US1256073A - Side reaming-machine. - Google Patents

Description

. F. A STEVEN-SON.

SIDE HEAMING MACHENE. APPLICATION FILED MAR. 4. 1916.

' 1,256, 07 3, Patented Feb. 12,1918.

6 SHEETS-SHEET I.

F. A STEVENSON.

SiDE REAMIMG MACHINE.

APPLICATiUI'E FILEDP1'IAfi.4.1916- Patented Feb, 12, 1918.1

6 SHEETS-*SHEET 2- F. -A STEVENSON. SiDE REAMING MACHINE. APPLICATION FILED MAR. 4, 1916.

Patented Feb.12, 1918.

E SHETS-SHEET 3- I qjltorzze z F. A I STEVENSON SIDE REAMING MAUI-IINE.

APPLICATION FILED MAIL 4. 191a.

FQA STEVENSON,

SiDE REAMING MACHINE. APPLICATION FILED MAR. 4, I916.

Patented Feb. 12, 1918.

a SHEETS-SHEET 5.

v r Jzzvemtar .F'redariakA. Stevemow F. A STEVENSON. smE HEAMING MAcHniE. APPLICATION man MAR. 4. 1916. 1,256,073. Patented. Feb.12,1918.

6 SHEETS-sHEET 6' 15 E 19. Y

I Ina/entail" Frederick 1.356226%? @KTH.

s] soreness seem oFF o FREDEBIGKA. sTEvEnso-n, F DETROIT, MICHIGAN, ASSIGNOR o AMERICAN CAR AND FOUNDRY coMPAnY, or see. LOUIS, MISSOURI, A. CORPORATION OF NEW JERSEY.

smn REAMING-MAGHINE.

I To all whom it may concevm I Be lt'known that l, FREDERICK A. Sew-nun ing a' citizen of the United States, have invented; cert-um new and useful Improveiiients in Side Rezoning-hihtchines, of which the following is a full, clear, and exact descript-ion, such as will. enable others skilled in the-art to which it npperlains to make and tonse the same. reference being had to the accompanying drawings WlllCl'l. illustrate the preferred fol-in oi the invention,-

thongh it is to "he understood that the invention is not limited to the exact details of construction shown nnd described, ext'eptns required-by the scope of the claims, as ,itis obvious that various modifications thereof will oconr'to persons skilled in the art. v

In said. drawings:

Figure 1 is a. side elevation of such a our building; tilck as present in the Detroit shops of tl'ie Amei'ica'n(5111' & Foundry Conn pany; undshows my portable rezoning inn.-

ehi'ne supported. from the overhead strno- 1 turei.

fore such operation.

2 is n-tru-usvorse' section through Fig. 1, showing the .renu nin-g nmchine open. sting upon work in full lines;v and in dot nn'ddoshlines showing its position just hc Fig. 3 is side elm-'nlziou of "the upper portion of the ennnng now-lune. mounted upon the overhead structure, and viewed from Within the -ti.ncl ,'-.some of the parts being shown in section. 4

Fig; 4 is a. side elevation of the lower p01- "1'.i01'1 of the. rooming nziclihiu, viewed from Without thehnilili'ng truck. and as the operator faces 1t. e

"Fig. 5 is a transversesection through line overhead. structure or] the building truck Figl-6"-show s the lower portion of the reaming machine Viewed in the some direction'n's the'peits of. Fig.- 5.

Fig. is it transverse section through the overli id cor linilding'stmictnrc, showing the elcctig al connections to the upper. part oi .t e reamingmaehine, most of the parts of the'upp'nportion of'jtho reaming machinebeing'insectlonr Fig. 8 is a. plan View, showing the contact fingers supported by oneof the socket oastings engaging the electrical contacting devices in the upper part ofthe ball casting.

Fig. 9 is o section through .the counterweighg-a considerable intermediate portion being broken out.

Fig. l0 is a, side elevation of the upper part of the counterweight.

Fig. 11 is a plnnthei'eof.

Fig. 12 is another .view of the upper part. of the counterweight, thev direction of vision being at right anglesto that of Fig. 10.

Fig. 13 is-n horizontal section, taken on line 13-13 of Fig. 6 and illustrates the pipe post, the stirrup adapted to ride upon the lower portion thereof, the counterweight, an electrical conduit within the pipe post and means for permitting angular displacement of tho renmer motor and the reaming bit carried thereby.

14 is a fragmentary vertical sectional view,- substantielly on line 14.-14= of Fig. 13,

showing the key of. Fig. 13, and its nssoQ cisted parts.

Fig. 15-is'a. section-al-elevetionsl view of the reen'l'er spindles portion being shown inelevation. 1 F ig. 16 is a section taken on line 16-46 of Fig'..15; i p Fig. 17 is an electrioeldiagrom', showing the connections to the reztme'r. motor.

Fig. 18 is in side elevation of a modifiedform of trolley,v and corresponds to the iight hand side of said tiolley as shown in Fig. 19; and

Fig. 19 is a transverse" section throughthe overhead. girder and shows the modified form of trolley in end-elevation, theright forming u oi'k of. devices of this 'kinc as tl ey areused'to ream holes in a.-l 1or1"z0nta1 .(iirection, through the sides of Work.

Heretofore it has been customary. to use hand IBZLBIQfS zI-Bd, as these-hand i ca ners weigh upwardly from '1bs.' it is extremely difiionit to hold, them in s'horif zontal-position to ream holes inthe-side of Work, requiringthe use of at least two operators, and insome instances possibly .21 make-shift support.

An object of the present invention is to.

utilize an overhead girder of an already present car buildin' structure to support the reaming machine rom, relicvingthe operator from the necessity of sustaining the weight, or any part thereof, of the reaming device, permitting him to devote his entire attention to the work in hand.

Another object is to cause the reamin machine to be ortable, that it may trave along the overliead girder referred to to any-position holes may be located in, in the work. It is further contemplated to incorporate in the reaming 1nachine an ability for its reaming bit to reach holes included in a considerable zone, without the necessity of moving the reaming machine as a whole to reach such holes.

