US2327033A

US2327033A - Filament mounting machine

Info

Publication number: US2327033A
Application number: US420474A
Authority: US
Inventors: Jr John Flaws
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1941-11-26
Filing date: 1941-11-26
Publication date: 1943-08-17
Anticipated expiration: 1960-08-17
Also published as: GB570803A

Description

V Aug. 17, 1943. J. FLAWS, JR

FILAMEINI MOUNTING MACHINE 3 Sheets-Sheet 1 Filed Nov. 26, 1941 Aug. 17, 1943. J, FLAW JR 2,327,033

FILAMENT MOUNTING MACHINE Filed Nov. 26, 1941 3 Sheets-Sheet 2 John Flaws Jr.

1 His AtTOT-ne J Aug. 17, 1943. J. FLAWS, JR FILAMENT Mouuwma MACHINE Filed Nov. 26, 1941 3 Sheets-Sheet 3 lnvenifor John Haws Jr.

' His At'for'neg.

V. II lunu v--...

UNITED STATES PATENT OFFICE 2,327,033 FILAMENT MOUNTING MACHINE John Flaws, Jr., East Cleveland, Ohio, assignor to General Electric Company, a corporation of New York Application November 26, 1941, Serial No. 420,474 15 Claims. (Cl. 176-3) My invention relates to the mounting of fi Still other objects and advantages of my invenments on the leads of a fiash lamp, incandenscent tion will appear from the following detailed delamp, or similarly constructed electrical device. scription of species thereof, and from the accom- More particularly, my invention relates to appapanying drawings, ratus for automatically presenting a filamentary In the drawings, Fig. 1 is a plan view of wire in mounting relation to a pair of leads eX- mount making apparatus comprising my inventending from a stem and for connecting said tion; Fig. 2 is perspective view of one of the wire securely to the end portions of said leads in movable heads of said apparatus; Fig. 3 is a side a satisfactory and ready manner. elevation of lead wire grooving (or notching) Owing to the very small size and length of and trimming apparatus at station A; Fig. 4 is a filaments used on low voltage circuits and the partially exploded perspective view of the essenneed of providing filament-to-lead connections tial parts of the filament mounting apparatus of uniformly low resistance, the operation of at station B; Fig. 4a is a plan view, on an enmounting such filaments has always been diflilarged scale, of a notched lead positioning plate cult and has required considerable care and skill. forming part of the filament mounting appa- One object of my invention is to provide apparatus; Figs. 5a. and 5b are side elevations on a ratus which is particularly adapted to mount filalarger scale of the grooved end of a lead at two ments of such small size and low strength as were different stages in the mounting operation; Figs. heretofore impractical to mount commercially 6 and '7 are side elevations at right angles to each either manually or semi-automatically. Filaother of the mounting apparatus at station B; ments of this type are desirable in incandescent Fig. 8 is a side elevation of groove closing means lamps in that they increase the efficiency thereof of the apparatus; Fig. 9 is a vertical section and are desirable in flash lamps in that they through the portion of the closing means located reduce the electrical energy required to start said along line 9-9 in Fig. 8, the said means being lamps and they also reduce the starting lag shown at a different position than it is shown thereof. in said Fig. 8; 10 is a side elevation of test Another object of my invention is to provide apparatus at station C; and Fig. 11 is a comapparatus for automatically connecting a filabination schematic drawing and wiring diagram ment to leads in a manner which assures a very of mount testing and control apparatus located secure and low resistance connection. Such filaat and adjacent station D. ment-to-lead connections are of utmost impor- The mounting operations taking place at the tance in flash lamps and the smaller incandescent various stations A to D inclusive depend on the lamps since lamps of these types must operate accurate placement of two spaced leads at each on low voltage electric currents and have uniform of said stations, an operation which is performed, resistance. in this particular instance, by an endless belt Another object of my invention is to provide type carrier l5 (Fig. 1) having heads l6 at reguapparatus for mounting a very short filament on larly spaced intervals. The carrier l5 shown is the leads of a lamp or the like. that disclosed in detail in my Patent 1,907,532 of Another object of my invention is to provide May 9, 1933. Each head It of the carrier l5 apparatus for testing the connections between comprises one pairof jaws I1 and Ill (Fig. 2) for the filament and leads by attempting to pull one gripping a stem IS in which the leads 2i] and 2t from theother. The test operation is a direct are sealed, and a second pair of

jaws

22 and 23 indication of the strength of the filament-to-lead for gripping the exhaust tube 24. The vertically connections and also is a very reliable indication disposed shaft 25 and the sleeve 26 surrounding of the whole mounting operation as loose or low 46 it provide the means of holding the jaws ll-l8 strength connections are almost the only cause and 22--23 in proper relation and are in turn of high resistance connections. held in position by the bracket 21 which forms 2.

Another object of my invention is to provide link in the carrier l5 and which engages the apparatus for indicating and removing the lead central supporting and actuating means 28 thereand filament assemblies which have been defecof. The arm 29 on the upper end of the shaft 25 tively manufactured. This operation is conand the rod 30 which extends downwardly theretrolled by the passage of electrical energy through from provide for the operation of the jaws l'lthe assembly after manufacture to ascertain l8 and 2223. As disclosed in my patent herewhether said assembly has greater resistance inbefore referred to, the carrier l5 is preferably than a satisfactory stem and. is defective. 66 one part of apparatus for assembling and forming the stem I9, and the mounting apparatus, of which my present disclosure is an example, is arranged so as to perform the various mounting operations at various stations taken by the stem I9 in the course of its movement.

