US3076166A - Electrical connector for printed circuit cards - Google Patents

Electrical connector for printed circuit cards Download PDF

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Publication number
US3076166A
US3076166A US59668A US5966860A US3076166A US 3076166 A US3076166 A US 3076166A US 59668 A US59668 A US 59668A US 5966860 A US5966860 A US 5966860A US 3076166 A US3076166 A US 3076166A
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United States
Prior art keywords
cards
bag
printed circuit
slot
electrical connector
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Expired - Lifetime
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US59668A
Inventor
Raddin Franklin
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Monroe Calculating Machine Co
Original Assignee
Monroe Calculating Machine Co
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Filing date
Publication date
Priority claimed from US628034A external-priority patent/US2956258A/en
Application filed by Monroe Calculating Machine Co filed Critical Monroe Calculating Machine Co
Priority to US59668A priority Critical patent/US3076166A/en
Priority to US59537A priority patent/US3090026A/en
Application granted granted Critical
Publication of US3076166A publication Critical patent/US3076166A/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
    • H01R12/82—Coupling devices connected with low or zero insertion force
    • H01R12/85—Coupling devices connected with low or zero insertion force contact pressure producing means, contacts activated after insertion of printed circuits or like structures
    • H01R12/853—Fluid activated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/03—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations
    • H01R11/07—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the relationship between the connecting locations the connecting locations being of the same type but different sizes
    • 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
    • H01R13/193—Means for increasing contact pressure at the end of engagement of coupling part, e.g. zero insertion force or no friction

Definitions

  • the printed circuit cards normally include multi-contact plugs which enter into sockets in a chassis or inter-connection unit.
  • the making of soldered connections to the ends of the plug adds to the cost of construction and such plugs have a number of disadvantages as a means for making connections to printed circuit cards, especially when the cards are miniaturized. 1
  • the plugs require an appreciable mechanical force on each pin to insure a reliable contact resistant to corrosion, vibration, and shock. As many contacts are normally required, the force necessary for insertion and removal of a card is considerable. Equipments using printed circuit cards are normally com act so that it is frequently diflicult to apply an appreciable force to remove and insert the cards. v a
  • the plugs limit the degree ofminiaturization which can be obtained.
  • the card must be large enough to withstand the forces applied to it for insertion and removal.
  • the pin size and spacing necessary for the plug is another limiting factor on the size of the card.
  • the apparatus of the instant invention provides a means for making reliable connections directly to the printed terminals along the edges of printed circuit cards.
  • the spacing of the printed terminals may be the same as the spacing of other printed conductors. Substantially zero force is required to insert and remove the cards so that they need to be only strong enough to support the printed circuitry and other circuit components.
  • a fluid pres- I sure is applied uniformly along rows of mating contacts to hold them together with suflicient force to insure connections resistant to corrosion, vibration, and shock.
  • At least one of the cards or other member supporting sets of contacts is flexible and the fluid pressure means is CD111 formable in shapeso that a substantially uniform pressure will be applied to each pair of mating contacts despite small dimensional variations in the contacts or their supporting members. The fluid pressure is removed to allow insertion and removal with-out wear and undesira-ble mechanical stress.
  • An object of the invention is an improved means of making connections to printed circuit cards.
  • a further object of the invention is apparatus for making connections directly to printed terminals on printed circuit cards wherein a uniform contact pressure is maintained with each terminal.
  • a still further object of this invention is apparatus for 3,676,166 Patented Jan; 29, 163
  • PEG. 1 is a perspective view of one embodiment of the invention having a section cut away to show the internal structure.
  • FIG. 2 is an elevation view of a vertical section of the embodiment of FIG. 1 taken along the line a-a.
  • Notched member ,11 joins to bar 12 by screws (not shown) or by any other suitable means, so that the two form a vertical slot running longitudinally.
  • Printed circuit card 13a is inserted in the slot from the upper side and printed circuit card 13b from the lower side so that portions thereof overlap each other in the slot.
  • Member 11 is made of a rigid material and has a chamber hollowed out with an opening along the side of the slot. Fluid filled flexible bag 14 is mounted inside the chamber with a side adjacent to the slot. Screw 15 journeys through a threaded hole in one end of member 11 and extends inside the chamber. Plate 16 rotatably joins to the end of screw 15 inside the chamber.
  • Screw 15 When screw 15 is turned inwardly, it forces plate 16 against fluid filled bag 14.
  • the fluid inside bag 14 is substantially incompressible so that the longitudinal compression causes the bag 14 to expand laterally into the side of the slot and to press cards 13a and 1315 together against bar 12.
  • Bag 14 is flexible so that it conforms to the shape of printed circuit card 13b allowing pressure to be applied uniformly along the portion adjacent to the chamber opening. As the area of plate 16 is smaller than that of the portions of cards 13a and 13b in the slot, the force exerted on the cards 13a and 13b is considerably greater than on plate 16. Screw 15 provides a further mechanical advantage for manualradjus-tment.
  • Printed circuit cards 13a and 1312 each have a plurality of printed conductors 17 extending along the overlapping sections of their adjoining sides.
  • Printed conductors 17 on cards 13a and 13b are in mating relation so that each conductor 17 on card 13a makes contact with a corresponding conductor 17 on card 13b when cards 13a and 13b are pressed together.
  • Cards 13a and 13b are sufliciently flexible to bend under the pressure exerted through bag 14.
  • cards 13a and 1312 makes it possible to hold each mating pair of conductors 17 together with substantially the same pressure despite small dimensional irregularities in thickness. Since no close tolerances are required, cards 13a and 13b may be manufactured by low cost methods. suitable type and have any arrangement of printed circuitry and other components.
  • An electrical connector comprising a housing having a substantially linear slot, a closed flexible bag filled with a substantially incompressible fluid mounted in said housing with a first wall thereof coextensive with one side of said slot, two conductor carrying card members of insulating material having conducting material selectively printed thereon, at least one of said cards being flexible, and means for exerting a force on said bag whereby said abutting conductors are pressed together by movement of said first wall'of said bag.
  • An electrical connector comprising a housing having a slot, a closed flexible bag filled with a substantially incompresible fluid mounted in said housing with at least one wall of the bag coextensive with one side of said slot, at least two conductor carrying card members of insulating material having conducting material selectively placed theron and adapted to fit in said slot with conductors thereon in abutting relation, and movable plate means for exerting a force on said bag whereby said abutting conductors arepressed together under uniform pressure by expanding movement of the wall of said bag.
  • An electrical connector comprising a housing having a slot, a closed chamber mounted in said housing having a flexible wall substantially coextensive with one side of said slot and filled with a substantially incompressible fluid, means for exerting a force on said chamber to move the said flexible wall with respect to said slot, two conductor carrying members adapted to fit in said slot with the conductors abutting wherein said abutting conductors are pressed together by movement of said flexible wall into said slot, said abutting sections comprising electrical conductors mounted in mating relation on the overlapping sections of said members.

