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Publication numberUS3274534 A
Publication typeGrant
Publication dateSep 20, 1966
Filing dateDec 2, 1963
Priority dateDec 2, 1963
Publication numberUS 3274534 A, US 3274534A, US-A-3274534, US3274534 A, US3274534A
InventorsShortridge William K
Original AssigneeGen Dynamics Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electrical connector
US 3274534 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

sePt- 20, 1966 w. K. SHORTRIDGE 3,274,534

ELECTRICAL CONNECTOR Filed Dec. 2, 1963 United States Patent O 3,274,534 ELECTRICAL CONNECTOR William K. Shortridge, Anaheim, Calif., assignor to General Dynamics Corporation, Pomona, Calif., a corporation of Delaware Filed Dee. 2, 1963, Ser. No. 327,457 15 Claims. (Cl. 339-196) This invention relates in general to electrical connectors and more particularly to an electrical connector particularly Well adapted for use in circuit checkout of electronic modules.

The welded module concept which has evolved in electronic packaging design has created a need for a connector which will accurately make contact with module terminals for checkout purposes without damaging the leads. Such a connector must be capable -of making simultaneous contact with a plurality of m-odule terminals or leads which often vary in extent of protrusion from the module -face and are closely spaced. Further, the connector must effect such contact notwithstanding the initial existence of oxidation or foreign particles upon the terminals or contacts.

Accordingly it is an object of th-is invention to provide a connector which meets the above requirements and which is, as well, of rugged and simple design and is low in cost of manufacture.

The connecto-r of this invention employs for connection with the terminals of `a unit, for example a module, a plurality of biased independently movable contact pins lspace-d longitudinally of the connector housing and arranged for movement in extension and retraction transverse of the housing at an angle to its vertical transverse axis or centerline. Certain of the pins are inclined t-o one side of the connector housing vertical transverse ax-is and others to the opposite side thus tending toward and away from convergence with pin extension and retraction into the connector housing. This angular :disposition or canting of the pins causes a wiping co-ntact with terminals of a module jluxtapositioned for test, assuring removal of surface oxides and foreign particles and elimination of impedance and noise signals during circuit testing. The pins are independently movable and individually biased to protrude, when extended, from the lower surface of `the connector housing to make terminal contact. Thus, the pins are adapted to accommodate differences in surface protrusion of the various terminals and variations in the orientation of the checkout connector with the face of the mo-dule undergoing test. The connector construction further permits close spacing of adjacent pins and simultaneous contact with correspondingly positioned module terminals which latter, with miniaturization ytechniques, are often closely spaced.

In addition to the foregoing, other objects and advantages of the invention will become apparent from the following description when taken in conjunction with the drawing, in which:

FIG. l is an 'isometric view of two connectors posi- 'tioned for module checkout, with one connector partially broken away to disclose interior details;

FIG. 2 is a view of a connector in. side elevation;

FIG. 3 is a view in section taken on the line 3 3 of FIG. 2; and

FIG. 4 is a bottom view of a connector.

"ice

In FIG. 1 there are shown in testing position atop an encapsulate-d module 6 of rectilinear shape a pair of the connectors of this invention, each generally designated by the numeral 8. Protruding from the module upper surface 10 are two rows of spaced terminals or leads 12 in circuit with -module components (not shown) to be tested. Connectors 8 are each shown -aligned ywith the rows of terminals 12. Connector contact with these terminals is made through independently movable, angularly disposed or inclined contact pins 14. These pins when extended protrude from the lower surface 16 of the connector [housing 18. The lower portion 20 of the connector housing 18 of each of the connectors is tapered to `facilitate alignment of the connector with the terminals of the unit, such as module 6, undergoing test. Extending upwardly from the connector housing upper surface 22 are a plurality of output terminals 24 which `are in circuit with the contact pins 14 through internal leads 26.

