Abstract: An apparatus for minimizing degradation of fidelity of a signal in a transmission line intended for carrying signals of wavelengths greater than the length of said transmission line and wherein the signals are of frequencies over several octaves, wherein a structure of ferromagnetic material is employed encircling a transmission line and the ferromagnetic material, preferably a toroid, serves as core to a transformer with a secondary having a termination in a substantially short circuited load whereby ringing signals in the transmission line are dissipated in the secondary circuit. Therefore, the invention causes the frequency response of a cable to be umimpaired for the desired signal, and it simultaneously and selectively couples the undesired reflection currents into a secondary circuit where they are dissipated.

Abstract: A flat cable bus with fan-out patterns which provide equal length wires to eliminate clock skew is disclosed.

Abstract: A transmission line cable formed from a plurality of generally flat transmission line segments stacked together in interlocking relation is disclosed. The cable maintains consistent electrical characteristics in its individual conductors while permitting configuration into a round cable that can be mass terminated.

Abstract: A circuit assembly including a plurality of integrated circuit chips wherein electrical interconnections between chips at a relatively large distance from each other are accomplished by a conductor bus comprising a first section including conductors running adjacent and parallel to each other for a distance substantially equal to an integral number of half wavelengths of the base frequency of signals of the circuit and second sections including conductors which sharply diverge toward associated integrated circuit chips for electrical connection therewith.

Abstract: In a circuit assembly (36) having a semiconductor chip such as a MOSFET (12) mounted on a drain terminal lead frame (6) on a ceramic substrate (4), a combined source and gate return reference jumper wire (40) is connected between a current sense lead frame (52) and a combined gate return reference and current sense lead frame (38). The jumper wire has a first middle portion (42) connected to the source pad (14) of the MOSFET chip (12), and has a second middle portion 58 connected to the source terminal lead frame (8). Direct gate return referencing is provided, minimizing inductance in the gate return which is otherwise present when the gate return current path shares a portion of the source terminal current path. Direct current sensing is also provided, and the IR drop is sensed across the section of the wire jumper between the noted first and second middle portions (42and 58), without the need of an auxiliary resistor in series with the source terminal.

Abstract: A high density flexible circuit for coupling electrical devices. The flexible circuit has signal and ground traces on both sides of the flexible circuit. Each signal trace is surrounded by ground traces. There is a ground trace on either side of each signal trace and two ground traces located below each signal trace. This system of placing ground traces surrounding each signal trace reduces electrical noise between the signal traces and reduces the electrical capacitance of the circuit.

Abstract: A modification of a woven cable (wire and fabric woven together to form a flat ribbon cable) assembly, in which the signal wires of the transmission lines are replaced with solderable resistance wires, thereby providing an economical method of building multiple lossy transmission lines.

Abstract: A power supply cord having a noise filter is used for connecting an electronic apparatus to a power source, the noise filter being mounted on the cord within 30 cm from the end thereof connected to the electronic apparatus of the noise generating source. Such a power supply cord is used even with an electronic apparatus that does not have a noise filter so that a countermeasure for noise is easily provided without the especially troublesome application of wiring within a shielding case for the electronic apparatus. Since the noise filter is positioned within 30 cm from the end of the power supply cord to be connected to the noise generating source, the power supply cord does not act as a radiation antenna for the noise band from the noise generating source so that the power supply cord eliminates noise from both ends effectively and has a superior filter characteristic.

Abstract: The coil arrangement of a nuclear fusion apparatus according to the present invention comprises a return conductor divided into two lines, one of which is connected to resistance-inductance adjuster. The resistance-inductance adjuster is adapted to adjust the current distribution, thereby considerably reducing the error magnetic field generated to improve the characteristic of plasma confinement.

Abstract: A coil arrangement for a nuclear fusion apparatus comprises a return conductor radially penetrating through a coil at a portion having a transition between turns and a feed conductor symmetrically arranged with regard to the axis of the return conductor. The coil arrangement practically reduces current loops generated by the transition current, thereby practically reducing the generation of the error magnetic fields and, therefore, better confining the plasma.

Abstract: A directional transmission cable is disclosed which has a plurality of insulated conductive wires. The cable also has a source terminal and a destination terminal. A first connection of a collection of more than one of the wires is made to the source terminal. A second connection of less than all of the collection of wires is made to the destination terminal. A faithful transmission of a signal is made from the source terminal to the destination terminal.

