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11. |
Polonium Alloy for Spark Plug Electrodes |
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Journal of Applied Physics,
Volume 11,
Issue 4,
1940,
Page 291-299
J. H. Dillon,
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摘要:
A method of improving the starting characteristics of spark plugs involving the use of polonium is described. Results of experiments concerned with the measurement of the apparent breakdown voltage under laboratory conditions and the starting characteristics of spark plugs in internal combustion motors at low temperatures are given. These results indicate that the use of polonium in commercially practical concentrations in standard electrode alloys definitely improves the starting performance of spark plugs. Large scale methods of extraction of polonium from residues of a radium refinery and the method of introducing polonium into the electrode alloy are to be discussed in a subsequent article.
ISSN:0021-8979
DOI:10.1063/1.1712774
出版商:AIP
年代:1940
数据来源: AIP
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12. |
Wave Propagation in Shearing Quartz Oscillators of High Frequency |
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Journal of Applied Physics,
Volume 11,
Issue 4,
1940,
Page 299-300
Edward W. Sanders,
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PDF (127KB)
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摘要:
Experimental verification of a theory of edge grinding is given by demonstrating the presence of elastic waves along theXaxis of a low frequency‐temperature coefficient quartz plate.
ISSN:0021-8979
DOI:10.1063/1.1712775
出版商:AIP
年代:1940
数据来源: AIP
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