Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1979-02-13
1982-03-09
Demeo, Palmer C.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313493, H01J 6130, H01J 6144
Patent
active
043191622
ABSTRACT:
An efficient fluorescent lamp of high brightness and compact size is provided by forming the envelope from vitreous tubing that is bent into three U-shaped sections which are disposed in mutually perpendicular planes and define a single convoluted discharge channel. The U-shaped sections are so oriented that the legs of the U's are disposed in quadrangular columnar array with the ends of the tubing located adjacent one another and opposite one of the U-bends. Conventional electrode-stem assemblies are sealed into the ends of the bent tubing and the sealed legs are coupled to each other and the proximate U-bend by brace means which rigidifies the multi-section envelope. An efficient method of manufacturing the envelope employing a pair of arcuate molding components and two bending operations that form the three U-bends with only a single tibe-heating operation is also disclosed.
REFERENCES:
patent: 2652483 (1953-09-01), Laidig et al.
patent: 3602755 (1971-08-01), Hoeh
patent: 3858082 (1974-12-01), Thornton, Jr.
patent: 4065688 (1977-12-01), Thornton
patent: 4095135 (1978-06-01), Yamazaki et al.
"Same Light Output for One Third of the Energy", from Engineering Materials and Design, vol. 20, No. 6, p. 39, Jun. 1976.
Buleza D. S.
DeMeo Palmer C.
Westinghouse Electric Corp.
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