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  • MACHINE ELEMENTS AND PROCESSES  (5)
  • Inorganic Chemistry  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Neuere Ergebnisse der CarotinoidforschungHerrn Professor Dr. R. Kuhn zum 60. Geburtstag gewidmet. (1960)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 93 (1960), S. 2951-2965 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eine ganze Reihe von Carotinoid-Aldehyden mit 20-40 C-Atomen wurden in Naturprodukten aufgefunden, dazu Mono- und Bisdehydrolycopin.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19600931228
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der höhern Nickelhydroxyde; die Oxydation von NickelhydroxydProfessor Wilhelm Klemm zum 60. Geburtstage gewidmet (1956)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 283 (1956), S. 88-95 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das von GLEMSER und EINERHAND als Ni3O2(OH)4 formulierte höhere Nickelhydroxyd besitzt eine ungeordnete Schichtenstruktur mit rhombisch deformierten Schichten und einem mittleren Abstand der Nickelionen, der zwischen demjenigen von Ni(OH)2 und β NiOOH liegt. Sein Homogenitätsbereich erstreckt sich bis zu der Zusammensetzung NiOOH.Die Oxydation von Nickelhydroxyd erfolgt streng topochemisch, dabei kann unter Erhaltung des Gitters die Zusammensetzung unter Umständen NiOOH werden. Nebstdem findet Kontraktion der Schichten unter Bildung der Gitter von Ni3O2(OH)4 und evtl. β NiOOH statt.Die Oxydationsprodukte von Nickelhydroxyd sind bei gleicher Zusammensetzung verschieden von den durch Oxydation von Nickelionen in alkalischem Milieu erhaltenen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19562830111
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Butylirung des Anilins (1881)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 14 (1881), S. 1472-1475 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.188101401308
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  • 4
    Electronic Resource
    Electronic Resource
    Ueber Butylirung des Anilins (1881)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 14 (1881), S. 2186-2188 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.188101402144
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  • 5
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    Meeting the challenge of a 50000-hour-life-time requirement (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Space mission requirements for the 70's have established a 50,000-hour-lifetime challenge for the mechanisms designer. This challenge may be met by two approaches: (1) development of new materials for wear-prone elements, and (2) design innovation of new electromechanical devices that do not include mechanical wear-prone components. Present state-of-the-art materials require restricted operation regarding load, speed, and power for gears, bearings, and brush-slipring components. These restrictions are discussed, and methods of improvement are suggested. The design-innovations approach is discussed and is illustrated by the design of an experimental magnetically suspended motor.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: 5th Aerospace Mech. Symp.; p 159-164
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    A review of the technology of noncontacting systems (1973)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Advanced components are the fundamental building blocks of advanced systems and spacecraft. Non-contacting elements, including magnetic bearings, brushless and ironless armature motors, rotary transformers and encoders, are discussed. Most of the information presented in this paper has been generated from a continuing program of component development. The aim of this paper is to identify some of the important design features and provide a perspective on the state of development reached to date.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: The 8th Aerospace Mech. Symp.; p 117-130
    Format: application/pdf
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  • 7
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    Development of a sealed brushless dc motor (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Sealed brushless dc motor using photoelectronic commutation - spacecraft component
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TN-D-2819
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Magnetic bearings for spacecraft (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Magnetic bearings have been successfully applied to motorized rotor systems in the multi-kilogram range, at speeds up to 1200 radians per second. These engineering models also indicated the need for continued development in specific areas to make them feasible for spacecraft applications. Significant power reductions have recently been attained. A unique magnetic circuit, combining permanent magnets with electromagnetic control, has a bidirectional forcing capability with improved current sensitivity. The multi-dimensional nature of contact-free rotor support is discussed. Stable continuous radial suspension is provided by a rotationally symmetric permanent magnet circuit. Two bearings, on a common shaft, counteract the normal instability perpendicular to the rotational axis. The axial direction is servoed to prevent contact. A new bearing technology and a new field of application for magnetics is foreseen.
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: NASA-TM-X-66111 , X-721-72-56
    Format: application/pdf
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  • 9
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    Meeting the challenge of a 50,000-hour-lifetime requirement (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Materials and noncontacting design for 50,000 hour lifetime electromechanical components, noting magnetically suspended motor
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: AEROSPACE MECHANISMS SYMPOSIUM; Jun 15, 1970 - Jun 16, 1970; NASA GODDARD SPACE FLIGHT CENTER, GREENBELT, MD; UNITED STATES
    Format: text
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