US3120988A - Bellows-type contact construction - Google Patents

Bellows-type contact construction Download PDF

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Publication number
US3120988A
US3120988A US197743A US19774362A US3120988A US 3120988 A US3120988 A US 3120988A US 197743 A US197743 A US 197743A US 19774362 A US19774362 A US 19774362A US 3120988 A US3120988 A US 3120988A
Authority
US
United States
Prior art keywords
contact
section
terminal portion
bellows
sections
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
US197743A
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English (en)
Inventor
Gilbart Leon
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.)
CONTINENTAL CONNECTOR CORP
Original Assignee
CONTINENTAL CONNECTOR CORP
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 NL284033D priority Critical patent/NL284033A/xx
Priority to BE622783D priority patent/BE622783A/xx
Application filed by CONTINENTAL CONNECTOR CORP filed Critical CONTINENTAL CONNECTOR CORP
Priority to US197743A priority patent/US3120988A/en
Priority to GB33063/62A priority patent/GB945732A/en
Priority to DEC27821A priority patent/DE1204297B/de
Priority to FR909776A priority patent/FR1335302A/fr
Application granted granted Critical
Publication of US3120988A publication Critical patent/US3120988A/en
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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/26—Pin or blade contacts for sliding co-operation on one side only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H01R13/415—Securing in non-demountable manner, e.g. moulding, riveting by permanent deformation of contact member

