GB638139A - Improvements in and relating to electron discharge devices - Google Patents
Improvements in and relating to electron discharge devicesInfo
- Publication number
- GB638139A GB638139A GB24396/46A GB2439646A GB638139A GB 638139 A GB638139 A GB 638139A GB 24396/46 A GB24396/46 A GB 24396/46A GB 2439646 A GB2439646 A GB 2439646A GB 638139 A GB638139 A GB 638139A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- collar
- tube
- envelope
- wire
- 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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/867—Means associated with the outside of the vessel for shielding, e.g. magnetic shields
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/65—Holding-devices for protective discs or for picture masks
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Measurement Of Radiation (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
638,139. Cathode-ray tubes. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 16, 1946, No. 24396. Convention date, June 18, 1945. [Class 39 (i)] In a cathode-ray tube in which the luminescent screen on the end wall of the tube acquires a high potential due to secondary emission, a ring or loop of metal wire or band encircling the envelope in the region of the end wall is held at a potential similar to that acquired by the screen, in order to minimize current leakage through the envelope to the tubesupporting structure. The conducting band may comprise as shown a wire ring 16, connected through an insulated wire 17 to the terminal 18 of the anode 5 provided as a coating on the interior surface of the tube or as a separate sheet metal electrode. The ring 16 is held in place by a rubber collar 17, which serves to support the tube resiliently in its assembly. The ring 16 may be embedded in the collar 7 to serve also as a reinforcement for the collar, a portion of the collar interposing between the ring and the envelope. A plate 8 carrying calibrations is secured over the face of the tube in a metal frame 9, fitted to the collar 7. The Specification as open to inspection under Sect. 91 states that a coating on the envelope may be employed instead of a wire ring. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US600009A US2497660A (en) | 1945-06-18 | 1945-06-18 | Leakage minimizing shield for electron discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB638139A true GB638139A (en) | 1950-05-31 |
Family
ID=24402005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24396/46A Expired GB638139A (en) | 1945-06-18 | 1947-08-16 | Improvements in and relating to electron discharge devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2497660A (en) |
| BE (1) | BE476954A (en) |
| GB (1) | GB638139A (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2545524A (en) * | 1945-08-29 | 1951-03-20 | Rca Corp | Schmidt television projection system |
| US2551790A (en) * | 1949-04-01 | 1951-05-08 | Rca Corp | Positioning structure for cathode-ray tubes |
| US2756415A (en) * | 1949-06-01 | 1956-07-24 | Rca Corp | Schmidt television projector arrangement |
| US2663011A (en) * | 1949-07-06 | 1953-12-15 | Sylvania Electric Prod | Cathode-ray tube support |
| NL85244C (en) * | 1950-01-19 | |||
| US2602114A (en) * | 1950-04-10 | 1952-07-01 | Richard A Fisch | Insulating ring and protective device for cathode-ray tubes |
| US2559353A (en) * | 1950-07-25 | 1951-07-03 | Richard A Fisch | Mounting and protecting device for cathode-ray tubes |
| US2684477A (en) * | 1951-05-21 | 1954-07-20 | Richard A Fisch | Mounting and insulating ring for cathode-ray and television tubes |
| US2907914A (en) * | 1954-05-26 | 1959-10-06 | Magnetic Metals Company | Electrically energized magnetic shield |
| NL198764A (en) * | 1954-07-12 | |||
| NL207764A (en) * | 1955-06-07 | |||
| US2951179A (en) * | 1956-05-28 | 1960-08-30 | Gen Electric | Electron shield for post acceleration cathode ray tube |
| US2898586A (en) * | 1956-06-25 | 1959-08-04 | Sylvania Electric Prod | Television apparatus |
| US3051782A (en) * | 1959-07-13 | 1962-08-28 | Nat Video Corp | Implosion panel spacing device |
| US3084217A (en) * | 1960-08-18 | 1963-04-02 | Zenith Radio Corp | Television receiver with safety plate and mounting means |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2123636A (en) * | 1932-02-23 | 1938-07-12 | Firm Fernseh Aktien Ges | High-vacuum cathode ray tube |
| US2119559A (en) * | 1935-07-25 | 1938-06-07 | Bell Telephone Labor Inc | Electron discharge device |
| GB506418A (en) * | 1936-08-25 | 1939-05-26 | Lorenz C Ag | Supporting means for braun tubes |
| US2343630A (en) * | 1942-04-25 | 1944-03-07 | Du Mont Allen B Lab Inc | Shield for cathode ray tubes |
-
0
- BE BE476954D patent/BE476954A/xx unknown
-
1945
- 1945-06-18 US US600009A patent/US2497660A/en not_active Expired - Lifetime
-
1947
- 1947-08-16 GB GB24396/46A patent/GB638139A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE476954A (en) | |
| US2497660A (en) | 1950-02-14 |
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