US1209321A - Furnace. - Google Patents

Description

A. W. MOYER.

FURNACE. n APPLICATION FILED SEPT- 25 1915.

4 SHEETS-SHEET I- l I/ 7l Patente@ lie. 19,1916. r

A. W. MOYER.

FUHNACE.

APPLICATION FILED SEPT. 25. |915.

3,209,321. rammed Deo. 19,1916.

4 SHEETS-SHEET 2,

A. W. MOYER.

FURNA'CE.

APPLICATION FILED SEPT. 25. |915.

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I *Wyk Patellted Dec. 19, 1916.

.A 4 sHEE/Ts-sHEzT' 3.

A. W. MOYER.

FURNACE.

Amlcmon mw un. 2a. ma.

1,209,321. Patented Dec. 19,1916.

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ATT Y ALBERT W. Mommer- NEW-Yona, N.

, FURNACE.

' specification ormeue'rsratena Patented Dec. 19,l

Appuoaaon'aia s'eptomberas, 1915. seria1No.`5'2,572.

To all whom .it may conce-rn:

Ben known am .1, Amaai W. Mom-,

va citizen of. the United States 'of'AII1 c\ri1ca,I residi'n at New York, county and- State' of' New Drk, have invented a new and useful Furnace, of which the following is aspecify sectional vieiv taken at the entrance end ofieation. i

My invention relates particularly to what fare known as heat treating furnaces.

'tively :cont-rol and retain the heat and'furtli'erto prevent waste andloss ofheat by A special object is the provision of simple' and effective means for the heat treat- 'ment of shra'pnel and yarticles'.of similar character.. l .K l In the attainment of these objects I have 'v i constructed a furnace having auupper combeprovided ivithalayerof suitable heat inbustion chamber and a lower heating chamber, 4said chambers being separated by a perforated arch and the discharge from the heating chamber taking place through outlets-1leading from the bottom.of said cham-v ber.' These'outlets lead off from the heating chamberifnsuch a Way as to leave the side:

A' walls oi' 'said heating chamber solid and qimpelrforat'e vviieil'eby the better to retain the heat' within the'iheating chamber. These imperfora'te sidewalls. will preferably also sulati'ng, material,

f Another feature of.v the' ,invention is a hearth of improved construction made up of closely lai-d 4blocks havingtrtheir"A upper sur.

faces shaped to providefchannel'stor-guiding the articlcsthroligh' theiheatn'g chamber.

that changes and modifications may be made without departing from the true scopel and spirit ofthe invention. I

. Figure 1 is :in ond view of a furnace installation embodying the invention and com- 'prisingr` a so-oalled heat treating`funacc u'nit'and a, reheating furnace unit, the

`2 is a horizontalsectonal vievvtaken ysub-- stantiallyon the plane oftholinc 2;-2 of .Il *ifa 1.. Fig. s is a long gitudinal constan-'- tialy centralsectional lView of the heat" v tieating furnaceunit.y F igis a broken the relieatingr furnace unit. Fig. 5 `a deiA tal-lperspectiveii-'view of the withdrawing In r11-@installation Shown; ieri@ tile 'hat yheating furnace unit, andll is thexreheatf ing furnace unit. These two umts, except for details which will later be referred to,

are substantially the same in construction so vthat; the general description of one will su# ce for both. Y

reheating unitboing siren/'I1in"secti'oln Fig;

The interior of the furnace body is divided by an arch wall 12 into an upper .c'zoni-y bastion chamber 13 and a' lower heating chamber 14, said -arch Wall having suitable openings orperfo'rations 15 therein permitting' heat products to pass freely from the combustion chamber down into the heating chamber. AA burner 16 (or serieso'l burners `usually) discharges vinto the Y combustion chamber through aburner .opening 17 (or openings) in the side of said chamber;