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  • Coupling Device And Connection With Printed Circuit (AREA)

Description

Jan. 29, 1963 FIG. I
FIG. 2'
INVENTOR. FRANKLIN RAD D! N ATTORNEY F. RADDIN 3,076,166
United States Patent Machine Company, Orange, NJ., a corporation of Delaware Original application Dec. 13, 1956, Ser. No. 628,034, now Patent No. 2,956,258, datedOct. 11, 1960. Divided and this application Sept. 30, 1960, Ser. No. 59,668 3 Claims. (Cl. 339-17) This invention, which is a division of copending patent application 628,034, filed December 13, 1956, now Patent 2,956,258, dated October. 11, 1960, by Franklin Raddin, relates to electrical connectors for printed circuit cards or the like.
It is well known that prin'tedcircuit cards provide a number of advantages when used in electronic apparatus. Such cards are especially suited to mass production and make possible a reduction in the size of electronic apparatus. They also provide a modular type of construction in electronic equipments that simplifies the maintenance problem by permitting a quick substitution of small units which become defective.
To provide for easy replacement, the printed circuit cards normally include multi-contact plugs which enter into sockets in a chassis or inter-connection unit. The making of soldered connections to the ends of the plug adds to the cost of construction and such plugs have a number of disadvantages as a means for making connections to printed circuit cards, especially when the cards are miniaturized. 1
The plugs require an appreciable mechanical force on each pin to insure a reliable contact resistant to corrosion, vibration, and shock. As many contacts are normally required, the force necessary for insertion and removal of a card is considerable. Equipments using printed circuit cards are normally com act so that it is frequently diflicult to apply an appreciable force to remove and insert the cards. v a
In any event, the plugs limit the degree ofminiaturization which can be obtained. The card must be large enough to withstand the forces applied to it for insertion and removal. The pin size and spacing necessary for the plug is another limiting factor on the size of the card.
The apparatus of the instant invention provides a means for making reliable connections directly to the printed terminals along the edges of printed circuit cards. The spacing of the printed terminals may be the same as the spacing of other printed conductors. Substantially zero force is required to insert and remove the cards so that they need to be only strong enough to support the printed circuitry and other circuit components.
In the apparatus of the instant invention, a fluid pres- I sure is applied uniformly along rows of mating contacts to hold them together with suflicient force to insure connections resistant to corrosion, vibration, and shock. At least one of the cards or other member supporting sets of contacts is flexible and the fluid pressure means is CD111 formable in shapeso that a substantially uniform pressure will be applied to each pair of mating contacts despite small dimensional variations in the contacts or their supporting members. The fluid pressure is removed to allow insertion and removal with-out wear and undesira-ble mechanical stress.
An object of the invention is an improved means of making connections to printed circuit cards.
A further object of the invention is apparatus for making connections directly to printed terminals on printed circuit cards wherein a uniform contact pressure is maintained with each terminal.
A still further object of this invention is apparatus for 3,676,166 Patented Jan; 29, 163
. making connections to printed circuit cards from which the cards may be inserted and removed with the application of substantially zero force.
Other objects and advantages together with 'a fuller understanding of the invention, will be had by referring to the following description and claims taken in conjunction with the accompanying drawings in which:
PEG. 1 is a perspective view of one embodiment of the invention having a section cut away to show the internal structure.
FIG. 2 is an elevation view of a vertical section of the embodiment of FIG. 1 taken along the line a-a.
