Патент USA US2404782код для вставки
July ‘ 30, 1946, G. E. BERGGREN ETAL ' ' 2,404,782 ‘AS S EMBLING APPARATUS Filed Nov. 50, 1944 ' 3 Sheets-Sheet l i I "47 J ' ERGGWEN £1 ERML AN ATTORNEY I V . ' July 30, 1946- G. E. BEléGGREN ET AL 2,404,732 ASSEMBLING APPARATUS Filed Nov. 50, 1944 ______ __ 5 Sheets-Sheet 5 ‘ ~ H426] _ F/C1‘ “8 85 86 as. mxvavroes‘ BEEGG‘REN 5' Em“ A Lo AN 8)’ ' TTORMEY Patented July 30, 1946 2,404,782 UNITED ‘STATES PATENT OFFICE 2,494,782 ASSEMBLING APPARATUS George E. Eerggren, Baltimore, Edward Bertalan, Glen Arm, and Alexander Logan, Dundalk, Md” assignors to Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application November 30, 1944, Serial No. 565,840 6 Claims. (Cl. 29—2t0) 1 a. This invention relates to assembling appara tus and more particularly to apparatus for as The application of slotted discs to central conductors may be performed with satisfactory sembling annular insulating and spacing discs results when the discs are made of a relatively on a central conductor used in making coaxial hard, resilient material, such as hard rubber, but this method is unsatisfactory when discs made of soft plastics are employed. One of the plastic materials, which has prop cables. This application is a continuation-in-part of copending application, Serial No. 470,746, ?led December 31, 1942. Coaxial cables usually comprise a solid cen tral conductor and a tubular outer conductor, which is held away from and maintained coax ially of the central conductor by means of wafer erties that render insulating discs made there from especially suitable for use in the manu facture of coaxial cables, is the one obtained by polymerizing ethylene. This material, which is called “polyethylene,” is a moderately soft, plia ble material, having a high molecular weight and possessing excellent insulating characteristics. ‘like spacing and insulating discs. Such cables have been made in the past by stringing insu lating discs having central apertures there 15 This material may be obtained from several through upon the central conductor, much in sources, one of which is E‘. I. Du Pont ole Ne the same manner that beads are strung upon a mours & Company, which sells it under the trade strand, and then forming the tubular outer con name “Polythene.” ductor over the discs in any suitable manner. Polyethylene is sufficiently hard to permit in It also has been suggested that the discs be 20 sulating discs made therefrom to maintain their molded directly upon the central conductor, but this method requires complicated and expensive apparatus. Another method of making these cables that has been used heretofore was to punch a num shapes under ordinary circumstances, but it is soft enough to cause some manufacturing dif? culties to arise when slotted discs are punched from strips thereof, Furthermore, when slotted 25 discs of the type formerly made of hard rubber ber of insulating discs from a strip of suitable were made of polyethylene and were forced upon material, such as hard rubber, in a punch press a central conductor, the sides of the slots occa having a ‘punch and die of such configuration sionally were deformed by the passage of the that the discs had central apertures for receiv ing the central conductor and radial slots ex tending from the central openings to the periph cries of the discs through which the central conductor was forced into the central openings. conductor therethrough. As a result, the discs would not adhere firmly to the central con~ ductor, and would tend to slide along the con ductor or might even come off the conductor. In addition, it is relatively easy to force such and the discs were suf?ciently resilient to permit 35 discs on the conductor by a thrust applied on the sides of the discs opposite the slots and sub the slots to open up as the central conductor stantially longitudinally of the conductor, be passed through the constricted portions and to Usually the radial slots had constricted portions, snap back around the conductor after the con cause the small amount of the material in the Walls of the slots against which the conductor ' ductor had entered the central apertures in the discs. As a result, the discs engaged the central conductor firmly and could not be displaced presses under those circumstances does not pos sess enough sheer strength to hold the discs in readily. place. Polystyrene has been suggested as a suitable material to use in making the insulating discs, but pure polystyrene