The waste products discharge from the `heating chamber through outlet liuesQOlo'- cated at the bottom portionI of the chamber and extending in the presentinstance dovvn- Wardly and inwardly fromthe opposite sides 'of the furnace into a common exit flue 21V extending longitudinally beneath the hearth of the furnace-- This arrangement of the outlet luesleaves the side walls 22 conlstituting the sides to the heating `chamber Solid except for the fines 2O and .therefore `folpractical purposes substantially imperforate, and, therefore, better capable-of re-` tainnglthe heat within the heating; chamber. ulie retention of heat Within the heating chaijnberisfurther accomplished by a layerof'rhat .insulating material such as indicated at' 23,. Inthe presentfdisclosure the .Waste gases aie .carried from both furnaces throughlbrjanch. filles-24 toa common outlet -staclf.25.. 4 Valves 2G' may be provided `to regulate/the flotvlt'hrough' theoutlet tlues for controllingthe'heat ili'th'e heating. chamber.

The installation illustrated isA designed primaribT fo'r the treatment 0f 'Sbrapnel, 'the shrapnel being fed ,through the furnace iin tive parallel rows substantially.' as indicated at 30 in Fig. l. The shrapnelare guided-in grooves formed' in the hearth of the heating chamber, these grooves being provided in the present instance by means of closely laid hearth blocks 31 having the vrounded upper surfaces as indicated inFigs. 1 and 3 which cooperate when the blocks are 'laid to'form longitudinal guiding grooves or channel-s 82. f

The shrapnel are fed through the heating chamber in the present instance bya Vpusher comprislng ak hydraulic or pneumatic cyl1n der -35 having a piston4 whichoperates apusherhead 36v To guide and position the shrapnel for `charging into the furnace, a charging car 37 is here provided traveling on tracks 38 adjantthe entrance 39 to the heating chamber of the' heat treating uni-t.l This charging car is provided with a series of pockets or recesses .40 therein registering With the guide channels in the hearth. In operation, a charge of shrapnel is placed on the'carg'the door' 4 1 normally closing the entrance to the heatingv chamber is opened and the'` pusher is operated to thrust the charge into the furnace. The Weight of the shrapnel and the frictional engagement in the guide pockets 40 is ordinarlly sufficient to causer-the. pusher-.head as it engages the shrapnel to carry along also the car thereby causing the car to bridge the space left by the door, and to bring up against the outer.- inost hearth blocks. After the car engagesV with the hearth, in .this way, the further stroke ofthe pusher projects .the shrapnel outfof the pockets on'the car into the guide channels on the hearth. The shrapnel` are n thus advanced one row atA a time until the furnace is fully. charged. After charging, ythe furnace is closed until the row of shrapnel first `inserted have received the treatnient predetermined upon'. A fresh row of shrapnel is then charged into the furnace, this having the effect of forcing out the first Vrow of shrapnel at the discharge end of the furnace. v In addition to its function of charging the shrapnel into the furnace, the pusher is constructed and arranged to withdraw the charging car out of the way of the de- 50 ing or u'fithdrawing the treated obj ccts from4 the heat treating furnace, and transferring them to the reheating. furnace. Such means here takes the form of withdrawing tongs 50, supported at the discharge end of the heat treatingvunit and arranged to carry said objects from this first. furnace to the second or reheating furnace. tration the furnaces aredisposed side by side withthe exit end 51 of the first furnace adjoining the entrance end 52 0f the other furnace, and a quenching tank 53 extends across these faces' ofthe` furnaces, in which the objects vare cooled while being transferred from one furnace to-th'eother.

The withdrawing device here disclosed'is made up of a body 55 ada ted to be rested upon a shelf 56 at the disc arge end of the lheat treating furnace, and provided with In the `illusv vpockets 57 therein registerin with the guide channels of the hearth. hen .the withdrawing device is thus supported at the dis i char e end of the h'eating chamber as cate in Fig. 3, andthe charging.pusher'1s operated, the foremost row of shrapnel will' be'forced off into the pockets 57 in the withdrawin device.'

