Abstract: A cable connector includes cables, and jacks attached to ends of the cables. The jacks have contacts connected to the cables. The contacts extend in a first direction substantially perpendicular to a second direction in which the cables extend from the jacks.

Abstract: A press-in contact has a press-fitting portion which is press-fitted in a cylindrical through-hole of a printed circuit board, thereby fixing the press-in contact to the circuit board. The cross-section of the press-fitting portion of the press-in contact includes a U-shaped inner edge and an outer periphery having two arc parts and a straight part therebetween. The circular part of the U-shaped inner edge at its bottom and the two arc parts of the outer periphery are in eccentric relation of shifted centers. The thickness of the arc parts is progressively thinner toward the open ends of the U-shaped inner edge, and a circumferential length of the arc parts of the outer periphery contacting the through-hole of the printed circuit board is as long as possible. With the press-in contact thus constructed, no whitening occurs in the proximity of the through-hole of the printed circuit board even if the holding force for the contact is more than 5 kg.

Abstract: A novel conductive contact comprises a dual beam spring (308, 310) which forms a "C" shaped spring and which is used to electrically mate to a contact on a printed circuit board. The open end of the "C" spring preferably fits over a plastic rib (404) in a housing for support. A surface mount contact (504) on the PCB has formed wings which fit into a rectangular slot in the PCB. To make electrical connection, the board is placed over the "C" spring. The "C" spring and plastic support protrude through the rectangular slot in the PCB. The conductive contact is preferably formed from a single piece of metal.

Abstract: A circuit board has holes extending therethrough, and a solder layer disposed on a first side of the board. Terminals have been pushed through respective holes and into contact with the solder layer. The terminals have been welded to the first side of the circuit board in a fluxless manner by an irradiated energy beam.

Abstract: A terminal socket assembly is adapted for mounting on a printed circuit board and includes a conductive terminal socket having a barrel portion insertable axially into a hole in the printed circuit board, with radially outwardly projecting wing portions for soldering to solder pads on the circuit board. A terminal-receiving dielectric housing mounts the terminal socket therewithin. The housing has walls which extend circumferentially about portions of the barrel portion of the terminal socket to prevent solder from wicking along exposed areas of the terminal and interfering with mating. The anti-solder wicking design allows a connector or component to be surface mounted directly on the surface of a circuit board to maximize the density of the entire assembly and the device in which it is used.

Abstract: A contacting structure with respect to a spherical bump in which the spherical bump is to be contacted with a contact pin, the contact pin includes a contacting portion supported by a resilient support element, and the contacting portion is arranged in opposite relation to that part of a spherical surface of the spherical bump other than a lower-most point thereof. The contacting portion has a projection capable of pressing into the spherical surface of the spherical bump, and also has a pressure receiving surface for setting an amount by which the projection presses into the spherical surface.

Abstract: Microelectronic contacts, such as flexible, tab-like, cantilever contacts, are provided with asperities disposed in a regular pattern. Each asperity has a sharp feature at its tip remote from the surface of the contact. As mating microelectronic elements are engaged with the contacts, a wiping action causes the sharp features of the asperities to scrape the mating element, so as to provide effective electrical interconnection and, optionally, effective metallurgical bonding between the contact and the mating element upon activation of a bonding material.

Abstract: A multilayer printed circuit board comprising conducting layers of a first material and conducting layers of a second material includes noncorrosive low resistance electrical contacts between conducting layers of the first and second material. The noncorrosive low resistance contacts allow the use of light weight conducting materials for particular layers of the circuit board to produce a light weight multilayer circuit board.

Abstract: An electrical device is provided having a conductive coating or layer chemically grafted to a support substrate to produce a durable, conductive surface permanently attached to the underlying substrate material. The grafted layer can be embodied in an electrical contact, and can also be embodied as electrical traces and contact areas of circuit boards and electrical and electronic devices and components. In another embodiment, the grafted layer can be provided in an RFI/EMI shield or ground plane.