The first step in the mounting of the filament on the leads and 2| occurs at station A, where the lower ends of the leads 20 and 2| are trimmed to length and, while still held by the trimming means, are grooved or notched. The apparatus for these operations appears in Figs. 1 and 3 and comprises a positioning finger 3| and a holding finger 32 which are located on opposite sides of the path of movement of the lower ends of the leads 29 and 2| and which are carried in against said leads 2!] and 2| by the closing movement of the

jaws

33 and 34 on which they are mounted. The V-shaped notches in the end of the finger 3| gather up and position misplaced leads 20 and 2| before the end of the finger 32 comes in contact therewith, whereupon said leads 20 and 2| are pressed against the block 35, mounted below finger 3| on jaw 33, by said finger 32. The finger 32 slides within the jaw 34 and compresses the spring 36 located between its end and the plate 31 onjaW 34 as said jaw 34 closes.

The

jaws

33 and 34 are pivoted on the pin 38 carried by the standard 39 and are closed by means causing the upward movement of the slide 49 which advances the wedge shaped end 4| thereof into position between the rollers 42 on the lower ends of said

jaws

33 and 34 which means is connected to said slide through the rod 43. The means of actuating the rod 43 is preferably cam controlled means coupled to the common drive apparatus for the conveyor I5 since the

jaws

33 and 34 must operate in proper timed relation to the movements thereof and operates against the tension of the spring 44 which is attached to both

jaws

33 and 34 and which separates them when the slide 46 again moves down. At the upper limit of movement of the slide 40 the block 35 passes over the upper edge of the block 45 to trim off both leads to the desired length, whereupon a short rest interval occurs in which the grooving or notching portion of the apparatus completes its cycle of operation.

The grooving or notching portion of the apparatus at station A comprises the circular discshaped roll 46 which turns freely on the spindle 46' of the arm 41 attached to the slide 48 and which is caused to move across the lower ends of the leads 26 and 2| so that a transverse notch or groove 20' (Fig. 5a) is rolled in one lead 20 and then in the other lead 2|. The leads 26 and 2 I, which are in this particular instance made of nickel, do not move or twist during the grooving operation as they are gripped between the finger 32 and the block 35 and rest against the face of block 35, and no difiiculty is experienced making accurately shaped and positioned grooves to one half the thickness of the leads 29 and 2|. As in the prior instance, the apparatus is preferably actuated by cam controlled means (not shown) which is connected by rod 49 to the lever 56 pivoted on the pin 5| on the back of the standard 39 which lever 50 engages the pin 52 in a portion of the slide 48 extending through the ways in which said slide 48 is located. The return movement of the roll 46 does not occur until the

jaws

33 and 34 are separated and the head I6 is in the course of indexing to the next station. By combining the lead trimming and grooving apparatus in one unit very accurate control is afforded over the portions of the leads 20 and 2| extending beyond the grooves therein which is an advantage in flash lamps as it causes said fiash lamps to be more uniform, a very important feature. The leads 20 and 2| in such lamps become coated by a primer composition during the process of dipping the filament into the primer, and if they are not of uniform length the result is an excess of primer material on the lamp mount.

The indexing movement of the carrier I5 advancing the stem I9 to station B positions said stem I9 at a definite location with respect to the various sections of the mounting apparatus at this station which apparatus grips the leads 20 and 2| of said stem I9 to hold them in place, brings the filament wire 53 into mounting relation thereto, spaces said leads 20 and 2| a predetermined amount and then squeezes the metal of the leads 20 and 2| over and around portions of the filament wire 53 to permanently attach them together and form an exceptionally good electrical and mechanical connection therebetween. The cycle of operation of this portion of the apparatus begins before the stem I9 is carried to station B in that the filament wire 53 which is to be attached to said stem I9 is withdrawn from the spool 54 while the said stem I9 is in motion. The spool 54, as shown in Figs. 1 and '7, is mounted on a spindle 55 on an outwardly extending arm of the carriage 56 and, in this particular instance holds filament wire 53 of less than .001 inch diameter, a wire of smaller size than usually considered practicable for hand mounting on large scale production schedules. The end of the wire 53 extending from the spool 54 is threaded through the guide tube 51 on the post 58 extending from the carriage 56, between the friction blocks 59 and 60 (Figs. 1, 4 and '7) and through the opening in the guide BI and extends a definite distance beyond the face of the guide 6|.

