Low-pressure arc discharge lamp having parallel discharge tubes

Details Low-pressure arc discharge lamp having parallel discharge tubes Low-pressure arc discharge lamp having parallel discharge tubes

1983-10-24

1985-07-23

Lindsay, Robert

Glass manufacturing

Processes

Fusion bonding of glass to a formed part

65 54, 65 55, 313493, 313634, 445 26, C03D 3306, H01J 900

Patent

active

045307105

ABSTRACT:
A method of manufacturing a low-pressure arc discharge lamp formed by interconnecting two or more parallel glass discharge tubes, each tube being sealed at one end. A hermetically sealed arc-containing channel between the two adjacent tubes is formed by heating opposing sections of the two tubes to soften a first and second site on each of the respective tubes. Then, one of the tubes is pressurized until a glass bubble forms from the softened site; the bubble is blown toward and onto the other tube about the softened site thereof. The pressure in the first tube is then released, and pressure is applied in the second tube to form a second glass bubble which fuses with the first glass bubble and bursts into the first tube thereby forming the sealed arc-containing channel between the two tubes. The technique may be applied to multiple tube assemblies by alternating the end of the tube at which the joint 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: 2000560 (1935-05-01), Eitel et al.
patent: 2683333 (1954-07-01), Canicoba
patent: 2822646 (1958-02-01), Krefft
patent: 3114619 (1963-12-01), Nitsche et al.
patent: 3212870 (1965-10-01), Condon
patent: 3501662 (1970-03-01), Plagge
patent: 4324447 (1982-04-01), van der Wolf et al.
patent: 4481442 (1984-11-01), Albrecht et al.

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