Abstract: An EDM circuit arrangement incorporating a minimum-impedance electrical conductor assembly in a tubular form between an EDM pulse generator and a machining gap, the assembly having a first group of conductors connected between one terminal of the pulse generator and a tool electrode to conduct the machining pulses in one direction and a second group of conductors connected between the other terminal of the pulse generator to conduct the machining pulses in the opposite direction. An electrically nonconductive member contouring the tubular form and having these conductors mounted therein in mutually insulating and generally parallel and equally spaced relationship in an endless row, framing the tubular form, between its outer and surfaces and generally concentric therewith is provided. The conductors are arranged in such a manner that each of the conductors in the first group is axially aligned proximate with a conductor of the other group in the endless row.

Abstract: In an alternating current pipe-type cable system in which a group of individual insulated conductors are loosely disposed eccentrically within a conduit, an electromagnetic field shaping device interposed between the conductors and the conduit wall, so as to line the wall is configured so as to reduce eddy current losses in the conduit and in the conductors. The device is in the form of a slotted cylinder positioned so that the slot is diametrically opposite the group of conductors thereby to redistribute the magnetic flux induced. The device is preferably laminated in the radial and axial directions.

Abstract: In the case of power transmission cables, such as loudspeaker cables for connecting a loudspeaker to an amplifier, the problem occurs that on ensuring a high power transmission, it is simultaneously necessary to transmit information, e.g. also modulated musical information in an optimum undistorted and undisturbed manner from the amplifier to the loudspeaker. For solving this problem, it is proposed to construct one conductor of such a loudspeaker cable from an internal partial conductor and an external partial conductor surrounding the former and separated therefrom by a dielectric, said internal and external partial conductors being interconnected at the connecting elements.

Abstract: A transmission cable (30, 50) for an ignition system of a fuel burning engine has a body of electrical insulation (31, 51). The cable has embedded in its insulation either a distributed or lumped parameter capacitive element (32-34, 52-53) connected in parallel with either a distributed or lumped parameter resistive element (36, 56) which coact to increase the energy delivered to an igniter and hence to a fuel nodule. An igniter for such fuel burning engine has an electrical insulator (20, 520) and an electrode structure (130, 330, 530). The igniter may have a ceramic magnet insulator which accelerates the arc plasma and raises the arc's energy level. Arc transfer members (137-138, 537-538, 537'-538') are partially embedded in the insulator enabling long arcs to be supported.

Abstract: Process for manufacturing flat multi-conductor cable having two cable members and peelable internal lamina utilizes a pair of dies which simultaneously align conductors, laminate internal lamina, and extrude external lamina thereon. Each die has a conductor aligning surface with parallel linear conductor-receiving recesses therein and an adjacent extrusion surface. Conductors and internal lamina are drawn between aligning surfaces of mated dies and then between extrusion surfaces where vinyl is extruded through an aperture in each die to form external lamina. A knife-edged die insert adjacent one side of the aligning and extrusion surfaces provides a V-notch in one edge of the cable to facilitate peeling apart cable members for termination to a two-sided connector.

Abstract: A transmission cable (30, 50, 70, 80) for an ignition system of a fuel burning engine has a body of electrical insulation (31, 51, 71, 81). The cable has embedded in its insulation either a distributed or lumped parameter capacitive element (32-35, 52-55, 72-75, 82-84) connected in parallel with either a distributed or lumped parameter resistive element (36-38, 56-58, 76, 86-88) which coact to increase the energy delivered to an igniter and hence to a fuel nodule. The parameter values of the capacitive and resistive elements are such as to produce first order poles with only real parts in the complex plane defining the ignition current. Other parameter values are usable where such values limit the peak ignition voltage level drop in the cable to less than 20,000 volts. A feature of this cable is that the capacitive element is structured to produce electric and magnetic field components that cancel each other, thereby also reducing radio noise induction.

Abstract: A balanced-line transmission cable is disclosed for use in a communications system of the type having a differential driver which transmits a differential output in the form of two output voltage signals which are transmitted to two corresponding inputs of a differential receiver which produces an output proportional to the difference between the two input voltage signals. A woven balanced line transmission cable includes a plurality of balanced-line signal conductor pairs each pair consisting of first and second signal transmission wires laterally spaced closely adjacent one another and lying generally parallel with one another in the cable. The first and second signal transmission wires transmit one each of the two voltages for input into the differential receiver. A plurality of fiber warp and weft yarns are interwoven in the cable with the signal conductor wire pairs fixing the lateral spacing and parallel alignment of the first and second signal transmission wires.

