US2805539A - Helical lapping apparatus - Google Patents

Helical lapping apparatus Download PDF

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Publication number
US2805539A
US2805539A US472993A US47299354A US2805539A US 2805539 A US2805539 A US 2805539A US 472993 A US472993 A US 472993A US 47299354 A US47299354 A US 47299354A US 2805539 A US2805539 A US 2805539A
Authority
US
United States
Prior art keywords
string
wire
coil
capstan
tension
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
US472993A
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English (en)
Inventor
Burr Harvey
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.)
Balfour Beatty PLC
Original Assignee
BICC PLC
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
Application filed by BICC PLC filed Critical BICC PLC
Application granted granted Critical
Publication of US2805539A publication Critical patent/US2805539A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
    • D07B7/02—Machine details; Auxiliary devices
    • D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42B—PERMANENTLY ATTACHING TOGETHER SHEETS, QUIRES OR SIGNATURES OR PERMANENTLY ATTACHING OBJECTS THERETO
    • B42B5/00—Permanently attaching together sheets, quires or signatures otherwise than by stitching
    • B42B5/08—Permanently attaching together sheets, quires or signatures otherwise than by stitching by finger, claw or ring-like elements passing through the sheets, quires or signatures
    • B42B5/12—Permanently attaching together sheets, quires or signatures otherwise than by stitching by finger, claw or ring-like elements passing through the sheets, quires or signatures the elements being coils
    • B42B5/123—Devices for assembling the elements with the stack of sheets
    • 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
    • H01B13/08—Insulating conductors or cables by winding
    • H01B13/0816—Apparatus having a coaxial rotation of the supply reels about the conductor or cable
    • 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
    • H01B13/20—Applying discontinuous insulation, e.g. discs, beads for concentric or coaxial cables
    • H01B13/206—Applying discontinuous insulation, e.g. discs, beads for concentric or coaxial cables by forming a helical web

