US3706960A - Fork-shaped one-piece electrical spring contacts - Google Patents

Fork-shaped one-piece electrical spring contacts Download PDF

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Publication number
US3706960A
US3706960A US128840A US3706960DA US3706960A US 3706960 A US3706960 A US 3706960A US 128840 A US128840 A US 128840A US 3706960D A US3706960D A US 3706960DA US 3706960 A US3706960 A US 3706960A
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US
United States
Prior art keywords
contact
tongue
fingers
axis
respect
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
US128840A
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English (en)
Inventor
Hans August Herbert Grenda
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.)
W Holzer and Co KG
Original Assignee
W Holzer and Co KG
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 W Holzer and Co KG filed Critical W Holzer and Co KG
Application granted granted Critical
Publication of US3706960A publication Critical patent/US3706960A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • 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
    • H01R12/722—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures coupling devices mounted on the edge of the printed circuits
    • H01R12/728—Coupling devices without an insulating housing provided on the edge of the PCB
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H2001/5883—Electric connections to or between contacts; Terminals the extension of the contact being crimped around a wire

Definitions

  • the innovation relates to a fork-shaped contact spring, especially for printed circuit boards, to squeeze against the electric conductors and with contact fingers made of double the material thickness, which develops by folding an essentially symmetrical punched part.
  • Fork-shaped contact springs whose thickness of material develops by folding essentially symmetrical punched parts have been known.
  • a contact spring strip is proposed, in which the individual contact springs are produced in one piece from a single metal element, especially a punched element, representing the two contact elements each time in a homologous arrangement, which strip is folded along the plane of symmetry reflecting the contact elements.
  • One drawback of the individual contact springs of the spring strip is that the two resilient arms producing the contact giving spring pressure consist in each instance of two individual elements.
  • Other contact springs have already become known which are made from only a single punched element.
  • the object of the invention to create a forkshaped contact spring which is suitable for use in contact housings, for example contact strips, which can be made easily and with the least possible production waste and which, beyond that, has great stability; in addition, the contact springis to be in a position to conduct considerable currents as switched, forexample, in electric household appliances. Furthermore, the contact spring is to be built in such a way that-used as an individual spring-it will sit securely on a printed circuit board and will not be able to twist. it should be possible to attach, electrically as well as mechanically, cables to the contact spring with the aid of a simple squeeze connection. According to the innovation, the
  • two contact parts which are independent per se and which are part of the symmetrical punched element, are held together in their folded state by a tongue.
  • the tongue simultaneously serves to arrest the contact spring in a housing, for example, in a plug socket.
  • An effective feature of the invention is that, the tongue will be prevented from bending back by means of shoulders which have been attached to one of the contact elements.
  • Yet another feature of the invention provides that the attaching flange for the cable is attached in the plugging direction.
  • the attaching flange is at an angle with respect to the plugging direction.
  • the invention has several advantages.
  • an advantage of the invention is that the tongue serving to hold together the two parts serves atthe same time as a stop for the contact spring in a contact housing.
  • FIG. 1 shows a top view of the punched part
  • FIG. 2 shows a top view of the punched part during punching from a band-shaped starting material
  • FIG. 3 shows a perspective view of a completed forkshaped contact'spring.
  • a punched part is used-if flange 6 is disregarded-consisting essentially of two independent contact springs 10, 11, which together form an almost symmetrical punched element.
  • One contact element in this case has been provided additionally with tongue 8 and the other contact element with projections 9.
  • both contact parts are folded at a bending line 5 into a single contact spring.
  • the second contact element 10' could also be attached in such a way to the first contact element 1 1 that it can be placed on top of contact element 11 along a bending line 5.
  • tongue 8 is bent over in such a way that it will hold contact element 10 on contact element 11, so that it can no longer return.
  • projections 9 can be provided on the second contact element 10, between which a space will remain free which is smaller than the width of tongue 8. Therefore, as soon as tongue 8 holds the contact element 10 on contact element 11, the projections 9 can again be bent in the direction toward the plane formed by theflat material until the projections abut against tongue 8. From that time on,
  • tongue 8 (FIG. 3) is bent out from the plane determined by the flat material and, as a result of that, it serves to stop a contact spring inserted into a contact housing, for example, a spring-contact strip. Consequently, the contact spring will be prevented from falling out of the contact housing.
  • the flange 6 (FIG. 1), which has been attached essentially symmetrically to the punched element, serves in a manner known per se for an electrical or mechanical attachment of cables. As can be seen from FIG. 2, the flange 6 can be attached just as well in the pluggingin direction to the symmetrical punched element. Naturally, in the case of all embodiments, flange 6 is a component of the punched element. In FIG. 2 it has been shown moreover how the punched-elements can be punched out from a flat starting material 7. Naturally, it will also be possible that the punched elements shown in FIG. 2 assume a position on the band-shaped starting material which is twisted by about 90.
  • first and second contact elements for folding in overlapping relationship with one another about a first axis between said first and second contact elements;
  • said first contact element including first and second contact fingers symmetrically disposed with respect to a second axis extending between said first and second contact fingers for folding into a plane substantially normal .to the plane of said sheet material;
  • said second contact element including third and fourth contact fingers symmetrically disposed with respect to a third axis extending between said third and fourth fingers for folding into a plane substantially normal to the plane of said sheet material, a tongue extending between said third and fourth contact fingers for holding said first and second contact elements in closely abutting overlapping relationship;
  • said first and third contact fingers and said second and fourth contact fingers are respectively symmetrically positioned with respect to said first axis;
  • a flange element for forming a connector to receive an electrical conductor.
  • first contact element further includes first and second projec-. tions symmetrically formed with respect to said second axis and the respective free ends thereof are spaced a distance less than the width of said tongue to form an aperture for retaining said tongue.
  • said first contact element further includes first and second projections symmetrically formed with respect to said second axis and the respective free ends thereof are spaced a distance less than the width of said tongue to form an a erture for retainin said ton ue.
  • a one-piece ele ctrical c ntact of the fork-shaped contact type comprising:
  • first and second contact elements folded in overlapping relationship with one another about a first axis between said first and second contact elements
  • said first contact element including first and second planar contact fingers symmetrically disposed with respect to a second axis extending between said first and second contact fingers, the respective surfaces of said first and second contact fingers extend substantially normal to the plane'of said first and second contact elements;
  • said second contact element including planar third and fourth contact fingers symmetrically disposed with respect to said second axis, the surfaces of said third and fourth contact fingers extend substantially substantially normal to the plane of said first and second contact elements, whereby said first and second and said third and fourth contact fingers are respectively aligned to form opposing arms of said fork-shaped contact, a tongue extending between said opposing arms and overlapping said first contact element for holding said first and second contact elements in said overlapping relationship;
  • a flange element formed into a connector to receive an electrical conductor.
  • first connector element further includes first and second projections symmetrically formed with respect to said second axis and the respective free ends thereof are spaced a distance less than the width of said tongue to form an aperture for retaining said tongue.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
US128840A 1970-03-28 1971-03-29 Fork-shaped one-piece electrical spring contacts Expired - Lifetime US3706960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7011611U DE7011611U (de) 1970-03-28 1970-03-28 Gabelfoermige kontaktfeder.