is so brittle that slotted discs made therefrom cannot be applied to cen tral conductors without breaking the discs. Hence, when polystyrene discs are used they must be threaded or molded upon central con ductors. It is obvious that when long, con— tinuous central conductors are employed, it is impractical to thread centrally perforated discs upon such conductors, while apparatus for con— tinuously molding discs upon such central con ductors is costly and complicated. ' . An object of the invention is the provision of simple and effective apparatus for assembling articles. An apparatus embodying the invention oper ates as follows: a single hopper feeds annular insulating discs through two sets of separate feed paths to a pair of feed wheels, which carry the discs past knives to cut a radial slit in each annular disc and which alternately slide the discs upon a constantly moving central con ductor with a wiping motion, the slits in the discs being held slightly open‘and maintained in 55 the slots in the feed wheels by means of re 2,404,782 3 tainers ductor, tainers therein 4 . until the discs reach the central con whereupon the discs pass off the re upon the central conductor and the slits are free to close up around the central end in an annular member 24 surrounding a substantially cone-shaped agitator 25. The agi tator 25 may be rotated within the annular member 24 in any suitable manner, for example, by a motor (not shown) driving a transmission or gear reducing unit 26, which also supplies pow conductor. A complete understanding of the invention will be had by reference to the following de tailed description, when considered in conjunc er to drive a pair of shafts 21 and 28 on which the feed wheels H and I8 are mounted. This tion with the accompanying drawings, wherein driving connection may be of any suitable con Fig. l is a front elevational view of an appara 10 struction and, since the details thereof are not tus for applying annular insulating and spacing , pertinent to the present invention, they have not .discs to a central conductor, which apparatus been described in great detail. embodies the apparatus of the present invention Extending upwardly from the unit 26 is a and provides means by which the present inven shaft 29, on which the cone 25 is supported for tion may be practiced; rotation within the bin 23. The cone 25 is pro Fig. 2 is an enlarged, fragmentary, detailed vided with a flattened cylindrical lower end 30, sectional view taken substantially along the line which, together with the bin 23, de?nes an an 2-2 of Fig. l in the direction of the arrows; nular slot 3| into which annular discs 32-32, Fig. 3 is an enlarged, fragmentary, sectional as shown in Fig. 7, may drop when the agitator View taken substantially along the line 3-3 of - 25 is rotated within the bin 23. Fixed to di Fig. 1 in the direction of the arrows; ametrically opposed surfaces of the agitator 25 Fig. 4 is a fragmentary, sectional view taken area pair of feed ?ngers 33 and 34 made of substantially along the line 4-4 of Fig. 3 in the steel wire and bent to extend into the annular direction of the arrows and showing details of slot 3| formed by the annular member 24 and one of the feed wheels and its co-operating parts; the ?attened lower surface of the agitator 25, Fig. 5 is a'greatly enlarged detailed View in sec whereby any discs which drop into the slot move tion taken substantially along the line 5-5 of around in the slot as the agitator 25 rotates. The Fig. 4 in the direction of the arrows and show feed ?ngers 33 and 34 are sufficiently resilient so ing an insulating disc being carried by a feed that if the guides 2| and 22 are ?lled with discs, wheel, together with the retainer provided for 30 the feed ?ngers'will bend and pass over the tops holding the discs on the feed wheel and for of those discs in the slot 3 I. holding open the slits in the discs; Fig. 6 is a fragmentary plan view, partly in sec At opposite sides of the annular member 24, there are provided means for directing discs tion, of the hopper and its communicating disc 32-32 from the slot 3| into the guides 2| and carrying mechanisms for directing the annular ‘ 22. and these devices comprise support plates 4|] ‘ discs to the feed wheels; Fig. 7 is an enlarged, fragmentary, vertical, sectional view taken substantially along the line and 4| ?xed to the annular member 24 and car 1-1 of Fig. 6 in the direction of the arrows; Fig. 8 is a detailed, elevational View showing