US1764647A - Heat-treating apparatus - Google Patents

Description

1930, Q R; ROSYCOEI- Q 3 1 HEAT TREATING APPARATUS Filed Sept. 30. 1925 5 Sheet-s-Sheg't l I E Ill l-lllli7,

" venfo/ gak/f/faswe June 17, 1930. R. ROSCOE HEAT TREATING APPARATUS 5 Sheets-Sheet 2 Filed Sept. 30, 1925 //7 venfar Robe f ffoscae June 17, 1930. R. RoscoE HEAT TREATING APPARATUS Y Filed se ia. so, 1925' 5 Sheets-Sheet; 3

f //7 venfon Rake/f fiascae A/T'y June 17, 1930. R. Roscoe I HEAT TREATING APPARATUS 5 sheets-sheet 4 /n. R0 eff Rascoe by A June 17, 1930. R. ROSCOE HEAT TREATING APPARATUS Fil'ed Sept. 50, 19 5- 5 sheets-sheet 5 Aiy ' Haber/#0156129 Patented June 17, 1930 3 m nosooE, or onAnnnnon -mnns; mmoi v gsmqa -'.i :o' WnsrERn nnne'rnro COMPANY, INCORPORATEQIQF nnw'vonn; nix; eyqonroraerlonorvnnwz 2on1:

lnnnn-mnnerrnegerrnlmrus fgAiiplication filed. September 30, 13, 25. lscer iino. 59, 77;

"Q This invention relates toheat treating paratus: and more particularly to apparatus for inserting and W itl -lolravv ing materials to beg-heat treated, I I i I 5 The object .of the. invention is -toprovide I simplifieidiand improved apparatusfor heat treating,material wherehy ithematerial may be; conveniently i and expeditiously handled with a mini um of-manual labor prior-to, dnrjing ia-nd t subseqiient to the treatment thereon j I The invention i is; -ireoted principally to I improvements in apparatus for treating ferrous articles bye process described in the moo-pending a'p'pli'cation of F'. -B. z'Rinck,

Serial-No. 7&4,291, -filed October 17 1924,}j

J In 'flCCOIdEtIlCG with the 'main features of'the invention in one; embodiment thereof the ,s apparatus' comprises an improved fur- 1-20 nace-,a charger thereforand means for supporting the materialt beingtreated. 'The fnr IIEt CQClSPIOVIdQd Wliill an air tight cyllndr oa'l V niufllehavlng-a cradle for recelvlng a frame containing the material and supporting it su'erheateri c0111 risin la luralit of inter I I I P p h p y li e-soar I connected lengths of pipe, the length} farthest 1 awny; from: the point of intake ofi the steambeing provided} With; steam discharge 30 ports, preferablynickel-copper alloy, is p0si charger includes a transversely moving {car and ohargingqarm or boom ed aptedi -to be moved longitudinally thereof, The I charging arm isrinounteld upon a plurality OfsITOllingirollerw gy I I 3 "Other 0lo'ject's} and '(fee re of: the inventi-on will be fh'olre zreadily lundersthod1 fro-Ilia consideration of. the? following description taken with ithea aiceoinpanying dra wings', in

' p e en iii v efiqeagthe rm;

' "Fig; :1 isa viewin perspective douhle I furnace and; assoei-tted charging and f storage apparatus embodying thelvt'eatiires of the supporting. devic para llelffloor rails 13 for {the purp'o's numeral v14 fforholding.materiaLto be treate'd charger 1 heingshovvn-in. ianlsintermediate position'y- I I v a I cFign 2 is; ar perspective view .of ,the. mnfile portion of the furnace illustratingieatures thereof including "ajsteam superheater sa nld;

the Cra ..fort u pof n m e f al wea v the position of theelectriealltheatingqiele- 'ments.thereor hein g indicated soh eniati .ri .,-e is "an s e largedenteel View on portion ofthe superheat'er shovvn .infiliigi2;

