US2380742A

US2380742A - Lamp making apparatus

Info

Publication number: US2380742A
Application number: US426766A
Authority: US
Inventors: Jr John Flaws
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1942-01-14
Filing date: 1942-01-14
Publication date: 1945-07-31
Anticipated expiration: 1962-07-31

Description

y 1945. J. FLAWS, JR 2,380,74

LAMP MAKING APPARATUS Filed Jan. 14, 1942 e Sh e ets-Sheet 1 lnven'torz v Jon Flaws JT'.,

' His AT July 31, 1945, I J. FLAWS, JR 2,380,742 v LAMP MAKING APPARATQS Filed Jan. 14, 1942 6 Sheets-Sheet 2 40 45 44' T 45 I 46 4/3 d/a Inven'lror': Laws Jt,

His ATTOTTWEBH;

July 31,1945. J. l -"L AWS, JR 2,380, 4

LAMP MAKING APPARATUS Filed Jan. 14, 1942 e Sheets-Sheet 3 Invenbor John Flaws J11,

. His AHor-neg.

July 31., 1945. J. FLAws, JR 2,380,742 I LAMP MAKING APPARATUS Filed Jan. 14, 1942 L Fig.1?

6 Sheets-Sheet 4 Inven'for John Haws Jri,

WW His ATtovneg. 4

July 31, 1945. J. FLAWS, JR 2,380,742

' LAMP MAKING APPARATUS Filed Jan. 14, 1942 6 Sheets-Sheet 5 lnventor" John Flaws Jr.

Hls A'lr'tovneg a Shee ts-$heei e 5113;; 3945.. J. FLAws, JR

LAMP MAKING APPARATUS Filed Jan. 14, 1942 lnven tor: ohn Haws Jt,

His A'fiorneg.

' The apparatus is preierably used in combination with stem making'apparatmga carrier ior auto 45 paratus can, ii desired, be'located at various po- Another object or my'inventionis to. rovidc .apparatus ior the cathode "videsmcansois plvimafiuidtothe re il en ly 3.1, 1945 umrap sTA'rEs; -PATENT owner if I W543 hmmo maiwros .loiml'ia' n autonomous admits of New York Application smug; a. 1042, Serial No. moss co Claims. (Cl; so-zsss) My invention relates to apparatus ior making an electrode assembly or mount ior'fiuorescent lamps or other discharge lampsjand similarly constructed electric devices. still more particularly my invention relates tcapparatus ior automati- 5 callymountingafilamentu'ywirecathodeonthe leadsoiastemoiadiachargelampendtoapparatus ior constructing an anode on said stem at a predetermined relation to the cathode. Such cathodes may comprise a single coiled filament or a coiled-coil filament corresponding to the filaments oi incandescent lamps and the apps? ratus comprising the present invention correspondingly relates in part --to apparatus iormounting both cathodes and filaments.

One object ci-my invention is to provide apparatus ior mounting a cathode of a discharge lamp or the filament oi an incandescent lamp on theleadsoiastemorthelike.- Theapparatus comprises a novel. mechanism ior carrying the filament or. cathode between the ends oi the lead wiresandinserting theendsoi-thefilamentinto hooksonsaidleads. I

Another object oi my invention is to provide apparatus for bending hooks and otherwise shaplog intermediate portions-oi theleads in prew aration to mounting a cathode or filament there:

on. Such apparatus iorms two reverse bends in said leads veryeloae to'each other so-that hooks are formed therein, and during said operation holds said leads firmly above the stem so that said stem is not broken: The apparatus carries the cathode or filament between any longitudinal or lateral extending portions oi said leads to proper mounting relation thereto. s so Another object oi my invention is to provide apparatus io'r reshaping the leads oi a stem of a discharge device to provide for. the attachment oi the cathode thereto and then'iurther reshapa ing said leads toiorm auxiliary anodes. such apparatus providesdor the accurate and economical manuiacture r mounts or electrode I turesliorifiuorescent and other discharge lamps matically advancing the stem to a serieso! work s stations at which the apparatus of my invention is located and apparatus operating in .proper time relation with themovements oi the carrier ior actuating said apparatus. However, the apso sitions on a table and the stem or the like can be brought to said positions In either combination the cathode or filament canbe ied j into the apparatus either manually or automati- 5 ter the iormation oithe mount. Such apparatus proto coat saidcath'ode with a' material 'ivmca can be iormedinto on electron emissivc material after subsequent treatment, and the apparatus iurther includes means ior heat treating said cathode 'tobeconfinedtoaparticularportionoithe cathode morereadily than by other means. and

provides tor the thorough'mixing oi the fluid and uniform distribution theieoi through the coils oi the cathode: The current passed through the cathode heatsthe coating thereon causing it to be dried and, in-some instances, drives oi! the binder components of the fiuid which have. caused it to adhere to -the cathode. 1

other objects and advantages oi invention will appear irom the iollowing'detaileddescrip' tion oi a speciesoi my invention and irom the Inthedrawingam. iisa planviewoiapparatus comprising my invention in combination with a carrier for advancing a stem to the various portions thereoi at stations A to} inclusive and the means oisupporting both said apparatus and the carrier; Fig; 2 is a-'perspective view oi one head of the carrier with the completely iormed mount in posinon therein; Fig. 3 is a mound three perspective views of the mount in yarious stages oimanuiacture r'igai and oareplanand side views oi hook iorming apparatus located oi:

station A; F 6118 a perspective view oi the ieeier apptus at station B controlling the cathodeapparatus and the wiring v a k fox-1M8. 7 is a side elevation of the cathode iceding ond'mounting apparatus at station C; Fig. 715.

ion side elevation oi the strip guiding means oithecathode .i'eeding apparatus; Figrj is an end viewona largersca1eoiaportionoisaidcathode feeding appara s; Fig. 8A is a-perspective'vicw oi the transfer arm and actuating other associated mechanism 01 the cathode" reading apparatus; Fig.9 is aside elevation oi'the cathode positioning, transferring and hook closing mechganisms comprising the mounting at station-C; Fig. 9A is a perspective view oi one oi thefinge're or the hook closing mechanism;1"igs. wand 11 are side elevations at degrees to each other and on a larger scaleoi the cathode transierring mechanism oi said mounting lplm'atua;

and Fig. 11A is a perspective view thereoi; Fig.

. .12 is'a side elevation partially ingseci'zlonoi the cathode positioning transferring mecha'- nisms; Pigs. -l3and 14 are'planandsideviewsoi the anode iormingep mtus at-station E; Fig.

15 is aside elevationpartially in section oi the cathode coatingy paratus at station G; 16

e is a vertical sectionthrmzgh the dipper. oi'said apparatus along line i't-II ohms-15ml: a still/ larger scale; Fig. 17 is avertical section through the discharge conveyor. and

vanced into operative relation theretovby the indexing movements of the carrier 22. The stem 22 is held in one of a plurality of heads 24 (Fig. 2)-

asaoysa.

