US3903935A - Wire wrapping apparatus - Google Patents

Wire wrapping apparatus Download PDF

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Publication number
US3903935A
US3903935A US387296A US38729673A US3903935A US 3903935 A US3903935 A US 3903935A US 387296 A US387296 A US 387296A US 38729673 A US38729673 A US 38729673A US 3903935 A US3903935 A US 3903935A
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US
United States
Prior art keywords
wire
terminal
mandrel
wrapped
bore
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
US387296A
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English (en)
Inventor
Walter Evelyn Brooke Boothby
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Post Office
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Post Office
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Filing date
Publication date
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Application granted granted Critical
Publication of US3903935A publication Critical patent/US3903935A/en
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY reassignment BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY THE TELECOMMUNICATIONS ACT 1984 (NOMINATED COMPANY) ORDER 1984 Assignors: BRITISH TELECOMMUNICATIONS
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY reassignment BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY THE BRITISH TELECOMMUNICATIONS ACT 1984. (1984 CHAPTER 12) Assignors: BRITISH TELECOMMUNICATIONS
Assigned to BRITISH TELECOMMUNICATIONS reassignment BRITISH TELECOMMUNICATIONS THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981 (SEE RECORD FOR DETAILS) Assignors: POST OFFICE
Assigned to BRITISH TELECOMMUNICATIONS reassignment BRITISH TELECOMMUNICATIONS THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981 (SEE RECORD FOR DETAILS) Assignors: POST OFFICE
Assigned to BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY reassignment BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY THE BRITISH TELECOMMUNICATION ACT 1984. (APPOINTED DAY (NO.2) ORDER 1984. Assignors: BRITISH TELECOMMUNICATIONS
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/033—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wrapping or unwrapping wire connections
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor
    • Y10T29/53209—Terminal or connector
    • Y10T29/53213—Assembled to wire-type conductor