Definitions

  • the wire may be a single wire or more than one wire stranded together to form a single body and it may have been previously provided with a covering, for instance of insulating material.
  • the string may be composed of fibrous material, such as cellulose libres, or of nontibrous material, for instance a polymeric material such as polyethylene.
  • string and wire respectively will be used to cover, in the first case, the member to be applied as a lapping and, in the second case, the member to which the lapping is to be applied.
  • a typical example of the use of the invention is the helical lapping of a spacing string on to a copper wire which is to form part of a cable for telephone or other communication service.
  • the applying means forming the invention comprises two parts in combination, the first of which draws the string from the coil through the rotating carrier guide and delivers it at zero tension or at negligibly small tension to the second part which applies by means of a friction brake constant tension to the string as it is drawn forward by the wire and preferably also serves to apply the string to the wire and guide it thereon.
  • the string when in this second part, is separated by the action of the lirst part from the influence of changes or irregularities of tension which occur in the drawing of the string from the coil so that the tension under which the string is applied to the wire is determined solely by the second part and, therefore, can readily be made substantially constant.
  • This may, for instance, be the known arrangement in which a coil of string with a at bottom rests on or is pressed on a slightly concave disc (which may be spring-supported) on the surface of which the coil slides in its rotation. about its axis as the string is withdrawn from it.
  • the coil in such an arrangement is in contact with the disc only near the outer surface of the coil so that the radius of application of friction to the coil decreases as the size of the coil decreases.
  • the first part of the applying means above mentioned is a device of the capstan type in which the string is lapped in a large arc of contact (e. g. two or more complete turns) round a smooth body of circular section and is caused to slip axially thereon so that feed on to the body can take place near one end thereof while delivery therefrom takes place at the other end.
  • the smooth circular surface is coaxial with the wire and the string is lapped on it by rotation of the carrier guide about that axis, the grip of the string on the surface providing the force to draw the string from the coil and through the carrier guide. While this arrangement differs from the usual arrangement of a capstan in that in the present case the barrel is stationary and the string is lapped round it by a rotating guide, the relative motion of the parts is the same and the same results follow.
  • the diameter of the smooth circular body and the lay of the helix which the string follows on that body are such that one turn of this helix is longer than one turn of the helix which the string forms on the wire. Hence there is a tendency for the operation of this de vice to over-feed the string towards the wire. This is corrected by the backward slipping of the string round the smooth body which is associated with the existence of negligibly small 0r zero tension in the string at the point where it leaves this smooth surface on its way to the second part of the applying means.
  • the axial movement of the string on ⁇ this smooth circular body can be produced by a member having a helical guide surface closely surrounding the smooth surface of the circular body but preferably not making contact with it, this helical member being made to rotate about the axis of the wire and acting as a long fleeting knife and at the same time determining the regularity of the pitch of the helix of the string on the smooth body.
  • the second part of the applying means may be in the form of a spring-loaded brake shoe and a support surface between which the string is drawn by the wire as it passes from the first part of the applying means to the point of formation of the helix on the wire.
  • Figure l is a part sectional view of the string applicator
  • Figure 2 is an end view of the same arrangement as seen in the direction of the arrow Il in Figure l;
  • Figure 3 is a part sectional view of a portion of the apparatus upon an increased scale
  • Figure 4 is a section taken on the line IV-IV in Figure 3.
  • the purpose of the apparatus shown is to wrap a string 1 about a wire 3 in the form of an open turn helix 4 as the wire is drawn through the axis of rotation of the device.
  • the string l is drawn from a bobbin 2 over a guide 5 rotated about the advancing wire.
  • the arrangements for forming the helix 4 under conditions of constant tension comprise two parts 6 and 7 in cornbination.
  • the first part 6 draws the string l from the coil 2 through the rotating carrier guide 5 and delivers it at negligibly small tension to the second part 7.
  • the second part 7 applies, by means of a friction-brake, a constant tension to the string as it is drawn forward by the wire and at the same time serves to apply the string to the wire and guide it thereon.
  • the apparatus is designed to rotate in the usual manner about the wire travelling vertically upward as the string is applied to it and the coil 2 is mounted coaxially with the wire and rotatable about it.
  • the device is supported on a double base plate 8 in the lower part 9 of which is fixed a stationary tube 10 which extends upward through the upper part 11 of the base.
  • This tube 10 extends completely through the centre of the support for the coil 2 and at its upper end is in the form of a smooth surfaced cylinder 12 which constitutes a member of the irst part 6 of the tension controlling arrangement.
  • a bearing 13 in the upper part 11 ofthe base 8 there is mounted a hollow spindle 14 to the lower end of which is fixed a gear wheel 15 through which can be applied a drive to rotate the spindle 14.
  • this spindle 14 To the upper end of this spindle 14 is fixed a plate 16 which forms a base for the support of the coil 2 and the rotating parts by which the string is applied to the wire.
  • the rotating parts are enclosed in the usual manner in a stationary cylindrical guard, not shown, attached to the base 8 by means of a radial bracket 41 of which parts are shown in Figure 1.
  • An extension 17 of the rotatable hollow spindle 14 above the plate 16 closely surrounds the fixed tube 10 and is carried forward to a point above the level of the top of the coil 2.
  • a cap 38 carrying a rigid cylindrical helix 18 the inner surface of which just clears the smooth surface of the fixed cylinder 12.
  • This helix 18, as shown in Figure 3, makes three complete turns about its axis and carries at its upper end the second part 7 of the tension controlling arrangement.
  • the second part 7 of the tension controlling system comprises a plate 19 extending parallel with the axis of the wire 3 and rotatable with the helix 18 to which it is fastened.
  • One face of this plate lies in a plane substan tially through the centre line of the path of the wire.
  • the face of the plate is formed with a V-shaped groove 20 parallel with and symmetrical about the wire axis.
  • the transverse dimensions of the groove are such that about half of the section of the conductor 3 with its helical covering of string 4 lies within the groove with the string in contact with both faces of the groove.
  • a small rectangular plate 21 is carried on two hinges 22 fixed to the grooved plate 19.
  • the axis of the hinges 22 extends parallel with the axis of the wire and in such a position relative thereto that the small plate can be turned to engage the helically covered wire lying within the groove as shown in broken line in Figure 4 or can be moved into the position shown in that ligure, in full lines, to give access to the groove.
  • a knurled head 26 provided with a number of angularly spaced apertures 27 adapted to engage one at a time over a pin 28 extending axially upwards from the upper hinge mounting 29.
  • a sleeve 31 which receives the tubular centre 32 of the coil 2.
  • This tubular centre is of cardboard and of such dimension that it can be pushed by hand on to the sleeve and grips it tightly enough not to be pushed oii by the undermentioned spring.
