US2391214A

US2391214A - Combination coke oven door-handling, pushing, and leveling machine

Info

Publication number: US2391214A
Application number: US534500A
Authority: US
Inventors: Wilputte Louis
Original assignee: WILPUTTE COKE OVEN CORP
Current assignee: WILPUTTE COKE OVEN Corp
Priority date: 1944-05-06
Filing date: 1944-05-06
Publication date: 1945-12-18
Anticipated expiration: 1962-12-18

Description

COMBINATION COKE OVEN DOOR-HANDL'NG, PUSHING AND LEVELING MACHINE 4 Sheets-Sheei'l l v*Filed May 5,v 1944 kw A INVENTOR LA. im..

.ATTORNEY Dec.*l8, 1945. L. wlLPuTTE 2,391,214 COMBINATION COKE OVEN DOOR-HANDLING, P'UsHIN AND LEVELING MACHINE 5 Filed May 6, 1944 4 Sheets-Sheet '2 @um I.

De. 1811945. l.| WILPUTVTE CM'BINATION COKE OVEN DOOR-HANDLING, PUSHING AND LEVELINGl MACHINE 4 Sheets-Sheet 3 ww. um

INVENTOR Filed May 6, 1944 ATTORNEY Dec. 18, 1945.

COMBINATION COKE OVEN DOOR-HANDLING, P-USHING AND-LEVELING MACHINE I, 4 sheets-sheet 4v Filed May 6, 1944 INVENTOR e. www 7. N Md@ @am W `Patented Dec. 178, 1945 UNITED OFFICE GlvIBiNAT1oN, -CQK BLING, `IUSHINlASr.,` AND LEVELINGY .MA-

CHINEl OVEN DOOR-HANl f- Louis"-r Wilp'utt'e, New York,- vNQ Y., assigner "to"` vili-mutt'ell Coke Oven Corporation; .New York, 1N: fY., ay corpnrationbf Mai-ne Appliemanmay' '6; Y1944, semi No; 534.560 111` Claims;` (Cl. 2024-2481)" Therpresentinvention relates tolamachineu forl removing and replacing coke oven-doors to facilitate the cleaning thereof. Morespecically, this-- invention pertains .to a--combined coke oven doorhandling., pushing and leveling r`machine involve ing .afcarriage traveling-'on tracks disposed .paraflr lel` to a cokev oven battery fon the kcoke side there of v.and designed vsothatvvithout .moving the carriag.e'-.onc,e ,the machine Yis Vspotted `beforea given cokng chamber, the machine ,operates to ,(a) move thefdoor from :the coking, chamberk tola daorrcleanngf, position,` (b) `pushatlfie .charge'of f cokepfromthat ,coking chamber, tc) .level acharge: of coal in another, coking lchamber .and (d) `return thedoor to door-.closing position;

It `isznot' unusual. in modern .coke oven ,bat-fv teries .to-have :the coKmgchambers `and the doors: therefor of aheight .of about 13 or ,even higher. Inu-.the operation -of .suchbatteries it isvthe practice to `enfiploy'adoor--handling machine on: which. oneror twooperators are stationed Whosefduty; it-isato '.cleanthecdoorsasthey'.are moved fromA the -eoking chambers. Tofl permit these 'operators to reach both the top and bottom portions ofthe door; it Lisf conventional .practice to provide two platforms. connected :by a -.stairway. If ausingle door cleaner-is employed; -her mustl ascend this stairway to reaclf the upper platform from whichV the upper portion of thev dooris accessible to` him anddescendthi-s stairwayto reachY the lower' platformwhere the r'lower portion of the door is accessible #to 'Ihisis both time-'consuming andlarduous; n

