US1596732A - Method of and machine for mounting filaments - Google Patents

Description

'AugLl? Filed Dec. 2, 1922 3 Sheets-Sheet 1 5 N I, G wq T H u 0 J ATTONEY Aug. 17, 1926.

' J- J. vHIGGINS METHOD OF AND MACHINE FOR MOUNTING FILAMENTS Filed Dec. 2, 1922 3 Sheets-Sheet 2 INVENTOR JOHN J. H/GC/NS ATTORNEY operatedto positively feed a filament dur Patented Aug. 17, ,1926.

(UNITED;

JOHN .rosnrrr HIGGINS, or ELSE-ORANGE, NEW JERSEY, AssIeNoR TO wEs'TINe Yrs-96,732

PATENT OFFICE- HOUSE LAMP COMPANY, A. COBPORATION" OF PENNSYLVANIA.

METHOD or AND MACHINE For. MoiiN'rINe FILAMENTS.

Application filed December 2, 1922. Serial No. 604,459.

' This invention relates to the manufacture of incandescent electric lamps and more particularly to a machine for mounting filament wire upon the. support-wires of a lamp-stem.

An object of the invention is to provide a machine which'may be operated to automatically drape a filament ontosupport wires of a lamp stem.

Another object is to provide a machine having coordinating elements which may be ing a mounting operation.

.An additional object is to provide a machine which may operate to automatically mount a filament of an accurate predetermined length upon support wires of a lamp steml A further object is to provide a machine which may be adjusted tooperate to feed different lengths of filament upon stems for lamps of different wattage and Voltage.

Astill further object of the invention is to provid a machine?- which may be expeditiously and conveniently operated to mount a'filamentupon support wires without manual. handling of the wireand which may be operated to clamp the filament. Wire to 'the leading-inwires of a lamp stem.

Other objects and advantages will be ap-' parent as the description proceeds.

The manufacture of incandescentelectric lamps includes an operation termed mounting which comprises the-disposi tion of a filament" wire upon the internal structure of a lamp. -It will be understood that an incandescent electric lamp includes a so called stem comprising glass parts, namely a fiare'tube and an arbor which are fused'together and united, leading-in Wire being at the same time embedded in the union of the flare and the arbor.

In lamps of the tipless type, an additional part termed an exhaust tube is also consolid'ated with the other glass parts and a communicating passage is provided for the purpose of exhausting through the exhaust tube, after the stem has been sealed into a bulb. After the arbor has been consolidated with. a flare tube, support Wires ar inserted, preferably in suitably spaced enlarged portions or buttons provided on the arbor; V

The [support wires are disposed radially and spacedabout the circumference of the buttons. Different types of lamps hav dif ferent numbers ofsupport wires.- As an example, a certain type of lamp may have .six upper support wires and five'lower sup-- port wires, each set of wires being stag gered with respect to the other. That is,'a

lower support wir will be positioned in -a- The stem, when provided with support wires, is then positioned in a holder and the end of a filament wire isjclamped to one of the leading-in wires and then carried over upper and lowersupports alternately until it has been properly disposed about the-arbor, after which it issecured to the other leading-in wire and severed.- When the stem is equipped with a filament it is termed a mount; The operation of. mounting a'filamenti as heretofore manually accomplished, was one requiring the exercise of a-high grade of skill and the dexterity necessary to properly mount a filament could only be acquired after considerable practice. i

Filament wire is extremely fine and of a color wh'ich makes it diflic'ult to see and hence difiicult to handle. The lack of rigidity of the support members makes it necessary for an operator to be extremely care ful not only to properly position the fila:

ment but to avoidbending the support wires from their position and thus vary the length of the filament required for a particular stem. i I

'In the manufacture of a volume product, such as an incandescent electric lamp, it is an advantage to avoid all hand operations particularly such ope-rations which require trained operators. The present invention provides a'machine which may be actuated to automatically drape a filament about the support wires of a stem. Furthermore, the machine is adapted to operate so as to feed a filament of such length as may be predetermined and governed by an adjust ment of certain machine elements. p

A machine for the above purpose may comprise a rotatable holder for a lamp Stemhe holder may be so disposed as to position a stem with the support members thereof in operative relation to a reciprocable filament-carrier provided with a' guide through which a filament may be fed, means being provided to secure the free end of the filament. Means may also be provided for forming hooks upon the leading-in wires and the stem may then'be moved to position an end of the filament within the hook of a leading-inwire. Clamping mechanism may then be operated to close the hook and secure the filament. The filamentcarrier may then be reciprocated and at the same time-the stem holder may be intermittently rotated a given number of degree with each stroke of the carrier.

