US1068811A - Furnace-grate. - Google Patents

Description

C. F. NEWPORT.

FURNACE GRATE.

APPLICATION FILED JUNE 19,1912.

1,068,811. Patented July 29, 1913.

2 SHEETS-SHEET 1.

COLUMBIA PLANOQRAPH C0-. WASHINGTON. D. :1

C. F. NEWPORT.

FURNACE GRATE. APPLIOATION FILED JUNE 19, 1912.

2 SHEETS-SHEET 2.

COLUMBIA PLANOGRAPH col. y/ismua-rou. n. c,

'CHAItLES IF. NEWPORT, or CH CA O, ILLINOIS.

FTIRNAGE-GRA'IE.

Specification of Letters Patent.

Patented July 29, 1913.

Original application filed May 15, 1911, Serial No. 627,200. Divided and this application filed June 19, 1912. Serial No. 704,585.

To all whom it may concern:

Be it known that I, CHARLES F. Nnwrom, a citizen of the United States, and a resident of Chicago, in the. county of Cook and the 5 State of Illinois, have invented certain new and useful Improvements in Fu'rnace- Grates; and I do hereby declare that the following is a full, clear, exact description 5 thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part 5 of the specification.

This invention relates to improvements in grates for furnaces, and the invention is herein shown as applied to the furnace of a domestic water heater or steam generator.

Among the objects of the invention is to provide an improved grate with means for clearing the same of ashes and clinkers, and with means for agitating the fuel bed to induce combustion, and for dumping the fire bed to the ash pit below; and the invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims.

In the drawings;Figure 1 is a transverse vertical section on the-line 11 of Fig. 2, the same being taken in a plane between adjacent heater sections at one side of the figure, and through one of the heater sections at the other side thereof. Fig. 2 is a vertical section on the indirect line 22 of Fig. 1. Fig. 3 is a detail sect-ion on the line of Fig. 1. i

The general construction of the heater is the same as shown in my pending application for U. S. Letters Patent, No. 627,200, filed May 15th, 1911 of which this application is a division.

The heater comprises, in general terms, two groups of hollow or cored out cast metal sections 9, one atone side and the other at the other side of an intermediate fire box 10, the latter equipped with a fuel grate 11, arranged above an ash pit 12. Each of the cast metal sections of the heater is made hollow to provide therein a water space 13, and the water spaces of the several sections communicate with each other through connecting nipples 14, 15 respectively. Said sections are of such thickness at their lower and upper end parts and along their outer marginal parts as to fit closely together, while the central parts of the sections abreast the the box are made thinner so as to form between the thinner portions of said sections lateral fines or passages 17 for the heated gases to pass upwardly from the fire box; said fines or passages communicating through lines 18, 19 at the sides of the heater with a smoke box 20 at the rear of the furnace in the manner clearly described in aforesaid pending application.

Fuel is fed to'the fire box 10 from a mag-a zine 25, located at the top of the heat-er, between adjustably supported throat pieces 26 supported on the front and rear walls of the heater at the inner parts of the upper overhanging portions 27 of the heater sections; saidthroatpieces being designed to be adjusted toward and from each other to adapt the heater to different kinds of fuel, in the manner fully set forth in aforesaid pending application.