In theope-ration` of largelbvatteries;'fornlaxiLb K' mum' efdciencyi-t is desirableto operatethe=-door Handling` machine substantially continuously;k

i. er, after-the door ha-'slbeen removed; cleaned and; returned "to one cokingchamber, the ma; chine-l is-"'immedi'at'elyY `moved to another chamber; Where these operationsare repeated. How'- Vever,l ywith coke oven' door-handling machines as heretofore"constructed,Y it is-necessary` tou'setwo door'fc'i'eaning operators; oneon eachplatfor'm",

or, if'a'single operator is'used, to employ'a push-4" ing` 'schet'zlle'V such' that'the doorehandling 'machine 1s 'disposed for aminordi'nately' long time interval before' any given coki'ng chamber tot be' push'ed since the operator must' be' allowed's'ui'- cient time to ascend .and descend the` stairway' connectingthe platforms so he can clean 'both thet'op and'l'ower portionsv of thedoor. F1'1'rthe1L morefin such machineswthe upper platfor'ni'i's usually, disposed intermediate thetop and' botL torn of the door,.interf ering,vvitl1` the satisfactory cleaning ofthe intermediate portion ofthe door opposite Vthis platform.

It. is an object'of this invention to provide a door-handling machine which 'is constructed and'` designed'to facilitate 'cleaning'of the' door, per# m'itting. the accompli'sll'm'ent of this task 'bya` single dperator more quickly 'and efficiently' than with prirknoWi designs of door-'handling ma' chine's'.

in vvhich'workrnen on the' machinea're protected against' 'the radiant 'heat exn'ana'tingl from 'the' falcev of the 'hot pusher'vvhen it is retracted from la' cok'ing chamber.

StillA another objectof'th'e inventionis to' 'proa vide 4a co'rn'b'ined"l coke oven' door-handling', push-'- ingY and levelingv machine of durable' construction, which machine', once 'spotted before a givenc'okA ing chamber.' function s'to remove the door from 'that chamber, push the coke' therefrom, replace the door,` and' level a charge 'of coal in another" coking' chamber,'a' 1l 'Without requiring any move-2 ment 'of 'the carriage on which these 'instrumentaliti'eS are mounted'. Still another Obj'ectof'th'e invention'i's 'to provide su'ch"combined cokeoven" door-handling,H pushing and leveling machine :with facilities 'for 'quickly' and efficiently cleaning thedoor'b'y' a' single operator after it is removed" 'from the coking'chan'iber, which facilities-V conserve the 'energy ofthe operator vvhosedutyv it' is to'cl'e'an the door.

Other objects and advantages of this-v invention' will be apparent from' the 'following' detailed descrption' thereof'.

vThe present invention coml'ari'sesr essentially' a coke oven doorhandli'g machineinvolving a' carriage, a door-engaging head onthe Acariavge' movable to engage and carry the' Weight ofthe door' and move' it madam-cleaning position; and

a vertically' movable platform or'elevator 'on' the carriage disposed vnear the door-cleaning posi'' tion'. Movement. of this platform or elevator'is under the vc'on'tr'olof"the operator' whose duty it is:A

to clean' th Y l the' platform or" elevator, can' move' it 'to any desired level 'to' effect' ready and efcient cle'arrJ ing. of 'the do'orthroug'hout une entire4k height thereof.

`A'more 'specic embodiment of this' invention comprisesa carriage movable on tracks running parallel; tothe' length of'y the coke loven battery' on"the"coke'Y side thereof, a 'reciprocating ramil on' thez carriage.' a door-engagingr lhead pivotedl onl theA ram, a pusher disposed inlongitudinal Another object' of this' invention' is' to provide" f a combined doorh'andlin'g `.and pusher machine' e door."V Thus', the operator,/While'on alignment with the door-engaging head when it is in position to engage the door of a coking chamber, operating mechanism for the pusher and ram constructed and arranged so that when the ram is retracted the door-engaging head carrying the door is swung through a 90 arc to adoor-cleaning position, thereby moving the head and door out of the path of movement of the pusher and permitting entry of the pusher into the coking chamber to push the coke therefrom. This specific construction may -be and preferably is combined with a vertically movable platform or elevator on which a single door cleaning operator may be stationed, as hereinabovedescribed. Furthermore, the machine may lbe and preferably is provided with a leveler disposed in spaced relation to the pusher so that once the machine is spotted before a coking chamber the door may be removed therefrom,the door cleaned, coke pushed from the chamber, the door returned to door-closing position and a charge of coal leveled in a different coking chamber, all without moving the carriage from the aforesaid spotted position.'v Preferably, a pivoted shield is disposed on the carriage to substantially completely cover the face of the pusher when it is retracted from a coking chamber to shield the operators on the machine from the radiant heat emanating from the face of the pusher. This shield is provided with operating mechanism to automatically elfect movement thereof out of the path of movement of the pusher upon initiation of movement of the pusher into a coking chamber. In the accompanying drawings forming a part of this specication and showing for purposes of exemplicaton a preferred embodiment Vof this invention, but without limiting the claimed invention specifically to such embodiment:

