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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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At least 811 records · Page 45
All sourcesNASA NTRSDOE OSTI
NASA NTRS1970

Low-cost orbiting grinder for cutting ducts

Low-cost, portable machine cuts ducts made from heat-treated alloys. An abrasive wheel, powered by a high-speed air motor mounted on an expandible plug against the inner wall of the duct, gives precise cutting.

Lang, E. J.↗
NASA NTRS1970

Economic gas chromatograph system for subambient pressure gas sampling

Gas chromatograph sampling system consists of a manifold with a gas-sample valve, a minimum-volume pressure transducer with a portable monitor, a vacuum-source valve, and a sample inlet valve. Increased accuracy of analysis is obtained by better control of sample size.

Mitchell, S. M.↗
NASA NTRS1970

Volumetric leak detector

Portable volumetric leak detector measures leakage in the range of 5 to 40 cc/hr. The detector, a fluid displacing apparatus, measures the leakage of gases across valve seats and checks components and systems of components independent of size in relatively short periods of time.

Elser, M. J.↗
NASA NTRS1970

Universal router concept

Portable universal router can cut holes of large diameter and irregular shapes, machine recesses, and drill holes with certain edge-distance limitations. Rectangular and round holes may be cut without a template.

Pesch, W. A.↗
NASA NTRS1970

Laser beam hydrocarbon detector

Portable instrument passes light from helium-neon laser at a wavelength of 3.39 microns through the atmosphere being monitored and measures attenuation of the laser beam. Since beam attenuation is due almost exclusively to absorption of radiation by hydrocarbons, a quantitative measure of their concentration is available.

Beam, B. H.↗
NASA NTRS1971

Thin spray film thickness measuring technique

Thin spray film application depths, in the 0.0002 cm to 0.002 cm range, are measured by portable, commercially available, light density measuring device used in conjunction with glass plate or photographic film. Method is automated by using mechanical/electrical control for shutting off film applicator at desired densitometer reading.

Jones, G.↗
NASA NTRS1971

Wein bridge oscillator circuit

Circuit with minimum number of components provides stable outputs of 2 to 8 volts at frequencies of .001 to 100 kHz. Oscillator exhibits low power consumption, portability, simplicity, and drive capability, it has application as loudspeaker tester and audible alarm, as well as in laboratory and test generators.

Lipoma, P. C.↗
NASA NTRS1971

Electrolysis cell functions as water vapor dehumidifier and oxygen generator

Water vapor is absorbed in hygroscopic electrolyte, and oxygen generated by absorbed water electrolysis at anode is added simultaneously to air stream. Cell applications include on-board aircraft oxygen systems, portable oxygen generators, oxygen concentration requirements, and commercial air conditioning and dehumidifying systems.

Clifford, J. E.↗