42 and 42 with aprojectin'g' ear 54in thereon.

' The lever 44 is connected to the dam-actuated meansthrough the link 41 and the rod 42 and,

.being operated by a part of the main driving means of the machine, causes the hook-forming apparatus to be operated at. the proper intervals with respect to; the movements of the carrier 22 and stem 22. Certain parts shown on the left,

hand side of Fig. 4 and Fig. 5 and, actuating jaw 26' correspond to those which are shown on the v right hand side of said flgures'and which actuate jaw 22. For the sake of conciseness, those parts of the carrier 22 which is essentially thatdisclosed in detail in my .PiiOr'Patent 1,907,532 of May 9, 193a, and which adv nces/said stem :2 along a circuitous path 22 some distance above the-table |2 tothe stations at which the present apparatus is located.. As disclosed in my said prior patent, the carrier 22 is preferably arranged so as to take the stems 22 directly from the stem making m chine and, in this particular'instance.

also advances the stem 22 to andfrom apparatus (not shown) located along tlie path 22 before bringing itinto operative relation to the appagratus of my present invention. The stem 22 at such times appears as at-a-in Fig. 3 and comprises an extremely short flare or. stem tube 22, an exhaust tube 21 and the leads 22 and 2|, which leads have mid-sections of a material of the same rate of expansion as the vitreous stem tube 22 and exhaust tube 21 and pass through the seal ioi'ning said stem tube 22 and said-exhaust tube. 21-. An opening in the seal between the inner 22 and 2|, which are bent so.-

ends of the lea as to be spaced er from each other, provides a passage throughthe stem 22 from .the exhaust tum 21- I As shown in Fig. 2, each head 24 of the carrier 22 engages and'h'olds the stem 22 by two sets of jaws 2222 and 222| which grip the exhaust tube 21 at two'spaced points andwhich are (although not shown)" supported and operated through the" hollow-shaft 2 2 and the shalt 22 therein. "Thebrack t u grips the hollow shaft 22 and forms one'o the links making up the endless belt structure of the carrier 22 which is indexed at regular intervals through the sucees sion of stations A to I inclusive.- 4

\ The'flrst of thesestations. station A-in particular, is occupied by apparatus for bending the leads-22 and 2| to theiorm shown at b in' Fig. 3

wherein laterally oflset open hooks a, intrywhich the ends of filamentary cathodecan be clamped, are formed in a mid-portion of said leads 22 and 2|. This apparatus, as shown in detail in Figs. 4 and 2, comprises duplicate mechanism at each operating on jaw 22' are designated by the same number, plus a prime, as the corresponding parts associated with jaw 22. v

At the time the Jaw said jaw 22 and slide. 21 are positioned by the engagement of the stop screw 42 (onthe arm 20 extending from theend thereof) with the end of the carriage 22 as the expansion force oi.

. the spring 2| which is located in a well in said slide 21 and which butts against a downwardly extending tongue 22 of the plate 22 keeps the slide 21 in an advanced position in its'ways. The

Jaws

22 and 22 are prevented from bending the leads 22 and 2| out ofposition by the stop'screws- 22 and 22' in the lower extremity of the arm 22 or 22' which engage the back, portion of the standard 42 when the

laws

22 and 22 have gripped said leads 22 and 2! and are at their limit a of motion. The motion of the carriage 22, however, does not stop at this time and slide 21 is moved back in its ways, causing the spring 2| to be compressed-still further'and the, die 24 (which is mountedon slide 22) to be carried against' lead 2|.

member 24 is pivoted-on the pin 22 carried by the slide 22 and turns about side of the path 22 of travel of the stem 22 and begins'its cycle of operation by advancing thehoriaontally disposed

Jaws

22 and 22? into engagement withthe leads 22 and 2| so that they are held'securely in place. Jaw 22 is fastened to a.

slide 21' located below the plate 22 in' ways in the carriage 22 and is carried into engagement with the leads "and 2| by the movements of the carriage 22 which is, in'turn, located in ways in the standard 49- and which is actuated indirectly by cam actuated means (not shown) said means corresponding to that shown in my Patent 1907;232. The carriage 22 is under the control of the arm 4| which'is pivoted on the pin 42 earried'bythe standard 42 and which is contosaidca'rrlageabythellnkfl'andthe- 44.whichis'alsopiveted on'the pin42 and which nected 7 said arm 4| to op rate aaa unit therewith through engagement of the: screws said pin 22 in' a 0100' Fig.5) as the lead 2| is bent up against the law 22 so that relatively no longitudinal strain is placed on said lead 2|. At other times the die 24 is turned about the pin 22 by its own weight so that the back portion rests against the stop 'screw 21'. The slide 22 is kept forward in its ways in the carriage 42 by the expansion force, of the spring 22 which is located in a well in said slide 22 and buttsagainst the downwardly extending tongue 22 of the plate 22 until it has completed its motion and the stop screw 22 on the arm 2| extending laterally of said slide 22 butts against the-arm 22 extending from the standard 42. At

other-times the slide 22 retains a ilxed position with relation to the carriage" because'of the engagement of the stop screw 22 with the back P rtion thereof. I v v v The reverse bend in lead 2| is produced by the movement in carriage 22' which corresponds to additional movement of "the carriage 22 ,and

which carries the roll 24 against the protruding end 22 of the lead 2| so that it-is bent back along the lower surface of the die 24. The correspondma reverse bend produced by the movements of carriage 22 bends the end'llof lead 22 andcauses said leads 22 and2| to appear as shown at b in "P18. 3'. the said leads 22 and 2| both-being simi- .larly shapedibut orientated with their hooks facing in opposite directions. The roll 24, as shown inl'igs. 4 and 5, is mounted on the pin 21 onthe. extending end of the lever 22 and is moved directly'by the carriage, 22' as the lever is pivotally mounted on the pin 22 ca rried by the hracket "on the side of said oarriagefll. The lever 22 ahmeebyuiespn cu andispositionedbythe a is moved as engage- ,ment with theleads 22 and 2| offthe-stem 22,

direction (as seen in.

stop screw I2 which engages the bracket I8 so that the roll 84 engages the lead 2| just below the end of the die 54 atthe beginning of the bending operation. The completion of this bending operation finds all portions of the hook-forming apparatus at their limits of operation, and the operating rod 48 changing its direction ofmovement so as to separate said apparatus from the leads 28 and 2|.

