US1292923A

US1292923A - Furnace-grate.

Info

Publication number: US1292923A
Application number: US11230416A
Authority: US
Inventors: Soren Thurstensen
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-31
Filing date: 1916-07-31
Publication date: 1919-01-28
Anticipated expiration: 1936-01-28

Description

S. THURSTENSEN.

FURNACE GRATE.

APPLICATION man JULY 31.1916` Patented Jan. 28,1919.

3 SHEETS-SHEET l.

@www .l H-H-H-H N S. THURSTENSEN.

FURNACE GRATE.

APPLICATION FILED JULY 31,1916. 1,292,923, Patented Jan. 28,1919.

n 3 SHEETS-SHEET 2- s; THURSTENSEN.

FURNACE GRATE. APPLICATION FILED JuLY 31.1916'.

Patented J an. 28, 1919.

3 SHEETS-SHEET 3- sections which are oscillata STATES PATENT OFFICE.

SOEEN THUBSTENSEN, OF LOUISVILLE, KENTUCKY, ASSIGNOB TO HENRY VOGT MACHINE COMPANY. OF LOUISVILLE, KENTUCKY, A CORPORATION OF KENTUCKY.

FURNACE-GBATE.

'Specification of Letters Patent.

Patented Jan. 28, 1919.

Application illed July 31, 1916. Serial No. 112,304.

Be it known that'I, SoREN .lHUms'rnNSEN,

a citizen of the United States residing at Louisville in the county of Jzelerson and State of kentucky, have invented certain new and useful Improvements in Furnace- Crates, of which the following is a specicat1on.

In the construction of familiar types of furnace gratos, there are provided grate ly mounted in suitable bearings, so that they can be rocked about horizontal axes. In the ordinary operation of shaking down the grate, lthese sections are oscillated back and forth substantially equal amounts on both sides of the central or normal position. When it is desired to dump the grate, the grate sections are rocked an additional amount in the dumping direction, so that their upper or rate surfaces are thrown into substantial y vertical positions. The various grate sections are mountedlin suitable bearings, which bearings in turn are formed in horizontal bars lymg at right angles to the direction of the grate bar sections. Ordinarily the grate bar sections extend across the furnace and the bearing bars extend from front to rear. It is customary to provide one of these bearing bars at each side of the fur nace. When the furnace is so -wide as to make it undesirable to use grateV bars of full width, the furnace is divided up into two or more sections. Each of these sections is of less width than the width of the fur' nace, and su porting barsare mounted between the adjacent edges of consecutive sections. These supporting bars provide bear- 1iDngs for the inner ends of the adjacent grate ars. v

n In all previous constructions of grate with which I am familiar no attempt has been made to carry the ate bars over the bearings ofthe supportmg bars, so that the said bearings have been exposed to the intense heat of the fuel bed. Furthermore this omission in previous forms of construction has resulted in the provision of an uneven grate surface, there being depressions or openings in the surface of the grate at the points where the bearings are located. Coal and ashes necessarily accumulate in these openings, and this Vtends to jam the bars so that they cannot be readily rocked.

One of the objects of the present invention is to provide a construction of grate in which the said bearings will at all times bte covered over and protected by grate sectlons, so that when the grate bars are standing in their central or normal osition there w1ll be presented a practical y continuous rate surface throughout the entire area of t e furnace. This will prevent the coal and ashes from having Vdirect communication with the bearings, and at the same time will largely overcome the aforementioned dif# ficulty and objection, due to the jamming of the grate bars when they are being oscillated.

Another feature of the invention has to do with the manner in which the grate bars are built up. In this connection one object is to provide a sectional grate bar which can be built up from a minimum number of parts to the desired size, all of the parts being of standard form and construction.

Other objects and uses of the invention will appear from a detailed description of the same which consists vin the features of construction and combinations of parts hereinafter described and' claimed.