Abstract: An electrical pin contact for mounting on a printed circuit board to provide an electrical interconnection to the printed circuit board. The contact includes an elongated, conductive pin, and a base attached to one end of the pin. The base has a triangular cross-section with vertices that engage a plate-through hole to support the contact in the plated-through hole during a soldering process. The contact may include a flange or stops to support the contact on a printed circuit board. The contact may also include a tail extending from the base opposite the pin.

Abstract: A flexible circuit construction allows solder balls to be mass reflow attached to the ground plane of a double-sided flexible circuit by providing a first via which is separate from the remainder of the ground plane, but which is electrically connected to the ground plane through a second via at a distance from the first via by a circuit trace on the side of the flexible circuit opposite the ground plane.

Abstract: A compliant contact for insertion in a plated hole in a circuit board is machined from a single piece of metal with a shank at one end, which projects through the hole, and a socket at its opposite end, which can be crimped about a conductor inserted in it. Rearwardly of the shank, the contact has an entry region with two convex surfaces tapering away from one another rearwardly to a compliant region. The compliant region has two flat sides and a slot extending between the sides, which divides the region into two resilient blades, each of which has a flat, parallel outer surface. The flat outer surfaces are divided from the flat sides by turned edge portions formed as a part of a common surface of circular section.

Abstract: A new printed wiring board connection apparatus is provided. The apparatus comprises a spacer made of synthetic resin insulation material with pin support spaces bored within it, connection pins of elastic wire each having at least one bent portion with an end thereof being bent outwardly are inserted into the pin support spaces of the spacer such that they are resiliently secured therewithin with the aid of pin engagement holes formed in the pin support spaces which receive the bent ends of the connection pins while the bent portions and opposite ends thereto of the connection pins protrude from the spacer. The aforesaid apparatus is used to connect two printed wiring boards in such a way that protruding portions of the connection pins are inserted into throughholes of the printed wiring boards.

Abstract: The invention is directed to a printed circuit board arrangement for plug-type connections composed of a blade connector and spring clip, whereby the individual contact passages are surrounded by electrically conductive shield plates that are connected to contactings carrying shield potential that are attached both at the backplane side as well as at the assembly side, and whereby both the contact blades and contact springs as well as the contactings are contacted and secured with press-in technique in the printed circuit boards fashioned as multi-layer multilayers. In order to create an adequate interconnect lead-through width between the contactings, the shield potential in the printed circuit board arrangement of the invention is conducted in a separate shield printed circuit board (3) that is electrically separated from the multilayer (1) by an insulating foil (2).

Abstract: An electrical contact is provided for press-fit insertion into a circuit board, which provides a large retention force (resistance to pullout) even for very small circuit board holes. A compliant section (14, FIG. 1) of the contact, which lies in the hole, is of the eye-of-the-needle type which includes a pair of largely parallel beams (24, 26) with opposite ends that merge and with middle portions (30, 32) that are laterally spaced. Additional holding power is achieved by providing a protuberance (40, 42) on a middle portion of each beam, which projects towards the other beam. When the contact is press-fit in a circuit board hole, at least the tips of the protuberances are crushed, or plastically deformed. The protuberances preferably have sides that are tapered, and the average axial length (H, FIG. 4) of each protuberance is preferably between onethird and three times its thickness (T).

Abstract: The present invention is a metal blade formed of folded strips (13, 14) for an assembly of electrically conductive contacts in a printed circuit board, adapted to access line current, such as in a 120 V AC outlet. The assembly may be used in various ways such as an intermediate in the making of molded plugs. The blades are adapted for fabrication in a progressive stamping operation and for automation in use from a roll or hopper. A blade of the present invention has resilient tabs (21) and spaced away sharp edge fingers (16). The tabs are formed to snap engage in a tapered slot (26) in a printed circuit board with the sharp edges (17) of the fingers (16) in electrical contact with a printed circuit and to hold its engagement even before being soldered. Each of the folded strips includes pad (12) and a section of a bubble (15) formed to prevent flashing of plastic during a molding process.