Abstract: A woven electrical transmission cable is disclosed having a controlled impedance and reduced signal interference characteristic in which the density of the signal conductors may be increased without widening the configuration of the cable. The cable (A, F, K) is woven in a tubular configuration wherein the signal conductors (10, 30, 34) are arranged and woven about the periphery of the cable with a vertical spacing component between the conductors. The signal conductors are arranged with ground conductors (12, 32, 36) on each side thereof in the form of clusters (D, E, G, H) in strata about the periphery of the cable. In a preferred form the cable (F, K) is woven in a flattened oval configuration wherein the clusters of conductors are arranged in spaced layers which are generally parallel. In practice, noisy lines and quiet lines may be placed in opposed layers for maximum reduction of signal interference.

Abstract: Process for manufacturing flat multi-conductor cable having two cable members and peelable internal lamina utilizes a pair of dies which simultaneously align conductors, laminate internal lamina, and extrude external lamina thereon. Each die has a conductor aligning surface with parallel linear conductor-receiving recesses therein an adjacent extrusion surface. Conductors and internal lamina are drawn between aligning surfaces of mated dies and then between extrusion surfaces where vinyl is extruded through an aperture in each die to form external lamina. A knife-edged die insert adjacent one side of the aligning and extrusion surfaces provides a V-notch in one edge of the cable to facilitate peeling apart cable members for termination to a two-sided connector.

Abstract: A shielded flat electrical cable is formed of a plurality of twisted pairs of conductors. Individual conductors of each conductor pair are twisted about each other for at least one portion of their mutual length. The conductors are laminated to a film to maintain predetermined spacing and the electrical parameters of the cable. In a preferred embodiment, the shielding comprises a wider and a narrower tape, each having a conductive layer and an insulating strength-giving layer. The tapes are disposed on opposite sides of the core of the cable. The wider tape wraps around the edges of the core and overlies portions of the narrower tape so as to make electrical contact therewith, avoiding a slot effect.

Abstract: Several flat cable embodiments (10, 10', 10", 10'", 10"") are disclosed, as are methods and apparatus (30) for the selective manufacture and connectorization of same. In accordance with one preferred flat cable embodiment (10), adapted for telephone under carpet applications, two precisely offset arrays of rectangularly shaped conductors (13, 14) are separated by a center film (16), with each array being adhesively bonded through an associated adhesive coating (21 or 22) to only the respectively adjacent one of two outer films (18 or 19).

Abstract: A three layer printed circuit board comprises upper and lower layers which provide terminal locations for connection to pins of electrical connectors or electronic components which are to be connected in parallel by conductor tracks of the circuit board. In order to achieve an even distribution of conductor tracks between the layers, only certain terminal locations are connected to respective conductor tracks, the locations of the respective layers being electrically connected by plated-through holes. A conductive layer providing a ground plane is located between the upper and lower layers and has non-conductive areas providing clearance for the plated-through holes. Shield tracks are located between the conductor tracks and are connected to the ground plane by plated-through holes so that they form closed conductive loops providing shielding against capacitative and inductive cross-talk between the conductor tracks.

Abstract: There is disclosed a lattice cable and a method of making said, said lattice cable having a plurality of elongated insulated elements extending parallel to one another and uniformly spaced apart by integrally formed insulative ribs there between, the elongated insulative elements and the insulative ribs being constructed of a material having a first dielectric constant. At least every other one of the elongated insulative elements having an elongated electrical conductor partially embedded in the surface thereof so that a portion of the surface of the elongated electrical conductor is exposed along the length thereof, the elongated electrical conductors passing through and being covered by the integrally formed insuative ribs so that the exposed portion of the elongated electrical conductors is located between the insulative ribs. Each lattice cable thus formed may be placed in a layered combination with one or more other lattice cables.

Abstract: A multi-conductor transmission cable which includes a plurality of parallel conductors each of which may be insulated with a relatively low loss, high velocity of propagation material. The insulations surrounding an adjacent conductor pair may be joined by a homogeneous integrally formed EMF window web formed of the same material as the insulations. The thickness and length of the window webs are selected to control the electromagnetic interference between the conductor pair, as well as the impedance and capacitance. Individual, uninsulated screen conductors may be positioned between adjacent conductor pairs to further minimize EMF interference. The insulated conductors, their EMF window webs, and the uninsulated screen conductors may be encapsulated by either upper and lower layers of laminated insulation or by an extruded outer layer formed of a material having a velocity of propagation different from the conductors' insulations.