a knife for slitting the insulating discs; Fig. 9 is an enlarged, fragmentary perspective view'of the blade end of the knife shown in Fig. 7 and illustrating how the knife cuts slits in the annular discs; ‘Fig. 10 is a detailed view showing one of the annular discs before it is slitted; Fig. 11 is a cross-sectional view of a coaxial ryingr assemblies 42 and 43, respectively, for di recting the discs into the guides 2| and 22. Both of the assemblies 42 and 43 are of exactly the same construction and, accordingly, only the as sembly 42 will be described in detail. The as sembly 42 comprises two plates 44 and 45 suit ably ?xed together iri abutting relation. The plate 45 has a groove 46 formed therein which, ~15 when the assembly 42 is mounted in place, as shown in Figs. 6 and 7, comprises a tangential prolongation of the annular slot 3|. The groove 46 cooperates with the flat surface of the plate 44 to form a passageway into which the discs 32-32 will be directed by an extending ?nger cable utilizing the unit comprising the central conductor and insulating discs assembled in ac cordance with the present invention, and 45, which is formed integrally with the plate '45 Fig. 12 is a view in perspective of a short length and extends into an annular slot 48 formed on of coaxial cable, which utilizes the unit formed the ?at lower surface of the cone-shaped agi in accordance with the present invention, part of tator 25. The ?nger 41 serves to strip the discs the tubular outer conductor being broken away out of the slot 3| and guide them into the groove to illustrate the positioning of the insulating and 46. The annular member 25 is cut away, as shown spacing discs between the tubular outer conduc at 49 and 50, to receive the plates 44 and 45 so that the plates 44 and 45 will cooperate to tor and the central conductor. Referring to the drawings, wherein like refer guide the discs into the guides 2| and 22. ence characters designate the same parts 60 The guides 2| and 22 are of the same general throughout the several views, a main support construction except that they are bent at differ member [5 is provided for supporting a hopper ent angles for guiding the discs 32-32 fed there designated generally by the numeral 16, feed in from opposite sides of the hopper I6. Each of wheels I‘! and I8 and transfer devices designated the guides 2| and 22 comprises, as shown most ' generally by the numerals l9 and 20. The hop clearly in Fig. 2, a strip 5| having a slot 52 cut per l5 and the transfer‘device | 9 are intercon therein, in which the discs 32-32 will drop. At nected by a-guide designated generally by the tached to the strip 5| is a thin plate 53, which, numeral 2| and the hopper l6 and transfer de partially closes the slot 52 and will serve to re vice 20 are interconnected by a guide designated tain the discs in position therein while they are generally by the numeral 22. The details of the guided down from the hopper to the transfer hopper l6 are shown most clearly in Figs. 6 and 7 devices I9 and 20. A slit between the plate 52 and, by reference to these ?gures, it will be seen and strip 5| permits visual inspection of the sup that the hopper includes an inverted cone-shaped ply of discs 32-32 in the guides and, if desired, bin 23, into whichannular discs may be dropped air blasts may be directed against the discs to haphazardly. The bin 23 terminates at its lower insure that they move down the guides. 2,404,782 5 6 At the transfer devices 19 and 23, the guides 2| and 22 terminate in a transfer block 60, which has a slot 6| formed therein, which slot comprises a prolongation of the slot .52 in the strip 5|. The to a position where the discs will be forced onto the central conductor 80 and. for holding open the slits in the discs until they reach the central conductor. The feed wheel H is provided with slot 61 is in communication with a plunger slot notches 14-14 and 75-15 alternately about its 62, in which a plunger 63 is slidably mounted. periphery in the same manner as is the disc is, The plunger 533 is mounted upon a connecting since it is desired to apply the discs 32-32 from member 64, which is formed integrally with a cam opposite sides of the central conductor 82. When projection 65, A spring 56 normally urges the a tubular outer conductor'83 is applied around camming projection 65 and connecting member 10 the discs 32-32 co-axially with the central con 64 to the left, as seen in Fig. 2, to carry the cam ductor 853, the discs 