The stem 22 is now indexed from station A to station B, the next in order,,which is, in this particular instance, occupied by feeler apparatus which determines whether a cathode will be fed to the stem 22 when it is located at station C, the next in order. This apparatus prevents the loss of a cathode when there is no stem 22 in a head 24 of the carrier 23 and when the stem 22 is defective; that is, without one or both leads 28 and 2|. The apparatus comprises two pairs of resilient wires 13-18 and 14-44 which are moved ing apparatus is such that the cathode 88 is preup to the normal position of the

ends

85 and 86 of the leads 28 and 2|. The wires 'I3l3, 'I4'I4' are mounted on a block 15 of insulating material attached to the arm I6 and arecarried to position by a movement of the arm I8 which turns it about the pin 11 extending from a stationary part 18 of the apparatus and which is under the direction of rod 18. The bracket I8 is mounted on the table I8 (Fig. l). Normally, each pair of wires I3I3' and 14-14 contact separate end "

portions

85 and 68 Of the leads 28 and 2| respectively and an electrical circuit be-- between either-pair of said wires, said cathode feeding apparatus is suitably aifected.

The succeeding indexing movement of the carrier 23 advances the stem 22 to station C where the stem 22 is provided with the cathode or filament 88, as shown at c inFig. 3. The cathode 88 is fed automatically by one portion of the apparatus and is positioned with its ends within the open hooks of the leads 28 and 2| and attached thereto by another portion of said apparatus. The feeding apparatus may be dispensed with, as the cathodes 88 can be placed in th mounting apparatus manually, but is preferably used in this combination in that higher speeds of operation are. then permissible and the danger of 11111113 andco'ntamination of the cathode 88 are greatly lessened. The feeding apparatus shown is a modification of the lamp filament feeding apparatus disclosed in my application Serial No. 240,779, filed November 16, 1938, now Patent No. 2,280,573, and provides a flexible metal strip or belt 8| (Fig. 7) having a plurality of pockets 82 in which the cathodes 88 are held. The metal strip 8| provides a very convenient and satisfactory means of handling considerable members of cathodes 88 at one time in that it can be wound into a self contained roll and can \be unwound so as to present the cathodes 88 when they are needed. In this instance the cathodes or filaments 88 are comprised of very fine tungsten wire in'the form of a coiled-coil from end to end, but they may have a coiled-coil mid-portion with either straight or single-coiled end sections, or they may be still differently shaped. The said filaments are located completely within the pockets 82 in the metal'strip 8| so asto be protected thereby. The course of movements of the feedsented at station X during the movement of the metalstrip 8| from spool 83 to spool 84 and is carried from station X to the mounting apparatus located about station C by the transfer means 85 which is also a part of the feeding apparatus. The cathode 88 is received by the transfer mechanism 88 of the mounting apparatus which is located below the stem 22 at station C and is carried up into the hooks 85 and into mounting relation to said stem 22 by the movements of said transfer mechanism 88.

The cathode feeding apparatus which includes both the means of unwinding the strip 8| and the first transfer means 85 provides, as shown among Figs. 1, 7, 7A and 8, a spool for holding the rolled strip 8|; guide means including the top and bottom guide plates Bland 81' respectively; the

rolls

88 and 88 and the channel 88 in the standard 8|; a feed roll 82 for advancing the strip 8|; and the spool 84 for rolling up the strip 8| after the cathodes 88 are taken from it. The strip 8| is advanced intermittently so as to present a pocket 82. (Fig. 8) containing a cathode '88 at station X at the proper moment by rotation of the feed roll 82 which is fastened on the on the end of shaft 88' is moved up and down by the main driving means (not shown) of the machine and the pawl I88 which is mounted on the stud I8I extending from arm 88 is caused to advance the ratchet wheel 8'I one tooth, thereby moving another pocket 82 to station X. The

pawl I88 is kept against the ratchet wheel 81 by the contraction of the spring I82 extending between a post in pawl I88 and a second pawl I83 which is pivoted on stud I84 and which prevents the ratchet wheel 81 from turning in a reverse direction. In this particular instance, asecond sealing strip I85 is used to seal the cathodes 88 in the pockets 82 of the first strip 8| and is withdrawn from the spool 88 with said strip 8|. The sealing strip I85 is separated from the metal strip 8| as the latter passes over roll 88 and passes around. roll 88 to the spool I88 which winds up the excess. Roll 88 (Fig. 7A) is mounted on the pin I81 carried by the bracket I88 which forms the

guide plates

81 and 81" and which is pivoted on the pin I88 supporting roll 88. The spools 84 and I88, which roll up the used strips 8| and I85 respectively, are mounted on the shafts H8 and III respectively which are held by the standard 8| .and thearm II2 extending therefrom and are rotated by means of the belts H8 and H4 which engage the pulley ('5 on shaft 83 and the pulleys H8 and III on said shafts H8 and III respectively.

The above described portion of the cathode feeding apparatus is preferred when the cathodes 88 are fed entirely automatically, but is preferbeforethey are advanced to station X. It is preferred that thestrip 8| be endless and extend around the feed roll 82, the spool 84' and the idler sheave 88' in order to make the operation of the apparatus continuous, but it is possible to "in Figs. 7 and 9.

from spool 83 to spool 84 if said strip 8| is rewound on spool 83 at intervals. The idler sheave 88' causes a greater length of the strip 8I to be accessible than in the entirely automatic apparatus.

The operation of carrying the cathode 88 from the pocket 82 of the strip 8i at station X, which is provided for by the transfer means 85, is performed by the various movements of the arm II8 which is lowered so that the suction nozzle H8 in -the end thereof is' directly over said cathode 88. The arm IIB (Figs. 1, land 8) is comprised of two pieces, .(as best seen in Fig. 8A), a straight piece I28 which is pivoted on the pin I2I and which is located in a central opening in the carriage I22 and a transversely extending L-shaped piece I23 which is attached to the end of part I28 and which has the suction nozzle I I9'on one end and a roller E28 within the channel I25 of cam I26 (shown. in dotdash lines in Fig. '7) on the other end. The movement of arm II8 which carries it into operative relation to the cathode 88 is the result of a movement of the carriage I22 (Figs. 7 and 8) in the ways formed by ball bearings I21 and the stand ard 9|.