The s lrapnel or other objects maybe held in the withdrawing device by .means of a objects and gripping fingers 59 adapted t0 engage the opposite ends of the objects. In

flange 58 adapted `to overlie the ends of the The withdrawing'device is shown movl ably supported by a hydraulic or like hoist arranged toftravel on a track 71 extending above the quenching tank and across the adjoining ends of the 'two furnaces. The hoist is provided with a hook 72 engaging with an eye 73 on the tongs.

`After the tongs have received a. load of shrapnel or. other objects as indicated in Fig. 3, the tongs are withdrawn clear of the supportingshelf 56 by means of the handles 62l and are allowed to' swing down into an upright (position. The/hoist is then operated to ip the tgngs car ,ing the objects down into the tank. In lt'liis way the objects can be plunged straight down into the tank so as to temper them evenly all around. The hoist can then, without'lifting the ton be traveled along its track to a point d van l front of the reheating furnace. This passage through the tank properly cools the vobjects and also circulates the cooling fluid s0 as to keepit at an approximately uniform temperature. Before inserting the objects in the reheating furnace the tongs are' rotated half way around, from the dotted line position in Fig. 3 into the position indicated in dotted lines in Fig. 4. This is usually done before lifting the tongs from the tank. After ist ine

ill

of the furnace so las to cause the objects to drain any liquid they may contain backinto 4the tank. l.

Suitable means are provided for charging and feeding the objects through the reheat ing furnace. The means here disclosed fory this purpose is a pusher made up of twol1 cylinders 80 located at opposite sides of the furnace and having their piston rods 8l connected by a bar 82 vforming a pusher head for engaging the objects rested on the charging shelf 75. `W hen the objects have been placed by the tongs on said charging shelf,-

.as shown in Fig. 1i, with the` pusher head 82 engaging in rear of .the objects, the tongs 1smanipulated to release Vit and remove it from the 'objects and the pusher is operated to charge the objects into the furnace. After thus discharging its load, the .tongs may be carried back to a position in front .of the iirst furnace. In the illustration, Fig, till@ track 71 is shown made in the form' of .u loop, This permits the use of several hoists and facilitates the return of the hoists and tongs back to the rst position.

The chargingvpusher for the reheatingI furnace serves to` feed the objects through this furnace in the same Way as was described in connect-ion with theipusher of the first furnace. In this reheatinij furnace the temper is drawn and vtheslirapnel or other objects are annealed to theextent determined upon. The treated `objects may be discharged from the ,discharge end 85 of the annealing furnace onto acar or suitable conveyance, if so desired. -1

From the foregoing it will be apparent that with my invention shrapnel or objects of the like character can be readily and effectively treated Without any loss of time in handling and at a considerable saving of time over present methods of treating each shrapnel separately. Furthermore, the furnace constjriu-ted according to vmy invention, by reason of the conservation and utilization of all the heat is economical in operation and can be so controlled as to secure the most effective results. The hearth blocks are preferably made of iron or other heat retaining material, and so serye'in addition lo `duiding` the objects through the chamber, to retainv the heat'and keep the working chamber at a practically uniform tempera? turc. The hard rounded surfaces of these blocks 'providil eilicient guiding channels in which there is no danger of the objects becoming caught or clogged and',y the blocks lthough very durable andflasting may, if

they should wear out, be very readilyre.- placed.

