US242691A - Jambs d - Google Patents

Description

(No Model.)

J. D.,PIERGE. Stove Grate.

No."242,691. Pat e nte djune 7,1881.

UNITED STATES PATENT OFFICE.

JAMES D. PIERCE, OIj MILWAUKEE, WlSGONSIN, ASSIGNOR TO BUTCHER & VOSE, OF SAME PLACE.

STOVE-G RATE.

SPECIFICATION forming part of Letters Patent No. 242,691, dated June 7, 1881.

Application filed March 15, 1581. (No model.)

To all whom it may concern Be it known that I, JAMES D. PIERCE, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Stove-Grates, of which the following is a specification.

I have improved the grate in which concentric rings are adapted to be oscillated independently upon a center pin, or altogether upon the grate-support. My object is to provide means by which the independent rings are maintained in proper relation and avoid binding upon the center pin, the function of which is merely to hold the rings together upon the grate-support. The several rings are arranged in the same horizontal plane, and they are provided with circular collar-bearin gs adapted to intermatch with each other, the outer ring being supported by such a collar within a recess in the grate-supporting bar. This construction gives the advantage of a center bearing for each ring independent of the confining-pin, and it is this arrangement of center collar-bearings, in connection with a grate-support depressed between its journals,

that allows the rings to be supported with their upper surfaces in the same horizontal plane.

Referring to the accompanying drawings, Figure 1 represents a top view of my improved grate; Fig. 2, a vertical cross-section of the same, and Fig. 3 the several rings and the support separated and in section to show more particularly the collar-bearings of each.

The outer ring or bar, A, is formed with a central part, a, connected bytwo or more arms, I) b, giving the form of a skeleton-dish, and upon which the central and intermediate rings are supported in concentric relation. The intermediate ring, 0, has a central part, d, connected by slightly-dished arms a, and the center ring, f, has a hole, 9, corresponding with holes g" g in the central parts of the outer and intermediate rings for the pin h, by which they are loosely secured upon the support and in such manner that the center and intermediate rings are free to be turned independently or all together by the outer ring, to clear the grate at the middle or at the circumference, and alike at every part. The intermediate ring is supported so as to be turned free of the arms of the outer ring, and the central ring is supported free of the arms of the intermediate ring, while the outer ring is supported free of contact with the journal ends of the support for the grate. The support j is adapted for being turned upon journals kk, and for this purpose has the usual dumping-arm, I. It is formed with a recess, m, and a circular shoulder, m, to receivea corresponding collar-bearing, n, on the under side of the center part, a, of the outer ring, while the upper side of said central part, a, has a recess and circular shoulder, a, to receive a corresponding collar-bearing, r, on the under side of the center part, d, of the intermediate ring.

The central rin g has an under circular collav-bearing, f, fitting into a corresponding shouldered recess, 0, on the upper side of said intermediate ring. This construction gives to each ring a separate collar-bearing around the The edges of the rings are formed with projections s, to aid in clearing the spaces and cutting out clinkers, while openings 2; are formed in the rings to give the proper draft and aid in freeing the grate of ashes.

The rings are provided with eyes 20, by which they are oscillated.

The grate-supportj is depressed between its journals 7c is, and the collar-bearin g parts of the rings are set one within the other, to bring the riu gs in the same horizontal plane and the outer ring clear of the journals of the grate-support.

I do not claim, broadly, a grate of independent concentric rings adapted to be oscillated separately or all together and provided with radial projections in the spaces between the rings; but in such a grate my improvements embrace matters of construction and combination which render the grate more desirable and better adapted for the free operation of the independent grate-forming rings.

I claim- 1. The independent concentric rings A of and their support,each formed with interm atch ing collar-bearings concentric with and independent of the grate-confining pin, substantially as described, for the purpose specified.

2. The combination of the grate-supporting bar having a circular shouldered recess, m,with a series of independent concentric rings, the outer one, A, having an under bearing-collar, a, corresponding with said recess, and the intermediate one, 0, having an under collar-bearing, r, and an upper circular shouldered recess, 0, interrnatching with corresponding parts of the center ring, f, and of the said outer rings, substantially as described, for the purpose specified.

3. The grate-support depressed between its journals and hayin g a circular shouldered recess, and the center bearing parts of the outer and the intermediate rings formed relatively below the plane of said rings, whereby to bring the intermediate rings on the same horizontal plane with the outer ring and the latter free of contact with the journals of the grate-support, substantially as described.

4. The grate herein described, consisting of the independent concentric rings formed with intermatching collar-bearings, the grate journaled support having a shouldered recess for the collar-bearing of the outer ring and a confining-pin independent of said collar-bearings, the said rings being formed with edge projections and supported by said interrnatchin g collar-bearings, with their upper surfaces in the same plane, substantially as described, for the purpose specified.

In testimony whereof I have hereunto set my hand in the presence of two subscribing. witnesses.

JAMES D. PIERCE.

Witnesses:

PETER KREMERS, CHARLES N EUBAUER.

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