in cam I26. This movement is the final backward movement of the piston I28 which is connected to the carriage I22 through the rod I29, link I38, pin I3I, arm I32 and pin I33 and is due to the flow of air into the cylinder I34 through a pipe connection I35, the air fiow being under the control of a valve (not shown). screw I3I' (Figsfll and 8) which is supported by the carriage I22 and which engages an end of the pin I3I extending from arm I32 and a corresponding screw' (not shown) on the opposite side of said pin I3l prevent any rotative motion of arm I32 about pin I33 but allow the relative position of the piston I28 and carriage I22 to be changed. The carriage I22 moves to the extent allowed by the nuts I36 on the rod I31 extending from the end thereof, which nuts I36 engage a portion of the standard 9|. The suction lifting the cathode 88 into the nozzle II8 is preventedfrom disturbing the cathodes 88in the succeeding pockets 82 of the strip 8| by theplate I38 which is attached to the adjacent edge of the standard 9| and is conducted to saidnozzle II9 through passages in the end of the arm II8 which are connected to a source of vacuum through the pipe I39 and flexible hose I48. The suction continues during the following movements of the arm H8 which raise the cathode 88 above the strip 8I and then advance it to a position over the transfer mechanism 86 of the mounting apparatus which is thenlocated at a lower position (see Figs.l and 12) than shown These latter movements of the arm IIB are caused by a manipulation of valves (not shown) which control the entrance and discharge of air from cylinder I34 and which are actuated by cams of the operating means (not shown) so that compressed air flows in pipe connection I4I (Fig. '7) and is discharged from pipe connection I35. At the limit of the transferring movement of arm I I8 the roller-J24 enters a second declined portion of the channel. I25 in the cam I26 which causes the nozzle 8 to be lowered to a position directly over the transfer mechanism 86 (Figs. '7 and of the mounting apparatus and the valve controlling the suction thereto is adjusted so that the cathode" is This movement carries the roller I24 into the declined end section of the channel I use a relatively long length of strip 8| feeding, released and drops into said transfer mechanism 86. The nuts I42 on. the rod I31 engage the extending end of the standard 8| when the nozzle I I9 is properly positioned and stop further movement thereof. The operation of transferring the cathode 88 is complete with the disposition of the cathode 88 in the transfer mechanism 86, but the cycle of operation is not complete until the nozzle H8 is returned to its former position so as to prevent said apparatus from interfering with the operations of the mounting machine. This final action of the transfer means 85 is caused by an adjustment of the valves controlling the flow of air to the cylinder I38 which reverses the fiow of air thereto so that the piston I28 and transfer nozzle I I8 is moved back.

At the time the cathode 88 is released by the feeding apparatus, the transfer nozzle H9 there- 7 of is directly over the transfer mechanism 86 as The shown in Fig. 10 and said mechanism 86-which is both lowered 'and rotated approximately 100 degrees from its position in Fig. 7is arranged so that the ends of said cathode 88 pass between jaws I43I44 and I48-I48 respectively (Figs.

I0, 11A and 11) and the cathode comes to rest on the projecting portions I45 and I45 of jaws Hi8 and I44 respectively. Said jaws I48-I44 and I43' I44' engage the cathode 88 at spaced intermediate points and remain in this position during the immediate interval in which said cathode 88 is positioned therein.

The present operation of the apparatus is the result of a closing movement of the fingers I46 and I46 which carries the ends of the inserts I41 and I41 against the'ends of the cathode 88 and the jaws I43I44 and I43'--I44' respectively. The fingers I46 and I46 are pivoted on thepins I48 and I48 which extend from the standard I49 and are moved from their rest position which is determined by the stop screws I58 and I58 on the brackets on the standard I49 'by a downward movement of the cam I5I which engages the rollers I52 and I52 on the lower ends of said fingers I46 and I46. The contraction of the springs I53 and I53 keeps the fingers I46 and I46 turned so that the rollers I52 and I52 are in engagement with the faces I54 and I54 of the cam I5I which is mounted on the slide I55 in the ways of standard I48 and which is operated through the rod I56 and the main driving means (not shown) of the machine. The funnel-like openings in the ends of the inserts I41 and I41 (Fig. 12) direct the ends of the cathode 88 into the deeper wells I51 therein which have a depth determined by the positions of the screws I58 whereby said cathode 88 is compressed to a definite length at the limits of movement of said fingers I46 and I46. Slight variations in the cathode 88 can not, therefore, cause said cathode 88 to be mounted improperly or have any appreciable effect in the complete mount or electrode assembly.

The movement of the fingers I46 and I46 is also used, in this particular instance, to actujaws I43, I44, I43 and I44 into engagement with the portions of the cathode 80 which they must hold during the mounting operation and turns said jaws about the pins I6I and 162. Opposite jaws I43-I44 and I44-I43' of each pair have overlapping portions I63 (Figs. 10 and 11) pivoted on the pins iii and I82 which are mounted on the yokes I64 and I64 which are, in turn, pivotally mounted on the pin I65 held by the upper end of the spindle I66. The yokes I64 and I64 engage said pin I65 through the arms there-. of which are offset from each other, as shown in Fig. 12, and extend upward in back of portions of the jaws I43I44 and I44--I43, as shown in Fig. 10. At the time the cathode 60 is fed ated by the entrance of compressed air into the cylinders I85 and I86 (Fig. '1). The spindle I66 is directly connected to the piston in cylinder I85-which is attached to the standard I49 and is caused to be raised to the position shown (Fig.

'7), prior to being turned, by the adjustment of.

' I44 and I 43'-I44 over the relatively long subinto the transfer mechanism 86, the jaws I44 and 2o andI43 (and correspondingly I43 or I44) are swung outward to the limit established by the Y nuts I61on pin I68 carried by a portion of the yoke I64 by the expansion of the springs I69 which buttagainst the jaw and said portion of the yoke I64. A spring I10 extending between the pins -I-1 l and HI, which are s'lidably mountis dropped into the mechanism, the cams I12 and I12 are turned so that the thicker curved portion is between the yokes I64 and I64, tipping them about the pin I65 and holding the jaws I43-I44 and I43'I44 open.

After the cathode 80 is positioned and compressed and the jaws I48I44 and I43'I44 are moved closer together, said jaws are caused to grip said cathode 80. This latter operation is produced by an upward movement of the finger I 14 (Fig. 7) which engages the post I15 of the arm I 16 extending from cam I12 and turns said arm I16 so that the flat portions of the cams I12 and I12 are carried between the yokes I64 and I64. The finger I14 is attached to a block I11 clamped onto the rod I18 which is held by the cylinder I19 and a piston (not shown) therein, and is actuated by the movement of the piston by the passage of compressed air to and from said stantially horizontal ends 65 and 66 of the leads 20 and 2| and turns the cathode 80 approximately 100 degrees so that said ends are disposed within the open hooks 35 of said leads 20 and 2|. This turning movement is caused by an adjustment to another valve (not shown), a part of the main driving means of the machine, which valve causes the air to enter and leave cylinder I86 through pipeconnections I89 and I90, thereby changing the position of a piston (not shown) in said cylinder I86. The piston, in turn, is con-' nected through rod I9I (Fig. 1), universal joint I92, link I93 and bolt I94 to the arm I95 on the spindle I66. 4