Referring .to the drawings:

vFigure 1 shows a plan view of a grate embodying the features of thepresent invention, said ate comprising two sections lying side by slde with an intermediate bearing bar, the central portion of one of the sections being broken awa for the purpose of reducing the width of t e figure;

Fig.y 2 shows a longitudinal section taken on the lineA2-2 of Fig. 1, looking in the direction of the arrows;

Fig. 3 shows a side elevation of one of the rocking bars with the grate sections in place, the upper portions of the grate sections bein broken away for the purposes of convenience and illustration; Fi 4 shows a plan view corresponding to Flg. 3, with the exception that the grate sections have been removed in their entiret Fig. 5 shows a cross section taken on t e line 5-5 of Fig. 1, Looking in the direction of the arrows, Fig. 5 bemg on a smaller scale than Fig. 1;

Fig. 6 Ishows a cross section taken on the line 6-6 of Fig. 3, Iookingin the direction of the arrows;

Fig. 7 shows a horizontal lsection taken on the line 7 7 of Fig. 6, looking in the the numeral 12 and the bridge wall by the numeral 13. In the construction illustrated the furnace is of such width that two grate sections are used, the same being mounted side by side and being designated by the numerals 14 and 15. Each of these sections runs the full depth of the furnace, although manifestly, if desired, each grate section might be constructed to occupy only a portion of the depth of the furnace, the number of sections being multiplied accordingly.

In like 'manner a greater or lesser number of sections may be used across the width of the-furnace according to the requirements of the particular construction in hand.

Each grate section is built up from one or more bars 16 on which are mounted the leaves 17. The end portions of each bar 16 are suitably journaled. In the construction illustrated, this journal is eil'ected by means of the side bars 18 and 19, and the center bar 20, the center bar serving to support the inner ends ofall of the grate bars. l"Each grate bar is provided with a downwardly depending lug 21, and all of the grate bars of each sectlon are joined together by a rocking bar 22 which can be swung back and forth by means of a handle 23 in the usual manner. l

Each grate bar 16 is preferably formed of greater depth than its width, and its central portion may be cut away to provide -an elongated slot or opening 23a. This will lighten the bar without materially detracting from its mechanical strength. The side portions of each grate bar are provided with the vertical slots or grooves 24 formed in pairs on opposite sides of the bar. These pairs of slots or grooves accommodate the

arms

25 and 26 of the leaves in the manner indicated in Figs. 3, 4, 6 and 7. When all of the leaves have been set in position on a grate bar, they may be locked in such position by means of a rod 27. This rod extends between grooves 28 formed in the leaves, and grooves 29 formed in the side portion to remove any leaf without first withdrawi ing the rod 27.

The upper portions 'of the leaves are of l greater width than their depending

lug portions

25 and 26, and said upper portions are serrated as particularly shown in Fig. 1.

Upon osclllating any given grate bar, all

of itsleaves will'bel swung back and forth,

while the end portions of the grate bar oscillate within the bearings of the center and side bars.

An examination of. Fig. 1 in particular shows that the space occupied by the center v bar 20 is substantially equal to that occu. pied by a row of leaves extending from front to rear of the furnace, and such examination will also show that the furnace width occupied by each of the side bars 18 and 19 is substantially eoual to one-half the width of va row of`leaves. Consequentlyl unless some means is provided for protecting the center and, side bearing bars, a very considerable portion of the furnace area will be left unoccupied by any of the grate leaves. In order to remedy this deficiency, I have provided 'the constructions which I will now describe.

Reference particularly to Figs. 2, 5, and 8 will disclose the fact thatv the bearings are i portions '32 and 33 of the grate bars arel rounded and rest within the U-shaped bearings thus provided. A stationary cap section 34 is seated over each -of the bearings and serves not only to cover over and close the same, but also servesl to restore the .con-A tinuity of the upper surface of the grate when all the bars stand in their central positions. Each of the stationary leaves is provided with downwardly depending side lugs 35 and 36 which embrace between them 'the

upstanding lugs

30 and 31 of the bearing bar. It will be observed particularly from an examination of Fig. 8 that the side faces of the

lugs

30 and 31. both slant in one direction, the lugs 35 and 36 being similarly formed. A key 37 may be driven home between a keyway 38 formed in the lug 31 and a notch 39 formed in the lug 36. When the sald key is driven home, it will be impossible for the lug 36 to rise along the lug 31, and by reason of the outward pitch of the lug 30 1t will be impossible for the lug 35 to rise across the face of the lug 30 until the key -37 has been withdrawn'.

