US2940220A - Bulb to mount assembly, preheater and transfer device - Google Patents

Description

H. W. ROEBER June 14, 1960 BULB TO MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE Filed Dec. 16, 1955 '7 Sheets-Sheet 1 q nnqflonnn Q oooaoa un 0/0 0 I n no no on o n \\.O

o w. o um 3 3 Q2 3 HENRY w. ROEBER ATTO H. W. ROEBER BULB TO MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE Filed Dec. 16, 1955 FROM DRIVE OF SEALE R 7 Sheets-Sheet 2 ATTORN June 14, 1960 H. w. ROEBER BULB TO MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE 7 Sheets-Sheet 3 Filed Dec. 16, 1955 INVENTOR.

HENRY W. ROEBEH W1 ATTOR N ZY June 14, 1960 H. w. ROEBER I 2,940,220

BULB T0 MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE Filed Dec. 16, 1955 7 Sheets-Sheet 4 I as I lNVENTOR HENRY W. ROEBER W ATTORNEY June 14, 1960 H. w. ROEBER BULB T0 MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE Filed Dec. 16, 1955 7 Sheets-Sheet 5 INVENTOR. HENRY W. ROEBER ATTORNEY 7 Sheets-Sheet 6 I If ATTOR June 14, 1960 H. w. ROEBER BULB TO MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE Filed Dec. 16, 1955 2 2 o m w "YIL f3 2 a V 2 5 In 0 L I 6 O 7 4 2 m m w w I :5 3 9 B 2 I B O I 3 2 W 2 2 B 2 7 U W 1 a B 1 0 June 14, 1960 H. w. ROEBER 2,940,220

BULB TO MOUNT ASSEMBLY, PREHEATER AND TRANSFER DEVICE Filed Dec. 16, 1955 7 Sheets-Sheet 7 WWW/i,

INVENTOR ls HENRY w. ROEBER" BY I FIE-13 W ATTORNEY BULB TO MOUNT ASSEMBLY, PREHEA'I'ER AND TRANSFER DEVICE Henry W. Roeber, Emporium, Pa., assignor, by mesne assignments, to Sylvania Electric Products, IHIL, Wilmington, Del., a corporation of Delaware Filed Dec. 16, 1955, Ser. No. 553,569

11 Claims. (C1. 49 2) This invention relates to apparatus which functions to assemble the bulb of an electron tube with its stern and associated mount, preheat the assembly, and transfer the assembly to a machine synchronized for movement with the apparatus and which machine forces the bulb onto the stem and seals the two together.

In the prior art it has been customary for an operator to assemble the bulb and stem-mount by manually slipping the bulb over the mount to a position where the lower edge of the bulb was close to but spaced from the stem to allow for free escape of gases from within the bulb when the assembly was subsequently preheated. Then the operator would position the assembly in a preheater which comprised some form of conveyor moving through a heated chamber. At the other end of the preheater the preheated assembly would be removed and placed on a peg of a a sealing machine for effecting sealing of bulb to wafer, the operator pressing the bulb onto the stem after the assembly is placed on the sealing machine.

It is an object of this invention to provide a preheating machine which shall automatically assemble a bulb with a stem-mount.

It is a further object of the invention to provide a preheating machine with mechanism to automatically transfer a preheated bulb and stem assembly from the preheater to an associated bulb-to-stem sealing machine.

It is a still further object of the invention to so construct the preheater and bulb assembler as to facilitate component part loading of the machine by the operator.

It is a still further object to provide a machine which shall telescope a bulb of an electron tube over a mount afiixed to a stem.

These and other objects will be made apparent after consideration of the following specification when taken in conjunction with the accompanying drawing in which Figs. la and lb together constitute a plan view of the machine, with parts broken away and in section to illustrate otherwise hidden parts, the sectional parts being generally along the line 1a1a of Fig. 4 and lb-lb of Fig. 10.

Fig. 2 is a sectional view with parts broken away to show intermittent drive mechanism for the conveyors of the machine.

Fig. 3 is a fragmental elevational view of the machine taken a little to the left of a loading station and about centrally, longitudinally, of Fig. In.

Fig. 4 is a section through the loading station taken on the line 44 of Fig. 1a.

