US1540537A

US1540537A - Method of making lamp mounts and similar articles

Info

Publication number: US1540537A
Application number: US517737A
Authority: US
Inventors: William R Burrows
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1921-11-25
Filing date: 1921-11-25
Publication date: 1925-06-02
Anticipated expiration: 1942-06-02

Description

.fiume 2, 1925. 1,540,537

w. R. EURRQWE METHOD OF MAKING LAMP MOUNTS AND SIMILAR ARTCLES Filed ov. 25. 3.921 5 sheets-sheet 1 L ,m of

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METHOD OF MAKING LAMF MOUNTS AND SIMILAR ARTICLES Film1 ww 1921 sheets-Sheet e Jitl Patented qlune 2, 1925.

unirsi) s'rfATss PATENT 1,546.53? orties. j

WILLIAM n. BURBOWS, oF NEWARK, NEW JERSEY, Assiettes To GENERAL nitsc'rnic 'OOMPANY, A CORPORATION or NEW YORK.

METHO) OF MAKIG LAMP MOUNTS AND SIMILAR ARTICTJ.

Application led 1\T'ovembe'r 25, 1921. Serial No. 517,737.

To 5N fic/emit @'15 may coiiccrna lle itknown that I, WILLIAM R. BUnnows, a citizen of theUnited States, residing` at Newark, county ot Essex, State of Nenwlersey, have. invented certain new'and useful Improvements in Methods ot' Mak* ine; Lamp` Mounts and Similar Articles,V of

which the following is' a speeicationl i My invention. relates to the manufacture of incandescentlamp mounts and similar 'articles ,comprising twostitf leads vor wires embedded in a glass bead and supporting a short wire or filament to which these. leads also supply current. This type ot' mount is used extensively in flashlight. lamps designed to operate on -low voltage, such as' two to four volts. These mountsv mustbe made with great accuracy toii'isiire that the correct length of filament is included in circuit between the leading-in wires, and heretotore it has been necessary' 'to have these mounts made by comparatively skilled labor v iny order to obtain lamps made accurately enough to be ot. the desired uniformity in candle power and voltage. y,

One object of my invention is to provide an improved method ot performing those operations o't mount making which must be done with `great.A accuracy and which heretotore could he performed successfully only by sliillcd operators. v

Another object of my invention is to providev a method for making such mounts which are more accurately ,made and more uniform than -similar mounts heretofore made by the skilled operators ordinarily available in a lamp factory.y

'A ltui'ther object is toprovide a simple and efficient method of securing the tilan'ieiit rto the leading-in wires with-the proper length of filament Iin circuit. between them and yshaping the filament. with a `degree of accuracy and uniformity' not usually obtainable under ordinary itactory conditions. Still another object isto provide a method by which a filament of the proper length may be applied to the leads of the mount while it is part of a long lament wire wouinl on ii spool, and `(then cnt off from the' spool ot wire, in such' a manner that mounts may be made rapidly and with a high degree ot accuracy and uniformity.

Other objects and adif'antages of 'my inrciition will appear from the description of the particular embodiment of the apparatus which is described in the following specilication and by means of which mymethod may be practiced, the novel features of iny method being' pointed out with greater particularity in the annexed claims. llly ir.- ventioii is capable of' beingl carried out in many different ways, and various elements my invention commercially, and in theseI 'oi" the apparatus illustrated lor practicing my method may be changed andniodiiried drawings Fin-ureA 'l is a View in persiicctiv'e of one, forni of finished mount which may be made by my method; Figs. 2, 8,4, 5, 6, 7, S and S) are diagrammatic views to illustrate the sequence voi: operations by which in accordance with my invention the lilament is put in place, attached to the lead wires,

