Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For filament
Patent
1987-03-16
1988-08-23
Moore, David K.
Electric lamp and discharge devices
With support and/or spacing structure for electrode and/or...
For filament
313273, 313274, 313279, 313579, H01J 6110
Patent
active
047663391
ABSTRACT:
An improved electric lamp including an envelope having a sealed end portion, a coiled tungsten filament structure within the envelope, a pair of tungsten lead-in conductors sealed within the envelope and coupled to the filament structure, a first insulative (e.g., quartz) bridge disposed within the envelope between the filament and the envelope's sealed end, and a pair of support wires which also extend within the envelope adjacent the lead-in conductors respectively, to provide support for the contained filament structure. The improvement comprises reinforcement means in the form of a pair of platinum-clad molybdenum wire members each having a smaller diameter than that of the lead-in conductors and support wires, each of these wire members being welded to a respective pair of said conductor and support wire elements at a location between the lower bridge and sealed end. The wire members may be of curvilinear (e.g. U-shaped) configuration or of straight configuration, or a combination of both.
REFERENCES:
patent: 3781582 (1973-12-01), De Caro
patent: 4032809 (1977-06-01), Corth
patent: 4366411 (1982-12-01), Robinson
Berry William L.
Coney Robert S.
Senft Stephen P.
Fraley Lawrence R.
GTE Products Corporation
Moore David K.
Powell Mark R.
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