US1873547A - Apparatus for positioning structural members for drilling and like operations - Google Patents

Description

4 Sheets-Sheet Aug. 23, 1932.

APPARATUS FOR POSITIONING STRUCTURAL MEMBERS FOR DRILLING AND LIKE OPERATIONS Aug. 23, 1932. H, H, McCLlNTlC 1,873,547

APPARATUS FOR POSITIONING STRUCTURAL MEMBERS FOR DRILLING AND LKRoPERATIoNs A Filed June l, 1928 4 Sheets-Sheet 2 INVENTOR ug. 23, 1932. H. H. MccLlN-nc 1,873,547

APPARATUS EOE PosITIoNING STRUCTURAL MEMBERS FOR DRILLING ANU LIKE OPERATIONS f Filed June l, 1928 4 Sheets-Sheet 3 ug. 23, 1932. H MCCUNTIC 1,873,547

APPARATUS FOR POSITIONING STRUCTURAL MEMBERS FOR DRILLING` AND LIKE OPERATIONS Filed June l, 1928 4 Sheets-Sheet 4 1251 Z4 f l Jog ,205 ...705 ,209 .ZIO

Patented ug. 23, 11932 inn-Jima fHovvARnlH.V MceninT1o,-..oFiPITmsBUReH, PENNSYLVANIA, nifssrenon To Meerlardy MaRsHALL ycoMPAnY, :or 'Prr'rsanatoria,nimmerummm,l A CORPORATION" on PENNSYLVANIA ABPAaaA'nUsL non Posmionme" 'sTUCTURjAFMEMBERs Fon`-nRInINe -ornmrnmnsf r @This invention-'relates toaanapparatusdfor een-tering, rholding tand turn-ing struetural members topermit' drilling; pnnelnnggrivetf ing; or-like 'operati-ons thereon. l n

According to thepresentniethdd of drillinglargeestrnetural shapes, if the lwolik xrnust ibe movedabout the drill by hand,'-vvhieh-is 'slfow,

"naeeurategiand expensive. 'H'eretoEoregfit has bers, regardless lof Atheir T`WeightLand size,

whereby the drilling and like v"operationsrna'y o befoeformed expeditiouslygf'precisely, fandat a minimum cost.

A'Ano'ther" objeetisE to proviidoalniahinef-of thisY fcharafeter capable Aoi"lon'gitudinalneovement,y providedj with power-operated jacks-to tail; stoks provided Withl novelwvorkeen'gagingzchneks.

A urtherlobjeetis-'to `provide s'ueh annahinefwvherein one of theehu'eksnray beturned 'to-'rotate the Work and may; inf/a noy-alemannerfbef-seeured'indiil'eren` positions in the pat-h ofareirele. Various'a'dditional' obj eets andadvantages wvillf bepointed outJ orbecome'iapparentfrom a consideration oftheffdescription-following tafken in connetion :Withithe accompanying drawings illustrating -a practical embo'diment. Y

.'Insaid drawings: i

llis aside4 elevationalviewvfthe inventionl inv Work-'engaging position s 'VFi-g. 2 is 'atop planyiew thereof,4 With the head'and" tail stoeksremoved;

'FigfBis yan enlarged vertical sectional view ofthe Ihead stock,` partly brokenfaway to' show details; 1

fFig; 51is1any enlarged faceview, showin-gene otthenvorksengagingl chucks engagement i i 1 fFigzs 6" isia'n' enlarged' Vertical sectional view through one of the lifting jaoksysai'divievv being taken on lineVIe-VI -offFigJ2 pand -f-Fig.l 7 .isis fa Adiagranimatie vvewy. nshowing limitingnneansr for the lifting jacks.k