shaped, and cut ofi' from the spool. ot' filament wire with the end of the wire ready to be secu red to a lead wireo't' the next mount, Fig. l() is a side elevation of. the filament feeding mechanism with a part of the mount carrying* table and one of the pinch-- ing.,T jaws shown to illustrate the relations ol the parts.; Fig. ll is a View in perspectivel .ot part Aot' the filament feeding meohanisiir in its forward p ositioii corresponding to Figs. '2 to 5'; Fig. l2 is a perspective view ot part of the tilanient'teeding mechanism in its retracted position., corresponding1 to Figs. 8 and 9; Fig. 13 is a plan View, with certain parts broken away, ofI a` preferred form ot' machine; Fig'. le: is a side view ot the indexing; or locating).` piu which accurately positions and liruily holds the rotatable table so that cach mount will be in proper relation to the mechanism which opcrates on it; Fig. 15 is a side view of the spacing' and cuttingr mechanism which spaces the'ends ot the leadingein wires vthe proper distance apart and simultaneously' cuts them to the proper length, and also po sitions them at the proper distance from the til) center of the rotating' table; Fig. 16 is a thebladesto the leading-in wires and the l mount holder; hig'. 17 is a plan view ot' the `filament attaching mechanism with the lilas,r

ment wire feeding mechanism omitted. lorf Al'l'eainess of illustration; Fig. 1S is a side bending; by movin(y till in Fig. 4C', and over which the Wire lna'y be bent in one direction, and also' bent back overa second shaping member such as the end, of e second flat blaclei held adjacent. the `irshas indicated in Fig. 7. The wire can be bent back and'forth over the shaping members in various ways, vbutfl prefer to clamp the end ot' the Wireto one lead 3l as, 'for example7 by gripping the leadand the wire overlapping it between the shapingblaflel and a. pinching jaw 36 with Sullicient pressure to clamp the wire iminm'abll,7 to the lead, and then move the Shaper 35 to bring' it alongside' the tiret blade and thereby bend 'the wire and also lay it across the other lead 327 as indicated in lligf. liurth'er prefer to make the Shaper or former of Such a, Size that it substantiall'j'yT lille the space between. the two leads,v and to bring it, lwith the shaped filament on it; into place between' the leads, with theende of the shaped lila nient lying across 'the leads and perpenclieuv `lar to them, and. then by means el? the pinching jaw 3S and acooperating pinching .ja-W

'. 37 iexert entiicient pressure in 'a' direction along' the line joining thenleacls to sink or 'embed jt'he'iwire in the leads, yas indicated in F 8. To this end the Shaping bladeeI let anni iii-are of Such a thickness that' wheny .eirle by 'side with the 'wire on them,l aslshown in Figo. 'l' -anrl 8, they holo. the leads and` Wire iirsneli'poeitien that the closingo the pinching jaas-embes the wire in the leals. .lily making' fthelrst bentl of vr the Wire arounrl the Shaper 34 lwhile the' end of the Wire is :lirrnly held, and then cm'u'ipleting the 4..., the other Shaper 35 into place alongside the'tirst, thefworlx4 of bencl.- the Wire and pulling; into place between the whatever extra length oit wire is l il to malte a. filament of the proper h is all-clone byzthe Shapers, without displacing either the learl:` By my method theproper lengthnfl: iWire for a ilznnent ie accurately nieaenrecloi 'when s'ianeclgantl can be varied by varying t wire the elia/peigne i'o'r exan ngi; the aincuntol overlap oi l m The filament f hlarlee 3l one. definite ari-gl very uniform, as ilallee can be niafle to overlap ul,..each time a 'filament ie lrrulil, anti filament- .ol all inthe eamo relation because the l' (li )laced by inv method oi lent.-

ament wir@ can moet conin proper relation lo the if the Wire belli uml conirollml "by i a wire .lnifle Ilz?. compreingg ori: throuul: which the wire .ch the l'virc "nrw 'when the bellici piroteel arm 'cooperating with ratchet Wheel fill. lr loca far enough away to avoid any displacement of the leads by theguide,the end ot' thev .Wlre will he across or be 1n contact W1th one of the leads, such as lead 31, as indicated in Fig. 4 1. ln order to make sure that thewirc vwill project far enough from the holder or guide 38, l draw the guide G12-holder bac'lc a Short. distance along the Wire after the pinching jaws have closed and pinched the hlament Wire into the leads aud whlle the jaws are cloeedv as indicateflL in Fig. S, en

that the pull exerted-on the wire as the `ouille is drawn baci: is resisted by the pinching jaws. lifter the .euifle has been, lra\rn back the Wire ia out close to the leatl 32, as inclicated in Fig. 9, leaving` a projecting' cnil long enough to permit the guide 38 to be eet la'ryenough away :trom the .leads to avoid any displacement of the leads by it, anfl yet bring/the enti of the wire .into proper Aposition.

