US1210238A - Feeding mechanism for base-making machines and the like. - Google Patents

Description

T. l. WALKER m. A AKEROYD. FEEDING MECHANISM FOR BASE MAKING MACHINES AND THE LIKE.

APPLICATION FILED AUG. I6. 1916. 1,210,238. Patented Dec. 26,1916.-

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I T. I. WALKER & I. A. AKEROYD. FEEDING MECHANISM FOR BASE MAKING MACHINES AND THE LIKE.

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T. I. WALKER 8L1 APPLICATION FILED AUG. 16, 1916.

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. APPLICATION FILED AUG. 16. I916- 1&93, V Patented Dec. 26,1916.

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T. I. WALKER & l. A. AKER0YD1 'FEEDING MECHANISM FOR BASE MAKING MACHINES AND THE'LIKE.

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' T. l. WALKER & I. A. AKEROYD. FEEDING MECHANISM FOR BASE MAKING MACHINES AND THE LIKE.

Patnted Dec. 26,1916.

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ins/ENT RS. THOMAS .Z. ZIADILKEE, rJuLzus A. Axmavr, WfiM THEIR ATTDRNEY.

T. I. WALKER & .I. A. AKEROYD. FEEDING MECHANISM FOR BASE MAKING MACHINES AND THE LIKE.

APPLICATION FILED AUG. I6. I916- I Patented Dec.-26,1916.

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T. I. WALKER & J. A. AKEROYD. F EEDING MECHANISM FOR BASE MAKING MACHINES AND THE LIKE. I

APPLICATION FILED AUG-16,1916- 7 1,21 3. Patented Dec; 26,1916.

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E PATEN FFICE.

THOMAS I. WALKER AND JULIUS A. AKEROYD, OF PROVIDENCE, RHODE ISLAND, ASSIGNORS T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

FEEDING- MECHANISM FOR BASE-MAKING MACHINES AND THE LIKE.

Original application filed February 3, 1911, Serial No. 606,401. Divided and. this application filed August Specification of Letters Patent.

Patented Dec. 26, 1916.

16, 1916. Serial N0. 115,186.

To all whom it may concern:

Be it known that we, THOMAS I. WALKER and JULIUS A. AKEROYD, citizens of the United States, residing at Providence,county of Providence, State of Rhode Island, have invented certain new and useful 1mproveinents in Feeding Mechanisms for Base-Making Machines and the like, of which the following is a specification.

This invention relates more particularly though not exclusively, to machines for making the bases of incandescent lamps, such bases commonly consisting of metallic shell and center contact pieces united by a web of glass or other fusible insulating material.

In its specific application to this use, the invention comprehends improved automatic feeding mechanism for inserting the metallic parts of the base into the molds of a base-forming machine, and other improvements in the mechanism of the machine.

The invention is herein illustrated as embodied in a conventional type of machine for making lamp bases, having particularly utility in its application to a machine employed for that purpose. The invention, however, has application to purposes other than, and is not limited to, the manufacture 'of lamp bases, the feeding mechanism in a generic sense being applicable to feeding articles, other than metallic base parts, for presentation to any desired operation, or for other purposes.

In the drawings: Figure 1 is a plan view showing, in general, a base-making machine embodying one form of the invention; Fig. 2 is a front elevation of the same machine, some of the parts being removed for the sake .of clearness; Fig. 3 is a vertical sectional elevation taken through one of the molds: Fig. 4 is a sectional elevation of a typical form of metallic shell; Fig. 5 is an elevation showing the usual form of center contact or eyelet; Fig. 6 is an end elevation of the machine showing the operating mechanism for the plungers which are employed to insert the metallic parts of the base in the mold; Fig. 7 is a plan of the mechanism shown in Fig. 6; Fig. 8 is an end elevation of the attachment which carries the feeding mechanism; Fig. 9 is adetail showing the driving connection on the main machine for the feeding attachment; Fig. 10 is a section on the line 1010 in Fig. 9 on an enlarged scale; Fig. 11 is a section on the line- 1111 in Fig.8, but on an enlarged scale showing one of the driving ge rs for the feeding mechanism; Fig. 12 is a plan view of the hopper for the base shells; Fig. 13 is a sectional elevation on the line 13-13 of Fig. 12; Fig. 14 is a side elevation of the hopper and hopper driving mechanism for the base shells; Fig. 15 is a sectional elevation of the same; Fig. 16 is a plan view of the guideway, feeding plate and transferring mechanism for the base shells; Fig. 17 is a sectional elevation taken on the line 1717 in Fig.16; Fig. 18 is a plan on an enlarged scale showing the gripping members for the shell transfer devices and the operation thereof.