32-32 will hold the tubular ming projection 5.5 into engagement with a cam outer conductor spaced an equal distance from 61. The cam 57 is mounted upon the shaft 28 the central conductor 89 throughout the length of and is positioned in back ‘of the main support the cable and will insulate the two coaxial con member l5. The shaft 25 also carries a gear 63 15 ductors from each other. in mesh with a gear 59 ?xed to the shaft .2‘! and As is evident from Figs. 8 and 9, each of the knives illustrated by the knife 76 comprises a ?at the shaft 2'! also carries a cam member 153 of exactly the same construction as the cam 61. shank 88 having a head 84 formed at the end thereof adjacent to its companion feed wheel. Thus, the construction is the same for both trans fer devices [9 and 20. 20 The bead 84‘. has a raised point 65 at the top 1 A plate 1'! 8 fixed to the main support member thereof designed to cause the bead to enter the l5 serves as a guide for the connecting member central apertures 12-79 of the discs 32-32 so 64 and the main support member I5 is provided that a curved cutting edge 86, which is formed with a suitable aperture '22, which permits the at the upper edge of the shank and extends from connecting member 64 and camming projection the point 8.5 to a point on the shank beyond the 65 to reciprocate in a guide slot 73 formed in the outer edges of the discs, may cut a radial slit 7'! plate ll. Each time the camming projection .65 in each disc as the discs 32-32 are carried past the knives by the feed wheels. strikes a low point on the .cam 67!, one of the discs Since the discs 32-32 are applied to the cen 32-32 will be transferred from the slot 6| into the feed wheel l8, which is provided with a series 30 tral conduct-or from opposite sides, the notches 14-14, which carry the discs 32-32 on both of of notches ‘ill-‘M for receiving the discs‘. It the feed wheels I‘! and I8, are arranged so that should be noted that the notches 74-74 alternate when one of the discs 32-32 is forced onto the with notches ‘iii-‘i5 around the periphery of the central conductor 80 by the feed wheel l8, one of feed wheel l8 and that the notches '55-'55 have one surface cut away for a purpose to be described i the notches 15-15 in the feed wheel I‘! will re ceive the upper end of the disc. Likewise, when hereinafter. the feed wheel I1 carrying a disc 32 in one of its As the feed wheel i8 rotates, an annular disc notches ill-‘l4 reaches the position where the 32 will be fed into each of the notches ‘Hi-H. cut disc is to be forced onto the central conductor, therein and will be carried around with the feed wheel I13. Just below the position’ where the feed 40 the notch ‘Min the feed Wheel I‘! which carries the disc will be in alignment with a notch 15 on wheel !8 receives the annular discs 32-3-2, there the feed wheel l8 and the latter notch will re is provided a knife ‘l6 (Figs, 4, 8 and 9), which ceive the disc. will cut a radial slit 7'! (Figs. 9, 11 and 12) in each disc as the discs are carried past the knife. In the operation of the present machine a sup Extending peripherally of the feed wheel lB‘in 45 ply of annular insulating and spacing discs 32-32 may be thrown haphazardly in the hopper ts, direct vertical alignment with the knife ‘i5 is a from which they will be fed by the feed ?ngers retainer ‘l5, with which the slit l‘! in each annular 34 and 35 into the guides 2i and 22. As the discs disc will engage and with which the edge of the 32-32 are fed into the guides, they will travel central aperture ‘iii of each disc will engage (Figs. 4 and 5), whereby the discs 32-52 will be forced 50 down the guides to ‘the transfer devices I9 and 23 and the cams l5‘! and ‘H1, operating in timed to travel aronndwith the feed wheel IS. The relation with each other, will transfer the discs retainer 18 extends to a position Where it is en into the notches 14-14 of the feed wheel I‘! and gaged on its upper edge by a central conductor 13. As the discs are carried around by the 85, on which the discs 32-32 are to be assembled. The retainer 73 has the same thickness as the 55 feed wheels H and [8, they will be drawn past the knives, illustrated by the knife ‘l6, and a bottom portion of the knife l5 and the discs which radial slit will be cut in each disc‘by the knives, are slit by the knife pass directly from the knife The slitted discs will then be carried around by onto the retainer. The retainer holds the slits the feed Wheels ii and I2, being held in