. "fReerringto 'xthe i-olravvings,l 1'0 ides'ignates 'generallyf'a' bed 'orsrmovablesupporting-body com@rising,A asl illustrated,y a east metal'- str-uctureI including side-members 11, eonnecte'dat intervals by transversewvebs orernembers-'1`f2. The bed s :is mounted :forY longitudinal v m0vement i aiponz azvseries ofl rollers J3, the latter beingnjournalledi on transversely extending shafts: 14 a proj eeted through bearings`v 1155 'of base mnembersszl placed `ion"L the dioor orfother support. Y .At 'itfheir *inner'fendslj rollers 13 haveiperipheral flanges `which overlap!` the;-` inner e "ffesjoftheflowver portions @18 `voftheiisi-de members ll, vth-us.-zguarding 'against :lateral displacement( of' the bed l0. AThe:aunider y`surfaces :offthe f angles 1' 8 aref eentrallyprovided Wthflongituelinally extendingrrows offraek teeth i19, Idesignedfto'mesh with pinionsfor gear: Wheels i20fkeyed@ to a fshaft 21. jou'rnalled insuitable bearings. Shaftz21 is driven ff-rom aeinotor;preferablya reversibleveleetriei mo# tor-1 22,1Vthrough1thef medium of speed;l reduc? ingagearing, butgenerallyshovvn. VItvvifll be "real-ized f that With the .f niotor'1'22 operating,.;gear wvheels20 through' theirf engagement with racks 19 will cause'l'ongitudinal inoveinentior shifting ofr'thefbedlO.

llfheiwork, for j*which an H #bea-m' ris.' represen-tative,2is :adapted tobel engaged by-ehueks 25 of raf head steek :126;1and f a tail fstoekff27 .1 Said stoeks ..261xa11'd v"127 :have many s' similar parts for ffinstan'ce, 7':arriages 128 svvhih :lare sl'ida'ble-al-ong the bedlOiand: have depending. hook flanges i'29 v :engaging the f iupper 'anglesv orlheads 130 ofrthes side members ll. -EachV otherwise 'astenedfthereto'fat 32, saidi braeke g 1 ets-"eaeh;sf'ournallin aa-fshafteada Jted'zto fFigA, 1s .an enlarged side elevational ViewU J g r befturnefd tlfirough the' operationf'ofwa'hand Wheelfgfl. fKeyed jtothe' shaftf'1 is lfa; pinion Y pinion-jor;fgearvwheelf 'rigid oniashort'fshaft 37, ournalledlin bracket 31, and which shaft 37 also has a pinion or gear wheel 38 keyed thereto. Gear wheels 38 are in mesh with rack teeth 39 provided throughout the length lof one of the heads on its undersurface.

Journalled in the bodies 43 of the carriages f 28 adjacent their upper portions are shafts Y "er's'pindles-44f Spindles `44gmay have heads 20 fchncks' 25 and carry diametri@ blocks 50 prokand cap screws 605. Y

or piates 45' to'which drums V46/are secured 10 by ol'ts`47. The drums 46 extend between the inner end vof thte bodies43 vand vertical,

wfa'lls43aiintregral therewith, and which walls mount short shafts 48 on which rollers' 49l are journalled and arranged incontact with the periphery of drumsv46 so as to assist in sustaining the .weight rand vstrain f imposed thereon, especially under thef exceedingly-A `heavywork in connection with which the machineisworked. Y. i i

Said drums'k 46 constituteV the bases of vided with centeredlongitudinal T-shaped slots 51 extending completely therethrough.

T-shaped studs 52 occupyand ,are slidably Vmounted in said slotsV 51. Adjusting-screws 53 are centrally journalled,as at 54,'in the Vblocks vand on opposite sides .of their journals 54 have opposite screw Vthreads 55 and 56, .onehalf `of said threadedportions beingv receivedk in semi-circular recesses 5605k 'of blocks 50;; Thestuds 52 rest on the threads 55'and 56;-andfhave corresponding threads meshing therewith, so that, according tothe i direction of rotating screw 53, the' studs" 52 will be moved closer `together or farther apart. v To permit rotation of said screw53, it is provided with square sockets 57 vto accommo'date a keyor turning tool.

r ducedat their overlapping portions so that the upper and lower faces of .the remainder thereof will be in the same plane. Jaws 61 are retained on the members 60 by washer .60a

In order to prevent collapse` or'displacement of vthe jaws 61 when not engaged with work, and particularly when moving relatively thereto, each upper jaw 61 has `a generally arcuate spring63 fastened'theret'o at 64 and' which partially surrounds andre.-

siliently'supports the lower jaw from below.