The next operation of the mounting apparatus 86 at station'C is the clamping of the open hooks 35 onto the ends of the cathode 80 and the bending of the free end of the leads 20 and 2| .to-a horizontal position. The apparatus performing these operations consists of cooperating dupli-e cate mechanisms I96 and I96 (Fig. 9) at opposite sides of the stem 22 and includes the clamping jawsv I91-I98 and I91--I98' which are at the start of a cycleoi' operations located in a re tracted position so that they are spaced from the closed end of the hooks 95. The clamping jaws I91 and I98 of clamping mechanism I96 are pivotally mounted on the pin I99 held by the cam 200 and a plate (not shown in Fig. 9) corresponding to plate 20I' of the opposite clamping mechanism I96 and are carried into operative relation to the hook 35 by movement of the arm 202 to which said earn 200 and plate 20I (Fig. l) are cylinder I19 through the pipe connections I90 I and I8I at the direction of a valve (not shown) actuated by the main driving means of themachine. The rod I18 and finger I14 are kept from turning by the roller I82 on the block I83'clamped to the lower portion of said rod I18 which roller I62 is located, in a vertical slot in the upper port on of the bracket I84 supporting the cylinder I19. 4

When the cathode 89 is gripp d by the jaws I43I44 and I43--I44, the positioning fingers I46 and I46 are moved back away from said jaws and the cooperating pairs thereof separate to the thereby placing said cathode under tension.

This operation may stretch the cathode 80 some extent allowed by the nuts I61 on the pins I88,

attached. The arm 202 is pivoted on the pin 203 and, being biased by the spring 204, is caused to swing toward the stem 22 with thefirst entrance.

of compressed air behind the piston 206 in the cylinder 208 of the operating means of said mechanism, which compressed air is, as in the other instances. controlled by a valve (not shown) which is actuated by a part of the main driving means of the machine. The air is introduced into cylinder 206 through pipe connection 201 which is connected to the source of compressed air (and correspondingly into cylinder operative relation to the hooks 35. The corresponding movement of the rod 208', bar 209 and arm 202' carry the finger 2I3 (Figs. 9 and 9A) against the portion of the lead 20 adjacent the open hook 35 so that it can not be displaced by the subsequent operations or the apparatus. The continued movement of the bar 200 which is connected to the jaws I91 and I98 through the links 2E4 and 2l5 carries the roller 2|0 further in the opening 2 in cam 200 and closes said jaws I91 and I98. This same operation also carries the finger 2|6 attached to the jaw I98 into engagement with the-extending end of lead 20 bending it up against the head of .the stop screw 2H mounted on the finger 2l3. The jaws I91 and I98 and other corresponding parts of mechanism I96 operate similarly. The apparatus is separated from the stem 22 and returned to its original position by the entrance of compressed air into the cylinders 206 and 206' through pipe 86 then moves down and turns back to its orig-\ inal position by a reversal of the compressed air -fiow intocylinders M5 and H36, completing its cycle of operation. At such times, the cathode 8|] is securely attached to the leads 20 and 2| of the stem 22 as shown at c in Fig. 3 and is. under slight tension, although. it may have lengthened when the hooks 35 were closed on the coiled endportions thereof. Very short end sections of the cathode 80 may extend beyond the closed hooks 35.

The cathode feeding and mounting apparatus '85 and-35 respectively are under the control of the feeler apparatus at station B in that said feeler apparatus prevents the feeding apparatus from advancing a cathode 80 if the stem 22 at station B is defective. This control prevents the metal strip 9! from being indexed in the cycle of operationsv which would ordinarily cause a cathode 80 to be mounted on the defective stem 22 when it is advanced to station C although all other parts of the feeding apparatus 95 and the mounting apparatus 86 continue-to operate as described. In instances when a defective stem 22 is engaged by the feeler apparat s,'the circuit through it is incomplete, as already (1 scribed, and the solenoid 22i (Figs. 6 and '7) remains unenergizedand inoperative so that the lever 222 (Fig.

stems can be kept to a minimum by the use or such apparatus.

The next station (E) into which the head 24 of the carrier and the stem 22 are indexed is occupied by the apparatus 228, shown in detail in Figs. 13 and 14, which bends substantially the entire end .

portions

65 and 85 of the leads 20 and iii to positions parallel to but on opposite sides of 'the cathode 89 (Fig. 2). These

end portions

65 and 66 of the leads 20 and 2| function as auxiliary anodes in the compieteddiscliarge device and are not engaged by the apparatus 228 until it is moved up from below the stem 22 to operative relation therewith by a corresponding movement of the bracket 229. All essential members of the apparatus 228 are mounted on the bracket 229 which extends from a portion 230 located within slide ways in the standard 23| and are positioned by a movement thereof which is under the control of the bar 232. The said'standard 23| is mounted on the table l9.

At the beginning of the cycle of operation the downward pull of the bar'232 which is attached to the main driving means (not shown) oi! the machine holds the slide 233 down in its ways in the bracket 229 so that the plate cam 234 on the outer face of the slide 233 butts against the cover plate 235 over said ways and the lifting force of the lever 236 which engages the roller 231 carried by said bracket'229 is ineffective. The lever 233 is pivoted on the pin 238 extending from the standard m and is under the influen'ce or the contraction force of spring 239. The apparatus is located in operative relation to the leads 29 and 2| and the stem 22 when the bar232 has moved sufliciently to allow the lever 233 to slide the bracket 229 upward in its ways in standard 231 to the limit allowed by the nuts :40 on the stud 2 extending from the top surface or the table at which time the die 242 which is attached to bracket 229 is located between the end portions 65 and 33 of the leads 29 and 2|. The die 242 comprises two similar separated portions 243 and-;2 43' which are located on opposite sidesof the cathode 89 and does not disturb the position of the leads 20 and 2|.

Further operations of the bending apparatus 4 223 are brought about by the additional upward 7) which is connected to the armature 223 thereof is moved by the contraction iorce .of the spring 224. This operation turns lever 222 about the pin 225 extending from the standard 9| and causes the. roller 223 to engage and turn the pawl 109 so that it does not engage and turn the ratchet wheel 91 when the arm 99 is moved. In this manner, the feed roll 92 is preventedfrom turning for the immediate cycle of operation. At other times when the stem 22 engaged by the ieeler apparatus is properl constructed, the-armature 223 of the solenoid 22| lifts the end of the lever 222 from the stop screw 221 extending from the post on standard 9| to the positidn shown so that the apparatus operates as previously described.

