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  • 1975-1979  (3)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Extending minimal varieties (1975)
    Springer
    Inventiones mathematicae 28 (1975), S. 209-226 
    Details
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01425557
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    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Single-axle, double-axis solar tracker (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Solar concentrator tracking mechanism consisting of angular axle and two synchronized drive motors, follows seasonal as well as diurnal changes in earth's orientation with respect to incoming sunlight.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-23267 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Mount for continuously orienting a collector dish in a system adapted to perform both diurnal and seasonal solar tracking (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A collector dish is continuously oriented toward the sun in a system adapted to perform both diurnal and seasonal solar tracking. The mount is characterized by a rigid, angulated axle having a linear midportion supporting a collector dish, and oppositely extended end portions normally related to the midportion of the axle and received in spaced journals. The longitudinal axis of symmetry for the midportion of the axle is coincident with a seasonal axis while the axes of the journals are coincident with a diurnal axis paralleling the earth's polar axis. Drive means are provided for periodically displacing the axle about the diurnal axis at a substantially constant rate, while other drive means are provided for periodically indexing the dish through 1 deg about the seasonal axis whereby the position of the dish relative to the axle is varied for accommodating seasonal tracking as changes in the angle of inclination of the polar axis occurs.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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