Fig. 5 is a section on the line 5-5 of Fig. 4 showing how the exhaust tabulation of a bulb may be held a carrier on a top conveyor.

Fig. 6 is a view, partly in section, of a peg for bolding a stem mount assembly, the peg being mounted on a bottom conveyor.

Fig. 7 is a section through the machine taken on the line .7-'.-7 of Fig. la and looking in the direction ofthe arrows.

States aren't Fig. 8 is a sectional vertical elevation of the drive mechanism shown in Fig. 2.

Fig. 9 is a section on the line 99 of Fig. 7.

Fig. 10 is an elevational view, partly in section, of the bulb and stem assembly machine unloading mechanism. as viewed from the left in Fig. lb.

Fig. 11 is a view of the unloading mechanism as viewed from the right in Fig. lb.

Fig. 12 is an enlargement of the jaw mechanism employed to grasp the assembly during its transfer from the preheater and assembly apparatus to the sealing machine, and

Fig. 13 is a view, partly in section, showing a portion of the mechanism operative to open and close the jaws 14, open end down, with their exhaust tubulations 16 extending upwardly from the domes of the bulbs and the lower conveyor 12 being adapted to carry stems 18 with their stem afiixed mounts 2i) and which mounts include insulating spacers 19 such as mica.

A loading station indicated as such and also as 21 is provided whereat the runs of the conveyors are vertically offset to facilitate conveyor loading. To the left of the loading station, as seen in Fig. 1a, means are provided, generally indicated as 22, to align the bulb over the stem-mount and push the bulb down in telescoped relation over the mount so that the bottom of the bulb is close to but spaced from the stem, this occuring in proper timed relationship with index movement of the conveyors. The conveyors, in travelling clockwise as viewed in Figs. la and lb, carry the assembled bulb and stem, see Fig. 4, between heaters 23 providedwith heat insulating enclosures 24 and 25 to an unloading station, indicated generally as 26 whereat the bulb assembly is transferred from the conveyors to a sealer- 28 for sealing of the bulb to stem, the sealing being effected after the bulb has been automatically thrust down over the stem by mechanism on the sealer. The sealer is not shown in detail since it is not part of the invention.

The conveyors are arranged so that as they pass around end sprockets at the unloading station where the con-1 veyors are close to the sealer, the sealer having an indexible turret provided with circumferentially arranged pegs.

Now referring to the drawings in greater detail:

The machine comprises a long narrow base or table 30 on which are mounted spaced and aligned webbed beams 32 provided with arms 34 supporting the heat iusulating enclosures 25. This enclosure is a box-like body filled with heat insulating material 36. A similar enclosure 24 is mounted on brackets 38 extending from side walls of the base, the opposed enclosures being spaced from one another as seen in Figs. 4 and 7 and providing space therebetween for the longitudinal travel of bulb and stem-mount assemblies. Each of the enclosures has a longitudinal recess in the wall adjacent the path of travel of the tube assemblies to accommodate the heaters 23 of conventional helical coil construction.

The heaters may run from a location close to the loading station 21 to any desired extent around the machine,

and by the table, these chains running around dualsprockets 44, 46 mounted at the longitudinal ends of the table. Each alternate link of the upper chain is provided with a holder 48, see Figs. 4 and 5, for resiliently re- Patented June 14,1960

taining an exhaust tubulation 16 and attached bulb, the

" holder comprising a pair of right angled plates 50 secured to a right angled arm2 provided on the forward side,or the sidefacing the operator, with converging cheeks 54 to guide a tubulation into a seat formed in part as a semicylindrical recess o'n the angular arm 52 and by a pair of balls 56, spring pressed together by a pair of levers 58, pivoted on the arm and urged to press against the balls by a. spring 60. Each alternate link' of the lower chain is provided with a pair of angled plates 62'supporting a casting 64 on which is mounted a post 66 formed at its upper end, see Fig. 6, into a peg 68 with a circular groove 70 in its upper face to'accommodate the leads of a stem assembly, with the lower face of the stem 18 resting on the upper face of the peg. The

upper andlower conveyor tracks run in endless horizontal orbits with generally straight run portions connected by loops and are in vertical registration except at the loading'station 21. At this station, see Fig. 1 and Big. 4, the orbits are offset. The lower traek'42 and the egs 68 are set in closer to,the longitudinal center of the table than the upper track 40 and its bulb holders'48. As a result, an operator may load the pegs with stem assemblies at the loading station and then load the upper conveyor holders-with tubulated bulbs without the hand of the operator inadvertently engaging and displacing the stem assemblies from their pegs. As can be seen, the operator may, with the vertically ofiset conveyor arrangement disclosed, during the process of clipping in a tubulation into the upper holder, have the knuckles of f the hand in the horizontal plane of the stem assembly and yet not engage the same.