The location of the exit' iues in both side walls of ythe furnace body and near the bottom portion of the heating'chamber causes the heated gases to pass evenlyA vdown through the heating vchamber and this .construction, whereinthe side Walls ofthe furnace body which form the sides ofthe heat# ing chamber 'are 'rezxof perforations above the exit nues, eliminates the Striped efect present in prior `furnaces wherein the side walls of the heating chamber are perforated by lues andfhence a're incapable of retain` so ing the temperature uniformly. Thesesolid `side walls retain the heat to a uniform extentthroughout and so radiate heat into th'- heating chamber Y uniformly throughout their extent; f

' Another important feature of the structure illustrated is' that the flow vof hot. gases through the furnace is accomplished through thev action of burners, said burners forcing the gases downward through the 9o perforated arch, through the heating chamber and "out the downwardly and laterally extending portions of the exit flues to the upright stack 25' which is jsimply a vent located at a convenient point for conduct- 9'5 o# the waste gases.

It will be understood that the terms em ployed in disclosing and claiming this invention 'are used in a descriptive` rather than in a limiting sense, except in so as far as may be required by the prior art.

What I claim is: y 1. A gas or oil `fired furnace comprisingl a ,furnace body having' side walls and a perforated arch -extending across between said side walls of the furnance body and dividing the interior of the same into a lower heating' chamber and an upper combustion chamber disposed directly and ,wholly above the heating chamber, the com- 11o bustion chamber thus vprovided having burner openings therein and the heating chamber havinge exit fluesin both side walls thereof leading from the bottom portion of the chamber, the side walls-of the furnace vbody forminpr the sides of the heating ,chamber being otherwisev free ofAperforations thei'einwhereby to retain `the temperature uniformly throughout said side walls and w thereby radiate heat uniformly from said l walls into the heating chambeiand burners dischargingVV through the burner` openings into the combustion-chamber.

2. A gas or oil tired furnace comprising a furnace body having side walls and a per-13125 forated arch extending across between the sidewalls of the furnace'body and dividing the interior of the same into a lower heating chamber and anupper combustion chamber disposed directly and wholly above the heating chamber, the combustion chamber thus provided having burner openings therein andthe heating chamber having exit iues in both side walls thereof leading .from the bottom portion ofthe chamber, the side walls of the furnace bodyforniing the sides -of the heating chamber being otherwise free to retain of perforations therein whereb the. temperature uniformly within the heating chamber, a layer of heat linsulating material on the furnace body and burners dischargin through the burnerv openings into the com ustioii chamber. j

3i A gasfor. furnace comprising afurnaoebodyfhaving *side wallsand a pery:foratedarch ex'tpndingacross between the `'iside walls of the 'furnace body and dividingy the interiorfof thesame into a lower. heating chamber'and an `upper combustion ch ber disposed directly and whollyv above the hiaating chamber, the combustion chamberfthus v"provided .having. burner openings therein j and the-heating chamber having exit iiues in both side wallsthereof leading from the bottom portion. ofthe lchamber, the side Walls of the furnace-body forming the sides.

ofthe heating chamber being otherwise. free of perforations therein whereby to retain the temperature uniformly within the hea-tA ing chainberrdampers controlling the flow. 'through the exit *fines and'disposed adjacent' the junctions. oflsaid'iiue'sI with'the-heating v chamber .to thercbycontrol 'theflow As'ubstantially at the source and burners'dis-- vdown and out .ing chamber, nthe combustion' chamber thus :provided having burner. openings .therein and the heating chamber havin exit iiues 1 locatedin' the side walls substantially at the bottom'of the heating chamber and said side walls whichform the sides of the heating chamber being free of perforations above exhaust vent 4separated .from the furnace vbody andv in vcommunication with the laterally .extending portiono'f thevexit ues and pressure burnersdischarging iii through the vent.

'said exit lues. therein' to thereby retain heat uniformi .throughout the extent" of the side Walls an ."to radiate heat uniformly into the v heatin chamber, ,the e'xit flues aforesaid extending downwardly and thenceV laterally '.fro'm beneath V'the fu'rnacebody,V an Iupright y burner openings into thec'ombus'tion cham fberand forcing' gases tif-'combustion vdown .through the. perforatedy arch-into the heatf' fing' chamber and from said heating chamber the exit ues up the upright

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