In addition, fixed lugs or stops 65 are provided ont-he. blocks 52 which preclude lowering movement of the vupper jaws 61. Itwill accordingly be seen, especialy fromVV Fig. 5, that when the shaft 53 is turned in one direction, the threads 55 and 56 will move the studs 52 toward each other,L so that through' the contact-of the free ends of the jaws 61 with thework 24theyfwill spread and engage inl corners of the H-shaped beam or work 24, thus centering and tightly gripping and holding it. In order to release the work, said arealways -free for rotation to accommodate adjustment of the w'ork. k'The drum andy chuck of the head stock 26, however, are adapted to be securely locked and held in different positionsaocording 'to the particular dri'l'lingfor operations to which thework is to be subjected. In this connection, the H-beam 24 is adapted to occupy four different` positions with Yrespect to the drilling tool,V asconventionallysuggested at 66, and, therefore, four locking recesses 67'are provided in the drum 46 of the head stock. Adapted to enter. said vrecesses 67 isa boltior rod 68which is slidably mounted in suitable bearingsl 69 on theihead stockfbodyV -43. y Screwedtothe bolt 68v at 7() are spaced collars 71l and 2.2An lexpansive coil spring'73 is vpositioned onshaft` 68, between collar 7 land a bearing69, tou'rge the projection of bolt68 so that it willv automatically enter one of the recesses: v67'. Ywhen brought into register therewith. 'A retracted lever to move bolt recesses 67 4is provided at7 4, such lever having a yoke 75 engagin'gthe bolt 68 between the collars71 and 72 'and having one of its arms76l extended and pivotallylbolted or otherwise fastened, at 77, to an anglebracket 78 secured to the head stock body43.

,-{In addition, the spindle 44 of the.r head stock hasajworm` wheel 8O keyed to its' outer endvand which is in mesh with a worm 81 located at the top thereof. Worm 81-has a vhand wheel `82f secured thereto.' ASaidjworm wheel 80and worm 81 are housed within ja-nd Ypro-Y 6.8'outiof, the Y tected by a suitable sectional 'casing 83 fastened tothe headstockbody 43. Through the turning ofthe hand wheel 82 andintermeshing ofvgears 81y and80, when 'bolt 68 ,iseretracted, the spindle 44 of the head stock may be turned "so las to correspondingly turn its chuck, the work held thereby, randthe chuck and spindleof the tailstock; Y l y f v V1In order to form a supporting meansto initially receivef'the work or l-l-beam v24 and to adjust it vertically for engagement by the chucks of the head and tail stocks, a plurality of lifting acks are provided at 84.y Siaidjacks may consist of Vsupporting.heads or, plates85 on which the work is adapted to rest and'which have depending lifting screws 86ri`gid therewith. Also depending 1from Vthe plates 85 are guide members 87 s lidably disposed Vin housing 88 suitably mountedbetween the side members 11 ofthe. bed. l. Co-acting withfthe lifting screws 86 zare rotatable worm wheels Y 89 having extended hubs 90 providedV withan interior worm thread meshing with the thread ofthe screws86.: Worm wheels 89 ro- -tate-e`nl ball bearings A 59 2 4"snqpported iwithin the -casing 88 and-are? heldeagainstlvertical displacement by'hold-downfpla-tes and-casing-"i942, i v' rl i nforder to rotate` the# worin -wheels 89- in 'Lrnison'tfeitherJ raise orllow'er--the screws-186 fa-Idmccordingly the -jacks and `the Twork,\a `power shafti L95' is -1 journalledlongitudinally `of thebed1O=and,-at'A intervalgbhasWorrns=96 coupled therein, as at v197. The worms i96 are i-nrneshevtfith the peripheral teeth lof' the worm wheelsf89 andeachA-ca'singA 944` is extended: or provided wit-1ra section -98 :adapted to Ahouse and protect the worrns196- f "A'bralt- 994s; fastened 4to' one end off the bed, -and--niounts an electric motor 100,- Aof the dynarn-icbraking type, preferably-ofthe General Electric type `-R. Ff shunt-wound', AW'=hose=-n1xain shaft drivesagliinion 1101 -disposed in-rneslrwith a gear ywheel 102i lreyedft-o the'power shaft95.

