US2404782A - Assembling apparatus - Google Patents

Assembling apparatus Download PDF

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Publication number
US2404782A
US2404782A US565840A US56584044A US2404782A US 2404782 A US2404782 A US 2404782A US 565840 A US565840 A US 565840A US 56584044 A US56584044 A US 56584044A US 2404782 A US2404782 A US 2404782A
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US
United States
Prior art keywords
discs
conductor
slits
central
central conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US565840A
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English (en)
Inventor
George E Berggren
Bertalan Edward
Arm Glen
Logan Alexander
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to BE466046D priority Critical patent/BE466046A/xx
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to US565840A priority patent/US2404782A/en
Priority to FR938242D priority patent/FR938242A/fr
Application granted granted Critical
Publication of US2404782A publication Critical patent/US2404782A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/18—Applying discontinuous insulation, e.g. discs, beads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5147—Plural diverse manufacturing apparatus including means for metal shaping or assembling including composite tool
    • Y10T29/5148—Plural diverse manufacturing apparatus including means for metal shaping or assembling including composite tool including severing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5191—Assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor

Definitions

  • This invention relates to assembling apparatus and more particularly to apparatus for assembling annular insulating and spacing discs on a central conductor used in making coaxial cables.
  • Coaxial cables usually comprise a solid central conductor and a tubular outer conductor, which is held away from and maintained coaxially of the central conductor by means of waferlike spacing and insulating discs.
  • Such cables have been made in the past by stringing insulating discs having central apertures therethrough upon the central conductor, much in the same manner that beads are strung upon a strand, and then forming the tubular outer conductor over the discs in any suitable manner. It also has been suggested that the discs be molded directly upon the central conductor, but this method requires complicated and expensive apparatus.
  • Another method of making these cables was to punch a number of insulating discs from a strip of suitable material, such as hard rubber, in a punch press having a punch and die of such configurationthat the discs had central apertures for receiving the central conductor and radial slots extending from the central openings to the periphcries of the discs through which the central conductor was forced into the central openings.
  • the radial slots had constricted portions, and the discs were sufficiently resilient to permit the slots to open up as the central conductor passed through the constricted portions and to snap back around the conductor after the conductor had entered the central apertures in the discs. As a result, the discs engaged the central conductor firmly and could not be displaced readily.
  • 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 central conductors without breaking the discs. Hence, when polystyrene discs are used they must be threaded or molded upon central conductors. 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 conductors is costly and complicated.
  • slotted discs to central conductors may be performed with satisfactory results when the discs are made of a relatively hard, resilient material, such as hard rubber, but this method is unsatisfactory when discs made of soft plastics are employed.
  • plastic materials which has properties that render insulating discs made therefrom especially suitable for use in the manufacture of coaxial cables, is the one obtained by polymerizing ethylene.
  • This material which is called polyethylene, is a moderately soft, pliable material, having a high molecular weight and possessing excellent insulating characteristics.
  • This material may be obtained from several sources, one of which is E. I. Du Pont ole Nemours & Company, which sells it under the trade name Polythene.
  • Polyethylene is sufficiently hard to permit insulating discs made therefrom to maintain their shapes under ordinary circumstances, but it is soft enough to cause some manufacturing difficulties to arise when slotted discs are punched from strips thereof, Furthermore, when slotted discs of the type formerly made of hard rubber were made of polyethylene and were forced upon a central conductor, the sides of the slots occasionally were deformed by the passage of the conductor therethrough. As a result, the discs would not adhere firmly to the central conductor, and would tend to slide along the conductor or might even come off the conductor.
  • An object of the invention is the provision of simple and effective apparatus for assembling articles.
  • An apparatus embodying the invention operates 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 conductor with a wiping motion, the slits in the discs being held slightly openand maintained in the slots in the feed wheels by means of retus for applying annular insulating and spacing .discs to a central conductor, which apparatus embodies the apparatus of the present invention and provides means by which the present invention may be practiced;
  • Fig. 2 is an enlarged, fragmentary, detailed sectional view taken substantially along the line 2-2 of Fig. l in the direction of the arrows;
  • Fig. 3 is an enlarged, fragmentary, sectional View taken substantially along the line 3-3 of Fig. 1 in the direction of the arrows;
  • Fig. 4 is a fragmentary, sectional view taken substantially along the line 4-4 of Fig. 3 in the direction of the arrows and showing details of one of the feed wheels and its co-operating parts;
  • Fig. 5 is a'greatly enlarged detailed View in section taken substantially along the line 5-5 of Fig. 4 in the direction of the arrows and showing an insulating disc being carried by a feed wheel, together with the retainer provided for holding the discs on the feed wheel and for holding open the slits in the discs;
  • Fig. 6 is a fragmentary plan view, partly in section, of the hopper and its communicating disccarrying mechanisms for directing the annular discs to the feed wheels;
  • Fig. 7 is an enlarged, fragmentary, vertical, sectional view taken substantially along the line 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 cable utilizing the unit comprising the central conductor and insulating discs assembled in accordance with the present invention.
  • Fig. 12 is a view in perspective of a short length of coaxial cable, which utilizes the unit formed in accordance with the present invention, part of the tubular outer conductor being broken away to illustrate the positioning of the insulating and spacing discs between the tubular outer conductor and the central conductor.