Figure l is a side elevation of a machine embodying the invention, parts being broken away to permit showing ofthe machine on a somewhat larger scale than would otherwise be possible; A Figure 2 is a front elevation'of the machine shown in Figure 1 with the door shown in door cleaning position and the shield in front of the pusher omitted inthe interests of clarity;

Figure 3 is a plan view 0f this machine, parts being broken away in the interest of clarity;

f Figure 4 is a side elevation showing a portionof the ram and of the frame carrying the doorengaging head, which frame is pivotally secured to the ram; f

Figure 5 is a vertical section taken in a plane indicated by the line 5-5 of Figure 3, showing the operating mechanism for effecting the swinging movement of the frame carrying the doorengaging head;

Figure 6 is a fragmentary side elevation showing the mechanism for effecting swinging movement of the shield disposed in front of the pusher; and

Figure 7 is a fragmentary front elevation of the shield disposed' in front of the pusher.

The arrangement of the main parts of the machine and the relationship thereof to the coke o ven battery is best shown in Figure 3.

of a door-cleaning operator can be moved to any desired height to facilitate cleaning of the door when it is moved to door-cleaning position shown in dotted lines on Figure 3. Each of these main parts, together with the operating mechanism therefor, will be hereinafter described in greater detail.

Referring to Figure 3, it will be noted the coke oven battery is of conventional construction and comprises alternating coking chambers and heating walls, indicated by the reference characters 1 and 8 respectively, shown fragmentarily in this view. The mouth of each coking chamber is adapted to be closed by a door 9, which may be of. any conventional design such as the well known self-sealing doors, and which has It will be noted from this figure the machine near the upper portion thereof a leveler opening I0 adapted to be-closed by a leveler door I I. The ends of the heating walls are provided with the usual armor or flash plates and with door frames I2. Running parallel to the length of the battery, as shown in Figure 1, are tracks I3 on which travel the wheels I4 of the carriage I5 of the machine. In Figure 1 of the drawings a motor IB is shown for driving a shaft I 'I, which in turn drives through suitable gearing connections not shown, the wheels I 4 traveling on track's i3 to move the carriage from one spotted position before a coking chamber to another such position before another coking chamber.

Disposed on the carriage I5 are lstandards I8 in which are mounted rollers I9 for supporting the weight of and guiding reciprocating ram I. The ram is shaped as shown in Figure 4, i. e. so that the forward portion 2U extends below the rear portion 20'. Rear portion 20' is confined against movement in a vertical direction by the rollers I9 shown in Figure 4, and against movement in a horizontal direction by rollers 2I (Figures 3 and 5) mounted so as to engage the sides of the ram. The bottom of the forward portion 20 of the-ram rests and travels on the guide roller 22, suitably journaled in bearing supports on the carriage.

