US394545A

US394545A - Thomas h

Info

Publication number: US394545A
Authority: US
Publication date: 1888-12-11
Anticipated expiration: 1905-12-11

Description

(Na Model.)

T. H. SEARS.

PURNAGE GRATE.

No. 394,545. Patented Deo. 11, 1888.

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UNITED STATES PATENT OFFICE.

THOMAS H. SEARS, OF HOLYOKE, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO VILLIAM JOLLY, OF SAME PLACE.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 394,545, dated December 11, 1888,

Application filed June 29, 1888. Serial N0.2'78,574. (No model.)

To aZ whont it may concern:

Be it`known that I, THOMAS H. SEARS, a citizen of the United States of America, residing in Holyoke, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Furnace- Grates, of which the following is a specification, reference being had to the accompanying drawings and letters of referencemarked io thereon.

My invention relates to furnace grates wherein the frames and bars are adjustable.

Heretofore many adjustable devices have been made but with some the adj ustmentis difficult and the parts liable to become broken and warped so as to become inoperative.

The object of my invention is to simplify the construction and operation of adjustable furnace-grates and to provide an adjustable 2o device which shall be of simple construction, easily operated, and not liable to become warped or broken, and also to provide a reversible separating-tooth for controlling the extent of separation of the grate-bars, and a tooth to facilitate the holding of the ends of the grate-bars which are set end to end in register with each other; and to that end my invention consists in the construction and arrangement herein shown, whereby l accom- 3o plish these objects.

In the accompanying drawings, in which like letters of reference indicate like parts, Figure l is a sectional edge view of one of the adjustable standards or supports, taken through line fr, Fig. 2. Fig. 2 is a side elevation of two of the adjustable supports or standards adjustably secured together. Fig. 3 is aside view of one of the grate-bars. Fig. 4 is a sectional end view of the saine. Fig. 5

4o is a plan view of the bearing-bars. Fig. 6 is a plan view of a portion of the grate complete, illustrating the relation of the parts, the separating-teeth being omitted. Fig. 7 is a side view, and Fig. 8 an end view, of the separating-teeth. Fig. 9 is a plan view of a'part of the grate, illustrating the relative position of the parts when the grate-bars are set end to end; and Fig. 10 is a side view of the same.

In detail, ay indicates the fixed or stationary 5o portion of the adjustable support or leg; d,

the movable portion of the same; e, the adjustable side arms; f, bearing-bars upon which the gratebars rest; fi, the grate-bars, and j fingers or teeth which are rested bei ween the grate-bars. 5 5

The construction is as follows: To provide for varying the height of the grate, and thus adapting the device to furnaces of different heights, the stationary parts of the legs u are provided with openings o, into which teeth or 6o projections p on the movable part d project, and these openings and teeth being downwardly inclined, as shown in Fig. l, will, when placed in position, remain as placed, and pressure upon the part (l tends to lock them more tightly together. No bolts or other fastening means are therefore required.

Although teeth of like construction, as shown upon the movable part (l, may be used on the stationary part a and alike adjustment 7o accomplished, l prefer that the teeth upon the stationary part should have openii'igs between them extending through the part a, so that ashes, &e., will readily escape, and thus avoid the clogging' which might result upon a read- 75 justment of the parts were not this clearance provided.

The bearing-bars rest upon the parts d, which are preferably provided with projections b, between which the bearing-bars fit. 8o The bearing-bars consist of either two or three parallel bars, of suitable size, arranged a short distance apart and secured at their ends. The stationary parts ct are provided with arms e, which project horizontally at their sides, 8 5 and, lying together face to face, are held in position by one or more nuts or screws passing through a slot in one and into the other, thus allowing of the parts a being moved toward or from each other, as may be required 9o to adjust the same to the furnace.

The grate-bars L' are loose, each being independent of the other, and rest with their lower edges bearing upon the bearing-bars f. The grate-bars are tapering in oross-section,being thickest at the top. The bars are separated the desired distance by the interposition of the teeth or fingers j, thestem of which rests upon the bearing-bars, and the enlargements n, resting between the bearing-bars, prevent ioo longitudinal movement of the teeth. The projecting parts Z and m of the teeth are tapered to conform to the taper of the grate-bars, the projections Z, however, being of less thickness than the projections m. When, therefore, line coal is used inthe furnace and it is desired that the bars should lie near together, then the narrower parts are turned upward and lie between the grate-bars, and when the bars are to be separated farther for the use of coarse coal then the thicker parts are turned upward.

The greatest practicable length grate-bars have been made is five feet. In long furnaces, therefore, it has been found necessary to put in two lengths of bars, allowing them to meet end to end; and therefore in such cases it has been necessary to provide two bearing-bars for each set of grate-bars, one bearing-bar being at each end of the gratebars and each bearing-bar being provided with independent teeth, which project per'-v pendicularly therefrom. By using' my separating device, however, one bearing-bar may be dispensed with, as the adjacent ends may rest upon one bearing-bar, and the lingers which extend upward at each side of the bearing-bar will extend sufficiently far from the ends of the bars to hold them separated, while if single teeth were used the contraction of the bars would leave them without contact, unless it were of such length as to interfere with the opening between the"grate bars. By the use of a double separating tooth or nger, therefore, I am enabled to hold the ends of the grate-bars in line with each other and to y dispense with the use of vone bearing-bar and the supports which it would require, and by the projecting of the teeth at two sides of the central stem and making these projections of diiferent thicknesses I dispense with the necessity of supplying an entire new set of teeth when the dist-ance of separation of the grate-bars is changed.

Having therefore described my invention, what I claim, and desire to secure by Letters Patent, is-VVV 1. In combination with a furnacegrate frame and removable bars, the reversible separating-tooth, substantially as shown'.

2. In a furnace-grate, the separating-teeth j, having two fingers which project between the grate-bars and having an intermediate stem connecting the same, substantially as shown. 3. In a furnace-grate, the adjustable supports CZ, provided with teeth, and the supports a, having recesses to receive the teeth on'the part d, substantially as shown.

ALLEN WEBSTER, WILLIAM J oLLY.

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