US3614706A - Ground connector - Google Patents

Ground connector Download PDF

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Publication number
US3614706A
US3614706A US44191A US3614706DA US3614706A US 3614706 A US3614706 A US 3614706A US 44191 A US44191 A US 44191A US 3614706D A US3614706D A US 3614706DA US 3614706 A US3614706 A US 3614706A
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US
United States
Prior art keywords
ground
plate
shoulders
connector assembly
terminal
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
US44191A
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English (en)
Inventor
Frank A Kukla
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.)
Malco Manufacturing Co Inc
Original Assignee
Malco Manufacturing Co Inc
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 Malco Manufacturing Co Inc filed Critical Malco Manufacturing Co Inc
Application granted granted Critical
Publication of US3614706A publication Critical patent/US3614706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01R12/7088—Arrangements for power supply
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H01R13/415—Securing in non-demountable manner, e.g. moulding, riveting by permanent deformation of contact member

Definitions

  • the assembly includes a ground terminal of one piece construction made from flat sheet stock, having an integrally formed ground section including mounting means for seating on a metal plate and a shank which extends through a generally circular cylindrical aperture in a plate and is integrally threaded at its lower end to receive a locking nut which secures the terminal tightly to the plate.
  • the configuration of the mounting means and the locking nut are such that the terminal is stabilized in perpendicular relationship to the plate and bites into the surface of the plate to provide excellent electrical contact between the terminal and the plate.
  • the invention relates in general to an electrical connector assembly of the type including a plurality of wire-wrap-type terminals mounted on a terminal plate. More particularly, it is related to a ground connector assembly for connecting a terminal pin, having a wire-wrap post on one end, with a metal plate.
  • the ground connector assembly of this invention is an improvement over that disclosed in the Walter U.S. Pat. No. 3,434,091, issued March 18, 1969, and assigned to the same assignee as the present invention.
  • a primary object of the invention is to provide a ground connector assembly which is simpler in construction, has fewer component parts, is more easily assembled, and is less expensive than those constructions presently in use and designed to accomplish the same or similar ends. In its simplicity, the present ground connector assembly achieves additional advantages. More particularly, it is another object of the invention to provide a ground connector assembly which consistently affords extremely low resistance to current flow between the terminal pin and a metal-mounting plate. A further object is to provide, in preferred embodiments, a simple, two-piece connector assembly which automatically orientates into proper radial relationship on the axis of the aperture in the plate in which it is seated.
  • a grounding terminal which is diepunched from fiat sheet stock and includes a contact section or other connecting means on one end, a wire-wrap post on the opposite end, and a ground section in between.
  • the ground section includes a rectangular cross section ground shank which extends through the plate aperture in snug fitting relationship.
  • screw threads are swaged or coined onto the edges of a portion of the shank so that they are an integral part of the terminal.
  • ground contact support shoulders are formed from the flat sheet stock. Formed on the ground contact shoulders are teeth which bit into the plate and establish excellent electrical contact with it.
  • the shoulders are so formed from the sheet stock as to cooperate with an aperture in the insulating block surrounding the contact and orientate the contact properly in the block.
  • a locking nut threaded onto the threaded portion of the ground shank impinges tightly against the opposite side of the plate to fasten the terminal tightly to the plate.
  • FIG. I is a diagrammatic plan view of a portion of a connector complex mounted on a terminal plate, wherein the connector complex includes a ground connector assembly embodying features of a first preferred form of the present invention
  • FIG. 2 is an enlarged view, partially in section, of the connector assembly of FIG. ll;
  • FIG. 3 is an enlarged view similar to FIG. 2, taken 90 from that of FIG. 2;
  • FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;
  • FIG. 5 is a sectional view taken along line 5-5 of FIG. 3, with parts removed;
  • FIG. 6 is an enlarged view of a portion of the ground section in the ground connector assembly of FIG. 3;
  • FIG. 7 is a view similar to FIG. 2 illustrating a second preferred form of the invention.
  • FIG. 5 is an enlarged view similar to FIG. 7, taken 90 from that of FIG. 7;
  • FIG. 9 is a sectional view taken along line 9--9 of FIG. 5;
  • FIG. 10 is an enlarged elevational view of a third form of the ground connector assembly embodying features of the present invention, with parts removed;
  • FIG. 11 is a sectional view taken along line ill-Ill of FIG. 10;
  • FIG. 12 is an enlarged elevational view illustrating a fourth form of the invention, with parts removed;
  • FIG. 13 is a top plan view of the ground connector assembly illustrated in FIG. 12.
