GB537762A - Improvements in and relating to electric discharge devices - Google Patents
Improvements in and relating to electric discharge devicesInfo
- Publication number
- GB537762A GB537762A GB6190/40A GB619040A GB537762A GB 537762 A GB537762 A GB 537762A GB 6190/40 A GB6190/40 A GB 6190/40A GB 619040 A GB619040 A GB 619040A GB 537762 A GB537762 A GB 537762A
- Authority
- GB
- United Kingdom
- Prior art keywords
- envelope
- header
- tube
- plate
- valve
- 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
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
- H01J7/186—Getter supports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
- H01J5/20—Seals between parts of vessels
- H01J5/22—Vacuum-tight joints between parts of vessel
- H01J5/28—Vacuum-tight joints between parts of vessel between conductive parts of vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0033—Vacuum connection techniques applicable to discharge tubes and lamps
- H01J2893/0037—Solid sealing members other than lamp bases
- H01J2893/0044—Direct connection between two metal elements, in particular via material a connecting material
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
537,762. Thermionic valves. BRITISH THOMSONHOUSTON CO., Ltd. April 5, 1940, No. 6190. Convention date, April 7, 1939. [Class 39 (i)] [Also in Group. XXII] In a thermionic valve with a metal envelope 10 which is closed by a metal header 11 carrying the electrode structure, the joint between the envelope 10 and header is used before it is sealed as the means for evacuation of the valve. The lower end of the envelope is coned and the header has a corresponding flange 27 formed as a trough in which a ring of solder 33 is placed ; the two parts are mounted in a tube 30 for evacuation and are thereafter moved together, the joint being heated to effect the sealing. The solder may be attached to the coned end of the envelope instead of using the ring 33. The heating is obtained by applying alternating current to a plate 43 arranged in a centring tube 35 drawn on the header; this plate is of tantalum coated on one or both sides with barium or strontium oxide, which coating after sealing is used as the getter. The plate may be inclined to prevent the getter vapour entering the envelope. The tube 35 has a key way 36 for ensuring correct position in the valve socket, and acts as a shield between the anode and grid leads. Specification 503,076 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US537762XA | 1939-04-07 | 1939-04-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB537762A true GB537762A (en) | 1941-07-04 |
Family
ID=21986449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6190/40A Expired GB537762A (en) | 1939-04-07 | 1940-04-05 | Improvements in and relating to electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB537762A (en) |
-
1940
- 1940-04-05 GB GB6190/40A patent/GB537762A/en not_active Expired
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