US3218603A - Circuit board connector - Google Patents

Circuit board connector Download PDF

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Publication number
US3218603A
US3218603A US151237A US15123761A US3218603A US 3218603 A US3218603 A US 3218603A US 151237 A US151237 A US 151237A US 15123761 A US15123761 A US 15123761A US 3218603 A US3218603 A US 3218603A
Authority
US
United States
Prior art keywords
contact
connector
circuit board
board
bore
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
US151237A
Other languages
English (en)
Inventor
Eugene F Sanislo
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.)
FCI USA LLC
Original Assignee
Burndy 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
Priority to BE624609D priority Critical patent/BE624609A/xx
Application filed by Burndy Corp filed Critical Burndy Corp
Priority to US151237A priority patent/US3218603A/en
Priority to GB41343/62A priority patent/GB1020344A/en
Priority to DE19621440797 priority patent/DE1440797B2/de
Priority to FR914886A priority patent/FR1338800A/fr
Application granted granted Critical
Publication of US3218603A publication Critical patent/US3218603A/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
    • 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
    • H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/20—Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/02—Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter

Definitions

  • Circuit board connectors are Well known in the prior art.
  • the boards have a plurality of spaced apart, parallel contact surfaces which are engaged by a plurality of mating, spaced-apart, parallel resilient contacts.
  • These contacts are usually permanently mounted in the connector insulating body, and conductors are usually permanently connected thereto. Replacement of an individual contact is diicult, if not impossible.
  • the portion of the connector Contact which electrically engages the board contact surface is customarily formed in a resilient configuration to provide at least a minimum mechanical pressure on the board contact surface by the connector and thus to assure an adequate electrical connection therebetween. Too little pressure may permit an intermittent, noisy, or high voltage drop connection. This is of particular significance when Very low energy circuits or dry circuits operating at micro-volt and microampere levels are to be connected.
  • This mechanical pressure is applied by each connector contact regardless of whether a conductor is connected to the contact or not. The Wear resulting from this pressure on the board contact surface and the connector contact is thus effected each time the board is inserted into or removed from the connector.
  • each contact is individually insertable and removable from said connector, and wherein a plurality of conductors may be individually connected to and disconnected from an individual contact, thereby permitting the ready replacement or rearrangement of contacts and conductors.
  • Another object is to provide a connector wherein a connector contact to which no conductor is connected applies but a minimum pressure to the associated board contact surface; while a connector contact to which a conductor is connected applies a higher pressure, thereby reducing the wear caused by nonconnected contacts, yet providing adequate pressure by connected contacts.
  • a further object is to provide a connector wherein all conductors may be concurrently connected to their contacts after the circuit board has been inserted into the connector, and disconnected before the board is removed, thereby minimizing wear on all the board contact surfaces.
  • Still another object is to provide a connector of miniature design which can be economically fabricated and assembled.
  • FIG. 1 is a partial front View of a connector embodying this invention
  • FIG. 2 is a side view in section taken along line 2 2 of FIG. 1 showing the connector with circuit board and wire terminations installed;
  • FIG. 3 is a side View in section taken along line A-A of FIG. 1 showing the connector with its contact spring and without either a circuit board or Wire terminations installed;
  • FIG. 4 is a side view in section taken along line 2-2 of FIG. 1 with a circuit board installed but showing a wire termination being inserted and a wire termination being extracted;
  • FIG. 5 is a side view in section taken along line A-A of FIG. l showing only the connector body
  • FIG. 6 is a side view in section taken along line B-B of FIG. l showing only the connector body
  • FIG. 7 is a side view of a polarizing key for use with the connector of FIG. l.
  • FIG. 8 is a side view of the polarizing key of FIG. 7 assembled to the connector body.