As the cycle of operation of this apparatus begins, the jaws 62 and 63 are moved from a retracted position to a position where they can close on the end of the wire 53 by a corresponding movement of the slide 64 which carries the pins 65, 66 on which they are mounted. This movement of the jaws 62 and 63 is possible at this time since the carriage 56 which is mounted in slide ways in the standard 61 is located back in said ways out of the path of movement of the carrier head I6 and stem I9. The ways for the slide 64 are defined by the bracket, 68, which is attached to the carriage 56, and the movable gib 69 which is forced into engagement with said slide 64 so as to offer a limited amount of resistance to movement thereof by the expansion of the springs 10. The springs 16 butt directly against the gib 69 and the bar 1|, the latter of which is mounted on two studs 12 extending upwardly from the bracket 68 through openings in the gib 69 and the open center of the springs 19. The movement of slide 64 is, in turn, produced by movement of the sub-slide 13 located in ways in said slide 64 as the pin 14 in the far end of the said slide 64 is then against the end of the opening 15 in the sub-slide 13, and the movement of said sub-slide 13, which is brought about through arm 16 and the pin 11 extending from the face of the sub-slide 13, is transferred directly thereto. The forward limit of motion of the slide '64 and the sub-slide 13 is determined by the engagement of the stop screw 18 (Figs. 1 and '7) with the bracket 68. Other portions of the operating apparatus for the slide 64 and subslide 13 comprise the shaft 19, to which the arm WIRE. WUmuNu I6 is attached, which extends through a portion of the standard 61; the arm 80 on the opposite end of said shaft 19 which is biased by the spring BI and which engages the lever 82 through the roller 83; and the lever 82 which is pivoted on the pin 84 carried by the standard 61 and which is operated by cam actuated means of the main portion of the machine through the rod 85.

One function of the jaws 62 and 63 is to pull the end portion of the wire 53 to a position in the apparatus which allows it to be carried into mounting relation to the leads 20 and 2| of the stem I9 at station B by succeeding operations of the apparatus. This function of the jaws 62 and 63 is created through a closing motion which causes them to grip the end of the wire 53. and a retracting movement which causes the wire 53 to be pulled from between the friction block 59 and 60 to the desired position. Additional wire 53 is drawn off the spool 54 during this latter interval. Both operations of the jaws 62 and 63 are the result of the returning movement of the arm 16, as the first portion of said movement causes the sub-slide 13 to slide in its ways within the slide 64 until the shank of pin 11 engages the angular inner faces 81 of the jaws 62 and 63. forcing them to close. whereupon all further movement of the arm 16 and pin 11 moves the jaws 62 and 63, the slide 64 and the sub-slide 13 as a unit. At the limit of motion, a taut section of the wire 53 extends between the ends of the jaws 62 and 63 and the friction b ocks 59 and 60 because of the resistance offered to movement of the wire 53 thereby. The resistance offered by the friction blocks 59 and 60 results partially from pressure exerted against block 59 by the expansion force of the spring 83 which is located between the arm 89 of the bracket 90 and the head 9| of the pin 92 and occurs as said blocks 59 and 60 are stationary members. block 60 being attached directly to the bracket 90 and block 59 being located in a channel in block 60 and held by the presence of the head 9| of the pin 92 in a depression (not shown) therein. The pin 92 is slidably mounted in the arm 89 of the bracket 90 and can be raised to allow the block 59 to be removed so that the wire 53 can be placed between said friction blocks 59 and 60 when a new spool of wire 53 is inserted into the apparatus. When a new wire 53 is being, inserted. the guide 5| which is located adjacent the ends of the friction blocks 59 and 60 is swung upward about the screw 93, which attaches it to the block 60, so that the wire 53 can be threaded through the opening in it more readily. After the threading takes place, the guide BI is pushed down until the stop screw 94 engages the extension 95 on the block 60 whereupon the guide 6| and wire 53 are correctly positioned and the friction block 59 can be reinserted.

All of the apparatus described immediately above, except for asmall portion of the jaw actuating apparatus, is mounted on the carriage 56 which remains stationary in the back portion of the ways in the standard 6'! in which it is located. However, now that said apparatus ha operated, the said carriage 56 is moved forward to carry the positioned portion of the filament wire 53 into the grooves in the ends of the leads 20 and 2|. This movement of the carriage 56 is under the control of the lever 96 which engages the pin 91 in the central opening in the back part of the carriage 55 and is produced by cam actuated means (not shown) engaging said lever 96 through the rod 98 and the link 99. The lever 96 is pivoted on the pin 00 held by the standard 61.

Before the movement of the carriage 56 causes the filament wire 53 to engage the said leads 20 and 2|. said leads are positioned laterally in the apparatus as well as at a definite distance from the carriage 56. The first of these positioning operations is produced by the closing movement of two jaws |0| and I02 (Fig. 4) which close sufficiently to carry the notched plate I03 and block I04 respectively against opposite faces of the very ends of said leads 20 and 2|. The angular faces I03 on the end of the plate I03 bordering the notch I04 therein (see Figs. 4 and 4a) engage the leads 20 and 2| and draw them toward each other so that they are positioned laterally and are spaced. A very definite length of the filament wire 53 is therefore required to bridge the space between leads 20 and 2| and all filament assemblies constructed by the apparatus are assured of having very uniform characteris ties. The second positioning operation occurs when the movement of the carriage 56 causes the extended end of the slide I05, which is located below the plate |06 in ways in said carriage 56, to engage the lower portions of said leads 20 and 2|, thereby causing said leads 20 and 2| to be tightly gripped between said slide I05 and the stationary finger I01. As the carriage 56 completes its movement a spring I08, which is located in a well in the end of said slide I05 and butts against the plate I09 held by the carriage 56. is compressed. A pin H0 in the top of the slide I05 engages the end of the slot in the plate I06 and keeps the slide I05 in place when it does not contact the leads 20 and 2|. The slide I05 and the stationary finger I01 engage the leads 20 and 2| directly above the grooves therein so as to eliminate any possibility of said leads 20 and 2| being bent during the mounting operation. and they accurately position said leads 20 and 2| since finger I01 is mounted on an arm III extending from a stationary part (not shown) of the machine.