Reverting to Figs. 1b, 2 and 8 it will be'seen that the conveyors and 12 are driven through the dual sprockets 46; These sprockets are maintained spaced apart bya sleeve 72. The-sleeve and sprockets find bearing. on ,a

shouldered portion of a post 74 and are rotatably mount ed on the post; 'To the lower sprocket i s fixed an inverted cup 76 flanged at its lower open end, as at 78, the flange being provided with equally spaced circumferentially arranged driving studs 80-provided with anti friction rolls 81 engageable with a barrel cam 82 fixed to a cross shaft 84 driven from the drive coupled to the, sealer '28,

, 4 bars would be moved in opposite directions. Each of the rack bars is fastened at its end to a half conical guide. jaw 116, each jaw having ar arcuate tapering wall 117 terminating in a shoulder 118'against which the bulb will come to rest when thrust down into thejaws. The jaws are resiliently-urged toward each other through the intermediary of a spring 119 fastened at one end to a x d orizont Pin, 1 09 Il s a r a 2% a a its other end to 2. depending pin mounted at the end of a bar 122 slidably mounted in the lower boxes 107 and provided with rack segments 110 heldto the bar by screws 112, the segments 11}! engagingboth of the lower gears 105 on the same sides thereof. To enable indexing 'movement of thebulbs lwithout interferenoe' from the 7 pressed toward each other after indexing movement of the conveyors and ;will remain so'spring pressed together during downward movement of the carfiage 92, as will'be described, and be again opened on upward movement of the carriage, the conveyors indexing during said upward l movement ,of the carriage.

"The carriage 92 is slid on the posts .94 byreason of rotation of'cam 130, also fixed to shaft 86. This cam has a recessed path on its righthand side face, as seen in Fig. 1a, in which rides a cam follower 132 on a'lever "13,4, pivoted on the shaft 90, and the forward end of which is connected by a link 136 to the lower portion of carriage 92. As the earn 129 rotates, the carriage 92 will perform quick vertical reciprocatory movements. Movable with the carriage is a thrust. rod 138. This rod V is freely slidable in bearings'in the carriage 92 and is resiliently held down against a long lever an era bell crank lever 140, rotatably mounted on the carriage, a coil spring 142 encircling the rod. This spring reacts at the top I against a carriage portion and at the bottom against a whereby the preheater and sealer are driven in synchro-.

nism. The cams in the barrel cam are shaped to impart intermittent drive to the sprockets 46. V V

The shaft 84 is geared --to a main longitudinal cam shaft86 mounted ind-brackets 88 supported by the'table 30. Also mounted in these brackets is a second longi- I tudinal shaft 90, the shaft 90 forming a bearing for the.

hubs of several angled levers, as will be described.

Now considering Figs. 1a, '3 and '7, the vertically spaced conveyorsQ-as they move to the left from the loading station21 to the pusherstatiqn 22, come into vertical registersothataglassbulb 14 is axially located with respect to the axis of a glass stem'and mount supported on a peg 68. At the pusher station means are provided-to insure correct axial centering ,of the bulb. with respect to the stem and to thrust the centered bulb partway down toward the stem 18 and over the mount 29. a

At this pusher station ther'e is a vertically reciprocat: able carriage92 arranged transverse to the conveyorsand slidable on two posts 94 fixedly mounted in a mercies securedto the table 30, "The carriage comprises-a webbed casting including a cross bar 98 and two vertical legs 100,-one on each side of the lower conveyor. P-arallel block 144 pinned to the rod, the block being guided in its vertical movement .by a guide 146 fastened by screws or the like to the carriage 92. As a result, therod is held against rotation while it may have a limited vertical reciprocatable movement with respect to the carriage .192.