' Notched member ,11 joins to bar 12 by screws (not shown) or by any other suitable means, so that the two form a vertical slot running longitudinally. Printed circuit card 13a is inserted in the slot from the upper side and printed circuit card 13b from the lower side so that portions thereof overlap each other in the slot. Member 11 is made of a rigid material and has a chamber hollowed out with an opening along the side of the slot. Fluid filled flexible bag 14 is mounted inside the chamber with a side adjacent to the slot. Screw 15 journeys through a threaded hole in one end of member 11 and extends inside the chamber. Plate 16 rotatably joins to the end of screw 15 inside the chamber.
When screw 15 is turned inwardly, it forces plate 16 against fluid filled bag 14. The fluid inside bag 14 is substantially incompressible so that the longitudinal compression causes the bag 14 to expand laterally into the side of the slot and to press cards 13a and 1315 together against bar 12. Bag 14 is flexible so that it conforms to the shape of printed circuit card 13b allowing pressure to be applied uniformly along the portion adjacent to the chamber opening. As the area of plate 16 is smaller than that of the portions of cards 13a and 13b in the slot, the force exerted on the cards 13a and 13b is considerably greater than on plate 16. Screw 15 provides a further mechanical advantage for manualradjus-tment.
Printed circuit cards 13a and 1312 each have a plurality of printed conductors 17 extending along the overlapping sections of their adjoining sides. Printed conductors 17 on cards 13a and 13b are in mating relation so that each conductor 17 on card 13a makes contact with a corresponding conductor 17 on card 13b when cards 13a and 13b are pressed together. Cards 13a and 13b are sufliciently flexible to bend under the pressure exerted through bag 14.
This flexibility of cards 13a and 1312 makes it possible to hold each mating pair of conductors 17 together with substantially the same pressure despite small dimensional irregularities in thickness. Since no close tolerances are required, cards 13a and 13b may be manufactured by low cost methods. suitable type and have any arrangement of printed circuitry and other components.
It will further be recognized that various other arrangements could also be used for obtaining fluid pressure in the invention other than that shown. For example, a cam type mechanism positioned by alever could be used instead of a screw to move a plate against the bag. Such a mechanism would permit quick application and removal of pressure but would require an additional adjusting means to obtain the desired pressure in the event of changes in dimensions of the chamber in whichthe bag is located or of the cards and connectors use While the invention has been described with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example, and that numerous changes in the details of construction wherein a combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.
Cards 13a and 13b maybe of any What is claimed is:
1. An electrical connector comprising a housing having a substantially linear slot, a closed flexible bag filled with a substantially incompressible fluid mounted in said housing with a first wall thereof coextensive with one side of said slot, two conductor carrying card members of insulating material having conducting material selectively printed thereon, at least one of said cards being flexible, and means for exerting a force on said bag whereby said abutting conductors are pressed together by movement of said first wall'of said bag.
2. An electrical connector comprising a housing having a slot, a closed flexible bag filled with a substantially incompresible fluid mounted in said housing with at least one wall of the bag coextensive with one side of said slot, at least two conductor carrying card members of insulating material having conducting material selectively placed theron and adapted to fit in said slot with conductors thereon in abutting relation, and movable plate means for exerting a force on said bag whereby said abutting conductors arepressed together under uniform pressure by expanding movement of the wall of said bag.
3. An electrical connector comprising a housing having a slot, a closed chamber mounted in said housing having a flexible wall substantially coextensive with one side of said slot and filled with a substantially incompressible fluid, means for exerting a force on said chamber to move the said flexible wall with respect to said slot, two conductor carrying members adapted to fit in said slot with the conductors abutting wherein said abutting conductors are pressed together by movement of said flexible wall into said slot, said abutting sections comprising electrical conductors mounted in mating relation on the overlapping sections of said members.
References Cited in the file of this patent UNITED STATES PATENTS

