Abstract: A transmission line transformer (20, 30, 31) with inherent DC isolation has two sets (22, 22') of transmission line elements (ZN) with characteristic impedances which vary from relatively high values near the transformer inputs (P1, P2) to relatively low values near an intermediate location (28, 28') are ordered in a mirror image symmetry with respect to one another relative to the intermediate location (28, 28') in plural element embodiments (20, 30). The primaries (24, 24') are connected in series, while the secondaries (26, 26') of adjacent pairs of transmission line elements (ZN, ZN') are connected in series with the series connected pair connected in parallel across the output terminals (P3, P4). A center line transmission element (CZN) at the intermediate location (28') has a substantial zero impedance, and an electrical length equal to twice that of the other elements.

Abstract: A transmission line transformer that can balance imperfectly balanced signals, and can convert a balanced input to an unbalanced output. The transformer includes two unbalanced transmission lines each having a characteristic impedance Z.sub.o. The outer conductor of each is interrupted at its midpoint and is connected to the corresponding interrupted outer conductor of the other. An input signal applied across the ends of the first line's center conductor yields a balanced outer signal across the ends of the second line's center conductor. An unbalanced output can be obtained by terminating one end of the second line with an impedance Z.sub.o.

Abstract: An improved physical implementation of a high frequency impedance transformer circuit formed from three coaxial transmission line segments is described. In a preferred embodiment, each transmission line segment is in the form of a one and a half turn coil wrapped around a ferrite core. The ends of the coaxial transmission line segments extend through holes in a small PC board and planar conductors thereon. The ends of the transmission line shields are circumferentially soldered to some planar conductors on the board and the center conductors of the coaxial line segments are soldered to adjacent planar conductors on the board in such a way as to provide the desired circuit in a very compact and rugged arrangement.

Abstract: A transformer for modifying the characteristics impedance of a transmission line. The transformer provides non-integer-squared impedance transformation ratios without the need for tapping one of the windings or the use of other non-balanced techniques.

Abstract: A transformer for current supply and/or signalling purposes, in particular for use in a connector arrangement for electrical circuits in underwater installations, includes a magnet circuit, a first winding having a plurality of turns and a second winding having one or very few turns, whereby turn portions of both windings pass essentially in parallel through one or more openings in the magnetic circuit. For obtaining advantageous electrical properties, turn portions of the first winding are so arranged that along a major part of their length which is surrounded by the magnetic circuit they are individually enclosed by that or those conductors which constitute the turn portions of the second winding that are surrounded by the magnetic circuit.

Abstract: A pulsed transformer capable of providing up to 500 kilovolt or higher, 10 nanosecond rise time, and 1000 joule or higher pulses comprising non-conducting or insulated transformer cores each separated by conductive grading rings wherein n coaxial cables in combination with the grading rings are connected in parallel at one end and in series at their other ends. The transformer may function as either an inverting or non-inverting transformer. In a transformer with n cables, if a pulse voltage of V is applied to the input, an output voltage of nV will appear at the output. The cores function to isolate the coxial cables and permit them to be connected in series at their one end. Weight may be minimized by operating the transformer in gaseous Freon rather than transformer oil.

Abstract: Radio frequency chokes for use in combining and separating radio frequency signals and single phase AC power in the equipment used in cable transmission and distribution systems. The radio frequency chokes include a conductor wound on a magnetic core to form a primary winding upon which first and second swamping circuits are mounted. Each of the swamping circuits include a secondary winding with a resistor connected across the ends thereof with the swamping circuits effectively dampening parasitic resonances in the primary winding which occur in the frequeny range of from about 5 MHz to at least 800 MHz.

Abstract: The neutral excitation and differential current transformers of a ground fault circuit breaker are arranged for automated assembly onto the signal processor circuit board to complete the signal processor module prior to insertion within the ground fault circuit breaker housing. Electrical interconnection between the transformers is made by a unitary conducting strap having means therein for receiving the circuit neutral conductor. The completely assembled signal processor module is connected with the circuit breaker components by means of a single wire.

Abstract: A transformer includes a preformed winding with each turn having a channel cross section. The individual units are joined to form the desired multiturn winding. Another winding is inserted within the channel cross section of the multiturn winding. In one embodiment, the channels of the two turns are joined to form a closed passageway. In another embodiment, they are nested one within each other to form a concurrent passageway.