Definitions

  • This invention relates to apparatus for making electrical connections by means of wrapped joints.
  • the present invention provides thrust means on the mandrel which, during a rotation of the mandrel, cooperates with the last-wrapped turn of wire on the terminal to produce axial movement of the mandrel relative to the terminal by a predetermined distance at least equal to the diameter of the wrapped wire, so that overwrapping is avoided.
  • apparatus for wrapping serially axially disposed turns of wire onto an axially extending terminal to make an electrical connection therewith, said apparatus comprising a wrapping mandrel rotatable in a first direction to wrap said wire and having a bore formed in a forward end thereof, the bore extending rearwardly to receive the terminal, a recess defined by a wall extending at least partly around said bore to compress wrapped wire onto the terminal and a wire feed aperture adja cent the bore, wherein the mandrel is formed with thrust means within said recess adapted to co-operate with a last-wrapped turn of wire on the terminal to progress the mandrel axially along the terminal as the mandrel is rotated to wrap the wire.
  • the thrust means comprises a forwardly projecting step and a cam surface extending from the step generally rearwardly and around said bore in said first direction to be co-operatively engageable with said last-wrapped turn.
  • the top of this step will engage the last-wrapped turn of wire on the terminal and will follow the conformation of this turn as the mandrel is rotated so as to cause the mandrel to be axially progressed. It is preferred that adjacent turns of wrapped wire be axially compressed together in tight mutual contact and preferably, therefore, the height of the step is less than the thickness of the wire to be wrapped.
  • the cam surface may be so formed as to ensure that the thrust means has area contact rather than point contact with the wrapped strand. This may be done by forming the cam surface as a helix of pitch equal to the height of the step. In this way, in use, the whole of the cam surface will, when at least one turn of wire has been wrapped on the terminal, be in contact with the lastwrapped turn of wire and the wire will be wrapped generally in the form of a helix equal in pitch to that of the helically formed cam surface.
  • FIG. 1 is an isometric view of a wrapping mandrel embodying the invention
  • FIG. 2 is a plan view of part of a wrapping tool embodying the invention.
  • FIG. 3 is an end elevation corresponding to FIG. 2.
  • FIG. 1 shows a wrapping mandrel indicated generally at 10.
  • the mandrel 10 is generally cylindrical and is formed in its forward end with a bore 12 and a wire feed aperture 14 having a slot 16 extending therefrom.
  • Means is provided for rotating the mandrel 10 about the axis, indicated at 18, of the bore 12.
  • the bore 12 extends rearwardly to receive an axially extending square cross-section terminal 22 and the mandrel 10 is rotatable about the axis 18 in a first direction indicated by the arrow 20 to wrap turns of wire onto the terminal 22 to make an electrical connection therewith.
  • thrust means indicated generally at 24 and comprising a forwardly projecting step 26 and a helically formed cam surface 28 extending therefrom generally rearwardly and around the bore 12 in the direction of arrow 20.
  • the mode of operation of the apparatus will now be described.
  • a length of wire 47, having one end thereof secured, is located in the wire feed aperture 14 by way of the slot 16 and the mandrel 10 is located on the terminal 22 with the terminal 22 received in the bore 12.
  • the mandrel 10 is then rotated in the direction of arrow 20 so that the portion of the wire 47 located in the aperture 14 is carried around the terminal 22. Since one end of the wire is secured,- this rotation causes the wire to be fed through the aperture 14 and wrapped on the terminal 22.
  • the cam surface 28 engages the wire wrapped on the terminal and progresses the mandrel axially along the terminal, that is in the direction of arrow 30, as will now be described in more detail.
  • the wire 47 is fed through the aperture 14 to an area in the region of a point on the mandrel 10 indicated at 32, and from there on to the terminal 22.
  • the forward projection t of the thrust means 24 immediately adjacent point 32 is relatively small but increases progressively around the mandrel in a direction opposite to that of arrow 20.
  • each portion of the wrapped wire is engaged by successively thicker portions of the thrust means 24.
  • the mandrel 10 will be axially progressed along the terminal in the direction of arrow 30 as it is rotated in the direction of arrow 20.
  • the mandrel has now wrapped one complete turn of wire upon the terminal 22 and is about to commence .wrapping a second turn. If the height h of the step 26 is equal to the thickness of the wire wrapped on the terminal, the second turn of wire will be just contiguous with the first turn and thus the aforedescribed process will be repeated for the second and each succeeding turn of wire. It is preferred, however, that the turns of wire be axially compressed together along the terminal 22, and this is effected by making the height h somewhat less than the thickness of the wire wrapped on the terminal.
  • the bore 12 and wire feed aperture 14 are located within a generally U-shaped recess, indicated generally at 34, in the end face 36 of the mandrel 10 and in use the inner wall of the recess 34 has the effect of guiding wire around a terminal located in the bore 12 and ensuring that the wire is tightly wrapped thereon.
  • the recess 34 is so dimensioned and arranged that the corners of a terminal located in the bore 12 are spaced from the inner wall of the recess 34 by a distance approximately 15% less than the thickness of the wire wrapped on the terminal.
  • the mandrel 10 is especially intended for use with insulated wire and the slot 16 extending from the wire feed aperture 14 has its opposite sides convergent and sharp-edged so as to nick and engage the insulation covering the wire, so that when the wire is drawn through the aperture 14, as hereinbefore described, the insulation is stripped therefrom and the wrapped wire is bare.
  • Previously bare wire can be wrapped without stripping.
  • the insulation isintractably attached thereto and in such cases it is pbssible for a satisfactory wrapped joint to be made withoutstripping the wire by use of the mandrel 10, the rec es s 34 compressing the wire onto the terminal so tightly that the corners of the terminal pierce the insulation and make electrical contact with the conductive core of the wire.
  • the mandrel 10 has a threaded end indicated at 38 and a recessed washer 40 is secured thereon by means of a tapered, internally threaded nut 42.
  • the washer 40 has a bore formed to engage a flat 44 on the threaded end 38 to provide an angular location for the washer.
  • a recess 46 in the washer 40 is adapted to receive the length of wire 47 which in use is drawn through the aperture l4 and wrapped on the terminal 22.
  • the threaded end 38 is screwed into an end of a shaft 48 which is a sliding fit in a bore in an intermediate shaft 52 and is axially retained therein by a grub screw (not shown) which also serves to locate a knurled collar 56 on the shaft 52.
  • Rotatable on the shaft 52 is a further, hollow shaft 50 having ashoulder 54 axially adjacent the knurled collar 56.
  • the collar 56 and shoulder 54 are formed with slots 58 and 60 and in use these slots are aligned, the wire 47 is laid therein, and the collar 56 is rotated to cut the wire 47 by a guillotining action as the slot 58 is moved relative to the slot 60.
  • a predetermined length of wire will be drawn through the aperture 14 and wrapped on the terminal 22.
  • the mandrel 10 may be axially adjusted relative to the collar 56 and the shoulder 54 by slackening the grub screw.
  • Other mandrels, having different bore sizes, may be used to accomodate terminals of different sizes.
  • the end of the shaft 50 which is remote from the shoulder 54 is provided with means, not shown, for engaging suitable means for rotating the mandrel and shaft assembly.
  • suitable means may comprise, for instance, a wire wrapping gun.
  • the invention provides means for making electrical connections 'by way of wrapped joints wherein turns of wire are wrapped on a terminal in such a way as to be serially axially disposed, so that over-wrapping is avoided.
  • Apparatus for wrapping serially axially disposed turns of wire onto an axially extending terminal to make an electrical connection therewith said appara tus comprising a wrapping mandrel rotatable in a first direction to wrap said Wire and having a bore formed in a forward end thereof, said bore extending rearwardly to receive the terminal, a recess defined by a wall extending at least partially about said bore to compress wrapped wire onto the terminal, said recess having a wire feed aperture adjacent said bore with said aperture terminating in a slot with the sides defining said slot being convergent with respect to one another for engaging and stripping insulation from the wire drawn through said aperture, wherein the mandrel is formed with thrust means comprising a forwarding projecting step formed ahead of the wire feed aperture in said first direction and a cam surface extending from said step generally rearwardly and around said bore in said first direction to be co-operatively engaged with a lastwrapped turn of wire on the terminal to progress the mandrel along the terminal as the mand