The forward portion 20 of ram I is provided with upper and

lower bearings

23, 24 for the pivot pins 25, 26 on one side of the frame 2. As will be seen from Figure 4, pivot pin 25 is disposed at the lbase of, frame 2 and pivot pin 26 extends from a point of the frame somewhat below the top. The frame 2 is thus pivotally mounted on ram I, so that it can swing in

bearings

23, 24 through a 90 arc, i. e. from the full to the dotted line position shown in Figure 3.

e Reciprocation ofthe ram I is effected by a connecting rod 28 having one end 29 pivotally secured to the ram I and the other end pivotally fastened to one end of a lever 30. The other end of lever 30 is pivotally mounted in the channel beam3I on the carriage I5. A piston (not shown) of hydraulic cylinder 33 mounted on the carriage I5 is connected by a piston rod 32 to crosshead 32 which in turn is connected by rod 34 to lever 30; crosshead 32 is movable in guide 33. Reciprocation of the piston rod 32 by the hydraulic cylinder 33 effects swinging movement of the lever 36 about its lower pivot, thereby reciprocating the ram I through the connecting rod 28.

The door-engaging head 3 is provided with top and bottom pivoted hooks 35, 36 for engaging the doors 9 to lift and carry the weight of the doors. Movement of the hooks 35, 36 about their pivots is effected by suitable mechanism which is conventional and is not shown on the drawing in*ftheinterestsfofeclarty.' When/these hooks are :actuated -to vengage andi lift the door the sealbetween the doorand door 4frame :is broken andthe #weighto'f the f door transferred toethehooks onth'e door-head f3.

For-effecting swinging movement of :the frame Y Zaandftheassociated head1-3 carrying f aidoorfS-:as

ram I-'is retracted,the.mechanism-shownlin Fig-y uresJ 3,-f4farid 5- may be A employed.. This 2 mech anism comprises a y connectingA rodfMl `which ihas.

an intermedi-ate portion ofi. frame .121- and has the other'end-'pivotally fastenedito arm-1420i a second' lever'.- secondlever is.L shaped inithevform. i ofabell erankfassshown inFigures 4-:and.'5;;the

intermediate portion 43 thereof isi-:.pvoted- J on pin 44 disposed in suitable bearings-on the ram I". The-other arm 450i thebellcrank lever is provided with a camyroller VL4B al-cam'tracki 41I,`xed1t0 cross barsi48. (seeisFgi) of the carriage. 'This cam track is. disposed :iin: -a horizontal plane and comprises two slinear. l or straight portions-1495550 connected. byr an arcuate orcurved portionSI (FigurelS), Itlisimportantf toI note -the cam. track is fixed to the.l carriage. .and do'eslnotmove'with :ram Ifas bellcranklever 4Z-fand its associatedrnechanism hoWeveL/moves'with therami I Mounted on'ram I-are two stops 52;

hereinafter.

Insoperationf-withtheram I in positionsuch that-thefdoor-engagingV head l3 `engages .the door` in ^a "coking chamber,7 the. cam roller #16:. is. positioned in ther'straight portion 49 ofthe camftrack It'lwithI the'ilever arm- 42V in contact Lwith; stop 53;"as-"shown intheposi-tionfof lever. arm42 indicated by reference character AlinFigure 3;V the fram moves from'frig-htto left Aviewing {Elmira-3,'thefcam roller 46 travels in the straight `'horizontal portion49 of the cam track` 41?. During theinitial portion. of the .movement there is no change. in fthe v'relativeposition of: thelever arm 142 and the lconnectingrodill'll .sothat .no swinging movement is impartedtoftheframe;2. Upon V furtherA47 movement of the 1 ram .i I the. cam roller -116"-^re aehes-the 'curved portion .5I .ofil the cam tracl,f-which-causes the bell..=cranl 1` lever to move about its pivot from right to left,f.view ing rFigure L3". 'In the continued. retractionof the rami' Ifthe`r bell crank. lever' -is swung. about ...pivot 441unti1armv-i42 -engages the r stop 52; :the :bell crank #remaining in Y the position indicated in dott-edilines in Figure 3.1asithe. camroller travels onethelstr-aight por-tion 50.of `the camstrack. `The afore-fdescribed movement ofzthetbellcrank,lever 42-L about :pivot 44 as the Vcam: roller .moves through portiorr 5 Iof the camftracki'movesthe-connecting. rod 40relative tothe-ram Iand-effectsaswingings-off thefdoorl-head through a; 90 :are: from 1a position-directly: in front :oflthe coking.,chamber to winch^theliframef carryingf; the doorzheadearid The upper-por-V tion ofthe head-:is -suspendedthrough a suitableV ewhich travels inv it is reciprocateid;

