Low-pressure arc discharge lamp having a common passageway and m

Details Low-pressure arc discharge lamp having a common passageway and m Low-pressure arc discharge lamp having a common passageway and m

1986-02-24

1987-03-10

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Combined, e.g., with shaping of lamp or device envelope

65 54, 65 56, H01J 924, H01J 926

Patent

active

046488502

ABSTRACT:
A method of manufacturing a low-pressure arc discharge lamp formed by interconnecting two or more adjacent glass discharge tubes. A hermetically sealed common passageway between the two adjacent tubes is formed by positioning the tubes in a contiguous relationship to define at least one common location of contact. Heating a preselected area of the internal surface of each of the tubes relative to the common location of contact to soften the glass to the extent a common passageway is defined between the tubes. Thereafter, separating the tubes a predetermined distance while the glass is in a softened state to stretch the softened glass, thereby extending the common passageway between the tubes. The technique may be applied to multiple tube assemblies precoated with a luminescent layer by alternating the end of the tube at which the passageway is formed. Once the tubes are joined, they may be processed by current manufacturing techniques to produce a low-pressure arc discharge lamp.

REFERENCES:
patent: 2624978 (1953-01-01), Hohmann
patent: 2624979 (1953-01-01), Clever et al.
patent: 3501662 (1970-03-01), Plagge
patent: 4324447 (1982-04-01), Van der Wolf et al.
patent: 4374340 (1983-02-01), Bouwknegt et al.
patent: 4530710 (1985-07-01), Dullea et al.
patent: 4545774 (1985-10-01), Van Gils et al.

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