The'next indexing movement oi. the head 24 of the carrier advances the stem' 22 to station D. This station is. shown unoccupied but canbe occupied, for instance, by test apparatus of the general type disclosed in Donovan Patent 2,053,137, which is assigned to the assignee oi? the present invention, so that any failure of the mountins apparatus at station C can be known immediately. The number of deiectively manufactured movement of the slide 233 which,-flrst, causes the jaws 244 and 244' to move into engagement with .the portions 35 and 33 of the leads 29 and 2| ad- .iacent to and comprising the hooks "and which, second, causes the rolls 245 and 245' to bend the extending portions back against the outer faces of the separated portions 243 and 243' of the die 242. ,The

laws

244 and 244! are pivotally mount-' ed on

pins

243 and 243'. respectively held by the bracket 229 and are biased by the springs 24'! and 241" which extend from posts 243 and 243' held by bracket 229 so as to be under the control of the movements or the

studs

249 and 249 which areengaged through the screws 253'and 253' respectively. The rolls 2"- and 245' and the studs 249 and 243' respectively are both mounted on slides "I and 25! located within horizontal ways in the bracket 229 and are actuated by the movements of said slides "I and 2H which are created by movements of levers 252 and 252' about the studs 253 and 253'. As shown in Fig. 14, the lever 252 engages a block 254 on a pin 255 extending through a cover plate 253 over the slide 25| and is actuated'by the movement of the slide 233 as'the roller 251 on the pin 253 in the lower end'oi' theleyer 252 is then carried into a dinerent part of the slot 253 in the cam plate 234.

extending

portions

65 and 66 thereof against the separated portions 243 and 243' of the die 242 so as to prevent them' from moving out of place. The openings between the two portions of the faces of the jaws 244 and 244' prevent said jaws from disturbing the ends of the cathode 30 extending beyond the hooks 35. The movement of the rolls 245 and 246' carries the-peripherally grooved portions thereof against the extending ends 65 and 66 or the leads 26 and 2| bending them back around the corner of the separate portions 243 and 243' of the die 242 to a position Parallel to the cathode 60. The groove 260 in the roll 245 and the corresponding groove in roll 245' prevents the ends of theleads and 2| from shifting vertically from the plane of the cathode 80 even though said rolls 24I'and 245' only move to a position Just beyond the corners of the die 242. The anode shaping apparatus 224 is separated from the now completely formed cathode-anode assembly or mount by a downward movement of the slide 233 which movement causes the apparatus to operate in the reverse order and finally carries the cam plate 234 against the cover plate 236 causing allof said apparatus to be lowered away from said assembly.

It is sometimes desi able to rearrange the apparatus at the various stations so that the end portions of the leads 20 and 2| are first bent upward as atstation A and then, before the cathode or filament 80 is secured thereto, are

anodes. The above arrangement is preferred when the stem is advanced to the various independent apparatus manually and when the cathode or filament 80 is presented manually. The

stem 22 is, in the above instances, supported with relation to the various independent apparatus by separate holders having a fixed relation to the apparatus.

An indexing movement of the carrier 23 now advances the stem 22 to station F which isan idle station in this particular instance. After a period of time the succeeding indexing movement of the carrier advances the stem 22 to station G. the next in order. At this station (G),

.again bent as at station E to form the auxiliary the cathode 30 is coated with a fluid which after functions as a binding medium to hold said powders on said cathode 80 and is carried upward to the cathode from the cup 26| (Fig. 15) holding the main supply by the corresponding movement of the dipper 262. The cup 26| is supported. through the post 263. on its lower end which is held-by the bracket 264 mounted on the top of the table It and remains stationary at all times whereas the dipper 242 is mounted on the verticalllgispgged shaft 263'through the arm 266 and rod 261 and' is moved vertically, both to agitate the fluid in said cup 2" and to lift 'it'up to the cathode 30. The actuating means for the aaeaua 7 A The lever 262' is similarly actuated by-a corredipper 262 comprises apparatus (not shown), a portion of the main operating means of the machine, and the rod 263 and arm 269 which move shaft 266 vertically in the bracket 264. As shown in Fig. 15 and on a larger scale in Fig. 16, the.

dipper 262 has anopening 213 in the bottom which allows the fluid to circulate freely through it during an interval during which it is agitated repeatedly up and down in the cup 26| and which allows the fiuid to drain back into said cup 26! when it is raised into operative relation to the cathode 80. Both'operations contribute to the thorough agitation of the fluid and the complete replacement of the fluid within the dipper 262 and the trough 21] in the top edge of the partition 212 within said dipper 262 which trough 21| is carried up about the mid-portion of the oath ode 30 by the movements of said dipper 262. The trough 21| holds a suflicientl y large quantity of thefiuid to coat the cathode 80 although its ends are open and allow a good portion of the fluid to flow back into the dipper 262. is alsoproportionedso that the cathode 80 contacts the fluid which is drawn into the interstices. of the cathode by capillary attraction. The center portion of the partition 212 which forms the trough 2" has a length limiting the application of the fluid to the portion of the cathode 60 between the leads 20 and 2| and so prevents the fiuid from collecting on said leads 20 and 2| and the immediate portions of said cathode 80. Various means are provided for controlling the thickness of the coating given the cathode themost important are the size and shape of the trough 211, the period of time the cathode 80 is kept in said trough and the viscosity of the fluid. In certain instances a second and even a third coating may be placed on said cathode 80 at succeeding stations in asimilar manner if desired. Provision is made in the bottle 213 and the connecting passage 214 for replenishing the fluid as rapidly as it is used. The spring clip 215 and the bracket 216 hold the bottle 213 in place.

The coating apparatus just described is not claimed specifically herein but is claimed in a divisional application, Serial No. 488,955 filed May 29, 1943, now Patent No. 2,363,055, issued November 21, 1944.

The stem 22 is taken from the carrier 23 following two successive indexing movements thereof which advance it first to station H and then to station -I. At the latter station, a head 211 of the discharge conveyor 218 is carried over toa position below flange of the stem 22 by a movement of the entire conveyor 218 in the direction indicated and said stem 22 is released by the carrier 23'so that it drops onto said head 211 and is moved back with thereturn movement of said conveyor 21.8. The heads 211 of the conveyor 218 are located at regular intervals along an endless chain 219 which extends between the sprockets 230 and 2B| at the opposite extremities of said conveyor 218. As shown in Figs. 1 and 17,

the said heads 211 comprise holders 282 having ,a central opening in which the main body of the stem 22 is accommodated and spring clips 263 which engage and hold the upper end of the exhaust tube 21. Both portions of the head 211 move as a unit as the'spring clips 283 are mount- .ed on a bar 264 attached to the holder 282 which is, in turn, fastened to the chain 213. The conveyor 218 is actuated by means (not shown), a part of the main driving means, which means engages the

sprockets

280 and 26| and causes said chain 213 and the heads 211 to be indexed The trough 21| in a clockwise direction (Fig. 1) during the retracting motion of said conveyor 218. The indexing motion advances the stem 22 gradually along the entire length of the far side of the conveyor 218 during which the coating on the oathode 88 is allowed to dry and finally carries said electrode assembly into operative relation to apparatus 285 which passes electricenergy through said cathode 88 causing said coating to dry more rapidly and to be conditioned. The conveyor 218 is comparatively long (several times longer than shown) and the coating on the cathode 88 may have dried sufliciently so that this latter apparatus may be dispensed with in certain instances. In the course of the movement, the holders 282 slide along the top edges of bars (like those shown at 288 and 281) which are located on opposite sides of both straight portions of the conveyor chain 219 and which keep said holders 282 and the mount or electrode assembly to a definite path of movement.