During the reciprocation of the carrier, mechanism may operate to positively feed the filament from the guide, thus upon a sufficient number of reciprocations, the stem will have been rotated the required number of degrees and a filament of-a given length disposed upon the support wires. The filament may then be clamped-ta the remaining leading-in wire and severed, where on the mount will have been completed and may be removed from the machine.

The foregoing general outline will be more clearlyunderstood from the following dewhich,

Fig. 1 is' a front view in elevation of the machine, parts being shown in section; Fig. 2 is a fragmentary, front view in elevation, partly in section and showing, in

' dot-dash lmes, a different position of cor- 1, and showing a -device for forming hooks' upon the leading-1n wlres and mechanlsm for tain machine elements;

Fig. 3 is a side view in elevation of the machine, partly in section and part1 broken away to more clearly show certain eatures;

.' Fig. 4 is a transverse view taken on line IVIV in Fig. 3 and showing a ratchet and pawl mechanism for operating a; stem holder; v Fig. 5 is a sectional plan view of a portion of the machine, taken on line V- V in Fig.

closing the hooks Fig. 6 is a view in elevation of a rtion of themechanism shown in Fig. 5 and ehows the device for forming the hooks upon the leading-in wires;

Fig. 7 is'an enlarged front view of a gripping device for 'securin the filament' wire;

Fig. 8 is a side view 0 the gripping device shown in Fig. 7 and illustrates the position of a stem w th respect to said device;

Fig. 9 is an enlarged detail of mechanism for producing a unidirectional rotary motion of feed rollers during the reciprocation of a filament carrier;

Fig. 10 is another detail of the mechanism shown in Fig. 9 illustrating two positions mounted thereon.

A machine embodying the present invention may comprise a base plate 15 having uprights or standards 16 and17 secured Fig: 13 illustratesa stem having a filament thereto. The standards are spaced 9. suitable distance apart and disposed in a common vertical plane. The standard. 16 is provided with brackets 18, 19 and 2I-and the standard 17 is rovided with brackets 22 and 23. The bracli arms 24 and 25, respectivel each of the arms havin a slot 26 (see Fig. 5).

At opposite sides of the ends of the arms 24 and 25 are positioned rods 27 and 28. These rods extend'from one bracket to the other. Other guide rods 29 and 31 are also secured in the arms 24 and 25 but extendscriptlon and the accompanying drawlngs, in

bers 38 and 39 respectively These members ets 19 and 21 are provided with project from and extend partway across the I interior of the carrier 33 and are adapted to constitute a filament-guide 40 for a filament wire 41, which may be supported on a spool disposed on a bracket 43 inte- 4 48 spaced apart and disposed in parallel relation. A feed roller 49 may be rotatable uponthe trunnion 45 and dis osed between the arms 4'1 and 48. A secon ing roller 51 ma be rotatably positioned on a shaft'52, WhlCh shaft may be disposed feed or drivin the slots 54 in the long arms 47 and 48 of the rocker member 44 and in apertures 53 in the sides of the carrier 33.

The roller 51 ma tained in contact wit the roller 49 through the action of s rings55 secured to the shaft 52 and to suita 1y extending brackets 56 fastened to the carrier. The filament 41 maybe threaded through the filament-guide 40 and between the contacting surfaces of the feed be resiliently mainrollers 49 and 51.. The feed-rollersrm'ay 1 s I so disposedthat their contacting surfaces he "in a plane coincident with the longitudinal axis of the guide members 38 and-39, the guides bein so disposed asto receive a filament an align it when passed therethrough. Thus a movement of the rollers will operate to move or feed filament through the carrier 33. It is obvious that the rollersfmay be made of any suitable elastic material or material of such character as to provide thenecessary frictional engagement witha -filament.