A feature of value is the ability of the reaming machine to be so operated that it will itself exert a feeding pressure for carrying the reamer bit through the hole being reamed, and provision is made for carrying the reanier motor, together with the bit operated thereby, to varying altitudes to-reach any of. a series of vertically arran ed'holes, or any independent hole.

' A. esture of merit is the suspension of the reamer motor at such a distance above the floor line that it is continuously kept away from dirt, which, in ordinary hand reamers that are customarily laid upon the floor, is consequently working into the ream'er casings and necessitating frequent repairs.

The reaming machine has been designed so that when the operator ceases to use it,

, the reamer bit, which is found located at the end of a more or less lengthy reamer spindle, is automatically carried up and out of the way, preventing accidental in ury to such reamer spindle and bit, and clearing thespace between the reaming machine and the work of obstruction, when the reaming Ina-- chine is not in'usc.

Novel arrangements have been created 'for carrying electrical current to and through the reaming machine to the reamer I motor, and otheriulyanta eous features disclosed hereinafter are, 0' course, to be re garded as com ng w thin the scope of this invention.

A good understanding of the general arrangement and'use of my ii'nproved. portable the building track.

building track there are customarily a series reaming machine may be had from inspection of Fig. l, in which 1 indicates the rails of'what is known in a car building shop as On each side of the of longitudinally spaced columns 2, one such column being shown in Fig. 1,:1ndsupported upon the columns 2 on each side of the track are ovcrheadgirders 3, mounted upon the top of one of which is a mild. I.

Thearrangement here illustrated is substantially like one in service in the Detroit shops of the American Cfil',& Foundry Company, but it is to be understood that another rail 4. may be mounted upon the girder supported by the row of columns 2 on the opposite side of the building track, and another reaming device, pointing in the opposite dircction and toward the work, may be m0unted upon the last mentioned girder 3. Also where the length of the overhead girders 8 is great enough between columns 2, more than one reaming device may be mounted upon each girder 3.

In Fig. 1, a. transporting device, shown as a trolley 5, comprising side frames 6, trolley wheels 7 mounted 1n the upper portions thereof, guide wheels 8, mounted. in the lower portion of the trolley and adapted to bear against girder 3, and socket castings 9, is shown to be suspended from girder 8 with its Wheels 7 resting upon the rail 4. Seated in and held by the socket castings 9, is a ball casting 10 having :1 depending cylindrical portion 11, a pipe post 1.2 being screwed into cylindrical portion 11 of the ball casting,

and extending downwardly toward thc floor arms 14, adapted to support idler sheaves15. 106

Cables 16, or like devices, are seciired to the upper part oi? the aluminum stirrup 13, and extend up to and over the idler sheaves 15 and into the interioroi the pipe ost 12,

being there secured to a countcrwel'g t to be 110 later described.

Mounted in the lower portion of the stirrup 13, and so as to be rockable therein, is a reamer motor 17 from which pro'ects a reamer spindle carrying a' reamer rested toward. the work. Due to the capa bility of reamer motor 17 to be rocked, the reamer extension and the bit carried thereby may be oscillated so that said reamer bit will reach holes at different altitudes. 12o

Spanning the downwardly projecting legs 18 of the reamer stirrup 13, is a grab handle 19', the rea'mer 1e 5 at their 11 per portions merging with a s eeve 20 of 1; 1e stirrup.

When it is desired to operate upon Work such as the diagrammatically represented underframe 21, mounted upon work-receiving trucks 22, and the reaming machlne is not in pixtapositionto the longitudinal location of ahole to be reamed, the operator it di- 115 taking hold of grab handle 19 walks toward the location 01: such hole, and the trolley 5, easily responding to the pull exerted by his hand, moves in the same direction, causing 5 the reaming machine to travel with the operator to the desired. location. Said trolley 5 contains current-collecting devices (not shown in Fig. 1), which czmitiriuously engage - contactstrips 23 and 24 mounted upon on insulating strip 25, which is secured to girder 3 throughout a greater length of the girder than the longest possible required travel of the trolley 5. Electric wires, being secured to'said contact strips 23 and 24, 16 extend through .a pipe conduit 26 to a main switch 27,'1nounted upon one of the columns 2, and electrical conductors extend from said switch 2?, there being iuses interposed .between the switch and the last mentioned Zuconduotors, to the bottom of said column and fromthence to a source of electrical energy.

As the operator brings the reaming machine to rest in juxtaposition to the place Where the reaming operation or operations are to be performed, he slides the stirrup .13, whose sleeve-20 surrounds pipe post 12, up o'r down upon pipe post 12 to bring the reamer motor to approximately the proper height,- and oscillating the suspended parts of the reaming machine to bring the pipe post 12- into the inclined position, shown in dot-and dash lines in Fig. 2, directs the learner bit 28 to the hole to be reamed.

Due 'to the angularity f iven to pipe post 12, as shownin Fig. 2 in dot and dash lines, pressure is created by gravity which is adapted to feed the reanier bit 28 through. the work, relieving;- the operator of coi'isidl0 erable physical ell'o'rt to attain this, and

giving him freedom to devote his'atte-ntion to the refinements of the reaming operation. "After the. hole being treated is reamed,

I the operator withdraws the rean-ier bit from the hole'by another'oscillation of pipe post 1-2, thereamer'spindle moves to its out 0t use position automatically and the operator moving the trolley to ditl ereiit locations I frorntime to tln e, as t is necessary to move '50" fr'oinfone reaming zone-to another, continues the reaming operations; Referring toFigs; 3, 5, 9, 10,-].1and l2,

"the upper part of the reaming mariiine will now bed'es'cribed more in detail. The upper -corners of thetrolley side frame. 6 have formed, preferably integral thaurewith, hear- Y *ings'29, those attheopposite ends oi the tr'r-illey'frame 5 'eiich 'suppor'ting an axle 30. open each otywhich; is mounted one pair of;

