US3553635A - Electrical interconnecting system and parts - Google Patents

Abstract

AN INTERCONNECTION SYSTEM IS DISCLOSED WITH VARIOUS CONNECTOR DESIGNS FOR ELECTRICALLY CONNECTING CONDUCTORS TO PRINTED CIRCUIT BOARDS OR THE LIKE. IN ONE FORM, THE CONNECTOR RECEIVES WIRE CONDUCTORS AND IS PLUGGABLE INTO A RECEPTACLE MOUNTED ON A PRINTED CIRCUIT BOARD. IN ANOTHER FORM, THE CONNECTOR RECEIVES WIRE CONDUCTORS AND ENDWISE RECEIVES A PRINTED CIRCUIT BOARD TO FUNCTION AS AN EDGE CONNECTOR FOR THE BOARD.

Description

Jan. 5, 1971 LUNDERGAN ET AL 3,553,635

ELECTRICAL INTERCONNECTING SYSTEM AND PARTS Original Filed Sept. 27, 1967 '4 Sheets-Sheet 1 Jan- 5; 1971 G LUNDERGAN ETAL 3 ,553,635

ELECTRICAL INTERCONNECTING SYSTEM AND PARTS Original Filed Sept. 27, 1967 4 Sheets-Sheet 2 Jan. 5, 1971 R 5 LUNDERGAN ETAL 3,553,635-

ELECTRICAL INTERCONNECTING SYSTEM AND PARTS Original Filed Sept. 27, 1967 4 Sheets-Sheet 3 Jan. 5, 1971 R, G LUNDERGAN ETAL 3,553,635

ELECTRICAL INTERGONNECTING SYSTEM AND PARTS Original Filed Sept. 27/1967 4 Sheets-Sheet 4 United States Patent O 3,553,635 ELECTRICAL INTERCONNECTING SYSTEM AND PARTS Robert Graham Lundergan and Charles Edward Reynolds,

Camp Hill, Pa., assignors to AMP Incorporated, Harrisburg, Pa.

Original application Sept. 27, 1967, Ser. No. 671,061, now Patent No. 3,488,628, dated Jan. 6, 1970. Divided and this application Sept. 5, 1969, Ser. No. 855,512

Int. Cl.H01r 13/12, 13/42 U.S. Cl. 339-258 1 Claim ABSTRACT OF THE DISCLOSURE An interconnection system is disclosed with various connector designs for electrically connecting conductors to printed circuit boards or the like. In one form, the connector receives wire conductors and is pluggable into a receptacle mounted on a printed circuit board. In another form, the connector receives wire conductors and endwise receives a printed circuit board to function as an edge connector for the board.

CROSS-REFERENCE TO RELATED APPLICATION This application is a division of application Ser. No. 671,061, filed Sept. 27, 1967, now Pat. No. 3,488,628, issued Jan. 6, 1970.

BACKGROUND OF THE INVENTION (1) Field of the invention The invention is for use in the electrical field for connecting various components in a modular system. The connectors have general utility and are not restricted to the specific system shown in the drawings.

(2) Description of the prior art U.S. Pats. Nos. 3,060,402 and 3,156,517, disclose solder well terminals which perform a portion of the functions performed by the instant connectors; however, the structural differences between the prior art and the instant connector permits the latter to have extreme versatility in various modular arrangements.

SUMMARY OF THE INVENTION The plug connector has inwardly directed prongs for receiving and holding wire conductors prior to dip soldering the connector. The receptacle is insertable in a printed circuit board for frictionally receiving the plug connector. An alternative form connector is not pluggable but rather frictionally receives a printed circuit board to connect the board to wire conductors contained within the connector.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a perspective View of a modular system employing the teachings of the present invention;

FIG. 2 is a perspective view showing another modular system showing a modification of the invention;

FIG. 3 is an exploded perspective view of a connector and mounting block;

FIG. 4 is a perspective view partly in section showing the connector of FIG. 3 in position on a mounting board;

FIG. 5 is a cross-sectional view taken along the line 5-5 of FIG. 6 and showing interior details of the con nector of FIG. 4;

FIG. 6 is a cross-sectional view taken along the line 6-6 of FIG. 5;

FIG. 7 is an exploded perspective view showing a receptacle and circuit board;

FIG. 8 is a perspective view showing the receptacle of FIG. 7 mounted within a board;

FIG. 9 is a view partly in section showing the connector of FIG. 4 mated with the receptacle of FIG. 8;

FIG. 10 is a cross-sectional view taken along theline 10--10 of FIG. 9;

