blades for fine ash to fall between, though the fuel is prevented from doing so in whatever po sition the grates are left. For such reasons. the grate bars are particularly useful when no gearing is used and each is free for inde' pendent movement.

I claim as my invention:

1. A grate bar embodying oppositely an ranged blades having undercut headed portions forming opposltely faced hook shaped cutters in combination with intermediate fuel supporting m m ers extending laterally beyond the headed portions of the blades.

2. A grate bar embodying oppositely arranged blades having undercut headed portions in combination with oppositely arranged intermediate blades tapered toward their outer ends.

3. In a grate, the combination with two parallel grate bars each embodying oppositely arranged blades having undercut headed portions and oppositely arranged intermediate blades tapered toward their outer ends,'0f gearing connected to move the grate bars in unison toward each other While maintaining their respective pairs of correspondingly shaped blades at the same angle to the plane of the grate.

CLARENCE D. STARR.

Images