GO rthe-tro] 1e"- wheels 7- said axles 30 also actin' ll 7 astie' boltsfi'o'r uniting the upper corners of thetrolley side frames 6. Said. side frames 6 arealsosecured together by tie bolts 31" p their upper portions and by the holts e fis jecling portions of bearings 29 maybe of varying lengths to position trolley wheels 7 in nlinemcnt with rails 4, when the latter are not centrally disposed upon girder 3, but said hearings may be uniformly dimensioned when said rails l are disposed upon the transverse center line of the girder 3, and trolley wheels 7-may be of the roller bearing type to cause the trolley 5 to move practically without friction. Trolley side 'lrames (3 may be shaped to in general conform to thc top and sides of girder 3, with out carrying this formation to any unnecessary degree, as indicated in Fig. 5, and said frames 6 extend over and below the exposed side faces of girder 3, their bottom tie bolts :52- passing underneath said girder.

llxccssive weight in the trolley side Frames 6 may be avoided by introducing apertures, as shown in Fig. 3, and if desired, the side frames may be reinforced by ribs 33. Trolley guide wheels 8 in the lowei-"portion of the trolley side frame -6 are positi'oned between supporting cars 34-, extendin; outwardly from the outer surfaces of the trolleyside frames 6, pins 35 extending through the supporting ears 3-1 and guide wheels 8 and acting as axles the.refor,-said guide wheels 8 passing through apertures in the web ot said frame 6 and being 111 almoment with the lower flanges andbo'tt'om coycr-p'late of the girder 3.,with which they are adapted to contact as the trolley 5 is moved along rail 4.. i

In each trolley side frame (3, the lowermost weight-reducing apertures ere positinned sufficiently above the bottom of said trolley side frames to leave asubstnntial vertical wall portion 36, and it is'trom this portion that the supporting; ears M, for the guide wheels 8 extend and in which are the apertures for the passage of said guide wheels 8 therethrongh toward the bottom flanges-and bottom coyer plate of girder 3. The vertical wall p ortions 36 of the trolley side frames 6 each also form's anaitt'achmerit-surface for an upstanding extension 237 of one of a. pair of socket castings 9, said extension 37boing bolted to saidverti.- cal wall portion 36 of'thc trolley side frame.

To be observed bestin Figs. ,3, 5,7 ends,

each socket castin'g' 9 furtheiycomprises jasegrmental spheric portion 38, shaped to retain a Babbitt or other -anti-friction metal lining 39, a horizontal web 40, an attach-- inent flange l1 adapted to lie against the bot.-

tom flange 42 of one of the trolley sideframes 8 and outstanding wings '48-. In its assemble-d condition the reaming machine his a spheroidal head Min the ball casting i 28, remain stationary.

10, which head is held between the socket castings 9 and in contaotvwith the Babbitt linings 39, bolts passing through Wings 43 onthe opposite sides of said socket castings 9 and being tightened suiiicien-tly to permit said spheroidal head 4 1 of the ball casting 10 to turn within the socket castings and form therewith a universal joint.

The cylindrical portion 11 of the ball casting 10 is preferably internally screw thread ed to receive the upper enc of pipe post 12 and is diametrically slotted to permit the passage of the perimetrical portions of the idler sheaves 15, which sheaves are mounted upon pins lfisupported in the lugs,

arms or ears 14 extending from ball cash ing 10, to pass within said pipe post 12.

The cibles 16, which are secured at their lower ends to the stirrup 13, as best shown in Fig. 4, may in reality he a single cable, one end being, secured to said stirrup 13, as shown in Fig. l, and extending upwardly to and over one idler sheave 15, and into the interior of pipe post 12, thence running downwardly through the semi-cylindrical or other shaped groove or slot or a hole 17, to and under a sheave 18, located in a pocket 49, in a counterweight 50, said sheave being mounted upon a short pin or shaft 51, the latter being supported in a hole drilled in the said counterweight to lie on either side of said pocket 49. After passing under sheave 48, cable 18 runs upwardly through another semi-cylindrical or other formed groove or slot-or a hole 47 in the upper part of counterweight 50, to and through the apertures in the pipe portion 11 of hell casting- 10 for the diametrib-ally opposed idler sheave 15, over the lat-- ter and downwardly to the upper end of stirrup 13, to which it is secured, as shown in'Fig. 4.

l Vhenevcr stirrup 13 is moved upwardly or downwardly-there is a responsive travel in an opposite direction of the counter weight 50 within pipe post 12, and when stirrup 13 is broughtto rest the mass of the counterweight is such that stirrup -13 and-the parts it carries, such es the reamer motor 17, reamer spindle 52 and reamer-bit The reamer motor, the reamer spindle and hit ,usually are composed of metals having relatively high specific ravity, and to make the-'eountcrwei'ght 50 or like material would require a counterweight of excessive length, necessitatin receive it, t 0 result being that the stirrup 13 mounted to slide upon the lower end of the pipe-post would either be positioned too low for some types otworlr, or the stirrup would be properl positioned and the pipe post Woul exten in an obstructive Way too close tothe floor line. And, therefore, the reamer stirrup 13 is preferably composed of post and cylindrical an overlong pipe post 12 to aluminum or other light specific gravity metal and the counterweight is composed of a metal having a. higher specific than the metal for the reamer spine lo and reamer bit, such as lead, this compensation in the charaeter of the metals allowing the reanier motor to be placed at a proper and rarity reainer motor. The pipe conduit 53 being secured to said pipe post, remains station ary, and the counterweight-5O embraces it and slides over the exterior of the major portion thereof. Further reference will he made to the pipe conduit hereinafter in conneetion with the electrical wiring of the reaming machine.

