US1520239A - Shaking and dumping grate - Google Patents

Description

Dec. 9 4. 1,520,239

' A. D. HAMLIN SHAKING AND DUIIPING GH'ATE Original Filed Doc. 2 1905 2 Sheets-Sheet '1 Wa l wow:

A. D. HAMLIN SHAKING AND punt-rue GRATE 2 Sheets-Shedtz Original Filed Da c- 29. 1905 M Mae WM 12% i cgawuflww "M g a- Witmeoaw ymzfi/ My Patented Dec. 23, 1924..

UNITED STATES.

PATENT OFFICE.

ARTHUR D. HAMLIN, DECEASED, LA'IEOF DORTLAND, MAINE; BY MINNIE M. HAM- LIN, ADMINISTRATBIX, OF PORTLAND, MAINE.

SHAKING AND DUMPING GRATE,

Refiled for abandoned application Serial No. 293,806Qfi1ed December 29, 1905.

September 11, 1924. Serial No. 737,443.

To all whom it may concern:

Be it known that ARTHUR D. HAMLIN, late a citizen of the United States, deceased, residing at Portland, in the county of Cumberland and State of Maine, did invent new and useful Improvements in Shaking and Dumping Grates, of which the following is a specification.

This invention relates to an improve ment in shaking and dumping grates and more particularly to grates of this character employing rocking bars.

The object of this invention is the provision of a grate of this character in which the rocking bars are so formed and assembled that coals and clinkers will be prevented from accumulating between the ends thereof during the shaking movementthereof and thereby clogging the grate.

A further object of the invention is the provision in a grate of this character of means for maintaining the air space dur ing the shaking movement of the grate as when in its normal position.

A still further object of the invention is the provision of improved means for rocking the grate bars, whereby they may be rocked further on their axes than has heretofore been practical, to completely efiect the dun'iping of the fire.

Other objects of the invention will be apparent from the detailed description hereinafter, when readin connection with the accompanying drawings, wherein a preferable embodiment of my invention is shown and wherein like numerals of reference refer to similar parts in the several views.

In the drawings,

Figure 1 is a fragmentary perspective view of a furnace clip with my improved grate,

Fig. 2 is a transverse section through the grate frame.

Fig. 3 is a cross-section showing several of the grate bars in their shaking position,

Fig. 4 is a longitudinal section showing the grate bars in their normal position, and

Fig. 5 is a longitudinal section, with parts in elevation, showing the grates in their dumping position.

Referring now more particularly to the drawings, A designates the frame of my improved grate, which is preferably rec- This application filed tangular in form and comprises the end pieces B and the side pieces C, which are adapted to be supported-in any suitable manner within the furnace. Theend pieces B of the grate frame are provided with the inwardly extending spaced arms or teeth 6, for a purpose to be hereinafter set forth. The side pieces, C are provided with the inwardly extending lugs 0,'which have their upper surfaces curvedto formthe pivotal supports for the rocking barsD. The rocking bars D each. comprises. acentral por tion (5, in the ends of which are formed the I bar will extend into and substantially fill the space between two of the teeth of the next adjacent bar, the outer rows of teeth on the end grate bars extending into the spaces between the arms or teeth I) projecting from the end pieces B of the grate frame. lVhen the grate bars D are in their assembled position, the ends of the teeth 03, of each bar extend into proximity to the central portion at of the next adjacent bar. The ends of said teeth are curved substantially on the arc of a circle, the center of which is the pivotal point of the rocking bars, as at 03 so that they will maintain the same relative position with reference to said central portion cl during a portion of their rocking movement. In other words, the distance between the ends of the teeth (5 and the central portion d of the adj acent rocking bar will remain constant until the rocking bar is moved a suflicient amount to permit the ends of the teeth to completely clear said central portion. Each of the grate bars D has projecting downwardly from the central portion 01 thereof,

an arm (Z which is provided at its free end with a bifurcated portion d The arm 0Z of each grate bar is positioned directly in rear of one of the teeth cl thereof and is of such a thickness that when the grate bar is moved to its dumping position, the said arm may move up into the space formerly occupied by said tooth between two ofthe teeth of the next adjacent bar. E designates a rod which extends transversely of the grate bars D and is provided with a plurality of upwardly extending arms 6, which extend into the bifurcated portions d of the depending arms 01 of the grate bars and are pivotally secured therein in any suitable manner. The forward end of the rod E is pivotally connected by a link F, which projects through the front of the furnace, to the lower end of an actuating leverG which is pivotally secured to a bracket H attached to the front of the furnace.

The end pieces B of the grate frame and the central portion d ofthe rocking bars D are provided with air apertures extending therethrough.

Having described the construction'of my improved grate, I will now set forth the manner of using the same.

When it is desired to shake the fire, the operating lever G is moved to rock the grate bars D to a limited extent only, so that the ends of the teeth d thereof will not clear the central portion d of the next adjacent bar, and as the ends of said teeth are curved so that the same distance will always he maintained between the endsthereof and the central'portion (Z of thenex t bar, it will be seen that no clinkers can accumulate between the ends of the teeth and the central portions (l and thereby interfere with the rocking movement of the bars. Furthermore, as the ends of the teeth always remain the same distance from the central portion of the next adjacent bar during the shaking movement of the bars, it will be apparent that the same air space will be maintained during the shaking movement of the grate as when in its normal position. When it is desired to dump the fire, the actuating lever G is moved to cause the teeth of each grate'bar to clear the teeth of the next adjacent grate bar. Owing to the positioning of the depending arms d and the connection of the rod E therewith by means of upwardlyextending arms 6, it will be apparent that the grate bars can be turned to a position at substantially right angles to the grate frame to completely effeet the dumping of the fire.

I do not desire to limit myself to the precise form and construction shown in the drawings as it is obvious that many minor changes might be made thereto without departing from the spirit of the invention.

What I desire to secure by Letters Patent is A grate of the character described comprising a frame, a plurality of toothed grate bars journaled therein, the teeth of each of said bars being arranged to occupy the space between the teeth of the next adjacent bar an arm depending from the central portion of each of said rocking bars. said arm being positioned directly in rear of one of the teeth of said bar and of less width than the space between adjoining teeth on thenext adjacent bar and being of a length to permit its entrance into said space and to clearthe adjacent bar when the bars are rocked, a bar extending transversely of said grate bars and provided with a plurality of upwardly extending arms direct-1y underlying and pivotally connected to the free ends of the arms depending from said grate bars, and means for imparting a reciprocatory movement to said bars.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

MINNIE M. HAMLIN,

Admm. estate of fl'rthm" D. Hamlin, (Zeceased. Vitnesses MELVILLE H. MARsToN. HAROLD N. BURNHAM.

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