Abstract: An inductor for high current applications includes a nonconductive, tubular form which defines a tube axis and has a cylindrical outer surface. The outer surface is formed with a groove that extends helically about the tube axis. The inductor further includes a coiled, conductive wire that is formed with a plurality of turns. The wire is wound around the outer surface of the form with at least a portion of the wire disposed in the groove. With this structure, the form maintains a predetermined separation between adjacent turns of the coil preventing deformation of the coiled wire by strong magnetic forces that are generated when relatively high electrical currents are passed through the wire.

Abstract: A system for charging a capacitor with relatively high energy pulses at a relatively high pulse repetition rate includes a voltage transformer. A resonant circuit is established having an inductor connected to the transformer's low voltage side and a capacitor connected to the transformer's high voltage side. A power supply cooperates with a switch assembly to generate a train of pulses, alternating in polarity, in the circuit. With this arrangement, the transformer core is reset after each pulse. A rectifying circuit operates on the alternating polarity pulses to create a train of constant polarity pulses for charging the capacitor. For the system, the maximum charging voltage is regulated by a control circuit having a probe for measuring the voltage across the charging capacitor. This measured voltage is used by the control circuit to selectively operate the switch assembly and regulate the maximum voltage across the capacitor.

Abstract: An inductor for high current applications includes a nonconductive, tubular form which defines a tube axis and has a cylindrical outer surface. The outer surface is formed with a groove that extends helically about the tube axis. The inductor further includes a coiled, conductive wire that is formed with a plurality of turns. The wire is wound around the outer surface of the form with at least a portion of the wire disposed in the groove. With this structure, the form maintains a predetermined separation between adjacent turns of the coil preventing deformation of the coiled wire by strong magnetic forces that are generated when relatively high electrical currents are passed through the wire.

Abstract: A microwave ink drying apparatus for an ink jet printer includes a microwave applicator. The applicator may be attached to a movable print carriage. The applicator may further comprise a slot antenna. The slot antenna may be formed as a dual slot, with one portion of the slot coupled to a wave launching cavity, and the other portion of the slot coupled to an impedance matching cavity.