Definitions

  • My Patent 2,875,425 of February 24, 1959, entitled Multiple Electrical Connector is assigned to the assignce of the instant patent. it discloses a multiple electrical connector, particularly of the miniature type, which comprises a jack or receptacle designed to receive printed circuit cards or plug The receptacle is provided with multiple miniature contact elements which engage with mating terminal .portions on the printed circuit card or plug when the latter is inserted into the receptacle.
  • the aforementioned Patent 2,875,425 featured miniature contact elements in the receptacle which were i iade of strip spring stock, and were constructed to act as compressio springs, more particularly bellows-type compression springs.
  • the bellows-shaped part of those contact elements was formed of a plurality of branches or sections, the outermost of which was adapted to make contact with the circuit element or contact of the printed circuit card or plug, that outermost section or branch being electrically connected to the terminal portion of the contact by means of an intermediate branch or section and an inner branch or section, those two sections being serially electrically connected between the outermost or contact sccion land the terminal portion.
  • the terminal portion of the contact is provided with a conductive element which resiliently engages either the outermost branch of the contact unit or the intermediate branch thereof, preferably adjacent the lower end of the engaged branch, thereby defining a direct conductive path between the terminal portion of the contact and the outer branch thereof, through which path the signal can flow.
  • a conductive element which resiliently engages either the outermost branch of the contact unit or the intermediate branch thereof, preferably adjacent the lower end of the engaged branch, thereby defining a direct conductive path between the terminal portion of the contact and the outer branch thereof, through which path the signal can flow.
  • the resilient force exerted by the newly added conductive element acts on the outermost bran h or section of the contact to urge it to firm and reliable connection, both physical and electrical, with the mating terminal portions on the printed circuit card or plug.
  • the present invention relates to the construction of the bellows-type contact and the multiple electrical connector in which it is employed, as defined in the appended claims and as described in this specification, taken together with the accompanying drawings, in which:
  • H6. 1 is a three-quarter perspective view of a multiple electrical connector made according to the present invention and shown in combination with a printed circuit plug assembly, with parts shown in cross-section;
  • FIG. 2 is a front p ers ec'ive view of the multiple electrical connector with the contract units in slace;
  • FIG. 3 is a View shown to an enlarged scale corresponding to the cross sectional part of FIG. 1 of the drawings, but with the printed circuit plug assembly removed, and
  • FIG. 4 is a view similar to FIG. 3, but showing a typical printed circuit plug assembly in iposition
  • FIG. 5 is a View similar to FIG. 3, but illustrating a second contact construction
  • PEG. 6 is a view similar to FlG. 5, but with the printed circuit plug assembly in place;
  • PEG. 7 is a front elevational view of the contact unit of FIG. 5 taken in the direction of the line 7-7 of FIG. 5;
  • FIG. 8 is a view similar to FIG. 5' but showing a third embodiment of the contact construction
  • FIG. 9 is a view similar to PEG. 8, but with the printed circuit plug assembly in place;
  • FIG. 10 is a front elevational View of the contact unit of FIG. 8, taken in the direction of the line lib-lb in FIG. 8;
  • FIG. 11 is a view similar to FIG. 5 but showing a fourth embodiment of the spring unit
  • FIG. 12 is a view similar to FIG. 11, but with the printed circuit plug assembly in place;
  • FIG. 13 is a front elevational view of the contact unit of FIG. 11, taken in the direction of the line 13ll3 of FIG. 11.
  • the multiple electrical connector comprises a jack assembly generally designated I and ada nted to receive a printed circuit plug assembly P or any like plug assembly, the said jack assembly I being provided with a plurality or series of miniature contact elements 0, the printed circuit plug assembly P being provided with a plurality of circuit elements or strips c the terminii of which define terminal elements for mating cooperation with the contact elements 0 of the jack assembly I.
  • the jack assembly 3 comprises a receptacle ill made of a single molded piece of insulation formed with a central longitudinal trough 12 for receiving the plug assembly P, the said trough being defined by two op ositely facing walls 14- and to, at least one and preferably both of which walls are formed with a plurality of pockets 18, 18 spaced along the trough 12 and corresponding in number to the number or" contact elements 0, each contact element being located and partially housed by a pocket 18.
  • the walls 14 and 16 form the inside walls of said pockets 18, the side walls of said pockets being defined by ribs 20 directed inwardly of said walls.
  • the receptacle M9 is also formed at its top with shoulders 22 extending the length of the trough 12, and with a boss or protuberance 24 at its bottom also extending the length of the trough 12, for purposes that will appear hereinafter.
  • the receptacle Ml may also be rorrned with terminal lug portions 26 for the reception of attaching elements.
  • Each of the contact elements 0 comprises a bellowsshaped spring unit made from strip spring stock such as spring tempered Phosphor bronze (which may be gold plated over silver for obtaining low contact resistance), and having three branches or sections, an innermost section 28 being lodged against the inside wall such as the wall 14 or 16 of a pocket 18, an outermost branch 39 defining the contact which is engageabie by the mating terminal strip 0' of the plug assembly P, and an intermediate branch or section 32 forming a spring connection between the other two branches 2% and 30.
  • strip spring stock such as spring tempered Phosphor bronze (which may be gold plated over silver for obtaining low contact resistance)
  • three branches or sections an innermost section 28 being lodged against the inside wall such as the wall 14 or 16 of a pocket 18, an outermost branch 39 defining the contact which is engageabie by the mating terminal strip 0' of the plug assembly P, and an intermediate branch or section 32 forming a spring connection between the other two branches 2% and 30.
  • each bellows-shaped contact c is anchored in some appropriate manner to the body of the receptacle it), as by means of the struck out portion 34 located eXteriorly of the receptacle 10, and the ends 36 protruding from the receptacle 1t) and extending up into the pockets 1S define terminal ends to which conductors may be connected, as by soldering.
  • the outermost branch or section 1% of the contact c terminates at its upper end in a hook portion 38 which is engaged by and over the shoulder wall 22, the end of the hook portion 38 having a limited freedom of movement in a recess 44) formed between said shoulder wall 22 and the outer walls 4-2 of the receptacle.
  • the wall shoulder 22 forms a stop for limiting the outward movement (into the trough 12) of the top of the contact elements 0, and the boss 24 forms a stop for limiting the outward movement of the bottom of the contact elements 0.
  • the electrical engagement section of the contact element c which is preferably linear in configuration, makes contact over substantially its full face or area with the mating terminal element 0' of the printed circuit plug P.
  • the compression spring bellows contacts 0, 0 arranged as pairs on oppositely facing sides of the connector, the further result is achieved that the circuit card or plug assembly P is accurately held resiliently in the receptacle it) by the oppositely acting compression action of the contact element pairs 0, c.