  • FIG. IA is a side elevational view, partially in section of a ground connector assembly embodying features of a fifth form of the invention.
  • the connector complex 10 includes a matrix 20 of dielectric material, such as a thermoplastic or thermosetting material or the like.
  • the matrix 20 actually comprises a series of elongated printed circuit board receiving blocks 21 arranged in immediately adjacent, side-byside relationship on a terminal plate ill in the manner illustrated and described in the aforementioned Walter U.S. Pat. No. 3,434,091.
  • An end block segment 21 houses a plurality of electrical contacts (not shown) adapted to engage circuitry on a printed circuit board (not shown) inserted into the matrix 20.
  • the contacts are distinctive as components of a buss strip and contact arrangement embodying features of an invention disclosed in the Walter U.S. Pat. No. 3,434,094, issued March 18, 1969, entitled BUSS STRIP, and assigned to the same assignee as the present invention.
  • the end contact 30 is part of an improved ground connector assembly 40 embodying features of a first form of the present invention.
  • the improved ground connector assembly Ml is adapted to make electrical connection between circuitry on a printed circuit board (not shown) through the contact 30, to the terminal plate ill.
  • FIGS. 2-6 of the drawings the assembly 40 is illustrated in substantial detail.
  • the connector assembly A0 is mounted on the plate ill in a well 65 in the end block segment 21.
  • the matrix block segment 211 is seated on the upper surface 66 of the terminal plate Ill and secured to the plate in the manner described in the aforementioned Walter U.S. Pat. No. 3,434,094.
  • the ground connector assembly 40 includes the contact 30 which is an arcuate, flexible spring-type contact formed unitarily with a wire-wrap connector pin 70.
  • the connector pin 70 has the contact 30 formed unitarily on one end, and a wire-wrap post 71 on its opposite end.
  • ground section 73 Intermediate the contact 30 and the wire-wrap post 71 of the pin 70 is a ground section 73.
  • the ground section 73 includes a rectangular cross section ground shank '74 which extends through the circular cylindrical aperture 75 in the terminal plate 11.
  • the cross-sectional dimensions of the ground shank are such that it extends through the plate aperture 75 in relatively snug fitting relationship.
  • screw threads are swaged or coined into the edges of a portion 81 of the shank.
  • the threads 30 are swaged onto the shank portion 81 so that they are arranged, in cross section as illustrated in FIG. 5, integral with the pin 70.
  • ground contact shoulders 85 are formed from the fiat sheet stock of the terminal.
  • the shoulders 85 are formed from the terminal sheet stock in the manner illustrated in FIGS. 24 and 6.
  • the shoulders 35 are actually transversely extending sections of stock bent at right angles to the flat sheet stock, in opposite directions, as illustrated.
  • the body of the flat sheet stock is sheared slightly inwardly at points above and below the shoulders 55 before this forming takes place.
  • a rela tively short shear area 91 is defined and the strength of the shank portion is not impaired while the cross-sectional dimensions of the shoulders 85 are minimized.
  • the lower surfaces of the shoulders 85 are inclined downwardly to sharp tips or teeth 95 formed thereon for digging into the surface 66 of the plate 11. This intrusion into the plate surface 66 by the teeth 95, effected in a manner hereinafter described, results in excellent electrical contact being established between the terminal and the plate 1 1.
  • the well 65 in the block 21 has, in the preferred embodiment of the present illustration, a rectangular cross section, as illustrated in FIG. 4.
  • the cross-sectional dimensions of the well 65 at its base adjacent the surface 66 of the plate 11 are substantially identical to, or only slightly larger than, the overall cross-sectional dimensions of the angularly formed shoulders 85. Because of the squared-off configuration of the shoulders 85, the terminal necessarily orientates to a precise radial relationship in the block 21, when it is dropped into a corresponding well 65. As a result, the contact 30 is automatically aligned in prescribed relationship for contact with a printed circuit board.
  • the swaged threads 80 on the threaded portion 81 of the shank 73 are adapted to cooperate with internal threads (not shown) formed in a locking nut 96 until the nut tightly engages the lower surface 97 of the plate 11 to draw the teeth 95 into biting engagement with the upper surface 66 of the plate.
  • the nut 96 engages the lower surface 97 of the plate 1 1 with its an nular sealing end 98.
  • the sealing end 98 of the nut includes a frustoconical surface tenninating in a relatively thin, semisharp peripheral edge in a manner described in the aforementioned Walter US. Pat. No. 3,434,091.
  • FIGS. 7-9 a second form of ground connector assembly embodying features of the present invention is illustrated generally at 140.
  • the ground connector assembly 140 is similar to the assembly 40 hereinbefore discussed in achieving the same advantages ends. It has, however, one additional feature of significance.
  • the shoulders 185 formed on the ground section 173 of the terminal pin 170 comprise an upper set of shoulders 185a and a lower set of shoulders 185b extending in opposite directions and bent at right angles from the flat sheet stock, as illustrated.
  • the well 165 has a rectangular or substantial square cross section, as illustrated in FIG. 9.
