Abstract: Input/output memory cards for use with computers and computer-related equipment. The cards (10) comprise connectors (40) adapted to mate with a printed circuit board (30) interfacing data from the printed circuit board to an outside environment which will utilize the memory card, lateral receiving pockets (50) on a frame (20) in the memory card for locking the connector to the frame and providing structural integrity to the memory cards, and interlocking tabs (60) integrally disposed on the connector and further adapted to mechanically interface with the lateral receiving pockets (50) for securely locking the connector to the frame and providing structural integrity to the memory card when the connector is mounted to the printed circuit board and mated to the frame. Memory cards in accordance with the present invention have significantly improved structural integrity as compared to prior memory cards.

Abstract: An electrical connector comprises a plurality of contacts (6) held in respective housings (5) in an insulating body (4), interconnections being provided to electrically interconnect respective lengths (7) of the contacts (6) that are electrically insulated from the respective contact bodies. The interconnections comprise contact rings (8) surrounding the respective contact lengths (7) and made of an elastically-deformable conductive material, each of the rings being helically wound over at least half a winding turn around the corresponding length and being resiliently clamped thereon; two rigid plates (9) at least one of which is made of a conductive material and which are pierced by a multiplicity of holes (10) through which the contacts (6) of the connector can slide freely, the plates being disposed on either side of the contact rings; and clamping means (11, 12) for clamping the two plates together and resiliently compressing the contact rings in the longitudinal direction of the contacts.

Abstract: The present invention is a connector having a socket connector including a cover and a plug connector to be engaged with the socket connector, wherein the cover is made of metal, the metal cover is pivotally secured at its one end to a molded body to be rotatable, energized by a spring having a connecting portion to be connected to a ground, and the metal cover is conducted to the ground by the spring.

Abstract: A wafer-like insert has a plurality of holes therein which correspond to pins of an electrical connector. The wafer includes contacts for making electrical connection to the pins, connector shell or electrical components. In such manner, the wafer can be used for a wide variety of purposes such as conditioning signals carried by the pins and grounding selected pin(s) to each other and/or the connector shell. The wafer can be installed in any common electrical connector pair without prior modification or preparation of the connectors and without impairing the normal fit or function of the mated connector pair.

Abstract: A connector interface assembly is disclosed which includes modules which contain electrical terminals of an electrical signal or power source. The assembly also includes a ground plate and a module retainer block having receptacles for removably receiving the modules therein. The retainer block and the ground plate are removably attached to a multi-contact connector. The ground plate has an open area for receiving the multi-contacts of the connector therein, and the retaining block has a cavity for receiving the ground plate therein. The receptacles are positioned at a higher level relative to both the grounding plate and the multi-contact connector in order to facilitate connection of conductors of the electrical source to both the grounding plate and the multi-contact connector. The proximity of the modules to the ground plate and open area of the retainer block allows for minimizing impedance loss due to the use of minimal length ground and signal/power leads from the module.

Abstract: A circuit board standoff including a body adapted for disposition between first and second boards so as to maintain a predetermined minimum spacing between facing sides thereof; a stem fixed to the body and adapted to engage an opposite side of the first board; a fastener fixed to the body and adapted to engage an opposite side of the second board; and a ground mechanism retained by the standoff and including a first electrical contact adapted to engage the first board, a second electrical contact adapted to engage the second board, and an electrical connector connecting the first and second contacts.

Abstract: A shielded electrical connector assembly includes a dielectric body, a terminal mounted on the body and a conductive shield about the body. The body is overmolded about a plate-like ground plane which has wings projecting outwardly of the body. The shield has slots into which the wings of the ground plane are inserted to thereby facilitate mounting the body in the shield and conductively coupling the ground plane with the shield.