The counterweight 50 is conveniently insorted through the bottom of pipe post 12 which is internally screw threaded to receive a closing plug 5 1 at its bottom, said closing plug being apertured for the passage from the'lower end of the pipe conduit 53 of a cablehontaining the Wires, running to the roanier motor 17, said pipe conduit ter1ni hating shortly before reaching the closing phi;

Referring to Figs. 1, 2, 1, 5 and 13, the detailed construction of the lower portion of the reaming machine may be clearly under stood. The stirrup 13 in both its depending leg' portions 18 and the upper ortion 55 which" merges with the stirrup s eeve 20 is shown to he of I-shaped cross section, though it may have other form. The outer flan of the depending legs 18 run upwardly ecoming horizontal at the top of the stirru sleeve and in this position are mer ed wit stirrup sleeve 20, the Web portion '0 the upper part of the stirrup 13- being perforated as at 56 directly under the horizontal flange portions and at each side of stirrup sleeve 20 to form pockets to, receive means for atertures. a

' It is desirable that stirrup 13 be adapted taching the'en'ds of the cable 16, which ends to swivel an appropriate amount about pipe post 12, so that the roaster bit, which is carried by the reamer spindle secured to the reamer motor, may swing horizontally in front oi the work within limits from one hole to he reamed to another. To make this possible a slot 57 is present inthe lower reactors part of'pipe post 12, and is of a length equal to or slightly exceeding the greatest vertical travel itrnay be desired to give to stirrup 18..

In stirrup sleeve 20, in its upper portion is another slot 58 of suiiioi'ent height to receive a key 59. The inner edge of said key 59 tits within long slot 57 in the lower part of pipe .post 12, to have a sliding fit therein, and thatpo'rt'ion of key 59 which extends outside of pipe post 12 is wider than the part having the sliding fit therein and may have angry larly dis'posed sides, the part extending; outside of pipepost 12 occupying slot 58 which, as maybe seen best in Fi 13, is considerably wider than thepart 0 key 59 extending into'it; Because of the difference in the width of that partlof key 59 which extends outside of pipe-post 12 and into; slot 58 of stirrup sleeve 20,;an'd the width of said slot 58, the stirrup-20 may revolve about pipe post 12 an amount equal to, the lost play betweenlreyg59 and the-edges of slot 58. In so turning, the stirrup 13'also gives an equine lent horizontal "turning of reamcr motor 17, and as the reainerspindle 52 is of considerable length the reamerbit 28-carried at the end thereof will'travel; across the face of the work in a horizontal curved path for a very "appreciable distance, andsaid reainer bit maybe vertically adjusted, as previously de I "sc ibed, by the oscillation of reamer motor 17,- 3-

rKey--59 is .retained in place by a cover plate-,dqsecured to stirrup sleeve 20, as by screws, and-platefl-(itl covers slot 58 in said stirrup .slee've. At'their lower ends, each depen'dingjarm 18-z'ofsti'rrup- 18 is provided with a bearing 61 a'daptedlto receive fulcrum pins 62 which have. rediiced inwardly pro jc'cting'ends 63 adapted to pass through elongated slots Gain a 'fulcrum'braeket 65. Fulcrum braclcetbfi preferably comprises a pair of Sll llllilll partspcach part having a clamp portion 66,;attachment arms 67 and an. intermediate "portion 68 connecting the clamp and-bracket :a'rni' portions, and con tai'nin'g-one-"ofjslots.64'tor a fulcrum'pin 62.

' .Eaeh .lialfj of-jthe fillcrum bracket .foirnis a yoke, the-clamp. portions of both half poritions' of the .fulc'rum bracket surrounding a portion. of {thereainer ureter; which motor portion-is usually ajcylin dri'calneck, and are secured-together by bolts o'rother fastening means-clamping the fulcrum bracket about Ponds ohilcrumpins 62 carried in bearings the cylindrical portion of. {the motor. The attachmentarins 67 of each half of the fulcrurn bracket =are"sec1 1red by other bolts to 'othenparts of the. reamenmotor, such as flanges" 114,:givi'nggreat-rigidity to the fulcrumbracket when'asseinbled. The reduced 6L atf' -the bottom ofstirrup 13, project thrmng'h-the slots in the fulcrum bracket, are

..-.-threaded and are firmly secured to said bracketbysuitablc nuts, holding the reamer of stirrup 13.

-motor and the parts carried by it in pivotal connection between the depending arms 18 The fulcrum bracket as a whole is at- -tached to the rcumcr motor 17 at such a to swing downwardly end-carry up the rcamer spindle and bit to an approximately ertical position, unless the operator restrains this tendency by keeping hold of the rcamer motor handle 69. Thus, whenever the reaming machine is not in use, the reamer spindle and bit will be up in an unobstructing position. And a counterbalance 72 is also secured to the handle 69 of the reamer motor 17, to assist and insure the positive swinging of the reamer motor about the fill cruni .pins 62. See Figs. 4 and 6.

- Asbest seen in Fig. 6 the cable'which passes through and out of the lower end of the pipe conduit 58, runs to an electric switch 70 secured to and principally contained in the reamer motor handle 69, which switch is controlled by a trigger 71'located nearer the outer end of said handle 69.

Although in the course of operation, the

trolley 5 is moved along the girder 3 from place to place, and though spheroidal head 44 is caused to partiall revolve within socket castings 9 carried y trolley 5, elec' trical connections have been provided, which maintain uninterrupted electrical connection between the source of electrical energyand the reamer motor 17. Reference to Figs. 8, 5, 7 and 8 particularly, makes clear the character of these electrical connections.

It has already. been pointed out that contact strips 28. and 2% are mounted upon an insulatlngstrip 25 coextensive with them, which insulating strip is secured to the inner face of girder 3,2. 6.. that face directed toward the center of the building track. Mounted upon an 'insulatin block 73, secured, as by bolts, to the web portion 74: of one trolley side frame 6, saidweb portion-74: being between the two. lowermost weightreducing apertures in said trolley frame, is a pair of spring. contacts 75 and 76,-well ,shown in Fig. 7, spring contact 75 beingthrough an aperture in the upstanding extension 37 of socket casting 9 on that side of the trolley, said flexible conduit being held in place in any suitable manner as by staples 82 passing through said trolley side frame. Emerging from flexible conduit 81, conductor 79 goes to a binding post 83 which together with a bolt secures a contact finger 8% to an insulating bloclc 85, secured by other bolts to the horizontal Web portion 3:0 of the socket casting 9, through the extension of which the flexible conduit '81 passes. The other conductor 80 inclosed by the flexible conduit 81 also emerges from the lower end of said flexible conduit and is securedto a binding post 86, which togther with a bolt secures another contact ger 87 to said insulating block 85. Contact finger 87 extends to and over the center of the spheroidal head 4% and is provided yvith a teat 88 at its terminal, which teat bears on the concave upper surface or a central contact plate 89. Said concave contact plate 89 is held upon an upwardly projecting insulating pedestal 90 by means of a binding post 91, having an upper en larged portion screwed into the center of said concave contact plate 89, the lowerer:- treinity of the smaller dialnetered part of said binding post passing through an insulating base 92,"and being provided with bolts 9 1-, but longs;

nuts, by means 01'' which central oontact plate 89 is-held in place, and an electrical connection is made"to' said lower end of binding post 91.