5 The limit of motion of the carriage 55 is reached when the taut section of the filament wire 53 is located within the grooves of the leads 20 and 2|, as shown in Fig. 5b, and the stop screw M2 on the bracket ||3 extending rearwardly of the carriage 56 engages the standard 61. The above apparatus is particularly well suited to the mounting of very short filaments in that very accurate placement of the leads 20 and 2| is provided for. and in that comparatively great working clearance is provided about the filament wire 53 and lead ends as the filament wire presenting apparatus is located on the outer sides of the loads 20 and 2|.

The filament wire 53 is fastened to the leads 20 and 2| by a further closing movement of the jaws |0l and I02 (Figs. 4 and 8) which now occurs and which causes the raised portion N4 of the block I04 of jaw I02 to be pressed into the grooved area of both leads 20 and 2| so that the metal of said loads 20 and 2| is squeezed from position and flows about the filament wire 53. The block IIS on jaw |0| engages the opposite side of said leads 20 and 2| during the squeezing operation and prevents said leads 2'] and 2| from being moved out of position. Each lea! end now appears as in Fig. 5b. The jaws IN and I02. which are both pivotally mounted on the pin IIB extending from the slide are actuated in the above manner by the upward movement of the sub-slide 8 which forces the wedge shaped end thereof to the limit of its movement between the rollers II9 on the lower end of the jaws IN and I02. The sub-slide H8 is in turn operated by cam actuated means (not shown) which is a part of the mount making machine and which is connected thereto by the rod I and link I2I.

Although the filament Wire 53 is now securely fastened to the leads 20 and 2I, said wire 53 is still part of the main body thereof and must be severed therefrom. The severing operation occurs immediately after the filament wire 53 is attached to the leads 20 and 2| and is the function of the circular knives I22 and I23 (Fig. 4) which are located relatively near the lead 20 and which are rotated in opposite directions so as to cause their cutting edges I24 and I25 to engage said wire 53. The knives I22 and I23 rotate about a common center since the former is mounted on a tubular shaft I26 extending through the bracket 90 and the latter is mounted on the shaft I21 located within shaft I26, and are actuated by the particular rotative movements produced in the shafts I26 and I21 by the arms I28-I29 and links I30I3I which connect them to the rod I32. The shaft I26 terminates at its left end (Fig. 4) at the arm I28, while the shaft I21 terminates at the arm I29, both shafts being shown broken away at the face of cutter I22 for the sake of clearness. The expansion force of the spring I33 which is located between arms I28 and I29 holds the shafts I26 and I21 so that the adjacent faces of the knives I22 and I23 are in contact with each other at all times. Cam actuated means (not shown), a part of the mount making machine, provides for the movement of the rod I32 by raising the rod I34 (Figs. 6 and '7) so that the shoe I35 engages the roller I36 on the lower end of said rod I32 and raises the said rod I32. A spring I31 located between the larger lower end of the rod I32 and an arm of the bracket I38 which holds said rod I32 in position and which is attached to the under side of the carriage 56 is compressed during the above operation.

The succeeding operations of the apparatus at station B separate said apparatus from the leads 20 and 2| and the section of filament wire 53' mounted thereon and include an opening movement of the jaws 62 and 63, and backward move ment of the carriage 56, and opening and downward movements by the positioning and clampings jaws IIlI and I02. The jaws 62 and 63 are opened by a movement of the arm 16, pin 11 and sub-slide 13 toward the left (Fig. 4) which movement carries the pin 11 away from the angular faces 81 of the jaws 62 and 63 and the studs I39 into engagement with the angular back portions I40 of said jaws 62 and 63. The arm 16 and subslide 13 do not move to such an extent as to change the position of the slide 64 and the jaws 62 and 63 but separate said jaws 62 and 63 so that the carriage 56 can be moved back b motion of. the lever 96 until all parts thereon are free of the leads 20 and 2I. The positioning and clamping jaws IIlI and I02 are opened and lowered by a downward movement of the sub-slide II8 which carries the upper end thereof from between the rollers II9 allowing the contraction of spring I4I to open said jaws IM and I02 and which brings the shoulder I42 thereon against the plate I43 (as shown in the sectional view of this apparatus in Fig. 9) causing said plate I43, slide H1 and the jaws IOI and I02 to move therewith. At the particular moment the shoulder I42 on the sub-slide II8 engages the plate I43 illustrated in Fig. 9, the slide H1 is held at its upper limit of movement within the ways in the standard I44 by the expansion force of the spring I45 (Fig. 9) which is located in a well in said slide H1 and butts against the piston I46 restin on the projection of the standard I44. The upper position of the slide I I1 is determined by the engagement of the portion I41 of the slide 1 extending through an opening in the standard I44 with the stop screw I48 held by said standard I44.

It is often desirable to operate the mounting machine as a whole although no stem or only an incomplete or otherwise defective stem is being presented at station B and there is, therefore, no need for presenting the filament wire 53 at said station. Means, such as that shown in combination with the apparatus at station B, is therefore preferably provided to prevent said apparatus from feeding filament wire 53 although the actuating means for it is operated by the mountint: machine as usual. The above means is operated by the solenoid I49 (Fig. 6) which is mounted on the standard 61 and which is under the control of an electrical circuit completed either by a manually operated switch (not shown or by a movable finger (not shown) located at station A. which finger is caused to close said circuit when a stem is located at said station. The finger can be so located that a defective stem, a stem with only one lead wire, for instance, will not actuate it sufficiently to close the control circuit.