-53 shown in dottedllines- .on Figure,v thefunction of which .will be. described door have beenmoved upon-initial: 4retractionioi the .ram Ato the dooi'ecleaning?A position :shownin dotted linesiinzFigurLer.. Upon-.completion of the retraction movementf Ithe ram I,':lever:42.isfin1 position. indicated;l by. lreference Acharacter B1-on.

Figure 3.

When.the ram left to right, .toswing .the ffrarne* carrying-.fthe

door head i andy door 1 from. doorcleaning.:position. shownin dottedflines to the fullelinezpositionLinfront. ofthe cokingfchamber. :Continued move'- :mentV of the.ram;Ilbrings the doorintdposition.

to close thecokingtchamber opening.

Mounted on the carriage .oppositefth'e door when elevator. cage 5.6..V

bolting'to theframework of thecarriage I5; Disposed in the .Cage 611s .a.vertical1y..movab1e plat. form. 55 arranged to be raised andcloweredlwithin the. cage. 6 under; the control; of an operatorrstationed. on .this platform. AOne suitable.mechanism f or eiecting such 4raising and lowering I is -..shown inFigure 2 of the drawings. fIt comprises-a fixed supporting .member 5.6, .secured tothe bottom of l the platform .andfextending downwardly therefrom. `A hydraulic.` cylinder. 151:: is mounted on the carriage beneath .the platform 55 vand vis .pro-- vided with a pistonhaving journalled. in .theupper portion .thereof a .pulleyf58g A chain or ,Wire rope:-

59'has one end securedtothe xedstandard.; and the other endtoa-xed collanmember ISD secured'tothe cylinderi'l oni-,he carriage. .The intermediate portion of .this chain orfropefpasses over the pulley 58. movedupwardly the. pulley` functions to Vcause' the wire `rope .59' to travel thereover inaccunterclockwise direction, effectingraising of the platform y'55. Operation ofthe hydraulic cylinder to cause thepiston to descend causes the wire rope to travel thereover.in.a;cloclrwiseidirection-to lowerv the platform 55. Y

.The admission of pressure fluid to the hydraulic cylinder-is. controlled `by valve 60 of anysconven-Y tional type, disposed. in the elevatori cage @under the control of the operator. von the platformfso that by. manipulation of thisI .valve they operator can effect raising-or lowering of the. platform as desired. .Since-the. operator'can 'determinelthe position to which theaplatiorm ismoved, hecan dispose `the platform .at any ydesired `height'i'to reach. anyy portionof the door: to effect .cleaning thereof. If the operatorso desires,V lhe can arrange tov have-the platform. ascendior descend slowly while he is cleaning the door,;thus effecting the cleaning while theplatform isiin: motion.

The pusher 4. may vbe of conventional shape, having theforwardzportion of va height rapproximately equal .to the height ofa eoking chamber and 4havinginclined .sides 6I,v .62:(Figure`1) connecting the forward portion Ywith' thelongitudinal beam 6.3 of the. pusher. Thissbeam..is.arranged to. travel. betweenrollers .64i 6.5: mounted instand` ardsLIIy secured tothe carriage I5; .Reciproca-v tion of .thepusher v4 ymaybe eifected by .a motor shown conventionally at.; 51, .which vthrougl'i a reductiongearing drives ageart meshingwith teeth 69 on the underfside of. thebeamiii3.`

,A shield '.10 isA pivotally .mounted :on .the scar--A riage.: to cover. the faceofthe pusher@ when K:it

is'.reciprocated;in the oppositev direction, the movements :hereinabove described are.rever`sed,'the1bell crank lever and :connecting rod- .40.' being. fmoved. as :the 'Cam' roller-.moves throughS-the:portion-5I;l of the cam..track, from.

