| Conceptual Study of Permanent Magnet Machine Ship Propulsion Systems |
DEC 1977 |
118 pages |
| Authors:
R. A. Marshall; W. McMurray; E. Richter; H. F. Webster; W. Wyeth; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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 | This study examines the feasibility of incorporating permanent magnet machines into an a-c electric propulsion system for U.S. Navy ships. This systems concept is most attractive using conventional generators and permanent magnet motors. The cycloconverter subsystem is designed using advanced thyristors and can be either water or air cooled. The machine-cycloconverter, many-phase or parallel three-phase connection design offers a drive system with characteristics well matched to a ship propulsion system. ... |
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| Low Work Function Photocathode. |
JAN 1972 |
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| Authors:
Rowland W. Redington; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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 | Work performed on a program to develop high quantum yield photocathodes at near infrared wavelengths is summarized. Attempts to form thin films of Ga75In25As on GaAs substrates using vacuum deposition are discussed. Results on photoemission from GaSb covered with a thin (50A) surface layer of GaP are presented indicating that the surface work function cannot be lowered in this manner. Efforts to make thin (10 microns self-supporting films of GaAs ... |
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| Mercuric Oxide Battery for Transceiver Applications. |
30 OCT 1970 |
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| Authors:
William N. Carson Jr; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| This report describes research on the mercuric-oxide-cadmium galvanic cellsystem for possible use in a primary transceiver battery. The experimentalprogram included evaluation of binders, electron carriers, substrates, andstarting materials for pasted and pressed mercuric oxide and cadmium electrodes,methods of fabricating electrodes, evaluation of separator and electrolytematerials, evaluation of adhesive and sealant materials, and evaluation ofcase materials. The electrode is made by pressing a mix of cadmium oxide,nickel powder, and polyvinyl alcohol ... |
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| Research to Investigate Fundamental Magnetic Interactions in Selected Materials. |
APR 1970 |
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| Authors:
Joseph J. Becker; Robert E. Cech; Donald L. Martin; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| The report describes efforts, based on previous work, to improve the properties of cobalt-rare-earth powders and develop techniques for making useful permanent magnets from them. Guided by fundamental investigations of magnetic phenomena in these materials, development studies have led to techniques that enable the preparation of permanent magnets having energy products twice as high as anything that has previously been available, and intrinsic coercive forces several times as great, and ... |
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| Instrumentation for Predicting Bearing Damage. |
MAR 1970 |
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| Authors:
Bjorn Weichbrodt; Frank J. Bowden; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| This report describes the use of Mechanical Signature Analysis techniques for prediction of fatigue damage in large azimuth antenna bearings without interruption of antenna operation. Bearing areas of specific concern were the inner race, outer race, and rolling elements. The hardware used for this prediction consisted of six accelerometers and data processing equipment capable of sensing, recording, and analyzing vibration signals generated during bearing tests. Three bearings were tested, with ... |
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| Development of Solid and/or Liquid Metal Collectors for Acyclic Machines. |
27 FEB 1970 |
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| Authors:
Richard L. Rhodenizer; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| Current collectors for high power capacity acyclic machinery with superconductive fields are discussed in this report. It is found that liquid metal collectors offer superior performance characteristics for machines of this type. Consideration of solid collectors shows that the requirements of this application are beyond the present state of solid brush technology. The influence of ambient magnetic fields on the behavior of liquid metal collectors is analyzed. It is found ... |
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| Nickel Hydroxide Electrode Research. |
02 FEB 1970 |
2 pages |
| Authors:
H. A. Christopher; J. L. Weininger; J. G. Ruzzo; R. F. Thornton; P. J. Moran; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| The report discusses results of work performed to develop an improved nickel hydroxide electrode for use in rechargable alkaline electrodes for aerospace applications. Voltametric cycling studies have shown that all deliberate additions of cations (cobalt, zinc, cadmium, aluminum, and lithium) to the active material have a beneficial effect on the performance of the Ni(OH)2 electrode. None of these additives showed any negative effects. Cobalt and zinc were the most effective ... |
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| Determination of Wear Distributions. |
JUL 1969 |
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| Authors:
G. J. Hahn; R. E. Lee; W. J. MacFarland; R. A. Thompson; A. J. Orsino; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| A mathematical model for calculating wear in machine elements is proposed. The model is developed for conforming as well as Hertzian type contact and includes correction for the presence of elastohydrodynamic fluid film forces. Resulting formulations are shown compatible with the Linear Wear Model and employ the same wear coefficient K. Statistical analyses of wear data accumulated from available sources to permit the formulation of probabilistic statements in connection with ... |
