US3000407A - Electric lamp mount making method and apparatus - Google Patents

Description

Sept. 19, 1961 J. w. ANTHONY ETAL 3,000,407

ELECTRIC LAMP MOUNT MAKING METHOD AND APPARATUS 5 Sheets-Sheet 1 Filed May 5, 1958 n h A mww hmrdm @Q T JN p 1961 J. w. ANTHONY ETAL 3,000,407

ELECTRIC LAMP MOUNT MAKING METHOD AND APPARATUS Filed May 5, 1958 3 Sheets-Sheet 3 5& 63 6 Inven tofs: do hm W. Arvthong,

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Patented Sept. 19, 1961 3,000,407 ELECTRIC LAB [P MOUNT MAKING METHOD AND APPARATUS John W. Anthony and Norman W. Lewis, Cleveland,

Ohio, assignors to General Electric Company, a corporation of New York Filed May 5, 1958, Ser. No. 732,957 Claims. (Cl. 14071.6)

Our invention relates generally to a method and apparatus for making mounts for electric lamps.

There has recently been developed an electric incandescent lamp mount embodying a so-called vertical or axial filament wherein a coiled-coil filament is arranged with its axis substantially concident or parallel to the longitudinal or vertical axis of the mount whereby the filament is capable of operation at increased efficiency and life as compared with similar filaments arranged horizontally or laterally of the mount axis. The mount comprises generally a conventional stern tube arranged to be vertically disposed with a press portion at its lower end from which extends axially a glass arbor having a button portion at its lower end. A pair of lead wires extend generally downward from the press portion along opposite sides of the stem or mount axis and for different distances beyond the arbor button with their free end portions bent laterally toward said axis where they are secured to the coiled-coil filament which extends along said axis between said end portions of the leads. In order to secure the leads against distortion upon shock or vibration, they are braced by anchor or tie Wires extending from the button on said arbor. One of the tie wires extends horizontally to the shorter lead wire and has its end formed into a loop embracing that lead wire, the other (longer) tie wire extends downwardly at an acute angle from the button and terminates in a loop embracing the longer lead wire at a location below the level of the button and at a point more nearly midway of its length whereby to improve the strength of the mount. Such a structure is disclosed and claimed in patent application Serial No. 568,218 of Paul Jordan filed February 28, 1956, now abandoned and assigned to the same assignee as the present invention.

The assembly of the mount, particularly that portion involving attachment of the tie wire to the long lead wire, is complicated by the lack of space available to accommodate the necessary tools involved in the formation of the mount and making it rather impracticable to provide the necessary equipment for curling the angularly extending tie wire about the long lead wire. It is therefore an object of our invention to provide a unique method and apparatus for effecting attachment of the tie wire to the long lead wire.

Generally speaking, we attain the aforesaid object by leaving the longer tie wire in its original position wherein it extends horizontally outward from the button a substantial distance beyond the associated long lead wire, and we temporarily bend the lead wire away from the axis of the mount, preferably about its point of emergence from the stem press, to bring it in proximity to the free end of the tie wire, whereupon the said free end of the tie wire is curled to form a loop after which the tie wire is bent downwardly while the lead wire is simultaneously bent back to its original position closer to the mount axis. In that way, it is possible to employ essentially standard curling mechanism of a type heretofore employed in the art with the addition of a minimum of operating elements to effect the temporary displacement and subsequent re-forrning of the lead Wire.

Further features and advantages of our invention will appear from the following detailed description of a species thereof and from the drawings wherein:

FIG. 1 is an elevation of the partially formed mount prior to attachment of the tie wires to the lead wires in accordance with the present invention;

FIG. 2 is a similar elevation of the mount with associated mechanism in operative relation thereto and illustrating the curling of the ends of the tie wires about the lead wires with the longer lead wire temporarily deformed to be received in the loop formed in the end of its associated tie wire;

FIG. 3 is a similar elevation of the mount with associated operating mechanisms and illustrating the re-forming of the mount including return of the longer lead wire to its original position while bending the associated tie Wire downwardly from the horizontal;

FIG. 4 is an exploded perspective View corresponding to FIG. 3 and on an enlarged scale;

FIG. 5 is a fragmentary plan view of a mount making machine showing the two stations occupied by the tie wire curling and the mount final positioning or re-forming devices;

FIG. 6 is a side elevation, partly in section, of the curling mechanism at station A in FIG. 5 and as viewed along the line 6-6 in FIG. 5; Y

FIG. 7 is a fragmentary perspective view of the curling mechanism at the completion of its operating cycle;

FIG. 8 is a horizontal section of a portion of the curling mechanism along the line 8-8 in FIG. 6;

FIG. 9 is a side elevation of the mount re-forrning or final positioning mechanism at station B in FIG. 5;

FIG. 10 is a plan view of the mount re-forming mechanism showing the end of the mount therein and at the final moment of the last re-forming operation;

FIG. 11 is a front elevation of the mount re-forming mechanism with the tool supporting arms and certain other parts at the front of the mount omitted for clarity; and

FIG. 12 is a perspective view of the main driving cams for the curling and mount re-forming mechanisms.

