Abstract: The invention relates to a method and apparatus for generating long-duration current impulses, as well as high-amplitude short-duration impulses, such as the type of pulses used in testing electrical equipment, in generating high magnetic fields, and for studying the properties of materials.A ladder network using equal capacitors in all its stages and equal inductances in all but the first and last stages forms the current generating apparatus. In order to convert the apparatus from a long current pulse to a short current pulse configuration the inductances are eliminated. In both configurations the internal resistance of the circuit elements constitutes the internal resistance of the apparatus.

Abstract: An amp-hour meter for a load driven by direct current, such as an electric vehicle, comprises a modulator connected across a resistor in series with the load for amplitude-modulating a pulse train from a multivibrator translated by a demodulator into a unipolar voltage varying with the load current. A sampler converts this voltage into a train of output pulses, generated at a rate proportional to the voltage level, whose count is numerically displayed as a measure of current consumption. The multivibrator, the demodulator, an intervening amplifier, the sampler and the display unit are serially energized with stabilized voltage and reduced current via a supply network connected across the load, this network including a ballast lamp in series with a Zener diode.

Abstract: An alternating current electric machine, namely, a small-power asynchronous otor, has two pairs of electric poles which can be supplied with either three-phase or single-phase alternating current. The machine is considerably simpler than classic motors, being provided with a stator having single cylinder poles and four or six coils. The stator is made from grain-oriented steel sheet.