The feed roller 51 during the reciprocation of the carrier is driven by providing the shaft 52 with a loose inion 57 secured to the feed roller 5-1 an adapted to be moved when the pivoted member 44 isoscillated int'o mesh with the teeth of one of the racks 58 and 59. The racks may be disposed at opposite sides of the pinion 57, suitably spaced therefrom and secured to the arms 24 and 25 of the brackets 19 and 21. An alternate engagement of the pinion 57 with the racks results in a rotation of" the feed rollers 49 and 51 in one direction during the up and down movements ofthe carrier 33. Thus, if upon an upward movement of the carrier, the pinion engages with the rack 58, it will be rotated in the direction indicated by the arrow in Fig. 1. Upon I the downward movement of the carrier when the pinion is engaged with the rack 59, the rotation of the pinion will be in the same direction. It .will be evident that by reason of this movement, a unidirectional feed will beimpa'rtedto the filament-41.

Mechanism for producing the above actuation of the pinion 57 may comprise a link 61 pivoted to the' arm 46- by apin 62 and to an arm 63 of a reciprocable guide 64 by a pin 65. The guide 64 may be slidable upon the lowersections of the guide rods 29 and 31.

Motion is transmitted to the guide 64 through a connecting rod 66 which is pivoted on a stud. 67 fastened in "a friction plate 68 which-plate is disposed in lateral grooves 69 of a slot 71 radially positioned in rotatable member of disc 72. The friction plate 68 may be secured at variouspoints'along the radial slot to give a variation in the stroke or cycle of movement of the connecting rod 66. v The disc 72 may be-securedto' a shaft 73' journaled in bearings- 74 and75 (Fig. 3) and an actuatio n' 'of the shaft may be had by amanual-rotatipn of a hand wheel '76 be removed by unscrewing.v B

or by-*mean's of a suitable belt connected .with a sheave 7,7,and a source of energy (not shown). The handleor grip 80 may reason of the connecting rod 66-.thegui e 64 is re-- ciprocated and consequently translates-similar motion to the carrier 33 by. reason of the 52 and to link 61. Upon the up stroke ofthe connecting rodj66, the link 61 imparts an upward thrustto the end of the arm 46 thus rocking the rocker member 44 and causlng the teeth of the pinion 57 to engage with the rack 58.

.78 and 79 are disposed.at opposite sides and adjacent to the carrier. These guide plates are positioned in parallel relation and are secured to brackets 19 and 21 by means of tap bolts 81 which extend through slots 82 inthe plates thereby permitting their vertical adjustment. The plates 78 and 79 are so disposed-that an edge of each is spaced a suflicient distance apart topermit a vertical movement of the shaft 52 which extends from the carrier 33 on both sides and between the guide plates.

As illustrated in Figs. 1 and 10, the shaft 52 is removed from the surface 83 of an edge of plate 79 during the upward movement of the carrier, however, upon a reverse movement of the link 61, the rocker member 44 is actuated and the pinion 57 is-urged toward the ,rack 59, but surface83 is so positioned as to make contact with the shaft 7 prevent the engagement of the rack and pinion 'until a downward movement of the carrier has caused the shaft 52 to traverse the surface 83 and make contact with a surface 84. disposed in a plane the return or upward movement of the link 61, the rotation of the pinion 57. will be continued in the same direction for a portion of thestroke by the effect of similar but oppositely disposed. surfaces 85 and 86 of the guide plate 78. i

After the filament "has been threaded 7 through the member 38 of the filament-guide 40, it is passed between the feed rollers and through the other member 39 and thence may be led'downwardly and gripped between a pair of jaws 91 and 92, the operation of which will be presently described.

A stem, 93 which may comprise a flare tube 94, arbor 95, exhaust tube 96, leading-- in wires 97 and 97 and the usual support wires 100 inserted in the upper and lower buttons of the arbor, may be supported betop button of the stem (see Fig. 11). A

tween upper and lower centering members or ,pins 98 and 99 respectively. The n per pin.98 may consist of a pointed member avfingfthreads-101 and may be screwed verticallythrough an end of arm 102 of the bracket 23. The pin may therefore be advljusted vertically and may be held in a fixed position by a lock nut 103. The pointed end of the centering pin 98 is adapted to enter arecess in the upper surface of the machine for producing stems with a recess is. described and claimed in the copending application of Madden and Higgins, Serial No. 565,126, filedJune 1, 1922, lamp making pointed ends, other means may be employed to' secure the stem as, for instance, an end of the centering pin 99 may be provided with a socketto fit the end of the exhaust tube. A similar arrangement may be employed for holding the upper end of the stem.

