Abstract:
A METHOD OF MAKING A CERAMIC LIGHT BULB OR OTHER ELECTRICAL DEVICE HAVING A CERAMIC ENVELOPE PORTION FORMED OF A TRANSLUCENT CERAMIC MATERIAL AND A METAL CLOSURE MEMBER. THE CERAMIC MATERIAL IS METALIZED IN DESIRED AREAS. THE METAL CLOSURE MEMBER IS ASSEMBLED WITH THE CERAMIC ENVELOPE AND A FILAMENT IS MOUNTED WITHIN THE ENVELOPE WITH OPPOSITE ENDS IN CONTACT WITH METALIZED PORTIONS OF THE ENVELOPE. BRAZING METAL IS PLACED AT ALL CONTACT AREAS BETWEEN THE ENVELOPE AND THE CLOSURE MEMBER. THE ASSEMBLY IS THEN HEATED IN A FURNACE AT A TEMPERATURE AND TIME SUFFICIENT TO BRAZE THE ASSEMBLY INTO AN HERMETICALLY SEALED DEVICE.
Abstract:
A method of hermetically sealing a wire, such as a lead-in conductor for an electrical device, in a metal tube in which the wire is passed through the tube, a portion of the tube constricted about the wire, and forcing the wire into one end of the tube which causes the tube to bulge out and the wire thickened beyond the initial diameter of the tube.