Insulatlng pedestal 90 is seated in a dc;

pression in the upper central portion of in sulating base 92, beingthereby so well posi tione'd as to be the equivalent of an integral portion or insulating base 92. Preferably concentric with concave contact plate 89, but

ina lower plane and upon the upper surface of insulating base 92, is a contact ring '93 secured in place by bolts 9i with countcrsunk heads and a binding post 95, similar to and having an additional nut for the attachment of an electrical conductor. Insulating base 92 is in turn secured by screws 97 to an annular fian' c 96in the upper part of spheroidal head or oit ball casting 10, said flange 96' forming the bottom of a recess in the to of said head 1-4 in which recess insulatinguse 92 is set. Contact finger 8i parallels c011- tuct finger 87 throughout the major portion 0; its length, but as seen in Fig. 7 does not extend as high as contact finger 87 and is bent downwardly to make contact with contact ring 93. A I

Secured to binding post 91 is a conductor 98, and attached to bindingpost 95 is another couductor 99, both of which are inclosed in' a cable 160 which passes through an aperture in a horizontal bar 115 connecting the Walls of the spheroidal head 44-, and runs to the upper end or pipe conduit 53, the conductors 98 and 99 within said. cable passing through said pipe conduit 53, down through the pipe post, as shown in Fig. 6,

and'emerging from the bottom of said pipe conduit 53, and Within the cable 100, run

to switch on the switch handle extending from the reamer motor 17.

Irrespective of any oscillation that pipe post 12 may be given, contact fingers 87 and 84- remain in permanent engagement with central contact plate 89 and contact ring 93, respectively.

Referring to Fig. 17, a clearer conception is to be had of the path of the electrical current traveling 'froin the source of electrical energy to the ieamer motor. When the main switch 27 is closed, and the operator manipulates trigger 71 to close switch 70, current flows from the positive side of-the direct current generator 101, by conductor 102,'through fuse 103, through one sideof switch 27, and by conductor 104 to the contact strip 23, which is carried from the girder 3, and thence to spring contact 75, by conductor 79 to contact finger to contact ring 93 and by conductor 99 to one terminal of switch 70, through said switch 70, and byconductor 105 to' reamer' motor 17, returning from said reamer root-or byconductor 98 to contact plate 89, tocontaet finger 87, and by conductor 80 to spring contact 7 6, thence by contact strip 2%, also carried from the girder 3, by conductor 106 through the other side of main switch 27, through fuse 107 and back to the generator 101.. Reamer motor- 17 thereupon operates, and. the hole in-the-11 6 Work may be properly reamed, said reanier motor- .beccming dead upon the reverse, ac- Q tuation of trigger 71, which opens switch 70 carried on the reamerniotor handle.

A modified form of trolley is illustrated in Figs. 18 and 19 and constitutes the pre ferred form of trolley, anil'g'has the advantage of a narrower Wheelbase, the'reduction of the number of tiebolts and guide wheels in the lower portion of the trolley,

socket castings 9 together, eliminating ch:

the bolts 25, which adjustebly hold the] tions of the trolley side frames 6 of the previously described form of trolley 5. Also, another method of mounting the JI1- tact fingers 84c and 87 and the insulating bloc-1r 85,1to which they are attached, is dis closed. I

The modified form of trolley 5 comprises a pair of side frames 109, adapted to extend vertically outside of the outer faces of the outer and inner I-hcams of the gird er mounted upon the columns 2 of the overhead car building structure. frames 109 extend above and below the girder 3, and the upper portion of eachside frai'nc 109 extends over the top of the girder and inwardly,'after which it extends again upwardly and has at its upper corners troll.0. y wheel bearings 29. Bearings 29 at the corresponding ends of the opposed trolley side ,frai'nes 109 support axles 80, upon which are mounted the trolley Wheels 7 which are adapted to run on rail 4, mount ed upon the girder 3. Said trolley frames 109are also provided with weight-reducing,

apertures, but these are differently arranged than those in the trolley side frames 6 of the first described fornrof trolley, there be ing below the lowermost weight-reducing aperture in each trolley frame 109, a web portion 110, in the lower part of which web portion is anothcrapcrture for the passage of a 'singlegnidc wheel 8, mounted between supporting-ears 3 1-, through which passes pin about which guide wheel 8 is adapted torotate Secured, as with rivets, to the inner faceof web portion 1-10 of each trolley sideframe 10$),is the-upstanding extension 37 o'fasocketcasting '9, which casting is substantially.lihc socket casting 9 of trolley 5 and'has an attachment flange 11 adapted to lie 4 against the underside of the bottom flange 42 of the trolley side frame 109, said flanges 41 and 42 preferably being riveted together, though they may be otherwise united. Tie bolt31 connects the upper portions of trolley side frames 109, atubular spacer 31 surroumlingthc tie bolt and holding said. side frames apart.