In addition to the centering pins for supporting a stem, jaws 105 and 106' are provided at the end of bell crank members 107 and 108. respectively; These members are pivoted on pins 109 secured in bearings of a thimble or sleeve 111. The jaws are normally urged toward each other or to their closed position through the action of springs. 112 disposed between projections 113 of the sleeve 111 and arms 114 of the bell cranks 107 and 108. a e For the purpose of positioning a stem between the centering members, the lower member 99 is adapted'to be moved downwardly with the sleevelll and is secured to the sleeve by a pin 115. The sleeve is slidably disposed upon a hollow shaft 116 that extends through a hub 117 at the end of an arm 118 of the bracket 22. This shaft is provided with an integral-collar1'19:and between the collar an the upper surface of the hub 117 is disposed an anti-friction memher 121, which may. comprise the usual form of bearing is, for instance, a plurality of balls in a-ballrace.

The shaft 116 ma extend below the hub 117 and have secure thereto a ratchet wheel 122, the shaft being thus prevented from "ertical movement. The ratchet wheel ma 1 be intermittently rotated to rotate the sha t and consequently the stem secured by' the jaws 105 and 106. Mechanism for performing this operation will be presently *described.-

For the purpose of maintaining the sleeve 111 and consequently the centering member 99 in an upper normal position the'shaft 116 is provided with a recess 123 and a spring 124 is positioned about the member 99 and stem and. simultaneously results in a closure of the jaws 105; and 106, to grip the stem and revent its rotation with respect to the hol er 108. For the purpose of preventing" relative rotation of the sleeve 111, a guide rod 126 may be secured in the upper surface of the collar 119 and disposed in an aperture 127 provided inthe sleeve 111, the sleeve being thus movable vertically with respect to the rod 126.

The intermittent rotation of a stem secured by the jaws 105 and 106, is-accomplished through the action of the disc 72 which is provided with two cam surfaces or projections 128" and 129 disposed at the periphery of thedisc 72' and in substantially diametrically opposite relation. As the disc is rotated, the projections may alternately engage with a r01 end of a slide rod 132 positioned in a bearing 133. The opposite end of the slide-rod may be integral with or suitably secured'to a pull-rod 134 having an end thereof dis posed in operable relation. to the ratchet wheel 122.. Springs 135 and 136 are secured to the pull rod and to the bearing 133 to normally urge the roller 131 toward-the disc 72 and in the path of the projections 128 and 129.

An end of the pull rod, adjacent to the ratchet wheel, is provided with a-pawl 137 (see, Fig. 4'), disposed in a casing 138 in the usual manner. A guide 141 is provided to afford a bearing for a' horizontal portion of-the pull rod-134. 7

When the disc 72-rotates 180, the projection 129 will engage with theroller 131 and cause an actuation of'the ratchet wheel and a rotation of the stem a number ofequal to half the distance between the upper support wires.

It will be appreciated'thatwhen the-nextactuation of the ratchet wheel occurs, the filament carrier will have been moved to the er 131 disposed at the within the hook thereof. 1

are disposed on studs 143 and 144 respectively, integral with an oscillatory member 145. The latter is pivoted on a pin-146 in a bearing 147 secured to the end of the arm 24 of the bracket 19. The jaws may be integral withyhubs 148 and 149 having pinions 151 and 152 respectively pinned thereto, the pinions being so disposed as to mesh together. .1 An opposite movement or opening of the jaws may be caused by a movement downwardly of a lever arm 153,

'whicharm may be integral with one of the hubs of the jaws, for instance, the hub 149.

A spring 154 havingits ends secured to.

the arms of the jaws 91 and 92, serves to maintain the jaws normally closed. The jaws may, however, be secured in an open position by a latch 155, which is carried on an arm 156, secured to the oscillatory member 145. A stop 157 is provided to limit the movement of the latch 155 in one direction, a spring 158 being provided .to maintain the latch in contact with the stop When the-lever arm 153'is moved to'bpen the jaws and the end of the arm passes a lip 159 of the latch, the jaws are held open and may be released upon a downward movement of the latch.

It will be appreciated that by reason of the oscillatory member 145, the jaws are movable in a plane transverse to that in hich they move when opening and closing. Thus when the portion '39. of the filament guide is positioned as shown in. Fig. 8, and the filament is gripped by the jaws,- the end of the filament-guide will be disposed beneath a beveled edge 160'of the jaws The filament guide may, however, be moved up.- wardly and by reason of the oscillatory member 145 to which the jaws 91- and 92 are attached, the jawswill permit the passage of the guide as-it is moved and makes contact with the beveled surface 160.