V a :Fig. 4-is alfragmentarygplan =vievvg-of lthe stip'erheate -,;Fig. is an leridg-vievv of the, mechanisn1 vvitl1 the;v charginggarm,inzangad mowed positi ntpa b i rh' view-ban thereof I broken awaylto nrore{clearly show features view being broken-nawey to grnore eleanly illustrate the on tgueti n: "thereof is I t Fig.-': 7 is a plan view oflth'e same mecha-v nism, parts of the; view being} broken awey toqmore clearly illustrate features -threot;

Fig. 8 1 is aa sectional view :taken Lon -the F i na nl re d e e -a-n r tionab f a, device for supportingartieles to vl e-treated "Withinthe furnace,-and gc. I

FigzjlO illustrates another;formwvhich the,

8 y take. w i 'r -ex ifit -b entlyshaped artioleflis-to beytreatedf j r-Beterring-novv to -the drawingslin which I l ke num r ls, ar emp y d t l e ig a furnaces "A charger; generally. deIs ig iiated bank-l of I by the-numeral 12 :ig:jadepted to ,trgveli on handling racks generally designated- Within the furnace; 1A cooling [shed 1 5-hoi1s- 1 plurality of trucks 516 ,16" whicha e- 7i adapted to support the racks when such a c ksI areh- 'i'i'dled duri1ig tlie 1e prepe altion th'erenf fgrior insane units; The'furnace proper may be of any usual construction having the usual frame and usual heat insulating walls (not shown in. detail in thepresent drawings because the' invention does not relate thereto). One of the features of the furnaceis the mufie thereof, which isshown in Fig. 2 and indicated by the numeral 20. A pair of ridges 21 extending the full length of the muffle and a pair of apertured bracket members 22 corresponding in length co-operate' to form a cradle on which a rack of material 14 is adapted to be supported. An annular recess in the end of the muffle isdesigned to hold suitablepacking, such as an asbestos packing ring 27.

Within the muffle is a superheater 23 shown in section in Fig. 3 and in full in 'Fig. 4 whichis 'a plan view thereof. The

' superheater .23 isadapted to receive steam through a pipe 24 from a source of supply (not shown), the pipe 24 being branched at 25 to form oppositely disposed pipe sections in each of which areplacedaplurality of inserts 26 (Figs. 3 and These inserts are for the purpose of discharging dry steam into the muffle of the furnace and are preferably formed of a nickel-copper alloy 1' so that they will" not be readily oxidized by the conditions which prevail within the furnace during the normal use thereof.

' Referring again to Fig. 1, the muffle, be mg mtegrally closed at 1ts rear end, is pro-V vided at its front end with a door 30. The

dooris held in engagement with the muflle' by means of cross-arms 31, which are held in position by bolts 33-33 extending through suitable lugs on the door and'the end wall of the furnace, and screws 32 threaded in the arms 31 and adapted to have'their ends engage suitable portions of the door 1 -'The' face of the door 30 being-acorn 'rately machined, forcing it against the asb'estos packing ring 27' produces a-practica'llyv air tight seal of the muffle which is essential in a furnaceofthistype. Suitable means, such as. an air actuated mechanism indicated at" 35, is provided to facilitate raising'of the door 30 for the'purpose of-charging or removing the treated material from the niuflie as shown in Fig. 1. As shown in Fig. 2, electrical heating elements 36 of any suitable type are placed some'distance away from the muffle in order to obtai'nan even heatjthrough the muiiie wall.