@To vghard-against the j acks -84 raising. lor lowering" beyonfd a predetermined rsafev` limit, means'are'proirided to cutout the Voperati-ng motor 100 at-either of `saidl-innits. LIn this con-nectionfa cable-0r Adraw element 1103 is fastenedA -at 104 to" one-of the platforms. or t heads 85 anclisztrained1i1nder-a direction pulley 1 165- Asuitably j our-nailed at 106 on` the bed.10. 'Theilo-wer en-d of-ca-ble 10S-isaiasi;- enefd to acounter-weight 107 which is pivote'd at-1G8'to saiid bed/10.' COunter-weightllO? always-maintains the cablef103 taut.

@Adjustably secured to cab-le 103 -aretrip lugs 199 Aand v'110,-'ajdapted-toengage liinit switches 1111 and 112,l respectively, Vsaid switches being of the well knowntype. "lThe switches are proV-ded'wit-h pivot-ally mountedtrips a and lcontactingar-ins v lb, normally held in -closed position .by-compression springs c. Source of;electricalenergy 1l3fis connected :across the movable'inexnber 114 of` a doble+t-hrow switchll; y

'As -"shown, switc-h111-2li-mits the downward metion ofvtheijacks484, a-nd switch 111,;t-he

upwa'rdmovement thereof. @ne side of the switch "111 17Vis--connecte'd "by` wire 116 to ene side i118 of the deb-le-throw switchlll, through the motor Vand bach` to the opposite Contact .of said switch. Similarly, switch' 112 connects with the Opposite side 1191'0fdonhleithrowswitch Y115 by Ia wire 117,

through thernotor-a-nd back to the other side,

o'f thes-Wit'ch i112. Owing tothe fact-that switches lll-and y112-arefnorlnallyl closed, it will be seen that operation-0f the .switch 4115 willoperate motor 100 to `raise orlower the jacksl84.

Assnrning-thatf-the closing of side 118 of im the switch l115 will-cause the inotor lOOfto raise the'j-acks 84, it will' be Seen that when the desired height -is reached, triplug `109will break `*the Acircuit 4through switch 111, caus- V, motor 100; to stop, thereby 4stopping Ythe Jacks, I'Upon "engaging side v:119V of 4switch directi-on, 'Llowering' the i jackslentils-stopped byf tripAJ lirgfll'()l engaging swit`c-h'1112.l #The Yswitchi 115 l may' be lopened by' the operatorwat any time, 'thus pnoviding a tlexible control of theinaChine.` p f y f l Fastenedf to one piti the si'deanembers '-11 Aadj acentf'its Itop are supp'orting .brackets .1120 4which mount/atempletl 1'211-to-a^i'd impositioning or centering 'the structure relatively Ito 'theldrill'`66.` y' Y e Presti-ming' operatiomjthe workfsuch asian t. lLbea1n24, is flewered ley-1a craneor lotherwise-onto' theiheadsi ofthe-jacks 84. Such H-bearrr24 Laslaccenanro'datedl'by the present machine is exceedingly heavfyanfd of a weight heretofore 1 `considered `f impractical ifor hansozas-to drive'thepower shaft throughf the medinmof theegears-101-and102 f'Such-powy en shaft-95,4 through the medium eworms 96 and wor-1n'- wheels I`89, causes the lifting-*screws 96 to elevate, in orderj to elevate theuwyerl 24 to'` the preper'*` height for 'engagement atf its oppositeendsby the chucks 25foffthef-head and tail stocks 26 and 27, respectively. l/V-hen the work 24vis at the proper height,ithe circuit .1 through tlfi-c1ncter '-100' lnaybe broken as tov move thee'stndsl 52' towarfd each other in order tolallofw chuck jawsilfto embraceland hold thebearn or-w-erk24. "Thereupon,4 the `meter 22 may beset inoperation in order-that thrcugh the medium of gear wheels'y 20 `and their co-action `with racks F19,l the b-ed 1O- `and parts menait-edthereon` ina/y he moved `lea-gi# tudinallylto theproper position for-engagework 24 may be turned =abontahorizontal axis which isV theaxis of spindles-44, inl order to presentV 4Vari-'eus 'faces or @surfaces ,of the work 24for-engagement by -the drills A1or punches 66. L l l l A The specific work shown. iseadaptedrto y0ccupy'four dilferent positions in a circle-about the horizon-tal axis mentionedtand t he locked in -each- `one of them: by the vengagement :of bolt;68. in the cooperating; recess 67. VInorder to,r.0tate the Work 24 about the 'horizontal axis, 4 the :jacks- 84: are lowered @and `,then the lever ;74 `isactuated .to retract thefboltfSv,v whereupon .hand Wheel 82y is foperated to `drive worin 8,1, worm ywheelBO, ,and spindlev 44,

