Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1992-12-17
1994-02-15
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
445 40, H01J 938
Patent
active
052862275
ABSTRACT:
An arc tube having a closed glass bulb having no broken-off portion, and a method of manufacturing the arc tube. A glass bulb is formed on a glass tube substantially at the middle. An electrode assembly is inserted into one end portion of the glass tube, and the one end portion is closed by pinch-sealing. A light emitting material is supplied into the glass bulb through the other end portion of the glass tube, another electrode assembly is inserted into the other end portion, and the latter is closed by pinch-sealing. Since the closed glass bulb has no broken-off portion, the arc tube is free from the difficulty that the distribution of light is adversely affected. Moreover, in manufacturing the arc tube of the invention, it is unnecessary to connect an exhaust tube to the glass tube. Therefore, the number of manufacturing steps is small, and the arc tube can be manufactured with ease.
REFERENCES:
patent: 4389201 (1983-06-01), Hansler et al.
patent: 4509928 (1985-04-01), Morris et al.
patent: 5108333 (1992-04-01), Heider et al.
patent: 5133682 (1992-07-01), Gilligan et al.
Fukai Kunio
Irisawa Shinichi
Nagasawa Masakazu
Numajiri Yasuyoshi
Koito Manufacturing Co. Ltd.
Ramsey Kenneth J.
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