' After the-,proper length of wire, has been measured ofl`. shaped if neceeary, and Secured lo the leads, the Shaper is ren'xoverl from betweenlhe leads, and the mount freetlfrom the filament wire by cutting the wire near the lead 32. This Wire can be cnt'witle, shears, but l prefer to sepa-rate it by meaee ot' au electric cutter 39, which by means o'l `an are molte or burns the wire in, two, asf have 'founrl this; a. very cou-k tion with lhe luieration el? this' apparatue.

ln the 'Imrl'icular form o1 .machine which chine by means ofy Wheh my imlnoveil. niethcal may be 'uzaeiceil lo aflvautagfc. the .arioue parte as shown irr Figi. i3. arev umuntlwl ou a lame l-(l rourenientlg.' malle 'iu lhe iorm el.' a heavy table, 'llu` driving: ,mechanism is mounted umlerneath the 'top of the 'trame or table and rompriees two lriviug' sbatte ell :nul l2 set at right angles lo ,eac-li other and nearer! togflther to operaie the ne speed( .For irupaxi'ling an intermittent or alenbl step movement to a movable ,carrier 'for the mounts, the ilrivingr Shaft 4l carries e cam lil moving a whichcarriee a pawl l5 the nartieulaif machine' shown, the erro il sm lar enoauli h revolution of the 'ico lll)

l have illuetrateo, es au example ot a, ma

'ige

lee

' that the .ratchet wheel moves yone-twelfth of a revolution for eachrevolution of the cam.` ,The ratchet wheel 4Gis secured to :the lower end'of a' vertical shaft 47 which extends through the top ,of the base 40 and carries on.its upperprojectingend ahorizontally movable carrier such-asa` rotatable table 48 for carrying'each mount-through Aaf-number..of positions in vsuccession and totwhicli an intermittent or step by step movement v1s imparted lby the .mechanism 1 just, descbcd, all 'of which is underneath the topof thehase 40. By means of a Atravelling vcar1i er,-such as the rotatable ta'- ble 48, each mountA mayy be vbrought into `short time. I

.lustrated each m'ount holder stops in twelve spaced about the proper distance apart dur- 4 ing all of the operations pf mount making.

" operative relation 'tof different mechanisms in succession, which automatically perform different operations onfthe l'mount which is held stationary at each position for a InA the particular machine ildifferent positions during one complete rotation of the table, although a greater or less number of positions can be used.

in place and side by side during the` various operations' byLmeans of a travelling holder mounted on the tablev48. In this machine there are twelve holders-near the rim of the horizontal table 48, each holdcr consisting of a' vertical block/19 having a pair of vertical holes 50, each 'of a' size to receive a lead for thetmount and to hold it- -vcrtical Withthe upperentl projecting :1

proper distance above the 16p of the holder` which thus holds i the leads parallel an'd The leadingin wires i orleads4 of the mounts may be placedside by side in the holder at position A vin Various Ways, either y by Ahand or automatically. 'For simplicity,

. lhave shown a machine in which the holder is loaded at position A by Athe operator,

who then, or while .the holder isat' position B, vplaces a glass ring51 overthe leads so that it. rests on the upper end of the holder. lhis ring is of asize totit easily'over the leads, and-of a height which is only a fraction ot the lengthi'of lead projecting above the holder head." 'At'position C the glass lring comes within range of the burners 52 roper length, and ositioned at fthe proper istance tromtheaA is ot' the rotatable table 48, by an automatic spacing andv cutting mechanism located at positionnD. Thls spacing and cutting mechanism sis-.illustrated more in detailinllfigs. T15 and 16 comprises acent which forms with the spacing blade 54a.

shear for cuttingl the leads. llThe housing and b ades 'are carried by a standard 57,

The blades are provided with pins or rollers 58 which project into two oppositelyinclined slots 551 in a sliding double slotted .cam 60 which is actuated through a pus'h rod 46l connected to a cam follower 62 driven by a cam (S3-on Vthe driving shaft 42.' The ends of these slots 59 are parallelfora short dis-.

tance so that at each end of its stroke the sliding cam (30 has a certain travel which vis idle so `far as moving the blades is concerned. As the sliding cam 60 rises the rollers 58-are pushed apart, and the blades 54- and-56 are thereby drawn together, and' as it descends the rollers are' pulled toward each other and the blades are thereby Separated.