Ichiicks," andthe Work. KW'hen thebltS'is f" i' `out of register with the recesses'?, the drum Q46 of the vhead stockis free to be turned apart of a revolution or until one ofthe recesses 67 registersy with the bolt 68, when it is automatically projected by the spring 7 3 1nto such recess 67, thereby stopping the rotative move- -ment. :lt will be understood that the raising and lowering andthe limit of travel ofthe jacks 84 is controlled by the mechanism here- .fcision, and under complete control' at all times. The rollers 49 afford a very efficient reinforcing support forfthe chucks and associated parts, especially under the vweight i of the'worln-since they are located adjacent the ends of the work or zone of engagement of the chucks therewith. v Y Y.

,Various changes may be resorted to, provided-they fall .within the spirit and scope of the invention. i

I claim: n f l. In apparatus of the class described for holding andpositioning elongated structural members for perforating operations, a lon itudinally movable bed, power operated jac s carried by said bed to engage the work, `and means on said bed engageable with the work and operable to turn thejsame about an aXis passing longitudinally thereof, saidjacks being operable to positiontheworkin substan-v tial alignment with said means. g

i 2. In apparatus of the class described for holdingV and positioning elongated structural members rfor pei'forating operations, a bed, power means to' longitudinally move said bed, jacks on said bed to engage thework, means onsaid bed operable to simultaneously actu-,l

ate said acks, and means on the'be'dvoperable to `turn the work about an axis passing lon-V gitudinally thereof, the operationyof the jacks serving to substantially align the Work with the last mentioned means.

3. Inapparatus of the class described for holding andv positioning elongated structuralY f members forperforating operations, a bed,

mea-ns operable to longitudinally move the bed, jackson said bedf for engagement by ther work, means Aoperable toV simultaneously Y operate said jacks, a head stock and` Va tail stoclnone of vsaidl stocks being movab'lelongitudinally ofthe bed, said acks also serving to support the work during perforating. operations, each of said stocks having chucks to engage 'the-work, the operation of the jacks' serving to substantially align the 'work' with said chucks, means 'to turn thel chucks' to accordingly turn work, andmeans tosecure/k the 'chucks and workat different'positions to which same vmay loe-turned.V j

4. An apparatusof the' lass the jacks serving to substantially align the v.

work with the chucks, said yjacks falso serving to support the work during perforatf,

ing operations, and means mounting ,the chucks for turning so that the position of the work may be varied.l i 'I i I 5,. An apparatus of theclassdescribed for holdingand positioning elongated structural `members for perforating operations compris? ing rollers having peripheral-flanges, means mounting said rollers, a bedrmountjedon said rollers and held against lateral displacement by said flanges, means operable to bodily.-

move the bed over said rollers, said bed having head stocks slidable along said Abeds/and having hooked flanges' engagingy the same, means on the stocks and engaging thebed operable to move the stocks longitudinallyof the bed, chucks carried by the stocks fand adapted to rotatablyv supp-ort the work, and jack means carried by .the Vbend adapted to receive the work in substantially horizontal position, and power means to operate the jaclzV describedrifory Y holding and positioning elongated structural n s means so as to align the work for engagement bythechucks.A ,A ,f Y 6. A work-cradle mechanism for `holding and positioning elongated vstructural memv 'i'o bers for perfo-rating operations of the lclass described: comprising a bed, power means to longitudinallyr .move the bed, supporting means for the work mounted on the bed,

stocks lmounted on the bed, said stocks having spindles journalled therein,y v drums carried by the spindles, chucks carried by saiddrum the Aends of the work and Vrollers carried by @the stocks in peripheral engagement with the bers for perforating operations comprising a;

bed, power means to move the said bed-longitudinally, Jack Vmechanism :tof support the Work, said jack mechanism having screws,- worm wheels journalled on the bedrfhaving' threaded engagementwith Vsaid screws, a

power shaft havingworms in mesh` with said worm wheels, means to.l operate said powerr shaft, stocksmounted on said bed,

chucks carried by the stocks yand engageable with the work, thework beingoperable byvr the )ack mechanism to positionthe same horiL-g,