Abstract: A flexible grounding element comprises a rectangular base portion, and a pair of side portions extending obliquely and upward from the edges of the base portion. Each of the side portions includes a pair of slots at the intermediate portion of its edges. One of the side portions bends toward the other one of the side portions at the location adjacent to the slot to form a bend portion. The front end of the bend portion bends upward to form an end portion which contactably touches the inner side of the other side portion. As the side portions are being pressed, a portion of each side portion will pass through the hole of a mother board, and as the side portions are released, the slots thereof will urge against the inner rim of the hole to effect positioning. Furthermore, each corner of the base portion has a flexible plate which includes a protrusion at the bottom thereof.

Abstract: An electrical connector assembly 10, and method of assembling, comprising a front electrical connector 12 and a rear electrical connector 23 secured together at a separable interface, the front electrical connector 12 including securing means 19 and guiding means 68 and a rear electrical connector 23 including receiving means 56 and aligning means 74. The securing means is engaged by the receiving means to assemble the electrical connector assembly 10 by drawing the front electrical connector 12 relatively toward the rear electrical connector 23, and the guiding means 68 being engaged by the aligning means 74 to maintain the front electrical connector 12 in a precise spatial relationship with respect to the rear electrical connector 23 during assembly and disassembly.

Abstract: In the filter plug connector, connector pins (104) are conducted through a chamber of a strip body (101). A ferrite core arrangement (109) with apertures in the grid of the connector pins is pushed over the connector pins (104). In addition, a capacitive planar filter arrangement (105) is slipped over the connector pins (104) and held in the strip body by means of a shielding casing (103). The ferrite core arrangement is held in the strip body without play by spring elements of insulating material which are formed onto the base of the strip body or onto an additional holding strip. The planar filter arrangement (105) has a single soldering plane offset from the rear side of the strip body both for the connection to the connector pins and to the shielding casing.

Abstract: A multipole connector includes a housing having at least one conductive shell. Signal lines with pins extend through the housing, especially for carrying digitized signals. A base plate is disposed in the housing and is formed of aluminum-oxidic or ferromagnetic ceramic. A planar filter is mounted on the base plate in the housing. The planar filter has one capacitor for each of the pins of at least some of the signal lines. The capacitors are formed by a base electrode applied to the base plate, a dielectric layer applied onto the base electrode, and a counter electrode applied onto the dielectric layer. One of the electrodes is continuously constructed as a ground electrode and is conductively connected to the housing. The other of the electrodes is subdivided into individual signal electrodes and is conductively connected to the signal lines. The base plate, the dielectric layer and at least one of the electrodes have recesses formed therein forming ducts for the signal lines.

Abstract: An electrical connector includes a plug connector having a plug shell formed with a flange and a receptacle connector having a receptacle shell provided on its outer circumference with a fitting device. The electrical connector further includes a coupling ring surrounding the plug shell and rotatable and holding the flange of the plug shell. The coupling ring has on its inner circumference a fitting device fitted with the first mentioned fitting device and a flange urging portion for urging the flange. The electrical connector includes at least one wave-shaped annular spring interposed between the flange and the flange urging portion and rotatable together with the coupling ring.

Abstract: A method of forming conductive end portions on a flexible circuit member having a dielectric layer (e.g., polyimide) with at least one conductive element (e.g., copper) thereon. The method comprises the steps of forming (e.g., punching) an opening through both dielectric and conductive element, providing (e.g., additive plating) an electrically conducting layer on the opening's internal surface, providing (e.g., electroplating) a plurality of dendritic elements on the conducting layer's surface, and thereafter removing (e.g., punching) a portion of the dielectric and conductive element such that the formed dendritic elements (e.g., palladium) project from the flexible circuit's conductive ends.

Abstract: A modular connector assembly comprises a main shell assembly having an aperture therethrough defining a inside surface. An electrical circuit assembly is disposed in the main shell aperture and includes a filter module and a transient suppression module each in electrical engagement with a plurality of electrical terminals. The filter and transient suppression module each define a conductive subassembly shell and each include grounding means disposed to engage the inside surface of the aperture in the main shell assembly in electrical grounding contact. Both the filter and transient suppression modules each define a first and second guide means disposed to engage first and second aligning means of the main shell member permitting facile precision assembly.