  • the cross-sectional dimensions of the well 165 at its base, adjacent the surface 166 of the plate 111 are, again, substantially identical to, or only slightly larger than, the overall cross-sectional dimensions of the angularly formed shoulders 185
  • the terminal 170 thus necessarily orientates to a desired radial relationship in the block 121 of phenolic and the contact 130 is automatically aligned for contact with a printed circuit board.
  • FIGS. and 11 a third form of the ground connector assembly embodying features of the invention is illustrated generally at 240.
  • the ground connector assembly 240 is substantially identical to the assemblies 40 and 140 hereinbefore discussed in operation and effect. It achieves substantially the same advantageous ends with a slightly modified construction.
  • the well (not shown) in the matrix end block segment 221 of the assembly 240 is merely an elongated rectangle in cross-sectional configuration.
  • This elongated rectangular configuration is provided to accommodate the straight" shoulders 285 formed on the ground section 273 of the terminal pin 270. They are not bent at right angles to the sheet stock, and accordingly, are commensurately less expensive to manufacture.
  • This configuration is specially suited for applications where space limitations prohibit the use of larger square" wells in the matrix block.
  • the rectangular configuration of the well orientates the shoulders 285 so as to properly position the pin 270 in radial relationship. Teeth 295 on the lower edges of the shoulders 285 once again are adapted to bite into the upper surface of the plate and achieve excellent electrical contact when the pin is drawn tightly against the plate by a locking nut (not shown) in the manner hereinbefore discussed.
  • FIGS. 12 and 13 illustrate at 340 a fourth form of ground connector assembly embodying features of the invention.
  • the ground connector assembly 340 includes a terminal pin 370 having a wire-wrap post 371 on one end and a ground section 373 on the opposite end. No contact is provided on the pin 370, opposite the ground section 373 from the wire-wrap post 371, because this type of pin is used solely as a wire connection ground in a plate-type terminal complex.
  • the ground section 373 of the assembly 340 has straight" shoulders 385 extending outwardly. In other words, they are not bent at right angles to the sheet stock. Teeth 395 on the lower edges of the shoulders 385 bite into the upper surface of the plate and achieve the excellent electrical contact hereinbefore discussed.
  • the terminal pin 470 includes a wire-wrap post 471 separated by the ground section 473 from a female tuning fork contact 474 at the opposite end.
  • the base of the tuning fork defines shoulders 485 which, in turn, have teeth 495 on their lower edges.
  • the teeth 495 are adapted to bite into the upper surfaces of the plate to achieve the aforementioned excellent electrical contact.
  • barbs 496 are designed to snap into corresponding recesses in the inner wall of the rectangular cavity 465 in the thermoplastic or thermoset material 421 and retain the insulator block on the plate.
  • threads are formed integrally with the terminal pin opposite shoulders which bite into the mounting plate. These threads, formed by coining or swaging, achieve excellent electrical connection, and thus grounding, through the nuts to the plate.
  • a ground connector assembly for making a ground connection between a conductor and a metallic terminal plate, compnsmg:
  • a terminal connector pin having a wire-wrap post at one end and a ground section adjacent said post
  • said ground section including a ground shank having a generally rectangular cross section and a largest transverse dimension corresponding substantially to the inside diameter of a generally cylindrical aperture through the terminal plate,
  • said ground section including ground contact support shoulders formed outwardly of said ground shank opposite the plate from said threaded section,
  • teeth means formed on the lower surface of said shoulders for biting into said plate and establishing excellent electrical contact with said plate
  • ground connector assembly of claim 11 further characterized in that:
  • said teeth means are formed by the lower surfaces of said shoulders inclined downwardly to sharp tips at their outer ends.
  • insulating block means mounted on said plate and having well means therein receiving said ground contact support shoulders portion of said ground section
  • a. outwardly extending barb means are formed on the radial periphery of said ground contact shoulders
  • said barb means sewing to retain said insulating block means against the metallic terminal plate when said insulating bloclt means is snapped over said shoulder and said barb means.
  • said ground contact support shoulders comprise portions of the flat sheet stoclt from which said ground section is formed bent at right angles to the flat sheet stock in opposite directions.
  • said portions bent at right angles to said flat sheet stock are defined at their upper and lower extremities by being sheared a short distance inwardly of said ground shank edges whereby said portions are more readily and compactly bent at said right angles.
  • said shoulders comprises an upper set of shoulders extending in one direction from said flat sheet stock and a lower set of shoulders extending in the opposite direction from said flat sheet stock.
  • ground connector assembly of claim 7 further characterized in that:
  • said upper set of shoulders extends in the opposite direction from the contact surface of a contact formed on the end of a terminal pin formed opposite said wire-wrap post,