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
US387296A 1972-08-15 1973-08-10 Wire wrapping apparatus Expired - Lifetime US3903935A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3794472A GB1416536A (en) 1972-08-15 1972-08-15 Wire rwapping apparatus

Publications (1)

Publication Number Publication Date
US3903935A true US3903935A (en) 1975-09-09

Family

ID=10400124

Family Applications (1)

Application Number Title Priority Date Filing Date
US387296A Expired - Lifetime US3903935A (en) 1972-08-15 1973-08-10 Wire wrapping apparatus

Country Status (5)

Country Link
US (1) US3903935A (no)
JP (1) JPS49124589A (no)
AU (1) AU5913573A (no)
DE (1) DE2340951A1 (no)
GB (1) GB1416536A (no)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967661A (en) * 1975-09-17 1976-07-06 Vector Electronic Company Insulation slitting and wire wrapping tool
US4000764A (en) * 1975-03-27 1977-01-04 The Globe Tool And Engineering Company Stator lead termination apparatus
US4069845A (en) * 1976-06-24 1978-01-24 Derek Ward Wire wrapping apparatus
US4195401A (en) * 1977-11-07 1980-04-01 Cooper Industries, Inc. Conductor unwrapping bit
US20120006166A1 (en) * 2010-04-28 2012-01-12 Ryan Michael C Ground anchor strap puller, tensioner and cutter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107431301B (zh) 2015-02-06 2021-03-30 迈心诺公司 与医疗传感器一起使用的具有伸缩针的连接器组件
KR102609605B1 (ko) 2015-02-06 2023-12-05 마시모 코오퍼레이션 광 프로브를 위한 폴드 플렉스 회로

