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US3792398A - Bobbin end plate with means for fastening of soldering tabs - Google Patents

Bobbin end plate with means for fastening of soldering tabs Download PDF

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Publication number
US3792398A
US3792398A US00361198A US3792398DA US3792398A US 3792398 A US3792398 A US 3792398A US 00361198 A US00361198 A US 00361198A US 3792398D A US3792398D A US 3792398DA US 3792398 A US3792398 A US 3792398A
Authority
US
United States
Prior art keywords
branch
end plate
bobbin
grooves
connecting wires
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
US00361198A
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English (en)
Inventor
A Norlin
A Olsson
T Strid
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of US3792398A publication Critical patent/US3792398A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H01H50/443—Connections to coils

Definitions

  • ABSTRACT An end plate for a bobbin comprising a L-shaped piece of an insulating material the first branch of which having a through hole for a core and a number of grooves for connecting wires to windings of the bobbin and the second branch of the end plate having notches for placing soldering tabs, each groove in the first branch emerging into a notch in the other branch, the emerging point having the form of a narrow mouth which the connecting wires pass on their way to the soldering tabs and which after the bobbin windings are completed are closed, thus locking connecting wires to thebottom of the notches.
  • Coils according to the invention have one L-shaped end plate.
  • One of the branches of the end plate is provided with a through hole for the coil core and in its other branch parallel notches are arranged for placing of soldering tabs. From these grooves connecting wires pass to the winding with which the completed coil is provided. Apart from the connecting wire to the outer I winding layer each connecting wire will be crossed by the winding turns in each winding layer closest to the end plate. When the coil is in operation considerable potential differences can arise between the connecting wires and the adjacent winding turns due to selfinduction in the coil with flash-over, ruined insulation and short-circuit as a result.
  • the connecting wires have been covered with insulating glue patches upon the winding of the coils and this has prevented the connecting wires from getting into contact with adjacent winding turns. During the winding operation, however, it easily happens that a glue patch falls off and comes in between the winding turns. When the winding of a coil is completed, it is not always possible to see, whether the glue patches are still where they should be or have come into the winding. To avoid this moment of uncertainty it has gradually become more common to place the connecting wires in grooves arranged in the bobbin end plate.
  • each connecting wire is kept stretched between the soldering tab and the winding and then follows the bottom of the groove, but in order that the connecting wires should withstand the transport of the completed coil as well as the movements arising within the coil upon operationdue to temperature changes, it is suitable to slacken the connecting wires.
  • a connecting wire has been slackened, however, it easily comes into touch with adjacent winding turns and the flash-over risk is greater for this kind of coils than for coils in which the connecting wires have been insulated by means of glue patches.
  • the purpose of the present invention is to eliminate the above mentioned inconveniences and this is attained thereby that the bobbin end plate has obtained the characteristics stated in the claims.
  • FIG. 1 shows a first branch of a bobbin end plate in flat view
  • FIG. 2 shows an end plate in sectional view and partly cut away together with part of the appertaining coil core and winding and 7
  • FIG. 3 shows a second branch of the same end plate and part of the appertaining winding.
  • reference I is the common reference for grooves arranged in the end plate for connecting wires to the windings of the completed coil.
  • the grooves which emerge .into notches 2, have been formedwith a view to the fact that at varying core diameters and winding hights the connecting wires should easily and without sharp bends slide down into the grooves and be protected therein against adjacent winding turns.
  • soldering tabs are arranged, in the figure represented by the tabs 3 and 4 which for facilitating the soldering operation in connection with the winding are bent upwards from their respective notches.
  • FIG. 2 shows a bobbin end plate in sectional view and partly cut away, the cutting following the groove emerging into the notch with the soldering tab 3.
  • FIG. 2 alsothe end part of a core 4 with appertaining winding 5 is shown, on which core the bobbin end plate is arranged.
  • Reference 6 denotes a connecting wire following the bottom of the groove from the winding 5 to the point, where the groove emerges into the notch, from where the wire is freely tightened to the soldering tab 3.
  • FIG. 3 shows the other branch of the same bobbin end plate in flat view with part of the winding 5 and its connecting wires 6 and 7 connected to the soldering tabs 3 and 4.
  • FIG. 3 also shows the mouths 8 of the grooves in the notches 2, which mouths in the shown embodiment are arranged next to one side of the respective notch.
  • the connecting wires are slackened by the soldering tabs being bent down towards the bottom of the notches. To prevent that the connecting wires come into touch with adjacent winding turns, as is often the case in known bobbin end plate constructions, the
  • groove mouths are according to the invention closed before the soldering tabs are bent downwards.
  • the closing of the mouths of the grooves has been made by means of a warm pointed tool which has been pressed against the bottom of the notches in question at 9 and 10, the material in the bottom of the notches having flown out and closed the mouths.
  • the shape of the grooves which have narrow mouths one advantage is that the mouths are easily closed and another is that the bottoms of the notches at the side of the mouths contain sufficient material for making possible warming and closing of the grooves.
  • the grooves may of course also be closed in other ways, e.g. by means of a drop of glue or by pressing in of a wedgeshaped piece of plastic.
  • End plate for a bobbin mainly intended for relays, comprising a L-shaped piece of an insulated material, in the first branch of which a through hole for the coil core is arranged as well as a number of grooves for placing connecting wires to windings with which the bobbin is intended to be provided and in the other branch of which parallel notches are arranged in the width of the notches.
  • End plate for a bobbin according to claim 1, wherein said mouths of the grooves are arranged next to one side of the respective notch.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Electromagnets (AREA)
US00361198A 1972-06-19 1973-05-17 Bobbin end plate with means for fastening of soldering tabs Expired - Lifetime US3792398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE08070/72A SE356156B (xx) 1972-06-19 1972-06-19