The parts are'so timed that while the holder head is stationary at 'position l) the -s acing blade 54 advances toward the mount older The two lead wlres 31 and 32 are held until its middle point is between the two leads and the bottoms of the two notches 55 are at a 'predetermined distance radially. `from the axis of the table 48, while at the same time the v'other blade 56 also advances toward the mount-holder and first pushes the -two leads 31 and 32 to thebottom of the notches 55 thereby spacing'them a definite distance apart and ,also positioning them a definite distance from 'the axis of rotation advance and shears off that part of the leads 'of the table 48, after which it continues to rect relation to the'various mechanisms which operate upon the. mount, I 'providea'n indexing and locking mechanism of which one form comprises a housing 64 placed ad ppsition -D and carrying a sliding ocking olt 65 provided .with a tapered end.:j'

Twelve V-shaped notches 66 are cut in the?" rim of the rotatable table 48 between tlie.

holders to receive the end of the bolt 65, alsv though only one of the notches is-l own'ilr Fig. 13 wherei'a part of a thinshee nletal cover of the table 48 is broken away to `show the notch. A ny slivfhtinaccuracyl yin the angular movement o the table is-corrected when the wedgeshapedend of the lockmg1 bolt'enters a V-shaped notch 66 and furthermore the table is firmly locked as long as the locking bolt is firmly seated in the notch. The locking bolt is yieldingly driven into the notches 66 by some spring actuated automatic mechanism-such as a` spring' driven push rod 67 connected toa-'cam foil'.`

lower 68 which engages the cam'63 to pull down `the\\rod 67 and retractwthe bolt.` and;

iso

. operations at each position are completed.

the cam follower 62 of the spacing mechanism tothe cam follower GS of the locking mechanism.

The timing of'the mechanism is such that the locking bolt-enters the V-shaped notch and positions and locks the table prior to the beginning of any operations of the mount and holds the table firmly in place until the .v-'ln the particular arrangement shown the cam 63 raisesthe cam follower 62 andthere by stretches the sp-ring G9 which yieldingly seats the lockingbolt in the notch 66 during the first part of the upward movement of the push'rod .61, while the sliding cam G() is moving idly and before the spacing and

cuttingI blades

54 and 56 begin ,to move. rlhe bolt @die held firmly seated while those bladesaref'unetioning, and until-after those blades have returned to their initial positien, whereupon the bolt is retracted and the table freed. f

its the mount leaves the spacing and cut tingmechanism 'at position D it is ready to have the filament applied to it. [The rotation of the table carries it to the filament' applying mechanism at. position ll, where the filament is automatically secured to the l ends' of the leads, given the proper shape and length, and then cut off from the spool of' Wire fromvvhich the filament is formed. This filament applying mechanism includes a filament wire feeding device for supplying filament Wire from a spool, a filament at-fr 'Ataching and shaping device' for securing the filament to the leads, and simultaneously givingit the proper shape, and alilament Wire cutter for cutting thefilam'ent Wire after th'e filament has beensecured to the leads.

The filament may be secured to the leads in various Ways, as by bending theends of the leads into hooks cr in any other suitable way, but 'I prefer to attach the filament by embedding it inthe leads by pinching. The drawn tungsten wire commonly used for -filaments is very much harder than the leads, which are usually made of a nickel steel wire coatedwith copper, so that if the filament wire is placed across a lead and the wire and lead are pressed together `with a powerful pressure thc filament wire will sink into the meta-l of the lead and be firmly embedded init, making, a good electrical connection which is mechanically strong.

rl`he sequence of` operations and the yvai rions steps of my method of' fastening the ccifilamcut to the leadsmay best be understood by reterringto Figs. 2 to l2 inclusive.

The end ofthe filament wire. 30 is so held,

i asshoivn in Fig. 2, that as the leads move to position E lthe forward lead 31 encounters 1 the filament wire and bends it into the `clamped to the lead and will not be displaced during subsequent operations. The filament wire guide 38 is now moved into the position indicated in Fig. 6 and swings the Wire 30gacross the path ofthe other shapingVblade 35 which thenl advances, enn aging the filament Wire vand dravvingniore 'lament wire through the guide 38 afd off the spool until finally it overlaps the other shaping blade andthe filament is S-shaped, as indicated inJFig. 7, with its ends lying transversely across the leads 3l and 32. The

shaping blades

34 and 35 hold the filament in `shape while the pinching jaw 36 presses the Wire into lead 31 and pinching jaw 37A presses lead 32 against the Wire and thereby embeds itin the lead. is no force exerted during the pinching which is 'apt to cause displacement of the leads lengthwise of the Wire the filaments are all of very uniform length., l/Vhile the pine/hin i jaws are still closed the 'filament 'Wire 0f iide 38 is retracted as shown in Fig.