Abstract: An electrical connection pin blank having at least one compliant section is affixed to a first circuit board by compressive deformation in such a way that the compliant section of the pin blank projects outwardly from the surface of the first circuit board. The end of the pin projecting from the first circuit board is then inserted into a corresponding opening in a second circuit board and the two boards brought together until the second circuit board is firmly affixed to the complaint section of the pin by compliant pin connection.

Abstract: A miniature socket contact (10, FIG. 1) is described which fits within the thickness of a device such as PC board plated hole (20), which is firmly retained within the hole, without damage to the hole plating during removal, and wherein each pin-contacting beam (70, 72) has two points of contact with an inserted contact pin (14). The contact is formed of sheet metal and has an upper retention portion (30) forming retention tabs (42-46), with each tab having an inner part (50) extending radially inwardly, an outer part (56) extending radially outwardly with a tip (60) that presses against the hole walls, and a bent middle (54) that guides an inserted pin and is preferably deflected outwardly by the inserted pin to press the tab tip firmly against the hole walls. The contact has a lower contacting portion (32) forming a pair of downwardly converging beams (70, 72) whose lower ends engage the inserted pin. As seen in a view (FIG.

Abstract: A probe pin for inspection composing a unit to inspect a printed circuit is formed with a conductive metallic tube into which a plunger is inserted with a spring. The plunger is slidably projected from the top end of the conductive metallic tube and a plurality of hollow salients are formed symmetrically on outer surface of the conductive metallic tube to extend in the axial direction so that the conductive metallic tube is easily pushed into a plurality of holding openings formed on an insulated holding plate. Thus, the probe pins come in contact with each contact on the printed circuit without coming off, slanting or bending of the conductive metallic tube or further without breaking the salients or without deviating the installation of the conductive metallic tube from the holding openings on the holding plate, and a slip-on socket is provided to mate with the probe pin for inspection.

Abstract: A module substrate consists of a substrate mounting electronic parts on one surface thereof, a conductor for electrically conducting the electronic parts mounted on the substrate to the other surface of the substrate, a conductive solder for attaching the conductor to a base substrate movably contacting the other surface of the substrate to electrically connect the electronic parts with the base substrate, and a deformable bushing for holding the conductor to maintain the attachment of the conductor to the base substrate regardless of whether the base substrate is moved.

Abstract: An insert mounting and a method for inserting and mounting components in holes of printed wiring boards, in particular for plug connectors or parts thereof, include connection pegs of two components being inserted in a T-shaped basic configuration into a hole in a printed wiring board from opposite sides of the printed wiring board, for fastening the two components in the printed wiring board hole. The connection pegs have a rectangular basic cross sectional shape. One of the connection pegs forms a crossbar of the T-shaped basic configuration and is introduced first into the printed wiring board hole. At least one of the connection pegs is elastically deformable for forming an elastic insertion zone of the connection pegs of the two components in a state in which the connection pegs are disposed in the printed wiring board hole.

Abstract: An electrical contact pin is disclosed for mounting in a through hole in a printed circuit board. The contact pin has a pointed part and a longitudinal contact part which interacts with the hole when mounted therein. The cross-section of the contact part is generally H-shaped formed of four fins which project parallel to the longitudinal axis of the pin and are connected over the longitudinal distance of the contact part by a central cross rib and define two longitudinal recesses situated on either side of the cross rib. Each longitudinal recess has an essentially V-shaped floor. The contact part is made slightly curved at its short sides, each of which comprises two fins merging into each other over the entire longitudinal distance. The fins are also curved more inwardly by their fin ends starting from the pointed part over an appreciable part of the longitudinal distance. The curvature of the fin ends first gradually increasing starting at the pointed part, and then decreasing.