  • the lower part of the sleeve is surrounded by a slightly concave disc 33, the concave side being uppermost.
  • grooves 34 in the disc through each of which there extends a guide-pin 35 which is fixed to and stands vertically on the main supporting plate 16.
  • the concave disc 33 is pressed upwards by a coiled spring 36 arranged co-axially with the axis of the machine and extending between the underside of the disc and the upper side of the main supporting plate 16. Heads 39 on the itl ends of the pins 35 prevent disengagement of the disc 33 when no coil 2 is in position. The pins 35 ensure that the disc 33 cannot rotate relative to the plate 16.
  • a coil 2 is placed in position on the sleeve 31 it is pressed downwards into engagement with the disc which is dcpressed until the spring 36 is compressed to the desired extent.
  • the coil 2 being of a regular cylindrical shape engages the disc 33 along its lower outer edge and the friction between the disc and the edge of the coil is determined by the spring 36.
  • the free length of the spring 36 is relatively long so that the force which it exerts does not alter greatly as the disc 33 rises a small distance as the coil is consumed and its diameter consequently decreased.
  • the guide S which is in the form of a freely rotatable wheel having its axis vertical.
  • a counter-balance weight 40 is mounted on a bracket 37 towards the outer edge of the rotating base plate 16 .
  • the guide S is in the form of a freely rotatable wheel having its axis vertical.
  • a counter-balance weight 40 As shown in Figure l the string passes from the coil 2 over this guide wheel 5 to the first part 6 of the tension controlling device.
  • the dimensions of the bracket 37 are such that the guide wheel 5 is in a position approximately level with the mean height of the coil 2.
  • the operation of the device is as follows:
  • the string passes outward from the coil 2 to the guide pulley 5 and then inward from this pulley to the lower end of the helix 18 rotating ⁇ with the guide about the wire.
  • it is wound on the smooth surface of the fixed tubular member 12, ⁇ following the three turns of the helix 18, and from the other end of the helix it enters along an approximately vertical path between the two pressure plates 19 and 21.
  • the smooth surface of the stationary cylindrical member 12 acts as a capstan which draws the string from the coil 2 over the guide wheel 5 as the latter rotates about the axis of the device.
  • the rotating helix 18 acts as ⁇ a ⁇ long fleeting knife to produce a continuous axial movement of the turns of the string along the stationary cylindrical surface.
  • the helix 18 at the same time determines the regularity of the pitch of the turns of string.
  • the initial tension in the string is determined by the friction between the coil 2 and the concave disc 33.
  • the grip of the string on the surface ⁇ of the cylindrical member 12 provides the necessary force to draw the string from the coil 2.
  • the diameter of the cylindrical member 12 is greater than that of the wire 3 and the pitch of the helix 1h is so chosen in relation to the pitch of the turns of string on the wire that one turn of the string on the member 12 is longer than one turn of the string on the wire.
  • the invention is applicable to a number of cases of the helical lapping of a iiexible member about a circular core.
  • the member to be lapped must have appreciable thickness so that the helical lieeting device can act upon its side so as to move it axially along the smooth surface on which it is supported in the first part of the applying means.
  • a friction brake for applying the string under constant tension to the wire, a capstan coaxial with the path of the wire for drawing the string from a coil, the capstan barrel being a stationary non-rotatable smooth surfaced cylinder, a carrier guide rotatable about said capstan to lap the string on said cylinder from one end in a large arc, and means rotatable with said carrier guide for moving the string axially along said cylinder to deliver it at the other end to said friction brake, said capstan accommodating in one turn of string a greater length than in one turn of string on the wire so that there is a tendency for said capstan to overfeed the string with consequent slipping of the string on said cylinder and reduction of the string tension to a negligible value at its delivery from the capstan.
  • a friction brake for applying the string to the wire under constant tension
  • a capstan coaxial with the path of the wire for drawing the string from a coil
  • the capstan barrel being a station ary non-rotatable smooth surfaced cylinder
  • a carrier guide rotatable about said capstan to lap the string on said cylinder from one end in a large arc
  • a fleeting member surrounding said cylinder and rotatable with said carrier guide, said fleeting member having a helical guiding face to engage and move the string axially along said cylinder to deliver it at the other end to said friction brake
  • said capstan accommodating in one turn of string a greater length than in one turn of string on the wire, so that there is a tendency to overfeed the string to the wire with consequent slipping of the string on said cylinder and reduction of the string tension to a negligible value at its delivery ⁇ from the capstan.
  • a capstan coaxial with the path of the wire for drawing the string from a coil, the capstan barrel being a stationary non-rotatable smooth surfaced cylinder, a carrier guide rotatable about said capstan to lap the string in a large arc from one end on said cylinder, means rotatable with said carrier guide for axially moving the string along the surface of said cylinder to deliver the string to a friction brake, said friction brake consisting of two members and a spring pressing them together to receive between them the wire and the string delivered by said capstan and both rotatable about the wire to apply the string thereto, said capstan ⁇ accommodating in one turn of string a greater length than in one turn of string on the wire, so that there is a tendency to overfeed the string to the wire with consequent slipping or' the string on said cylinder and reduction of the string tension to a negligible value at the entry to the friction brake.
  • a capstan having a stationary non-rotatable smooth surface-d cylindrical barrel coaxial with the path lof the wire and having a rotatable fleeting guide to continuously displace axially along said barrel string lapped thereon, a carrier guide rotatable with the fleeting guide to lap string drawn from a coil in a large arc from one end on said barrel, a friction brake rotatable with the fleeting guide to receive the string from said capstan and lap it about the wire, said friction brake consisting of a support plate having a groove coextensive with the path of the wire and a spring-loaded plate acting towards said support plate to exert pressure on the lapping of string passing between and in rubbing Contact with the surfaces of the groove and pressure the spring loaded plate, the capstan accommodating in one turn of string a greater length than in one turn of string on the wire so that slipping of the string on said barrel reduces the string tension to a very low value at the entry to the friction
  • a capstan with a stationary smooth surfaced cylindrical barrel enclosing the path of the wire, a carrier guide rotatable about the barrel to lap the string over a large arc on the barrel ⁇ from one end thereof, means rotatable with said carrier guide for producing axial sliding movement of the string along the barrel to deliver it therefrom at the other end, a friction brake to receive the string from the capstan and to helically lap the string with constant tension on the wire, and the barrel accommodating more string in one turn than in one turn on the wire so that the string tension is negligible as it leaves the capstan.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Adornments (AREA)
  • Ropes Or Cables (AREA)
US472993A 1953-12-08 1954-12-03 Helical lapping apparatus Expired - Lifetime US2805539A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34121/53A GB749137A (en) 1953-12-08 1953-12-08 Improved means for helically lapping a string or similar member on a wire or equivalent member