The cathode treating apparatus 285 as shown in Figs. 1, 1'7 and 18 comprises ,an endless chain 288 having heads'289 at intervals corresponding to those at which the heads 211 on the conveyor 218 are located and two sprockets 298 and 29I at the opposite extremities which cause the chain 288 and a number of said heads 289 to lie directly opposite a portion of said conveyor 218. The sprockets 298. and 29| aremounted on a portion (not shown) of the conveyor 218 so as to move back and forth therewith and are indexed in the same manner as said conveyor 218 by the intermeshing gears 292 and 293 on the shafts holding sprockets 28I and 29! respectively so that the heads 289 of the treating apparatus 285 are caused to engage and travel with the heads 211 of said conveyor 218. As the conveyor heads 211 apparatus 285 contact the leads 28 and 2| making the necessary electrical connections thereto and the electrical energy conducted to said

spring fingers

294 and 298 from the

stationary bus bars

298 and 291. through the

brushes

298 and 299 and the metal bands 388 and 38| respectively causes the cathode 88 to increase in temperature. A block 382 of heat resisting insulating-material attached to the metal arm 383 extending from the holderdaz keeps the mount or electrode assembly from being broken or swung out of position. An insulating block 388 mounted on a plate 385 which is attached directly to the chain 288 provides-the means of supporting the

spring fingers

294 and 298 and the

brushes

298 and 299 and provides an opening into which the mount or electrode assembly allowing it to travel on with the conveyor 218 to a portion between the apparatus 288 and table i9, not shown, opposite which an operator-is stationed who removes and inspects the now complete mount.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. The method of forming a composite electrode for an electric discharge device which com" prises sealing a pair of leading-in wires into a glass stem, forming the inner portions oi. said wires with opposed filamentary coil-engaging hooks at a point removed from the innermost end of the wire so as to provide a free inner extension, clamping a filamentary coil within said hooks, and shaping said free inner extension to provide a wire anode element for said filmentary coil extending closely adjacent thereto and in the general direction thereof.

2. The method of forming a composite electrode for an electric dischargedevice which comprises sealing a pair of leading-in wires into a glass stem, forming the inner portions of said wires with oppositely facing opposed filamentary coil-engaging hooks at points removed from the innermost ends of said wires so as to provide free inner extensions, clamping a filamentary coil within said hooks, and shaping said iree inner extensions to provide a pair of wire anode elements for said filamentary coil disposed on opposite sides thereof and extending closely adjacent and in the general direction of said coil.

3. The method of forming a composite electrode .for electric discharge devices which comsaid hooks thereon, and then bending the said.

free ends of said wires 50 that they extend'along opposite sides of said coil approximately in the same plane therewith.

4. The method of forming a composite electrode for electric discharge devices which co'mprises sealing a pair of leading-in wires into r glass stem so-that said wires extend in the e general direction, bending intermediate portions of said'wires to form hooks which open in opposite directions so that the free end portions of said wires extend in oppositedirections approximately normal to the planepassing through said the pin 388 on an arm 883 passes as the heads I 211 and 289 are brought into alignment with each other so as to keep them in proper registration with eachother. Other parts of the conveyor head 289 comprises the'bracket 381 and the roller 388, the latter of which bears against the plate 299. Other parts of the treating apparatus 285' comprise the'bars 318 and 3 which are located along the-parallel portions of the chain 288 and -which provide a rest along which the plates 38! slide. The apparatus 289 further comprises the insulating block 3l2 and arm 3l3- which hold the bus bars 298 and 291m place. The interval of treatment by the apparatus 285 is relatively short and the heads 289 soon move away irom leading-in wires, placing a cathode coil in the space between said free wire end portions and then rotating said coil so that its ends enter said hooks, clamping said hooks on said coil ends, and then bending the said free ends of said wires so that they extend along opposite sides of said coil approximately in the same plane therewith.

5. Apparatus for mounting a fiiamenton end portions of spaced leads extending from a stem, comprising means for supporting said stem, filament transfer mechanism in alignment with said stem holder adapted to grip a filament with its ends projecting outward therefrom out of alignment with the said end portions of the leads,

.and means for actuating said transfer mechanism to first carry said filament to a position ad- Jacent to and between said lead portions and to then bodily rotate said filament about a point intermediate its ends to carry its end portions into mounting relation to said portions oi' leads.

tending leads provided with open hooks facing in opposite directions laterally of said stem,'fila-' assansl the ment transfer mechanism in" axial alignment with;

said stem but spaced therefrom and arranged to hold a filament with its ends out of alignment with the hooks in said leads, and means for ac-- tuating said transfer mechanism to first; carry said ends of said filament into the transverse plane of said hooks and then rotate said filament to carry the said ends into the open books.

,7. Apparatus for mounting a filament onend portions of spaced leads extending from a stem,

comprising'means for supporting said stem, filament transfer mechanism in alignment with said stem holder comprising two spaced pairs of jaws adapted to grip a linear coiled filament with its ends projecting outward therefrom out of alignment with the end portions of the leads, means for spreading said pairs of jaws apart to stretch the portion of the filament held therebetween, means for actuating said transfer mechanism to first carry said filamentinto the 5 transverse plane of said end portions of said leads and then to rotate said filament about a point intermediate its ends to carry 'said ends into'mounting relation to said end portions of said leads and apparatus for securing the ends of the filament to said leads so thatit is mounted in a stretched condition.