Publications (1)

Publication Number Publication Date
US3792398A true US3792398A (en) 1974-02-12

Family

ID=20273067

Family Applications (1)

Application Number Title Priority Date Filing Date
US00361198A Expired - Lifetime US3792398A (en) 1972-06-19 1973-05-17 Bobbin end plate with means for fastening of soldering tabs

Country Status (10)

Country Link
US (1) US3792398A (xx)
BE (1) BE801107A (xx)
DE (1) DE2329529A1 (xx)
DK (1) DK138468B (xx)
FR (1) FR2189853B1 (xx)
GB (1) GB1422988A (xx)
IT (1) IT989284B (xx)
NL (1) NL7307893A (xx)
NO (1) NO132510C (xx)
SE (1) SE356156B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229722A (en) * 1979-07-02 1980-10-21 Rca Corporation Wire coil assembly for an electrical circuit
US4700167A (en) * 1986-08-29 1987-10-13 General Signal Corporation Bobbin construction with strain relief
US4745388A (en) * 1987-02-02 1988-05-17 American Telephone And Telegraph Company, At&T Bell Laboratories Transformer with wire lead isolation slots
US5412367A (en) * 1990-07-31 1995-05-02 Nippon Densan Corporation Transformer
US6252484B1 (en) * 1997-07-09 2001-06-26 Funai Electric Co., Ltd. Transformer
EP3367413A1 (en) * 2014-07-28 2018-08-29 Fujitsu Component Limited Electromagnetic relay and coil terminal
US12009143B2 (en) * 2018-08-08 2024-06-11 Endress+Hauser Flowtec Ag Method of producing a coil device, coil device, measuring transducer with coil device, instrument having a measuring transducer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3030487A1 (de) * 1980-08-12 1982-03-25 Siemens AG, 1000 Berlin und 8000 München Auf einem vorgegebenen wickelkoerper aufgebrachte, ueberlappungsfreie, einlagige zylinderwicklung
DE3043148C2 (de) * 1980-11-15 1984-04-26 Danfoss A/S, Nordborg Spulenanordnung, insbesondere für Relais, und Verfahren zu ihrer Herstellung
DE3432812A1 (de) * 1984-09-06 1986-03-13 Siemens AG, 1000 Berlin und 8000 München Spulenkoerper fuer insbesondere einlagige zylinderspulen der hochfrequenz- und nachrichtentechnik
DE3433003A1 (de) * 1984-09-07 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Spulenkoerper fuer insbesondere einlagige zylinderspulen der hochfrequenz- und nachrichtentechnik
FR2586855B1 (fr) * 1985-09-05 1987-11-27 Paris & Du Rhone Bobine de solenoide a double enroulement, notamment pour actionneur de demarreur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1984036A (en) * 1932-10-12 1934-12-11 Western Electric Co Electrical insulating device having a terminal thereon and a method of making it
US3117294A (en) * 1964-01-07 Bobbin with insulated lead-in means
US3189772A (en) * 1962-11-28 1965-06-15 Gen Electric Coil bobbin for an electric clock