' :Referring nowto. Figs. 5, 6, 7 and 8, the charger generallydesignated in Fig.1 by

g the numeral 12, comprises a main frame 40' having a plurality of wheels 41 secured thereto, by means of which the charger is moved along the rails 13. The wheels 41 on one side of the charger have integral therewith sprocket gears 42 meshing with chains 43 which also mesh with gears 44 on a shaft 46 carrying an integralbeveled gear 45. A beveled pinion 47 meshing with the gear may be turned by means of a hand wheel 48 to propel the car by means of the mechanism described. The hand 'wheel'48, together with the beveled pinion 47, is adapted to be withdrawn to the position shown by the dotted lines in Fig. 5, andmay be retained inv that position by suitable means such as a lever 49 which acts frictionally upon the pinion shaft, to permit the charger to be moved by hand without interference from the advancing mechanism. A construction identical withthat described, is 1 provided on the opposite side of the charger to permit operation fromeither'side thereof, the hand "wheel associated with this duplicate structure being indicated by the numeral 50 (Figs. 5 and 7 The charger is provided wlth a charging arm or boom gears meshing with a pair of racks which are integral with the charging arm 55.

The charging arm elevating mechanism comprises a pair of hand wheels 'and 91 integral with ashaft 92 having keyed thereto pinions 93 and 94. As indicated 1n Figs. 7 and 8 duplicate elevating mechanism is provided on either side of the charger, but

in orderto simplify the description "the mechanism associated withhand wheel 91 .(Fig. 7) will be described infldetail. The

pinion 94 meshes with a gear 95 on a shaft 96-carrying integral therewith a smaller pinion 97." The pinion 97 meshes with 'a geared portion 100 of an eccentric member 101 .(Fig. The gear 100 rotates about an axis which coincides witl11tl1e'c enter point or axis of a ball bearing 102'suitably supported in the'main frame of the charger.

"A shaft 105 supporting the roller57 is positioned eccentrigally in the member 101 and is carried aboutthe axis of the gear 100 when this member is rotated, thereby either raising'or lowering theshaft 105 and obviously the roller 57 as well. Thiscauses an elevation of the front-portion of the charging arm as shown by the dotted lines in Fig. 6' about an axis which is'between the rollers 56 and 58. By this meansthe charging arm warm} when positioned under a rack of material Imay be'elevated, in the manner described and again lowered to deposit the rack in va new position. When employing the charger the truck 16 having an .open upper portion'designed to permit the insertion of the charging arm in order to raise the rack of material is very desirable.

In order'to assist. in the handling of mate rial being treated by the process previously v mentioned hereinbet'ore; an improved material or article holding rack is provided. ThlS laCk, shown in perspective in Fig. 1,

is provided with a base 110 in which are inserted (Figs 9 and 10) suitableuprights 111. Thehollow parts to be treated, suchas the base and upright portions of telephone desk stands, designated by the numerals'112 and 113, respectively, are placed upon the uprights 111, suitable'spacing members 115 or 116 havingapertures thereinbeing placed therebetween. These spacing members keep the parts separated-so that no surfaces or adjacent-articles will touchand thus insure the; proper treatment of all surfaces, the

holes therein permitting free circulaticn of the gases inthe 'muflie, which circulation is necessary if the best results are to be ob tained in thepractice of the method referred toabove. In the operation of thefurnace the parts 7 112 or 113 are mounted upon the rack 141 which has been preliminarily placed upon one of the trucks 16. The charger 12 is then brought to a, position in front of the filled truck by the operation of the hand wheel 48 or 50, and accurately aligned so that the charging arm may be advanced by I 'means' of the hand-wheel ors61 between the uprights of the truck 16. Thearmnis then'elevated by rotating the hand wheel or 91'to raise the rack from the truck, and while in anelevatedposition it is retracted by'means of the hand wheel 60. or 61. The. charger is then moved into'position in front of themutfle of the furnace by operating the hand wheel, the door thereof is opened and I the arm advanced into the furnace The rack of material is then lowered into position upon the members 22by the lowering of the arm-by-the handwheel 90. 1" 91. The charg;

' 7 ing arm is then withdrawn by the operation of steam'into the heated mufile and simulof the handwheel 60 or Gland the muflle closed by the door 30, the arms 31 placed in position across the face of the door andsccured with the bolts 33 and the screws 32 actuated tov force :the door against the asbestos ring'27 and sealing the muffle The l l parts inserted may then be treated in'accord- 6O ance with the method described in fthe copending application referred-to above, which process consists in admitting a small amount taneously jincreasing the amount of steam.

