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  • 1
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    Unknown
    Tracking falling objects (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Moving lens follows movement of object accelerated by gravity. Lenses and mirrors maintain constant magnification regardless of distance between moving optical carriage mechanism and fixed telescope. Device tracks objects up to 2 cm in diameter over vertical distance of 2 m.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-14813 , NASA Tech Briefs (ISSN 0145-319X); 5; 3; P. 306
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Vapor Degreasing Of A Large Tank (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Vapor degreasing procedure provides for removal of relatively non-volatile oils and greases from insides of large vessels. Solvent refluxed to concentrate less volatile contaminants at bottom. Procedure ensures required degrees of cleaniness in high-purity chemical processing and high-vacuum processing vessels. Devised for cleaning complexly-shaped stainless-steel vacuum chamber containing numerous difficult-to-clean features like screw holes and abutting surfaces. Solvent can be chlorofluorocarbon, if means provided to recover most and minimize portion escaping into air. Alternatively, hydrocarbon or other flammable solvent used, provided flammability tolerable in particular application.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-19258 , NASA Tech Briefs (ISSN 0145-319X); 19; 4; P. 48
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Collectors Of Airborne And Spaceborne Particles (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Brushlike collectors capture samples of dust and other particles in space vacuum or air for optical, scanning-electron-microscope, and/or x-ray analysis. Gently decelerates particles without damaging them, minimizing tendency of some particles to rebound. Depending on design of specific collector of this type, it captures particles ranging upward in size from fractions of micrometer to few micrometers.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-18183 , NASA Tech Briefs (ISSN 0145-319X); 15; 9; P. 74
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Compound Walls For Vacuum Chambers (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Proposed compound-wall configuration enables construction of large high-vacuum chambers without having to use thick layers of expensive material to obtain necessary strength. Walls enclose chambers more than 1 m in diameter and several kilometers long. Compound wall made of strong outer layer of structural-steel culvert pipe welded to thin layer of high-quality, low-outgassing stainless steel.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-17039 , NASA Tech Briefs (ISSN 0145-319X); 12; 2; P. 48
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Polarization-Rotating Sensors Connected To Optical Fibers (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Proposed optoelectronic sensor system includes polarization-rotating sensing elements interrogated by polarized light transmitted to and from sensing elements along optical fibers. Polarization of light altered by combinations of inherent birefringence, stress-induced birefrigence, and Faraday rotation. Advantages include: light weight, fast response, immunity to electromagnetic interference at radio and lower frequencies, and no need to supply electrical power to sensing elements.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-17591 , NASA Tech Briefs (ISSN 0145-319X); 16; 5; P. 64
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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