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| Interrelation Between the Formation Conditions, Structure, and Physical Properties of Thin Films of Intermetallic Compounds. |
APR 1969 |
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| Authors:
James M. Lommel; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| The goal of this work was to obtain a better understanding between the relationship of the metallurgical structure to the magnetic and electrical properties of one such compound, 50 atom per cent (A/o) iron-50 A/o rhodium, in thin-film form. The types of magnetic phenomena that are presently being considered for use in large memory systems will be reviewed first, to provide background information for comparison with the properties obtainable with ... |
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| Gas Multiplication UV Sensors for Fire and Explosion Detection. |
31 JAN 1969 |
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| Authors:
Homer H. Glascock; Harold F. Webster; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| A highly developed titanium-fosterite tube envelope technology is being used to construct ultraviolet-sensitive gas multiplication phototube flame detectors which can operate in air over a wide range of temperatures (up to 1000F). A method for sealing sapphire windows to these tube envelopes has been developed. The flame detector tubes utilize single crystal molybdenum photocathodes and molybdenum anode-light collectors. Tests made in demountable gas-vacuum system established the gas combination, 99.5 percent ... |
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| RECHARGEABLE METAL-AIR CELL. |
AUG 1968 |
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| Authors:
Harold H. Hirsch; Wilem J. van der Grinten; William N. Carson; Paul J. Moran; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| As a consequence of the experimental work that has been carried out to evaluate the lead-air, the cadmium-air, and the zinc-air secondary battery systems, it has been determined that major emphasis would be focused on the cadmium-air battery development. Cadmium-air cells have been prepared and these cells have been tested and have shown 200 cycles of operation. Although a partial loss of capacity does occur on cycling, this can in ... |
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| Interaction Studies of Laser Beams Intersecting in an Active Medium (Crossed Beam Laser). |
31 JUL 1968 |
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| Authors:
David K. Duston; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| This is a semi-annual report on investigations of cross relaxation between neodymium ions and measurements of 4(I) sub 11/2 lifetime in laser glass. Work performed during the last six months is described. (Author) |
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| Mechanical Signature Analysis, a New Tool for Product Assurance and Early Fault Detection. |
JUN 1968 |
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| Authors:
Bjorn Weichbrodt; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| Sound and vibration signals have been useful for many years in judging the internal condition of machinery and structures. At the Research and Development Center, the interpretation and use of such signals is being developed from an art into a diagnostic technique. This technique, Mechanical Signature Analysis, uses external measurement of sound and vibration signals to diagnose internal condition or malfunctions and to detect incipient failure. Mechanical Signature Analysis has ... |
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| IMPROVED THERMOELECTRIC MATERIALS FOR MILITARY GROUND AIR CONDITIONERS. |
JUN 1968 |
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| Authors:
R. O. Carlson; L. F. Kendall; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| This program was a study of a new concept for reducing lattice thermal conductivity by scattering of phonons with paramagnetic ions having ground-state energy level separations comparable to the phonon energies. Lead telluride was chosen for this experiment because of its crystalline symmetry and because its chemical and electronic properties are relatively well-known. Thirteen different elements from the transition metal and rare earth groups were added to pure lead telluride, ... |
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| RECHARGEABLE METAL-AIR CELL. |
FEB 1968 |
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| Authors:
Harold H. Hirsch; Willem J. Van der Grinten; William N. Carson; Paul J. Moran; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| Experimental work was carried out to evaluate the lead-air, the cadmium-air, and the zinc-air secondary battery systems. In the lead-air battery, platinum could not be used at the cathode since its migration to the lead electrode causes severe gassing results from this. Redox cathodes have been investigated and Ferroin materials appear best. Zinc electrode utilizations of greater than 70% have resulted; however, relatively high self-discharge rates are encountered. The two-phase ... |
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| STUDY OF THE SURFACE FILMS OF GAS NUCLEI (AS RELATED TO CAVITATION AND TENSILE STRENGTH IN WATER) PART IV. DISSOLVING OF GAS NUCLEI IN TURBULENT FLOW. |
DEC 1967 |
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| Authors:
Leslie H. Bernd; GENERAL ELECTRIC CO SCHENECTADY NY RESEARCH AND DEVELOPMENT CENTER
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| This paper is a report of an investigation of the dissolving of gas nuclei (small gas bubbles) in turbulently flowing water in a pipe. The rate of dissolving is important in a circulating water tunnel because it determines whether or not cavitation produced nuclei reach a small enough size to produce tensile strength in the water, increase the cavitation inception level, and affect the results of a cavitation test. The ... |
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