Abstract: A surface mounted connector adapted to attach a cable to a printed circuit board wherein all contacts necessary to establish electrical continuity between the circuit board and connector are made on a single surface of the circuit board.

Abstract: An electrical connector includes a plug connector having a plug shell formed with a flange and a receptacle connector having a receptacle shell provided on its outer circumference with a fitting device. The electrical connector further includes a coupling ring surrounding the plug shell and rotatable and holding the flange of the plug shell. The coupling ring has on its inner circumference a fitting device fitted with the first mentioned fitting device and a flange urging portion for urging the flange, and a key provided between the receptacle shell and the plug shell for preventing relative rotation therebetween. The electrical connector includes at least one wave-shaped annular spring interposed between the flange and the flange urging portion and rotatable together with the coupling ring.

Abstract: A termination bracket for installing a multi-pin connector to a panel or chassis wall permits a table wire braid to be grounded with as short a pigtail is possible, and minimizes the unshielded length of cable at the connector where the braid has been stripped away. The termination bracket can be formed as an aluminum alloy stamping, with a base and one or more comb walls. Slots are provided at the distal edge of the comb wall to receive the grounding pigtails. The comb walls are provided with a solderable surface, such as a copper flash followed by nickel plating.

Abstract: A connector (22) includes a housing (24) having an array of first terminal-receiving passageways (34) each in communication with a spring arm receiving recess (38), each passageway (34) having a terminal member (50) disposed therein. Each terminal member (50) includes a body section (52) having a first connecting portion (54) adapted for surface mount engagement with a circuit pad (122) of a circuit board (120) and a spring arm portion (60). The spring arm portion (60) has a first transverse portion (62) extending laterally from the terminal member (50) proximate the first connecting portion (54), an axial portion (64) of a selected length extending from the first transverse portion (62) and toward a second connecting portion (72) of the terminal member (50), and a second transverse portion (68) extending toward the body section (52). The first transverse portion (62) extends essentially parallel to the mounting face (28) and is recessed therefrom.

Abstract: A connector is provided which includes a screw-connected two-peice housing (22, FIG. 2) that surrounds an insulator-holding sheet metal shell (20), which resists loosening of the screws that hold the housing parts in ground connection with the shell. Each side of the insulator has three protuberances (81-83) which press outwardly against a corresponding side (76) of the shell, and each housing part has a pair of protuberances (94, 95) that press inwardly against a corresponding side of the shell. The protuberances on the insulator and housing parts are spaced to deflect each side of the wall into a largely sinusoidal shape (74 in FIG. 6), so the deflected shell sides act like leaf springs that press the housing parts apart to prevent screw loosening and assure good grounding connection between the shell and housing.

Abstract: A multiple pole electrical connector includes a cylindrical metal shell (6); and insulation housing (7) placed within the metal shell and having a plurality of ground member recesses (20) formed on its circumferential surface; a plurality of detachable terminals (8) supported by the insulation housing, one of the detachable terminals serving as a ground terminal (9); and a detachable ground member (23) mounted on the ground terminal with a shell contact portion (24) thereof fitted in the ground member recess such that when the insulation housing is placed within the metal shell, the shell contact portion comes into close contact with an inside of the metal shell.

Abstract: An electrical plug (1) includes a conductive shell (6); an insulation housing (7) placed within the conductive shell and having at least one terminal mounting aperture (22); at least one detachable terminal (8) mounted in the terminal mounting apertures; a detachable ground terminal (9) mounted in the terminal mounting aperture; a retainer member (10) for retaining the detachable terminal and the detachable ground terminal; and a detachable ground member (23) attached to the ground terminal and having a comb contact (24) held between the conductive shell and the insulation housing.