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Multi-Conductor Connections (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US44191A 1970-06-08 1970-06-08 Ground connector Expired - Lifetime US3614706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4419170A 1970-06-08 1970-06-08

Publications (1)

Publication Number Publication Date
US3614706A true US3614706A (en) 1971-10-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US44191A Expired - Lifetime US3614706A (en) 1970-06-08 1970-06-08 Ground connector

Country Status (7)

Country Link
US (1) US3614706A (xx)
BE (1) BE768177A (xx)
CA (1) CA946951A (xx)
DE (1) DE2127919A1 (xx)
FR (1) FR2096019A5 (xx)
GB (1) GB1339161A (xx)
NL (1) NL7107822A (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905665A (en) * 1971-07-27 1975-09-16 Amp Inc Electrical contact structure and assembly method
US3963293A (en) * 1971-06-28 1976-06-15 Trw Inc. Electrical edge connector
US3998518A (en) * 1972-04-04 1976-12-21 Bunker Ramo Corporation Electrical connector having improved releasable contact construction
FR2522203A1 (fr) * 1982-02-24 1983-08-26 Sintra Alcatel Sa Traversee electrique de boitier de circuit hybride et connecteurs complementaires
US4534611A (en) * 1981-06-23 1985-08-13 Siemens Aktiengesellschaft Contact springs
US6320139B1 (en) 1998-11-12 2001-11-20 Rockwell Automation Technologies, Inc. Reflow selective shorting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909755A (en) * 1954-11-22 1959-10-20 Jackson Anton Dual contact receptacle for printed circuits
US3200366A (en) * 1963-07-17 1965-08-10 Itt Reusable peripheral seal joint
US3289148A (en) * 1964-07-29 1966-11-29 Litton Systems Inc Connectors
US3434091A (en) * 1967-07-20 1969-03-18 Malco Mfg Co Inc Connector
US3530422A (en) * 1968-03-25 1970-09-22 Elco Corp Connector and method for attaching same to printed circuit board

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909755A (en) * 1954-11-22 1959-10-20 Jackson Anton Dual contact receptacle for printed circuits
US3200366A (en) * 1963-07-17 1965-08-10 Itt Reusable peripheral seal joint
US3289148A (en) * 1964-07-29 1966-11-29 Litton Systems Inc Connectors
US3434091A (en) * 1967-07-20 1969-03-18 Malco Mfg Co Inc Connector
US3530422A (en) * 1968-03-25 1970-09-22 Elco Corp Connector and method for attaching same to printed circuit board

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963293A (en) * 1971-06-28 1976-06-15 Trw Inc. Electrical edge connector
US3905665A (en) * 1971-07-27 1975-09-16 Amp Inc Electrical contact structure and assembly method
US3998518A (en) * 1972-04-04 1976-12-21 Bunker Ramo Corporation Electrical connector having improved releasable contact construction
US4534611A (en) * 1981-06-23 1985-08-13 Siemens Aktiengesellschaft Contact springs
FR2522203A1 (fr) * 1982-02-24 1983-08-26 Sintra Alcatel Sa Traversee electrique de boitier de circuit hybride et connecteurs complementaires
EP0087159A1 (fr) * 1982-02-24 1983-08-31 Cimsa Sintra Traversée électrique de boîtier de circuit hybride et connecteurs complementaires
US4531791A (en) * 1982-02-24 1985-07-30 Sintra-Alcatel Feed-through for hybrid circuit box and matching connectors
US6320139B1 (en) 1998-11-12 2001-11-20 Rockwell Automation Technologies, Inc. Reflow selective shorting

Also Published As

Publication number Publication date
DE2127919A1 (de) 1971-12-16
BE768177A (fr) 1971-11-03
CA946951A (en) 1974-05-07
NL7107822A (xx) 1971-12-10
FR2096019A5 (xx) 1972-02-11
GB1339161A (en) 1973-11-28

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