Methods for mounting filaments in tubular incandescent lamp caps

Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly

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445 3, 445 32, H01J 926

Patent

active

052096890

ABSTRACT:
A method for mounting a filament in a double ended incandescent lamp capsule. A filament assembly, including a filament, filament supports attached to each end of the filament and an external lead connected to each filament support, is located in a tubular lamp envelope. The position of the filament relative to the lamp envelope is determined, and the filament is moved to a predetermined position relative to the lamp envelope, if necessary. Then, the lamp envelope is heated sufficiently to cause the lamp envelope to deform into contact with at least one of the filament supports so as to securely anchor the filament support. The heating of the lamp envelope in regions of the filament supports can be performed simultaneously or at different times. One or both filament supports can be anchored by the tacking process.

REFERENCES:
patent: 3151922 (1964-10-01), Preschel et al.
patent: 3295016 (1966-12-01), Ayres et al.
patent: 3462209 (1969-08-01), Fridrich
patent: 3759601 (1973-09-01), Bonazoli et al.
patent: 4509928 (1985-04-01), Morris et al.

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