Production of ceramic tubes for metal halide lamps

Details Production of ceramic tubes for metal halide lamps Production of ceramic tubes for metal halide lamps

1997-08-26

2000-02-22

Patel, Nimeshkumar D.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 22, H01J 900

Patent

active

060273895

ABSTRACT:
A process to produce a ceramic tube for a metallic halide lamp, comprising the steps of forming an integrally molded body composed of an electrode member-inserting portion and an annular portion located around an outer periphery of the electrode member-inserting portion, inserting the annular portion of the integrally molded body into an open end portion of a molded cylindrical tubular body in a state that each of the integrally molded body and the molded tubular body is used as molded or after being calcined, thereby forming an assembled body, and firing the assembled body, thereby forming an integrally fired body composed of the electrode member-inserting portion and the annular portion, whereas the annular portion and the tubular body are sintered to each other by firing in a state that radial press fitting forces act between the annular portion and the tubular body, the ceramic tube being constituted by the cylindrical tubular body containing a discharging space with open end portions at both ends thereof, the annular portions provided at the open end portions of the tubular body, and electrode member-inserting portions fixed at the opposite ends of the tubular body through the annular portions, respectively.

REFERENCES:
patent: 3564328 (1971-02-01), Bagley
patent: 4155758 (1979-05-01), Evans et al.
patent: 4503356 (1985-03-01), Kobayashi et al.
patent: 4800320 (1989-01-01), Kajihara et al.
patent: 5468168 (1995-11-01), Balaschak et al.

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