US1293417A - Shaking-grate. - Google Patents

Description

E. c. HAFER.

Patented Feb. 4, 1919.

EDWARD C. I-IAFER, 0F CHAI'IIBERSBURG, PENNSYLVANIA.

SHAKING-GRATE.

eeann.

Specification of Letters Patent.

Pat-er ted lFeb. 4t, 1919.

Application filed January 6, 1917. Serial No. 140,964.

To all whom it may concern:

Be it known that I, EDWARD 0. Hanna, a citizen of the United States, residing at Chambersburg, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in SliakingGratcs; 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.

This invention relates to improvements in furnaces of the rocking or oscillating bar type, and pertains more particularly to the construction of bars, method of mounting thereof, and manner of support of the grate.

An object in view is the eiiective avoidance of interference between bars and the prevention of danger of dislocation of any of the bars by anchoring certain of such bars.

A further object is the protection of the grate carriage, and an additional object is the adaptation of the grate for assuming various elevations.

With these and further objects in view, as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subsequently specified and claimed.

In the accompanying drawings,

Figure l is a perspective view of a grate embodying the features of the present invention.

Fig. 2 is a fragmentary, vertical section taken approximately on the plane indicated by line 2? of Fig. 1.

Fig. 3 is a similar view of a lied embodiment.

Fig. 4 is a fragmentary, vertical section taken vertically through one of the supporting legs of the grate.

Referring to the drawing by numerals, 1 indicates the furnace front provided with the usual lever mechanism 2 connected by links 3 and 4 with operating levers 5 for rocking the grate bars 6, 6. Each of the grate bars 6 is formed between its end portions 6 and the main body of the bar with a cylindrical portion or journal 7 finding bearing in an upstanding portion 8 of the grate carriage 9, there being, of course, two grate carriages 9, although one is obscured in the drawing by the presence of the grate bars. Each carriage 9 is provided with an slightly modiupwardly extending portion 8 for each grate bar, and some of said u nvardly extending portions are provided with vertical recesses of relatively shallow depth for forming a bearing for the journal 7, as indicated in llig. 2. Other of said upwardly extending portions 8 are provided with considerably deeper notches, as indicated at 10 in Fig. l, for forming the bearing for the journal 7 of the respective grate bar, the said journal 7 in; that instance being formed at a lower portion of the respective bar 6 than in the instance seen in. Fig. 2, and for convenience of reference the arrangement of journal 7 seen in Fig. 2 will be referred to as upper while that seen in the notch 10 will be referred to as lower.

It is preferable to provide upper and lower journals alternating so as to permit proper clearance, and the desired rocking of the bars during actuation by the lever mechanism The depth of the lower journals in the carriage is such that there is practically no liability of the bars having such journals becoming dislocated, but difficulty has been experienced with the bars having the uppenjournals from such bars becoming dislocated, and to avoid this difficulty, I employ a U-shaped strap 11 for each of the upper journals, the strap being riveted or otherwise appropriately fixed at its ends to the upstanding portions 8 of the carriage and extending over the respective journal 7 between the plane of the outer face of the carriage 9 and the inner edge of the portion 6 of the respective bar. These straps may also be employed on the lower journals, if desired, but usually retention of the upper journals is ample for assuring maintenance of the grate bars in proper operative position.

In Fig. 3 is seen an instance of the U- shaped strap 11 retaining the lower journal in position in its bearing in carriage 9.

Each grate bar 6 has its upper edge tapered and protected by a series of laterally spaced fuel-sustaining segments or leaves 12, each having lateral lugs 13 spacing it from its next adjacent leaf throughout the length of the bar except at the ends. At each end of each bar is arranged a leaf 14: which differs from the leaves 12 in that each leaf 12 consists of a bifurcated plate having its legs extending on opposite sides of the grate bar and being held in position thereby, whereas the leaf 1% consists of two such 1 9 with serratlons plates spaced apart and connected by an intervening Web 1 1 formed with a flanged portion 14: corresponding in contour. to the upper portion of any one of the leaves 12. The space spanned by the web 1 1 is sufiicient for accommodating the carriage 9 height of a grate after the grate has been delivered, and with the ordinary grate the labor of reducing the height is almost prohibitive and the result of an effort to elevate the grate is seldom satisfactory. To make possible the adjustment of the height of the grate with a minimum amount of labor and in a satisfactory and workmanlike manner, I have provided the legs 15 of the carriage 16 in their outer faces engaged by serrations 17 in the inner faces of adjusting blocks 18, the blocks 18 be ing held in position by bolts 19, 19, passed through slots 20, 20, formed in the respec- Gopies of this patent may be obtained for five cents each, by addressing the tive legs 15 and blocks 18. Thus when it becomes necessary to lower the grate, it is also necessary to loosen the bolts 19, shift the blocks 18 upward, and again tighten the bolts. A. reverse operation is all that is necessary for elevating the grate.

What I claim is The combination with a grate carriage, of a grate bar having a journal adjacent its end, and an end portion outside of the journal, the journal finding a bearing in the carriage with the end portion spaced out- Ward from the carriage, retaining means engaging the journal and carriage, and a protecting fuel-sustaining leaf mounted on the grate bar and of suiiicient area longitudinally of the bar to extend from the plane of the inside face of the carriage to the outer extremity of the bar for spanning the journal and its retaining means and having legs pendent on the opposite e sides of the bar at both sides of the carriage.

In testimony whereof I afiix my signature in presence of twowitnesses.

EDWARD G. HAFER. Witnesses:

EDGAR M. KITOHIN,

O. H. FESLER.

Commissioner of Patents,

Washington, D. C.

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