Referring to FIG. 1 of the drawings, the partially completed mount comprises a glass stem tube or flare 1 with coaxially arranged exhaust tube 2 and arbor rod 3 sealed and pinched together to form a press portion 4 with an exhaust opening 5 therethrough communicating with the exhaust tube 2. A pair of lead wires 9 and 10 have portions thereof sealed in said press portion 4 and extend generally downward from said press portion along opposite sides of the axis 11 of said mount and for diiferent distances, the end portions 12 and 13 thereof being bent to extend substantially horizontally toward said axis 11 where they are clamped about the ends of a coiled (or coiledcoil) filament 14 extending generally along said axis. As herein illustrated, the relaxed length of the filament coil 14 is greater than the distance between the lead wire end portions 12 and 1'3 so that the filament is somewhat bowed or distorted. A pair of anchor or tie wires 15 and 16 extend horizontally from a button 17 at the end of arbor 3 at acute angles to the vertical plane including the lead wires 9, 10 and mount axis 11, as best seen by the dot-dash lines in FIG. 8. The tie wire 15 is longer than wire 16 in order that, in the finished mount, it may extend downwardly at an acute angle to the mount axis 11 as shown in FIG. 3. The lead Wires 9 and 10 are anchored to the respective tie wires 15 and 16 by a loop 18 in the end of each tie wire.

In accordance with the present invention, the curling of the loop 18 in tie wire 15 about the lead wire 9 is performed by a curling die 19 with the tie wire 15 in its horizontal position (FIG. 2) and the lead wire 9 bent outwardly away from the axis 11 to bring a portion thereof to a position adjacent the end of the tie Wire 15. The tungsten filament coil 14 is of sutficient strength and resiliency to withstand the stretching occasioned by bending of the lead wire without taking a permanent set. After the curling of loop 18 in tie wire 15 about lead wire 9, the said tie wire 15 is bent down to the position shown in FIG. 3 while the lead wire 9 is bent back to its original position to thereby bring the loop 18 into engagement with a portion of the lead wire 9 substantially closer to its free end 12 to provide substantially greater strength and resistance to distortion of the mount under shock or vibration.

The lead wire 19 is also anchored to tie wire 16 by the loop 18 formed at the end thereof by curling die 20, and the free end portions 12 and 13 of the respective lead wires are bent in opposite directions to stretch the filament 14 and place it under tension with a definite predetermined pitch. Prior to the curling of the loops 18 in the tie wires 15 and 16, the lead wires 9 and 10 are bent forwardly (as viewed in FIGS. 1 to '3 and as shown in FIG. 6) to bring them into register with the ends of the angularly arranged tie wires, and the leads, together with the tie wires are ultimately bent back into substantially a common plane passing through the mount axis 11. The reason for the initial angular arrangement of the tie wires is to afford clearance of the curling dies 19 and 20 from the arbor 3 during the horizontal reciprocation of the dies while forming the loop 18. 7

During the assembly of the mount, it is carried by a head represented at 21 in FIG. and including a pair of jaws 22 (FIG. 2). The machine comprises a plurality of heads 21 mounted on the periphery of a turret (not shown) which indexes the heads in steps to a plurality of stations as is well known in the art, the monut being carried along a circular path of travel 27 with its axis 11 and leads 9 and in a plane tangent to said path. The mount is brought by head 21 to a station A (FIG. 5) at which is located the curling mechanism which is shown also in FIGS. 6, 7 and 8.

The curling mechanism, except for the provision of means for bending the longer lead wire 9 outwardly to the position shown in FIGfZ, is somewhat similar to that disclosed in Patent No. 2,085,578, John Flaws, Jr. The principal operating parts are carried by a bracket frame 23 that is pivoted about a pin 24 carried by a bracket 25 that is fixed to a table 26 (FIG. 5), so that it can be swung crosswise of the path of travel 27 of the mount in head 21. The bracket frame 23 is biased toward the left in FIGS. 5 and 6 by springs 28 connected to a fixed support 29, but can be swung to the right by the downward pull of an actuating rod 30 slidable vertically in a boss 31 on bracket 25 and connected by a link 32 to one arm of a lever 33 having at its other end a roller 34 controlled by the track '35 in a face cam 36 on cam shaft 37. The cam shaft 37 is synchronized with the indexing cam shaft (not shown) so as to make one revolution during each complete indexing cycle of mount holder 21. The rod 30 swings bracket 23 to the right upon engagement of the lower surface of its yoke head 38 with a washer 39 on a fork portion 40 projecting from bracket frame 23. A suitable stop spud 41 is provided to limit movement of bracket frame 23 to the left.