a as it forces its way down the conical walls. A

of the bulb down onto the seat 118 assures subsequent with thelegs are'oscillatable shafts 102 :each having gear '104 fixed on the upper ends and like gears :105 on their lower ends, the gears each lying in upper and lower gear " boxes 106 and 107, respectively The upper gears each :mesh with a rack=bar 108, one rack bar beingibehinda gear as viewed *in'zFig-"fli'and the other; rack bar being Iin :front of a ear "so that ion 1 simultaneous rotat-ionnfdheshaftsgLMin the .samezdirectiori, the rack At the upper end of the rod is a vertically adjustable pusher finger 148 which normally liesi'n' a plane above the level of the, tubulation 16 but is in vertical register therewith. After the jaws '116'have closed on the bulb, as seen injFig. 7, the long leverarm is permitted to lower, and the spring 142 operates to' thrust the bulb down in between the jaws and onto the shoulder llfift'he jaws spreading, as necessary, to accommodate the bulb The forcing accurate spacing of the bulb above the stem. The tubulation 16 being only frictionally held by .the holder [48, is permitted to be forced down in the holder. The jaws are permitted to spread because of the resiliency provided by the spring v.119. Afterltheibulb 14 has been-lthrust down onto its seat, the carriage and pusher rod move down together slipping the bulb overt-he mount 29until the bulbbottomclosely approaches the stem '18, as seen,

for example, on the right in Fig-7. The bulb Lisretained in this position because the, inner surface of the bulb is in frictional .engagementrwith the mica spacers. 19 of the mount. Then after the jaws open, the carriage starts to move upwardly under iniiuence' of the cam 139.

During the upward motion f the carriag theagthrnst I rod 138 is forced upwardly against the actiomofi spring cam sh sfi, saidrcam reac ing against afollowererr-a lever arm 152 also mounted on stub shaft 127. The lever arm 152 thrusts against the follower on the depending second arm of the bell crank lever 140, rotating the lever clockwise, as viewed in Fig. 7, and forcing the rod 138 upwardly. The cam 150 is so contoured that just prior to the initial downward movement of the carriage, the spring 142 can react to rotate the bell crank 140 counterclockwise, as seen in Fig. 7.

The bulb after assembly with the stem-mount, is then indexed through the long preheater chamber wherein the tube parts are preheated to initially process parts within the bulb and bring the glass envelope up in temperature to inhibit glass cracking during subsequent processing of the tube.

The heater, in the preferred embodiment, runs substantially to the unloading station at 26, as seen in Fig. 1b. At this station, transfer means are provided to remove a tube assembly from the conveyor chains and translate it to the sealer 28. Since the turret of the sealer operates in synchronism with the movement of parts in the preheater, orderly loading of the sealer is attained.