Publications (1)

Publication Number Publication Date
US3706960A true US3706960A (en) 1972-12-19

Family

ID=6610549

Family Applications (1)

Application Number Title Priority Date Filing Date
US128840A Expired - Lifetime US3706960A (en) 1970-03-28 1971-03-29 Fork-shaped one-piece electrical spring contacts

Country Status (4)

Country Link
US (1) US3706960A (en, 2012)
DE (1) DE7011611U (en, 2012)
FR (1) FR2085141A5 (en, 2012)
GB (1) GB1297326A (en, 2012)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874769A (en) * 1972-04-04 1975-04-01 Hans Simon Spring contact for establishing electric plug-in connections
US3950071A (en) * 1974-11-11 1976-04-13 General Electric Company Multiple stab electrical connector
US3973919A (en) * 1972-04-04 1976-08-10 Hans Simon Strip for springy contacts
DE2517069A1 (de) * 1975-04-17 1976-10-28 Grote & Hartmann Universal-gabelfeder sowie winkeldirektstecker fuer die universal- gabelfeder
EP0013308A1 (de) * 1979-01-05 1980-07-23 Grote & Hartmann GmbH & Co. KG Doppelflachfeder
US4722701A (en) * 1986-09-29 1988-02-02 Todd Engineering Sales, Inc. Fuse block for miniature plug-in blade-type fuse
US6491553B2 (en) * 2000-12-20 2002-12-10 Berg Technology, Inc. Electrical connector having an electrical contact with a formed solder cup
DE102008036128B3 (de) * 2008-08-01 2009-10-15 Hans Simon Steckverbinder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104925A (en) * 1962-01-16 1963-09-24 Nat Connector Corp Electrical connector assembly
FR1392205A (fr) * 1964-04-22 1965-03-12 Contact électrique à fourche
US3262088A (en) * 1964-05-19 1966-07-19 Cambridge Thermionic Corp Connector and jack therefor
FR89710E (en, 2012) * 1963-02-04 1967-08-04

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104925A (en) * 1962-01-16 1963-09-24 Nat Connector Corp Electrical connector assembly
FR89710E (en, 2012) * 1963-02-04 1967-08-04
FR1392205A (fr) * 1964-04-22 1965-03-12 Contact électrique à fourche
US3262088A (en) * 1964-05-19 1966-07-19 Cambridge Thermionic Corp Connector and jack therefor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Kent Catalog No. 121206, 1958 02, 339 276F *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874769A (en) * 1972-04-04 1975-04-01 Hans Simon Spring contact for establishing electric plug-in connections
US3973919A (en) * 1972-04-04 1976-08-10 Hans Simon Strip for springy contacts
US3950071A (en) * 1974-11-11 1976-04-13 General Electric Company Multiple stab electrical connector
DE2517069A1 (de) * 1975-04-17 1976-10-28 Grote & Hartmann Universal-gabelfeder sowie winkeldirektstecker fuer die universal- gabelfeder
EP0013308A1 (de) * 1979-01-05 1980-07-23 Grote & Hartmann GmbH & Co. KG Doppelflachfeder
US4722701A (en) * 1986-09-29 1988-02-02 Todd Engineering Sales, Inc. Fuse block for miniature plug-in blade-type fuse
US6491553B2 (en) * 2000-12-20 2002-12-10 Berg Technology, Inc. Electrical connector having an electrical contact with a formed solder cup
DE102008036128B3 (de) * 2008-08-01 2009-10-15 Hans Simon Steckverbinder
EP2149935A2 (de) 2008-08-01 2010-02-03 Hans Simon Steckverbinder
US20100029116A1 (en) * 2008-08-01 2010-02-04 Hans Simon Connector Assembly

Also Published As

Publication number Publication date
DE7011611U (de) 1971-01-21
GB1297326A (en, 2012) 1972-11-22
FR2085141A5 (en, 2012) 1971-12-17

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