At the time the mount of FIG. 1 is indexed by head 21 to station A, the bracket frame 23 is in a position swung to the right with the actuating rod 30 in its lowermost position, and an arm 44 pivoted on bracket 23 at 45, is at that time swung to the left about its pivot, be ing biased in that direction by a spring 46 connected to the fixed support 29 so as to be held againts a stop stud 47 on said support 29 when bracket 23 swings to the right. The operating parts or tools at the upper ends of bracket 23 and arm 44 are thereby held clear of the path of travel of the mount when it enters station A.

Also at this time, the movable jaws 50 of a tie wire clamp, comprising also fixed jaws 51, are held open; and a tie wire pusher bar 52 is in an advanced position with its forward finger-like ends against upstanding ends of fixed jaws 51. The movable jaws are pivoted on a pin 53 in a portion 54 of bracket 23, and jaws 51 are fixed to said bracket portion 54, whereas pusher bar 52 is slidable in ways therein. These relationships of jaws 51 and pusher bar 52 are maintained by a link rod 55 (FIG. 6) pivotally connected at one end to actuating rod 30 and at its other end to a rod 56 slidable in a guide bore in bracket portion 54. With the actuating rod 30 depressed to hold brackets 23, 54 to the right in FIG. 6, the rod 56 is in a lowered position whereat the cross piece 57 thereon bears against the outer arms of jaws 50 to hold them open against the action of springs 58, and pusher bar 52 is held in its advanced position by a spring 59 housed in a bore in bar 52 and acting against a projection 60* (FIG. 8) fixed to a cover plate 61 secured over the ways for bar 52. The advanced position of bar 52 is due to the fact that, with the rod 56 depressed, a cam portion 62 of said rod 56 is below, and therefore disengaged from, a roller 63 carried by the forked rear end of the bar 52.

As the mount comes to rest at station A, the curling mechanism is actuated by upward movement of the actuating rod 30 to swing the bracket 23 to the left while the arm 44 swings to the right to the position shown in FIG. 6. As the arm 44 is swinging to the right, a pusher plate 65 supported thereby and carrying an auxiliary plate 66 therebelow engages the lead wires 9 and 10 and bends them forward about their point of emergence from the stern press 4 to the position shown by wire 9 in FIG. 6. The lead wires are then engaged by the divergent sides of guide or wedge plates 67 and 68 (FIGS. 7 and 8) carried by the bracket portion 54 and terminating in, V notches 69 to receive the lead wires which are firmly held therein by the pusher plates 65, 66. Due to the shape and location of the guide plates 67 and 68 (FIG. 8) the lead wire 10 is also bent slightly to the right as viewed in FIG. 2 and the lead wire 9 is bent markedly to the left to bring it out adjacent to the end of the longer tie wire 15, the lead wires 9 and 10 being bent about their point of emergence from stem press 4. A supplementary stop stud 47' may be provided on bracket portion 54 to be engaged by arm 44 and prevent it from whipping to the right when bracket 23, 54 is stopped by engagement of stud 41 with bracket 25.

Toward the end of the swinging movement of bracket 23 to the left in FIG. 6, the pusher bar 52 engages the tie wires 15 and 16 and bends them from the position shown in dot-dash lines in FIG. 8 to the position shown in full lines whereby they lie more nearly in a line and across the upper surfaces of the stationary jaws 51 and also across or against the respective lead wires 9 and 1% After the bracket 23 has reached its upright position, with stop stud 41 bearing on bracket 25, the actuating rod 30 continues to move upward to carry link 55 and rod 56 upward, whereby the cross piece 57 on rod 56 moves upwardly away from the ends of jaws 50 to permit them to be closed by springs 58 to clamp the tie wires 15 and 16 against the fixed jaws 51. Also, the pusher bar 52 is retracted to the right in FIG. 6 when the cam 62 on red 56 engages the roller 63 on the end of said bar 52, thereby providing room for the subsequent movement of the curling dies 19, 20. It is also to provide clearance for the curling dies past the arbor button 17, that the leads 9 and 10 and tie wires 15 and 16 are arranged to extend to one side of a plane through the mount axis as shown in FIG. 6.

The pusher plates 65 and 66 are notched'out at 65' (FIG. 5) to provide clearance for a support wire (not shown) extending downward from button 17.