Should the control circuit be open, the expansion force of the spring I50, which is located between the bracket I5l on the standard 61 and the collar I52 on rod I53, will cause said rod I53 to drop to the lower limit of its movement as the armature of the solenoid I49, which is attached to the lower end thereof, will have no effect thereon. The top end of the rod I53 is then below the path of travel of the downwardly projecting end portion I54 of the bar I55 and the bar I55 which is mounted in slide ways in the carriage 56 will be free to move forward in said ways until it is located in the path of movement of the operating arm 16 for the jaws 62 and 63. This movement of the bar I55 does not take place however until the carriage 56 is moved toward the stern I9 in delivering the filament wire 53 to the stem I9 now at station B, as the pawl I56 which is pivoted on the pin I51 extending from the carriage 56 strikes the lug I58 attached to the standard 61 allowing the biasing force of the spring I59 to move the rod I55 to that position. The pawl I56 is at other times biased by the spring I60 so that it is located in the notch I6I in the rod I55 and prevents any movement of said rod I55 with respect to the carriage 56. The rod I55 does not disturb the present cycle of operations of the apparatus while it is located in this position since the arm 16 is still allowed sufiicient freedom of movement to open the jaws 62 and 63 after the filament wire 53, it now carries, is attached to the leads 20 and 2I of the stem I9 but is so D0- sitioned that it is engaged by the stop screw I62 on said arm 18 and does prevent the movement thereof which causes said jaws 62 and 63 to grip and draw out filament wire 53 in the succeeding cycle of operation. The biasing force of the spring BI of the operating means for the arm then can not operate said means as directed by the lever 82.

The bar I55 is not, of course, engaged until the carriage 56 moves back from the stem I9 and remains engaged until the arm 16 and jaws 62 and 63 return to their opposite limit of movement in preparation for the forward movement of the carriage 56. At this time the head I6 of the carrier I which was located at station A and which has caused the interruption in the feeding of filament wire 53 will have advanced to station B and a second head I6 and stem I9 will have advanced to station A. If the present stem I9 (at station A) is defective and the control circuit to the solenoid I49 is not closed, the position of the bar I55 will remain the same and no filament wire 53 will be presented at station E in the next succeeding cycle of operation of the apparatus as well as in the present cycle now partly completed. If the stem I9 is such that circuit is closed to the solenoid I49, the armature and the rod I53 will be raised into the path of the downwardly extending end portion I54 of the bar I55 during the forward movement of the carriage 56, and said bar I55 will be drawn back in said carriage 56 so as to be out of the path of movement of arm by said movement. The pawl I56 can then swing up into the notch I6I and hold the bar I55 in the retracted position as the carriage 56 moves back and starts the next cycle of operation. The stem I9 indexed from station E has mounted thereon a length 53' of the filament wire 53 and is in this form commonly referred to as a mount.

The operations of the mounting apparatus are under constant observation, as the mount indexed beyond station B is subjected to a test procedure which includes operations at both stations C and D. The first test operation, which takes place at station C, includes the placing of the filamentto-lead connections under tension in an attempt to separate the filament and the leads. Although this operation tests the mechanical strength of the filament-to-lead connections, it is also effective in discovering defective high resistance connections, as nearly all such connections are loose or of low mechanical strength. The second test operation, which takes place at station D, includes the connection of the leads and filament in an electrical circuit and the testing of said circuit to discover if the mount has the proper electrical resistance and is therefore properly made.

The improperly constructed mounts which are all of higher than normal resistance are discharged from the heads I6 of the carrier I5 and are moved away from the mounting apparatus by a conveyor. Both test operations are dependent to a certain extent on each other, the first operation depending on the discovery and the discharge of partially defective mounts which are rendered entirely defective thereby, and the second operation depending on the discovery of certain defective mounts which could in certain specific instances pass said operation. The first test operation separates the filament from one of the leads when a filament-to-lead connection is insecure and allows the use of less sensitive apparatus for the second test operation if desired, as said apparatus need only discover if the circuit through the mount is complete. The first test operation also discovers certain filament-to-lead connections which have only slightly more than normal resistance and are difiicult for the second test apparatus to discover.

The test operation occurring at station C is the result of an outward movement of the finger I63 (Figs. 1 and 10), which carries it between the leads and 21 at a point near the stem I9, and a downward movement thereof, which forces it against the angular portions I64 (Fig. 2) of said leads 20 and Zl. The finger I63 is in effect a part of arm I55 as it is pivotally mounted on the pin I86 in the arm which is, in turn, pivotally mounted on the pin I61 held by lever I68 and is actuated through the movements of said lever I68 about the pin I05 helo. by the standard I10.