it is disposedin'door-cleaning y osition,.ast shown in dottedlinesrof Egures'2 and '3,` is thel This cagey may be .denne'dbyf suitable channel barssecured lasby weldingorv Thus,Y when fthe .piston I iserator who may be on the platform 1I disposed in front of the coking chamber, from theiheat emanating from the face of the hot pusher. f The shield is so dimensioned that it substantially completely covers the face of the pusher. It is pivoted at 12 (Figure 8) in supports 13`secured to cross bars 14 forming part of the structural framework of the carriage I5. A connecting rod 15 is secured to one end of the shield10,land has the other end secured to a lever 16 pivoted at 11 in a support 18 and having its free end provided with a roller 19 arranged to engage the inclined portion 6I of the pusher when it is in the retracted position shown in Figure 3.

A rope or wire cord 86 (Figure 6) is fastened to the connecting rod 15, passes over a pulley 8I and connects with a counterweight 82 disposedV in a suitable housing 83. The counterweight 82 effects swinging of the shield 10 about the pivot 12 from the'path of movement of the pusher when the roller 19 no longer engages the inclined side wall 6I of the pusher due to movement of the pusher into the coking chamber. Upon retraction of' the pusher from the coking chamber the inclined side 6I engages the roller 19 to swing the shield to a position in front of the pusher face, as shown in Figure 3.

A leveler bar is mounted in the upper portion of the machine in suitable standards, indicated generally by the reference character 84, each standard having mounted therein lower supporting rolls 85. Also mounted in these standards, as shown in Figure 2, is a drive shaft 86 having mounted thereon a pair of flanged rolls 81 for engaging the upper corners of the leveler bar. A drive sprocket 88 is keyed to the drive shaft 86 and a chain 89 (Figure 1) passes over the drive sprocket 88 and around an idler sprocket 88a located toward the rear of the machine. The ends of the chain are fastened to the leveler bar at 88h. As appears from Figure 1 the lower part of the chain rests on the leveler bar 5 while the upper part of the chain rests on idler rolls 88C mounted on shafts in standards 84, each shaft also having a pair of flanged rolls thereon engaging the upper cornersof the leveler bar. Drive shaft 86 is driven by a motor Si! through suitable gearing (not shown). Thus, through the sprocket 88 keyed on drive shaft 86, chain 89 is driven to move the leveler bar into a coking chamber. Reversal of the direction of movement of the chain by reversing the motor retracts the leveler bar from the chamber. The aforedescribed mechanism for reciprocating the leveler bar represents a well known form of drive for such bar, and per se is not a part of this' invention. Other suitable drive mechanism may be employed for this purpose.

It will be noted from' Figures 2 and 3 that the leveler bar is spaced horizontally from the pusher a distance such that the pusher is in position to push a charge of coke from one chamber while the leveler is in position to level a charge of coal in a different coking chamber without moving the carriage I5. In the embodiment shown in Figure 3, the distance between the longitudinal center lines of the pusher and the leveler is the same as the distance between the longitudinal center lines of two coking chambers separated by an intervening coking chamber. The spacing of the pusher and the leveler bars may be different than that shown on the drawings; if desired,

theA leveler may be positioned relative to the pusher so as to permit pushing a charge of coke from one coking chamber and level a charge of coal in a contiguous coking chamber without moving the carriage, or level a charge of coal in a coking chamber spaced, say, two or more coking chambers from that from which the charge of coke is being pushed. The spacing shown on the drawings, however, is preferred.

In operation, the carriage I5 is spotted before a coking chamber 1. Ram I is then moved so that the hooks 35 and 36 are brought into engagement with the keepers on the door and the mechanism on the door head is actuated, as is well known, to release the tension exerted by the latch bars holding the door in place and to break the seal between the door and door frame. Thereafter, the ram I is retracted by actuation of hydraulic cylinder 33 as hereinabove described. During the initial movement, frame 2, head 3 and door 9 move in a straight line away from thel coking chamber. On continued retraction, cam roller 46 enters curved portion 5I of cam track 41 swinging, as hereinabove described, the frame 2, head 3 and door 9 through a 90 arc to doorcleaning position. The operator on vertically movable platform 55 cleans the door, shifting the position of the platform by manipulation of,valve 60 so that he reaches all portions of the door requiring cleaning.