Abstract: An arrangement for vertically mounting a semiconductor device to a substrate, e.g., a printed circuit board (PCB), in which a plurality of sequentially arranged external leads of the semiconductor device include at least three different sets of non-consecutive ones of the external leads which have laterally outwardly extending foot portions lying in respective, vertically spaced-apart planes, and in which the foot portions of first and second ones of the sets of non-consecutive external leads are respectively secured to respective first and second steps formed in one of a plurality of walls defining a cavity in the PCB, and a third set of the non-consecutive external leads are secured to a portion of a major surface of the PCB adjacent the cavity.

Abstract: An electrically conductive stripline (16) is formed on a thermally fusible sheet (10), with a portion (16a) of the stripline (16) extending adjacent to an edge (10a) of the sheet (10). A cavity (18) is formed in another thermally fusible sheet (12) having an end (18) at an edge (12a) thereof. The sheets (10,12) are laminated together with their edges (10a,12a) aligned, and the cavity (18) aligned with and facing the edge portion (16a) of the stripline (16). A retaining pin (20) may be temporarily inserted into the cavity (18) to prevent collapse thereof during the lamination step. The laminated sheets (10,12) are heated to thermally fuse them together. An electrically conductive pin (28) is partially inserted into the cavity (18) and ohmically bonded to the stripline (18) to provide an external connection.

Abstract: An electrical terminal (10) including a contact section (14) extending from a body section (12), and a pin section (16) extending from the body section to be inserted into a circuit board through hole (20). The pin section (16) is defined by a pair of spaced apart opposing legs (30) each having a compliant portion (42) defined by a pair of arcuate beams (48) spaced apart by a slot (50), the arcuate beam pair at outer edges (54) being larger in dimension than the through hole diameter. Insertion compresses the arcuate beams (48) of each pair together generating force in a first direction, and compresses the legs toward each other generating force in an orthogonal direction.

Abstract: When an external connection I/O pin which is formed on a multilayer ceramic circuit board is broken off together with a part of a ceramic substrate, an electrically conductive adhesive is filled in the area where the I/O pin broke and was removed, and together with standing a new pin in this place and connecting it electrically, the new pin is bridged and secured to the surrounding I/O pins using a fixation plate. In so doing, it is possible to restore the broken I/O pin to have the same electrical and mechanical characteristics as before.

Abstract: A socket for receiving a lead of an electronic component comprises a socket body having a tubular body portion and a lead gripping portion. The tubular body portion defines a reception zone for receiving the lead of the electronic component along a lead receiving axis. The lead gripping portion has angularly spaced apart spring fingers which are separated by gaps. The spring fingers extend from the tubular body portion and converge inwardly toward the lead receiving axis to define a constriction for frictionally gripping the lead. Segments of the tubular body portion which are adjacent to and axially aligned with the gaps between the spring fingers are bent outwardly. The outwardly bent segments define retention barbs which are engageable with a wall of the hole in the substrate to retain the socket in the substrate.

Abstract: A contact pin having a thin wall construction that makes good electrical connection with an IC socket without insulation due to oxide film forming on the surface of the lead and which does not easily break due to plastic deformation. An IC socket has a feature to prevent an IC device position from deviating and deforming its leads which can automatically position the IC device for secure contact with contact pins of an IC frame having leads by limited positioning of the IC device on a stage.

Abstract: A boardlock is provided for holding down the housing of an electrical connector to a circuit board, which can be constructed at low cost and which assures good electrical and mechanical connection between the connector housing and circuit board. The boardlock is designed to be pushed downwardly through a cylindrical hole in a connector flange and through a larger diameter cylindrical hole drilled into the circuit board. The boardlock is formed from a piece of sheet metal which is bent to form largely tubular upper and lower portions (40, 42, FIG. 2 ) received respectively in the flange hole and in the larger diameter board hole, with largely vertical edges of the bent sheet metal engaging the walls of the hole.