The jaws 91. and 92 may be returned to their normal position by a spring 161', secured to the oscillatory member 145 and to -a. suitable bracket 162, and a set screw 163 may be provided to limit the upward movement ofthe' member 145. The jaWS 91 and 92 may grip the filament and hold The double bend is provided so that a filament may enter into a loop, on either side of the leading-in wire. Mechanism for producing this double bend may consist of a member 161 (see Figs. land 5) slidably disposed upon the standard 17 and maintained from movement about the standard by a feather 162. Collars 163 and 164 provided with set screws may be adjustable upon the standard 17 to limit the vertical movement of the slidable member 161.

The member 161 is provided witlr op-- positely disposed extensions 165 'and 166, the longer extension 166, having recesses 167 which may comprise the female portions of dies for bending wires. Male portions of the dies may consist of ribs169 and the end or pins 171. The male portions may be carried at the end of arms 172, the arms being pivoted upon a pin 173 secured in the extension 165, and provided with handles 174 pivoted on pins 175, the handles being normally maintained against stops 176 through the action of relatively strong springs 177 which may be secured to the handles 1'74 and to the arms 172.

The pins 171 may be operated by levers 178 wluch are adapted to make contact with the pins and are pivoted on tapbolts 17 9 secured in the arms 172 and connected to the handles 174 by links 181. Thus the handles 174 ma be grippedto move the arms to bring t e male members 169 into the female portions of the dies thereby bending one loop in the wire. Springs 182 normally maintain the-pins or male members 171 from engagement with'the wire during this first loop forming operation, the springs 177 offering suflicient tensional opposition to permit the forming of this first bend without causing any actuation of the levers 178. However, when one loop isformed, a continued pressure upon the handles 17 4" servesto overcome the opposition of the sprlngs- 177 causing the levers 17 8 to make effective contact with the pins171 and thus thrust the ends thereof into the female portions'168 of the die with the result that a second loop --.is formed in the wire. This loop forming devicemay be moved to position to form the loops but may be removed after the loops are formed to a lower position as, for instance, thatindicatedin dot-dash lines in Fig. 1. Forthepurpose of frictionally maintaining the loop forming device in a it in position until a leading-in wire is'sm given: position, a 'tension'rnember S ch as I t 1e spring 183-may be provided, one end bedisposed that the filament is positioned Hooks may be provided in the leading-in ing secured to a collar integral with the lower side of the slidablemember 161, the

.engagement with the standar 'ing-in wire. Double 100 free end of the spring bein in. tensional shown in Fig. 1.2 in which a projection 194 The advantage of providing the leadingin wires with a double loop will be apparent from the fact that by means thereof, the stem may be rotated either in a clockwise or a counter-clockwise direction to position'a filament in a loop on either side bf the leadwires are, in the present construction, desirable inasmuch as the leading-in wire 97. is positioned by a movement of the stem in the direction of the arrow X, (Fig. 5) whereas during the mounting operation, the stem'is intermittently rotated in the direction ofv the arrow Y. and the leading-in wire 97' is moved to bring it on the opposite side of the filament for clamping. The aboveo erations will be more fully described be ow.

After the loops have been formed in the wire, the stem may be rotated'by turning about its vertical axis, causing the exhaust tube to rotate between the " jaws 105 and 106.. It will be understood that these jaws grip the stem sufiiciently to cause it to rotate with the holder, but that-the stem may be manually rotated between the centering members 98 and 99. -A leading-in wire may be disposedwith the loop thereof about the filament and the loop may then be closed to grip'the filament. For this purpose, a pair of clamping devices 184:"and 185 (see Fig. 5). each comprising a pair of jaws V186 and 187, may be provided at the end of rocker arms 188, pivoted in bearings 189 which may be secured to the guide plates 7 9, and properly located with respect to the leading-in wires 97 and 97 of the stem.

The clamping devices 184 and 185 may be moved to or from their operative positions and, as shownin Fig. 5, one device may be in position for closing or clamping a loop and the other device in its outer position. Springs 190, secured to the bearings 189 and .to the rocker arms 188, serve to normally maintain the arms in their outer positions. Set screws 191 may be provided to afford a variation in the limited movement of the arms in one direction.