With the lead wires 9 and 10 firmly clamped in the V notches 69 of guide blades 68 and 67 by pusher plates -65 and 66, and the tie wires 15 and 16 firmly clamped by jaws 50 and 51, the free ends of the tie wires are then curled about the lead wires by the curling dies 19 and 20 (FIGS. 5 and 7). The said dies are mounted on the ends of a dovetail slide 70 arranged to slide in ways on bracket portion 54 tangent to the path of travel 27 of the mount. In themselves, the dies are similar to those disclosed in Patents 2,085,578 and 1,907,532 to John Flaws, Jr. Each die 19 and 20 has a sloping face with a hollow or groove therein for engaging the end of the tie wire 15 or 16, as shown in FIG. 7, and progressively bending or curling it as the die moves forward. The sloping face terminates in a semi-circular notch 71 adapted to form the wire into a circular loop around the lead 9 or as the notch comes up to the latter. For reciprocating the slide 70 in its ways on bracket 54, there is a lever with a vertical arm 72 and a lateral arm 73 (FIGS. 6 and 12) pivoted on a stud 74 on bracket portion 54. Its vertical arm 72 is forked to engage around a pivot pin 75 in a clevis on the bottom of slide 70, and its lateral arm 73 is pivoted to the end of a link 7 6' which is pivoted at its other end to an actuating rod 76 (FIG. 12) connected to one arm of a lever 77 carrying a roller 77' on its other arm engaging with a track 78 in cam 79 On shaft 37. The actuating rod 76 is reciprocated by cam 79 to oscillate lever 72, 73 and reciprocate slide 70 thus bringing first one curling die and then the other against the end of its associated tie wire.

During completion of the loop 18 in each tie wire, a slight movement of the leads 9 and 10 is desirable. To permit such movement, the guide blades 67 and 68 are mounted on lugs 80 projecting from separate slide blocks 80 (FIG. 8) movable in ways in the bracket portion 54. The slide blocks 80 are urged apart by an interposed spring 81 and their normal positions are determined by engagement of their ends with stop screws 82 in bracket portions on the ends of a cover plate 83 that retains the slides in their ways. As each die 19 and 20 approaches the end of its curling movement, a screw 84 adjustably secured in the end of the slide 70 engages the aforesaid lug 80' on the slide block 80 carrying the corresponding guide plates 67 or 68 and displaces it slightly inward against spring 81, thus deflecting the lead 9 or 10 in harmony with the movement of the curl or loop 18 as it is formed around the lead wire.

Thereupon, the bracket 23 is swung to the right in FIG. 6 by downward movement of actuating rod 30, and arm 44 swings to the left to thereby remove the operating elements at the upper ends thereof from the vicinity of the mount to permit the mount, now appearing as in FIG. 2, to be indexed away from station A to station B. In the initial stages of downward movement of actuating rod 30, and before the bracket 23 is pivoted, the movable jaws 50 are opened by engagement therewith of cross piece 57 on rod 60 to thereby release the tie wires and 16, the pusher bar 52 also being moved to the left by movement of cam 62 on rod 56 away from (below) roller 63.

At station E, the mount is re-formed and finally positioned to the form shown in FIG. 3. The first operation involves bending the long lead wire 9 about its point of emergence from the stem press 4 back toward the right from the position shown in FIG. 2 and, at the same time, bending the associated tie wire 15 downward so that the loop 18 embraces a portion of the lead 9 about midway between its end leg 12 and its point of emergence from stem press 4 whereby the lead 9 is better braced against distortion by shock or vibration than it would be if the tie wire 15 were to extend horizontally and embrace lead 9 at the level of the button 17. Also, the lead wire 9 and tie wire 15 are bent back toward the vertical plane through mount axis 11 from the positions shown in FIGS. 6 and 8; The bending of the lead 9 is effected by a camming or wedging finger or blade 90 (FIG. 4) which moves endwise toward the mount from the front thereof; an oblique or inclined cam surface 91 at the front of the blade 90 engages the lead 9 and wipes it to one side into a V notch 92 at the terminus of the surface 91 whereby, upon further movement of blade 90, the lead 9 is bent back into the vertical plane through mount axis 11. At the same time, the tie wire 15 is bent downward by the downwardly arcuate end 93 of a Wire finger or needle 94 which moves toward the mount from the rear thereof in a downward arc to engage the tie wire 15 near the button 17. The lead 9 is backed up during the bending thereof by the end of a blade 95 which is moved toward the mount from the back thereof. The tie wire 15 is bent nearer or into the vertical plane through the mount axis 11 by the end of a plate-like finger 96 which is moved toward the mount from the front thereof to clamp the tie wire against the end of an opposing finger 97 which approaches the mount from the rear thereof.