As shown in greater det-ail in FIGS. 2 and 3, the connecto-r 8 of this invention functions through a plurality of similarly constructed circuit port-ions or channels which are spa-ced longitudinally of the connector housing 18 and which lare respectively comprised of a contact pin 14 individually biased for independent movement and terminal contact, an internal lead 26 electrically connected at one end to the pin 14, `and an output terminal 24 to which the other end of the lead is electrically connected. Output termin-als 24 may take various forms. Thus although shown 'in FIGS. 1, 2 and 3 to make use of solder pin portions, there may as well be employed other output arrangements, as for example, plug outputs.

The housing 18 'which may conveniently be fabricated of high tensile strength molded plastic is comprised of an upper portion 28, a central hollow portion 30, and a pin receiving and Iguiding lower portion or block 20. A rectangular recess 34 is provided in upper portion 28 for receipt of block 36 wherein are received output terminals 24. Interposed between housing upper portion 28 and central portion 30 is a sheet 38, preferably of Mylar. The central portion 30 is provided with a plurality of individual angularly shaped cavities 40 for reception and accommodation of elbows 42 formed in the internal leads 26. Also provided for reception off helical spring biasing means 44 are inclined cavities 46 of cylindrical shape closed at their upper ends and open at their lower ends. Completing the housing assembly is block member 20 which is provided with inclined bores 48 and inclined slots 50 extending outwardly from the bore upper ends. Bores 48 are positioned in alignment with cavities 46 for close tting slidable receipt of pins 14.

It Will be noted that bores 48 and slots S0 are disposed in angular relation with the vertical transverse axis of the housing 18 with adjacent such bores and slots being oppositely inclined with respect to the housing vertical transverse axis. The bores and slots yare preferably so disposed that the pin nose portion or lower extremity 52 traverses the vertical transverse axis or centerline of the housing midway in its allowable travel.

FIG. 3 provides a solid line showing of a typical channel with elongated cylindrical contact pin 14 guidably received within bore 48 `and aligned cavity 46 for movement therethrough from a retracted position within the housing to the extended position illustrated in FIG. 3. Compression spring biasing means 44 bears upon the upaar-1,5 s4

per end of pin 14 to urge it into the extended position illustrated, with its nose portion 52 protruding a substantial distance beyond the housing lower surface 16. A detent 54 of rectangular shape which may be integral with pin 14 is guidably received for movement within slot S0 and serves to limit the downward travel of the pin in extension and to prevent pin rotation during such movement. Pin 14 may be made from a variety of suitable materials, however, beryllium copper alloy has been found particularly satisfactory. The pin is provided with a spherically shaped nose portion 52 to assure contact with the terminals 12 of the module 6 undergoing test. Internal lead 26, suitably of spring quality beryllium copper sheet is formed with an elbow 42 Ito permit its exure in order to accommodate movement of the pin 14 as same extends and retracts. The lead is preferably resistance welded to detent 54. Both may then be goldplated and given a rhodium ash finish. Lead 26 is suitably welded in a similar fashion at its upper end t the output terminal 24.

From the above description it will be observed that the connector when brought into proximity with the module 6 undergoing ytest engages the terminals 12 thereof through the protruding rounded or spherical nose portions 52 of its pins 14. Initial contact is made with the pins fully extended, as in FIGURE 3. The connector is then pressed against the module terminals so as to cause retraction of the pins against the biasing forces of compression springs 44 to points approximately midway of the total travel allowed the pins. In so doing the pins are caused to wipe over the surfaces of the terminals 12 cleaning them of oxides and foreign matter and assuring good contact. As the pins retract into the housing block member 20, springs 44 are compressed to increase the biasing force upon the pins and assure contact with the terminals 12. Since such pins are independent in their movement and bias, irregularities in the height of projection of the module terminals 12 above lthe surface 10 of the module are readily accommodated and electrical contact is maintained at all terminals.