At the unloading station, see Figs. to 13, a pair of unloader jaws generally indicated as 160 and 162 functions to lift a bulb assembly off the pegs of the lower conveyor, and remove the exhaust tubulation from its chuck, move the assembly over an indexed peg on a bulb-to-stem sealer, move the assembly down onto the peg of the sealer and return to the conveyors for repeating the process. These jaws are supported for movement on a frame 164 provided with a collar 166 pinned to a hollow post 168 vertically reciprocatable in a sleeve 170 mounted on the table 30. The hollow post is moved upwardly against the action of gravity by engagement of slotted portions 172 thereof with a forked end of a lever 174 pivoted on an extension from the sleeve 170. The lever is operated by a cam 176 fixed on cam shaft 86. The vertical movement of the frame serves to lift an assembled bulb and stem-mount from off a peg on the preheater and, after the unloader jaws are over a peg on the sealer, to move the assembly down onto the sealer peg. To open and close the jaws, there is provided a second unloader cam 178 fixed on the shaft 86. This second cam operates on a double armed lever 180. The hub of this lever is mounted on the long shaft 90 and a long arm of the lever has a forked end straddling an anti-friction roller 182 mounted on the lower end of a rod 184 passing through the hollow post 168 and to the upper end of which is afiixed a rack bar 186 engaged with a rack driven gear 188. The rack driven gear, see Fig. 11, is mounted on the end of a shaft gear 190 with gear teeth running longitudinally of the length of the shaft gear in the space between side cheeks of the frame 164. The frame also fixedly mounts a pair of guide rods arranged parallelly to the shaft gear, one rod 192 being supported between two arms on the frame and the other rod 194 being directly above the shaft 19.0 and back of rod 192 as viewed in Fig. 11. Slidable on the pair of rods is a carriage 196 within which is a way 198 guiding two oppositely reciprocatable superimposed bars, these being designated as a slidable top bar 200 and a slidable lower bar 262. To the top bar is attached a rack bar 201 which overlies and engages with the teeth on elongated gear 190 and to the bottom bar is attached a rack bar 203 which underlies and engages with the teeth of the same gear. Thus reciprocation of the rack bar 186 causes oscillatory movement of the elongated gear and opposite reciprocating movement of the bars 200 and 202, regardless of the position of the carriage 196 longitudinally of the frame 164. The upper bar mounts the jaw 160 and the lower bar mounts the jaw 162, via angled supports 204 and 206 respectively. The jaws comprise three vertically spaced pairs of bulb assembly holding means. shaped and positioned to engage around the exhaust tubu- The uppermost pair 208 is lation 16 of the bulb assembly; the middle pair 210 is shaped to engage the glass bulb 14; and the lowermost pair 212 is recessed to embrace substantially the entire rim of the stem 13. When the carriage 196 moves from the extreme end of the frame 164 as seen in Fig. 1b toward a bulb assembly on the chain conveyor, the jaws 16d and 162, if not already opened wide, are so opened by operation of the cam connected to the rack bar 186. The parts are so timed that when the jaws have travelled from in back of the front run of the conveyor forwardly to a position Where they are in alignment with the conveyor runs and on opposite sides of the bulb, the jaws will close thereon as shown in Fig. 12. The position of the jaws back of the runs and between the conveyors is necessary to allow the positioning of a bulb assembly before the jaws and to a position where the bulb and stem may be grasped by the jaws on preliminary advance of the carriage 196 toward the sealer. Next, see Fig. 10, the hollow post 163 will be elevated, lifting the carriage 164, jaws and 162 and the tube assembly off the peg. The post is prevented from rotating in the sleeve by engagement of the rack 186 with the gear 188 and by engagement of an angled bar 214 mounted on the post within a slot 216 formed in an extension from the sleeve 170. The frame 164 when thus guided will lie at an angle to and between the conveyors at the unloaded portion thereof and directed toward the sealer. The unloading jaws, because of the configuration of the angled supports 204 and 206 will be in a line of, short travel between the preheater and sealer. After the jaws have engaged a tube assembly, the carriage 196 is shifted to a position Where the jaws are moved over an indexed peg 217 on the sealer.

The means for moving the clamp jaws toward and from the sealer comprises a third cam 218, see Fig. 1b of the group of unloader cams provided with a recessed cam track like that in cam 130 and operative on a bell crank lever 220 rotatably mounted on shaft 91 The lever 220 is universally jointed to a long link 222 which is pivoted to an arm 224 of a collar 226 fixed to a vertical shaft 228 oscillatable in a bearing 230 fixed to the table 30. The shaft at its upper end has an arm 232 fixed thereto connected by a link 234 provided with universal joints to a stud 236 mounted on the carriage 196. When the unloader jaws have reached a position over a sealer peg, the lever will be operated to lower the carriage to position the bulb assembly on the peg. The parts are so timed, that after this has been effected, the rack bar 186 will open the unloader jaws 160 and 162, and the cam 218 will withdraw the jaws to a position behind the chain conveyors. When the jaws are in this position, the conveyors are indexed to bring a bulb assembly in front of the jaws.

Having thus described the invention, what is claimed 1s:

1. A pair of vertically spaced endless conveyors running in horizontal orbits, means on each of the conveyors for supporting component parts of an assembly, the runs of said conveyors being in vertical registration throughout the major portions of their orbits, the runs being out of register at a portion intermediate the length of the conveyors to facilitate loading of the conveyors.