Abstract: An electrical plug (1) includes a conductive shell (6) having an inner stopper shoulder (66); an insulation housing (7) placed within the conductive shell and having at least one terminal mounting aperture (22); at least one detachable terminal (8) mounted in the terminal mounting apertures; a detachable ground terminal (9) mounted in the terminal mounting aperture; a retention member (10) for retaining the detachable terminal and the detachable ground terminal; a conductive stopper ring (32) for cooperating with the inner stopper shoulder of the conductive shell to hold the insulation housing and the retention member within the conductive shell; a detachable ground member (23) attached to the ground terminal such that part of the ground member is brought into contact with the conductive stopper ring.

Abstract: An electrical connector assembly includes a first insulative housing (12) which defines a plurality of first passages (14) extending therethrough for receiving corresponding electrical conductive members (22). The first insulative housing (12) also defines a corresponding number of apertures (42) thereof for receiving electrical filtering components (30), such as a TVS chip, and each apertures (42) is parallel to and communicates with one side of the first passage (14). A second insulative housing (16) defines a plurality of second passages (38) corresponding to the first passages (14) of the first insulative housing (12) for receiving the same conductive members (22), and also defines a corresponding number of cavities (40) thereof for receiving conductive bridge members (34).

Abstract: A supportive ground clip for a computer system board mounted in a computer chassis and a method for installing a grounded printed circuit board in a computer chassis using the supportive ground clip. The supportive ground clip includes a base member for providing a grounding connection with the chassis, flexible support members attached to opposite ends of the base member and ascending vertical members attached to the flexible support members for mounting the supportive ground clip to the computer system board. Each of the flexible support members includes a contact point for providing a grounding connection with the bottom side of the computer system board and each of the ascending vertical members includes a contact point for providing a grounding connection with the top side of the computer system board. The first and second flexible support members are shaped such that compressive forces exerted on the supportive ground clip support the computer system board within the chassis.

Abstract: A printed circuit board for mounting in a housing, having a mounted connector for making connections with the circuit board through the housing includes a layer formed from electrically insulating material and a conductive structure formed on such layer which conductive structure is adapted to be connected to ground. A casing, also formed from electrically conductive material, is shaped to surround a portion of the connector and is electrically connected to the conductive structure so that electromagnetic radiation emanating from the circuit board will not pass through the connector. In embodiments where the connector is mounted on an edge of said circuit board, the casing surrounds all of but the open end of the connector. In a preferred embodiment the casing includes a top portion, connected to the conductive structure, for surrounding the top of the connector and a bottom portion, also connected to the conductive structure, for surrounding the bottom portion of the connector.

Abstract: An assembly for securing a pump ground wire to the interior of a well casing comprises a support member adapted for placement into the well casing at its upper end. The support member is suspended within the well casing by a pair of suspension members having lateral tabs for resting on top of the well casing. A ground connection system is provided for establishing a ground connection between the pump ground wire and the well casing without connection to the exterior of the casing and without forming an opening in the well casing. Various embodiments are illustrated for establishing the ground connection between the ground wire and the well casing, utilizing the support member for achieving the ground connection.

Abstract: A snap eyelet is provided for securely mounting an electrical connector housing to a circuit board and for completing electrical connection between a conductive shield on the housing and a ground circuit on the circuit board. The snap eyelet is constructed to avoid an initial deflection of the board engaging structure during mounting onto the electrical connector housing. In particular, the snap eyelet includes a cylindrical shank dimensioned to be slidably inserted upwardly into a mounting aperture of the connector housing. The bottom end of the shank include flanges which engage a bottom surface of the connector housing when the shank is inserted upwardly into the mounting aperture of the housing. The top end of the shank is provided with tabs that are deflectable into engagement with the top surface of the connector housing for securely engaging the shank therein.

Abstract: A right angle connector is adapted to be mounted on a printed circuit board and includes a connector housing having a front mating portion, a conductive shield having a shroud adapted to surround the front mating portion, and a tail aligner to support tail portions of terminals disposed in the connector housing. The shield is secured to the connector housing by latching tabs secured in apertures in the housing and includes a pair of ground straps with ground tabs projecting therefrom, each of the ground tabs has a curved end portion that is adapted to fit into holes in the printed circuit board on which the connector is to be mounted. The tail aligner has positioning and mounting tabs that latch into apertures in the connector housing so as to secure the tail aligner to the connector housing.

