US3333226A - Torsion bar electrical connector - Google Patents

Torsion bar electrical connector Download PDF

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Publication number
US3333226A
US3333226A US392086A US39208664A US3333226A US 3333226 A US3333226 A US 3333226A US 392086 A US392086 A US 392086A US 39208664 A US39208664 A US 39208664A US 3333226 A US3333226 A US 3333226A
Authority
US
United States
Prior art keywords
contact
arms
body portion
circuitry
connector
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
US392086A
Other languages
English (en)
Inventor
Raymond C Donnelly
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US392086A priority Critical patent/US3333226A/en
Priority to AT761865A priority patent/AT278949B/de
Application granted granted Critical
Publication of US3333226A publication Critical patent/US3333226A/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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
    • 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
    • H01R12/50—Fixed connections
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/55—Fixed connections for rigid printed circuits or like structures characterised by the terminals
    • H01R12/58—Fixed connections for rigid printed circuits or like structures characterised by the terminals terminals for insertion into holes

Definitions

  • the contact members are of resilient spring stock that uses the inherent resilience to effect contact pressure.
  • the frame is used as a fulcrum and, therefore, must necessarily be bulky which more or less precludes their use in microminiature applications.
  • Another object is to provide a connector the contacts of which are formed of wire of materials having good tension characteristics.
  • a further object is to provide a connector in which the wire contacts provide point-line contact.
  • a still further object is to provide a connector adaptable for use in micro-miniature installations.
  • a sub-miniature connector for modules and printed circuits wherein the conductive contact when in operative position is under torsion rather than tension or compression. They are so formed that the body portion is held rigid while the free ends thereof place all or portions of the body portion in torsion when engaged by a module pin or connector.
  • the contacts are formed of simple preformed shapes of rigid metallic wire preferably round in cross section and preclad or coated with gold or other highly conductive metal. The round configuration insures line point contact, that is unlikely to be scratched, galled or otherwise damaged even after countless contact operations.
  • FIG. 1 is a plan view of a portion of a circuit board with the preferred form of the invention shown in operated and unoperated condition.
  • FIG. 2 is a front elevation of FIG. 1 showing the method of fastening the contact.
  • FIG. 3 is an isometric showing the contact member of FIG. 1.
  • FIG. 4 shows a modification of the connector shown in FIG. 1.
  • FIG. 5 is a plan view showing a further modified form of the invention.
  • FIG. 6 is a cross-section taken along line 6-6 of FIG. 5 showing the connector in normal position.
  • FIG. 7 is a cross-section similar to FIG. 6 showing the invention in operated condition.
  • FIG. 8 is an isometric showing of the modified form of FIG. 5.
  • FIG. 9 is a plan view of a still further modified form of the invention.
  • FIG. 10 is an isometric of the contact member of FIG. 9.
  • This connector is for use principally with micro modules and printed circuits where tolerances are close.
  • the contacts as disclosed are of fine wires.
  • each contact does not rely on the resilience of its members to effect good contact pressure, but uses torsion built up in one member by the leverage exerted by a second member. It may be well to point out that each contact comprises a unitary structure composed of members one or more of which are placed in torsion by the movement of the free end members of the structure.
  • holes 10 and 11 are formed in a printed circuit board 12 having the circuitry 14 on the reverse side.
  • the circuits on the board are to be connected by pins 15' to another circuit, module or component.
  • the contact 16 is formed of a U-shaped body member 17 and two arms 18 (FIG. 3).
  • the -U-shaped body 17 is inserted in hole 10 with the arms 18 resting on the surface of the circuit board (FIG. 2).
  • the hole 10 having been cut through a land or portion of circuitry 14 at the base of the U-shaped body, may be soldered or welded to that circuitry as at 20.
  • the arms of the body 17 are twisted about their longitudinal axis thus building up torsion which holds the arms in resilient and constant contact with the pin.
  • the contact is formed of stiff wire such as steel, Phosphor bronze, and the like, the arms 18 or the entire structure being gold-plated to effect low contact resistance.
  • the contact 25 shown in FIG. 4 is similar to that of FIG. 1 with the exception that the arms 26 are formed with shoulders 27 permitting the pin 30 to be used in edge-connecting two circuits or a module.
  • the shoulders act to lock the pin from being easily dislodged.
  • the contact 35 is similar to contacts 16 and 25, except that arms 36 are provided with depending arms 37 extending into a hole 11'. This form provides a Wiping line contact between pin 40 and arms 37 upon insertion.
  • the contact 45 in FIG. 9 operates on the same principle as those above.
  • the U-shaped body portion 46 is molded in a block 47 of plastic or the like and has a contact wire 48 soldered thereon that extends out of the casing.
  • the arms 50 extend parallel to each other and free of the block. When an arm 51 of rotary switch member 52 moves between the arms 50, the arms of body portion 46 are placed in torsion, thereby insuring firm, even contact pressure.
  • a contact comprising a U-shaped body portion having arms bent at right angles to said body in parallel relation with each other;
  • said arms being bent to form centrally located shoulders
  • said body portion being housed in said aperture with the base thereof connected to said circuitry;
  • said body portion being housed in one of said apertures with the base thereof connected to said circuitry;
  • said free ends extending over said circuit board with the converging ends extending into the second of said apertures, said free ends being movable between an inoperative position and an operative position wherein portions of said body portion within said aperture are torsionally stressed;

