Electric lamp or space discharge component or device manufacturi – Process – Generating gas or vapor within an envelope – or coating by...
Patent
1981-05-08
1983-10-04
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
Generating gas or vapor within an envelope, or coating by...
445 31, 445 55, 313481, 313551, 417 48, H01J 920
Patent
active
044076576
ABSTRACT:
In a method of manufacturing a picture display tube a gettering device is used which includes a first metal holder (1, 20) and a second metal holder (3, 28). A source (2, 21) of evaporable gettering metal is accommodated in the first metal holder (1, 20) from which the gettering metal can be released by inductive heating. A gas source (6) including a material having a comparatively high decomposition temperature, which releases gas upon heating, is accommodated in the second metal holder. The second metal holder is connected to an outer surface (7, 30) of the first metal holder in such manner that the second metal holder forms an electric shunt for part of the induction current generated in the first metal holder by the inductive heating. During the inductive heating the temperature of the second metal holder and its contents lead increases faster than that of the contents of the first metal holder and the gas-releasing material (6) begins releasing its gas before the gettering metal begins to evaporate from the source (2, 21) of gettering metal.
REFERENCES:
patent: 3195716 (1965-07-01), Porta
patent: 3669567 (1972-06-01), Porta
patent: 3927953 (1975-12-01), Zucchinelli
patent: 3979166 (1976-09-01), Zucchinelli
Kraus Robert J.
Ramsey Kenneth J.
U.S. Philips Corporation
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