GB1194357A - A Cathode Ray Tube having improved Life. - Google Patents
A Cathode Ray Tube having improved Life.Info
- Publication number
- GB1194357A GB1194357A GB52388/67A GB5238867A GB1194357A GB 1194357 A GB1194357 A GB 1194357A GB 52388/67 A GB52388/67 A GB 52388/67A GB 5238867 A GB5238867 A GB 5238867A GB 1194357 A GB1194357 A GB 1194357A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- gas
- released
- metallic member
- getter
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/395—Filling vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
1,194,357. Cathode-ray tubes. SYLVANIA ELECTRIC PRODUCTS Inc. 17 Nov., 1967 [17 Nov., 1966], No. 52388/67. Heading H1D. In a cathode-ray tube having an apertured metallic member such as the shadow-mask in a colour tube, the metallic member contains an occluded gas such as hydrogen or nitrogen which is continually released in operation of the tube under electron bombardment to maintain a partial pressure, e.g. 10<SP>-8</SP> torr, of the gas not more than one magnitude below the total pressure, e.g. 10<SP>-7</SP> torr. This is in order to maintain optimum electron emission and to improve tube life. The gas may be introduced from an external source before sealing of the tube or released from e.g. zirconium or titanium hydride contained within a ring structure also containing getter material, e.g. BaA1. The hydrogen is released first so that subsequent evaporation of the getter at a higher temperature secures a more uniform deposition of the getter on the metallic member and on adjacent parts of the envelope wall. Argon is usually present contributing to the total gas pressure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US59510466A | 1966-11-17 | 1966-11-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1194357A true GB1194357A (en) | 1970-06-10 |
Family
ID=24381746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB52388/67A Expired GB1194357A (en) | 1966-11-17 | 1967-11-17 | A Cathode Ray Tube having improved Life. |
Country Status (2)
Country | Link |
---|---|
US (1) | US3432712A (en) |
GB (1) | GB1194357A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4431939A (en) * | 1981-07-28 | 1984-02-14 | Rca Corporation | Structure and method for eliminating blocked apertures caused by charged particles |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3658401A (en) * | 1970-01-06 | 1972-04-25 | Rca Corp | Method of manufacture of cathode ray tubes having frit-sealed envelope assemblies |
US3792300A (en) * | 1972-07-15 | 1974-02-12 | Gte Sylvania Inc | Cathode ray tube having a conductive metallic coating therein |
US5202606A (en) * | 1989-06-23 | 1993-04-13 | U.S. Philips Corporation | Cathode-ray tube with focussing structure and getter means |
KR960002929B1 (en) * | 1993-07-24 | 1996-02-28 | 엘지전자주식회사 | Crt getter device |
FR2747839B1 (en) * | 1996-04-18 | 1998-07-03 | Pixtech Sa | FLAT VISUALIZATION SCREEN WITH HYDROGEN SOURCE |
JP3745844B2 (en) * | 1996-10-14 | 2006-02-15 | 浜松ホトニクス株式会社 | Electron tube |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2528547A (en) * | 1945-08-03 | 1950-11-07 | Gerard J Reilly | Hydrogen thyratron |
US2572881A (en) * | 1946-04-22 | 1951-10-30 | Rothstein Jerome | Thyratron cathode design to prevent cleanup of hydrogen |
US2640952A (en) * | 1947-02-05 | 1953-06-02 | Rca Corp | Hydrogen pressure control for hydrogen filled discharge tubes |
BE510847A (en) * | 1951-04-23 | |||
US2886730A (en) * | 1957-02-25 | 1959-05-12 | Corning Glass Works | Aperture mask coating to prevent cathode poisoning |
US3138734A (en) * | 1960-07-01 | 1964-06-23 | Corning Glass Works | Prevention of cathode poisoning in an electron tube |
-
1966
- 1966-11-17 US US595104A patent/US3432712A/en not_active Expired - Lifetime
-
1967
- 1967-11-17 GB GB52388/67A patent/GB1194357A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4431939A (en) * | 1981-07-28 | 1984-02-14 | Rca Corporation | Structure and method for eliminating blocked apertures caused by charged particles |
Also Published As
Publication number | Publication date |
---|---|
US3432712A (en) | 1969-03-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |