GB821617A - Improvements in getter structures and methods of making them - Google Patents

Improvements in getter structures and methods of making them

Info

Publication number
GB821617A
GB821617A GB34438/55A GB3443855A GB821617A GB 821617 A GB821617 A GB 821617A GB 34438/55 A GB34438/55 A GB 34438/55A GB 3443855 A GB3443855 A GB 3443855A GB 821617 A GB821617 A GB 821617A
Authority
GB
United Kingdom
Prior art keywords
aluminium
barium
crucible
evacuated
argon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB34438/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB821617A publication Critical patent/GB821617A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering

Landscapes

  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

A getter comprises an aluminium sheath enclosing a core which can be an alloy containing an alkaline earth metal. In an example the core consists of an alloy of barium of 99% purity and aluminium of 99.6% purity in a ratio of 99 to 1. The barium is weighed in paraffin oil and rinsed in toluene before being placed in a crucible with the aluminium. The crucible is placed in a vacuum furnace which is evacuated to a low pressure to remove barium reactive gases. The charge is heated until evolution of gases ceases and the furnace flushed out with argon. The pressure of argon is adjusted to about 150 mms. and the charge melted and then poured into an aluminium sheath fitted into a mould and allowed to cool, the pouring and cooling being performed in a surround which is filled with an inert gas or is evacuated.
GB34438/55A 1954-12-29 1955-12-01 Improvements in getter structures and methods of making them Expired GB821617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US821617XA 1954-12-29 1954-12-29

Publications (1)

Publication Number Publication Date
GB821617A true GB821617A (en) 1959-10-14

Family

ID=22169433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34438/55A Expired GB821617A (en) 1954-12-29 1955-12-01 Improvements in getter structures and methods of making them

Country Status (1)

Country Link
GB (1) GB821617A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0511177A1 (en) * 1991-04-16 1992-10-28 SAES GETTERS S.p.A. A protective vessel for a getter material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0511177A1 (en) * 1991-04-16 1992-10-28 SAES GETTERS S.p.A. A protective vessel for a getter material

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