Abstract: The present integrated circuit package provides both a high density of conductor poles, and reduced crosstalk noise between the conductor poles. The conductor poles are arranged within a selected number of holes in an insulating substrate. Metallized layers for shielding the conductor poles are provided on the walls of the holes in the insulating substrate which receive the conductor poles. In addition, an insulating layer is provided on the inner circumferences of the metallized layers, which insulating layers directly surround the conductor poles to preclude direct contact between the conductor poles and the metallized layers.

Abstract: A relatively compact profile hard disc drive package is disclosed in which an clean room zone internal to the drive casing may be sealed despite the presence of a linking connector extending from the package. A cutout is provided in the casing and a connector body is fitted into the cutout so that the connector does not project beyond the surface of the casing. The connector has pins that are mated to a receptacle connector located within the casing and other pins that are mated to a receptacle connector on the exterior of the casing. The cutout is sealed by a sealant that is received between projections extending from the body of the connector.

Abstract: A press-fit connector has an insulative body carrying a series of right-angle pins one branch of which can be force-fitted into a through-plated hole in a printed circuit. The insulative body comprises an angle-bracket having a mounting flange whose outside surface is adapted to bear against the board and a pressure block with bearing surfaces adapted to bear against the pins in order to apply to them a force which forces them into the through-plated holes and other bearing surfaces adapted to bear against the mounting flange. The geometry of the assembly is such that when the first bearing surfaces bear without external loading on the pins there remains a clearance between the second bearing surfaces and the mounting flange which is greater than the permanent deformation of the pins and the insulative body after the pins are forced in and the external loading is removed, so that the angle-bracket is held perfectly against the board.

Abstract: A connector including an insulating main body through which numerous holes are formed in three arrays, the main body having numerous contactor pins inserted through the holes. The contactor pins are either first cranked pins whose folded portions are relatively long or second cranked pins whose folded portions are relatively short. In the first and third arrays, the first and second pins are alternately arranged, and all the pins in each of these arrays lie on the side of each array opposite the second array. The second array includes only the second pins and they are located in the second array arranged so that the folded portions of the pins alternately lie at the side of the first and third arrays. Even if the pitch of the holes of each array is reduced, an array of rectilinear portions of the second pins of increased pitch can be formed on both sides of the second array. The connector can be used with a socket having a standard contactor member when it is used in a back harness arrangement.

Abstract: A press-in type fastener for mounting circuit board components or circuit boards to a chassis grips a through-hole in the circuit board by radial expansion of the shank. The fastener has a head and a shank with smooth parallel sides and a length substantially equivalent to, but greater than the thickness of the circuit board. The fastener includes a through-bore which is tapered in the area of the shank. After being loosely inserted into a pre-drilled circuit board mounting hole, the fastener is pressed between a punch and an opposing anvil which expands the fastener shank due to the axial compression of the fastener. The anvil has a substantially planar face which abuts the underside of the circuit board and, therefore, no part of the fastener protrudes through the opposite side of the board of the installation. The fastener may be headed and include teeth which extend axially from the underside of the fastener head for gripping the top side of the circuit board to provide torque resistance.

Abstract: An electrical connector (1), comprising: an insulative housing (2), a board mount (7) comprising, a post (19) to interfit with an aperture (10) of a circuit board (8), a first flange (25) to engage the circuit board (8), and a second flange (26) extending over an axis of the post (19) to receive an insertion force for inserting the post (19) into the aperture (10).

Abstract: An eyelet (64) for securing a first member (22) to a second member (12) through aligned apertures (28,30) includes a tubular shank portion (66), an inverted portion (68) at a first end of the shank portion and a generally cup-shaped portion (70) at a second end of the shank portion remote from the first end. The cup-shaped portion (70) remains outside the apertures (28,30) when the eyelet (64) is inserted therethrough and has its sidewall (76) formed with an interference portion. A tool (94) for use with the eyelet includes a plunger (82) surrounded by and slidably received in a collet (84) which is longitudinally divided into a plurality of segments. At the end of each of the collet segments there is a grip head (96) having an outer surface shaped complemental to the inner surface of the sidewall (76) of the cup-shaped portion of the eyelet.