In another operation, the lead wire 10 is bent slightly back to the left from its position in FIG. 2, by the inclined side surface 98 of a wedging blade 99 (FIG. 4) which is moved toward the mount from the front thereof. The lead 10 is also pushed back to the vertical plane through the mount axis 11 by the face of a jaw member 100 at the front of the mount, being gathered into V notches 101 in spaced finger portions of a cooperating jaw member 102 and gripped firmly between said jaws 100 and 102 just above its end extremity 13. At the same time, the long lead 9 is also gripped just above its extremity 12 by a similar cooperating pair of jaws 103 and 104, the jaw 104 having spaced finger portions with V notches 105. Also, the tie wire 16 is bent back nearer the vertical plane through mount axis 11 by the end of a finger plate 106 at the front of the mount and which pushes the wire 16 against a cooperating finger plate 107 which is moved in from in back of the mount.

With the leads 9 and 10 firmly held by the respective pairs of jaws 103-404 and 100--102, the filament 14 is stretched to place it in tension with a definite turns-perinch by bending the lateral end portions 12 and 13 of the leads by means of rod-like fingers 108 which are brought into position from behind the mount.

In order to provide time for bending the long lead wire 9 to its final position before being gripped by the jaws 103104, the operating parts consisting of Wedge blade 90, finger or needle 94 and backing blade 95 are mounted to derive their motion from the mechanism at station A. To that end, the wedge blade 90 is carried by an arm 109 (FIG. 5) which is attached to the portion 54 of bracket 23; and cam finger 94 and backing blade 95 are carried by an arm 111 which is attached to the vertical arm 44. Thereby, just after the mount has been indexed into station B, the Wedge blade 90, cam finger 94 and backing blade 95, which had been held back at opposite sides of the path of movement 27 of the mount during the indexing, are moved into operative relation to the mount by the swinging of the bracket 23 to the left in FIG. 6 about its pivot pin 24 and the swinging of arm 44 to the right about its pivot pin 45.

The operating elements at station B, other than wedge blade 90, finger 94 and backing blade 95, are supported from a bracket 114 (FIGS. 9-11) that is fixed to table 26. Except for the spreader fingers 108, these other operating elements are carried by opposed pairs of upright lever arms or jaws comprising a back pair 115116 and a front pair 117-118. The arms 115116 constitute, in effect, the upper forked arms of a lever having a lower arm 119 and pivoted on a pin 120 in bracket 114. The front pair of arms 117 and 118 are independent members also pivoted on pin 120, the arm 118 being part of a lever having a lower arm 121, and the arm 117 being coupled with arm 118 by a spring 122 extending between arms 117 and 115 so that arm 117 is held to arm 118 by engagement of a stud 123 (FIG. 10) with a boss or finger 124 on arm 118. The pairs of arms 115116 and 117 118 are biased toward each other by the said spring 122 and a similar spring 125 interconnecting arms 116 and 118. The opening and closing of arms 115-116 and 117-118 is controlled by a wedge cam 126 which is in engagement with rollers 127 and 128 at the lower ends of arms 119 and 121. The cam 126 is carried by a block portion 129 at the upper end of a vertically reciprocable connecting rod 130 which is pivotally connected at its lower end to one arm of a lever 131 (FIG. 12) which carries on its other arm a roller 132 which rides in the track 133 of a cam 134 on shaft 37. The block portion 129 is held in proper angular position by a roller 129' (FIG. 11) thereon .engaging in a vertical slot in a wall of bracket 114.

The back tie wire fingers 97 and 107 are carried by the respective back arms 115 and 116 as are the back lead wire clamping jaws 104 and 102 (FIGS. 4 and 11). The front tie wire finger 96 and front lead clamping jaw 103 are carried by front arm 117; and the front tie wire finger 106 and front lead clamping jaw 100 are carried by the front arm 118,

The spreader fingers 108 are mounted on the forwardly extending arms of lever 135 (FIG. 9) which are pivoted on pins 136 in a slide 137 horizontally slidable in ways in an extension 138 of bracket 114. The levers 135 are opened and closed through rollers 139 on the outer ends thereof and held against a Wedge cam 140 by a spring 141. The cam 140 is mounted on a sub-slide 142 which is resiliently coupled to slide 137 by a helical spring 143 and is reciprocated by a rocker lever 144 pivoted on a pin 145 in bracket extension 138. The spring 143 is compressed between a bore in the slide 137 and an end of sub-slide 142. The rocker lever 144 has a forked end engaging with a roller 146 on the end of sub'slide 142 and is operated by a link rod 147 connected to an arm 148 extending from the block 129 on actuating rod 130.