Claims (1)

1. AN ELECTRICAL CONNECTOR COMPRISING A HOUSING HAVING A SUBSTANTIALLY LINEAR SLOT, A CLOSED FLEXIBLE BAG FILLED WITH A SUBSTANTIALLY INCOMPRESSIBLE FLUID MOUNTED IN SAID HOUSING WITH A FIRST WALL THEREOF COEXTENSIVE WITH ONE SIDE OF SAID SLOT, TWO CONDUCTOR CARRYING CARD MEMBERS OF INSULATING MATERIAL HAVING CONDUCTING MATERIAL SELECTIVELY PRINTED THEREON, AT LEAST ONE OF SAID CARDS BEING FLEXIBLE, AND MEANS FOR EXERTING A FORCE ON SAID BAG WHEREBY SAID ABUTTING CONDUCTORS ARE PRESSED TOGETHER BY MOVEMENT OF SAID FIRST WALL OF SAID BAG.
US59668A 1956-12-13 1960-09-30 Electrical connector for printed circuit cards Expired - Lifetime US3076166A (en)

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Application Number Priority Date Filing Date Title
US59668A US3076166A (en) 1956-12-13 1960-09-30 Electrical connector for printed circuit cards
US59537A US3090026A (en) 1956-12-13 1960-09-30 Electrical connectors

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Application Number Priority Date Filing Date Title
US628034A US2956258A (en) 1956-12-13 1956-12-13 Electrical connectors
US59668A US3076166A (en) 1956-12-13 1960-09-30 Electrical connector for printed circuit cards
US59537A US3090026A (en) 1956-12-13 1960-09-30 Electrical connectors

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314040A (en) * 1965-01-15 1967-04-11 United Carr Inc Electrical connector
US3366916A (en) * 1966-07-15 1968-01-30 Ibm Connector with fluid pressure relief devices
US3399372A (en) * 1966-04-15 1968-08-27 Ibm High density connector package
US3594707A (en) * 1969-10-20 1971-07-20 William Donald Peterson Circuit board with fluid pressurized insert strip
US3825878A (en) * 1973-09-10 1974-07-23 Motorola Inc Flexible flat cable system
US4966563A (en) * 1989-04-11 1990-10-30 Rogers Corporation Bus bar tab connector
US4968265A (en) * 1988-08-01 1990-11-06 Middleburg Corporation Fluidly actuated electrical connector
US5071357A (en) * 1990-04-18 1991-12-10 International Business Machines Corporation Fluid pressure actuated electrical connector
US5102343A (en) * 1991-02-22 1992-04-07 International Business Machines Corporation Fluid pressure actuated electrical connector
US5160269A (en) * 1991-12-19 1992-11-03 Precision Interconnect Corporation Hydrostatic connector for flex circuits
US5197890A (en) * 1992-01-10 1993-03-30 Gte Products Corporation Hydrodynamic electrical connector
US5222668A (en) * 1991-04-03 1993-06-29 International Business Machines Corporation Fluid actuated connector
US20120114286A1 (en) * 2010-11-04 2012-05-10 Tyco Electronics Corporation Connector assemblies having mating sides moved by fluidic coupling mechanisms

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH509724A (en) * 1969-08-07 1971-06-30 Burndy Corp Device for electrical connection between a conductor of a flat printed circuit and a rectilinear metal conductor perpendicular to the plane of the printed circuit
US4850889A (en) * 1988-06-06 1989-07-25 Lasota Laurence Serial electrical connector
US5002496A (en) * 1989-06-29 1991-03-26 Middleburg Corporation Cam actuated electrical connector
US5181853A (en) * 1990-04-18 1993-01-26 International Business Machines Corporation Fluid pressure actuated electrical connector
TWM267625U (en) * 2004-09-15 2005-06-11 Shin-Feng Jian Holding apparatus of pneumatic thin-film test