the formed in the discs slightly open until the discs notches ‘Id-‘i4 by the retainers 82 and 78, until reach the central conductor 80, which permits the the .slitted discs are forced onto the central con central conductor to slide-freely into and through ductor 85 travelling from left to right as seen in the slits into the central apertures ‘Iii-‘l2 in the Fig. 1. After the discs 32-32 are thus applied discs. to the central conductor 89. the tubular outer The central conductor 88 is fed through a guide 8|, which cooperates with other guides and feed 65 conductor 83 may be applied over the discs in any suitable manner. mechanisms (not shown) for guiding the con As is apparent from Figs. 4 and 5, the retainers ductor past the feed Wheels I1 and I8 in timed ‘l3 and 82 maintain the slits ‘ll-Tl in the discs relation to the rotation of the feed wheels. The 32-32 slightly open from the time the slits are construction of the slitting mechanism at the cut therein by the knives until the discs reach the transfer device 29 is exactly the sameas at the central conductor 89 upon which they are applied. transfer device l9, rlf'here is provided a knife This permits the central conductor 59 to enter similar to the knife '56 for slitting the discs ra the slits readily and to slide easily through the dially and a retainer 82 similar to the retainer 18, slits into the central apertures ‘ls-‘l9 of the but shorter than the retainer 13, for guiding those discs 32-32 which are fed to the feed wheel I‘! discs. The discs 32-32 are carried toward the 2,404,782 7 8 central conductor by the feed wheels l1 and 18 slits, such as might occur if the slits were per mitted to close before they reach the central con ductor and were forcibly opened by the passage of the central conductor therethrough. This is es pecially important when the insulating discs are vinyl chloride and vinyl acetate or mixtures thereof. What is claimed is: 1. In an apparatus for applying soft annular discs to a conductor, means for feeding a plu rality of such discs along a predetermined path and to a conductor, and means adjacent to said path including means for cutting each of the annular discs advanced therealong to form dis continuous annuli, means passing through the resulting cuts in the discs for expanding the cuts and means entering the expanded cuts for main taining them expanded, said last mentioned means extending to the conductor, whereby the made of relatively soft materials, such as poly conductor slides freely through the expanded cuts ethylene. without damaging the discs. along arcuate paths and, consequently, the discs are forced upon the central conductor with a wiping motion. In view of the fact that the slits ‘H are held slightly open by the retainers ‘l8 and 82 until the discs reach the central conductor 80 and also because the discs are applied to the cen tral conductor with a wiping motion, no injury results to the forward corners and sides of the _ 2. An apparatus for use in applying soft an nular discs to a conductor, comprising a guide for adjacent to thecentral conductor 80, the slits are receiving slitted discs along one side thereof and released as the discs are applied to the central conductor and are free to close after the discs 20 for guiding the discs to a conductor, the guide being thinner than the diameter of the conductor have been placed upon the central conductor. As and being received in the slits in the discs to hold a result, the slits tend to close up and the discs them open, and means in advance of the guide substantially completely surround the central con for forming slits in the discs which have a gap ductor, somewhat in the manner illustrated in Figs. 11 and 12, thereby insuring the retention of 25 no wider than the thickness of the guide, said slitting means including means for expanding the the discs in their proper places upon the central slits in the discs and while the slits are expanded conductor. guiding the discs to the guide. ' The central apertures 19-19 in the discs 3. An apparatus for applying soft annular in 32—32 are slightly smaller in diameter than is the central conductor Bil. As a result, the cen 30 sulating discs upon a conductor, which comprises Since the retainers ‘l8 and 82 end at a point tral conductor tends to spread open the slits a rotatable feed wheel for advancing such discs ll—'ll in the discs, as is shown in Fig. 12, and the natural resiliency of the discs causes the discs to engage the central conductor ?rmly. After the to and forcing them upon the conductor, means tubular outer conductor has been applied over the ' unit formed by the central conductor and a series of discs applied thereto, the slits in the discs are substantially closed, as shown in Fig. 11, and then there is practically no possibility that the discs will slide along the central con ductor. The apparatus outlined hereinabove obviates the problems that would arise if an attempt for cutting slits in the discs carried by the feed wheel and for expanding the slits, and means adjacent to the slit-cutting means for entering the expanded slits in the discs and for maintain ing the slits expanded until the discs are advanced to theconductor. 4. An apparatus for applying soft annular in sulating discs upon a conductor, which comprises means for longitudinally advancing the conductor, a rotatable feed wheel for advancing such discs to and forcing them upon the movingconductor, a knife adjacent to the feed wheel and in the were made to slit the discs at the time they are formed, to feed the slitted discs from a hopper 45 path of discs carried by the feed wheel for cut ting radial slits in the discs and for expanding into a pair of mechanisms with the slits orientat the slits, and an arcuate retainer adjacent to the ed and to advance the discs through the mech knife and in alignment therewith for entering anisms to the applicator Wheels. Likewise, de the expanded slits and keeping them expanded formation of the walls of the slits is prevented 50 until the discs reach the conductor. , J and the discs so applied to a central conductor 5. In an apparatus for applying soft annular engage the conductor ?rmly. It is diflicult to insulating discs upon a conductor, means for ad purposely remove discs thus applied to the con vancing a plurality of such discs along a prede ductor, much less to remove them accidently, termined path to the conductor, a knife extend because the slits tend to close up around the con 55 ing into said path for cutting radial slits in the ductor and the conductor is engaged by a sub discs advanced therealong, said knife having a stantially solid ring of insulating material, such cutting edge of reduced thickness on the side as is illustrated in Figs. 11 and 12 of the draw thereof ?rst engaged by the discs and expanding ings. It is obvious that the location of the slit to a greater thickness at the edge where the discs ting step is important and that this invention 60 leave the knife, and a guide abutting the exit provides a simple yet elTective apparatus for as edge of the knife for entering the slits cut in the sembling articles, particularly apparatus for the discs as the discs leave the knife to prevent the application of insulating discs to central conduc slits from closing, said guide extending to the tors to form units suitable for use in the manu conductor. , 65 facture of coaxial cables. 6. An apparatus for applying soft annular in While the insulating discs 32,—32 preferably are sulating discs to a conductor, which comprises ' made of polyethylene, the apparatus embodying means for advancing a conductor longitudinally, the invention may be used equally well to apply rotatable feed wheels fOr carrying such discs to _ discs made of other relatively soft insulating ma opposite sides of the conductor and forcing them terials to central conductors. For example, the 70 upon the conductor, means for feeding the discs insulating discs may be made of cellulose acetate to the feed wheels, a knife associated with each feed wheel and positioned in the path of the discs or mixtures of cellulose acetate and cellulose bu tyrate, or may be fabricated from relatively soft carried by its associated feed wheel for cutting radial slits in said discs, each of said knives hav products obtained by polymerizing vinyl com ing a cutting edge of reduced thickness on the pounds, such as are obtained by polymerizing 2,404,782 _ V e 10 ‘ Side thereof ?rst engaged by the discs and exfrom closing and extending to a point close to panding to a greater thickness at the edge where the conductor, whereby the conductor slides free the discs leave the knife, and an arcuate retainer 1y through the slits Without damaging the discs. adjacent to each feed Wheel and abutting the exit edge of the associated knife, each of said Ui GEORGE E. BERGGREN. guides entering the slits cut in the discs as the EDWARD BERTALAN. discs leave the adjacent knife to prevent the slits ALEXANDER LOGAN.