In the drawings, and referring first more particularly to Figs. 1 and 2, there is shown,

for illustrative purposes, a machine formold carrier, which serves to present them in succession to the several operating mechanisms of the machine. Eachmold comprises a shell holder 2 as shown in Fig. 8, fixed to the head 1 and adapted to receive the shell part 4 of the base (see Fig. 4).

The mold is provided with the vertically movable bottom 3, shaped to receive the bottom of the shell and to hold also 1n appropriate relation thereto the perforated metallic center contact or eyelet 5 shown in Fig. 5. The mold bottom has a depending plunger 6 normally depressed to a fixed position by the spring 7, but adapted to be lifted at the appropriate time by a vertically movable lifting lever (not shown) to expel the completed base from the mold. The lifting lever is actuated by a cam (not shown) on the main power shaft of the machine. The mold carrier is given a step by ste movement by means of the notched wheel 8,

' drawing.

suitable means, so as to present each mold in succession to charging devices for introducing a charge of molten glass into the mold, compressing means for compressing and forming the web of molten glass, a clearing device to clear the perforation of the eyelet and finally to the lifting lever and coiiperating means for removing the completed base from the'mold, all of which mechanisms are well known and are not shown in the The movement is such that the mold carrier is caused to dwell for an interval between each movement to permit the several operations to take place simultaneously upon the bases or base parts in different molds of the series.

Referring now to the automatic feeding mechanism for feeding and inserting the metallic shell parts in appropriate relation in the molds, both the shell and eyelet parts are carried in appropriate supply hoppers from which they are discharged to guideways and presented therein in a continuous series to devices which convey them and place them in the molds.

The present application relates specifically to the mechanism for feeding the metallic shells, the eyelet feeding mechanism bein specificallyv disclosed. in application Serial No. 606,401, filed February 3, 1911, of which the present application is a division.

As shown in Figs. 1, 2 and -8, and more particularly set forth in the above noted application, a supply of eyelet or center contact pieces is contained in a hopper comprising the cylindrical shell 20, and hinged cover 22 through which the supply of eyelets may be replenished from time to time.

The hopper parts are secured to the top 25 of the feeding attachment. In the lower edge of the hopper shell there are provided -a. number of openings (not shown) of a suitable shape and size to permit the discharge of the eyelets right side up from the hopper to a traveling wall, the latter com prising the annular plate 27 encircling the hopper and forming the bottom of an eyelet guideway, the sides of which are formed by the hopper shell on one side and the fixed annular plate 28 on the other. The eyelets are forcibly ejected from the hopper by means (not shown) which agitate the mass and tend to force individual pieces through the openings in the shell. The discharged contact pieces are carried in the guideway partly around the hopper and are. then defiected into a continuation of the guideway, the sides of which are formed by the fixed 6o slotted plate 38 and the bottom by the rotary plate or disk 39. Such guideway continuation lies along the edge of the rotary disk 39 and the latter is in close proximity to the annular feed plate 27 so that the contacts pass from the annular plate to the disk and are carried by the latter-in a continuous series toward the mouth of the guideway, which latter is normally closed by a transfer mechanism. The disk 39 is turned by a mechanism which comprises intermeshing gears 42 and 43. A lateral exit 44 leading to the box or receptacle 45 is provided for taking care of the overflow from the hopper 20. To drive the described feeding mechanism the shaft which carries the beveled pinion 43 has at its opposite end a pinion 46 meshing with the pinion 37, which drives the feed plate 27 and also meshes with the driving pinion 47 (see Fig. 2,), the latter fixed I on the upper end of a drive shaft 48 (see Figs. 2 and 8) to the lower end of which is secured the beveled pinion 49 meshing with a larger gear 50. The gear 50 is driven from the main driving shaft 51 of the feed frame attachment.

