US503699A - Grate for stoves - Google Patents

Description

(No Model.) l y H. GRAEF.

` GRATE POR STOVES, 8vo.

Patented Aug. 22, 1893.

c M A., e ,v ,o A M e m .d u .c e .d l m .Q i f6 1. f C ha@ l f zman/ Qing/4 R21/Ente:-

Unire STATES PATENT Frio.

HERMAN GRAEF, OF ALBANY, NEV YORK.

GRATE FOR STOVES, 80C.

SPECIFICATION forming part of Letters Patent No. 503,699, dated August 22, 1893.

Application filed February 3, 1892. Serial No. 420,149. (No model.)

To all whom it may'concern:

Beit known that I, HERMAN GRAEF, a citizen of the United States, residing at Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Grates for Stoves, Ranges, and Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvementsin grates for stoves, ranges vand furnaces; and it consists of the combinations of devices and elements hereinafter particularly described, and specifically set forth in the claim.

The objects of my invention are to provide for use in stoves, ranges, and furnaces, a grate formed by a main grate section, which is loosely mounted by its end portions on a shaft which is supported in suitable bearings provided in the grate frame, and a sub-grate section which is so connected with the said shaft, on which said main grate section is mounted, as to be oscillated, at will, without oscillating said main grate section,forloosening the ashes and clinkers supported by said main grate section, and be made, at will, to tilt the said main grate section for dumping the same; and also to provide specific means by which my invention may be embodied in grates. I attain these objects by the means illustrated in the accompanying drawings forming a part of this specification in which-- Figure 1 is a plan view of a grate embodying my improvements. Fig. 2 is a view of the same taken in the transverse at line l-l in Fig. l; and Fig. 3 is a section taken at line 2--2 in Fig. 1.

The same letters of reference refer to similar parts throughout the several views.

In the drawings A is the re box which may be made of metal or re brick or both combined.

B is the grate frame which is preferably made to consist of a singleppiece, though it may be made in sections, and may be made with any form of construction as may be calculated to adapt it for use in the stove or furnace to which my invention is to be applied.

C is the main grate section composed of the side bars c c, end bars c c and the series of cross bars c2 c2 all preferably integral, and composing a single piece. The cross bars c2 c2 connecting by their ends with the side bars c c are made preferably with the form shown in Figs. 2 and 3; that is to say, the middle portion of these cross bars c2 c2 are made with a convex bent form, while their portions, between the said side bars and said convex portion are made with concave bent form.

E is the sub grate section which is composed of a series of lingers or bars, preferably slightly concave on their upper sides, and an oscillating shaft as shaft D, preferably integral with said radial bars or fingers e e so as to constitute a single piece.

Provided with the end portions of the grate frame B are bearings a o, Figs. 1 and 3, which are sunken below the plane of the lower side of the main grate section and in which the ends of the shaft D, of the sub-grate section, is loosely mounted, so that said shaft and its connected radial bars or lingers e e may be freely oscillated at will.

At near one end of the shaft D is provided an enlarged or annular projection d intervening between an end portion c of the main grate section, and a cross bar c2 neighboring said end portion c' forpreventing,r said subgrate section E from shifting endwise in relation to the main grate section. A stop l), Fig. 3, connected with the lower side of the grate frame B, prevents the heavier half portion of the main grate section C from dropping down. A squared or catching end d2 is provided on said shaft D, for receiving or holding with a suitable wrench or lever for oscillating the same, and the radial bars or fingers e e of the grate section E connected with said shaft.

Projecting from the lower side of theend bars c c', of the main grate section C, are bearingspb b2 preferably integral with said end bars c. These bearings b b2 receive the shaft D of the sub-grate section E, as illustrated in Figs. l and 2, and retain the series of cross bars c2 c2, at their middle portions, on

a plane relatively above the said shaft, so

that the latter will be substantially free from contact with the said cross bars of the main grate section, and thereby preserve the said shaft substantially out of contact with the fire above the grate.

TOO

Provided between two of the cross bars c? c2., of the main grate section C, or between one of the end bars c and its neighboring cross bar c2, is the catching piece d, shown in full lines in Figs. l and 3, and indicated by dotted lines in Fig. 2.] This catching piece is preferably made integral with bars Ae. and c2, as;

shown in Fig. 1, and is out of contact with the radial bar or finger e when both Athe main l grate section C and the sub-grate section E are in horizontal positions as shown in Fig. 2,

and allows the said sub-grate section lto be oscillated alternately, in opposite directions, t

sub-grate section is continued, the finger or bai' e, beneath said piece cl, will co-act with `the latter to throw the front side portion of the main grate section downwardly, as illustrated in Fig. 3and thereby dump the same, v when the materials on the grate bed will readily slide downwardly and ed.

If preferred, there may be provided at vthe outeredges of vthe bars c c, of the main grate section C, short projections c3 e5., integralwith said bars and extending to within ashort disg tance from the grate frame B as shown. l

By myabove described improvements, the main grate section v'may be allowed to remain Q in ahorizontal position for any desired length l of time, while the bars of the sub-grate seetion -inay .be oseillated, at will, vfor so loosening the ashes and clinkers, as to cause them, in a large measure, to fall down between the bars c2 c2 of the main grate section. The shaft D is, at all times, preservedfrom contact with the fire, so that it will not become bent or warped; and, by a suitable length of movement of the sub-grate section past a vertical line, the main grate may be readily dumped. v

I-Iaving described my invention, what I claim, and desire to secure by Letters Patent, 1s

Inra grate for a stove, range or furnace, the combination with the grate frame B, provided with vthe stop b and the bearin-gs a a, a main grate section C composed of bars c c and c2, as described, and provided with catching piece d, and the downwardly projected bearings b b2, of the sub-section E, composed of shaft D, and radial bars e all below the said main grate section, Athe said shaft being supported inthe said bearings va, caofI the grate frame, and rolling in 'bearings b b2 provided with the main grate section, and having an end thereof provided with means for engaging with an operating lever, all substantially as and for the purposes set forth.

In testimony that I claim Vthe invention above set forth I aix my signature in presence of two witnesses.

HERMAN GRAEF.

Witnesses: i

CHARLES .SELKIRL A. SELKIRK, J r.

Images