The spheroidal-head 4A of'the ball casting 10 is mounted between the internal concave "faces .ofsaidsocl'cet costings 9,-there being nterposed between said sphero dal hood and "the concave faces'of the socket castings the hereinbefore described Babbitt-or other antifrictioii-.;-n1ctal lining 39, this arrangement heing'quite:similar to that-shown in tho first described-form.

i Above the lowermost weight-reducing aperture is another bar-dike web "portion 11]., and on the innings-ids of one of the trolley side frames 109'js aninsulatingbloclr 73,

thouppor-part of which is secured to web portion 1-11 of said trolley side frame 109 and the lower part to-the upper portion of As before, the side.

the web division 110. 'Upon insulating block 73 are mounted. spring contacts 75 and 76,

like those in F 1g. 7, which bear against con tact strips 23 and 2 mounted upon the insulating strip 25 which is carried by the inner face of the girder 3. Spring contact 75 provided with a binding post 77, in the forn of a bolt, which also serves to hold said spring contact 75 to block 73, and spring contact '76 is provided with a similer bind mg post 78, and, as in Fig. 7, electrical conpoint near bottom flange 42 of said trolley side frame 109, and passes through an aperture in the vertical flange 112 of said. trolley side frame. After-passing through the just mentioned aperture, flexible conduit 81 is directcd toward the transverse'center of the trolley 5, wires 79 and 80 emerging there from and running, respectively, to binding posts 83 and 86, which with their bolts se-' cure contact fingers 84: and 87 to -insulating bloclc 85, 'which in the. modified form, is

mounted upon a bracket '86, shown to comprise :1 sheet metal bracket, though any suitable'typc of support may be substituted for this bracket.

Contact fingers 84 and 87 'in the latter form of trolley are disposed longitndinell of the trolley 5" and also girder 3, finger 8% being like that shown in .igs. 7' and 8, and contacting with concave contact p'lttte 89, mounted upon insulating pedesta-l'90, and contact linger 1 makingclectriciil-ongegdi ment with contact ring 93, mounted'upon.

the upper face of the insulating base 92. The construction of the insulating base, its attachment to the spheroidal head of the ball casting 10, the formation of said cas ting and the parts depending therefrom being the same as the corresponding parts shown in the first type of the portable recur ing machine.

The same reams-i spindle 52 maybeused in either form of reaming machine, and, as shown in Figs. 15 and 16,n15.iy be e-multiplcpart spindle- Spindle parts 116 and 117 are" preferably tubular, the motor spindle socket and. 118 of spindle part 116 being adapted to liescrewed upon or otherwise sc die part or extension 117,.which is adapted to he telescoped within suid-extension socket.-

The extension socket 119 of spindle pert 116 is slotted to receive lugs 121 on the end 120 of spindle port 117, a. not 122. being threaded onto the exterior of socket end 119 -tion. -wh1ch, when I .united, are normally out of register with ofspindle part 116, retaining 's 116 and L17 in interlocked and riving rela Nut 122 is provided With slots 123, spindle parts 116 and 117 are lugs 121 on spindle part 117, but which may be alined with said lugs by a. partial rota sleeve 125 may be inserted 'ternall tapered sleeve 126, preferably tion ofnut 122, whereupon spindle part 117 may be quickly and easily removed.

Spindle part 117 has at its other end another socket 12d, adapted to receive uni ininving a Iorse or other standard taper. The Walls of socket 124; are slotted 'at their ends to receive lugs 126 on taperslecve 125, and a. nut 127 holds lugs 126 in the slots pro vided for-them, retaining tapered sleeve 125 within :socket 124. Reamer bit 28 (not shown in Figs. 15 and 16) is adapted to be held in a chuck (also not shown) which is of common form and-has a tapered shank adapted to be inserted'into tapered sleeve 125, which has a. slot 128 to receive the tang usually present atthe end of such chucks to insure a positive drive.

When a shorter spindle is required, spindle part 117 may be removed and tapered into socket 119 in spindle part 116, nut 122 then serving the same function asnut 127. Also" other indie parts act as. i

spccial tools for unusual operations may be en'iployed in my machine, and it is to be clearly understood that I do not intend to limit the character thereof, but, to use it as a machine of any type that it is suitable to 70 What I claim is 1.. In combination in a machine of the class described, a transporting device having a non-rotatable body portion, a motorsupp'ort connected with said body portion, said support being adjustable as to its oivnv length and adapted to be moved in1more directions than said transporting device, a

spindle parts maybe added to lengthen the v reamer spindle.

Lee

The portable reaming machine hereinbefore described is not complicated and being of rugged construction is unlikely to get out.

of order. The keeping of the reamer mot-or away from the floor does away with the practice of sending it to the repair shop,

except at long intervals, it having been" shown by actual practice that the hand reamers formerly used frequently had to be sent to saidrepair shop daily, necessitating alarge reserve supply of such tools, which supply mey,- iwith the use of the herein dis.

closed renrnr machine, beredu'ced. to a negligible quit tity. The'reduction ofnecessary jwor men} to. quired-ch ea-pensfthe cost of production and increases the capacity of the shop inwhich the present reaming machine I or niachin es are. installed. Moreover, the electrical airrangements jareplaced out of dangerous positions andbeing largely inclosed, removes the dangerof the operator receiving an electrio shock. I While I have described my invention as constituting a, reaming. nmchine, it is quite obvious that itinay with equal facility be egnployed as a machine for performing other operations, such as are done by drills,

etc.,.'.it 'b'eing only necessary to replace the reamingflbijt'by the proper type of tool, which is usually of a well-known character and obtainable inv the open market. Also hulf thafformerly re' "be operated by said motor, and means p1? o- 5 V v1ded with a motor-control and being adapted to cause said motor to, direct a. tool held motor adapted to be moved independently of said support and a tool holding member adapted to be driven by said motor.