To provide relief in case the feed jams, the two rotary feed plates are driven through a yielding or friction connection from the shaft 51. For thatpurpose both sides of the beveled gear 50 (see Fig. 11) are faced with friction material 52 and the gear is held by the spring 55 between the flanged sleeve 53, fixed on the driving shaft 51, and the sliding collar 54, the latter splined on the sleeve thereby permitting any required slippage.

The eyelets are transferred one by one from the mouth of the outlet and presented to the mouth of the transfer mechanism, which, as shown, comprises a pair of gripping members which are reciprocated back and forth in front of the guideway outlet by the oscillating arm 56. The gripping means comprises the member 57 having an arc-shaped promulgation which closes the mouth of theguideway at all times except when the gripper is in the receiving position. A pocket or recess 58 is formed between this member 57 and the member 59, which is pivoted on the member 57.

When the grippers are retracted, the projecting end of the gripper 59 strikes the outer edge of the guideplate 38 and is forced back from the gripper 57 to permit the reception'of the contact. As soon as the grippers move forward, the movable gripper 59 again closes, holding the seized contact fast,

being driven from the main feed shaft 51 by the bevel gears 71 and 7 5 (see Fig. 8.)

To insert the selected eyelet or contact in the mold, there is provided means for disengaging the contact from the grippers and directing it into the mold in its appropriate position. Herein such means are embodied in the form of a plunger 76 (see Fig. 6). The plunger reciprocates vertically in line with that mold designated as 2 in Fig. 1, and in line with the contact piece when the latter is presented by the grippers at their forward extreme movement. The plunger carries a projecting end 77 of reduced diameter adapted to pass through the perforation of the contact and on which the latter when disengaged from the gripper jaws is free to gravitate into the mold.

The operationof inserting the contact is as follows: The mold carrier advancing, brings the empty mold to rest in alinement with the plunger 76. At the same time the selected contact is presented by the gripper jaws directly in line with the plunger. The end 77 of the descending plunger passes through the perforation of the contact and into the mold. At the same time the grippers start to move back, this causing the pivoted gripper member 59 to yield and slide over the contact, which, being thereby disengaged, drops into the mold, its exact centering in the bottom of the mold being insured by the guiding stem 77 on the plunger. The plunger then lifts, leaving the mold carrier free to advance the next mold for a repetition of the same cycle' of opera-- tions. The plunger is raised and lowered in suitable timed relation to the movement of the mold carrier by means of the vertically reciprocating head 78 (Figs. 1,2 and 6). The latter is secured to the reciprocatory rod 79 (Figs. 6 and 7) which is actuated through the link connection 80 to the bell crank lever 81, the latter pivoted at 82 to the bracket 83 (Figs 6 and 7) the bell crank lever being oscillated by the facecam 81. The latter is driven by means of the gear 85 meshing with the gear 86. which latter is connected to the sleeve 87 fixed on the main power shaft 88 of the base .forming machine. The head 78 is additionally guided by the guide rod 89 secured thereto and sliding in the guideways on the frame.

Referring now to the insertion in the mold of the shell contact 4:, the latter is introduced therein at a subsequent step in the travel of the mold and herein in the second position or that represented by the mold 2 (Fig. 1). Referring to F igs; 12 to l i, inclusive, a quantity of the shell contacts are maintained in a large inclined hopper having the main rotatable cylindrical body 90 and the fixed bottom 91. The lower edge of the hopper is provided with a series of discharge openings 92 of such shape that the shells can escape therefrom only right side up, such openings permitting the passage of the shells to a guidewav partly encircling the hopper, the bottoin of which guideway is formed by a prolongation of the fixed hopper bottom 91. I

The hopper bottom is provided with a series of radial slots 93 in which may be secured at appropriate points suitable obstructing or agitating devices so placed as to assist the discharge of the shells through the openings 92. Herein there is provided a series of three pegs 91 near the upper side of the hopper just beyond the point of great-, est elevation and a baflie plate 95 on the bottom side thereof. These obstructions tend to keep the major mass of the shells in the uppermost part of the hopper, permitting them to gravitate to the lowermost part of the hopper only in close proximity to the openings 92 so that the latter tend to become filled with the shells and the shells to gravitate through the openings into the guideway as they descend toward the lowermostposition of the hopper bottom.

