Glass manufacturing – Processes – Fusion bonding of glass to a formed part
Patent
1985-07-18
1986-09-16
Lindsay, Robert
Glass manufacturing
Processes
Fusion bonding of glass to a formed part
65 34, 65 5925, 65 5934, 65110, 65139, 65140, 65154, 65155, C03B 2702
Patent
active
046120297
ABSTRACT:
A method and apparatus for assembling and fusing glass to metal in a glass-metal electrical component is disclosed. The component includes a metallic shell formed with upper and lower cylindrical recesses connected together by longitudinal passages, a pair of metal rings and plural metal pins assembled to define electrical feed-throughs. The component parts are assembled on a fixture having a sleeve-like projection and a central mounting projection establishing concentric nesting surfaces to which the metal rings are slip-fitted in concentric alignment with each other spaced from sidewalls of the lower recess. The pins are in electrical contact with the metal rings. A glass pre-form is seated within the upper recess. The assembled structure is heated to a temperature sufficient to melt the glass pre-form which flows under gravity through the passages into the lower recess to provide an insulative seal between the metal parts. The gravity flow of glass is assisted by applying vacuum to the lower recess, ensuring that all spaces between the metal parts are filled with sealing glass without formation of bubbles.
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Kramer Daniel P.
Massey Richard T.
Chafin James H.
Hightower Judson R.
Lindsay Robert
Sopp Albert
The United States of America as represented by the United States
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