GB621813A - Improvements in electron discharge tubes - Google Patents
Improvements in electron discharge tubesInfo
- Publication number
- GB621813A GB621813A GB30318/46A GB3031846A GB621813A GB 621813 A GB621813 A GB 621813A GB 30318/46 A GB30318/46 A GB 30318/46A GB 3031846 A GB3031846 A GB 3031846A GB 621813 A GB621813 A GB 621813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- disc
- sealed
- cathode
- envelope
- 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
- H01J21/00—Vacuum tubes
- H01J21/36—Tubes with flat electrodes, e.g. disc electrode
-
- 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
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
621,813. Thermionic valves. SYLVANIA ELECTRIC PRODUCTS, Inc. Oct. 10, 1946, No. 30318. Convention date, Nov. 14, 1944. [Class 39 (i)] An electron discharge device has an anode 11 with a dished central portion and its periphery sealed through the envelope. The disc 10 supports a central grid, and is likewise sealed through the envelope. Through the end wall 5 is sealed a metal tube 7 containing an inner metal tube 18 with annular guiding bulges 19, 20. Secured to the tube 18 is a plurality of wires 23, 24, &c., supporting the skirt 21 of the cathode disc 17 which is backed by a reflector disc 30. The heater 27 is attached to a lead 28 passing through a vacuum-tight glass bead 29. Jigs are described (Figs. 6, 6a, 6b, 7, not shown) for longitudinal adjustment of inner tube 18 in outer tube 7 until a pre-selected cathode-gridspacing is accurately obtained. The two tubes are then soldered or brazed at 34, the device exhausted and processed, insulating spacers 37, 38 and metal base pin 39 introduced, and the tube 18 crimped at 35, 36. A jig is also described (Figs. 8a, 8b, not shown) for accurately obtaining a pre-selected thickness of cathode coating 17a by shaving off the superfluous material with a sharp blade. Fig. 9 (not shown) shows the device mounted in a coaxial transmission line.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US621813XA | 1944-11-14 | 1944-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB621813A true GB621813A (en) | 1949-04-20 |
Family
ID=22040728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30318/46A Expired GB621813A (en) | 1944-11-14 | 1946-10-10 | Improvements in electron discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB621813A (en) |
-
1946
- 1946-10-10 GB GB30318/46A patent/GB621813A/en not_active Expired
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