Accession Number : AD0282892

Title :   PRODUCTION ENGINEERING MEASURE FOR POLYOPTIC SEALING OF HYDROGEN THYRATRON TUBES

Corporate Author : TUNG-SOL ELECTRIC INC LIVINGSTON N J CHATHAM ELECTRONICS DIV

Personal Author(s) : DIXON,G.H.

Report Date : 28 AUG 1962

Pagination or Media Count : 1

Abstract : Polyoptic Sealing: During the observations made to determine the influence of polyoptic fit on exhaust pressure, it was found that cleanliness of fit and intimacy were considerably more important to the vacuum tightness than the perfection of spherical shapes. That is between 8 fringes large and 5 fringes small button spherical diameter. The polyoptic assembly procedure has been changed such that an intermolecular bond must be achieved during assembly, prior to sealing. Life Testing Polyoptic Tubes: Preliminary life testing of lot B, sealed during this quarter, indicates a general reduction in life from what had previously been considered as normal life expectancy for polyoptic sealing. No seal failures were observed. Comparative Life Testing Of Flame Sealed Tubes: Due to the fact that only a limited quantity of tubes were tested for 500 hours, no conclusions can be drawn at this time. (Author)

Descriptors :   *GLASS SEALS, *MINIATURE ELECTRON TUBES, *THYRATRONS, DEGASIFICATION, HYDROGEN, LIFE EXPECTANCY, PRODUCTION, SEALING COMPOUNDS, SEALS (STOPPERS), TESTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE