GB1258134A - - Google Patents
Info
- Publication number
- GB1258134A GB1258134A GB1258134DA GB1258134A GB 1258134 A GB1258134 A GB 1258134A GB 1258134D A GB1258134D A GB 1258134DA GB 1258134 A GB1258134 A GB 1258134A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- cathode
- heating ribbon
- feb
- extends
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
Abstract
1,258,134. Electron guns. INTERNATIONAL STANDARD ELECTRIC CORP. 12 Feb., 1969 [17 Feb., 1968], No. 7658/69. Heading H1D. An electron gun for a television picture tube comprises a Wehnelt cylinder 1 across which extends an insulator disc 2 which supports a cathode heating ribbon strung across a diameter of the disc. In Fig. 1 the disc 2 is provided with an annular projection 20 across which extends a cathode heating ribbon (not shown in Fig. 1) supporting a cathode 10 and held in tension in grooves in the projection 20 by means of two quadrantal springs 6 secured to the disc by respective eyelets 4. The cathode 10 is preferably a sintered pellet of nickel powder impregnated with electron emissive material. In a modification, Figs. 3 and 4 (not shown) the annular projection 20 is omitted and the heating ribbon is supported by L-shaped springs. In a further arrangement, Figs. 5 and 6 (not shown) the heating ribbon is itself of springy material with its ends secured in the eyelets 4 so that it is bowed away from the disc 2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681562027 DE1562027A1 (en) | 1968-02-17 | 1968-02-17 | Electron beam generating system for television picture tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1258134A true GB1258134A (en) | 1971-12-22 |
Family
ID=5677667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1258134D Expired GB1258134A (en) | 1968-02-17 | 1969-02-12 |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT303137B (en) |
| BE (1) | BE728484A (en) |
| ES (1) | ES363751A1 (en) |
| FR (1) | FR2002107A1 (en) |
| GB (1) | GB1258134A (en) |
| SE (1) | SE356395B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3983443A (en) * | 1975-03-24 | 1976-09-28 | Rca Corporation | Vacuum electron device having directly-heated matrix-cathode-heater assembly |
-
1969
- 1969-02-12 GB GB1258134D patent/GB1258134A/en not_active Expired
- 1969-02-14 FR FR6903587A patent/FR2002107A1/fr not_active Withdrawn
- 1969-02-14 AT AT148869A patent/AT303137B/en not_active IP Right Cessation
- 1969-02-17 ES ES363751A patent/ES363751A1/en not_active Expired
- 1969-02-17 SE SE212269A patent/SE356395B/xx unknown
- 1969-02-17 BE BE728484D patent/BE728484A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2002107A1 (en) | 1969-10-03 |
| ES363751A1 (en) | 1970-12-16 |
| AT303137B (en) | 1972-11-10 |
| BE728484A (en) | 1969-08-18 |
| SE356395B (en) | 1973-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |