US373875A - allyn - Google Patents

Description

(N; Model.) r v I zsheets-sneei 1. J. H. ALLYN 8: H. P EVANs.

a FIRE GRATE.

- No. 373,875. v Patented Not-29, 1887.

(NoModelJ zsneets-sheet 2., ALLYN & H. P. EVANS.

FIRE GRATE. N0. 373.875. Patented Nov; 29, 1887,

UNITED STATES ATENT- OFFICE.

JOHN H. ALLYN AND HAMMOND P. EVANS, OF VVHITESBOROUGH, NEW YORK.

FIRE-G RATE.

SPECIFICATION forming part of Letters Patent No. 373,875, dated November 29, 1887.

Application filed March 28, 1887. Serial No. 232,807. (No model.) I I To all whom it may concern.-

Be it known that we, loHN H. ALLYN and HAMMOND P. EVANS, citizens of the United States, residing at Whitesborough, in the county of Oneida and State of New York, have invented a new Fire-Grate, of which the following is a specification.

Our invention relates to improvements in fire-grates in which a cutoff operates in conjunction wit-h a grate.

The objects of our improvements are to provide, first, a means for retaining fuel in afirechamber while removing cinders and ashes during combustion; second,to provide a means for dispensing with shaking, thereby avoiding the packing of the .coal in the fire-chamber,

third, to afford a means for rapidly discharging the contents of a fire-chamber. These objects are accomplished by the mechanism shown in the accompanying drawings and hereinafter fully described.

Figure 1 is a longitudinal sectional view,on the line a: roof Fig. 2, of the grates in their normal positions. Fig. 2 is a top plan view of the grates in their normal positions. Fig. 3 is a sectional view on line 22 of Fig. 1, showing the position of the cam when the grates are in the positions shown in Figs. 1 andt2. Fig. ais an end elevation. Fig. 5 is a sectional view on line'z z of Fig. 1, showing the position of the cam and the cut-off when removing the cinders and ashes; and Fig. 6 is also a sectional view on the line 2 z of Fig. 1, showing the position of the cam and the two grates when discharging the entire contents of the fire-chamber.

The grates and the mechanism operating them are embraced in a frame, A, which consists of front and back serrated-bars, B, fastened at each corner to two end frame plates, which are provided with central bearings for holding the journals of the cut-off and with upper bearings for holding journals of the grate. The cut-off consists of a curved plate, D, either grated or plain, and two ends, E.

The curved plate is attached to the rims of the ends, each end having an opening in the form of a cam as shown in Fig. 3. This opening (or rather cam) G is adapted to contain and operate lugs F, and thereby control grate O. The

ends E are also provided with journals, which rest in central bearings in end frame-plates, A, one-journal projecting through the plate and the stove, range, or furnace for the purpose of attaching a lever. The lug H isa p'rojection on the rim of one of the ends E, formed as shown in Fig. 6.

The grate G, as shown in Figs. 2 and 3,con-

sists of a curved barred casting having end plates, J, Fig. 6, attached thereto, which conform in shape to the under side of the curved plate D and upper side of grate O, and are provided on their outer faces with lugs F and journals extending from the center thereof. The end plates, J, hold and support grate C and protect lugs Fand cams Gfrom ashes and the action of the heat. The lugs F are so formed as to be operated upon by the impinging of cam G, the journals resting in upper bearings in end plates of frame A.

The gravity-stop I, of the form shown in Figs. 3, 5, and 6, when intended to be operated from the outside of a stove, range, or furnace, is held on a spindle supported by a lower bearing in end plate of frame A, and passes through a door or side of range, as may be found most convenient. When intended to be operated from the inside of the stove, range, or furnace, it may be held on a spindle projecting from the inner face of end plate of frame A.

Operation: The grate O, in position for re taining fuel, rests horizontally with the bottom of the fire-chamber, the cut-off D being back of said grate and approximately at right angles thereto, with its toothed edge slightly below the back edge of grate C and serrated edge of the back bar of frame A, as shown in Figs. 2 and 3, the lever being in the position shown in Fig. 4. To remove cinders and ashes the lever is moved forward, imparting a corresponding movement to the cut-off D, which is forced through the ashes and cinders and over the grate O and to the serrated edges of the front bar of frame A. The cam G, in contact up to this turn down on itsjournals, as shown in Fig. 5, emptying the ashes and cinders into the ashpan beneath. A reverse movement of the lever returns the grates to their normal positions, as shown in Fig. 3. To discharge all the-contents of a fire-chamber the gravity-stop is released from the lug H and the lever is moved backward, so as to permit the cutoff D to change its position, as indicated by dotted lines in Fig. 6. By this movement the position of the cam G is so changed as to release the lug F and allow the grate O to turn down, and by the grate and cut-off resting nearly underneath the back serrated bar of frame A and approximately perpendicular to the the chamber almost the entire grate-space of the chamber is left open for the immediate discharge of its contents. To return the grates to their normal positions a slight forward movement of the lever turns the cnt-off in that direction, bringing the cam G in contact with the lug F, rapidly elevating the grate G to a horizontal position. The lug H, passing over and stopping against the gravity-stop I, leaves the grate and cut-off in their proper positions for retaining fuel.

What we claim as our invention is- 1. In a stove, range, or furnace, the combination, with the firecliamber, of a journaled grate normally horizontal therein, and ajournaled cut-off adapted to be rotated between an approximately-vertical position below said grate and an approximately-horizontal position above said grate, said grate being pro-. vided with a lug rigidly fastened to one of its ends and said cut-off with a cam impinging on said lug, whereby the position of the cut-off determines the position of the grate, substantially as and for the purpose set forth.

2. In a stove, range, or furnace, the combination, with the fire-chamber, of a grate journaled and normally horizontal therein, a cutoff journaled in the fire-chamber and susceptible of rotation within predetermined limits, and an adjustable stop adapted,when in operati ve position, to arrest the rotation of the outoff in one direction before reaching its fixed limit, said grate being provided with a lug rigidly fastened to it andsaid out-off with a cam impinging on the lug, so as to drop the grate from its normal position when the cut-,

off is at either of its predetermined limits, but to hold the grate in its normal position when the cutoff is at neither of said limits, substantially as and for the purpose set forth.

3. The combination, with the firechamber, of the journaled grate 0, having a lug. F, rigidly attached to one of its ends, and thejournaled cut-off D, having in its corresponding end a cam, G, impinging on the lug F, the extremities of said cam being enlarged, so as to permit the rotation of the lug and the dropping of the grate, and the intermediate portion of the cam being contracted, so as to hold the lug in a fixed position, whereby the grate is held horizontal, substantially as and for the purpose set forth.

4. The combination of the grate 0, having the lugs F, the cut-off D, having the cam G and lug H, and the gravity-pawl I, adapted to limit the rotation of the cut-off in one direction, substantially as and for the purpose set forth.

JOHN H. ALLYN. HAMMOND P. EVANS. Vitnesses:

JAMES K. PARKER, W. H. WHITE.

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