"admitted and the'temperatu're of the mu'file.

includingone of the anti-friction ret re-rea ting the charging rrienrber through other-gases intthe furnace a expel d iby opening 1' th mu-ifle door and-a small amount Srrb'se'qiieiit ly theateuiiiulated hydre en an ef hydrdearbe 011 5 ;inserted in thefimurfletd bnrn 'eut-"theem m -uncombined oxygen. .1 After? the. 'parts have beenx completely finished or treated, the rack,on which they are supported is {withdrawn from the mliifie by 1 means of the ch argi'ng arm 'in -a manner similar to ithat described f for its insertion la'eed 'on the en the trueksfwithin the lt is fobv-" ous that the invention :is f? be lim'ited' by the specifie emb dime te and; desc ibed; but is' to be limited by :thescepeetthe appended claims.

"'PTWlrat is' l aimed isl" j V 1. "Apparatus" tori-handling material to be treated; ecmprisingg a; vlmele,a: 1 e

V a ,7, Q, i "a '11 material 'c-arrying inem-ber fi supported "solely by the fc-"arriage designed to be t tended into a treating device? ronemming j --'or ui'iload-ing ithe same,a plurality ot anti; I c frictiony elements I associated "with? the chargin'g 1 m mber, and mean 17A 7 h" I :itetractin Jthe'ehargin -a piniOI-i pGrtiOn or one or "meansrtisans 7 elements, (and mean including anotherofor elevatlng the. chargmgmember to lift the materials.

theanti fr-ic'ticn' elements V Apparatus for handling materials to be treated, comprising a carriage adapted f town to aveling wheeled i:

' extended meetsto be moved transversely ofa treating de-v vice, an antifriction memberhaving pin on port ons, a plurality of chargmgmemi bers supported by the. antifriction member,

a retaining means positioned directly above the antifriction member a pluralityof ele- .ments forseparating the charging members and having rack portions meshing with the pinion portions and means for rotatlng for moving the' charging members carry: ingthe angle."

V 1.;Apparatusfor handling 'materialslto s be treated,- comprising a carriage, a "plus "ralityof charging members a plurality of racks' fjor separating the charging members, 1 i an ,antifrictionmember for supporting the charging members and having pinion por tions meshing; with. 5 the racks, a retaining s 1 the antifriction member whereby the chargmg membersaref actuated'and the driving. pinions are "relieved of the weight otthe s charging members at all times, andmeans materials 7 through a predetermined means positioned above the antifriction member, a roller supporting the. charging members, an eccentric mechanism operativelyassociated therewith, means for actuating the eccentric mechanism to elevate the charging members, and means for propelllng the carnage.

57.7Apparatus for handling materials to be treated, comprising a wheeled carriage, a plurality of charging arms, a plurality of racks for separating the charging arms, an anti friction 'member for supporting the charging arms and having pinion portions meshing with the racks, a roller mounted in a fixed position directly above theantis friction member, a movableroller support ing the charging arms, an eccentric gear operatively associated therewith, means for rotating the gear to elevate the movable roller andthe charging arms, and means positioned on both sides of the carriage for eifecting the propelling thereof 6. Apparatus for handling materials to betreated, comprising a movable carriage,

a material carrying member mounted thereonadapted to be'extendecl into a treating device for charging or unloading the same,

a plurality of anti-friction elements opera-- tively associated with the charging member,fmeans integral with oneof said antifriction elements for moving the member longitudinally, and means for moving the axis of rotation of another of the anti-friction elements in an 'arcuate path to elevate the member.

In witness whereof, I hereunto subscribe my name this 17th day of September A. D

7 ROBERT ROSCOE.

Images