Accession Number : AD0453456


Title :   GLASS-HOLDER RELIABILITY STUDY.


Descriptive Note : Final rept., 1 Apr 63-30 Sep 64,


Corporate Author : BLILEY ELECTRIC CO ERIE PA


Personal Author(s) : Wolfskill,J M ; Mouck,Robert


Report Date : 30 Sep 1964


Pagination or Media Count : 32


Abstract : A one-year reliability study on glass crystal holders HC-26/U, HC-27/U, and HC-30/U was conducted. Sealed holders were examined for cracks, subjected to thermal shock, and checked for vacuum retention at monthly intervals. Yield figures and findings from the monthly tests are presented by holder type, by supplier, and by mode of failure. Reliability curves are also presented, showing the failure rates in percent per thousand hours by holder type and supplier. HC-30's maintained a 0% failure rate throughout, HC-27's averaged about 5% loss per thousand hours at the beginning but reached less than 1% loss by the end, while HC-26's ranged between 3% and 4% loss per thousand hours throughout the one-year study. (Author)


Descriptors :   *CRYSTAL HOLDERS , RELIABILITY , GLASS , THERMAL STRESSES , SEALS(STOPPERS) , FAILURE(MECHANICS)


Distribution Statement : APPROVED FOR PUBLIC RELEASE