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
US392086A 1964-08-26 1964-08-26 Torsion bar electrical connector Expired - Lifetime US3333226A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US392086A US3333226A (en) 1964-08-26 1964-08-26 Torsion bar electrical connector
AT761865A AT278949B (de) 1964-08-26 1965-08-18 Lösbare Kontaktsteckverbindung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US392086A US3333226A (en) 1964-08-26 1964-08-26 Torsion bar electrical connector

Publications (1)

Publication Number Publication Date
US3333226A true US3333226A (en) 1967-07-25

Family

ID=23549198

Family Applications (1)

Application Number Title Priority Date Filing Date
US392086A Expired - Lifetime US3333226A (en) 1964-08-26 1964-08-26 Torsion bar electrical connector

Country Status (2)

Country Link
US (1) US3333226A (de)
AT (1) AT278949B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273455A (en) * 1993-01-27 1993-12-28 Digital Equipment Corporation Torsion bar connector
US20060035482A1 (en) * 2004-05-06 2006-02-16 Gary Yasumura Torsionally-induced contact-force conductors for electrical connector systems
US20110171859A1 (en) * 2010-01-08 2011-07-14 Fjelstad Joseph C Connector Constructions for Electronic Applications
USD742669S1 (en) * 2013-10-16 2015-11-10 Wen-Tsung Chang Shelving frame
USD880600S1 (en) * 2018-03-23 2020-04-07 Simformotion Llc Simulator frame

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1735133A (en) * 1923-11-27 1929-11-12 Drahtlose Telegraphie Gmbh Support for thermionic tubes
US2535578A (en) * 1945-08-09 1950-12-26 Cinch Mfg Corp Radio tube socket
US3188599A (en) * 1962-11-02 1965-06-08 Amp Inc Electrical connector for printed circuit board
US3230297A (en) * 1962-09-05 1966-01-18 Bell Telephone Labor Inc Circuit board through connector with solder resistant portions
US3246280A (en) * 1965-03-09 1966-04-12 Bell Telephone Labor Inc Microcircuit connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1735133A (en) * 1923-11-27 1929-11-12 Drahtlose Telegraphie Gmbh Support for thermionic tubes
US2535578A (en) * 1945-08-09 1950-12-26 Cinch Mfg Corp Radio tube socket
US3230297A (en) * 1962-09-05 1966-01-18 Bell Telephone Labor Inc Circuit board through connector with solder resistant portions
US3188599A (en) * 1962-11-02 1965-06-08 Amp Inc Electrical connector for printed circuit board
US3246280A (en) * 1965-03-09 1966-04-12 Bell Telephone Labor Inc Microcircuit connector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273455A (en) * 1993-01-27 1993-12-28 Digital Equipment Corporation Torsion bar connector
US20060035482A1 (en) * 2004-05-06 2006-02-16 Gary Yasumura Torsionally-induced contact-force conductors for electrical connector systems
US7845986B2 (en) 2004-05-06 2010-12-07 Interconnect Portfolio Llc Torsionally-induced contact-force conductors for electrical connector systems
US20110171859A1 (en) * 2010-01-08 2011-07-14 Fjelstad Joseph C Connector Constructions for Electronic Applications
US8246387B2 (en) 2010-01-08 2012-08-21 Interconnect Portfolio Llc Connector constructions for electronic applications
US8333617B2 (en) 2010-01-08 2012-12-18 Interconnect Portfolio Llc Connector constructions for electronic applications
USD742669S1 (en) * 2013-10-16 2015-11-10 Wen-Tsung Chang Shelving frame
USD880600S1 (en) * 2018-03-23 2020-04-07 Simformotion Llc Simulator frame

Also Published As

Publication number Publication date
AT278949B (de) 1970-02-25

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