From the foregoing, it may be seen that this invention provides a connector well suited to effecting contact with units undergoing test, particularly encapsulated modules lhaving surface disposed, closely spaced terminals. Although the invention has been described with respect to a preferred embodiment, it is to be understood that it may be altered, changed or modified within the scope and spirit of the appended claims.

What I claim is:

1. An electrical connector comprising, in combination:

(a) a housing having an upper surface and a lower surface;

(b) output terminals positioned at said housing upper surface;

(c) contact pins spaced longitudinally of the housing and receivable therein for independent movement angular to the housing vertical axis to and from retracted positions within said housing and extended positions of protrusion from said housing lower surface;

(d) contact leads extending between each of said output terminals and respective associated contact pins; and

(e) biasing means urging said pins independently into said positions of protrusion beyond the housing lower surface and permitting said pins retraction into said housing, such that the pins Wipingly engage circuit terminals positioned thereagainst t-o force said pins into retracting movement.

2. A11 electrical connector comprising, in combination:

(a) a housing having an upper surface and a lower surface;

(b) output terminals positioned at said housing upper surface;

(c) contact pins spaced longitudinally of the housing having terminal-engaging lower nose portions and receivable within said housing for movement at an inclination to vthe housing vertical axis from positions -of retraction within said housing to positions of extension and nose portion protrusion from said housing lower surface, said nose portions in said movement traversing the yhousing vertical axis;

(d) contact leads extending between each of said output terminals and respective associated contact pins; and

(e) biasing means urging said pins independently into said positions of extension and nose portion protrusion beyond the housing lower surface and permitting said pins retraction into said housing, such that the pins'wipingly engage circuit terminals positioned against the pin nose portions to force said pins into retracting movement.

3. An electrical connector comprising, in combination:

l(a) .a housing having |an upper surface and a lower surface;

(!b) output terminals positioned at said housing upper surface;

(c) contact pins spaced longitudinal-ly of the housing having terminal-engaging lower nose portions and received within 4the housing for independent movement from positions of retraction Within said housing to positions of extension Iand nose portion protrusion from said housing lower surface, said pin Imovement being angularly directed with respect to .the housing vertical axis, adjacent pins being oppositely angled with respect to said axis for direction toward each other and line convergence near said housing lower surface during said movement;

(d) contact leads extending between each of said output terminals and respective associated contact pins; and

(e) biasing means urging said pins independently into said positions of extension and nose portion protrusion beyond the housing lower surface and permit- :ting said p-ins retraction into said housing, such that the pins wipingly engage circuit terminals positioned against the pin nose portions lto force said pins into retracting movement.

4. An electric-al connector comprising, in combination:

(a) a housing having an upper surface and a lower surface and a plurality of cavities spaced longitudinally of the housing communicating with the housing lower surface, said cavities being inclined with respect t-o the housing vertical axis with adjacent cavities being -oppositely inclined for upward divergence;

(b) output terminals positioned at said housing upper surface;

(c) contact pins having terminal-engaging nose portions receivable in closely spaced relation within said cavities for guidance thereby in independent movement from positions of retraction within said cavities t-o positions of extension and nose portion protrusion from said housing lower surface;

(d) contact leads extending between each of said outputi terminals and respective associated contact pins; an

(e) lbiasing means urging said .pins independently into said positions of extension and nose portion protrusion beyond the housing lower surface and permitting said pins retraction into said housing, such that the pins wipingly engage circuit terminals positioned against the pin nose portions t-o force said pins into retracting movement.

5. An electrical connector comprising, in combination:

(a) a housing having a tapered lower end portion and an upper surf-ace and a lower surface and a plurality of 'cavities spaced longitudinally of the housing communicating with the housing lower surface, said cavities being inclined with respect to .the housing vertical axis with adjacent cavities being oppositely inclined for upward divergence;

(b) output terminals positioned at said housing upper surface;

(c) contact pins having .terminal engaging nose portions receivable in closely spaced relation with said cavities for guidance thereby in independent movemen-t from positions of retraction within said housing to positions of extension and nose portion protrusion from said yhousing lower surface;

(d) contact leads extending between each of said output terminals and respective associated contact pins `adapted for flex-ure with said pin movement; and

(e) biasing means urging said pins independently into said positions of protrusion Ibeyond the housing lower surface and permitting said pins retraction into said housing, such that the lpins wipingly engage circuit terminals positioned against the pin nose portions .to Iforce said pins i-nto retracting movement.

