US1494685A - Furnace grate - Google Patents

Description

May 20 1924'.

J. A. HAFER FURNACE GRA'I'E Filed Jan. 16 1920 I cwywn fa 7723915 ,4 N 5 m. MU 3 Patented May 20, 1924.

warren srarss 1,494,625 PATENT OFFICE.

JAMES A. HAFER, OF GHAMBERSBURG, PENNSYLVANIA.

FURNACE GRATE.

Application filed January 16, 1920. Serial No. 351,939.

To all whom it may concern Be it known that I, James A. HAFER, a citizen of the United States, residing at Chambersburg, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Furnace Grates; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to furnace grates, and particularly to that type wherein the grate bars are mounted to rock upon the grate frame.

The object is to provide an improve means for anchoring the grate bars in the frame and for protecting the anchoring means against excessive heat of fuel burning on the grate bars; to provide an improved mounting for the legs which support the frame and which admit of removal of the legs and adjustment thereof for facilitating transportation of the grate and adjustment of the same in setting it up in a furnace;

and to provide an improved bracket and latch for supporting and locking the shaker lever to maintain the grate bars, in their normal position of rest. I

With these and further objects in view as will in part hereinafter become apparent and in part be stated, the invention comprises certain novel constructions, combinations and arrangements of parts as subsequently specified and claimed.

In the accompanying drawing,-

Figure 1 is a perspective view of a furnace grate constructed according to. the present invention, certain of the protective caps being removed to -expose the supporting bars.

Figure 2 is a fragmentary, enlarged section taken through a portion of the same showing the detachable leg mounting and the arrangement of the bridge iron for anchoring the grate bar to the frame.

Figure 3 is an enlarged, side elevation of a portion of the frame showing a grate bar mounted thereon according to this invention.

Figure 4 is a section taken through th same substantially on the line 44 of Figure 3.

Referring to the drawing by numerals, 10 designates the side of a grate frame upon which grate bars 11 are mounted, each of said bars comprising the supporting bar 12 and the grate sections 13, the latter being mounted upon the upper edge of the bar 12 and adapted to be fitted together for form ing a supporting surface for fuel to be burned. Theside'lO of the frame is provided with suitably spaced-apart bearings 14 which rise from the upper edge of the frame and which have verticalslotsor recesses 15' opening through the top of the bearings 14 and adapted to receive trunnions 16 formed on the ends of the supporting bars 12. The supporting bar 12 is provided with a detachable protective cap 17 which is preferably made of an integral casting of a width corresponding substantially to three grate sectionsand which is provided with spaced-apart pairs of depending legs 18 for positioning at the opposite sides of the upstanding bearing 14. Shoulders 19 and 20 are formed. on the bar 12 by the formation of the recess and trunnion 16. These shoulders 19 and 20 extend in the spaces between the pairs of legs 18 and, as particularly shown in Figure 4, are preferably grooved, as at 21, at opposite sides to receive correspondingly formed pro jections or ribs on the legs 18. The grooves 21 thus serve to hold the protective caps 17 from shifting laterally of the bearing 14. Adjacent the bearing 14 the side 10 of the frame is provided with webs 22 formed preferably integral therewith and bridging the spaces between adjacent upstanding bearings. A bridge iron 23 is bolted or otherwise detachably secured by fastening means 24 to the webs 22 against the outer faces of the same. The bridgeiron 23 extends across the outer side of'the bearing 14 and between the same and the outer shoulder 20. The bridge iron 23 extends across the top of the trunnion 16 and holds the same from rising in the bearing 14. The bridge iron is thus protected by the cap 17 and at the same time permits the free rocking of the grate bar and holds the same from lifting out of its bearing.

Any number of bridge irons 23 may be employed, but preferably one at each end only of the grate bar, as these retain the adjacent trunnions 16 from rising out of their bearings, and through the depending rocking arms 25 and the connecting bar 26 prevent the other trunnions 16 also from rising out of their bearings.

Each grate bar is provided with a depending rocking arm 25 andthe rocking arms 25 are pivoted to a connecting bar 26 which extends longitudinally of the frame and which has pivotal connection at its forward end by means of a bolt 27 to the lower end of a '7 shaking lever 28. The lever 26 is pivoted at adapted to receive the opposite ends of a pin projecting through and beyond the opposite sides of the shaking lever 28. Thus, the latch 33 holds the shaking lever in normal position and the lever, through the various connections, maintains the grate bars in proper position for supporting the fuel during consumption. The latch 33 may be quickly raised upon the ears 32 to release the lever 28 when it is desired to shake the V grate.

The frame is supported upon legs which comprise upper sections 36 and lower sections 37 detaohably'and adjustably connected together by bolts 38 whichpass through overlapping adjacent endsof the leg sections. The overlapping ends of the leg sections are provided with opposed serrated faces adapted to intermesh when the bolts 38 are tightened to hold the legs in adjusted position. The upper ends of the leg sections 36 are provided upon their inner sides with supporting shoulders 39 and upstanding reduced portions 40. The shoulders 39 engage beneath the edge of the side 10 of the grate frame while the portions 40 extend upa frame having a side bearing and webs adacent the bearing, a supporting bar having a trunnion seated in the bearing, a protective cap for the end of the bar straddling the bearing to protect the same, and a bridge iron secured at its oppositeends to said webs and extending across the top of said trunnion to maintain the same in the bearing.

2. In a furnace grate, the combination of a frame having an upwardly open-ing hearing and webs at opposite sides of the bearing, a supporting bar having a trunnion seated in the bearing and provided with upstandingshoulders at opposite sides of the bearing, a protective cap for the end of the supporting bar straddling the bearing to protect the samepand a bridge iron secured to said webs and projecting acrossthe trunnion beneath the cap to maintain the trunnion in the bearing.- o

In testimony whereofI affix my signature in presence of two witnesses.

7 JAMES A. HAFER. Witnesses H. B. MCNULTY, CHAS. A. DANFELT.

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