Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3337838 A
Publication typeGrant
Publication dateAug 22, 1967
Filing dateDec 16, 1964
Priority dateDec 16, 1964
Also published asDE1515526A1, DE1515526B2
Publication numberUS 3337838 A, US 3337838A, US-A-3337838, US3337838 A, US3337838A
InventorsDamiano Ralph R, Knowles Robert G
Original AssigneeBurndy Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Wiping contact
US 3337838 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

A g- 1967 R. R. DAMIANO ET A ,8

WIP N CONTACT Filed Dec. 16, 1964 INVENTOR. RALPH R. DAMIANO ROBERT G. KNOWLES ATTORNEY 3,337,838 WIPIN G CONTACT Ralph R. Damiano, Naugatuck, and Robert G. Knowles, Norwalk, Conn., assignors to Burndy Corporation, a corporation of New York Filed Dec. 16, 1964, Ser. No. 418,749 2 Claims. (Cl. 339-217) ABSTRACT OF THE DISCLOSURE A separable electrical connector in which an insulating housing having a plurality of extending posts and recessed sockets is provided with contact members mounted .to the posts. The posts are shaped to receive the contacts in openings therein and the contacts are shaped to interlock with the posts. Means for permitting release of the contacts from the post are included.

This invention relates to an electrical contact and more particularly to a wiping contact which may be readily inserted into the socket of a mating connector, and securely supported therein.

The problem of secure retention of individual electrical contacts arises especially in multiple connectors in which dozens and sometimes hundreds of terminal contacts are individually inserted. When the mating connectors are coupled together, a failure in alignment and/ or retention of a single contact may destroy the integrity of the entire connector.

Among the objects of this invention are to provide individual electrical contacts that are self aligning when inserted; that will seat themselves accurately in a socket; that provide multiple wiping surfaces to insure maximum area of contact; that are readily defiectable and self adjusting; that may be made of a single piece of sheet metal; that are individually replaceable; that are relatively simple to insert, reliable in operation and easy to connect and disconnect.

These and other objects are accomplished, and new results obtained as will be apparent from the device hereinafter described, particularly pointed out in the at tached claims, and illustrated in the accompanying drawings in which:

FIG. 1 is a perspective view of an electrical tenminal contact made in accordance with the invention;

FIG. 2 is a development plan view of the sheet metal blank from which the contact is made;

FIG. 3 is a perspective view of a pair of mating electrical connectors which may employ the terminal contacts of FIG. 1;

FIG. 4 is a sectional view taken through a pair of mating connectors into which the terminal contact has been inserted.

Referring now more in detail to the drawings, in FIGS. 1 and 2, reference numeral designatesgenerally a sheet metal blank in the form of a flat stamping from which the terminal contact is developed.

Accordingly the blank is provided with a lip portion 12, a slot from which a portion of the metal is removed and a portion is retained to form a tongue 14 positioned in the slot, a second tongue similarly formed in a slot 18, and still a third tongue 21 formed in a slot 19; a pair of ears 22 extending laterally from both sides of the body of the blank 10, a double pair of ears 24 and 24a longitudinally spaced from cars 22, and a pair of insulation gripping ears 26 are also included.

In production, the blank is folded back upon itself approximately along line AA to form a set of parallel spaced apart surfaces 10a and 10b. Tongue 14 is bent to extend somewhat at an angle 'to the plane of the rear face 10b as shown in FIG. 1. Tongue 21 is likewise bent outwardly to extend at an angle to the face 1% in a direction substantially opposite the direction of tongue 14. To create greater stiffness, for a purpose discussed below, tongue 21 may be formed into the spout or channel shape shown. Further, tongue 20 is either separately or simultaneously bent inwardly to extend from the inner face of portion 10b toward the back of face 10a; this tongue thus serves as a back-up support for face 10a, adding to its stiffness and preloading it to achieve higher and more positive contact pressure. Ears 22 are then formed into a bridge over the extending lip 12 to help maintain the portion 10a in preloaded relationship substantially parallel .to face 10b.

Tongue 21 is bent to extend outwardly from the rear face 10b for a purpose hereinafter explained.

In use, after portions 10a and 1012 have been shaped as described a conductor 30 is placed along the axis of the blank between ears 24 and 24a and the ears are then crimped over to grip the conductor. Bars 26 are similarly crimped over to grip the shroud or insulation 32 on the conductor.