Abstract: An electrical connector is provided for mounting to a substrate such as a printed circuit board or the like. The connector includes an insulative housing having a top, opposite sides and a base portion which is mountable to the printed circuit board. A conductive shield is positionable about at least a portion of the housing. A unitary conductive ground strap is mounted on the housing in engagement with the shield and includes a pair of legs depending along the opposite sides of the housing. The legs have tail portions at the distal ends thereof projecting beyond the base portion of the housing for insertion into holes in the printed circuit board to ground the shield to appropriate ground traces on the board.

Abstract: There is disclosed a stacked electrical connector assembly (20) for mounting on a printed circuit board (108). The stacked electrical connector assembly includes a bracket (26) having first and second bracket members (90,96). The bracket has a shield member (28) electrically commoned with at least one of the first and second bracket members. A first electrical connector (22) is mounted on the first and second bracket members with the housing (30) thereof on a first side of the shield member (28). A second electrical connector (24) is mounted on the first and second bracket members with the housing (60) thereof on a second side of the shield member (28). The contacts (44,74) of each of the first and second electrical connectors are interconnectable with traces (110) on the printed circuit board when the assembly is mounted thereon.

Abstract: Grounding mechanism for the electrical connection of shieldings of multi-pole plugs to the ground potential layer of a printed circuit board having a plurality of perpendicularly extending contact blades. A punched strip is provided with transverse slots, is bent around its longitudinal axis and has two edge regions, whereby outwardly arced spring regions of the punched strip proceeding parallel to the transverse slots are respectively arranged between the longitudinal axis and one of the edge regions, whereby webs having recesses are arranged at prescribed intervals from one another in a first edge region and clearances aligning with these webs are provided in a second edge region, and whereby the edge regions are bent pointing toward one another.

Abstract: A water heater having an electrically grounded water tank including an electrically conductive portion, a water tank inlet and outlet connected to deliver water to and from the water tank, a heater connected to the tank for heating water in the tank, a control for controlling the application of heat to the water, an electrically grounded outer jacket surrounding the water tank, a bottom member electrically grounded to the outer jacket, and a spring urged electrical bonding clip secured to and electrically connected to the bottom member and directly electrically engaging the water tank electrically conductive portion.

Abstract: A system for grounding telecommunications cable rack assemblies and the like. The system comprises the positioning of an electrical conductor element beneath each end of at least one of the U-shaped clamp elements of a clamping junction between adjacent cable rack sections. The conductor elements comprise means for piercing the non-electrically conductive painted surface of the adjacent cable rack sections and forming electrical continuity therebetween through the clamping junction when the U-shaped clamp elements thereof are tightened on the adjacent cable rack sections.

Abstract: A socket with a lock, in which a plurality of socket contacts (13) are held in a body (11) of a resin material, the body has an annular groove (14) cut therein outside the contacts and a ring-shaped metal cover (15) is secured in the annular groove along its outer peripheral surface. The ring-shaped cover (15) has an engaging edge for locking use (16) and at least one inwardly protruding lug (17).

Abstract: An interconnect strip is provided for effecting electrical interconnection between pluralities of conductor pads disposed on circuit boards or the like in a high density configuration. The strip is fabricated from a polymer film carrier having laminated thereon a metal foil with preselected spring properties. After lamination, lithographic techniques from a series of electrically isolated metallic beams on the carrier. Additional chemical processing removes portions of the carrier at opposing sides of the strip to expose opposing ends of the beams which extend beyond the carrier parallel to one another in opposing directions outwards from the carrier. By urging the pads towards respective beam ends of the strip disposed between the pads until mating engagement therewith, a plurality of electrical interconnections are established through the beams.