' At the start or the cycle ol' operation, the arm I65,

which is biased by the spring I1I extending between the pm In and a post on said arm I55, is positioned with respect to lever I68 by the engagement oi the stop screw I12 with the back edge thereol; and the movement or the lever I65 which is operated through the rod 113 by cam a0- tuated means \not shown) a part of the mounting machine, causes a similar movement of the ringer I53. '1'116 arin I55 remains in this position until the ringer Inc is located between the leads 20 and 2| whereupon a portion of it engages the head of the stop pin H4 and the further movement of lever 168 causes the arm I65 to turn about the pm lol and the ringer I63 to swing down against the leads Zn and 21. The stop pin I14 is located within an opening in the sleeve I15 which 15 attached to the arm I16 extending irom the standard and serves as a stationary rest for the arm until the pressure of the finger I83 increases to apredetermined value. Aiter the pressure reaches this point, the stop pin I14 is pushed back in the sleeve I15 and so as to compress the spring 111 and prevent any further increase in pressure on the leads 2!] and 2| by permitting the arm I55 to turn about pin I51. The effect 01 this operation is to pry the leads 20 and ZI apart by pulling a lead from the filament if one of the connections thereto is not tight and secure. The test apparatus is particularly useful as it breaks the circuit from one lead to the other in instances where current can flow satisfactorily through said mount at the time it is manufactured but which will prove unsatisfactory when used. Means are provided for changing the position of the sleeve I15 and the compression of the spring I11 to provide for the adjustment of the pressure exerted by the finger I63. The cycle of operations of this portion of the test apparatus is completed by the reverse movement of lever I68 which lifts finger I63 from the leads 28 and 2I and then swings it to one side of the mount.

The test operation taking place at station D starts with a movement of the slide I18 which carries the spring contacts I19-I80 (Figs. 1 and 11) into engagement with the leads 20 and ZI and is produced by a corresponding movement of the defective mount conveyor I8I which causes the collar I82 on shaft I83 to butt against and push said slide I18. The slide I18 is normally located out of the path or movement of the mount (that is, to the right of the position in which it is shown in Fig. 1) in the ways in the stationary portion I84 of the machine and, in moving, causes the spring I85 which extends between posts held by said slide I18 and the stationary portion I84 of the machine to be stretched. A slot in the slide I18 prevents the spring post attached to the stationary portion I84 of the machine from interfering with the movements thereof.

The movement of the defective stem conveyor I8I is produced through cam actuated means (not shown), a part of the mount making machine, which engages the supporting bracket I86 for shaft I83 and, in moving said shaft I83, advances one of the holders I81 on the chain I88 engaging the sprocket I89 on the upper end of the shaft I83 to a position below the flange of the stem tube I9 of the mount. The spring contacts I19 and I80, which are insulated. from the slide I18, connect the leads 20 and 2I and the filament 53 in a circuit including the coil I90 of the relay I9I which is so proportioned and adjusted that the current conducted through an acceptable mount causes the armature I92 of said relay I9I to be repositioned. If the mount is not acceptable, that is if one of the lead-to-filament connections is imperfect or if the mount is defective in any way effecting its electrical resistance, insufficient current passes through the relay I9I and the position of the armature I92 is not affected.

Th relay I9I can be so accurately adjusted as to be actuated by mounts having a lead-to-filament connection of only slightly more than normal resistance but need not be so adjusted in every instance as, ordinarily, the mounts that are defective in this particular have the filament separated entirely from one of the leads 20 and 2I due to the operations of the apparatus at station C. Assuming that the present mount is acceptable, the armature I92 of relay I9I is moved away from the contact I93 so that the electrical circuit controlled thereby is ineffective in causing operation of other portions of the apparatus and the defective mount conveyor I8I completes its cycle of operation by moving back away from the mount which is then indexed from station D. The mount is therefore carried from station D by the regular indexing movements of the head I6 and is removed either manually or automatically from the mount making machine at a succeeding station.

If the mount is not acceptable, another chain of operations occurs before the defective mount conveyor I8I is moved back from station D, which operations include the lighting of th indicator lamp I93 (Fig. 11) and the release of the mount from the head I (Figs. 1 and 2) so that it drops into the holder I01 (Figs. 1 and 11) of the conveyor I8I and is moved back therewith. This chain of operations is started by the closing of the switch I94 comprised of the stationary and movable contacts I95 and I90 which are connected in a circuit including the armature I92 and contact I93 of the relay I9I, the indicator lamp I93 and the solenoids I91 and I98 (see Figs. 1 and 11) The said switch I94 is closed for an interval between each index of the head I0 by cam actuated means (not shown), a portion of the mounting machine. The continuous circuit formed when both relay I9I and switch I94 are closed causes solenoid I91 to move its armature I99 so that the lever 200, which is located adjacent the upper extremity of the head, engages and turns the jaw release lever 29 (Figs. 2 and. 11). This causes the jaws I1-I8 and 22-23 to open and release the mount. The continuous circuit also causes solenoid I90 to move the armature I, thereby turning the lever 202 (Figs. 1 and 11) so that the pin 203 is positioned in the offset portion 204 of the slot 205 in said lever 202. The back movement of the defective mount conveyor IBI occurs before the contacts I95 and I96 are separated and the lever 206 which holds the pin 203 is caused to turn about the shaft I83 so that the pawl 201 turns the ratchet wheel 208 attached to said shaft I83 causing the defective mount conveyor I8I to be indexed. In this way th holder I81 of said conveyor I8I receiving the defective mount is indexed along and the next holder thereof is brought into position to receive a mount. The contacts I and I96 are separated before the head I6 is indexed so that the apparatus is again subject to the test circuit established through a mount in the next cycle of operation.

The test apparatus disclosed is particularly effective in the combination shown, in that the filament 53 is very probably of extremely small size, .0006 to .001 inch diameter, for instance, and therefore of low strength, and in that the filament-to-lead connections of the mount manufactured in this instance must hav exceptionally good electrical conductive qualities. The test apparatus is also particularly well adapted to test mounts having filament-to-lead connections of the type disclosed.