While the operator is thus engaged in cleaning the door, another operatordisposed in the control cab (not shown) of the carriage energizes the motor 61 to cause the pusher 4 to push coke from the coking chamber from which the door has just been removed; It will be noted that the swing of the frame, door head and door to doorcleaning position removes these parts from the path of movement of the pusher into the coking chamber. As the side 6I of the pusher moves away from the roller 19 the counterweight 82 eifects swinging of the shield .10 out of the path of movement of the pusher. Upon retraction of the pusher, side 6I engages roller 19 to swing the shield 10 back in front of the face of the pusher. Movement of ram I toward the coking chamber causes the frame 2, head 3 and door to be swung back to position in line with the door opening and, as movement of the ram I is continued, the door is brought into sealing engagement with the door frame.

Without moving the carriage I5, and during or immediately after the above-described operations, the leveler barV 5 may be reciprocated by its actuating mechanism hereinabove described to level a charge of coal previously delivered t0 the coking chamber into which the leveler bar is positioned to enter.

It is to be understood that this invention is not restricted to the present disclosure otherwise than as defined bythe appended claims.

What is claimed is:

1. ln a coke oven door-handling machine, in combination, a carriage movable on tracksI running parallel to the length of the coke oven battery, a reciprocating ram, a door-engaging-head pivoted on said ram and arranged to engage and carry the Weight of a door, means for reciprocating said ram to retract the head and door carried thereby from a coking chamber normally closed by said door and to return the head and door to door-closing position, means for swinging the door-engaging head and the door carried thereby through a arc during theY said retraction of said ram to move the door to a door-cleaning 12,392,224 `position, ya Avertically movable platformen :said forrnso .that an=.;operatorithereon. canreadily carriage near ethe said ldoor-cleaning position, fand.' means'. toY raisezand' lowerv theA plattorm; so ythat'tan operator may readily cleanithe doorfwhen moved tor said door-cleaning position.v

2.:In a coke oven door-handling rnacl'iine,- in

cleaning position, a vertically movable platform kon said carriage near the said door-cleaning-position, `means to' raise and lower the* platform isofthat an 'operatorthereorr can readily clean* the door when moved `to said. door-cleaning position, apusher on thearriage and a leveler on the carriage spaced from the pusher so that without moving the said carriage the pusher can push coke from one coking chamber and the leveler level a charge of coal in another coking member.

3. In a coke oven door-handling machine, a carriage, a reciprocating ram on said carriage,

a door-engaging head pivotally mounted on said combination, a reciprocating pusher, a pivoted shield infront of said pusher adapted to substantially completely cover the face of the pusher,

and means for swinging said shield out of the path of movement of said pusher upon initiation of movement of the pusher into a coking chamber.

5. In a coke oven door-handling machine, in combination, a carriage, a door-engaging head on said carriage movable to engage and carry the weight of a door and move the door to a doorcleaning position, a reciprocating pusher, a pivoted shield in front of said pusher adapted to substantially completely cover the face of the pusher, and means for swinging said shield out of the path of movement of said pusher upon initiation of movement of the pusher rinto a coking chamber.

6. In a coke oven door-handling machine, in combination, a carriage, a door-engaging head on said carriage movable to engage and carry the weight of a door and move the door to a doorcleaning position, a vertically movable platform on said carriage disposed near the said doorcleaning position, means to raise and lower the platform so that an operator thereon can readily clean the door when it is moved into said doorcleaning position, a reciprocating pusher, a pivoted shield -in front of said pusher adapted to substantially completely cover the face lof the pusher, and means for swinging said shield out of the path of movement of said pusher upon initiation of movement of the pusher into a coking chamber.

