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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Cable connector is developed in which each pair of contact elements is isolated by plastic cells and the mating interface is sealed by an elastic gasket. So insulated, the connector may be operated under high vacuum conditions at voltages up to 600 V ac without electrical leakage or intercontact ionization.
Limiting circuit protects the main power supply of electronic modules and limits the current drawn by each module should a short circuit occur. It limits current within one mA when used with direct current of either polarity, or with pulse or ac power sources from direct current to 100 kHz.
Signal voltage resulting from the disturbance of an electromagnetic field within the volume of a sensitive area is compared with a reference ac voltage for polarity information, which identifies the material. System output amplitude and polarity indicate approximate size and type of metal, respectively.
Circuit breaker consists of a preset current amplitude sensor, and a lamp-photo-resistor combination in a feedback arrangement which energizes a power switching relay. The ac input power is removed from the load at predetermined current amplitudes.
Circuits and performance of pulse width modulated dc to ac static inverter
Electromagnetic measurement of power efficiency in ac generators
This design survey summarizes the history of the Orbiting Geophysical Observatories' (OGO) Attitude Control Subsystem (ACS) from the proposal phase through current flight experience. Problems encountered in design, fabrication, test, and on orbit are discussed. It is hoped that the experiences of the OGO program related here will aid future designers.
Steady state EPR signal I kinetic behavior in wild type Chlamydomonas reinhardtii and in mutant strain AC-206 lacking cytochrome 53
Pulsed energy power system for application of combustible gases to turbine controlling ac voltage generator
Demodulator for simultaneous demodulation of two modulating ac signal carriers close in frequency
Frequency control network for current feedback oscillators converting dc voltage to ac or higher dc voltages
Papers presented at plasma physics conference including plasma theory and generation, ac and dc plasma acceleration, plasma-wave interaction, and plasma magnetohydrodynamics and diagnostics
Ear oximeter for monitoring blood oxygenation and pressure, pulse rate, and pressure pulse curve, using dc and ac amplifiers
Cs vapor thermionic diodes with low temperature dual mode characteristics applicable as switching elements in DC to AC power conditioner
Voltage induction in superconductors by superimposed AC and DC magnetic fields
STOL aircraft electric power variable frequency generation and high voltage DC distribution with secondary square wave AC distribution
Plasma wave instrument for measuriing AC electrical and magnetic field levels in outer planets missions
Thermal feedback modification of Si JFETs AC and DC characteristics at low operating temperatures