Citations (9)

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Publication number Priority date Publication date Assignee Title
US2011389A (en) * 1930-06-02 1935-08-13 Felten & Guilleaume Carlswerk Oil-filled cable installation
US2016247A (en) * 1930-05-30 1935-10-01 Gen Cable Corp Electrical installation
US2286812A (en) * 1938-08-09 1942-06-16 Lincoln M Keefe Connecting device for tabulating machines
US2456902A (en) * 1945-03-17 1948-12-21 Westinghouse Electric Corp Contact and shorting mechanism
GB700490A (en) * 1949-05-11 1953-12-02 Harold Vezey Strong Improvements in and relating to the making of connection between multicore electric cables
US2730683A (en) * 1954-09-29 1956-01-10 Rca Corp Sliding connector
US2757225A (en) * 1952-12-24 1956-07-31 Ace Engineering & Machine Co I Doors for radio shielded enclosures
US2827312A (en) * 1956-04-26 1958-03-18 Sidney H Spencer Pneumatic coupler having radially moveable locking means
US2852463A (en) * 1956-11-14 1958-09-16 Intercompany Corp Plate clamping mechanism for electrolytic treating apparatus

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Publication number Priority date Publication date Assignee Title
US2685071A (en) * 1951-03-26 1954-07-27 Collins Radio Co Expansible conductive seal for resonant cavities
US2832942A (en) * 1955-07-08 1958-04-29 Harry H French Electrical connector for printed cards

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2016247A (en) * 1930-05-30 1935-10-01 Gen Cable Corp Electrical installation
US2011389A (en) * 1930-06-02 1935-08-13 Felten & Guilleaume Carlswerk Oil-filled cable installation
US2286812A (en) * 1938-08-09 1942-06-16 Lincoln M Keefe Connecting device for tabulating machines
US2456902A (en) * 1945-03-17 1948-12-21 Westinghouse Electric Corp Contact and shorting mechanism
GB700490A (en) * 1949-05-11 1953-12-02 Harold Vezey Strong Improvements in and relating to the making of connection between multicore electric cables
US2757225A (en) * 1952-12-24 1956-07-31 Ace Engineering & Machine Co I Doors for radio shielded enclosures
US2730683A (en) * 1954-09-29 1956-01-10 Rca Corp Sliding connector
US2827312A (en) * 1956-04-26 1958-03-18 Sidney H Spencer Pneumatic coupler having radially moveable locking means
US2852463A (en) * 1956-11-14 1958-09-16 Intercompany Corp Plate clamping mechanism for electrolytic treating apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314040A (en) * 1965-01-15 1967-04-11 United Carr Inc Electrical connector
US3399372A (en) * 1966-04-15 1968-08-27 Ibm High density connector package
US3366916A (en) * 1966-07-15 1968-01-30 Ibm Connector with fluid pressure relief devices
US3594707A (en) * 1969-10-20 1971-07-20 William Donald Peterson Circuit board with fluid pressurized insert strip
US3825878A (en) * 1973-09-10 1974-07-23 Motorola Inc Flexible flat cable system
US4968265A (en) * 1988-08-01 1990-11-06 Middleburg Corporation Fluidly actuated electrical connector
US4966563A (en) * 1989-04-11 1990-10-30 Rogers Corporation Bus bar tab connector
US5071357A (en) * 1990-04-18 1991-12-10 International Business Machines Corporation Fluid pressure actuated electrical connector
US5102343A (en) * 1991-02-22 1992-04-07 International Business Machines Corporation Fluid pressure actuated electrical connector
US5222668A (en) * 1991-04-03 1993-06-29 International Business Machines Corporation Fluid actuated connector
US5160269A (en) * 1991-12-19 1992-11-03 Precision Interconnect Corporation Hydrostatic connector for flex circuits
US5197890A (en) * 1992-01-10 1993-03-30 Gte Products Corporation Hydrodynamic electrical connector
US20120114286A1 (en) * 2010-11-04 2012-05-10 Tyco Electronics Corporation Connector assemblies having mating sides moved by fluidic coupling mechanisms
US8342866B2 (en) * 2010-11-04 2013-01-01 Tyco Electronics Corporation Connector assemblies having mating sides moved by fluidic coupling mechanisms

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