  • the connector 11 comprises a substantially rectangular solid shaped body 13 made of suitable insulating material, such as diallyl phthalate; a plurality of spring contacts 15 which may be bent up from round wire stock of a suitable conductive, yet resilient material, such as heat treated beryllium copper; and a plurality of conductor or Wire terminations 17 Which may be bent into an L-shaped cross-section from stamped ilat stock of a suitable conductive and rigid material, such as cartridge brass.
  • suitable insulating material such as diallyl phthalate
  • spring contacts 15 which may be bent up from round wire stock of a suitable conductive, yet resilient material, such as heat treated beryllium copper
  • a plurality of conductor or Wire terminations 17 which may be bent into an L-shaped cross-section from stamped ilat stock of a suitable conductive and rigid material, such as cartridge brass.
  • the connector body has a plurality of closely spaced apart vertical bores 19 therethrough, from its front, circuit board receiving face 21, to its rear, wire termination-receiving face 23.
  • the bores are substantially rectangular in cross-section although several projections are formed onto the side walls thereof to constrict the bore.
  • the contact springs 15 As shown in FIGURES 5 and 6, each bore has a right side wall 25, a left side Wall 27, a top wall 29 and a bottom wall 31.
  • a horizontal slot 33 is formed into the front face of the connector body and extends partially into all the vertical bores 19.
  • the horizontal slot 33 is adapted to receive the circuit board 35.
  • Suitable mounting means may be provided for the connector body, such as a pair of flanges on its ends which include holes for mounting bolts.
  • Circuit boards customarily have a plurality of spacedapart parallel, contact strips or surfaces 37, as shown in FIGURE 2, adjacent and perpendicular to the leading edge of the board which is inserted into the connector. These contact surfaces may be on one or both sides of the circuit board. It is desirable that the center-to-center spacing of the board contact surfaces and the connector contacts be identical and coincident.
  • the connector contact springs 15, best shown in FIG- URE 3, are formed in what is essentially a U shape with a medial rear portion 39. Each leg portion 41 and 43 of the U extends by two reverse bends 45 and 47, and 49 and 51 into a Z shaped inward-going portion having three be bowed slightly to provide a two-point contact surface 69 and 71, and 73 and 75 to engage the card contact sur faces 37.
  • a plurality of bore side wall projections are provided to constrict the bore 19.
  • Continuous webs 77 and 79 are formed from the left sidewall 27 to the right sidewall 25 above and below the circuit board slot 33 to provide a closed entry which limits the ⁇ thickness of the board 35 which may be inserted into the slot 33.
  • the rear surfaces 81 and 83 ofthe webs serve as front stops for the contact spring and prevent overi'nsertion of the contact spring 15 into the bore 19.
  • the top and bottom walls 29 and 31, respectively, together with the webs 77 and 79, provide recesses 84 and 86, respectively, in which the hooks 65 and 67 of the contact spring 15 are free to move vertically.
  • a projection 85 extends horizontally from the vertical center of the right sidewall to constrict more than one half of the width of the bore 19.
  • the front surface 87 of the projection 85 serves as a rear stop for the contact spring 15 by engaging the medial portion 39 of the contact spring.
  • pair of projections 88 and 89 are also formed von the right side wall 25 above and below the board slot 33, respectively. These projections serve to space the contact spring 15 away from the right sidewall.
  • the rear face 91 of the projection 89 extends somewhat further to the rear of the bore 19, and the projection 89 is closer to the bottom wall 31 than is the rear face 93 of the projection 88, which is further from the top wall 29.
  • a similar, but reversed, pair of projections 95 and 97 are formed on the left sidewall. However, projection 95 differs from projection 97 by having a gradual or sloping rear cam surface 99 rather than an abrupt one.
  • the cam surface 99 which is forward of the projection surface 87, serves to shift the spring leftwards to the center of the bore as the spring passes forward of the projection 85.
  • the contact spring is snap-locked in the forward portion of the bore 19.
  • the inner legs 57 and 63 of the Z project into the board slot 33, and as seen in FIGURE 2, resiliently engage the board contact surfaces 37.
  • the contact spring may be extracted by inserting a suitable tool, not shown, to deflect the medial portion 39 of the spring away from the surface 87 and then moving the spring towards the rear of the bore and out of the connector body.
  • each wire termination 17 is formed with an L-shaped cross section, web 103 being the shorter leg of the L and slightly less in width than the width of the bore 19.