8. Apparatus formountinga filament on end portions of spaced leads extending from a stem,

comprising means for supporting said stem, filament transfer mechanism in alignment with said stem holder adapted to grip a filament with its ends projecting outward therefrom out of alignmentwith the said end portions of the leads,

apparatus for automatically presenting a fiia ment ata station adjacent said transfer mechanism, means for carrying the filament from said station to the transfer mechanism, and means for actuating said transfer mechanism to first carry said filament to a position adjacent to and between said lead portions and to then bodily roftate saidfilament about a point intermediate its.

ends to carry its end portions into mounting re-v lation to said portions ,of the leads. r

9. A machine for making mounts for electric lamps comprising the combination of a plurality of heads each adapted to support a stem having a pair of spaced leads extending therefrom in the same general direction, a carrier'supporting said heads and arranged to index the heads into a plurality of stations, mechanism located adjaheads into a plurality of stations, mechanism 10- cated adjacent the path of travel of said heads fgr bending said leads laterally outward and forming hook portions at points a substantial distance from their free ends, mechanism adjacent the path of travel of said heads for. carrying a filament to a position between the said leads withthe ends of the filament located in the hook portions, mechanism for clamping said hook portions of the leads on the filament ends, and mechanism also located adjacent the path of travel of said heads for further bending the leads, at

points between their free ends and the points of attachment of the filament, to a position such that the extremities of the leads extends inthe same generaldirection as the filament:

11. A machine for making mounts for electric lamps comprising the combination of a plurality of heads each adapted to support a stem having a pair of spaced leads extending therefrom in the same general direction, a carrier supporting said heads and arranged to index the heads into a plurality of stations, mechanism located adjacent the path of travel of said heads for bending said leads laterally outward and forming laterally oifset hook portions at points a substantial distance from their free ends 'with the hooks and the ends of the leads facing and extending in opposite directions laterally of the plane passing through the unbent portions of the leads, mechanism adjacent the path of travel of adjacent the path of travel of said heads for further bending the leads, at points between their free ends and the points of attachment of the filament, to a position such that the extremities of the leads extend on opposite side of and in the same general direction as the filament. 12. A machine for making mounts for electric lamps comprising the combination ofa plurality of heads each adapted to support a stem, having leads extending axially therefrom in a plane passing through the axis of the stem a carrier supporting said'heads and arranged to index the heads into a plurality of stations, mechanism located adjacent the pathof travel of said heads for bending said leads to form hook portions facing in opposite directions laterally of the said plane of the leads, mechanism adjacent the path of travel of said heads for carrying a filament to nism adjacent the path of travel of said heads for carrying afilament to a position between the said leads with the ends of the filament located at the bends in the leads, mechanism for securing the filament ends to the leads at the said ament, to a position such that the extremities of theleads extend in theisame general direction as the filament.

10. A machine for making mounts for electric lamps comprising the combination of a plurality of heads each adapted to support a stem a position between the said leads with the ends of the filament, located in the hook portions, and mechanism for. clamping said hook portions on the filament ends.

13. A machine for making mounts for electric lamps comprising the combination of a plurality of heads each adapted to support a stem having leads extending axially therefrom in a plane passing through the axis of thestem, a carrier supporting said heads and arranged to index the heads into a plurality of stations, mechanism located adjacent the path of travel of said heads for bending said leads to form hook portions facing in opposite directions laterally of the said plane of the leads, mechanism adjacent the path of travel of said heads for carrying a filament to a position between the said leads with the filament located in a plane passing through the hook portions of the leads transversely of the axis of the said stem and with the filament at an angle to the line joining said hook portions, said lastnamed mechanism being arranged to further bodily rotate the filament in said last-named plane to carry the ends of the filament into the said hook portions, and mechanism for clamping said hook portions on the filament ends.

14. The combination set forth in'claim 9 where-- of jaws arranged to grip an intermediate portion of said lead wire, a finger member at the opposite side of said jaws from the stem support means, means to move said finger member laterally of and through the position occupied by the end portion of the lead wire extending beyond said jaws to bend said wire laterally, and another forming member located in opposed relation to said finger member and adapted to bend said end portion of the wire back around said finger member to form a laterally oilset hook opening in a, direction normal to the unbent portion of the wire.

16. In apparatus for making mounts for electric lamps and similar devices, support means for a stem having a lead wire extending therefrom, and hock-forming mechanism comprising a pair of jaws arranged to grip an intermediate portion of said lead wire, a finger member at the oppositeside of said jaws from the stem support means, means to move said finger member laterally of and through the position occupied by the end portion of the lead wire extending beyond said jaws to bend said wire laterally, and another forming member located in opposed relation to said finger member, and means for moving said forming member in a direction opposite to the movement of said finger member to bend the wire back around said finger member'and form a laterally offset hook opening in a direction normal to the unbent portion of the wire.

17. In apparatus for making mounts for electric lamps and similar devices, support means for astem having a lead wire extending therefrom, and hook-forming mechanism comprising a pair of jaws arranged to grip an intermediate portion of said lead wire, a finger member at the opposite side of said jaws from the stem support means, said finger member extending laterally of the line between said jaws and said stem support means and being mounted to pivot toward said jaws when shaping the hook to prevent longitudinal strain on the lead wire, means to move said finger member longitudinally to carry its and laterally of and through the position occupied by the end portion of the lead wire extend.-

in a direction normal to the unbent portion of the wire. Y

18. In apparatus for making mounts for electric lamps and similar devices, support means for a stem having a pair of lead wires extending therefrom in substantially parallel relationship, and hook-forming mechanism comprising jaw members arranged to grip an intermediate portion of each of said lead wires, and. formin means at the opposite side of said jaw members from the stem support means for forming the end portions of said wires into laterally oilset hooks opening in opposite directions normal to the plane passing through the unbent portions of the wires.

19. In apparatus for making mounts for electric lamps and similar devices, support means for a stem having a pair of lead wires extending therefrom in substantially parallel relationship, and hook-forming mechanism comprising jaw members arranged to grip an intermediate portion of each of said lead wires, a pair of finger members each located adjacent the position occupied by one of said lead wires at the opposite side of said jaw members from the stem support means, means to move each of said finger members laterally of and through the position occupied by the end portion of the adjacent lead wire extending beyond said jaw members to bend said wires laterally, and forming members each associated with and located in opposed relation to one of said finger members and adapted to bend the said end portion of the adjacent wir back around the said associated finger member to form a laterally oifset hook opening in a direction normal to the unbent portion of the wire, the two flnger'members being on Opposite sides of the plane passing through the unbent portions of the lead wires and the two forming members likewise being on opposite sides of said plane whereby to form said hooks so that they open in opposite directions normal to said plane.

20. In apparatus for making mounts for electric lamps and similar devices, support means for a stem having a pair of lead wir'es extending therefrom in substantially parallel relationship, and hook-forming mechanism comprising jaw members arranged to grip an intermediate portion of each of said lead'wires, a pair of finger members each located adjacent the position occupied by one of said lead wires at the opposite side of said jaw members from the stem support means, means to move each of said fi ger members laterally of and through the position occupied by the end portion of the adjacent lead wire extending beyond said jaw members to bend said wires laterally, and forming members each associated with and located in opposed relation to one of said finger members, and means for moving said forming members in a direction opposite to the direction of movement of the associated finger member to bend the adjacent wire back around said finger member and form a laterally oil'set hook opening in a direction normal to the unbent portion of the wire, the two finger members be-' ing on opposite sides of the plane passing throuah the unbent portions of the lead wires and the two forming members likewise being on opposite sides of said plane whereby to form said hooks so that they open in opposite directions normal to said JOHN FLAWS, JR.

" 0- plane.