Abstract: A conductive structure in which conductive fibers a.sub.1 are sticked to the substrate B by melting thermally fusible fibers a.sub.2 entangling with said conductive fibers a.sub.1. This structure is manufactured by sticking conductive fibers a.sub.1 to the surface of the substrate B to which the cloth-like material A containing conductive fibers a.sub.1 and thermally fusible fibers a.sub.2 is sticked under pressure at a temperature not lower than a melting point of said thermally fusible fibers a.sub.2.

Abstract: The primary winding of an output transformer, having a secondary winding connected across a spark gap or other load, is divided into a main coil and at least one counteracting coil with a reduced number of turns connected in series opposition across a source of direct current. An amplifier in the primary circuit, to which a train of voltage pulses may be fed, comprises at least two stages formed by a driving transistor in series with the counteracting coil and a power transistor in series with the main coil, the transistors being interconnected in a Darlington configuration. The countervailing voltages appearing across the two coils produce between the collectors of these transistors a voltage difference which intensifies the collector current of the driving transistor to insure full saturation of the power transistor in a conduction phase.

Abstract: In a semiconductor circuit device of the Darlington type connection, the collector of a forward stage current amplifying transistor is of transistor connected to that point of the load of the succeeding stage power transistor which corresponds to an intermediate tap of the load.