The terminal contact thus formed and installed on a conductor, may be employed in a composite connector assembly such as is formed by the terminal blocks 40a and 40b, shown in FIGS. 3 and 4. Each block is provided with socket apertures 42 which project through the base 44 and open into the slots 46 formed in the sides of upright plugs 50. The plugs 50 are arrayed in a checkerboard pattern on the base 44. Face 10a of the formed contact 10, serves as a wiping area for a corresponding contact which is mounted in cooperating position on the complementary connector block as shown in FIG. 4. The tongue 14 is positioned in an aperture 52 which is formed in the top of each slot 46. As illustrated, it serves to more securely position the tip of the contact within slot 46; it may however be deleted entirely, if desired, to facilitate extraction of the contact from the connector block.

'Ea'ch contact is inserted into a socket 42 from the back face 54 of the block 40a or 4012. At an appropriate point intermediate the ends of the slot 46, a small shouder 56 is formed on the base of the slot for engaging the sprin'gy tongue 21 which projects outwardly from the rear of the contact. When the contact has been fully inserted into the socket this shoulder thus securely locks it against inadvertent withdrawal. If desired, an aperture 58 may be provided in the top of each plug 50, opening into each slot 46, to permit a suitable tool to be inserted into the socket for deflecting the tongue 21 to disengage it from the shoulder 56. This procedure thus permits extraction of the contact from the socket for replacement or inspection. Similarly, a tool may be inserted from back face 54 between the contact and the base of slot 46 for the purpose of deflecting the entire contact sufiiciently to disengage tongue 21 from shoulder 56. Two extraction procedures are thus possible.

When the sockets are filled with the required number of contacts, duly connected, the two connector halrves are mated, the plugs 50 from one connector half fitting into the space between the plugs of the other connector half. The individual plugs may be rectangular in crosssection, with each face thereof other than those on the outer perimeter of the array filled with engaging contacts.

The mating bloc-ks 40a and 40b may be made of any suitable insulating material such as a polycarbonate, and provided with abutting flanges 59 to enclose the plugs when contact is made. Extensions or lips 60 may also be formed on the blocks, having openings 62 for receiving connecting bolts (not shown) used in clamping the two connector halves together.

The contact 10, made of a conductive metal such as copper or brass suitable for electrical purposes, may readily be made sufiiciently wide and thick to provide adequate current carrying capacity for its intended purpose. It is preferably work hardened, or made of springy material to function as a resilient contact.

The contact design provides a springy engaging surface for resilient engagement of corresponding contacts. The outward movement of each contact face 10a is limited by the ears 22 which overlap the lip portion 12. Rearward support for face 10a is provided by tongue 20. Tongue 21 simply and securely locks the contact in its housing. The slot from which tongue 14 is formed also permits the two segments of face 10a thus for-med to act substantially independently in adjusting to any unevenness in a mating surface. The ears 24, 24a and 26 provide a substantial electrical and mechanical grip on the conductor 30 and its insulation 32 respectively.

The invention has thus been described but it is desired to be understood that it is not confined to the particular forms or usages shown and described, the same being merely illustrative, and that the invention may be carried out in other ways without departing from the spirit of the-invention; therefore, the right is broadly claimed to employ all equivalent instrumentalities coming Within the scope of the appendent claims, and by means of which objects of this invention are attained and new results accomplished, as it is obvious that the particular embodiments herein shown and described are only some of the many that can be employed to obtain these objects and accomplish these results.

We claim:

1. An electrical connector comprising: a base made of insulating material having a plurality of extending plugs and a plurality of sockets between adjacent plugs; an open slot formed in the side of an extending plug and opening into one of said sockets, and a recess formed in said slot; a metal contact longitudinally insertable into said slot, having a terminal end for engaging an electrical conductor and a wiping surface for engaging a mating contact; said contact further including a tongue formed thereon for insertion into said slot recess; said cont-act being inserted into said socket with the wiping surface thereof on the open side of the slot and positioned in said slot; said tongue engaging said recess for preventing inadvertent removal of said contact from said slot.

2. An electrical connector in accordance with claim 1 wherein said plugs include a central longitudinal opening cooperating with said slot and said recess for permitting insertion of a tool adapted to deflect said tongue to disengage it from said recess.

References Cited UNITED STATES PATENTS 2,384,273 9/ 1945 Beal 339-217 2,457,703 12/1948 Merkel 339150 2,691,147 10/1954 Sutton et al. 339-217 3,069,652 12/1962 Greco 339-2l7 X 3,160,459 12/1964 Greco et al. 339-217 X FOREIGN PATENTS 858,692 1/ 1961 Great Britain.