Abstract: An electrical connector includes an insulating housing (100) consisting of a front section (111) and a rear section (112), the front section having a cylindrical contact support section (120) with a plurality of contact apertures (121) extending along its longitudinal axis and the rear section having a rear cavity (119) in a lower portion thereof; a plurality of L-shaped contact elements (300) each having a contact portion (301), an intermediate portion (302) extending rearwardly from the contact portion, and a terminal portion (303) extending downwardly from the intermediate portion, the contact portion being fitted into the contact aperture; and a block member (200) having a plurality of lateral channels (201) for receiving the intermediate portions and a plurality of vatical apertures (202) for receiving the terminal portions, the block member being fitted into the rear cavity so that the intermediate and terminal portions are fitted into the lateral channels and the vertical apertures respectively.

Abstract: A shaft-grounding stuffing box cover (10) includes an annular nut-base (12) that includes a central aperture (14) through which a rotating shaft (16) passes. Two grounding tabs (28 and 30) project longitudinally upwards from the proximal end of the nut-base (12) adjacent the rotating shaft. The grounding tabs include diametrically opposed radial openings (18) that are longitudinally displaced from each other for the mounting of conductive brush contacts (20) therein. The conductive brush contacts are biased against the rotating shaft by backing springs (46), and are retained within the radial openings by hollow bolts (48). The hollow bolts, spring, and brush contacts form an electrically conductive path to the rotating shaft for grounding of the shaft.

Abstract: A mounting structure includes an insulating housing (10) having an annular recess (14) extending rearwardly from a front end thereof for receiving a shell member of a mating connector; a metal end face protection member (40) attached to the front end and having a circular opening (41) for receiving the shell member; a pair of attachment sections (43) extend rearwardly from opposite sides of the end face protection member; a pair of leg members (45) extending downwardly from lower edges of the attachment sections to be secured to a printed circuit board (50); and a latch device (13B) provided within the insulating housing for engagement with the attachment sections whereby the end face protection member is locked to the insulating housing.

Abstract: An electrical connector (2) is adapted at its forward end for insertion from the rear forwardly within a through opening (10) contained in a base member (1). A snap fastener retaining arrangement including a pair of resiliently outwardly biased hook members (6) on opposite sides of the connector is adapted to automatically engage corresponding shoulders on the base member when the connector has been inserted to a given position within the base member opening. The connector is thus releasably retained in position, whereupon the connector may be rigidly fastened to the base member by second fastener devices (4) operable from the front of the base member. Upon disconnection of the second fastener devices, the hook members may be manually compressed inwardly toward the connector to release the snap fastener retaining arrangement, whereupon the connector may be withdrawn from the base member opening.

Abstract: A shield member for mounting onto an electrical connector comprises a shield section secured onto a dielectric housing with integral leg sections of the shield section being disposed in slots of the housing and mounting members integral with the leg sections extending through slots in housing and outwardly from a bottom surface of housing for engagement with hole in a circuit board.

Abstract: An electrical connector has an insulating housing having an annular recess for receiving the shell member of a mating connector; a cylindrical shield member fitted in the annular recess, which includes shield contacts extending in radial directions from a front edge of the shield member; a detachable end face protection member attached to the front end of the insulating housing for protection thereof, which includes an latch member for latching the detachable end face protection member to the front end, whereby the shield contact comes into contact a backside of the end face protection member.

Abstract: An electrical connector includes an insulating housing having an annular recess extending rearwardly from a front end thereof and a shield member having a cylindrical wall fitted into the annular recess, a plurality of contact lugs extending outwardly in radial directions from a front edge thereof, and a leg member for connection with a shield circuit of a printed circuit board. The shield member has a plurality of first cantilever contacts bent outwardly and then inwardly forming an outward projection for contact with a metal shield provided on an inside of a mating shell member and a plurality of second cantilever contacts bent inwardly and then outwardly forming an inward projection for contact with a metal shield provided on an outside of the mating shell member.