During the indexing of the mount into station B, the working elements thereat are in a retracted position from that shown in FIGS. 9-11, the pairs of arms 115-416 and 117-118 being held in an open position by virtue of the fact that the actuating rod 130 is in a raised position so that the high vertical sides 150 of wedge cam 126 (FIG. 9) are in engagement with rollers 127 and 128. The spreader fingers 108 are also then retracted to the right in FIG. 9 by virtue of the fact that arm 148 on actuating rod 130 is in a raised position holding the rocker lever 144 at a position pivoted clockwise from that shown in FIG. 9, thereby holding the sub-slide 142 to the right which, in turn, holds the main slide 137 to the right through engagement with a stud 151 on said slide 137.

In the operation of the mechanism at station B, the first operation to occur, as described above, is the bending of the long lead wire 9 from the position shown in FIG. 2 to that shown in FIG. 3, together with a bending downward of the associated tie wire 15. These operations are performed by the wedge blade 90 and finger member 94 in conjunction with backing blade 95; and the motions for these elements are derived from the mechanism at station A, the wedge blade 90 being mounted on the arm 109 supported from the bracket 23, 54 at station A, and the finger member 94 and backing blade 95 being mounted on arm 111 which is supported from arm 44 at station A. In the meantime, the actuating rod 130 is moved downward by cam 134 to withdraw the high sides 150 (FIG. 9) of cam 126 from between rollers 127 and 128 to cause the pairs of arms 115-116 and 117- 118 to move toward the closed positions shown in FIGS. 9-11. During this closing movement, the wedge plate 99 on arm 118 engages short lead wire to move it slightly to the left from the position shown in FIG. 2 to that shown in FIG. 3; the cooperating pairs of tie wire fingers 96-97 and 106107 engage the respective tie wires and 16 to bend them nearer to a straight line and to the vertical plane containing the mount axis 11; the long lead 9 is clamped between jaws 103 and 104 (having just previously been pushed back into the vertical plane containing the mount axis 11 by the wedge blade 90); and the short lead 10 is also pushed back into the said vertical plane by jaw 100 and is clamped between that jaw and jaw 102.

Also upon the downward movement of actuating rod 130, rocker lever 144 is oscillated counterclockwise in FIG. 9 to move sub-slide 142 to the left which, through spring 143, carries slide 137 to the left to the position shown in FIG. 9 when a stop stud 155 in a boss or projection 156 on said slide 137 engages a stop projection 157 fixed on bracket extension 138, thereby bringing the ends of the spreader fingers 108 into operative relation to and between the lateral ends 12 and 13 of leads 9 and 10. Upon continued downward movement of actuating rod 130, the rocker 144 continues to move the sub-slide 142 to the left against the spring 143, and the fingers 108 are spread apart when the rollers 139 on levers leave the high sides 158 of wedge cam so that levers 135 are pivoted about the pins 136. The spreading fingers 108 engage the lateral ends 12 and 13 of leads 9 and 10 and bend them in opposite directions to the positions shown in FIG. 3 to thereby place the filament coil 14 in tension with its turns uniformly spaced apart.

In its finally positioned form, the lead wires 9 and 10 of the mount are in a common plane including the mount axis 11, and the filament 14 extends substantially along said axis, and the leads 9 and 10 are braced by the tie wires 15 and 16.

While we have shown and described in detail a preferred embodiment of the invention, it will be evident to those skilled in the art that various modifications, omissions and substitutions may be made without departing from the spirit and scope of the invention as set forth in the appended claims. Thus, for instance, it is feasible in some cases to cause the long lead Wire 9 to be bent back from the position shown in FIG. 2 to that shown in FIG. 3 simply as a result of bending the tie wire 15 downward; in that event the lead 9 is pulled back by the engagement of the hook 18 in tie Wire 15 with the lead 9 during the bending of tie wire 15, and the camming or wedging surface 91 of blade 90 is dispensed with.

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

1. In a mount making machine; holder means for supporting and carrying to a plurality of stations a mount comprising a stem having a vertical axis with a pair of lead-in wires extending generally downward from said stem along opposite sides of said axis and a tie wire anchored in and extending substantially horizontally from a portion of said stem across and substantially beyond one of said lead-in wires; curling mechanism adjacent the path of movement of said holder means at one of said stations comprising a bending member, means mounting said bending member for movement to engage said one lead-in wire and bend it outwardly away from said axis to bring a portion thereof into proximity to the free end of said tie wire, a curling member, and means mounting said curling member for movement into engagement with the free end of the tie wire to curl it about the adjacent portion of said one lead-in wire; re-forming mechanism adjacent the path of movement of said holder means at another station comprising a second bending member, means mounting said second bending member for movement to engage said tie wire and bend it downward to an acute angle to said vertical axis, a third bending member, and means mounting said third bending member for movement to engage and bend said one lead-in wire back toward said vertical axis to approximately its initial position simultaneously with the bending of said tie wire by said second bending member; and means for actuating said curling and re-forming mechanisms in proper time relation.