  • the thickness ofthe longer web 105 is made equal to or slightly less than the thickness of the projection 88 or 97 to aid in centering the spring 15 within the bore.
  • the rear end of each wire termination 17 is formed with a pair of U-shaped cross sections which are crimped over and into thewire 107; forward U section 109 grasps the bare wire 111 while rearward U section 113 grasps the insulation of the wire. Both sections are crimped into an elliptical cross section to minimize the total width of the wire plus termination.
  • a forward portion 115 of the short web is struck up slightly to provide a detent which will engage a shoulder 117 or 119 provided in top and bottom walls of the bore, respectively.
  • the wire terminations 17 may be inserted into the rear of the bore 19, short web 103 sliding between the top or bottom bore wall 29 or 31 and the outer leg 53 or 59 of the contact spring respectively, until detent 115 snaps into place forward of shoulder 117 or 119.
  • the long web 105 pasess to the side of the contact spring and assists the several bore projections in centering the contact spring in the bore.
  • The' contact spring resiliently presses against the wire termination, pressing it against the top or bottom wall of the bore, and also maintains electrical connection with the spring.
  • the release of the wire terminations is effected by disengaging the detent from the bore shoulder 117 or 119, as by a tool 121 slid between the termination and the wall, and pulling the termination out of the bore, as by a projection 123 on the tool engaging a shoulder 125 on the termination 17.
  • the wire termination may be inserted 4or extracted regardless of whether the board is inserted between the legs of the contact spring or not.
  • the insertion of the termination 17 is polarized with respect to the bore 19 tothe vertical plane by the height of the longer web 105 being greater than the width of the bore, and forwardly and rearwardly within the vertical plane by either the rear surface 91 of projection 89, or the medial portion 39 of the Contact spring obstructing further insertion of the narrow web 103, if the narrower web is centrally directed with respect to the bore, rather than correctly outwardly.
  • the wire termination when inserted, reduces the vertical distance available to the Z portion of the contact spring, thereby increasing its compression and thus the pressure it' will exert on the board contact surface 37.
  • the wire termination when inserted, reduces the vertical distance available to the Z portion of the contact spring, thereby increasing its compression and thus the pressure it' will exert on the board contact surface 37.
  • a polarizing key 127 such as is shown in FIGURE 7 may be utilized to block off individual bores in the connector.
  • the key is substantially of U shape, having a medial reverse bend 129, and a pair of upset detents 131 and 133 on legs 135 and 137, respectively.
  • the key may be inserted fromy the front of the connector, legs 135 and 137 passing through and beyond the bore so that detents 131 and 133 snap behind the rear surface of the connector body 13.
  • shoulders not shown, similar to shoulders 117 and 119 may be formed in the ⁇ top and bottom walls of the bore to receive detents 131 and 133.
  • the width of the key is equal to or less than the width of the bore.
  • the key is adapted to c0- operate with a mating slot cut into the leading edge of the cards.
  • the legs of the key projecting slightly to the rear of the connector, serve as an indication that no termination is to be inserted into that specific bore.
  • An electrical connector for a circuit board having a plurality of side-by-side spaced-apart conductor surfaces disposed adjacent the leading edge of Vthe board comprising: a connector body having a plurality of side-by-side spaced-apart channels extending therethrough and a transversely extending slot intersecting each of said channels for receiving the leading edge of said board therein; a plurality of contact springs each adapted to be inserted into one of said channels and each having a contact surface for resiliently engaging and applying a given pressure to a conductor surface on a circuit board inserted into said slot, wherein .a portion of each contact spring is resiliently compressed between a Wall of said channel and a conductor surface upon insertion of said circuit board; a plurality of insertable and removable wire termination members adapted to be inserted into the channels to electrically engage the contact springs therein for completing electrical paths between said circuit board conductor surfaces and external wire conductors, through said springs, each of said termination members being disposed between the wall of said channel and the corresponding

