FR482397A - Procédé pour faire le vide dans les ampoules de lampes à incandescence, ou autres lampes électriques brulant en vases hermétiquement clos
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Procédé pour faire le vide dans les ampoules de lampes à incandescence, ou autres lampes électriques brulant en vases hermétiquement clos
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H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
H01K1/56—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering characterised by the material of the getter
FR482397A1915-08-051916-07-28Procédé pour faire le vide dans les ampoules de lampes à incandescence, ou autres lampes électriques brulant en vases hermétiquement clos
ExpiredFR482397A
(fr)
Appareil destiné à mouler les couvercles en verre pour récipients hermétiquement clos tels qu'ampoules, tubes, etc., de lampes électriques à incandescence et appareils similaires