  • a main support member [5 is provided for supporting a hopper designated generally by the numeral 16, feed wheels I! and I8 and transfer devices designated generally by the numerals l9 and 20.
  • the hopper l5 and the transferdevice 9 are interconnected by a-guide designated generally by the numeral 2
  • the details of the hopper l6 are shown most clearly in Figs. 6 and 7 and, by reference to these figures, it will be seen that the hopper includes an inverted cone-shaped bin 23, into whichannular discs may be dropped haphazardly.
  • the bin 23 terminates at its lower end in an annular member 24 surrounding a substantially cone-shaped agitator 25.
  • the agitator 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 power to drive a pair of shafts 21 and 28 on which the feed wheels H and I8 are mounted.
  • This driving connection may be of any suitable construction and, since the details thereof are not pertinent to the present invention, they have not been described in great detail.
  • the cone 25 is provided with a flattened cylindrical lower end 30, which, together with the bin 23, defines an annular slot 3
  • Fixed to diametrically opposed surfaces of the agitator 25 area pair of feed fingers 33 and 34 made of steel wire and bent to extend into the annular slot 3
  • the feed fingers 33 and 34 are sufficiently resilient so that if the guides 2
  • and 22 and these devices comprise support plates 4
  • Both of the assemblies 42 and 43 are of exactly the same construction and, accordingly, only the assembly 42 will be described in detail.
  • the assembly 42 comprises two plates 44 and 45 suitably fixed together iri abutting relation.
  • the plate 45 has a groove 46 formed therein which, 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 finger 45, which is formed integrally with the plate 45 and extends into an annular slot 48 formed on the flat lower surface of the cone-shaped agitator 25.
  • the finger 41 serves to strip the discs out of the slot 3
  • the annular member 25 is cut away, as shown at 49 and 50, to receive the plates 44 and 45 so that the plates 44 and 45 will cooperate to guide the discs into the guides 2
  • and 22 are of the same general construction except that they are bent at different angles for guiding the discs 32-32 fed therein from opposite sides of the hopper I6.
  • and 22 comprises, as shown most clearly in Fig. 2, a strip 5
  • is a thin plate 53, which,
  • permits visual inspection of the supply of discs 32-32 in the guides and, if desired, air blasts may be directed against the discs to insure that they move down the guides.
  • and 22 terminate in a transfer block 60, which has a slot 6
  • the slot 61 is in communication with a plunger slot 62, in which a plunger 63 is slidably mounted.
  • the plunger 533 is mounted upon a connecting member 64, which is formed integrally with a cam projection 65,
  • a spring 56 normally urges the camming projection 65 and connecting member 64 to the left, as seen in Fig. 2, to carry the camming projection 5.5 into engagement with a cam 61.
  • the cam 57 is mounted upon the shaft 28 and is positioned in back of the main support member l5.
  • the shaft 25 also carries a gear 63 in mesh with a gear 59 fixed to the shaft .2! and the shaft 2'! also carries a cam member 153 of exactly the same construction as the cam 61.
  • the construction is the same for both transfer devices [9 and 20.
  • a plate 1'! 8 fixed to the main support member l5 serves as a guide for the connecting member 64 and the main support member I5 is provided with a suitable aperture '22, which permits the connecting member 64 and camming projection 65 to reciprocate in a guide slot 73 formed in the plate ll.
  • annular disc 32 will be fed into each of the notches Hi-H. cut therein and will be carried around with the feed wheel I13.
  • a knife l6 (Figs, 4, 8 and 9), which will cut a radial slit 7'! (Figs. 9, 11 and 12) in each disc as the di cs are carried past the knife.
  • Extending peripherally of the feed wheel lBin direct vertical alignment with the knife i5 is a retainer l5, with which the slit l! in each annular disc will engage and with which the edge of the central aperture iii of each disc will engage (Figs.
  • the retainer 18 extends to a position Where it is engaged on its upper edge by a central conductor 85, on which the discs 32-32 are to be assembled.
  • the retainer 73 has the same thickness as the bottom portion of the knife l5 and the discs which are slit by the knife pass directly from the knife onto the retainer.
  • the retainer holds the slits formed in the discs slightly open until the discs reach the central conductor 80, which permits the central conductor to slid -freely into and through the slits into the central apertures Iii-l2 in the discs.
  • the central conductor 88 is fed through a guide 8
  • the construction of the slitting mechanism at the transfer device 29 is exactly the sameas at the transfer device l9, lf'here is provided a knife similar to the knife '56 for slitting the discs radially and a retainer 82 similar to the retainer 18, but shorter than the retainer 13, for guiding those discs 32-32 which are fed to the feed wheel I! 6 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 notches 14-14 and -15 alternately about its periphery in the same manner as is the disc is, since it is desired to apply the discs 32-32 from opposite sides of the central conductor 82.
  • a tubular outer conductor'83 is applied around the discs 32-32 co-axially with the central conductor 853, the discs 32-32 will hold the tubular outer conductor spaced an equal distance from the central conductor 89 throughout the length of the cable and will insulate th two coaxial conductors from each other.
  • each of the knives illustrated by the knife 76 comprises a flat shank 88 having a head 84 formed at the end thereof adjacent to its companion feed wheel.
  • the bead 84 has a raised point 65 at the top 1 thereof designed to cause the bead to enter the central apertures 12-79 of the discs 32-32 so that a curved cutting edge 86, which is formed at the upper edge of the shank and extends from the point 8 5 to a point on the shank beyond the outer edges of the discs, may cut a radial slit 7'! in each disc a the discs 32-32 are carried past the knives by the feed wheels.
  • the notches 14-14 which carry the discs 32-32 on both of the feed wheels I! and I8, are arranged so that when one of the discs 32-32 is forced onto the central conductor 80 b the feed wheel l8, one of the notches 15-15 in the feed wheel I! will receive the upper end of the disc.
  • the feed wheel I1 carrying a disc 32 in one of its notches i l-l4 reaches the position where the disc is to be forced onto the central conductor, the notch Min the feed Wheel I! which carries the disc will be in alignment with a notch 15 on the feed wheel l8 and the latter notch will receive the disc.