The hopper is rotated in the directionof the arrow shown in Fig. 12 by means of the gear 96 secured to the outside of the hopper drum and meshing with the driving pinion 97. The latter has a friction drive to permit slippage in case the feed of the shells becomes ammed, being for that purpose pressed between the friction disks 98 and 99 by means of the spring 100. The friction disks are driven from the short shaft 101 (Fig. 15) the latter having movement im-' parted thereto by the beveled gears 102 and 103 and the upright shaft 104, which latter is connected to be driven from the main feed shaft 51 by the beveled gears 105 and 106 (Fig. 8).

The hopper openings may occasionally receive shells which are defective or which become jammed therein. To clear the openings of such shells we have provided a clearing device which herein consists of the toothed wheel 107 (Figs. 12 and 13) the teeth of which mesh with the openings 92 i means of a latch lever 110 it can be fixedly engaged with or disengaged from the segment 111 and thereby applied or withdrawn. The shell contacts discharged into the guideway are conveyed to a continuation of the guideway which extends over the rotary feedplate 112 (Fig. 16) and to gripping and transferring devices of quite similar construction to those previously described.

tending thereover.

Although substantially the same means might be employed for advancing them to the feed plate 112, means are herein shown which differ somewhat in specific details from those used for advancing the eyelets. Herein the shells are forced by the movement'of the hopper up an inclined portion of the fixed guideway and into agravity chute portion 113 thereof (see Figs. 1, 12, 14 and 16), by means of which they are delivered down upon the feed plate 112 and into the prolongation of the guideway, ex-

Referring to Figs. 12 to 15, inclusive, the side 114 and bottom 115 of the stationary or initial portion of the guideway is formed by the projecting walls of the hopper. bottom. At and along the position whereat the shells tend to gravitate through the hopperopenings the guideway is provided with a supplemental side wall 116 comprising a resilient strip secured to the side wall 114 and gradually converging toward the hopper wall. As the shell pieces gravitate out of the hopper openings during the rotation'of the'latter, instead of falling directly out of the hopper, they first strike the converging side wall 116- and gradually work into the wider portion of the guideway until they are wholly contained therein. The escape of the'shells from the hopper beyond the converging side wall 116 is prevented by means of the fixed inner guideway wall 117 which (Figs.- 12 and 13) interposes apartition between the hopper openings and the guideway beyond the wall 116. The gradual escape of the shells as permitted by the side wall 116 gives the hopper a grip upon the shells which have emerged part way only into the guideway and causes these shells to force those ahead in the line of wholly -discharged shells along the guideway, up the incline thereof and into the gravity chute 113.

The guide wall 116 is adjustable within suitable limits toward or from the hopper by means of the adjusting screw 118 so that the force with which the hopper presses ahead on the line of shells can be varied. The top of the guideway is closed by means of the hinged cover 119, the latter being provided with a series of openings 120 through which the behaviorof the shells may be observed.

, It will be seen that, while the shells are delivered to the guideway by gravity, they are forcibly advanced up the incline thereof by the turning movement of the hopper until the abrupt turn in the guidewayis reached, whereat they drop into the gravity chute 113 and slide down into contact with the rotary feed plate 112.

Means are preferably provided, as in the case of the eyelet feeding apparatus, to prevent interruption of the feed through jamming or overcrowding, the parts being so shaped and the relative location of the exit- 121 and side wall 122 is such that, if the feed plate 112 is over-supplied with shells they back up into the chute, forming a continuous line so that the next shell reaching the chute strikes the preceding shell and is deflected into the lateral exit 121 falling into the underlying fixed chute 123, whereby it is dis charged into a barrel or other suitable receptacle. If the preceding-shell, however,

has advanced well into the gravity chute the pressure of the succeeding shells will force the shell in question also into the chute instead of causing its deflection through the exit.

Referring now to the feed plate 112, the latter is driven in the direction-of the arrow by means of the underlying bevel gear 124 (Fig. 17 driven by the beveled pinion 125 and sprocket wheel 126, the latter having driving connection to the main feed shaft 51 (Fig.8) through the chain 127 and sprocket driving wheel 128..

