US601601A - Half to james b - Google Patents

Description

(No Model.) 1 2 Sheets-Sheet 2. J. THURELL. FURNACE GRATE Patented Mar. 29, 1898.

(5 19 1 7II ll z yr i UNITED STATES P TENT OFFlCE.

JOHN THURELL, OF NORTH ADAMS, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO JAMES B. KEANY, OF SAME PLACE.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 601,601, dated March 29, 1898.

I Application filed April 10, 1897- Serial No. 631,681. (No model.)

To all whom it may concern.-

Be it known that I, JOHN THURELL, a citizen of the United States, residing at North Adams, in the county of Berkshire and State of Massachusetts, have invented new and useful Improvements in Furnace-Grates, of which the following is a specification.

This invention has for its object to provide a furnace-grate comprising rocking or oscillating grate-bars wherein the lugs with which the shaking-rods connect can be conveniently and quickly adjusted before or after the grate-bars are mounted in their supportingframe for the purpose of enabling the grate to be set by an inexperienced person and to enable the central grate-bars, if they should burn where the fire is hottest, to be reversed or turned end for end and placed in correct operative connection with the shaking-rods.

To accomplish this object my invention consists in the features of construction and in the combination or arrangement of parts hereinafter described and claimed, reference being made to the accompanying drawings, in which Figure 1 is a plan view, on a reduced scale, of a furnace-grate embodying my invention. Fig. 2 is a detail vertical sectional view on a larger scale, taken on the line 2 2, Fig. 1, the grate-bars being in normal position. Fig. 3 is a similar view indicating by dotted lines the position of the parts when rocked in one direction. Fig. 42 is a similar view indicating the position of the parts when rocked in the opposite direction. Fig. 5 is a detail perspective view, on a small scale, of the rectangular or square frame by which the rocking or oscillating grate-bars are supported; and Fig. 6 is a detail perspective view of the gratebars.

In order to enable those skilled in the art to make and use my invention, Iwill now describe the same in detail, referring to the drawings, wherein the numerals 1, 2, 3, and 4 indicate the vertical walls of a rectangular or square metal frame designed to be set into a brickwork or other furnace structure for the purpose of supporting the rocking or oscillating grate-bars, hereinafter described in detail. The rectangular or square frame is an integral casting, having at each one of its four corners a laterally-projecting flange 5, each designed to fit into a recess in the furnace structure for the purpose of supporting the frame in proper position. The frame is also cast integral with a central longitudinal I division-plate 6.

,The rocking or oscillating grate-bars 7 are arranged in two sections at opposite sides of the division-plate 6, and each bar is provided at its ends with trunnions 8, those at the outer ends being seated in bearings in the side walls 2 and 4 of the rectangular or square frame and those at the inner ends being mountedin bearings provided in the top edge of the division-plate 6. The grate bars are also each cast integral at the front and rear with alternating long and short arms or fingers 9 and 10, the short arms or fingers 10 being about one-half the length of the long arms or fingers 9. The extremities of the long and short arms or fingers are formed, respectively, with arc-shaped or beveled edges 12 and 13 at their under sides, and the long and short arms or fingers of one grate-bar are in exact alinement with the long and short arms or fingers of' adjacent grate-bars, the construction and arrangement being such that the arc-shaped or beveled edges of the alternating arms or fingers of one bar-face oppose and move in close relation to the arc-shaped or beveled extremities of adjacent grate-bars, whereby the small spaces between the extremities of the arms or fingers of one bar and the arms or fingers on the adjacent bars remain invariable and effectually prevent coal or fuel dropping through to the ash-pit, particularly when the bars are rocked or cscillated. This resultis accomplished in a better manner by my construction and ar rangement of long and short arms or fingers than is possible with long and short arms or fingers not arranged in alinement in the manner described and shown by me. The areshaped or beveled extremities of the long and short arms or fingers may be made tomove very close together to greatly reduce the intervening spaces without any danger whatever of binding or clogging. The upper surface of each grate-bar is fiat, so that they present a substantially smooth fiat grate-bed which can be easily cleaned.

' in each grate-bar, as shown.

wherefore they may be interchanged as to position in the event of those bars which are arranged at the point of greatest heat becoming burned out.

The grate-bars of each grate-section are each provided with pendent lugs 15, adjustable laterally with relation to the furnace structure or longitudinally with relation to the grate-bars. justable along the grate -bars by means of bolts, which pass through elongated slots 15 The lugs 15 on the grate-bars of each grate-section are piv otally connected to a horizontal shaker-rod 16, pivoted at its .outer end to a lever 17,which is pivotally suspended by a pivotal pin 18 from a laterally-adjustable bracket or stud 19. The stud 19 has a part extending through a sl.ot.20 in the front wall 1 of the rectangular or square grate-supporting frame. The adjustability of the lugs 15'and pivotally-suspending levers 17 renders it possible for an inexperienced person to set the grate and ;toy subsequently adjust the lugs and levers as conditions may require. The adjustability' of the lugs and levers is also advantageous in that if the central grate-bars burn, where the fire is hottest, these grate-bars may be reversed or turnedend for end and placed in: operative connection with the shaker-rod 16 by simple adjustment of the lugs 15, or the? burned-out jgrate bar or bars may be interchanged with another grate bar or bars, as-

before stated.

The integral construction of the rectangu-' lar or square frame, comprising walls 1, 2, 3, and 4 with the lateral flanges '5, materially contributesto the convenient and quick set-i ting. of the grate by an inexperienced person.

These pendent lugs are ad-j My inventionprovides a novel and simple furnace-grate wherein rocking or oscillating grate-bars are each constructed at opposite edges with alternating long and short arms or fingers so constructed that when rocked or oscillated the alternating long and short arms or fingers will not bind or clog and the small spaces between the opposing extremities of the arms or fingers 011 one grate-bar and the arms or fingers on adjacent grate-bars remain invariable and effectually prevent coal or fuel unduly dropping through the grate to the ash-pit.

The invention also provides a novel, simple, efficient, and economical grate-supporting frame which greatly facilitates setting the grate and also enables the shaker mechanism to be conveniently and quickly ad usted according as circumstances require or conditions demand. v

Having thus described myinvention, what I claim' is 1. A furnace-grate comprising a plurality of interchangeable and reversible rocking grate-bars journ aled in aframe, lugs depend ing from and adjustable in said grate-bars, a shaker-rod pivotally connected with said :adjustable lugs, an adjustable bracket carried by the frame and an operating-lever piv- :oted .to said adjustable bracket and to the shaker-rod, substantially as described.

2. A furnace-grate comprising a plurality of interchangeable and reversible grate-bars provided with elongated slots, pendent lugs adjustable in said slots and correspondingly- :adjustable shaker mechanism, substantially as described. I

In testimony whereof I have hereunto set 1 'my hand in presence of two subscribing witnesses.v

. JOHN TI-IURELL. Witnesses:

ED. GUILBo, WM. H. BENNETT.

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