The test apparatus disclosed herein is claimed in my copending application Serial No. 474,574 filed February 3, 1943 which is a continuation-inpart of the present application.

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

1. In a machine of the character described, the combination of a movable carrier having stem holding heads each constructed and arranged to hold a stem with a pair of metal leads extending therefrom, apparatus located along the path of movement of the heads for making a groove in each of the leads, apparatus farther along said path for placing portions of a filamentary wire in the grooves in the metal leads and thereafter working portions of said metal leads adjacent the grooves over said filamentary wire to securely fasten the said wire thereto.

2. In a machine of the character described, the combination of a movable carrier having stem holding heads each constructed and arranged to hold a stem with a pair of metal leads extending therefrom, apparatus located at a station along the path of movement of the heads for making a groove in each of the leads and for trimming said leads to length at points beyond the grooves, apparatus at another station farther along said path for placing portions of a filamentary wire in the grooves in the metal leads and thereafter workin portions of said metal leads adjacent the grooves over said filamentary wire to securely fasten the said wire thereto.

3. In a machine of the character described, the combination of a movable carrier having stem holding heads each constructed and arranged to hold a stem with a pair of metal leads extending therefrom, apparatus located at a station along the path of movement of the heads comprising a pair of blocks having coacting shearing edges, a finger located opposite one of said blocks, means for causing a relative movement between the block to trim the lead to length and position one of said blocks against the end portion of the leads and causing said finger to hold said leads against the said block and means engaging the opposite sides of said leads from the said block for making grooves therein, apparatus at another station farther along said path for placing portions of a filamentary wire in the grooves in the metal leads and thereafter working portions of said metal leads adjacent the grooves over said filamentary wire to securely fasten the said \vire thereto.

4. In a machine of the character described, the combination of a movable carrier having stem holding heads each constructed and arranged to hold a stem with a pair of metal leads extending therefrom, apparatus located along the path of movement of the heads comprising means for 40. Willi; wumuuu holding the end portions of said leads in a definite position, a roll having a V-shaped edge, and means for moving said roll transversely of said leads to cause the edge thereof to engage and form a therefrom, apparatus located along the path of movement of the heads for making a groove in each of the leads, apparatus farther along said path comprising a carriage adapted to move to groove in the end portion of each of the leads, and from operative relation to the head, means apparatus farther along said path for placing mounted on said carriage for holding a filaportions of a filamentary wire in the grooves in mentary wire, a slide mounted in ways in the carthe metal leads and thereafter working portions riage adjacent said last mentioned means, jaws of said metal leads adjacent the grooves over said mounted on said slide, a sub-slide mounted in filamentary wire to securely fasten the said wire 10 ways in said slide, means engaging the slide and thereto, sub-slide for limiting the movements of th lat- 5. In a machine of the character described, the ter with respect to the former, means engaging combination of a movable carrier having stem the sub-slide and the jaws for causing said jaws holding heads each constructed and arranged to to close or open at the limits of the motion of the hold a stem with a pair of metal leads extending said sub-slide, means for moving the sub-slide in therefrom, apparatus located at a station along one direction to cause the jaws to grip a portion the path of movement of the heads comprising a of the filamentary wire extending beyond the pair of blocks having coacting shearing edges, a holding means and movement of the slide and jaws finger located opposite one of said blocks, means to draw a portion of the filamentary wire therefor causing a relative movement between the from and for moving the sub-slide at a later in blocks to trim the leads to length and position one terval for opening the jaws and returning said of said blocks against the end portion of the leads sub-slide and slide to their original position, and causing said finger to hold said leads against means for moving the carriage to cause the filathe said block, a roll having a V-shaped edge and mentary wire to be placed in the grooves in the means for moving said roll transversely of said leads, and means for working portions of the leads to cause the edge thereof to engage and form metal leads adjacent the grooves over the filaa groove in the side of each lead opposite from mentary wire to securely fasten said wire thereto. the said block, apparatus at another station far- 9. In a machine of the character described, the ther along said path for placing portions of a combination of a movable carrier having stem filamentary wire in the grooves in the metal leads holding heads each constructed and arranged to and thereafter working portions of said metal hold a stem with a pair of metal leads extending leads adjacent the grooves over said filamentary therefrom, apparatus located along the path of wire to securely fasten the said wire thereto. movement of the heads for making a groove in 6. In a machine of the character described, each of the leads, apparatus farther along said the combination of a movable carrier having stem path comprising a carriage adapted to move to holding heads each constructed and arranged to and from operative relation to the head, means hold a stem with a pair of metal leads extending mounted on said carriage for holdin a filatherefrom, apparatus located along the path of mentary wire, movable jaws mounted adjacent movement of the heads for making a groove in said last mentioned means on said carriage, means each of the leads, apparatus farther along said for causing said jaws to grip a portion of the path comprising means for holding spaced porfilamentary wire extending beyond the holding tions of a filamentary wire, a carriage for supmeans and for moving said jaws away from said porting said means adapted to move the said holding means to draw a portion of the fila means to and from operative relation to the head, mentary wire therefrom, means for moving the means for moving the carriage to cause the fi1a 5 carriage to cause the filamentary wire to be placed mentary wire to be placed in the grooves in the in the grooves in the leads, means for working leads and means for working portions of the metal portions of the metal leads adjacent the grooves leads adjacent the grooves over the filamentary over the filamentary wire to securely fasten said wire to securely fasten said wire thereto. wire thereto, and independently operable means "I. In a machine of the character described, the for preventing the full return movement of the combination of a movable carrier having stem jaws to prevent said jaws from gripping and poholding heads each constructed and arranged to sitioning the filamentary wire in the succeedin hold a stem with a pair of metal leads extending cycle of operation, therefrom, apparatus located along the path 0f 10. In amachine of the character described, the movement of the heads for making a groove in combination with a movable carrier having stem each of the leads, apparatus farther along said holding heads thereon each constructed and arpath comprising a carriage adapted to move to ranged to hold a stem with a pair of spaced leads d from operative relation to the head, means extending therefrom, of filament mounting apmounted on said car iage fo holding a p ratus comprising a carriage member located mentary wire, movable jaws mounted adjacent adjacent the path of travel of said heads, means said last mentioned means on said carriage, means on said carriage for holding a supply of filament for causing said jaws to grip a portion of the filawire, gripping means on said carriage for holding mentary wire extending beyond the holding means taut an end portion of said filament wire, and and for moving said jaws away from said holding means for bodily moving said carriage toward one means to draw a portion of the filamentary wire of said heads to carry the taut end portion of therefrom, means for moving the carriage to filament wire directly against and across the leads cause the filamentary wire to be placed in the of astem in said head. grooves in the leads, and means for working por- 11. In a machine of the character described, tions of the metal leads adjacent the grooves over the combination with a movable carrier having the filamentary wire to securely fasten said Wire 7 stem holding heads thereon each constructed t t and arranged to hold a stem with a pair of 8. In a machine of the character described, the spaced leads extending therefrom, of filament combination of a movable carrier having stern mounting apparatus comprising a carriage holding heads each constructed and arranged to member located adjacent the path of travel of hold a stem with a pair of metal leads extending said heads, means on said carriage for holding a supply of filament wire, gripping means on said carriage for holding taut an end portion of said filament wire, jaw members adjacent said carriage, means for bodily moving said carriage toward one of said heads to carry the taut end portion of filament wire directly against and across the leads 01 a stem in said head, and means 101' subsequently closing said jaw members against said leads to secure the filament thereto.