The side walls of the guideway extension over the feed plate are formed by the fixed segment 129 (Figs. 16 and 17) fastened to the fixed base 130, the top of the guideway being covered by means of the segmental plate 131 fastened 'to the fixed segment 132. The plate has longitudinal openings 133 and is secured to the segment by the screws 134 which passthrough slots having enlarged ends so that the topl may be removed for inspection or to wit draw damaged shells.

Shells passing along the guideway are discharged one by one into gripping devices 135 and 136, being adapted to engage a shell and convey it over a mold. The pivoted aw member is normally drawn against a selected shell by' means of the spring 137 but, on its return movement, strikes the end of the adjustable screw 138 carried by the fixed arm 139 and is swung back so as to receive a shell expelled from the guideway (see Fig. 18). The grippers are carried by the gripper arm 140 which is oscillated by the rock lever 1 11, connecting rod 112 and crank disk 143, there being provided a friction connection between the arm 110 and lever 141 similar to that between the arm 56 and lever 63 previously described. The crank disk (see Fig. 8) is carried by a shaft to the lower end of which is secured the gear 144, the latter meshing with the gear 1 15 on the shaft 116. The lower end of the shaft 146 carries the beveled gear 147 meshing with the beveled gear 148 on the main shaft 51.

The shells, when released from the hopper outlet and picked off singly by the grippers, are conveyed over a mold in the same fashion as the eyelets, whereupon a plunger 149 (Fig.- 6) descends into the shell causing its release from the jaws which latter immediately retract and open. The continued descent of the plunger directs the shell squarely into the mold so that as the plunger lifts the shell is left accurately seated in the re-' quired position.

The plunger is slidably mounted in the holder 150 carried by the vertically reciprocating head 7 8 being normally pressed down by the stiff spring 151 so that it has a slight yielding movement. The plunger 119 being depressed simultaneously with the eyelet plunger 76, the eyelet and the shell are placed in their respective molds simultaneously;

The above described feeding mechanism may be carried by, and constitute a part of, the base making machine, but preferably, and as shown herein, its principal parts are carried upon a separate frame 152, which may be placed adjacent to a standard base making machine provided with the plungers 149 and 76 and temporarily secured to the frame of such machine. Such base making machine may then be used either with the automatic feeding mechanism or may be used with a manual feed, the feeding frame 152 being removed and plungers 7 6 and 149 being disconnected from the driving mechamsm.

To drive the feeding attachment from the main machine and in timed relation thereto when constructed as a separate attachment therefrom as shown in the drawing, the main feeding shaft 51 is provided with, a driving sprocket wheel 153 which is driven by a driving chain 154: (Figs. 7', 8 and 9), the latter is connected to a sprocket wheel 155 carried by a short shaft 156 on the main machine frame. The shaft 156 is driven (Fig. 6) by the intermeshing bevel-gears 157 and 158, the latter being carried by a shaft 159 having the gear 160 meshing with the bevel-gear 161 on the sleeve 87 driven by the main driving shaft 88.

The feeding-mechanism may be thrown into or out of operation by means of a clutch interposed between the main feeding shaft 51 and the sprocket wheel 153. This clutch (Figs. 8, 9 and 10) comprises a driving member 162 having a circumferential collar 'groove and a slidable driving pin 163 carried by the driving member and normally seated in a depression in the face of the sprocket wheel 153 by means of a spring 164:. That portion of the driving pin, however, opposite the collar groove is slotted and has a beveled edge 165 which, in the r0- tation of the driving member, is brought against the beveled edge 166 of an areshaped operating finger 167, if the latter is lifted and seated in the collar groove. This results in drawing the driving pin 163 out of the depression in the sprocket and in disconnecting the power from the driving shaft. To lift the finger, the latter is pivotally supported at 168 and is connected to the link 169 and thereby to the rock shaft 170, the latter extending to the front of the machine, whereat it has attached the handle 171 by which the rock shaft may be turned and the finger raised to cut off the power.