When a device, for instance, the clamp 185, is positioned, as illustrated, to-close a. loop, the shank of the jaw 187 may be actuated to operate the jaw and the loop will thus be closed upon .the filament. This first operation of closing a 'loop may be performed prior to the actuation of the filament carrier 33 for the mounting operation.

However, upon the completion of the mounting and when the filament is positioned in the second'or last leading-in wire, it is desirable to sever the wire as it is clamped about the filament. For this purpose one of the clamping devices, for example 184, may be provided with a cutter such, for instance, as that ations required'to mount a filament upon the support wires, a description of operation of the device as practiced will be given.

A stem as received from] the stem making machine may be provided with a' given number of support wires. As an example-,astem havingsi'x upper and five lower support wires may be considered. Itis to be understood that the lamp part referred to as a stem, or lamp stem, includes theaforementioned com onent parts namely the several consolidate glass parts, leading in wires or conductors and the support wires. The l'ead-. ing-i'n wires; 01 a stem as employed in the presentjnvention are straight, no hook havmg been formed thereon. The operator pressesdown upon th'e'levers 107'and 108, thereby opening the jaws 105 and 106 of the stemholder and separating the centering members 98 and 99 sufiiciently to permit the disposition of a stem the-rebetween. A release of the levers causes areturn of the lower centering member and the stem is thus centered and simultaneously gripped by the gripping jaws.

A stem having thus been positioned in thestem holder, the free end of a filament may be'secured between'the jaws 91 and 92. The slidable member 161 which carries the jaws for formingthe double loops upon the leading-in wires may then be positioned so that the ends of the leading-in wires are in operative relation to the double-loop forming dies. The handles 174 may then be operated to move the male dies 169 on the arms I 184 and; 185 are in their outer positions with respect to the filament. The clamping device 185 may then be moved to its operative position with respect to the loop disposed about the filament and the jaws of the clamping det icedisposed upon t e opposite sides of the relatively straight portions of the loop as shown in Fig. 5. The jaws may its upper position and the clamping devices the filament will, however, remain secured be actuated and the leading-in wire clamped to the filament after which the gripping jaws 91 and 92 may be opened and so retained by the latch 1'55. Suitable motion being then imparted to the shaft 73, the disc 72 may be rotatedin the direction of thearrow Z, as indicated in Fig, .1, the carrier reciprocated, and the stem intermittently rotated,

through'their association with the disc 72.

As the filament carrier "moves .from the hook of one support member to another, the filament is fed by means of the feed rollers 57 and 49. It will readily be seen, that by varying the relative position of the surfaces 85, 86 and 83, 84 the filament may be fed during given portions of the travel of the carrier 33. Thus' the filament may be positively fed from above an upper support member to a given distance below a lower support member or the feeding operation may be performed during the movement of the filament guide between the supports.

7 The cam portions. 128 or 129 of the disc 72 may be so positioned as to operate the pull rod 134 when the filament guide is above or below a support-member thus causing a rotation of thestem a given number of degrees. Therefore, with each stroke of the connecting rod 66the filament is carried over a support-member and as the machineis operated, a filament is mounted or draped over the support wires.

When the filament has been mounted upon the hooked support members and the filament carrier 33 is in its lower position, as. indicated in dotted lines in Fig. 2, the filament wire will be in position adjacent to the lead.

ing-in wire 97- and the filament guide 39 may be moved down to below the gripping faces of jaws 91 and 92 to a position as indicated in dotted lines in Fig. 1. The gripping jaws may then be closed'togrip the end of the filament wire and the clamping device 184 operated tov clamp the leading-in wire about the filament and to sever the filament, thereby completing a mount which may then be removed. The filament wire will be secured in the gripping jaws 91 and 92 and the filament earner-may be moved to its upper position. The filament guide 39 of the filament carrier passes the gripping jaws .91 and92. by reason of their pivote connection with the bearing 147. The end of between the grippingjaws to hold it during the positioning of another leading-in wire and .another section of filament may be mounted.

It will be evident that with the present machine, a filament may be automatically draped about the support wires of a lamp stem and that'this operation may be performed with accuracy and dispatch, avoiding any pull or strain upon the support wires stem during because of the positive feed imparted to the filament wire during the mounting operation.

Although I have-shown and described a preferred embodiment of my invention, it is to, be understood that many modifications may be made therein Without departing from the claims.

What is claimed is: v 1. A filament mounting machine compris spirit and scope of the appended ing a lamp stem holder, rotatable members for positively feeding a filament and. means for causing a relative movement of said feeding means and said stem.