2. A pair of vertically spaced endless conveyors run ning in horizontal orbits, the conveyors being in vertical registration throughout their orbits except at a small portion of the orbits intermediate the length of the con veyors, means on each of the conveyors for holding component parts of an article, means along the path of the conveyors having a part movable across the orbits of the conveyors for moving the parts together into telescoped relation while the conveyors individually still hold the component parts, means for processing the moved parts, and means for removing the telescoped parts from the conveyors.

1 .-;Man to. te e cop a 't bula ed bulbbver'a stem 919ml wit the bo tom of the bulb spaced :1 fixed dis-. tense. rom th g pp, or the stem,.comprisin va m s fo su port n es emzm untat afixed p nt a r frictionally and slidably supporting the tubulation not a tubulated bulb with the bulb axially of the stem-mount, a oarriage movable in a plane 'parallel to the axis of the bulb and carrying rneans having a shoulder to be engaged by the bottom of'the bulb, a finger movable relative to he-ca i ge a d in h a direction a ap d o a e the free end b2 116 tubulation to thrust the bulb down against theshqulder, and means to move the carriage with the-bulb (so positioned against the shoulder so as [to reiafiv t'o gage th free end of the tribulation to thrust bulb," own 'ag nst ine'snomdegan means to more carriage wit the bulb so pos'itionda ainst the shoulder sdasftot es t t V angering th same t'o'a fi xed distiicjefr'rnth Apair of vertically spaced endless "cot iv being in; registration, the other runsof theconveyqrs being in registration at and near the loops of the conveyors Iaricf out of registration along 'a length'reniloved from the loops, means on each of the conveyors for holding component parts of an article, means located adjacent ofithe conveyors which are in registration, movable transverse to the planes of the conveyors, for. adjusting o line-in l fi ai al Ba ia P et was; having two loops and two intermediate runs connecting thei loops, the two loops and one run of each of the conveyors b on es aky e bott In ofth'e bill are silien'tly urged ringer movable to the Earriageand in the same direction adapted a the bulb ovr'th naumps'iaestem the parts' so' thatth ey are frictionally held relative to" each a V oth'er'whilethe conveyors individually still hold comporient parts, and means for removing'the so frictionally held parts from the conveyors. M to I t or 6'. Means to telescope a tubulated'bulb i e er a stem mount with the bottom of the bulb at a. fixed distance from thestenr, saic? means comprising a" pair of spaced p r S a h e lr s t by ine o d supports, a tubulated bulb slidablylc'arri'ecl by the' other ct -said sup'ports-,;avertically reciprocatable carriage hav ing'apair ofjaw's, one onieach-side' of the supports and between the same, means at one position of saidcarriage for effecting movement of the jaws toward e'a'ch' other to engage-a bulb, a finger movable from a first position to engage a tubulation on said bulb to thrust the bulbdown Wardly betw'eenthejaws, shoulders on said'jaw'sto limit the downward-motion of the bulb relative to the carriage, means for moving the carriageand'finger axially of the bulb through a-fixed distance to a second position to cause thebulb "to telescope amount and bringthe'bottom of the bulb to-'a fii ed distance from. the stem and means to" open the jaws and move the carriage and the finger to their first positions.

7 Means to' telescope; a tubulated. bulb over a stem mount yvith t e: bottom ofthe. bulb} ata fixed distance fr'o rnjthe stern, said means v comprising a pair of spaced suppjo s; a stem mount rfiiredly carried by one of said 7 'atnb'ulatedbulb slidably carried by the otherofisaid" n pangga vertically .reciprocatable' carriage having alpai ofjaws, one on each, side of, thesupports 2 andfb etwejenjhe same," means at one position of said carn ge tar'tetreczingimovemem of the jaws towardeach;

tion resiliently UI'gEdHiOLEBgZl-EQ attubulation :on said bulb. to thrust the bulb Idownwardly between theljaws, shoulders pn saidfjawsyto limit the downward motion of the bulb relative to the carriage, means for moving the carrifage and finger. axially of the bulb through a fixed distance toa second position-to cause the bulb to telescope a mount andbring the bottomot the bu1b;to a fixed distance from the stem andgneans to. open the jaws and move the carriagerandthe finger .to their first .p'dsiiiOnS. V V. 1 I