While often unnecessary, it may be sometimes desirable, to insert the small center contact into the mold with a mold bottom thereon lifted so as to decrease the distance which the contact is obliged to descend before reaching the mold bottom. This may be readily accomplished in the described form of machine by providing at the appropriate place a lifting cam or other device, such as the appropriately inclined arm 172 (Fig. 2) hinged at 173 on the machine frame. The opposite end of the arm rests upon the screw 17-1 so that its elevation may be adjusted the arm being so located that, as the I escape of articles from the hopper to the guideway. the guideway being so formed as to cause the gradual emergence of said articles through said openings thereby to force the preceding articles along on said guideway, said hopper being adapted to deliver articles to the guideway in excess of the requirements of the machine, and means providing for the escape from said guideway of the excess of articles so delivered.

2. In an automatic feeding mechanism for feeding articles to a given operation, the combination with a discharge hopper, having a series of openings through which the said articles are adapted to be discharged, and a toothed clearing wheel journaled on a swinging arm adjacent said hopper whereby said wheel may be caused to engage the openings in said hopper.-

. 3. In a feeding mechanism, the combination with a hopper having a rotatable cylindrical body, discharge openings in the lower edge thereof through which the articles contained in the hopper may be discharged, said hopper being supported at an inclination, and a guideway partly encircling said hopper, the walls of said guideway converging toward said hopper near the lowermost portion thereof, whereby the discharged ar- (ticles are allowedwto emerge gradually into the guideway and cause the forcible advance of the preceding articles contained in the guideway.

4. In a feeding mechanism the combination with a receptacle, a guideway into which articles are discharged from the receptacle, means for forcing the articles along the guideway, said guideway having an inclined portion to form a gravity chute and having an abrupt turn at the beginning of said chute, and a lateral exit in said guideway located opposite said turn to permit the escape of articles fed thereto to excess of the requirements of the mechanism.

5. In 'a feeding mechanism an inclined hopper for holding the articles to be fed having a rotary cylindrical wall and a stationary bottom extending from wall to wall, said wall having discharge openings at the bottom thereof, and means for directing the said articles toward said openings.

6. In a feeding mechanism an inclined hopper for holding the articles to be fed having a rotary cylindrical wall and a stationary bottom, said wall having discharge openings at the bottom thereof, and stationary' meansfor directing the said articles toward said openings.

7 In a feeding mechanism an inclined hopper for holding the articles to be fed having a rotary cylindrical wall and a stationary bottom, said wall having discharge openings at the bottom thereof, and stationary means carried by the said bottom for directing the said articles toward said openm s.

In a feeding mechanism the combination of a hopper comprising a rotary wall having discharge openings at the bottom thereof and a stationary guideway communicating with said openings comprising a movable wall and means for adjusting the position thereof to vary the width of said guideway.

9. In a feeding mechanism-the combination of a hopper comprising a rotary wall having discharge openings at the bottom thereof and a stationary guideway communicating with said openings comprising a resilient wall, and means for adjusting the position thereof to vary the width of said guideway.

10. In a machine for making bases, the combination of a plurality of mechanisms each feeding contacts, a series of molds movably supported adjacent the outlets of said feeding means, and means for transferring and inserting a contact from each of said feeding means simultaneously into different molds.

11. In a machine for making bases, the combination of a plurality of mechanisms each feeding contacts, a seriesof molds movably supported adjacent the outlets of said feeding mechanisms, a transferring means for presenting a plurality of contacts simultaneously each over a mold, and means for simultaneously inserting each of said contacts in its respective mold.

12. In a machine for making bases, the combination of a series of molds and means for moving said series in a horizontal plane, a plurality of feeding mechanisms having outlets adjacent the path of travel of said molds each comprising means for presenting a contact over one of said molds and means adapted to engage simultaneously with each of said contacts for inserting the same into a mold. I

13. In a machine for making bases, the combination of a series of molds and means for moving said series in a horizontal plane, a plurality of feeding mechanisms having outlets adjacent the path of travel of said molds each comprising means for presenting a contact over one of said molds and a plunger adapted to engage simultaneously with each of said contacts for inserting thesame into a mold.

14. In a machine for forming incandescent lamp bases,the combination of a rotaa shell and means whereby said plungers are caused to act simultaneously each on a part for a different mold.

In witness whereof, we have hereunto set our hands this 10th day of Aug. 1916.

THOMAS I. WALKER. JULIUS A. AKEROYD.

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