Abstract: A press-fit contact is disclosed for insertion into a plated-through hole in a printed circuit board. The press-fit contact is rotationally symmetric (manufactured on a lathe). In order to secure a uniform contact pressure for the whole contact region, the press-in portion of the contact is formed in the shape of a convex barrel and includes an axially extending cylindrical cavity. The barrel-shaped walls are provided with longitudinal slots extending parallel to the axis of the contact. The slots do not extend up to the lower end of the contact defining resilient beams having their ends joined by a rim formed at the tip of the contact.

Abstract: An electrical contact for a multipole electrical connector, includes a contact section (56a, 57a) having a C-shaped portion with a contact point at a peak thereof; an intermediate section (56d, 57d) extending from an end of the contact section; a press-fit section (56b, 57b) extending from an end of the intermediate section; and the intermediate section having a thickness which is gradually increased toward the press-fit section, thereby bending uniformly the intermediate section when a lateral force is applied. The intermediate section has a C-shaped base portion to further reduce the spring constant. The length of an intermediate section is made different from those of adjacent intermediate sections so as to offset the contact points alternately, thereby minimizing the plugging force.

Abstract: A method of fabricating a pin tip is provided by a cutting and coining operation which first forms a pin tip which has a generally rounded configuration defining 4 slightly curved convex sides joined at 4 edges converging at a pin end. Thereafter the pin tip is coined again thereby overlapping portions of the conductive plating layer over the sharp edges of the pin tip.

Abstract: An electrical connector (10) includes a first housing part (20) fixed to a circuit board and a second housing part (30) fitted within the first housing part and spaced therefrom to alow limited X, Y, and Z movement between such parts, contacts (40) are provided including solder post portions (42) mounted in the first housing part and contact portions (41) in the second housing part adapted to engage the contacts of a mating housing. The contact portions (41) and (42) are interconnected by an integral S-shaped spring (43) to facilitate limited and resilient movement of the contact portions and housing parts to relieve stresses and strains caused by mating and unmating of components, including further connectors to a circuit board through the connector. An alternative embodiment (10') includes legs (42') and a J-shaped contact portions (40') in the second housing part (30') with the connector (10') being adapted to be surface mounted and soldered on a circuit board.

Abstract: An electrical connector (10) wherein the contacts (32, 34) have tail portions (40, 46) extending into respective holes (18) of a printed circuit board (16). The tail portions are gently curved, which provides a centering of the distal ends (48, 56) of the tail portions over the respective circuit board holes and also results in a low insertion force. Retention is provided by friction of the tail portions against the walls of the holes. The gentle curve of the tail portions keeps them close to the walls of the respective holes so that when a surface mount solder process is utilized, each tail portion provides a wicking action to concentrate the small amount of solder which is available in the region where the tail portion is close to the wall, resulting in a strong mechanical and electrical solder joint without requiring the hole to filled with solder.

Abstract: An electrical assembly which includes a first circuit member (e.g., TCM) with at least one conductive pin projecting therefrom for being frictionally and electrically engaged by a flexible portion of circuit means of a second circuit member (e.g., PCB). An opening is provided within the PCB relative to the flexible portions such that these portions project at least partly across the opening and frictionally engage respective conductive portions of the pin when inserted within the opening. Each of these flexible portions in turn is part of a circuit layer which may be coupled to respective conductive planes or the like within the PCB, while the respective conductive portions of the pin may in turn be electrically coupled to various conductive layers within/upon the TCM.