US3265999A (en) * 1964-05-26 1966-08-09 Bell Telephone Labor Inc Bobbin with slotted flange for terminal access
US3315198A (en) * 1964-04-09 1967-04-18 Philips Corp Coil and lead-in wire connection
US3457534A (en) * 1967-05-23 1969-07-22 Hermetic Coil Co Inc Electrical coil
US3671906A (en) * 1970-10-29 1972-06-20 John Barry Hodges Winding formers for use in the manufacture or rotor assemblies for dynamo electric machines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117294A (en) * 1964-01-07 Bobbin with insulated lead-in means
US1984036A (en) * 1932-10-12 1934-12-11 Western Electric Co Electrical insulating device having a terminal thereon and a method of making it
US3189772A (en) * 1962-11-28 1965-06-15 Gen Electric Coil bobbin for an electric clock
US3315198A (en) * 1964-04-09 1967-04-18 Philips Corp Coil and lead-in wire connection
US3265999A (en) * 1964-05-26 1966-08-09 Bell Telephone Labor Inc Bobbin with slotted flange for terminal access
US3457534A (en) * 1967-05-23 1969-07-22 Hermetic Coil Co Inc Electrical coil
US3671906A (en) * 1970-10-29 1972-06-20 John Barry Hodges Winding formers for use in the manufacture or rotor assemblies for dynamo electric machines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229722A (en) * 1979-07-02 1980-10-21 Rca Corporation Wire coil assembly for an electrical circuit
US4700167A (en) * 1986-08-29 1987-10-13 General Signal Corporation Bobbin construction with strain relief
US4745388A (en) * 1987-02-02 1988-05-17 American Telephone And Telegraph Company, At&T Bell Laboratories Transformer with wire lead isolation slots
US5412367A (en) * 1990-07-31 1995-05-02 Nippon Densan Corporation Transformer
US6252484B1 (en) * 1997-07-09 2001-06-26 Funai Electric Co., Ltd. Transformer
EP3367413A1 (en) * 2014-07-28 2018-08-29 Fujitsu Component Limited Electromagnetic relay and coil terminal
US10242829B2 (en) 2014-07-28 2019-03-26 Fujitsu Component Limited Electromagnetic relay and coil terminal
US11120961B2 (en) 2014-07-28 2021-09-14 Fujitsu Component Limited Electromagnetic relay and coil terminal
US12009143B2 (en) * 2018-08-08 2024-06-11 Endress+Hauser Flowtec Ag Method of producing a coil device, coil device, measuring transducer with coil device, instrument having a measuring transducer

Also Published As

Publication number Publication date
BE801107A (fr) 1973-10-15
NO132510C (xx) 1975-11-19
AU5598373A (en) 1974-11-28
GB1422988A (en) 1976-01-28
FR2189853A1 (xx) 1974-01-25
IT989284B (it) 1975-05-20
DE2329529A1 (de) 1974-01-10
DK138468C (xx) 1979-02-19
DK138468B (da) 1978-09-11
NO132510B (xx) 1975-08-11
NL7307893A (xx) 1973-12-21
FR2189853B1 (xx) 1977-02-11
SE356156B (xx) 1973-05-14

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