  • annular insulating and spacing discs 32-32 may be thrown haphazardly in the hopper ts, from which they will be fed by the feed fingers 34 and 35 into the guides 2i and 22.
  • the discs 32-32 will travel down the guides to the transfer devices I9 and 23 and the cams l5! and H1, operating in timed relation with each other, will transfer the discs into th notches 14-14 of the feed wheel I! and 13.
  • the discs As the discs are carried around by the feed wheels H and [8, they will be drawn past the knives, illustrated by the knife l6, and a radial slit will be cut in each discby the knives, The slitted discs will then be carried around by the feed Wheels ii and I2, being held in the notches Id-i4 by the retainers 82 and 78, until the slitted discs are forced onto the central conductor 85 travelling from left to right as seen in Fig. 1. After the discs 32-32 are thus applied to the central conductor 89. the tubular outer conductor 83 may be applied over the discs in any suitable manner.
  • the retainers l3 and 82 maintain the slits ll-Tl in the discs 32-32 slightly open from the time the slits are cut therein by the knives until the discs reach the central conductor 89 upon which they are applied. This permits the central conductor 59 to enter the slits readily and to slide easily through the slits into the central apertures ls-l9 of the discs.
  • the discs 32-32 are carried toward the central conductor by the feed wheels l1 and 18 along arcuate paths and, consequently, the discs are forced upon the central conductor with a wiping motion.
  • 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 central conductor with a wiping motion, no injury results to the forward corners and sides of the slits, such as might occur if the slits were permitted to close before they reach the central conductor and were forcibly opened by the passage of the central conductor therethrough. This is especially important when the insulating discs are made of relatively soft materials, such as polyethylene.
  • the slits are released as the discs are applied to the central conductor and are free to close after the discs have been placed upon the central conductor.
  • the slits tend to close up and the discs substantially completely surround the central conductor, somewhat in the manner illustrated in Figs. 11 and 12, thereby insuring the retention of the discs in their proper places upon the central conductor.
  • the central apertures 19-19 in the discs 3232 are slightly smaller in diameter than is the central conductor Bil.
  • the central conductor tends to spread open the slits 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 firmly.
  • the 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 conductor.
  • the apparatus outlined hereinabove obviates the problems that would arise if an attempt were made to slit the discs at the time the are formed, to feed the slitted discs from a hopper into a pair of mechanisms with the slits orientated and to advance the discs through the mechanisms to the applicator Wheels.
  • deformation of the walls of the slits is prevented and the discs so applied to a central conductor engage the conductor firmly. It is diflicult to purposely remove discs thus applied to the conductor, much less to remove them accidently, because the slits tend to close up around the conductor and the conductor is engaged by a substantially solid ring of insulating material, such as is illustrated in Figs.
  • the apparatus embodying the invention may be used equally well to apply discs made of other relatively soft insulating materials to central conductors.
  • the insulating discs may be made of cellulose acetate or mixtures of cellulose acetate and cellulose butyrate, or may be fabricated from relatively soft products obtained by polymerizing vinyl compounds, such as are obtained by polymerizing vinyl chloride and vinyl acetate or mixtures thereof.
  • an apparatus for applying soft annular discs to a conductor means for feeding a plurality 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 discontinuous annuli, means passing through the resulting cuts in the discs for expanding the cuts and means entering the expanded cuts for maintaining them expanded, said last mentioned means extending to the conductor, whereby the conductor slides freely through the expanded cuts without damaging the discs.
  • An apparatus for use in applying soft annular discs to a conductor comprising a guide for receiving slitted discs along one side thereof and for guiding the discs to a conductor, the guide being thinner than the diameter of the conductor and being received in the slits in the discs to hold them open, and means in advance of the guide for forming slits in the discs which have a gap no wider than the thickness of the guide, said slitting means including means for expanding the slits in the discs and while the slits are expanded guiding the discs to the guide.
  • An apparatus for applying soft annular insulating discs upon a conductor which comprises a rotatable feed wheel for advancing such discs to and forcing them upon the conductor, means 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 maintaining the slits expanded until the discs are advanced to theconductor.
  • An apparatus for applying soft annular insulating 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 path of discs carried by the feed wheel for cutting radial slits in the discs and for expanding the slits, and an arcuate retainer adjacent to the knife and in alignment therewith for entering the expanded slits and keeping them expanded until the discs reach the conductor.
  • an apparatus for applying soft annular insulating discs upon a conductor means for advancing a plurality of such discs along a predetermined path to the conductor, a knife extending into said path for cutting radial slits in the discs advanced therealong, said knife having a cutting edge of reduced thickness on the side thereof first engaged by the discs and expanding to a greater thickness at the edge where the discs leave the knife, and a guide abutting the exit edge of the knife for entering the slits cut in the discs as the discs leave the knife to prevent the slits from closing, said guide extending to the conductor.
  • An apparatus for applying soft annular insulating discs to a conductor which comprises means for advancing a conductor longitudinally,
  • each of said 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.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
US565840A 1944-11-30 1944-11-30 Assembling apparatus Expired - Lifetime US2404782A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE466046D BE466046A (xx) 1944-11-30
US565840A US2404782A (en) 1944-11-30 1944-11-30 Assembling apparatus
FR938242D FR938242A (fr) 1944-11-30 1946-06-19 Procédé et appareil pour assemblage d'éléments tels que des disques isolants sur un conducteur électrique