Abstract: A transformer utilizing a rotating flux for saturating the entire core. The transformer uses a core configured such that a vector sum of the induction produced by two windings in the core rotates through 360.degree.. This is accomplished by arranging the component induction vectors to be perpendicular and the source voltages associated with each of the component induction vectors to be 90.degree. out of phase. If the inductions are of equal magnitude and the vector sum is sufficient to saturate the core, rotation of the vector sum saturates the entire core and the transformer experiences a very low or nearly negligible hysteresis losses. Various topological configurations for the core, including a toroid, are described. The transformer windings can be arranged for single, two-phase, three-phase, or multi-phase operation.

Abstract: A low profile magnetic structure comprising E and I type core shapes is dimensioned with the passage length through the core window being very long compared with a cross sectional dimension of the windows. In a transformer design, windings passing through the window are designed to be coaxial with one winding being a shell for the other winding.

Abstract: A wide band impedance transformer for operating at radio frequencies whose impedance transformation ratio is equal to three within ten percent, comprising coaxial cables connected together so as to determine a transformation ratio equal to (5/3).sup.2 =2.78.

Abstract: A ground fault circuit interrupter interconnect arrangement provides wireless connection with line and neutral main current terminals by insertion through an aperture in the interrupter magnetic sensor module to form a magnetic sensor plug-in subassembly. The electronics components and trip solenoid are mounted to the interrupter printed wire board. The magnetic sensor subassembly is plugged into the printed wire board for interconnection with the electronics components. This allows the interrupter to be assembled in a completely automated process.

Abstract: A device for introducing an anti-microphony sponge into an air-cored coil for television channel selectors, comprising an axially displaceable hollow mandrel with an end portion which comprises two diametrically oppositely situated slots. Two blocking members can be introduced into the slots, after which cutting means are displaceable in a direction transversely of the axis of the mandrel. After the introduction of a length of spongy material into the mandrel, an air-cored coil is arranged on the end portion of the mandrel, after which the blocking members are moved into the slots so that the length of spongy material is clamped on both sides of the air-cored coil. Subsequently, the mandrel is withdrawn from the coil and the length of spongy material is cut in the zone between the blocking means and the withdrawn mandrel so that a piece of spongy material is left behind in the air-cored coil.

Abstract: A current transformer for very high tension units. The transformer has an insulating through bushing and an annular metal chamber both filled with compressed gas, a primary circuit with an input conductor which enters the chamber via the through bushing and an output conductor which leaves the chamber via the through bushing coaxially to the first conductor, and at least two magnetic circuits each having a secondary winding, wherein the current transformer has an electric side connection at the lower portion (21) of the metal chamber (11) and wherein the magnetic circuits (14, 15) are disposed on either side of said side connection.

Abstract: The invention relates to a current transformer for a high-tension installation, said transformer including a primary winding, a secondary winding and a magnetic circuit, said primary winding including a primary turn suspended coaxial inner and outer conductors in an insulation chamber which contains a dielectric fluid. The secondary winding (28) and the magnetic circuit (27) are disposed around the primary turn (6) on the outside of the chamber. Electrical continuity of the insulation chamber past an insulating seal (24) therein is provided by a jumper (29) which passes round the outside of the secondary winding and the magnetic circuit. The invention applies in particular to very high tension installations.

Abstract: High frequency transformer built from coaxial conductor sections, wherein a pair of coaxial conductor sections of equal length have external conductors which are insulated from each other. The input end of the external conductor of the first coaxial conductor section is connected with the input end of the internal conductor of the second coaxial conductor section and both of the unconnected input end internal and external conductors form input connections. The output end of the internal conductor of the first coaxial conductor section is connected with the output end of the external conductor of the second coaxial conductor section and both of the unconnected output end internal and external conductors form output connections.

Abstract: Especially simple structure for an electrical transformer device provides cost effective fabrication thereof and offers improved operating performance particularly in a radio transmitter circuit for coupling high levels of radio frequency energy from the output of a radio frequency amplifier to an antenna system. One winding of the transformer is formed from a single, unitary, tubular member arranged into a U-shaped configuration which includes a pair of spaced sets of openings therein for the two-fold purpose of allowing efficient threading of a secondary winding therewithin and to improve air cooling characteristics of the device. A second winding comprises a wire passed through the interior of the tubular member, and a number of cylindrically shaped magnetic elements are sleeved over the tubular member to enhance the mutual inductive coupling between the windings.

Abstract: A magnetic amplifier having a magnetic core in the shape of a hollow cylinder is provided with a gate winding comprising series-connected coaxial conductors passing through the center of the hollow core.

Abstract: An improved radio-frequency transformer, particularly useful in conductive-body antenna systems, is provided in which telescoping of two or more portions of the primary of the transformer results in increased compactness, high effeciency and decreased cost.