As there 8 ,to leave a considerable length of Wire l bet veenY theguide and the lead 32. lt re'- mains .inthis position vWhile the pinching jaws openand the shaping blades separate, as shown in Fig. 9, Whereuponthecutter 39 cuts the 'filament Wire close to the lead 32, freeing the mount rfrom the rest of the filament wire and leaving a projecting end of the filament Wire 30 of such a lengththat '-vvhenthe guide 3S returns -tc the position of Figs. 2 and 3 theI end of the filament Wire jvill project far enough from the guide tc overlap the lead 3l Ias shown in Fig. 3.

The filament applying mechanismfin the particular machine illustrated, is bodily movable toward and away from the table 48. In theA particular arrangement shown the pinching'jaws or pins 36 and 37, normally held separated. by springs, are mounted, as best shown in Fig. 17, in bosses 70 on a sliding block 7l which hasl a supporting member 72 for the'shaping blade 34- and is held by a set screw 73. Bell cranks 74 for actuating` the pinching jaws are held a spring 7 5 in engagement with a sliding cam 7 G having cam surfaces 77 and 78 so re'- lated that as the sliding cam moves tdthe Aright inl Fig. 17 the pinching jaw 36ifi's closed just enough to clamp. the Wire tolthelead 3l ico before the otherA j`a\v'.,is moved. YThis cam 'normally rigid but-yielding connection .be-

'enough to act as a 'rigid connection betyveen 4thesliding cam 76--andf-the sliding ,bloeitA will yield and perniit the camto slideon the block if the block is held'stationary by some I i' may be mounted on the blockl in position to While Lthe. table 48' is movin'g. f

' is., to the right as Figs. 13 and-19 are drawn. At first the block 71 moves with the cam be- 40 nism is in. active" relation to themount, as

thel shaping blade 34 between the leads of y the mount.

, initted-by compression of the spring 81, until bell crank to more pinching pin 36 toward l, between-the leads' and overlaps the blade 34.

fas best-shown in Figs. 18 and 19, to Vmove `cured to thebase 40.- -The sliding ,'c'ain' ing a grooveshape as' s ovvn toimpart the desiredmovements 'to the 4sliding cam 476 and the block 71; T -he s `ring 81 is normally vfilament applying mechanism moves for.-

ward into active position beeausethe cam 84 begins to rock the arm 83 and move bot the shownin Fig. 5.

blade 35 is automatically'moved,into posi# radially of the table on a standard A'Z9 se-"iniddle by aspringhinge 87".vvhich'permits has a lost motion connection -to thebloek 71 through a pin 80 in-.the block extending into a 'slot' in thev cam. `There is also a mounted, tobeswu l`toonesidej This arm is mounted on a roc shaft 88'a'etuated Vby a crank arm 89 controlled by an adjustable stop 90 which limits vthe travel of the crankl tween the cam and block'through a. comf' pression spring 81wbetween the block and a.. i I

' aI cam 92 monntedgon thejdrive'shaft 42 and.

y so timed with relation to the-:other parts off lever. 83 to' an actuatin face-cam 84 -ba'vthe blade35int place while thesliding cam of. the: length shown in igf19Q-and ifs'stroung 71 as long as the block is freejtomove, but

means, such'as an adjustable fs'top 85, which engage the standard 79 when the' block is in its forwardposition shown in Fig.v 18.

' The filament applying-mechanism isl in the idle position 'shown in Figs. .9 and 19, l

y p Vhen the tableis. locked by the locking'bolt-G Witha projecting endof the proper length when a mount at position E, the endof the-fila.- ment'wire 30 extends across one of thelea'ds, as indicated in Fig. 3, and thereupon theindicated Fig.'8. The pinching jaws and 9 from therest of the wire.