  • the bellows sections moreover, makes the face of the contact section 39 follow the printed circuit, preventing circuit discontinuity under severe vibration and printed circuit board misalignment.
  • the terminal portion 36 is provided at its upper end with a conductive element 44 the lower end of which is engaged with what may be considered as the upper end of the terminal portion 36.
  • the upper and free end of the conductive element 44 engages and bears against the intermediate contact section 32, preferably adjacent the lower end thereof.
  • the conductive element is physically interposed between the contact sections and 32.
  • the terminal portion 36 is formed of two parallel parts 36a and 361), connected by integral reverse bend as, the terminal part 36a being connected to the inner contact section 28 and the terminal part 36b carrying the conductive element 44 at its upper end.
  • an ofiset portion 48 may be interposed between the conductive element 44 and the upper end of the terminal part 36b, that offset portion cooperating with a correspondingly oriented wall 50 formed at the bottom of the pocket 18.
  • the conductive element 44 When the printed circuit P is removed from the jack 1, as illustrated in FIG. 3, the conductive element 44, by virtue of its resilient action on the contact section 32, will urge the bellows contact 0 to expanded position. When a printed circuit plug P is inserted into the trough 1 2, as illustrated in FIG. 4, the bellows contact 0 will be compressed in bellows fashion.
  • the conductive element 44 will constitute a direct conductive path between the lower end of the intermediate contact section 32 and the terminal portion 36, so that the signal will not have to traverse the contact sections 32 and 23 or the reverse bend b connecting those sections. This shorter and more direct path for the signal reduces voltage drop within the contact c and minimizes inductive problems.
  • the resilient action of the conductive element 44- tends to urge the lower ends of the contact sections 32 and 30 toward the printed circuit plug P, thus aiding in the attainment of firm electrical connection between the contact c and the mating terminal strip c. This reduces voltage drop at the contact interface and improves the reliability of the contact thus made in the presence of shock or vibration.
  • FiGS. 5, 6 and 7 is in many respects similar to that of FIGS. 3 and 4, and similar parts have similar reference numerals applied thereto.
  • the contacts in FIGS. 6 and 7 differ from those in FIGS. 3 and 4 in that the outer contact sections 3th! are bifurcated by slot 52, and the intermediate contact sections 32a are bifurcated by slot 54-.
  • the lower portion of the slot 54 in the intermediate contact section 32a is widened at 56.
  • the conductive element 44a is composed of laterally outer portions 58 and a central tongue 63, the Width of the tongue ot being less than that of the widened slot portion 56 and greater than that of the slot 52 in the outer contact section 3%.
  • the laterally outer portions 58 of the conductive element 44a engage those portions or" the intermediate contact section 32. on either side of the slot 56, while the tongue 6h passes through the slot 56 and engages the lower portions of the outer contact section Ella, spanning the slot 52.
  • This construction provides parallel paths for the signal through the tongue es and the laterally outer portions 58 of the conductive element 44a respectively, with the tongue 6t) providing an even more direct conductive path for the signal than the laterally outer portions 53.
  • the laterally outer portions 58 of the conductive element 44a exert a resilient force upon the lower end of the intermediate contact section 32a in a manner similar to that shown in FIGS. 3 and 4, and in addition, the tongue 6%) exerts a resilient force in the same direction directly upon the outermost contact section 390.
  • FIGS. 11-13 is similar to that of FIGS. 3 and 4, except the terminal portion 36 is formed of but a single strip of material, with the resilient conductive element 44b being struck out from the body of the conductive strip, instead of being formed at the free end of a reverseiy bent portion thereof, as in the embodiment of FIGS. 3 and 4.
  • H68. 11l3 is similar to that of FIGS. 5-7, except that the terminal portion 36 is formed from but a single length of material and the resilient conductive element 44c is struck from the body of the spring strip.
  • the slot 540 which bifurcates the intermediate contact section 320 is, throughout its length, wider than the conductive element 440, the slot 520 which biturcates the outer conductive section 300 being smaller in width than the conductive element 44c, the latter freely passing through the slot 540 and physically and electrically engaging the contact section 300.
  • FIGS. 11-13 as specifically illustrated, there is no counterpart to the conductive element parts 58 in the embodiment of FIGS. 5 and 6, but these could be provided if desired.
  • the contact constructions here disclosed provide all of the advantages of the bellows-type contacts used in multiple electrical connectors and, in addition provide a more direct conductive path through the contact units, thereby to minimize voltage drop and undesirable inductive effects.
  • the very structure which produces these additional advantages also serves to make more secure and reliable the electrical connection between the contacts and the terminal portions of the printed circuit plug P adapted to mate therewith.
  • the constructions are such that they can be made simply and economically on a mass production basis through suitable punching, stamping and bending operations performed on spring strip material.
  • a contact comprising a terminal portion, a first section connected to said terminal portion, a second section overlying and spaced from said first section and defining a contact adapted to be engaged by a conductive portion of an external assembly, and a third section spatially located between and spaced from said first and second sections, said contact sections being formed from a strip of conductive resilient material, with said third section being physically and electrically connected between said first and second sections respectively by means including reverse bends of said strip, thereby to define a bellows-shaped spring unit; the improvement which comprises a conductive element electrically connected to said terminal portion and physically resiliently engaging at least one of said second and third contact sections, thereby to function as a comparatively direct electrical path between said second contact section and said terminal portion, said third contact section having an opening therethrough, said conductive element passing through said opening and engaging said second contact section.
  • said terminal portion comprises first and second parallel parts electrically connected to one another, said first part being conected at its upper end to said first contact section, said second part having a free upper member defining said conductive element.
  • a contact comprising a terminal portion, a first section connected to said terminal portion, a second section overlying and spaced from said first section and defining a contact adapted to be engaged by a conductive portion of an external assembly, and a third section sp atially located between and spaced from said first and second sections, said contact sections being formed from a strip of conductive resilient material, with said third section being physically and electrically connected between said first and second sections respectively by means including reverse bends of said strips, thereby to define a bellows-shaped spring unit; the improvement which com prises a conductive element electrically connected to said terminal portion and physically resiliently engaging at least one of said second and third contact sections adjacent the lower end of the engaged section, thereby to function as a comparatively direct electrical path between said second contact section and said terminal portion.