MARVIN A. CHAMPION, Primary Examiner.

PATRICK A. CLIFFORD, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2384273 *Aug 9, 1939Sep 4, 1945H A Douglas Mfg CoElectrical connection means
US2457703 *Nov 23, 1946Dec 28, 1948Gen Railway Signal CoPlugboard arrangement
US2691147 *Apr 2, 1951Oct 5, 1954Gen ElectricTerminal block
US3069652 *Mar 23, 1959Dec 18, 1962Burndy CorpElectrical connector for printed circuit boards
US3160459 *Feb 17, 1961Dec 8, 1964Burndy CorpConnector for printed circuit boards
GB858692A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3697926 *Jul 23, 1970Oct 10, 1972Molex Products CoPlural circuit board connecting arrangement and terminal therefor
US5308258 *Jan 29, 1993May 3, 1994International Business Machines CorporationPlanar modular interconnect system
US5330372 *May 13, 1993Jul 19, 1994Minnesota Mining And Manufacturing CompanyHigh-density connector
US5541449 *Mar 11, 1994Jul 30, 1996The Panda ProjectSemiconductor chip carrier affording a high-density external interface
US5543586 *Mar 11, 1994Aug 6, 1996The Panda ProjectApparatus having inner layers supporting surface-mount components
US5575688 *Jan 31, 1995Nov 19, 1996Crane, Jr.; Stanford W.High-density electrical interconnect system
US5576931 *May 3, 1994Nov 19, 1996The Panda ProjectComputer with two fans and two air circulation areas
US5634821 *Jun 5, 1995Jun 3, 1997Crane, Jr.; Stanford W.High-density electrical interconnect system
US5641309 *Jun 6, 1995Jun 24, 1997Crane, Jr.; Stanford W.High-density electrical interconnect system
US5659953 *Jun 5, 1995Aug 26, 1997The Panda ProjectMethod of manufacturing an apparatus having inner layers supporting surface-mount components
US5696027 *Jun 5, 1995Dec 9, 1997The Panda ProjectMethod of manufacturing a semiconductor chip carrier affording a high-density external interface
US5781408 *Jul 24, 1996Jul 14, 1998The Panda ProjectComputer system having a motorized door mechanism
US5812797 *Aug 23, 1996Sep 22, 1998The Panda ProjectComputer having a high density connector system
US5819403 *Jun 5, 1995Oct 13, 1998The Panda ProjectMethod of manufacturing a semiconductor chip carrier
US5821457 *Jul 29, 1997Oct 13, 1998The Panda ProjectSemiconductor die carrier having a dielectric epoxy between adjacent leads
US5822551 *Jun 12, 1996Oct 13, 1998The Panda ProjectPassive backplane capable of being configured to a variable data path width corresponding to a data size of the pluggable CPU board
US5824950 *Jun 7, 1995Oct 20, 1998The Panda ProjectLow profile semiconductor die carrier
US5892280 *Sep 22, 1997Apr 6, 1999Crane, Jr.; Stanford W.Semiconductor chip carrier affording a high-density external interface
US5951320 *May 13, 1997Sep 14, 1999Crane, Jr.; Stanford W.Electrical interconnect system with wire receiving portion
US5967850 *Nov 7, 1996Oct 19, 1999Crane, Jr.; Stanford W.High-density electrical interconnect system
US6073229 *Sep 2, 1997Jun 6, 2000The Panda ProjectComputer system having a modular architecture
US6078102 *Mar 3, 1998Jun 20, 2000Silicon Bandwidth, Inc.Semiconductor die package for mounting in horizontal and upright configurations
US6097086 *Feb 4, 1999Aug 1, 2000Silicon Bandwidth, Inc.Semiconductor chip carrier including an interconnect component interface
US6141869 *Oct 26, 1998Nov 7, 2000Silicon Bandwidth, Inc.Apparatus for and method of manufacturing a semiconductor die carrier
US6203347Sep 28, 1999Mar 20, 2001Silicon Bandwidth Inc.High-density electrical interconnect system
US6247972Aug 14, 1997Jun 19, 2001Silicon Bandwidth, Inc.Electrical connector assembly with a female electrical connector having internal flexible contact arm
US6339191 *Mar 11, 1994Jan 15, 2002Silicon Bandwidth Inc.Prefabricated semiconductor chip carrier