Referring now to the construction of the grate and associated mechanism which constitutes the present invention, and which is adapted to be applied to the general type of furnace set forth and to other types of furnaces, the same is made as follows: Said grate comprises two sets of rocking bars 30, 30, one at each side of the center of the furnace and arranged to incline downwardly and outwardly from a central tubular ridge bar 31-, that is supported at its ends in any suitable manner in the front and rear walls of the furnace. Said rocking grate bars are mounted at their lower ends to rock or rotate in sockets 32 formed in the inner sides of the, heater sections 9, and are mounted at their upper ends to rock or rotate in U- shaped sockets 33 atthe sides of the ridge bar. Said rocker bars carry grate fingers 35, of any usual or preferred construction, which constitute the support for the fuel bed. Said fingers are arranged to lap one over the other so as to be rocked past each other, when the bars are rocked on their axes, to clear the grate of clinkers. The said grate bars are adapted to be rocked in their bearings to agitate the fire bed and to clear the bars of clinkers by means of endwise recip rocable actuating bars 36, arranged one at each side of the furnace and having the form of elongated cast metal plates, as best shown in Fig. 2. Said actuating bars extend from front to rear of the furnace and are arranged above the outer or lower ends of the grate bars and, as herein shown, are disposed in planes at right angles to the planes of the adjacent grate bars. Said actuating bars 36 are made of such width as to constitute a substantial support for the fuel bed at the lower or outer sides thereof. They are connected to the rocking grate bars by means of upturned crank arms 38 on the grate bars which are provided at their upper ends with inturned ends 39 that engage with transverse recesses 1O formed in the outer or rear sides of said actuating bars, as clearly shown in Fig. 1. The arrangement is such that endwise reciprocation of the actuating bars 36 transmits, through the crank arms 38, a simultaneous rocking motion to all of the grate bars thus connected therewith.

The said grate actuating bars 36 are pro-. vided at the forward end of the furnace with extensions 12 which project through the front wall 43 of the furnace, and said extensions are pivotally connected at 4:4 to operating levers 45 which latter, are in turn, pivotally mounted on brackets or lugs i6 that are attached in any suitable manner to and project forwardly from the front wall of the furnace. When the levers 45 are swung throughout their full range and the grate actuating bars are fully reciprocated, the grate bars are rocked to agitate the fuel bed supported thereby and to clear the grate of clinkers which may adhere thereto, and also to dump the fire.

As a further improvement the said recesses 40 which receive the inturned ends of the crank arms 38 are made slightly wider than the diameter of said int-urned ends of the arms so as to thereby permit slight lost motion of said actuating bars relatively to said arms. By reason of the substantial support given to the fuel bed by the relatively wide or broad grate actuating bars 36, such slight movement of the actuating bars, relatively to the grate bars, serves to loosen up the fuel bed in the portions thereof supported by the actuating bars and without giving movement or actuation to the grate bars. The said actuating bars may be provided with openings 50 to permit air to pass therethrough to the fuel bed above to thereby furnish additional air to the fuel bed.

In order to increase the stirring action due to the reciprocal movement of the grate actuating bars 36, either when the bars are moved slightly without rocking the grate bars, or when they are given full movement to rock the grate bars, the inner faces of said actuating bars in contact with the fuel bed may be roughened, as by providing them with the transverse ribs 47, shown best in Fig. 2. Such roughened surfaces serve to increase the stirring or agitating action of the movable actuating bars against the fuel bed. This function of the actuating bars also serves to prevent the accumulation of ashes and clinkers at the lower ends of the grate bars and to facilitate the dis charge thereof through the grate to the ash pit below.

I claim as my invention 1. In a furnace, a fire box, a grate comprising rocking bars extending transversely of the fire box and arranged obliquely tothe horizontal, a reciprocable actuating bar arranged at the side of the fire box and extending from front to rear thereof above the lower ends of the grate bars and connected to the grate bars by means permitting lost motion between said parts, said actuating bar being made of substantial width to support the fuel at the lower ends of the grate bar and being roughened on its inner surface.

2. The combination with the rocking grate bars of a furnace, of an actuating member arranged above the rocking bars and having a substantially broad surface to support the fuel bed, with means for connecting the same to said grate bars the surface of the actuating bar in contact with the fuel bed being roughened, for the purpose set forth.

3. In a furnace, a gratecomprising two and endwise reciprocable actuating bars at the sides of the fire box arranged transversely over and above the outer lower ends of. the grate bars and having means for connecting them with the grate bars to rock the latter, said actuating bars being roughened on their inner sides toward the fuel bed.

4:. In a furnace, a grate comprising two sets of rocking grate bars extending obliquely downwardly from a central support in the furnace to the sides of the furnace and endwise reciprocable actuating bars at the sides of the fire box arranged transversely over and above the outer lower ends of the grate bars and having means for connecting th-e-m with the grate bars to rock the latter, said actuating bars being made of CHARLES F. NEWPORT.

Witnesses G. E. DOWLE, W. L. HALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

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