FIG. 11 is a side elevational view of an alternative form of connector;

FIG. 12 is an exploded side elevational view of a further modified form of connector and receptacle;

FIG. 13 is a view similar to FIG. 12 and showing the parts in their assembled position;

FIG. 14 is a front elevational view of the receptacle shown in FIGS. 12 and 13;

FIG. 15 is a top plan view of the receptacle shown in FIG. 14; and

FIG. 15A is a bottom perspective view of the receptacle shown in FIGS. 12-14.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The attainments of the present invention will become apparent to those skilled in the art upon a reading of the following detailed description when taken in conjunction with the drawings in which there are shown and described illustrative embodiments of the invention; it is to be understood, however, that these embodiments are not intended to be exhaustive nor limiting of the invention but are given for purpose of illustration in order that others skilled in the art may fully understand the invention and the principles thereof and the manner of applying it in practical use so that they may modify it in various forms, each as may be best suited to the conditions of a particular use. 7

In FIG. 1 there is shown a modular system which may be a portion of a television or radio receiver or the like. Achassis 20 is shown having provision for mountinginsulating blocks 22. Theblocks 22 have a series of apertures disposed therealong for receivingelectrical connectors 24 and 26. The connectors receivewire conductors 48 and are pluggable within receptacles 3 0 and 32 respectively. Thereceptacles 30 and 32 are shown mounted for example on a printedcircuit board 34 having electrical components 36 on its top surface and printedcircuit strips 38 disposed along its lower surface.

Theconnector 24 will now be described with particular reference to FIGS. 3-6. Theinsulating board 22 has a series of generallyrectangular openings 40 disposed therein for receiving theconnectors 24. The connectors are inserted within the opening and are positioned therein bystop means 42 disposed along opposite sides of the connectors. The lower end of the connector has tine means 44 for passing through theopenings 40 to be bent outwardly for engaging the lower surface ofmember 22 to secure the connectors in position.

Connectors 24 are preferable formed from a single flat sheet metal which sheet is wrapped into a generally rectangular configuration with the two ends of the sheet forming aseam 46. The lower portion of the connector is open for receivingelectrical conductors 48 inserted throughmember 22 into the connector.

A plurality ofcontact fingers 50 are struck from thesidewall portions 52 of the connector and are bent inwardly to a position whereat thefree ends 54 of the fingers lie closely adjacent the opposite internal surface of the connectors from which the fingers are struck. The free ends of the fingers are bent so as to lie in a plane which is at a steep angle to the plane of the sidewalls of the connector.

Thetop end portion 56 of the connector is bent over into a generally closed configuration. Theconductors 48 are inserted into the connector until their end portions seat againstend 56 of the connector. The connector shown in the drawings has three contact fingers and is designed to receive up to three electrical conductors. This number may, of course, vary to suit the conditions of a particular use. Each of the conductors '48 will be held within theconnectors 24 by one of thecontact fingers 54 acting in cooperation with an internal surface of the connector (see FIGS. and 6). It can be seen that each of the fingers acts independently of the other fingers thereby permitting the connector to receive conductors of varying size such as shown in FIG. 6 of the drawings.

The force exerted by the fingers is sufiicient to retain the conductors in position Within theconnector 24. In normal use themember 22 will have a row ofconnectors 24 mounted therein withconductors 48 extending within each of the connectors. The entire assembly will then be dip-soldered causing the entire internal area of the connectors to become filled with solder thereby making a permanent electrical connection between the connectors and conductors. Themembers 22 may then be secured in some fashion to thechassis 20 in posiiton for the upper ends 56 of the connectors to be inserted within mating receptacles.