Abstract: To connect two bus bars to two sets of cables which are bunched to produce a low stray field, a connecting piece is provided, in which parallel, electrically conducting, plates are provided with angled-off connecting straps and connecting lugs, the connecting straps being connected to the bus bars and the connecting lugs being connected to the cable ends by means of cable terminals.

Abstract: There is disclosed a lattice structure having a plurality of elongated parallel elements interconnected periodically by integrally formed ribs therebetween and a plurality of elongated filaments, each of which is embedded in and adhered to one of the elongated parallel elements. The structure is constructed by a method which includes the steps of molding the lattice structure from film or laminate belts, heating the filaments above the melting temperature of the molded lattice structure, joining the heated elements with the structure and solidifying the lattice structure adjacent each filament.

Abstract: A cable for low-level signal transmission which exhibits reduced cross-talk interference. The cable consists of a four-conductor spiral quad of two opposed insulated signal wires and two non-insulated ground wires. Each of the wires may be stranded.

Abstract: A multi-conductor flat transmission cable which includes a plurality of parallel signal conductors each of which is insulated with a low loss, high velocity of propagation material. The insulations surrounding a send and return conductor pair are joined by a homogeneous integrally formed EMF window web formed of the same material as the insulations. The thickness and length of the window webs are selected to control the electromagnetic interference between the conductor pair, as well as the impedance and capacitance. Individual, uninsulated screen conductors may be positioned between adjacent signal conductor pairs to further minimize EMF interference. The insulated signal conductors, their EMF window webs, and the uninsulated screen conductors are encapsulated by an upper and lower outer layer of insulation formed of a material having a velocity of propagation different from the signal conductor's insulations.

Abstract: A method is disclosed for improving the transmission properties of balanced and unbalanced connectorized flat cable interconnection assemblies. In accordance with the method, a first set of generally parallel flat cable conductors are terminated on a first mapped set of connector contacts such that all conductors are connectable to a source of ground potential. A second set of generally parallel flat cable conductors are terminated on a second mapped set of connector contacts such that the odd-numbered conductors are connectable to a source of ground potential and the even-numbered conductors are connectable to a plurality of signal sources. The termination of flat cable conductors in accordance with this method also results in an improvement in the packaging density of pluggably interconnectable circuits.

Abstract: An improved cable having low crosstalk characteristics is comprised of a pair of multi-conductor cable members laminated together with the pairs of wires of and between the respective cable members being so spaced as to effectively form a balanced capacitivebridge configuration. The conductors of the cable members can be either round or flat in section and the cable members are preferably secured together across their entire width by means which allows the cables to be readily separated at the termination. This capability for separation of the cable members is also effective for inserting a tap means intermediate the ends of the cable.

Abstract: A woven electrical cable comprising a plurality of longitudinal conductor wires arranged in a substantially side-by-side manner for transmitting signals with a pair of longitudinal ground wires carried between adjacent conductor wires longitudinally coextending in a substantially parallel relationship with said conductor wires providing an associated ground wire on each side thereof for isolating a respective conductor wire. The conductor wires and ground wires are interwoven with insulating fiber strands to define a woven pattern with the associated ground wires being spaced from each respective conductor wire in the woven pattern so as to isolate and set the impedance of each conductor wire at a desired impedance value whereby the cable impedance may be controlled producing transmission of uniform signals with reduced cross-talk interference.

Abstract: A superconductor having a plurality of superconducting filaments embedded in a solid conductor of normal conducting material, and with each of the filaments being twisted about the longitudinal axis of the superconductor to form a helix which is concentric with respect to the longitudinal axis, in order to suppress coupling effects occurring between filaments on circles with different radii in time variable magnetic fields. Each of the filaments is twisted about the conductor axis to provide alternating equal length sections along the conductor axis with opposite senses of rotation of the filaments about the conductor.

Abstract: A novel winding assembly of the gap winding type electric rotary machine is arranged on the inner periphery of the slotless magnetic core of the machine. The winding comprises a plurality of congregated twisted strands each including a plurality of insulated thin wires. The congregated strands are twisted in opposite directions in such a manner as to offset the effect of magnetic fluxes produced in adjacent twisted strands axially thereof, thereby reducing the reactance of the winding on the one hand and dampening the vibration and propulsive force which otherwise might be generated in the electric rotary machine.