8 Means to telescope artubulatedbulbover .a stem. mount with; the bottom ofgthewlgulbn at afixed distance iwmlh s ern; S d means; comprising ;a ,pair or spaced supports, a stem mount fixedly carried by one.of:said rm r ra tubu edrbulb .slidably carried hrth'e other o fia di upn rtaja Ye i a yre iproc table carria have selPe L tiaw .q erq teachr ide not illetsupportsland betw en 2 s me .zn ane te epesition Qfsaid carriage- QIYQfi Qfi QEJQ YWIQM fil ej wsn d each otherwto le se? b hifisfin et movable from a firs positionto engage a t. w y w nthe larv v esl aedi fila iflnd Shoulders 911 44. hits," al e t l downw d; mot on of: thetbulb at v s the r e e rm nsiqr; vin the ar i g and finger ajrially of. the bulb through afixed distance .toa

ewe rb i i t se ss $55 tere s ep a mqun anclt ti ist 9 Pifil g u h to? firedriise efmmthe: a st m i cm.

to open-the jaws and-move the carriage and the f nger X o g first positions. 7

"1a M s f i fi st t eleis biii sf initiated. iiiib Siipp s fliefi o r fo vef q mlidah y re.

inin i f i lilfli d u ha??? P5 5 ye a ly. Is; ciproc'atable peerage, inetuainga crossbar I v t p v t of the peg; alpalr vertical-1y oscillatable shaft mounted i11 the crossbar; means for simultaneously oscillating the shafts, a pan of bars at the upper end of thejranle each carr ing a bulbjnga'ging jaw, ineans connectingthe oscill'atable shafts with the bars ,for moving the jaws toward and from each other, memes-toms; rod slidable of'thepeg -apair of vert cal. oscillatable shafts mounted v in" the. cross bar, r'ne'a'nsj' for simultaneously oscillating the shaftsg' a' pair of b rs at the'upper end otithe name each nga'g'ing'jjaw', e'ac'hjaw having a.bulb

s m A seatand a tapering; Wall leading;tolsaid seat, means o necting-ithej' osci llaftajble shfts'with the bars foir' m e'iaw t ward and f e h'o h r al e t c l. ro'd slidable in vertically reciprocatable caifiage,

means fpir'l raising I the rod relative to T the: resilient 7 means for loweririg'jthe roil relative to the frarr ie, a finger V on the rod exten f'rig latierallyover the tubulatiortit o press e'i b l fiii l ifeua l sn tia downwa m re; eat 'Q t e c rri e whereby he bulb first; be

aligned axially with respectjo the peg because of the slopingwalls-and seats ofthejaws and-then telescope over -11-. Means ror efiectingtelescoping of a tubblat'edbulb" over a stem. carrying 1a mount'comprising,.. ai'peg'for sup portingjthesterma holder forz've rticallyslidably retain f ing; th'ej'tubulatedbulb.:above the peg; a-vertically recipr rocatable carriage; said: carriagecom risingt a in-- eluding a cross bar and vertical legs one on each side of the peg, a pair of vertical oscillatable shafts mounted in the cross bar, means for simultaneously oscillating the shafts, a pair of bars at the upper end of the frame each carrying a bulb engaging jaw, each jaw having a bulb seat and a tapering wall leading to said seat, means connecting the oscillatable shafts with the bars for moving the jaws toward and from each other, a vertical thrust rod slidable in said vertically reciprocatable cam'age, means for raising the rod relative to the frame, resilient means for lowering the rod relative to the frame, a finger on the rod extending laterally over the tubulation to press the tubulation downward upon initial downward movement of the carriage whereby the bulb will be seated in the jaws at a definite height relative to the frame and in axial alignment with the peg, continued downward movement of the frame bringing the bulb to a definite height relative to the peg.

References Cited in the file of this patent UNITED STATES PATENTS Higgins July 27, Loebe et al Apr. 2, Westin June 24, Wildeboer Nov. 17, Gustin et a1 July 2, Schwab Dec. 3, Van Sant Dec. 10, Donovan et al Apr. 4, Schneider et a1. Feb. 23, Gray Apr. 16, Hinkley Oct. 29, Eisler Apr. 22, Gardner et a1. May 5, Hinkley May 12, Gartner Dec. 8, Roeber Oct. 12,

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