US6461197May 21, 2001Oct 8, 2002Silicon Bandwidth, Inc.Female contact pin including flexible contact portion
US6554651Jan 22, 2001Apr 29, 2003Stanford W. Crane, Jr.High-density electrical interconnect system
US6574726Mar 28, 2000Jun 3, 2003Silicon Bandwidth, Inc.Modular architecture for high bandwidth computers
US6577003Aug 1, 2000Jun 10, 2003Silicon Bandwidth, Inc.Semiconductor chip carrier affording a high-density external interface
US6828511Sep 28, 2001Dec 7, 2004Silicon Bandwidth Inc.Prefabricated semiconductor chip carrier
US6857173Nov 6, 2000Feb 22, 2005Silicon Bandwidth, Inc.Apparatus for and method of manufacturing a semiconductor die carrier
US6977432Jan 13, 2004Dec 20, 2005Quantum Leap Packaging, Inc.Prefabricated semiconductor chip carrier
US7103753 *Apr 1, 2003Sep 5, 2006Silicon Bandwith Inc.Backplane system having high-density electrical connectors
US7183646Jun 6, 2003Feb 27, 2007Silicon Bandwidth, Inc.Semiconductor chip carrier affording a high-density external interface
US7333699 *Dec 11, 2006Feb 19, 2008Raytheon Sarcos, LlcUltra-high density connector
US7603153Oct 13, 2009Sterling Investments LcMulti-element probe array
US7626123Dec 1, 2009Raytheon Sarcos, LlcElectrical microfilament to circuit interface
US7680377Mar 16, 2010Raytheon Sarcos, LlcUltra-high density connector
US7803020May 14, 2007Sep 28, 2010Crane Jr Stanford WBackplane system having high-density electrical connectors
US7881578Oct 22, 2009Feb 1, 2011Raytheon Sarcos, LlcUltra-high density connector
US7974673Jul 5, 2011Sterling Investments, LcMulti-element probe array
US8026447Sep 27, 2011Raytheon Sarcos, LlcElectrical microfilament to circuit interface
US8057240 *Mar 23, 2010Nov 15, 2011Tyco Electronics CorporationCircuit board for an electrical connector assembly
US9257778Mar 15, 2013Feb 9, 2016Fci Americas TechnologyHigh speed electrical connector
US20040007774 *Jun 6, 2003Jan 15, 2004Silicon Bandwidth, Inc.Semiconductor chip carrier affording a high-density external interface
US20040010638 *Apr 1, 2003Jan 15, 2004Silicon Bandwidth, Inc.Modular architecture for high bandwidth computers
US20040140542 *Jan 13, 2004Jul 22, 2004Silicon Bandwidth, Inc.Prefabricated semiconductor chip carrier
US20070132109 *Dec 11, 2006Jun 14, 2007Sarcos Investments LcElectrical microfilament to circuit interface
US20070134954 *Dec 11, 2006Jun 14, 2007Sarcos Investments LcUltra-high density connector
US20070167815 *Dec 11, 2006Jul 19, 2007Sarcos Investments LcMulti-element probe array
US20080005442 *May 14, 2007Jan 3, 2008The Panda ProjectBackplane system having high-density electrical connectors
US20080205829 *Feb 19, 2008Aug 28, 2008Raytheon Sarcos, LlcUltra-high density connector
US20090204195 *Feb 10, 2009Aug 13, 2009Jacobsen Stephen CMulti-Element Probe Array
US20100112865 *Oct 22, 2009May 6, 2010Jacobsen Stephen CUltra-High Density Connector
US20100116869 *Nov 9, 2009May 13, 2010Jacobsen Stephen CElectrical Microfilament to Circuit Interface
US20100323536 *Aug 10, 2010Dec 23, 2010Wolpass Capital Inv., L.L.C.Backplane system having high-density electrical connectors
US20110237091 *Sep 29, 2011Tyco Electronics CorporationCircuit board for an electrical connector assembly
USD748063Oct 9, 2014Jan 26, 2016Fci Americas Technology LlcElectrical ground shield
USD750025Feb 12, 2015Feb 23, 2016Fci Americas Technology LlcVertical electrical connector
USD750030Nov 3, 2014Feb 23, 2016Fci Americas Technology LlcElectrical cable connector
U.S. Classification439/295, 439/746, 439/284
International ClassificationH01R13/02, H01R13/432, H01R13/428, H01R13/28, H01R13/26
Cooperative ClassificationH01R13/26, H01R13/432, H01R13/28
European ClassificationH01R13/26, H01R13/432, H01R13/28