.and turnableon a horizontal aXis to engagey f zontally in alignment with the chucks, `means operable to turn .one of said chucks aboutam axis extending longitudinally ofthemachine,

and a lock means engageable withl said chuck to hold it atdifferent adjustments.

dinally, ack mechanism. to support the,work, said jack mechanisml having screws, Vworm wheelsfjournalled on thebed having threaded.,` engagement with said screws, apower: shaft having., worms in mesh with said, worm wheels, means to operate4 saidV powershaft,

stocks mounted on saidbed, chucks. carried by the stocks and engageable withthe work,

the 'workbeing operable bythe jack mechanism to position .the same horizontally 'in alignmentwith the chucks, .meansoperable to turn one of said chucks about anaxis extendinglongitudinally of the machine, said4 chuck having a plurality of recesses arranged,

in a path concentric with its axis, a locking..V bolt to engage saidrecesses, means operable to retractfthe` said bolt, and 4means urging pro-,

havingfilifting'screws, gear wheelsengagingfr jection of said bolt. Y

9. A work-cradlemechanism of'thecclass. described comprising a Vbase, rollersgrjournalled thereon, a` bed having* sidemeinbers engaging said rollers, said side-members at their lower portions having racks, power' driven means engageable with saidracks to impart .longitudinal movement' to the bed,

4work-engaging jacks carried by the bed be tween said side members,said jacks having,- lifting screws, worm lwheels yengaging said screws and mounted on the-base against vertical'moveineiit, a power shaft on said bed having worms in mesh with the first mentioned worin wheels to operate the jacks,AVA

stocks slidable on the heads of said side members Aand having hook flanges `engaging s id heads, the under surface of one of said heads `having rack teeth, mechanism on each stock engageable with said rack teeth through operation to cause longitudinal movement of the stocks, chucks engageable with the work and rotatably mounted on said stocks.

l0. A work-cradle mechanism of the class described comprising a base, rollers journalled thereon and having peripheral flanges, a bed having side members engaging said rollers and prevented from lateral displacement by said flanges, said side members at their lower portions having racks, power driven means eiigageable with said racks to impart longitudinal movement to the bed, work engaging acks carried by the bed between said sidg members, said jacks having lifting screws, gear wheels engaging said screws and mounted on the base against lvertical movement, a power shaft on said bed having gear wheels in mesh with the firstmentioned gear wheels to operate the jacks,

Y erable. toA turn. said;

stocks slidablewonthe heads of said: .sidef l members and'havinghook flanges engaging` of the stocks, chucks rotatably mouiited'on# saidl stocks and engageable with the work,

means associated with one of the chucks hav-y ing. recesses in -a row concentric with itsaxis,

a lockingtbolt engageable with said recesses, means urging projection of said bolt,means operable to retract said'bolt, `and means: opi J retracted.

11. A work''cradle mechanism of the class chuck when said bolt is describedA` comprising. a base, rollers ours!" nalled thereon and having peripherak ianges, a bed having side members engagf ing said f rollersl and prevented 4from lateral displacement by said flanges, said side members at their lower portions having,;r2 icks,f, I

power driven 'means engageablelwith said racks to impart longitudinalinovement to the bed, work len gaging carriedby` the bed betweensaid side,4 members, said jacksl heads having rack teeth, mechanism on eachstock' "engageable with said` racky teeth i through yoperations Lto vcause` longitudinal Y movement-of the stocks, chucks rotatablygl theawork, said chucks each having two pairs [mounted onjsaid lstocks and engageable-fwith of'fpivotally mounted jaws, means holding@v one `of the jawsof each pair against displacement,when-disengaged with the work,;and-

an ,element extending.v from' the last'meni tioned 'jaws and embracingthe co-acting jaw 1 to preventI displacement thereof when dis-,.- engaged with the work; Y