Wire guide 38, which may be a' blockhavingl in it a helpe slightly-larger than the Wire,

and whic i of anarin Qifjnounted to''swingi n a vertical planel---The feed ofthe wire 4through-the guide is controlled by some suitable friction or" tension device, such as a spring blade94 block 71 and sliding cam 76 forward, that cause the spring 81 is stiff enough to act' like a rigid connection as long as the block is free to move. Vhen' the block reaches the position shown in Fig. 118, andA the mecha- 93, and preferably having a pad of felt or leather underit inpositionto press on the Wire. This arrangement permits the Wire top-be` drawn through-the guide, butfholds it'in the position in which it is left.4 'The indicated inl Figs. 4to 8, the stop 85 strikes the standard 7 9 Land the block stops, With The'sliding cam 7 6 now slides on'the block and enters-between the ends of plane and has a bracket 95 with a spindle the bell cranks 7 4, this movement being peron which a spool 96 of'filamentwire can be `held by ay friction clamp 97 best shown. in Fig. V1.2 to prevent the spool turning too g .freely 'lhe arm is vmounted on an insulat-v the shaping blade 34 to clamp the end of the VAing horizontal axle 98 detachablymounted f tungsten filament wire to the lea-d 31' as `on pivots -in a frame 99 andis positioned by 'lhe cam 76 now remains an insulatingblock 100 ni'iun'ted on the arm statiol'iary while the filament wirefceding mechanism is actuated, as hereinafter described, to draw the'flament wire into the path of the othershaping blade 35 as shown in Fig. 6, whereuponv the other shaping the cani. surface 77 lcauses the corresponding The arm 54 b'dily movable in a'borizonta'l about a vertical pivot 102 set in a 'standard 103. The `arm 93 has a rounded edge which,

tion, as shown in Fig. 7, where it is -in place ger 10.4 made of vfiber or other insulating material and secured tol the' standard 103;

The shaping blade 35 is carried on the lower The pivoted frame is swung in a horizontal v lament -is mly 'embedded-'in the' leads, `as

.the lament is ont off as indicatedin Fig.;".=-.

end of Aan arm resilientlyjointed `near the the lower'end, from which fthe] blade 35 is xa'mfnnand thereby' of the blade The i y crank arm -is actuated through' aired 91-fro1n j.

the'.'mechanismand'somshaped as .to swing 76 is' stationary,- and to hold itin' lace until i the shapingblades nowfjreinainfstationary! while the :filament wirefeedi,xi`g1meeitnism oves the wire guide backalong Wire -1j efposition, as indicated in Figyl; to leave i The filament: feeding mechanism, which best shownin` Figs. 10'to 12, comprisesthe `-mounted onfthe'free loiver end cooperating with' a part or end-of the arm .i 5

armA 93 is pivotedto sw'ing in a' vertical and resting against an adjustable' stop v101.

plane, as the frame -99 is'vmounted to'siving'" cooperates with an adjustable stationary 'n f..1:

plane byla link 105 actuated by a crank 106 on the upper end oi a vertical rock shaft mounted in a vertical pillar 197 and rocked by a crank S on its lower end through link work 109 from a cani 110 on the drive shaft i2.

'lhc c vclc ot operation ot thelament wire tcedinir mechanism is as follows: Assume (hat the wire guide 38 is in the posi tion ot' Figs. 2 tof)` which may for convenience becalled its first position, and in which it holds thc filament wire with its projectingr cnd in place to overlap the lead' 31. lt remains in this position until the end ot the filament wire has been clamped between the pinching;1 jaw 36 and`one ot the leads ot' the mount as shown in 5 During the clampincr oi the filament Wire to the lead the frame 99, as best shown in Figure y153, is in its first position. where the lower end of the 'spring hinged arm 86 on which thc shapinfir blade 35 is mounted is held out of the way and in the position shown` in F igures 2 to 5 by the projection 111 on the spool 'li'ockets 95 carried by the frame 99. After the pinching jaw'SG has clamped the wire and lead 31 to the shaping blade 34 as I above described, so as to grip the end ot 'arm 93 is tilted and the wire guide 3 8 is 'drawn `hackl to the position shown in Figs.

vthe wireu the frame 99 swings in a clockwise direction into the second position shown 1in Figfli, where the rounded edge of the arm 9? just. touches the end of the lifting` finger 104. This movement ot the frame 99 permits the shaping blade 35 to swing back :into the' operative positioni'ishown in Figs. 6 to (S becausethe jointed arm 86 straightcns out when the spool bracket swings out of the way. and also stretches the filament wire across the path oi' the shaping; blade 35, as shown in Fig. 6. so that the wire is caught by the shaping' blade in its forward movement and laid across the end ofgthe lead 39. whiclris free from the pinching jaw, so the lilament wire is-now across the ends ot the leads ready to be,` attached to them.