2. In combination in a'ine'chine of the class described, an overhead support, a inotorsupport adapted to swing comprising.- zr pendent member hung from said overhead support and restrained from longitudinal travel. and a inotorsustaining frame slid-. able along said pendent member and provided with spaced motor-mounting portions between which :"ltl pendent member is adapted to extend, a motor and a tool holdf ing member adapted to be driven thereby, said motor being adapted to be .m'oved to di- J rect said tool holding ntieuiber to predeterinincd positions. I

3. In combination in a machine of thei class descriled,means for supportingnmotor, 1: H r. motor, ctool holding member adapted to ice by said tool holding member to predetermined positions. i

4. In combinution in a machine of the class described, transporting means, a motor- 1'06 supporting means connected therewith and adapted to triuisier a motor to various altitudes and to positions in apluralityofdifferent directions independently. of said transporting means withoutiverticel travel of said supportingmeans near said train porting means, a motor, and steel hold up member operably connected therewith. 5. In combination.in/n1machine of th class described, an overhead support a adjustable motor-supportin means sung therefrom, a motor .rockab y mounted said supporting means, the, support means having relatively adjustablepiirts b tween the points of suspension and moto support, a tool holding ineinberfoperabl connected therewith, n eans for swiveling said motor in directions other than those which it is roclrable and nieansfo'r causing said "adjustable motor-supporting meansto hold said motorat'difierent altitudes. 6. In combination in e machine of; 1; class described, an overhead, support,

motor-supporting means connected therewith, a motor mounted by said means, a tool holder adapted to be driven by said motor, a

'ity .of directions.

motor handle, a ower-controlling. device carried thereby an powerconvey1ng means leadin" from said motor-supporting means to sai device and therefrom to said'motor, said handle, motor and tool being combined to be movable to directs. tool in a multiplic- 7. In combination -in a machine of the class described, .motor-su porting means forming an arm displacea is through dif- -ferent planes and resistive to' fiexure, a

motormountr'd therein, power-conveying means extending through said arm and to said 'rnotor,-a tool holder adapted to be driven by said motor, a device movable with said-motor and tool holder adapted to be moved to'direct' a-tool held'by the tool holder within a zone,'an d means'for transferringsaid motor to different zones.

8,. In combinatlon ln a machine of the class described,- motor-supporting means resistive to fleXure comprising a. portion held against longitudinal travel and a motor-car.-

.rying..-portion, means projecting from one into the b fi'ier. of said portions permitting the motorkcar'rying portion'to slide longitudinallybf suid'oth'er portion and to turn withbut longitudinal sliding independently of the d'atter, a tool holder and a motor mounted to direct stool to predetermined positions in work.

7 9. In combination in a machine of the class described. a transporting device adapted to be moved along-an overhead support, a work-reaching means connected therewith,

a motor-support adjustably mounted on said workreaching means to move with the same and-also independently thereof to variously position afmotor, a motor carried by said support, a toolhplder adapted to .be driven by said motor and a device for controlling the operation of the'inotor movable to responsfvelymovesaid motor and tool holder todi t a tool held by sa'idtool holder to predetermined positions in work.

class. described, an overhead runway; a transporting device adapted to be'm'ovable aloud: the same, a" work-reaching device'suspen ed ;fi;om said transporting device, a

v motor-support mounted thereon, an electric holder operable :th'ereiro'm, an elcctri cal our rcnt-supply line 'near'the runway and, an

- nected motor held bysa'id motor-support, a tool interrti'ptable electrical circuit movably conacross-said supp'ly line and running ,60 tc said motor.

. thereon, .a

11. In combinationina machine of the clam descr bed, fa snitch] y {supported workreaching post, a. motorssupport slidable gj..e1e'ctmc motor carv 10. In combination 1n a machine'ofthe ried by said support, a counterweight operc5 ably connected with the latter and slidable through said post, and electrical conductors to said motor passing through said counterweight.

12. In combination in a machine ot-the 'cl ass described, a. suitably supported tubular work-reaching post, a motor-support slidable thereon, a tool-driving motor carried by said support, electric conductors to said m0- tor, a-conduit for the conductors within said post and a counterweight operably connect ed with said motor support and also slidable within said post and provided with a passage for said conduit.

13. Incombination in a machine of the so class describecha motor-support. means for snstaining thesame, a motor mounted in said'snpport, a too1-holder remote from said motor. means connecting said motor and tool-holder and adapted to extend the latter toward distant work, and pivotal means so connecting said motor and motor-support as to cause the means connecting the toolholder to the motor to automatically move to an unobstructivc position outside of-snidtl) motor-support to carry said tool-hkilder and a tool therein toward said sustaining means when the machine is out. of use.

14. In combination in a machine of the class described, a trolley and oscillatory tool-.

operating means comprising awork-reaching device' o'intedly connected with said trolley, a motor-support; a motor carried therchv, said motor-support being sliditble at will upon said device and havin'ga passage through which said device is adapted to extend into juxtaposition to said motor, and a motor operated tool-carrying member, said operating means being adapted to feed a tool through work during an oscillation 195 thereof. 4

15. In combination in a machine of the class described, atrolley through which an overhead support and a runway for the trol icy are adaptedto be threaded, anti-frictionmeans for engagement between said trolley. I and portions of vertical faces of the overheadstructul'elocated away from the runway and between said trolleyand runway,

and' tookoperatiug means suspended from said trolley comprising-a motor-support, a motor mounted in said motor-support and adapted to be turned to direct a tool to predetermined points in work.

16. In combinationin a machine of the class described, a trolley ridable along an overhead structure, a member rockably suspended from said troll'eyran electric tooldriving motor, means supporting the same from'said suspended member, and electrical 126 operating means for said motor comprising a source of electrical energy,-a current-supply has supported from the overhead struc ture, an electrical movementpermitting con- 17. In combination in a'machine of the class described, a trolley, adapted to traverse an overhead runway and compr sing a sui table frame, a runmng gear mounted therein and a 'sockebforming ortion, and a tooloperating devic'c comprising a member having ahead rockably seated'in said soeket, a motorsup-por't, a motor mounted in said motorrsupport, a tool-holding means adaptedito be driven therefrom and means for operating said motor, said tool-operating device being adapted to be oscillated.

"port and a tool-holding device adapted'to be.

18. In combination in a machine otthe class described, a trolley movable along a runway and compnsmg'assembled frames,

a. running gear carried thereby, means main taining a given relationbetWeen said frames,

and running gear, and members carried by said frames iorming an adjustable socket, a. roclrabl'e member having a head seated in said socket, means for adjusting the latter, a' 'inotor-support carried by said roclrable member, a motor carried by said motor sun driven thereby.