12. Iiifapparatus of the class described forholding. and positioning elongated structural f members for. perforating ope-rations,-i

a bedhavin-g. a rectilinear movement, vera tically movable jack i mechanism carried by the bed to engage: the work, an electric pzowi`4 er motorqfor'movingithe jack mechanism "to substantiallycenter the work, means for limitingzth'e movementjof said jackmechanis'm and means,` onA .the bed VA'to support and permitff turning of the work? abouty an axis passingw longitudinally thereof," i said limiting means Y including a lweighted cable' secured lto the jack?mechfanism,"A an -electricfcircuit leading to thesaid motor,v amswitch mechanism, and

stops adjustable on: thecable co-actin`gjwith the sw'itcliinechanismwhereby the work may` be4 raisediinto substantial.` valignment with j the second mentioned means. v v

13. In apparatus of the'class 'described for holding. and positioning Velongated I struc- 5tural members for .perforating operations, a rectilinearly movable bed, mechanism 'Yon said bed to support work 'and permit turning thereof .on its axis to different positions, means to secure the work in said kdiEerent lopositions, and mechanismen ythe bed operable to jack the work intol substantial alignment with and for engagement by the first mentioned mechanism.v v

14. An apparatus of the class describedfor holding and positioning elongated r structural members for perforating opera-` tions consisting o a basevhaving rollers, a bed having sidemembers disposedonrsaidY rollers,'rack teeth on onev of the side mem- Y 2or'bers, means engageable with the rack teeth andfoperable to bodily movesaid bed, jack ymechanism on they bed to engage'the work,

means on the bed to operate said'jack mechanism,mounting members'on the'bed having chucks engageablel Vwithy the ends of the work, v

one of said members being a slide,.mea1`:lsvr operable to bodilyfmove said v'slide' on said y bed, means ymounting the chucks'for turning" von a` horizontal axis so that' the position of the work may be varied, and means for securing'one'of the'chucks in different positions to which it is turned.

115. A work cradle mechanisml forholding with the work, the work being operable by the jack mechanism to position the same hori- Zontall'y substantially in alignment with the chucks, means operable to turn Vone of-said chucks about an axis extending vlongitudinally of the machine, and means to hold the latter chuck at different angular positions. s 16; An apparatus of the `classl described Y 5 for holding and positioning elongatedstruc-` turalmembers for perforating operations,

comprising rollers, a bed mounted-'on said Y 17 .l Aniapparatus bof the class described@ for holding rand positioning elongated structural imembers 'for perforating operations, a f

rectilinearly movable bed,mechanism on'said bedy to support' work andv permit turning thereof on a substantially horizontal axisto Y different positions, mechanism on said bed' whereby theV work maybe jacked into'position for engagement bythe first mentioned mechanism, and means operable automatically kto cut oi'the operation of the second' mentioned mechanism when the workvis subi stantiallyl aligned with the irstmechanism; 18. An apparatus of the class described for holding and positioning elongated structural membersjfor. perforating operations, a bed having a rectlhnear movement, vertically `movable ack mechanism vcarried bythe bed to engagethe work, an electric power motor'for movingthe .jack mechanism to sub-Y stantially center'the work, means for limiting the movement of said jack mechanism, j means on the bed to support and permit turn- 'i ing of the work about an axis passing longitudinallyxj thereof, said limiting means including a weighted cable secured to the jack mechanism, an electric circuitA leading to the said motor, a switch-mechanism, and stops adjustable onvthe ,cable coacting with kthe switch mechanism whereby the work may be raised into alignment with the second mentioned means. y

19. A work cradle mechanism of the class described for holding and positioning elongated structural members for perforating op- Verations, comprising avbed, power means to longitudinally move the bed, jackcmechanism for the work mountedfon 'the bed, i

gslidable stocks mounted von the bed, a drum Vrotatably mounted on yone of'said stocks,- av

chuck mechanism carried'by the drum.v

ln testimony whereof I aflix my signature. HOWARD H. MCOLINTIC.

rollers, flanges for preventingv lateral movement of the bedion the rollers, means operable A to bodily vmove the bed over said.rollers,said

and jack means carried bythe bed adapted Vto receive' the workin substantially hori- Y zontal position, and power means to operate the Jack Vmeans so as VVto' substantially align 7 65 thelwo'rk for engagement vby the chucks. Y.

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