Theconnectors 24 will mate with thereceptacles 30 shown in FIG. 1 and illustrated in FIGS. 7-10. The receptacles are normally mounted on a printed circuit board on the same side as the electrical component so that the entire assembly can be flow-soldered as one unit. Theboard 34 will be provided with a row ofrectangular openings 58 which openings extend through the board and intersect thecircuitry 38 on the lower side of the board. Thereceptacle 30 are inserted into the board from the lower side and are limited in the direction of insertion by stop means 60 extending outwardly from the lower portion of the receptacle. Stop means 60 is adapted to be bent into contact with the circuitry strips 38 in a manner as shown in FIG. 8. The receptacle comprises astrap portion 64 from which extends a pair ofcontact members 66 for cooperating with theconnectors 24 as will be described. A pair ofears 68 extend from anupper strap portion 70 said ears serving to limit outward movement of thecontacts 66. Theears 68 may be conveniently formed by coining or similar operation. A pair ofsidewall portions 72 extend between thestrap portions 64 and 70 and have their lower portions bowed outwardly (see FIG. for spreading beyond the sides ofopenings 58 to prevent withdrawal of the receptacles through theboard 34. There are largeopen areas 74 provided around the contacts '66. When the board 3-4 has all of thereceptacles 30 positioned within theopenings 58 the entire board will be dip-soldered to permanently connect thestops 60 to thecircuitry 38. During the soldering operation the solder will tend to enter the receptacle by capillary action but the largeopen areas 74 prevent the solder from entering the receptacle. Theareas 74 provide a discontinuity in the receptacle to thus offset the capillary action. After the soldering operation theboard 34 is ready for assembling onto thechassis 20 and this is done by lowering the board to cause theconnectors 24 to enter thereceptacles 30 whereby thecontacts 66 will engage the side surfaces of the connectors to thereby electrically connect theconductors 48 with the conductors 3 8.

In FIG. 11 there is shown aconnector 76 which is similar to theconnectors 24 previously described with the exception thatconnector 76 is not for insertion within a receptacle but rather has acontact arm 78 which extends from one side of the connector and lies generally parallel to an external surface of the connector. Theconnector 76 receives a printedcircuit board 79 or the like into the opening created by thearm 78 in a manner such as shown in FIG. 2. Thearm 78 has a U-shaped section at its free end as indicated at 80 to thus yield a pair of runners which will contact the circuitry of a board inserted into the connector. Theconnector 76 thus serves to electrically join theconductors 48 which extend into the connector with the circuitry on the printedcircuit board 79.

In FIG. 12 there is shown a further modification of the connector and receptacle of the instant invention. Theconnector 26 is identical to theconnector 24 previously described with the exception thatconnector 26 has a circular rather than rectangular cross-sectional configuration. Thereceptacle 32 is mounted onboard 34 in the same manner as thereceptacles 30 previously described except that thereceptacle 32 is designed to receive thecylindrical connector 26.Receptacle 32 is generally of an inverted U-shaped configuration. Thesidewalls 82 of the receptacle engage the upper surface ofboard 34 and cooperate with the lower stop means 84 for retaining the receptacle in position.Tines 86 are connected to thecircuitry 38 in the same manner as thestops 60 on thereceptacle 30. On each sidewall stop means 84 are spaced so as to straddlecircuitry 38 which is overlapped byline 86. Thesidewalls 82 of the receptacle are joined by a top portion having acircular opening 87 disposed therein. The diameter of the opening is slightly smaller than the external diameter ofconnector 26. When the connectors are inserted into thereceptacles 82 the connectors will cause thesidewall portions 82 to spread thus causingopening 87 to spread to receive the connector and to engage tightly the external surface of the connectors. The spreading of the receptacle is permitted by the slottedportions 88. The normal resiliency of thereceptacle 32 is suflicient to establish a good electrical connection between the receptacle and theconnector 26.

Changes in construction will occur to those skilled in the art and various apparently different modifications and embodiments may be made without departing from the scope of the invention. The matter set forth in the foregoing description and accompanying drawings is offered by way of illustration only. The actual scope of the invention is intended to be defined in the following claim when viewed in its proper perspective against the prior art.

We claim:

1. A receptacle for mounting in a board having circuitry on at least one external surface thereof, said receptacle comprising stop means for limiting insertion of said receptacle into said board, time means adjacent said stop means for engaging the circuitry on said board, sidewall portions disposed along said receptacle, said sidewalls being angularly disposed for preventing withdrawal of said receptacle from said board, an end portion having a circular opening therein for receiving a connector inserted through said board and into said receptacle, said sidewalls and said end portion including said circular opening being separated into resilient plural segments, said circular opening being smaller in diameter than said connector, whereby upon insertion of said connector into said circular opening electrical contact between the end POItiOl defining said circular opening and said contact 1s ma e.

References Cited UNITED STATES PATENTS 1,704,515 3/1929 Rau 339--220'(T) 3,026,496 3/1962 Gluck 339258(P) 3,060,402 10/ 1962 Olsson et al 33'9258 3,156,517 10/1964 Maximoff et al 339220 FOREIGN PATENTS 1,250,743 12/1960 France 339258 (A) MARVIN A. CHAIMPION, 'Primary Examiner P. A. CLIFFORD, Assistant Examiner U.S. Cl. X.R. 339-17, 217

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