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
US197743A 1962-05-25 1962-05-25 Bellows-type contact construction Expired - Lifetime US3120988A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL284033D NL284033A (it) 1962-05-25
BE622783D BE622783A (it) 1962-05-25
US197743A US3120988A (en) 1962-05-25 1962-05-25 Bellows-type contact construction
GB33063/62A GB945732A (en) 1962-05-25 1962-08-28 Improvements in or relating to bellows-type contact construction
DEC27821A DE1204297B (de) 1962-05-25 1962-08-31 Steckeraufnahmekontakt fuer Schaltkarten
FR909776A FR1335302A (fr) 1962-05-25 1962-09-18 Perfectionnement aux contacts du type accordéon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US197743A US3120988A (en) 1962-05-25 1962-05-25 Bellows-type contact construction

Publications (1)

Publication Number Publication Date
US3120988A true US3120988A (en) 1964-02-11

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ID=22730587

Family Applications (1)

Application Number Title Priority Date Filing Date
US197743A Expired - Lifetime US3120988A (en) 1962-05-25 1962-05-25 Bellows-type contact construction

Country Status (6)

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US (1) US3120988A (it)
BE (1) BE622783A (it)
DE (1) DE1204297B (it)
FR (1) FR1335302A (it)
GB (1) GB945732A (it)
NL (1) NL284033A (it)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397381A (en) * 1965-07-05 1968-08-13 Amp Inc Printed circuit edge connector
US3479637A (en) * 1965-09-23 1969-11-18 Amp Inc Printed circuit connector
US3568134A (en) * 1969-03-03 1971-03-02 Itt Packaging and actuating system for printed circuit boards and electrical connector assemblies
US4354729A (en) * 1980-12-22 1982-10-19 Amp Incorporated Preloaded electrical contact terminal
US4370017A (en) * 1980-11-20 1983-01-25 Amp Incorporated Complanate contact terminal
US5626500A (en) * 1994-05-30 1997-05-06 The Whitaker Corporation Contact and connector
DE19923705B4 (de) * 1999-05-22 2012-08-23 Volkswagen Ag Elektrische Steckverbindung
CN103403973A (zh) * 2011-05-09 2013-11-20 株式会社自动网络技术研究所 连接器端子及包含该连接器端子的卡缘型连接器
US20200112118A1 (en) * 2018-10-09 2020-04-09 Japan Aviation Electronics Industry, Limited Connector
US20220013965A1 (en) * 2020-07-10 2022-01-13 TE Connectivity Services Gmbh Connector housing having terminal retention recess with stop surface