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746124A (en) * 1951-12-28 1956-05-22 Bell Telephone Labor Inc Wire wrapping tool for coated wire
US2758797A (en) * 1952-05-09 1956-08-14 Western Electric Co Tool for winding wire on terminals
US2926859A (en) * 1954-05-11 1960-03-01 Gardner Denver Co Wire connecting tool
US3077211A (en) * 1960-12-23 1963-02-12 Ibm Wire wrapping tool
US3095913A (en) * 1959-05-29 1963-07-02 Gen Electric Co Ltd Devices for wrapping and removing wrapped connections
US3244202A (en) * 1963-12-05 1966-04-05 Ibm Wire wrapping devices
US3531056A (en) * 1967-11-16 1970-09-29 Gardner Denver Co Conductor wrapping bit
US3625262A (en) * 1969-05-29 1971-12-07 Gardner Denver Co Conductor wrapping bit and method for forming a surface thereon
US3781932A (en) * 1971-12-16 1974-01-01 Gardner Denver Co Cutting, stripping, and wrapping bit for insulated conductor wire
US3803649A (en) * 1971-05-21 1974-04-16 Plessey Handel Investment Ag Devices for making wrapped-wire connections

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2746124A (en) * 1951-12-28 1956-05-22 Bell Telephone Labor Inc Wire wrapping tool for coated wire
US2758797A (en) * 1952-05-09 1956-08-14 Western Electric Co Tool for winding wire on terminals
US2926859A (en) * 1954-05-11 1960-03-01 Gardner Denver Co Wire connecting tool
US3095913A (en) * 1959-05-29 1963-07-02 Gen Electric Co Ltd Devices for wrapping and removing wrapped connections
US3077211A (en) * 1960-12-23 1963-02-12 Ibm Wire wrapping tool
US3244202A (en) * 1963-12-05 1966-04-05 Ibm Wire wrapping devices
US3531056A (en) * 1967-11-16 1970-09-29 Gardner Denver Co Conductor wrapping bit
US3625262A (en) * 1969-05-29 1971-12-07 Gardner Denver Co Conductor wrapping bit and method for forming a surface thereon
US3803649A (en) * 1971-05-21 1974-04-16 Plessey Handel Investment Ag Devices for making wrapped-wire connections
US3781932A (en) * 1971-12-16 1974-01-01 Gardner Denver Co Cutting, stripping, and wrapping bit for insulated conductor wire

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000764A (en) * 1975-03-27 1977-01-04 The Globe Tool And Engineering Company Stator lead termination apparatus
US3967661A (en) * 1975-09-17 1976-07-06 Vector Electronic Company Insulation slitting and wire wrapping tool
US4069845A (en) * 1976-06-24 1978-01-24 Derek Ward Wire wrapping apparatus
US4195401A (en) * 1977-11-07 1980-04-01 Cooper Industries, Inc. Conductor unwrapping bit
US20120006166A1 (en) * 2010-04-28 2012-01-12 Ryan Michael C Ground anchor strap puller, tensioner and cutter
US10300620B2 (en) * 2010-04-28 2019-05-28 Michael C. Ryan Ground anchor strap puller, tensioner and cutter

Also Published As

Publication number Publication date
JPS49124589A (no) 1974-11-28
DE2340951A1 (de) 1974-02-28
AU5913573A (en) 1975-02-13
GB1416536A (en) 1975-12-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Free format text: THE BRITISH TELECOMMUNICATIONS ACT 1984. (1984 CHAPTER 12);ASSIGNOR:BRITISH TELECOMMUNICATIONS;REEL/FRAME:004976/0291

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS

Free format text: THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981;ASSIGNOR:POST OFFICE;REEL/FRAME:004976/0248

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Free format text: THE BRITISH TELECOMMUNICATION ACT 1984. (APPOINTED DAY (NO.2) ORDER 1984.;ASSIGNOR:BRITISH TELECOMMUNICATIONS;REEL/FRAME:004976/0259

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY

Free format text: THE TELECOMMUNICATIONS ACT 1984 (NOMINATED COMPANY) ORDER 1984;ASSIGNOR:BRITISH TELECOMMUNICATIONS;REEL/FRAME:004976/0276

Effective date: 19871028

Owner name: BRITISH TELECOMMUNICATIONS

Free format text: THE BRITISH TELECOMMUNICATIONS ACT 1981 (APPOINTED DAY) ORDER 1981;ASSIGNOR:POST OFFICE;REEL/FRAME:004976/0307

Effective date: 19871028