2. A filament mounting machine comprising a lamp stem holder, rollers for engaging and positively feeding a filament longitudinally and means for causing a relative movement of said feeding means and said the longitudinal movement of said filament.

3. A filament mounting machine comprising a lamp stemv holder, a. filament guide, means for changing the relative positions of said stem and said guide and means for positively moving a filament.- through said guide during said relative movement.

4:. A filament mounting machlne comprising a stem holder, a filament guide, means means for reciprocating said guide to mount a .filament upon a stem supported in said holder and means for causing a positive movement of a filament through said guide during a portion of its reciprocatory move ment; a

7. A filament mounting machine comprising a lamp stem holder, a filament guide, means for causing a reciprocation of said guide transversely to its axis to mounta filament upon support'wires of a stem secured in said holder and means for causing a positive movement of a filament through said guide during the reciprocatory movements thereof.

8. A filament mounting machine comprising a stem holder, a filament guide, means for reciprocating said guide to mount a filament upon support wires of a stem supported in said holder and means for positively feedto another.

passage of the 9Q A filament mounting machine comprising means for holding afstem, a filament .guide, means for reciprocating said guide to mount a filament wire .upon support wires of a stem secured in said holder, meansfor positively feeding the filament from the guide during the movement of said guide between the support wires and means for changing the relative positions of said support wires and said guide to cause the filament wire to pass between saidsupport \Vll'OS.

' 10. A filament mounting machine comprising a lamp stem holder, rotatable members for positively feeding a filament, means for reciprocating said feeding means to mount a filament upon support wires of a stem and means for intermittently rotating said stem during the reciprocative movement of said feeding means.

11. filamentmounting machine comprising means for holding a lamp stem, a filament guide, means for reciprocating said guide and adjustable means for feeding a filament axially through said guide durlng movement thereof. I

12. A filament mounting machine comprising a lamp stem holder, a filament guide, means for reciprocating said guide, means for feeding a predetermined amount of filament through said guide during each movement thereof and means for varying the amount of filament fed through said guide during each movement. 13. A filament mounting machine com-.

' prising a lamp stem holder, a filament guide,

- thereof.

means for reciprocating said guide, means for feeding filament through said guide during a portion of each movement thereof and means for terminating the feeding of said filament through said guide during a portionof the movement of said guide.

14. A filament mounting machine comprising means for holding a lamp stem, a filament guide, means for reciprocating said guide, means for feeding, a predetermined amount of filament through said guide during each movementfthereof and means for regulating the amount of filament moved through said guide during the reciprocation 15. A filament mounting machine comprising means for holding a lamp stem, means for forming hooks at the ends of leading-in wires of said stem, means for positioning .a filament, means for clamping said filament in the hook of one of said leadin -in wires, means for draping said filament over support members of said stem and means for clamping 'said filament in the remaining leading-in Wire.

16.1A filament mounting machine comguide from one support wire prising a -rotatable stem holder, afilament.

from, means for forming loops in said wires, means for clamping a filament wire to said loops and means for mounting said filament upon support wires of said stem.

18. A filament mounting machine comprising a stem holder, means forforming hooks in the leading-in wires of a stem supported in said holder, means for positively. feeding a filament and means'for causing a relative movement of said feeding means and said stem.

19. A filament mounting machine comprising a stem holder, means for forming hooks in leading-in wires in a stem positioned in said holder, means for positively feeding a filament, means for causing a relative movement of said feeding means and said stem holder to mount the filament on support wires of said stem and means for clamping said filament in the. hooks of said leading-in wires.

'20.'A filament mounting machine comprising a filament guide carrier provided with feed rollers, a pinion secured to one of said rollers to provide driving means there for, means for reciprocating said carrier, racks disposed at opposite sides of said pinion, an oscillatory member associated with said pinion and means 'for engaging said pinion with one of said racks during the reciprocation of said carrier.

21. A'filament mounting machine comprising a filament guide carrier provided With feed rollers,a pinion secured to one of said rollers to provide driving means therefor, means for reciprocating said carrier, racks disposed at opposite sides of said pinion, an oscillatory member associated with said pinion, means for engaging said pinion with one of sald racks during the reciprocation of said carrier, said carrier reciprocat- In testimony whereof, I have hereunto subscribed my name this 1st day of December 1922.

JOHN JOSEPH HIGGINS.

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