6. An electrical connector comprising, in combination:

(a) a housing having an upper surface and a lower surface, said lower surface being of a different dimension than said upper surface;

(b) -output terminals positioned in said housing upper surface;

(c) contact pins spaced longitudinally of said housing and positioned therein for independent extension and retract-ion with respect t-o said housing lower surface; said pins having a longitudinal axis at an acute angle with respect to a vertical axis of the housing;

(d) Icontact leads extending between each of said contact pins and a respective associated output terminal; and

(e) biasing means positioned in said housing and normally urging said pins independently linto an extended position thereby protruding beyond said h-ousing lower surface Awhile permitting retraction into said housing, such that said pins wipingly engage circuit terminals positioned the-reaga-inst to force said pins into said housing.

7. An electrical c-onnector comprising, in combination:

(a) a housing having a longitudinal axis, a transverse axis perpendicular to said longitudinal axis, and a vertical axis perpendicular to said longitudinal and said transverse axis, said housing having upper and lower surfaces, said upper surface being of a greater dimension than said lower surface;

(b) output terminals positioned in said upper surface;

(c) contact pins spaced longitudinally of said housing and receivable therein, each having a longitudinal axis defining an acute angle with respect t-o the vertical axis of said housing, and adapted for independent movement angul'ar to the transverse axis of said housing to and from retracted positions within said housing and extended positions of protrusion from said housing lower surface;

(d) contact leads extending between each of sai-d output terminals and respective associated contact pins; and

(e) biasing means urging said pins independently into .said positions of protrusion beyond said housing lower surface yand permitt-ing said pins retraction into said housing, such that said pins wipingly engage circuit terminals positioned thereagainst to force said pins into retracting movement.

8. An electrical connector comprising, in combination:

(a) `a housing having a transverse axis, and including an upper surface and a lower surface, said axis intersecting said lower surface at a predetermined point;

(b) terminal means operatively connected to said upper surface;

(c) contact means independently receivable within said housing and at least partially protruding from .said lower surface, each having a longitudinal axis extending at an angle to and intersecting with said point of intersection of said housing vertical axis and lower surface;

l(d) means for interconnecting each of said contact means with a respective terminal means; and

(e) means normally urging said contact means independently into said protruding position beyond the housing lower surface while permitting said contact Imeans to retract to within said housing, whereby said `contact means wipingly engage associated terminals positioned thereagainst during the retracting movement of said contact means into said housing.

9. An electrical connector comprising, in combination:

(a) a housing having an upper surface and a lower surface, the upper surface being of a greater dimension than the lower surface, and a vertical axis defining a point of intersection with a transverse taxis, t-he vertical and transverse axes being perpendicular with respect to one another;

(-b) output terminals positioned in said housing upper surface;

(c) contact pins spaced from one another longitudinal- `1y of said housing and receivable therein for independent movement angular to said intersection point of said housing transverse Iand vertical axes to and `from retracted positions within said housing and extended positions of protrusion from said housing lower surface;

(d) contact leads extending between each of said output terminals and respective associated contact pins; and

(e) biasing means urging said contact pins independently into said positions of protrusion beyond said housing lower surface and permitting said pins retraction into said housing, whereby said pins wipingly engage associated circuit terminals positioned thereagainst during the retracting movement of said pins.

