Method of making a double ended lamp

Details Method of making a double ended lamp Method of making a double ended lamp

1991-03-21

1992-07-07

Rowan, Kurt

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 32, H01J 918, H01J 932

Patent

active

051278642

ABSTRACT:
A method of making a double ended lamp having a tubular envelope, a filament, and button contacts at opposite ends of the lamp is disclosed. By first forming a metallurgical bond between the button contacts, and a lead rods, a high quality bond may be formed that does not cause the lead rod to become embrittled. The button contact and lead rod assembly is then, if not already, incorporated into the filament assembly. The filament assembly is then accurately positioned in a tubular envelope and sealed in place. The lamp may then be finished by filling, coating, insulating, and so on in a standard fashion. The button contact as a result is accurately positioned with respect to the envelope, and is unlikely to separate from the lead because of crimp failure, or embrittled rod fracture.

REFERENCES:
patent: 2191346 (1940-02-01), Greiner
patent: 3274426 (1966-09-01), Scoledge et al.
patent: 3785019 (1974-01-01), Chiola et al.
patent: 4132922 (1979-01-01), Newton et al.

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