Abstract: An electrical connector includes a dielectric housing having a terminal-receiving passage defining a terminal-insertion axis for receiving a mating terminal member. A stamped and formed sheet metal contact member has a contact end disposed in the passage and a terminal end projecting from the housing. The housing has top and bottom walls, with the terminal-receiving passage extending in a direction therebetween. A slot is provided in a side wall of the housing communicating with the passage. The contact end of the contact member is inserted into the slot and is generally planar and has a terminal-receiving slot. The plane of the contact end and the slot are disposed generally transverse to the terminal-insertion axis. The contact member includes an intermediate portion located adjacent the contact end to provide additional flexiblity to the contact arms at the contact end.

Abstract: An electrical contact having one or more spring-biased tabs for mounting to a circuit board precludes the need for additional mechanical fasteners and obviates any additional manufacturing steps, except for soldering. The tabs are formed and shaped to provide springs which, when inserted into holes in a circuit board, compress and grip the interior wall of the hole.

Abstract: An electrical terminal is interposed between first and second opposing conductive surfaces. The terminal includes an intermediate support portion and first and second spring contact portions projecting from the intermediate support portion for respectively engaging the first and second opposing conductive surfaces. Complementary interengaging latches are provided between at least one of the first and second spring contact portions and the intermediate portion for holding the one spring contact portion out of engagement with the respective conductive surface. The electrical terminal is disclosed mounted within a connector housing by a floating mount to afford limited movement of the terminal relative to the connector housing.

Abstract: An electrical connector (19) for mounting against a circuit board (13) comprises, an insulative strip (20), conductive sockets (21) in the strip (20), solder tabs (35) projecting from the sockets (21) and outwardly from a corresponding edge (29) of the strip (20), a bottom of the strip (20) serving as a first mounting surface for engagement against the circuit board (13), and the solder tabs (35) being adapted for being bent, first, in a direction toward the bottom of the strip, and then, to extend outwardly from the edge (29) at nearly the same level with the bottom, and the top (23) of the strip (20) serving as a second, alternative mounting surface for engagement with the circuit board (13).

Abstract: An integrated circuit package is provided with a plurality of contact element leads, each lead having a first portion for making electrical connection with the integrated circuit and a second tapered contact portion for mating with a conductive rim of the hole of a circuit board. In conjunction with the integrated circuit package, a fastener is provided for holding the tapered contact elements in mating relationship with the conductive rims. The tapered contact portion of the lead of the integrated circuit package may take any of various forms, as long as the lead is tapered and resilient so that proper mating with a conductive rim can be accomplished. Likewise, the fastener which holds the tapered contact elements in mating relationship with the conductive rims may take any of numerous forms. All that is required is that the fastener couple to both the circuit board and the integrated circuit package, and that the integrated circuit package be removable from the fastener.

Abstract: A printed circuit contact system for use in high speed digital applications includes a generally tapered slotted socket made of beryllium copper or other conductive spring material. The socket has a wave-like configuration which forms a series of outer contact portions which alternate with increasingly smaller inner contact portions. Insertion of an appropriately dimensioned pin through the socket causes engagement of the pin with at least one of the inner contact portions to radially expand the socket and force adjoining outer contact portions to abut against a sleeve lining a hole in a printed circuit board into which the socket is inserted. Expansion of the socket provides at least one portion thereof which is always under optimum load, assuring proper retention and physical and electrical contact over extended periods.

Abstract: A retention device (50) for retaining a terminal (40) in a hole in a plastic housing is disclosed. The device (50) comprises two sets of outwardly projecting nibs (52) on a cylindrical section (44) of the terminal (40). Each nib (52) includes a flat edge surface (54) normal to the axis of the terminal (40).

Abstract: An electrical connector for establishing electrical connection between spaced printed circuit boards, for example, comprising a spiral-wound elongated spring member formed of a one-piece blank and being longitudinally resilient for establishing firm surface contact between circuit boards and radially resilient to provide firm contact in a surrounding receptable when either end of the connector is compressed. A signal connector is fitted into a carrier block and surrounded by ground connectors to protect the signal from interference. The connector design is small in overall length to minimize connector-length related disturbances to the signal.