12. In a machine of the character described, the combination with a movable carrier having stem holding heads thereon each constructed and arranged to hold a stem with a pair of spaced leads extending therefrom, of filament mounting apparatus comprising a carriage member located adjacent the path of travel or said heads, means on said carriage for holding a supply of filament wire, gripping means on said carriage for holding taut an end portion of said filament wire, jaw members adjacent said carriage, knife means on said carriage, means for bodily moving said carriage toward one of said heads to carry the taut end portion of filament wire directly against and across the leads of a stem in said head, and means for sunsequently actuating said knil'e means to sever the secured taut end portion of the filament wire from the remainder thereof.

13. In a machine of the character described, the combination with a movable carrier having stem holding heads thereon each constructed and arranged to hold a stem with a pair of spaced leads extending therefrom, oi filament mounting apparatus comprising a carriage member located adjacent the path of travel of said heads, means on said carriage for holding a supply of filament wire, gripping means on said carriage for holding taut an end portion of said filament wire, jaw members adjacent said carriage, the said gripping means being spaced sufiiciently far apart that the free portion of taut wire therebetween is longer than the spacing of the leads, means for bodily moving said carriage toward one of said heads to carry the taut end portion of filament wire directly against and across the leads of a stem in said head, and means for subsequently closing said jaw members against said leads to secure the filament thereto.

14. In a machine of the character described, the combination with a movable carrier having stern holding heads thereon each constructed and arranged to hold a stem with a pair of leads depending vertically therefrom, of filament mounting apparatus comprising a carriage located adjacent the path of travel of said heads, means on said carriage lor holding a spool ol filament wire, clamping means on said carriage arranged to resiliently clamp a part of said wire with an end portion projecting therebeyond, a pair of movable jaws spaced horizontally mom said clamping means a distance greater than the spacing of the said leads, means for moving said jaws toward said clamping means to grip said end portion of said wire and for then retracting said jaws to pull a portion of the wire through the clamping means and hold it taut in a horizontal position, and means for bodily moving said carriage toward one of said heads to carry the taut portion of filament Wire directly against and across the leads of a stem in said head.

15. In a device of the character described, mechanism for grooving a pair of vertically extending leads of a stem, comprising a pair of vertically disposed jaws, a positioning finger at the upper end of one of said jaws extending laterally toward the other jaw and having notches in its front edge adapted to engage the said leads and space them a definite distance apart, a block member on said one jaw under said positioning finger providing a vertical face for backing portions of said leads, a holding linger on said other jaw extending laterally toward said one jaw and arranged to clamp said leads securely against the said face of said block member adjacent the lower edge of said face, a second block member carried by said other jaw under said holding finger and arranged to pass across tip portions of said leads projecting below the first-mentioned block member, the said block members constituting shear means for severing the said tip portions of the leads, and a disc-shaped roll member having a sharp periphery arranged to be pressed against portions of said leads backed by said first-mentioned block member above said holding finger to form horizontal grooves in said leads.

JOHN FLAWS, Jn.