Dur-ingr the shaping oitl the filament the 'frame 99 remains stationary in the second position` while the shapingblade 35 advances intoplace alongside the other blade fi-l as shown in Fig. 7, thereby shaping' the `filament and at the same time pulling' as much wire as required ofi the spool because the end of the wire is iiimlylield between thc pinching jaw 36 and the shaping blade S4, Both the pinching jaws are then actuated by the 'forward movcn'ient of slidinp; cam 7G to' sink the ilainent wire into the lead, and, while the jaws are closed` the filament wire 'feeding' mechanism makes the final movement of its cycle during; which the 8, 9 and 12, so as to leavea relatively end ot wire projecting from the guide. y

The iilament Wire feeding mechanismis long now in its third position but the iilaiiient is still a part of the wireon the spool 96. The lilamentis cut oli from the rest of the wire and the finished mount is treed` while the iilament feeding mechanism is in its, third position and'after the pinching jaws have moved back out of the Way, 'as indicated in Fig. 9. Any suitable form of cutting' device can be used, but the form which I prefer. and which has been used successfully, is an electrical cutter 89 ot which certain parts are shown diagrammatically in Fig. Q0. As indicated in this ligure the cutter consists essentL ly of two electrodes 112 mounted side by side and separated by insulation 113l which may i-ii practice be a sheet ot mica about 1 /Gjsiof an inch in thickness. The two electrodes are connected to the terminals ort a battery and with the lsize oit' tungsten wire ordinarily nscd,"a potential or six volts or less is sufiicient to operate the cutter. In the particular machine shown, the cutter 39 is pivoted and carries the two electrodes to which the electrical connections are made by sliding* contacts 114. The cutter'is actuated at proper `intervals to bring the electrodes to `the wire through a push rod 115 actuated from a cam on the 'driving shaft 4Z The mechanism is so timed that the cutter swings up to bring. the cuttingf electrodes.l into contactwith the tungstenwire just after the filament Wire feeding mechanism has, finished its movements andthe filament attaching mechanism has moved back out of the way into the position shown in F ig. 19, so that at the time of cutting the wire the parts are in the relative position indicated diaeraminatically Ain Fig. 9. The cutting electrodes swing up into Contact with the wire and sufficient current flows from one electrode to thevother at the point of contact with the. wire to. sever the wire and leave the mount free, to be carried along by the table to a. point where it can be removedI from the holder. f i y VVhileI have described my method as exempliiied in the making of mounts' for incandescent lamps, it is applicable to the manufacture of many other artic-les Such as certain types of fuses, detonators,` and similar devices which consist of a -detinite length of wire supported by two other wires or supports held side Aby side by a glass -bead or similar spacer. Various modifications and changes in the order of 4the steps of my method may -be `inadc witlioiit de- 'partmg'frommy inveiitioii,'and I wish it to vbe understood thatmy. invention includes all changes and modifications within scope of the appended claims.v

`What .I lclaim as new and-desire to secure by Letters Patent of i iin the United States. is.

1. The method which comprises' holdingfi( the end of a long wire immovable in contact. With-one of .two accurately 'spaced-and positioned other lead tact at sun-intermediate point on saidwire determined by thepositi'on of said other lead, .securing the wire oints of contact, and acent said intermediate point;

2. The method which comprises lclamping one end of a long wire to one of two spaced the other lead relatively to 'contact and thereby include apredetern'iined len h of wii'e in circuit, securing the wire l Perl toning said wire to both leads at the points, of'contact, and cutting n n n ML- n and positioned leads, movingsaid wire and ing ,them into to oth. leads at the points-of contact, and cutting the wire. A The method which comprises holding a long wire perpendicularly across and in lcontact with one of .a pair of spaced and positioned leads, producing relativemoyement of said wire and leads to lay said wire endicularly across the other lead,.fas

the wire adjacent said other lead.