Abstract: An EMI shielded connector is provided having an exterior receptacle shell, plug housing and coupling member constructed of plastic. Metallic sleeves line the shell and housing interiors and enclose insert assemblies. The sleeves are releasably engaged at a joint connection to provided electrical continuity through the connector for EMI protection. A junction means may be used to enhance electrical communication at the joint connection and a sealing member is used for environmental protection of the connector interior parts.

Abstract: A connector adaptor assembly comprising a trough-like frame made of resilient dielectric material and having a connector retainer end portion wherein opposing side walls of the frame are integrally joined to respective taller resilient posts having respective inwardly projected portions extending toward one another. Distal end portions of the posts have adjacent an end of the frame respective surfaces supporting respective integrally protruding bosses which are spaced laterally a predetermined distance apart. The assembly also includes an electrical connector with a cylindrical body disposed recumbently in the frame and having chordally disposed in opposing portions thereof respective slots which are aligned with the respective posts. Adjacent the slots, an annular flange extends radially outward of the body and has a diameter greater than the predetermined distance of lateral spacing between the bosses.

Abstract: The present invention provides an improved grounding system for a kinescope having a conductive outer coating. The system includes a conductive metal tape having an adhesive on one surface thereof and exposed metal on the other surface thereof. The metal tape is adhered to the kinescope by its adhesive side. The metal tape extends from the conductive outer coating to means on the kinescope connecting to an electrical ground, and it is in electrical contact with the coating and interconnecting to the electrical ground through the means.

Abstract: A device and method facilitates grounding shielding, including hardware and structures necessary to allow proper connection, practice the steps of the method, minimize pigtail length, facilitate the formation of a wire bundle assembly, facilitate repair and installation, and result in materials and labor savings.

Abstract: A shielded electrical connector includes a housing arranged to receive a shielded cable, a connector for connecting the cable shield to the connector housing, a connector element located in the housing with contacts connected to tracks on a printed circuit board within the housing, a ground plane spaced from the printed circuit board and electrically connected to the connector housing and a plurality of surge arrestors located between respective tracks on the printed circuit board and the ground plane. A resiliently flexible member may be located between the connector housing and the ground plane for making an electrical connection between the housing and the ground plane.

Abstract: The connection and shielding system for modular RF circuits encases modular circuitboards (10) within five-sided enclosures (11). The sixth side of each enclosure is provided by the top ground plane of a base circuitboard (20) that supports and electrically interconnects the components of the modular circuitboards (10). Enclosures (11) are fixed to a grounded metal socket formed by fence strips (22) and metal inserts (23) which form upwardly open slots including yieldable longitudinal gaskets (50). Gaskets (50) yieldably grip the open end of enclosures (11) and seal them against escaping radiation. Further radiation shielding is provided about the base circuitboard (20) by the fact that the conductive signal traces provided in it are sandwiched between two continuous ground planes and run between plated-through vias joining the ground planes. The ends of each enclosure are provided with double wall baffles (17, 18) which provide airflow to the interior and RFI shielding through offset open apertures (13).

Abstract: An electrically conducting device for use with an electrode roller suitable for causing the electrode roller, which removes electrostatic charges developed on the surface of a web or the like when the web is brought into sliding contact the roller or controls the charges into uniform ones, to conduct with respect to the ground or a power source. The conducting device includes an electrically conducting ring which is slidably fitted over the rotary shaft of the electrode roller. The conducting ring is prevented against rotation by rotation preventive means and is electrically connected through an electrically conducting member to the ground or power source.

Abstract: Bushing for the passage of at least one cable through a hole in a wall or similar structure, affording protection against electromagnetic overload and/or interference which bushing comprises two cable lead-through tubes which are each provided with a flange at its end which are detachably connected together with the aid of these flanges, while at least one earth plate is disposed between these flanges and electrically coupled therewith through a conductor in order to contact an electrically conducting braiding of the cable(s) passed through when the bushing is fully operational.