US642497A - Dumping-grate. - Google Patents

Description

No. 642,497. Patente-d lan. 30, |900. Z. M. SLATER.

DUMPING GRATE.

(Appiicatiop filed Feb. 16, 1899.) (No Model.)

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No. 642,497. Patented lan.' 30, |900. Z. M. SLATEB.

DUMPING GBATE.

(Appu'cmon mea rep. 1e, 1899.) (No Model.) 2 Sheets--Sheet 2.

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Nrrnn STATES 'l FFICQ' ZAOHEUS MARSHALL SLATER, OF OORNWALL LANDING, NEV YORK.

DUlVlPlNG-GRATE.

SPECIFICATION forming part of Letters Patent No. 642,497, dated January 30, 1900.

Application iiled February 16, 1899. Serial No. 705 ,643. (No model.)

To LZZ whom, it mln/,y concern:

Be it known that I, ZAcHnUs MARSHALL SLATER, a citizen of the United States, residing at Cornwall Landing, in the county of Orange and State of New York, have invented anew and useful Dumping-Grate, of which the following is a specification.

This invention relates to furnace-grates; and the object of the invention is to provide a simple and efficient device of this character so constructed as to effect a saving in the fuel burned as compared with ordinary furnaces, as well as to prevent to as great an extent as possible the mixture of ashes and burning coal when the fire is cleaned, it being understood that any extensive ad mixture of the ashes and burning coals materially affects the temperature of the fire, and thereby the amount and character of the steam generated.

My improved furnace-grate includes in its COnstruction two independent grate-sections and a single frame for both of them, one of said grate-sections being mounted to tilt, and in the present case both sections of the grate are represented as being located within the frame and one of them as fixed, while the other is mounted for tiltingmovement, thereby to dump the whole or a part of the contents of the furnace, and the frame constitutes a convenient device for sustaining one of the grateseciions while separating or spacing the tilting grate-section from the furnace-wall.

In the drawings accompanying and forniing part of this specification, Figures 1 and 2 are longitudinal central sect-ions of the lower part of a furnace of ordinary construction, showing my improved grate therein and illustrating the tilting section thereof in its normal or operative and depressed positions, respectively, and also representing a simple mechanism for effecting the operation of the tilting grate-section; and Fig. 3 is a plan view of the same. Fig. 4 is a transverse section on the line 4 4, Fig. 1.

Similar characters refer to like parts in all the figures of the drawings.

.As hereinbefore set forth, my improvements include a furnace-grate consisting of two independent grate-sections and a single frame for both of them, and one of said grate-sections being mounted to tilt, and these improvements may be applied to any of the wellknown forms of furnaces without material change in the latter.

In the drawings I have represented the lower portion of a furnace, the same being denoted by A, having the usual ash-pit 2, into which the ashes are dumped, and the door 3, by which fuel is introduced into the re-box.

While the grate-frame may be of any form or material, I have represented the same as being of rectangular shape to fit snugly within the correspondingly-shaped chamber of the furnace, said frame being designated by 5, and as a convenient means for sustaining the same the lugs or ears 6, disposed in horizontal alinement along the inside of the furnace, are conveniently employed. The grate-frame 5 is usually made in the form of a cast-ing and is separated into two portions by a transverse bar 7, having an inturned flange 8, upon which and the oppositely-disposed and similarflange 9 on the end piece 10 of the frame the horizontal grate-bars 12 of the'stationary grate-sec` tion B are adapted to rest, the said grate-bars heilig held in place by any suitable fastening means. Although the bars 12 constituting the stationary grate-section are separate from the frame, it is evident that they can be cast integral with the frame, this being simply a matter of choice. v

The movable section of the grate is designated by O and constitutes, with the fixed grate-section B, a continuous surface, upon which the fire is built and maintained, said fixed section being located at the front of the furnace-wall. The movable grate-section, which is preferably mounted for tilting movement., is located at the rear of the furnace, both of said sections, as will be evident from an inspection of Fig. 3 of the drawings, being located inside of the frame.

