US1462393A - Furnace grate - Google Patents

Description

my 117, w23- 1462.393 R. E. STURMAN l 4FURNAC E GRATE Original Filed July 18 1917 Patented duly 17, 1923.

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ROBERT E. sTUnMiiN, or DELANO, MINNESOTA. y

FURNACE GRATE.

Original applica/tion led July 18, 1917, Serial No. 175,384. Divided and this application led January To a-ZZ whom t may concern.'

Be it known that Is ROBERT E. STURMAN, a citizen of the United States, residing at Delano, in the. county of Wright and State of Minnesota, have invented a new and useful Improvement in Furnace Grates, of whichthe following is a specification.

My invention relates to a furnace grate, .thepriinary object of which is to provide a grate that can be easily operated, being of simple construction and having a somewhat conical shape to distribute the fire or fuel in the furnace, or spread it out pyramidally in the furnace in which the grate is placed. This application is a division of my application filed June 18, 1917 bearing Serial No. 175,384. n

It is also an Object to provide a grate with a series of individual grate bars, which are pivoted at their ends, the inner ends of all of the `grate bars being provided with means which connects the segments with operating means so that all of the grate bars of the grate can be rocked simultaneously on their pivot points to shake the grate, or for dumping the same. The grate operating means is of such construction that it can be operated by a lever outside of the 'furnace in the ordinary manner. v

A further object of my invention is to provide `a grate which is so constructed that the grate bars canbe easily removed to be replaced when worn out or for repairs, and of a suitable shape to suit the occasion.

In the drawing forming part of the specication:

Figure 1 is a plan view of my grate.`

Figure 2 is a-section on the line 2--2 of Figure 1.

Figures 3 and 4 are detailed portions of the grate construction.

In the drawing A represents my furnace grate which is circular in shape, having1 a series of triangular shaped grate bars 1 which are formed with lugs 2 on their inner ends, and lugs 3 on their outer ends. The

rate bears 1 are pivotally held or supported y the lugs 2 and 3 on the grate supporting means, the lugs 2 engaging in the semi-circular recesses 4 of the spider 5, and the lugs 3 engaging in the semi-circular recesses 6 which are formed in the supporting ring 7. The supporting ring- 7 is held in the ordinary manner above the ash pit of the furnace and the supporting arms 8 of the spider 5 Serial No. 273,910.

are adapted to engage the ring 7 tolhold the spider 5 in place. The arms 8 project up-v wardly from their point of engagement with the ring 7 so as to elevate the central or body portion 9 of the spider above the supporting ring 7. The recesses 4 are formed in the body portion 9, so that when the grate bars 1 are in position with the lugs 2 engaging in the recesses 4, and the lugs 3 engaging in the recesses 6, the grate bars 1 will be held in a sloping position7 with their inner ends elevated above their Outer extremities, thusl giving a conical shape to the grate A.

The grate bars 1 are formed with suitable supporting fingers 10 which are spaced apart to give the desired draft openings to the grate A, the supporting fingers 10 decreasing in length from the outer to the inner ends of the grate bars, the fingers projecting from the body or longitudinally ex-y tending body portion 11 of the grate bars.

Each of the grate bars 1 has a gear tooth 12 formed with and projecting from the lug 2 which is adapted to engage or mesh with the teeth 13 of themushrooin gear 14, and a depending shaft 15 which is rigidly connected to the gear 14 extends through the axial opening 16 in the spider 5 and is rigidly connected on its lower end to the operating lever end of the lever 17 is pivotally connected to the operating or reach rod 18 at 19. Thel outer end 2O of the reach rod 18 is connected, in a suitable manner, to the shaker arm or lever which is positioned outside of the furnace, the shaker arm being of ordinary wellknown construction, and not being illus trated in the drawing.

In operation of the grate A, when the reach rod 18 is operated or reciprocated back and forth by the shaker arm, the gear 14 will be turned, thus causing the grate bars 1 to turn on their pivotal lugs 2 and 3 to oscil- 17. The n free late all of the grate bars simultaneously, or f to rotate them far enough to dump the ashes or fire from the grate when it is desired. In this manner the grate A is easily and effectively operated, and the conical or pyramidal shape of the grate causes the fire or fuel on the grate to assume the same shape, and thus has a tendency to evenly distribute the fuel or fire on the grate A tO give the best results.

The drawing illustrates the grate A of a circular shape, but it is obvious that other shapes and forms can be used without departing fromthespirit: of my invention, and

the seriesef` grate bars can bevaried in number and shape as may be desired. In the construction illustrated, the grate bars l can be easily removed andy nevv grate'bars inserted. The even operation or oscillatiouo all of the grate bars simultaneously 'is an i1n` port-ant,eature,..andallowsv the fire on the` grate A to be effectively yshaken in aivery` easy manner.

In? accordance .,With'thei patent statutes, :I have idesci'ibed/ the principles oiy toperation of my invention, together with the apparatus lwhich I inowconsider to `represent theibest- 'embodiment-thereof, butwI desire lto have :it

understood that theconstruction shown is only illustrative, and that 'the-invention can be carriedou-t by other means and applied to uses other-'than those above set forth 'Witlr in thef scope Aof theif'lfollowing claims.

l. -A` rocking bar grate comprisinga plurality of tapered grate bars provided attheir ends Withft runnions,-ixed means for sup-v portingV said grate lbars in radialf arrangement, upstanding lugs formed on the inner most trunnionsof said grate bars and an oscillatory head journalled insaid support-H ing `means having means adapted to eng-age said lupstanding lugs'to rock the grate bars. 2. Arocking grate comprising a fixed `annular support, a hub coaxiallyf: arranged relative thereto :and connected therewith, a pluralityl of'socketsformed in said annular support, corresponding sockets formed in -said^hub,`l a `plurality 'of grate #bars having trunnions journalle'd `.in said sockets, protru sions formed' on said hub-trunnions, an oscil' `latory head mounted in said hub, means formed on said head simultaneously coacting *with 4'saidf protrusions for y'simultaneously rocking said grate barsand means or `oscil latin@ said head."A 3.' nI-a device pointsie fof thef class described, ar series of triangularly shaped grate bars, ar-

rangedin radial relatiomime-ans forpivot 45 illyi holding said grate bars on theirinner and outer ends for oscillation about their longitudinal vaxes,atoo.th formed on the inner end of each of said grate bars, a gear positionedabove said grate bar teeth, adapted to engage said teeth and means for operatingk said gear to oscillate said .gr ate;bar s-. on theiripivot points.

4. In a furnace grate comprising a series `oi radially arranged.-grate-bars,m-eans for\55 holding said grate rbars .pivoted `ateach enel,Y an upwardly iextending gear tooth, .formedy grate bars, a mushroom gearffon/engaging v said i gear. teeth, an :operatingdever connecw $.60

ed to said mushroom'.gearhiandmeans!consu. neet-ed lto said operating.. lever which, when reciprocatedbaok `and orthis adapted; tom` move saidfniushroom gearto.simultan'eouslyg;I j y ing in i length from ther outer endsi of f said grate bars toward. the innerends` thereof, Y- gear teeth `formed. on said segmentsfat theiry A'80 inner ends, a i gear ,axial-lyheld in said-spider; .i or engaging. ysaid teeth and; means fonoper-x :I ating said gear to oscillate saidgrate'bars= on their pivot pointsito shakesaid gratebarsr or to'idump .ther same: substantially ,gasi y're-.3,85 quired, z

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