2. In a mount making machine; holder means for supporting and carrying to a plurality of stations a mount comprising a stem having a vertical axis with a pair of lead-in wires extending generally downward from said stem along opposite sides of said axis and for difierent distances and terminating in lateral end portions extending to the said axis at different elevations where they are secured to the ends of a filament coil extending vertically along said axis, and also comprising a pair of tie wires anchored in an arbor portion depending from said stem and extending substantially horizontally in general- 1y opposite directions across respective ones of said leadin wires, one of said tie wires being longer than the other and extending a substantial distance beyond the associated longer one of said lead-in wires; curling mechanism adjacent the path of travel of said holder means at one of said stations comprising a bending member, means mounting said bending member for movement to engage said longer lead-in wire and bend it outwardly away from said axis to bring a portion thereof into proximity to the free end of said longer tie wire, curling members, and means mounting said curling members for movement into engagement with the free ends of each of said tie wires to curl them about the adjacent portions of the respective lead-in wires; re-forming mechanism adjacent the path of travel of said holder means at another station comprising a second bending member, means mounting said second bending member for movement to engage the longer tie wire and bend it downward to an acute angle with the said stem axis, a third bending member, and means mounting said third bending member for movement to engage the associated longer lead-in wire and bend it back toward said axis to approximately its initial position simultaneously with the bending of said tie wire by said second bending member, clamping members, means mounting said clamping members for movement to grip each lead-in wire at a location just above its lateral end portion, spreader members, and means mountlng said spreader members for movement to engage and spread said lateral end portions of the lead-in wires apart to place the filament coil in tension; and means for actuating said curling and re-iorming mechanisms in proper time relation.

3. In a mount making machine; holder means for supporting and carrying along a path of travel to a plurality of stations a mount comprising a stern having a vertical axis with a pair of lead-in wires extending generally downward from said stem along opposite sides of said axis and in a common vertical plane including said axis and tangent to said path of travel, said lead-in wires extending downward for different distances and terminating in lateral end portions extending to said axis at different elevations where they are secured to the ends of a filament coil extending vertically along said axis, and also comprising a pair of tie wires anchored in an arbor portion depending from said stem and extending substantially horizontally in generally opposite directions at acute angles to said vertical plane and across respective ones of said lead-in wires, one of said tie Wires being substantially longer than the other and extending a substantial distance beyond the associated longer one of said lead-in wires; curling mechanism at one of said stations comprising a bracket member mounted for movement about a horizontal pivot toward said path of travel of the holder means from one side thereof, an upright arm member mounted for movement about a horizontal pivot toward said path of travel from the side thereof opposite said bracket member, pusher blade means mounted on said arm for engaging said leadin wires and bending them out of said vertical plane into proximity to the respective tie Wires upon pivotal movement of said arm member, a wedge plate member mounted on said bracket member for engaging the longer leadin wire and bending it outwardly away from said stem axis to bring a portion thereof into proximity to the free end of said longer tie wire upon pivotal movement of said bracket member, curling dies mounted on said bracket member and operable to curl the free ends of each of the tie wires about the adjacent portions of the respective lead-in wires, and means to effect the pivotal movement of said bracket and arm members and subsequent actuation of said curling dies as aforesaid; re-forming mechanism at another station comprising a wedging blade movable from one side of the path of travel of said holder means toward said path and having a wedging surface engageable with the longer lead-in wire to bend said wire back toward the stem axis to substantially its initial position, and a camming finger means at the opposite side of said path and movable in a downward arc to engage said longer tie wire and bend it downward at an acute angle to said stem axis, said wedging blade and said camming finger being respectively supported from said bracket member and said arm member for actuation thereby.