Those stationary leaves which are mounted on the center bearing bar are of a contour s1m1lar to the contours of the leaves mounted on the-grate bars-that is, they are serrated lwalls of the furnace.

l/Vhile I have herein shown and described -only a single construction of furnace grate embodying the features of my invention, still it will be understood that I do not limit myself to the said construction except as I may do soin the claims.

1. In a furnace, the combination of s aced bearing bars arranged in parallel re ation and having on their upper portions upwardly extending pairs of spaced lugs affording journal bearings, rocking rate bars having end journals resting in sait? bearings and having rate surfaces on their upper portions, `an cap sections on` the journal bearings inclosing their upper portions, each cap section having a pair of depending side lugs Iadapted to embrace the side lugs of the corresponding journal bearing, the coactin -faces of each Iset of engaging lugs on bot sides of the bearing being all pitched in substantially the same oblique ldirection, whereby the backward itch of the' lug on one side of the journal caring will interlock with the coacting lug of the corresponding cap section, and a key interengaging the opposite pair of lugs for maintaining the interlock, substantially as described.

2. In a furnace, the combination of s aced bearing bars arranged in parallel re ation and having on their upper portions upwardly extending pairs of spaced lugs affording journal bearings, rocking grate bars having end journals resting in sal bearings and having rate surfaces on their upper portions, am? cap sections on the journal bearings inclosing their upper portions, each cap section having a pair of depending side lugs adapted to embrace the side lugs of the corresponding journal bearing, the coacting faces of each set of engaging lugs on both sides of the bearing bein all pitched in substantially the same olique direction, whereby the backward pitch of the lug on one side of the journal bearin will interlock with the coacting lug o the corresponding cap section, and a key interengaging the opposite pair of lugs for maintaining the interlock, each cap section having its upper surface of contour similar to the contour of the grate surfaces of the adjacent rocking sections` and continuous therewith when the rocking sections stand in their normal position, substantially as described.

3. In a furnace, the combination of spaced bearing bars arranged in parallel relation and having on theirA upper portions upwardly extending pairs of spaced lugs affording journal bearings, rocking grate bars having end journals resting in said bearings, a series of grate leaves for eachv grate bar, having grate surfaces on their upper faces and havin arms embracing the sides of the bar, a loc ing rod for each grate bar jointly engaging portions of the arms and the portions of the grate bar for locking the leaves to the grate bars, and cap sections on the journal bearings inclosing their upper portions, each cap section having a pair of depending side lugs adapted to embrace the side lugs of the corresponding journal bearing, the coacting faces of each setof engagin lugs on both sides of-'the bearing being all pitched in substantially the same oblique direction, whereby the backward pitch of the lug on one side of the journal bearing will interlock with the coacting lug of the corresponding cap section, and a key interengaging the opposite pair of lugs for.

maintaining the interlock, substantially as described.

4. In a furnace, the combination of spaced bearing bars arranged in parallel relation and having on their upper portions upwardly extending pairs of spaced lugs affording journal bearings, rocking grate bars` having end journals resting in said bearings, a series'of grate leaves for each grate bar, having grate surfaces on their upper faces and havin arms embracing the sides of the bar, a locking rodl for each grate bar jointly engaging portions of the arms and portions of the grate bar for locking the leaves to the grate bars, and cap sections'on the journal bearings inclosing their upper portions, each cap section having a pair of depending side lugs adapted to embrace the side lugs of the corresponding journal bearings, the coacting faces of each set of engaging lugs on both sides of the bearings being all pitched in substantially' the same oblique direction, whereby the backward pitch of the lug on one side of the journal bearing will interlock with the coacting lu of the corresponding cap section, and aey inter-engaging the opposite pair of lugs for maintaining the interlock, each cap section having its upper surface of contour similar to the contour of the grate surfaces of 'the adjacent locking sections and continuous therewith when the locking sections stand in their normal position, substantially as described.

lSOR-EN THURSTENSEN.

Witnesses:

B. F. KUBAUGH, S. MULTHALL.