The Technique of Glass-to-Metal Sealing with Special Reference to Vacuum-Tight Seals

JSGT 1946 V30 T067-T089

 It is the purpose of this short survey to give an account of the writer's experience in connection with the production of glass-to-metal seals ranging from wire seals used in pinch type lead-in arrangements to larger cylindrical seals of some 4 inches diameter. First the various forms of wire seals up to 2·5 mm diameter will be dealt with. The necessity of a reasonable expansion match between the metal and the glass needs no further discussion other than to say that in the writer's experience, with close control of the sealing operation, quite considerable tolerance is permissible in the materials selected. More will be said later on the control of the sealing operation during routine production.

 A. G. Long