The movable section C of the grate is represented as consisting of a frame 14, which may be a casting provided with a series of fixed bars 15 in line, respectively, with the bars of the rfixed grate-section. The gratesection C is mounted to tilt, and its axis of oscillation'is located, preferably, to the rear of its center of gravity, whereby when said gratesection is released the weight of the mass thereon will cause the same to promptly tilt.

Said grate-section O has in its opposite sidel bars openings 16, through which a transverse IOO shaft 17 passes, the opposite ends of said shaft being supported by bearing-blocks 18, fixed to the inside of the furnace.

Mechanism is provided for maintaining the tiltable grate-section C in its operative or horizontal position (represented in Fig. 1) and -which may be of any convenient character.

For this purpose I have represented two cams 19 and 19' secured to opposite ends of a rockshaft 20, carried by suitable bearings on the furnace wall, the cam 19 having a downward extension 21, to which a suitable operating device, as the link 22, connected with the lever 23, is supported, the lever 23 being located outside of the furnace and manually operable and represented as fulcrumed upon the bracket 24, secured to a convenient part of the furnace. It will be seen on inspection of Figs. 1 and 2 that the link 22 is pivoted at its opposite ends to cam extension 21 and to hand-lever 23, the connection between the link and lever being at a point intermediate the fulcrum and the free end of the latter. In Fig. 1 the grate-section C is represented as being in its horizontal position. To tilt the same, the free end of the lever 23 is grasped and the lever swung downward. This operation rocks the two cams 19 and 19 about their aXes, permitting their working faces to fall away from the front end of the grate-section C, whereby said grate section will be depressed by the weight of the superposed mass thereon, aided somewhat by the grate itself, which, it will be remembered, is supported at the rear of its center of gravity.

To restore the grate-section C to its initial position, the lever 23 is elevated until it occupies a substantially vertical position, as shown in Fig. l, the cams 19 and 19 on the operation of the lever serving to elevate the front end of the grate-section with which they roll in contact. The lever 23 and the connected parts are held in their primary positions (represented in Fig. 1) byasubstantially U -shaped gravitated keeper 25, supported upon the front wall of the furnace and adapted to drop over the upper end of the lever to hold the same in its vertical position.

In operation when it is desired to clean the fire the fireman iirst pushes the re from the front or grate section B onto the tiltable gratesection C, after which he rakes off the ashes from said front section, following which the fire which has been thrust back on the grate'- section C is moved forward, together with that which was originally on said grate-section C. When this is done, the grate-section C will be tilted in the manner before described to relieve it of the ashes. In this manner the mixture of ashes and burning coal is prevented to a great extent, thereby effecting a large saving in fuel.

Various modifications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

I do not limit the invention to the particular shape of the frame or the grates therein, for their construction can be varied in this respect to adapt them to different kinds of furnaces, and for the same reason the disposition of the cams 19 can be changed.

What I claim is- In a furnace-grate, the combination with a frame including sides and ends and a transverse bar, said bar and one end having horizontal flanges extendin g toward each other in a common plane, a fixed grate mounted upon said flanges, the sides of the frame having hangers depending therefrom, a shaft journaled in the hangers, a second grate provided with depending ears, perforations in said ears on a line at the rear of the center of gravity of the grate, through which perforations said shaft is passed whereby said grate will normally hang in a tilted position, a rock-shaft below the downwardlytilting edge of the grate, cams mounted upon the rock shaft adapted to engage and raise the grate to a horizontal position, said cams having adjacent fiat sides adapted to receive and hold the grate at different elevations, the sides of the cams which support the grate in its uppermost and lowermost positions lying, when in operation, above the center of gravity of the cams to hold the latter against displacement, means for rocking the rock-shaft, and means for holding said shaft at different points of its rocking movement.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

ZACHEUS MARSHALL SLA'IER.

Witnesses:

TowNsEND D. WOOD, ANDREW B. TAFT.

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