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
US151237A 1961-11-09 1961-11-09 Circuit board connector Expired - Lifetime US3218603A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE624609D BE624609A (sr) 1961-11-09
US151237A US3218603A (en) 1961-11-09 1961-11-09 Circuit board connector
GB41343/62A GB1020344A (en) 1961-11-09 1962-11-01 Circuit board connector
DE19621440797 DE1440797B2 (de) 1961-11-09 1962-11-06 Elektrische Steckverbindung zum Anschluß von Leitern an eine gedruckte Schaltungsplatte
FR914886A FR1338800A (fr) 1961-11-09 1962-11-09 Connecteur pour panneau porteur de circuits électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US151237A US3218603A (en) 1961-11-09 1961-11-09 Circuit board connector

Publications (1)

Publication Number Publication Date
US3218603A true US3218603A (en) 1965-11-16

Family

ID=22537885

Family Applications (1)

Application Number Title Priority Date Filing Date
US151237A Expired - Lifetime US3218603A (en) 1961-11-09 1961-11-09 Circuit board connector

Country Status (4)

Country Link
US (1) US3218603A (sr)
BE (1) BE624609A (sr)
DE (1) DE1440797B2 (sr)
GB (1) GB1020344A (sr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289146A (en) * 1963-04-29 1966-11-29 Tuchel Ulrich Contact arrangement
US3732531A (en) * 1971-06-16 1973-05-08 Bunker Ramo Electric contacts
US3794961A (en) * 1971-05-03 1974-02-26 Switchcraft Electrical twin plug
US3941448A (en) * 1974-07-29 1976-03-02 E. I. Du Pont De Nemours & Company Connector block
US4668042A (en) * 1984-10-10 1987-05-26 The General Electric Company, P.L.C. Electrical connectors
EP0959649A1 (en) * 1997-08-11 1999-11-24 Ohkura Electric Co, Ltd. Temperature measuring type outside connecting mechanism for printed wiring board
US20070167048A1 (en) * 2004-02-19 2007-07-19 Achim Puettner Direct plug-in connection including a cable end sleeve
WO2016173809A1 (de) * 2015-04-27 2016-11-03 Phoenix Contact Gmbh & Co.Kg Verbinder für leiterplatten

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457703A (en) * 1946-11-23 1948-12-28 Gen Railway Signal Co Plugboard arrangement
US2640970A (en) * 1950-06-13 1953-06-02 Gen Motors Corp Electrical connector having a spring-biased line terminal
US2793354A (en) * 1954-03-02 1957-05-21 Gen Railway Signal Co Plug-in connector type terminal board
US2911612A (en) * 1956-01-26 1959-11-03 Jackson Anton Printed circuit contact receptacles
US2983896A (en) * 1958-09-10 1961-05-09 Continental Connector Corp Multiple electrical connector with selectively positionable polarizing member
US3024436A (en) * 1958-02-17 1962-03-06 Gen Motors Corp Receptacle for printed circuit boards
US3047832A (en) * 1959-09-11 1962-07-31 Sealectro Corp Electrical socket contacts
US3047831A (en) * 1960-01-11 1962-07-31 United Carr Fastener Corp Snap-in contact for edge connector
US3048811A (en) * 1957-09-26 1962-08-07 Painton & Co Ltd Socket connector for printed circuit board

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457703A (en) * 1946-11-23 1948-12-28 Gen Railway Signal Co Plugboard arrangement
US2640970A (en) * 1950-06-13 1953-06-02 Gen Motors Corp Electrical connector having a spring-biased line terminal
US2793354A (en) * 1954-03-02 1957-05-21 Gen Railway Signal Co Plug-in connector type terminal board
US2911612A (en) * 1956-01-26 1959-11-03 Jackson Anton Printed circuit contact receptacles
US3048811A (en) * 1957-09-26 1962-08-07 Painton & Co Ltd Socket connector for printed circuit board
US3024436A (en) * 1958-02-17 1962-03-06 Gen Motors Corp Receptacle for printed circuit boards
US2983896A (en) * 1958-09-10 1961-05-09 Continental Connector Corp Multiple electrical connector with selectively positionable polarizing member
US3047832A (en) * 1959-09-11 1962-07-31 Sealectro Corp Electrical socket contacts
US3047831A (en) * 1960-01-11 1962-07-31 United Carr Fastener Corp Snap-in contact for edge connector

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289146A (en) * 1963-04-29 1966-11-29 Tuchel Ulrich Contact arrangement
US3794961A (en) * 1971-05-03 1974-02-26 Switchcraft Electrical twin plug
US3732531A (en) * 1971-06-16 1973-05-08 Bunker Ramo Electric contacts
US3941448A (en) * 1974-07-29 1976-03-02 E. I. Du Pont De Nemours & Company Connector block
US4668042A (en) * 1984-10-10 1987-05-26 The General Electric Company, P.L.C. Electrical connectors
EP0959649A1 (en) * 1997-08-11 1999-11-24 Ohkura Electric Co, Ltd. Temperature measuring type outside connecting mechanism for printed wiring board
EP0959649A4 (en) * 1997-08-11 2000-09-20 Okura Denki Co Ltd TEMPERATURE MEASURING EXTERNAL CONNECTING MECHANISM FOR PCB
US20070167048A1 (en) * 2004-02-19 2007-07-19 Achim Puettner Direct plug-in connection including a cable end sleeve
US8342868B2 (en) * 2004-02-19 2013-01-01 Robert Bosch Gmbh Direct plug-in connection including a cable end sleeve
WO2016173809A1 (de) * 2015-04-27 2016-11-03 Phoenix Contact Gmbh & Co.Kg Verbinder für leiterplatten

Also Published As

Publication number Publication date
GB1020344A (en) 1966-02-16
BE624609A (sr)
DE1440797A1 (de) 1969-01-23
DE1440797B2 (de) 1969-11-27

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