Publications (1)

Publication Number Publication Date
US2805539A true US2805539A (en) 1957-09-10

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ID=10361628

Family Applications (1)

Application Number Title Priority Date Filing Date
US472993A Expired - Lifetime US2805539A (en) 1953-12-08 1954-12-03 Helical lapping apparatus

Country Status (4)

Country Link
US (1) US2805539A (ja)
BE (1) BE533922A (ja)
FR (1) FR1117474A (ja)
GB (1) GB749137A (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137985A (en) * 1962-07-02 1964-06-23 Gen Electric Taping head
US3672142A (en) * 1970-03-27 1972-06-27 American Chain & Cable Co Winding apparatus and method
CN115491914A (zh) * 2022-03-22 2022-12-20 张挺 一种具备沟壑毛刺处理效果的麻绳除刺器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1537638A (en) * 1924-06-06 1925-05-12 Rudolph H Jenny Tension device for wrapping and twisting machines
US1934363A (en) * 1932-03-30 1933-11-07 New England Butt Company Winding machine
US1949484A (en) * 1932-11-11 1934-03-06 Metal Textile Corp Gimping machine
US2782138A (en) * 1953-05-22 1957-02-19 Anaconda Wire & Cable Co Wire taping machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1537638A (en) * 1924-06-06 1925-05-12 Rudolph H Jenny Tension device for wrapping and twisting machines
US1934363A (en) * 1932-03-30 1933-11-07 New England Butt Company Winding machine
US1949484A (en) * 1932-11-11 1934-03-06 Metal Textile Corp Gimping machine
US2782138A (en) * 1953-05-22 1957-02-19 Anaconda Wire & Cable Co Wire taping machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137985A (en) * 1962-07-02 1964-06-23 Gen Electric Taping head
US3672142A (en) * 1970-03-27 1972-06-27 American Chain & Cable Co Winding apparatus and method
CN115491914A (zh) * 2022-03-22 2022-12-20 张挺 一种具备沟壑毛刺处理效果的麻绳除刺器
CN115491914B (zh) * 2022-03-22 2023-10-31 张挺 一种具备沟壑毛刺处理效果的麻绳除刺器

Also Published As

Publication number Publication date
BE533922A (ja)
FR1117474A (fr) 1956-05-23
GB749137A (en) 1956-05-16

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