' the end of afilament wire in contact withv 44r. The method whichscomprises holding the end of a long wire in'contact with one of a pair of s aced and positioned leads,v

bending the a jacent portion off thcgwr into place between saidleads tobrlng 'it into contact with the other lead, fastening thewire to said leads at the points of contact, and cutting the wire. 1 f

5. The method which comprises holding one of a pair of spaced and positioned leads,

bending thev adjacent portion of the wire' to bring it into contact with the other lead at apoint on the wire a greater distance from the first lead than the distance between the leads, and fastening the wire to both leads at the points of'contact.

6. The method which comprises holding I the end of a filament wire in contact with one of a pair of spaced and positioned leads,

bending the adjacent portion of the 'wire in one direction around one shaping member,

` and in the reyersedirection around another shaping member, and-moving said membersand leads relatively to each other to bring the other lead tinto contactwith'the wire at a point on the wire beyond the second bend and thereby include both bends in circuit between the leads, and fastening the. wire to the leads at-tho points ot contact.

A7. The method which comprises holding theend of a filament wire in contact'. with one of a pair of spaced and positioned leads,

holding Va shaping member adjacent one lead with thejwireacross said member, Amoving 60 a second shaping member into engagement with thev wire and thence into a predeter- 'inined .position With'rela'tion to .said-first member thereby. bending the .wire around said membersl in a reverse. curve, bringingleads, moving said wire and tlie relatively to bringthem into convtheend of'a' filament to both'lea'd's at the cutting thewire ad the wireinto contact with the other l'cad, and fastening the .wire to both leads,V

8. The method which comprises holding 'l wire in Contact with one oa pair of spaced and positioned leads, placing a shaping member between sai leadsand in contact with an adjacent portion of the wire, movinga second shaping member into place between said leads iii a direction to engage the wire and bend' it around thefirst shaping member and thereby i'eversely curve -the wire and bring. it

into place' betweenthe leads and in contact with the other lead, vand fastening the wire to the leads.Y

9. The method which comprises holding the end of a filament wire in- Vcontact with one of a-pa-ir o' spaced leads, bending the adjacent portions of the wire while its endj isso held to greater-than the length of" a vstraight 'line 'betweenvthe leads, andfasteni'ngfthe Wire to the leads at the points of contact. E

10. The method which comprises holdin v the end of a filament wire in contact with one of a pair of spaced leads, bending the wire: around a Shaper which substantially lfills the space between the leads and places the wire in contact with 'the other lead,.

andA gripping the leads and Shaper between pinching jaws, to exert Isufficient. pressure along' a line joining #the two leads to ycause the wire -to be embedded in the leads.

11. The method which comprises placing acrossa pair ofleads a wire bent into a reverse curv/eivhich fills the space between theleads and' causes the wire to lie across the oth'e/r leadisu'pporting the bent wire to prevent closing up of the bends, and ex erting upon theleads and wire in a direcbring it into contact with tlm'I other lead with a length ofwirc in circuit tion tending to close said bends a pressure suiicient to embed the wire in the leads atv the points of contact.

12. The methodwhich comprises Placing of spaced leads, clamping it to said lead to hold "it against displacement, bending the adjacentportion of the wireinto a reverse curve' which fills the space between the lea-ds and causes the wire tolie across the other lead,l and embeddingthe -wire in the leads at the points of contact. i

placement, bending 14. -The method-which comprises placing theend of a long Wire acrossone ead of a pair of'spaced and positioned leads, clamping it to said lead to hold i-t against disthe adjacent portion of the wire into a reverse curve which fills vthe space between the leads and causes the Wire to come into 'contact With the other lead with a predetermined length of filamentwire in circuit, and supporting the bent Wire to prevent closing up of the bends, embedding the wire in said leads at the points of contact by pressure exertedin' a direction tending to close said bends, and cutting the wire adjacent oneof said leads.

15. The method which comprises spacing land cuttin mined distance apart, clamping the end of a long filament wire to one of said lead wires near the end' thereof, bending Ithe adjacent portion of the filament wire to insert itbetween said leads and bring it into `contact with the other lead at a int dependent upon the spacing of the lea s, mechanically and electrlcally connecting said .filament wire to said leads at the points of contact, said filament wire adjacent one of saidl In witness whereof,' I have hereunto set my hand this 23d day of November, .1921. `WILLIAM n. BURROWS.