10. In combination with a mod-ule having terminal members, an electrical connector comprising:

(a) -a housing having an upper surface and a lower surface;

(b) output terminals positioned in said housing upper surface;

(c) contact pins spaced longitudinally of said housing having lower nose portions adapted to contact said terminal members of said module and received within said housing for independent movement from positions of retraction within said housing to posi- .tions of extension producing protrusion of said nose portions from .said housing lower surface, said pin being positioned in said housing so that said nose portions of adjacent pins extend in a converging direction with respect to each other;

(d) contact leads extending between each of said output terminals and respective associated contact pins; 'and (e) biasing means urging said pins independently into said positions of extension and nose portion protrusion beyond said housing lower surface and permitting said pins retraction into said housing, such that said pins wipingly engage said module terminal members positioned against said pin nose portions to -force said pins into retracting movement.

11. The combination dedined in claim 10, wherein said module terminal members are provided with at upper surface portions.

12. The combination defined in claim 10, wherein said housing upper surface is of a tgreater dimension than said housing lower surface.

13. The combination defined in claim 10, wherein said contact leads are constructed of spring quality material to permit exure thereof duringmovement of said contact pins. Y

14. The electrical connector dened in claim 1, wherein said contact pins include spherically shaped nose portions.

15. The electrical connector defined in claim 14 wherein said housing upper and lower surfaces are of dierent dimensions.

References Cited by the Examiner UNITED STATES PATENTS 8 2,742,626 i 4/1956 Collins et al.' 339-176 2,814,7-90 11/1957 Stoll et al. 339-151 X FOREIGN PATENTS 1,290,163 3/1962 France.

OTHER REFERENCES IBM Technical Disclosure Bulletin, vol. 6, No. 4, September 1963, page 10.

BOlBrBY R. GAY, Primary Examiner.

PATRICK A. CLIFFORD, JOSEPH D. SEERS,

Examiners

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3534320 *Aug 10, 1966Oct 13, 1970Westinghouse Electric CorpElectrical connector
US3676776 *Jan 19, 1970Jul 11, 1972Siemens AgTesting probe construction
US3701021 *Nov 27, 1970Oct 24, 1972Signetics CorpApparatus for testing circuit packages
US3761808 *Jul 8, 1970Sep 25, 1973Aai CorpTesting arrangement
US3806801 *Dec 26, 1972Apr 23, 1974IbmProbe contactor having buckling beam probes
US6348789 *Jul 18, 1997Feb 19, 2002Ando Electric Co., Ltd.Testboard for IC tester
US6727715Sep 6, 2002Apr 27, 2004Micron Technology, Inc.Test system and test contactor for electronic modules having beam spring contacts
US6756802 *Nov 26, 2002Jun 29, 2004Micron Technology, Inc.Test system for electronic modules having contactors with spring segment terminal portions
US6888364Jan 9, 2004May 3, 2005Micron Technology, Inc.Test system and test contactor for electronic modules
US7123036Oct 11, 2004Oct 17, 2006Micron Technology, Inc.Test method for electronic modules
US7161369 *Oct 29, 2004Jan 9, 2007Agilent Technologies, Inc.Method and apparatus for a wobble fixture probe for probing test access point structures
US7279915Aug 24, 2005Oct 9, 2007Micron Technology, Inc.Test method for electronic modules using movable test contactors
US7479794 *Feb 28, 2007Jan 20, 2009Sv Probe Pte LtdSpring loaded probe pin assembly
US7639031 *Mar 7, 2006Dec 29, 2009Via Technologies, Inc.Testing assembly for electric test of electric package and testing socket thereof
US8251755 *Jun 14, 2010Aug 28, 2012Tyco Electronics CorporationConnector with a laterally moving contact
US20110306251 *Jun 14, 2010Dec 15, 2011Tyco Electronics CorporationConnector with a laterally moving contact
DE3233674A1 *Sep 10, 1982Mar 15, 1984Siemens AgTest adapter for IC sockets on equipped circuit boards
Classifications
U.S. Classification439/700, 439/436, 439/701, 324/754.12, 324/754.2, 324/755.1
International ClassificationH01R13/22
Cooperative ClassificationH01R13/22
European ClassificationH01R13/22