19. In combinationin a machine of the class described, an overhead structure, exposed electrical conductors adapted to be carried by and insulated fromjsaid overhead structure, a runway extending with said overhead structure, trolleyridable along 1 page ed said runway and provided with a side frame, electrical contacts supported by and-insulated from the latter and adapted to m'ovably engage said jcondnctors', means snsfrom said. trolley and adapted to support a motor, 'a'tool-drivingmotor, and

class described, a

an electrical-en" 20. In combm on in a' machine-of the stay thereon, a t y adapted to; be moved alongJsaid' runway. andfe'omoris'ing sfiaced side f ame's, trolley-wheels ridable a-long tlie I runway and mounted in said side. frames,

socketrtorming members'securcd t o downirardlyv extending portions 'of sa d side Iclass described, aftrolley adapted to be =i'rames and forming a socket lielowth'e overheadfstructure,means tor carrying a tool- 'ing motor and provided with a head a g said-socketsforming members to said fhead.

21. In combiuation '.-in a' machine hi the moved along anoyjerhead structurefand 'comprising side frames, socket-forming members rigidly, secured thereto, anti-fric for-operating said motoiz' rerhead structure,'a runtiedjfin said socket and means for adjust- Lion means carriedby said side frames 86 adapted to engage the overhead structure, a tool-operating device andsustai'ning means therefor provided with a head adaotedto be adjustably clamped between sai 'soeket forming members. i 22-. In combination in a machine of the class described, a :trolley comprisinga frame, members opposingly secured thereto and provided with concave 'so'clrehforming 'walls, means adjustably connecting said or posing members and anti-friction linings in, said concave Walls, a'device'prov'id'ed with. a sphere-like head-adjustably clamp'cd'be tween said socket-forming Walls and-in con-. I tact with said linings. f 8'0 23. Ineombination in a machine of" the class described, holding means nrovidedff 'i with, a socket, a membenprovidedWitha" 7 head rotatively and r'ockably seated insaid socket, a motor, means for connecting saidmotor with said member, an electric tool driving mot0r, suitable electrical contacts-I carried by said head andinsulated therefrom and from each other, self-adjustable I I connection-making devices eoutin'u onslyen- A I gagingsaid contacts and mounteduipon and I insulated from said holding mean and from I ;oucl1 other and an electrical circuit-for said i I I motor includingzsaid contacts and connection-malring devices. b5

2 2.111 eombinatioir'in a'machine' of the j class described, a trolley provided'ivith socket, a. member having a ,liead'rotati'vely seated in :said socket, an electrical conncc tion between 'said trolley andi hadcompfr I ingan insulating base seatedin the latter, an insulating. extension therefrom, a con- I tact annulus secured-t0 said base anda c'on-Q tact all'ixed to said extension and co'nIt'act lingers. ermtinuously engaging said anniili ls a ul cont-tel; and supportcl-ainlginjsl'ilated' from said trolley, a' mo ifdafited' to-be Dl(lV (.(l ltll saidll'eadia'r member and circuit for said motor; including said el trica [connection adapted fio 'lo 'e' ener" 2;). IM combination in ={L-Ififl0l class described,"a suitably Us I larpoat, sheaves mnuntedtoe I I the same,- a motonsupport ,slida e- 1' said st, a tool drivingg"inotoi' ,c'a said; motor-support, a emi'n te e able within said post, :isheav"" tl'iereby and a-fieXible eonne'ction 'lje said motor-support and counterweight; u

nine about said-sheaves:

. Bit-In combination in a machine of class described, a suitably some}; la r post, sheaves mounl'm'l infre'lat' felyfixe'd positionsfltolextend adithin the en w -tors|lpport. slidahle i-nion' said-i705 driving motor carried by said motor-sup! port, a eonnterwcightprovided with a pocket and passages andslidable within said post,:

a sheave mounted in said counterweight pocket and flexible means connecting said motor-support and running about said sheaves and through said passa es.

27. In combination in a machine of the class described, a suitably supported tubular post, a motor-support slidable thereon, atool-driving motor mounted in said support, a conduit within and secured to said post, a, slidiible counterweight also within said post formed to embrace said conduit and to move alon the same means res onsivel 7 direct a tool held by said tool-holder.

29. In combination in a'machine of the "class described, a suitably supported post provided with a. keyivay, a movable motorsupport, a motor carried thereby, a toolholder rigidly connected with said motor, said motor-support having a sleeve slidable over said po=candbeing provided with a slot, :1. key fitted into said lccyivay and extending into said slot and being; movable with said sleeve, said key being heldfr'ozn relative rotary movement with said post 'th'erebeing lost motion betw' een said key and slot to permit said motor-support to turn to variously direct said toohholder.

30. In combinaiionin a machine of the class described, a. bifurcated motor-support, inwardly extending pivot devices carried thereby, a motor carried by said support through the medium of :2, frame coacting with said pivot devices, a tool-holder connected with said motor pod adapted to be driven thereby, said frame being secured to said motor and provided with slots, and means for retaining said pivot devices in said slots in any of a number of selective positions out of coincidence with the center of gravityof themotor and the parts carricd thereby to permit said motor to raise said tool-holder.

81. In combination in a machine of the class described, a transporting device, a. depending oscillatory motor-s11 ort having a portion rockably seated in set transportm' device, a tool-driving electric motor evrrie by said support, separate electrical comiuc tors on said device and motor-support extending toward the roclrably seated portion of the latter, and o. self-adjusting electrical connection between said conductors.

32. In combination in a machine of the class described, a transporting device, a de pending oscillatory mo'tor-support carried thereby comprising telescopic members having slots longer in one member than in the othel'ga key inserted through the exterior of the outer member, held in the slot of one member and slidable in the slot v0t the other, and a motor mounted in said motorsupport.

33. In combination in a machine of the class described, a transporting device, an oscillatory motor support comprising a tulmlzir portion closed at its opposite ends, a. motor-holding frame slidable thereon, a counterweight within sa'id tubular portion, flexible means connecting said frame and counterweight, and a motor mounted in saidframe.- I

so' i In Witness whereof I have hereunto set my hand in the presence of two itnesses. FREDERICK A, STEVENSON. W itncsses Euor W. S'roona, J. K. Barres, Jr.

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