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4068915A (en) * 1975-09-22 1978-01-17 E. I. Du Pont De Nemours And Company Electrical connector
GB1540360A (en) * 1977-01-24 1979-02-14 Amp Inc Printed circuit board edge connector

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875425A (en) * 1955-09-08 1959-02-24 Continental Connector Corp Multiple electrical connector
US2908775A (en) * 1956-08-02 1959-10-13 Continental Connector Corp Combined connector and relay
US2983896A (en) * 1958-09-10 1961-05-09 Continental Connector Corp Multiple electrical connector with selectively positionable polarizing member
US3016508A (en) * 1960-10-24 1962-01-09 Prec Connectors Inc Printed circuit electrical connectors
US3069652A (en) * 1959-03-23 1962-12-18 Burndy Corp Electrical connector for printed circuit boards

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE25679E (en) * 1955-02-14 1964-11-10 System for analysing the spatial distribution of a function
US3034021A (en) * 1959-05-04 1962-05-08 Automation Ind Inc Magnetic testing system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2875425A (en) * 1955-09-08 1959-02-24 Continental Connector Corp Multiple electrical connector
US2908775A (en) * 1956-08-02 1959-10-13 Continental Connector Corp Combined connector and relay
US2983896A (en) * 1958-09-10 1961-05-09 Continental Connector Corp Multiple electrical connector with selectively positionable polarizing member
US3069652A (en) * 1959-03-23 1962-12-18 Burndy Corp Electrical connector for printed circuit boards
US3016508A (en) * 1960-10-24 1962-01-09 Prec Connectors Inc Printed circuit electrical connectors

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397381A (en) * 1965-07-05 1968-08-13 Amp Inc Printed circuit edge connector
US3479637A (en) * 1965-09-23 1969-11-18 Amp Inc Printed circuit connector
US3568134A (en) * 1969-03-03 1971-03-02 Itt Packaging and actuating system for printed circuit boards and electrical connector assemblies
US4370017A (en) * 1980-11-20 1983-01-25 Amp Incorporated Complanate contact terminal
US4354729A (en) * 1980-12-22 1982-10-19 Amp Incorporated Preloaded electrical contact terminal
US5626500A (en) * 1994-05-30 1997-05-06 The Whitaker Corporation Contact and connector
DE19923705B4 (de) * 1999-05-22 2012-08-23 Volkswagen Ag Elektrische Steckverbindung
CN103403973A (zh) * 2011-05-09 2013-11-20 株式会社自动网络技术研究所 连接器端子及包含该连接器端子的卡缘型连接器
US20130323955A1 (en) * 2011-05-09 2013-12-05 Autonetworks Technologies, Ltd. Connector terminal and card edge type connector including this connector terminal
US20200112118A1 (en) * 2018-10-09 2020-04-09 Japan Aviation Electronics Industry, Limited Connector
US10797422B2 (en) * 2018-10-09 2020-10-06 Japan Aviation Electronics Industry, Limited Connector
US20220013965A1 (en) * 2020-07-10 2022-01-13 TE Connectivity Services Gmbh Connector housing having terminal retention recess with stop surface
US11322899B2 (en) * 2020-07-10 2022-05-03 TE Connectivity Services Gmbh Connector housing having terminal retention recess with stop surface

Also Published As

Publication number Publication date
FR1335302A (fr) 1963-08-16
DE1204297B (de) 1965-11-04
BE622783A (it)
GB945732A (en) 1964-01-08
NL284033A (it)

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