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US565840A US2404782A (en) 1944-11-30 1944-11-30 Assembling apparatus

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US2404782A true US2404782A (en) 1946-07-30

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FR (1) FR938242A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515486A (en) * 1946-03-12 1950-07-18 Western Electric Co Assembling apparatus
US2515487A (en) * 1946-07-11 1950-07-18 Western Electric Co Article assembling apparatus
US2547132A (en) * 1947-06-06 1951-04-03 Western Electric Co Apparatus for preventing static charges from collecting on articles in a dispensing hopper
US2579487A (en) * 1946-10-10 1951-12-25 Western Electric Co Method of and apparatus for feeding and applying insulating disks to conductors
US2579468A (en) * 1946-10-10 1951-12-25 Western Electric Co Apparatus for making coaxial cable units
US2677879A (en) * 1950-03-10 1954-05-11 Int Standard Electric Corp Manufacture of coaxial conductor electric cables
US3149402A (en) * 1962-06-12 1964-09-22 Western Electric Co Apparatus for assembling and securing articles to a strip
US3360839A (en) * 1966-02-14 1968-01-02 Western Electric Co Slotted disc forming and assembling apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2515486A (en) * 1946-03-12 1950-07-18 Western Electric Co Assembling apparatus
US2515487A (en) * 1946-07-11 1950-07-18 Western Electric Co Article assembling apparatus
US2579487A (en) * 1946-10-10 1951-12-25 Western Electric Co Method of and apparatus for feeding and applying insulating disks to conductors
US2579468A (en) * 1946-10-10 1951-12-25 Western Electric Co Apparatus for making coaxial cable units
US2547132A (en) * 1947-06-06 1951-04-03 Western Electric Co Apparatus for preventing static charges from collecting on articles in a dispensing hopper
US2677879A (en) * 1950-03-10 1954-05-11 Int Standard Electric Corp Manufacture of coaxial conductor electric cables
US3149402A (en) * 1962-06-12 1964-09-22 Western Electric Co Apparatus for assembling and securing articles to a strip
US3360839A (en) * 1966-02-14 1968-01-02 Western Electric Co Slotted disc forming and assembling apparatus

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Publication number Publication date
FR938242A (fr) 1948-09-08
BE466046A (xx)

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