Means for obtaining or maintaining the desired pressure within the vessel

Full Title

Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps > Means for obtaining or maintaining the desired pressure within the vessel

Child Classifications

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• H01J 7/16 Means for permitting pumping during operation of the tube or lamp
• H01J 7/18 Means for absorbing or adsorbing gas, e.g. by gettering
• H01J 7/20 Means for producing, introducing, or replenishing gas or vapour during operation of the tube or lamp
• H01J 7/22 Tubulations therefor, e.g. for exhausting; Closures therefor