4. In a mount making machine; holder means for supporting and carrying along a path of travel to a plurality of stations a mount comprising a stem having a vertical axis with a pair of lead-in wires extending generally downward from said stem along opposite sides of said axis and in a common vertical plane including said axis and tangent to said path of travel, said lead-in wires extending down Ward for different distances and terminating in lateral end portions extending to said axis at difierent elevations where they are secured to the ends of a filament coil extending vertically along said axis, and also comprising a pair of tie wires anchored in an arbor portion depending from said stem and extending substantially horizontally in generally opposite directions at acute angles to said vertical plane and across respective ones of said lead-in wires, one of said tie wires being substantially longer than the other and extending a substantial distance beyond the associated longer one of said lead-in wires; curling mechanism at one of said stations comprising a bracket member mounted for movement about a horizontal pivot toward said path of travel of the holder means from one side thereof, an upright arm member mounted for movement about a horizontal pivot toward said path of travel from the side thereof opposite said bracket member, pusher blade means mounted on said am for engaging said leadin Wires and bending them out of said vertical plane into proximity to the respective tie wires upon pivotal movement of said arm member, a wedge plate member mounted on said bracket member for engaging the longer leadin wire and bending it outwardly away from said stem axis to bring a portion thereof into proximity to the free end of said longer tie Wire upon pivotal movement of said bracket member, curling dies mounted on said bracket member and operable to curl the free ends of each of the tie wires about the adjacent portions of the respective lead-in wires, and means to effect the pivotal'movement of said bracket and arm members and subsequent actuation of said curling dies as aforesaid; re-forrning mechanism at another station comprising a wedging blade movable from one side of the path of travel of said holder means toward said path and having a wedging surface terminating in a notch and engageable with the longer lead-in wire to bend said wire back toward the stem axis and also back into the said vertical plane including the stern axis to substantially its initial position, and a camming finger means at the opposite side of said path and movable in a downward arc to engage said longer tie wire and bend it downward at an acute angle to said stem axis, said wedging blade and said camming finger being respectively supported from said bracket member and said arm member for actuation thereby.

5. In a mount making machine; holder means for supporting and carrying along a path of travel to a plurality of stations a mount comprising a stern having a vertical axis with a pair of lead-in wires extending generally downward from said stem along opposite sides of said axis and in a common vertical plane including said axis and tangent to said path of travel, said lead-in wires extending downward for difierent distances and terminating in lateral end portions extending to said axis at diiferent elevations where they are secured to the ends of a filament coil extending vertically along said axis, and also comprising a pair of tie wires anchored in an arbor portion depending from said stem and extending substantially horizontally in generally opposite directions at acute angles to said vertical plane and across respective ones of said lead-in wires, one of said tie wires being sub- '11 stantially longer than the other and extending a substantial distance beyond the associated longer one of said lead-in wires; curling mechanism at one of said stations comprising a bracket member mounted for movement about a horizontal pivot toward said path of travel of the holder means from one side thereof, an upright arm member mounted for movement about a horizontal pivot toward said path of travel from the side thereof opposite said bracket member, pusher blade means mounted on said arm for engaging said lead-in wires and bending them out of said vertical plane into proximity to the respective tie wires upon pivotal movement of said arm member, a wedge plate member mounted on said bracket member for engaging the longer lead-in wire and bending it outwardly away from said stem axis to bring a portion thereof into proximity to'the free end of said longer tie wire upon pivotal movement of said bracket member, curling dies mounted on said bracket member and operable to curl the free ends of each of the tie wires about the adjacent portions of the respective lead-in wires, and means to effect the pivotal movement of said bracket and arm members and subsequent actuation of said curling dies as aforesaid; re-forming mechanism at another station comprising a wedging blade movable from one side of the path of travel of said holder means toward said path and having a wedging surface terminating in a notch and engageable with the longer lead-in wire to bend said wire back toward the stem axis and also back into the said vertical plane including the stem axis to substantially its initial position, and a camming finger means at the opposite side of said path and movable in a downward arc to engage said longer tie wire and bend it downward at an acute angle to said stem axis, said 'wedging blade and said camming finger being respectively supported from said bracket member and said arm member for actuation thereof, said re-forming mechanism further including pairs of cooperating arm members mounted for pivotal movement from retracted positions at opposite sides of said path of travel of the holder means toward said path, means for pivoting said pairs of arm members, cooperating jaws on respective pairs of arm members arranged to grip the respective lead-in wires at locations just above their lateral end portions, the jaws gripping the shorter lead-in wire also serving to bend said wire back into the said vertical plane including the stem axis, a pair of spreader fingers located to one'side of said path of travel of the holder means, means for first moving said fingers toward and across said path of travel and for then spreading said fingers apart to engage and spread apart the lateral end portions of said lead-in wires to place the filament coil in tension; and means vfor actuating said curling and re-forming mechanisms in proper time relation.

References Cited in the file of this patent UNITED STATES PATENTS 1,821,894 Otaka Sept. 1, 1931 1,907,532 Flaws May 9, 1933 2,085,578 Flaws June 29, 1937 2,133,550 Little Oct. 18, 1938 2,613,697 Fantell Oct. 14, 1952 2,820,486 Brent et al. Jan. 21, 1958 2,831,508 Dumond Apr. 2 2, 1958 2,841,189 Meckstroth et a1 July 1, 1958

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