, '7. In a coke oven door-handling machine, in combination, a carriage, a door-engaging head on said carriage movable to engage and carry the weight of a door and move the door to a door-cleaning position, a vertically movable platform on said carriage near the said door-cleaning position, means'to raise and lower the plat- `combination, a carriage, a door-engaging head konsaid' carriage'irnovable to engage and carry -thefweight-of: a doorand move the-door to a-d'oorlol cleanlthe door-"whenmoveii to said' door-cleaning a pusher: onrthecarria'ge and a leveler onrthecarri'agel-spaced? from the pusherso that twithoutmoving the said carriage the pusher can pushA coke from one coking chamber andthe level'erflevel'a charge' of coal invanother coking chamber, a pivoted shield in-frontof said pusher `adapted 11b-.substantially completely .cover the face" o'f' the' pusher, and means for swinging said shieldloutfof the path-ofvmovement-of said pusher upon. initiation of movement of the pusher into'a coking chamber.

8.. In- .a combined coke ovenv door-handling,

pushingv and leveling machine, in combination,-fa

carriage; a reciprocating ram on said carriage; a door-engaging head pivotally mounted on said ram movable to engage and carry the weight of the door and upon reciprocation of the ram away from a coking chamber normally' closed by said door swing said door through a arc to a doorclosing position; a vertically movable platform on said carriage opposite the door-cleaning position; means to raise and lower the platform so that an operator thereon can readily clean the door when it is swung to said door-cleaning position; a reciprocating pusher disposed parallel with said ram and positioned in longitudinal alignment with the door-engaging head when said head is in `position to engage a door on a coking chamber, movement of said door to theaforesaid door-cleaning position removing the said head and door `from the path of movement of the pusher when it moves into said coking chamber to push the coke therefrom, and a leveler bar on the carriage spaced from the said pusher so that without moving said carriage the door may be removed from the coke side of a coking chamber, coke pushed from this chamber and the coal leveled in another coking chamber.

9. In acombinedcoke oven door-handling, Pushing and leveling machine, in combination, a carriage; a reciprocating ram on said carriage; a doorengaging head pivot-ally mounted on said ram movable to engage and carry the weight of the door and upon reciprocation of the ram away from a coking chamber normally closed by said door swing said door through a 90 arc to a doorcleaning position; a vertically movable platform on said carriage opposite the door-cleaning position; means to raise and lower the platform so that an operator thereon can readily clean the door when it is swung to said door-cleaning position; a reciprocating pusher disposed parallel with said ram and positioned in longitudinal alignment with the door-engaging head when said head is in position to engage a door on a coking chamber, movement of said door to the aforesaid door-cleaning position removing the said head and door from the path of movement of the pusher when it moves into said coking chaml ber to push the coke therefrom, a pivoted shield in front of-said pusher adapted to substantially completely cover the face of the pusher; means for swinging said shield out of the path of movement of said pusher upon initiation of movement of the pusher into a coking chamber; and a leveler bar on the carriage spaced from the said pusher so that without moving said carriage the door Vmay be removed from the coke side of a ooking y chamber, coke pushed from this chamber and the coal leveled in another coking chamber.

10. In a coke oven door-handling machine, in combination, a carriage; a reciprocating ram; a door-engaging head supported on said ram so door-cleaning position, and means to raise and 10 lower the platform so that an operator thereon may readily clean the door when moved to said door-cleaning position.

11` In a coke oven door-handling machine, in

combination, a. carriage movable lengthwise of 15 the coke oven battery, a reciprocating ram mounted on the carriage, a door-engaging head carried by said ram and arranged to engage and carry the weight of a door, means for reciprocating said ram to' retract the head and door carried thereby from a coking chamber normally closed by said door and to return the head and door to door-closing lposition, said head being swingably mounted on said ram to a door-cleaning position, a vertically movable platform on said carriage disposed near the said door-cleaning position and means to raise and lower the platform so that an operator may Areadily clean the door when moved to said doorcleaning position.

LOUIS WILPUTTE.