GB380859A - Improvements in or relating to cathode ray discharge devices for television and other signalling systems and the like - Google Patents
Improvements in or relating to cathode ray discharge devices for television and other signalling systems and the likeInfo
- Publication number
- GB380859A GB380859A GB18767/31A GB1876731A GB380859A GB 380859 A GB380859 A GB 380859A GB 18767/31 A GB18767/31 A GB 18767/31A GB 1876731 A GB1876731 A GB 1876731A GB 380859 A GB380859 A GB 380859A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- tube
- cathode
- grids
- anode
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
Abstract
380,859. Cathode-ray tubes ; television. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Johnson, J. B. ; 57, Elm Street, Maplewood, New Jersey, U.S.A.) June 29, 1931, No. 18767. Convention date, July 7, 1930. [Classes 39 (i) and 40 (iii).] A cathode-ray tube in which a beam of electrons traverses a screen, has one or two control electrodes disposed between the anode and screen and receiving signalling potentials so as to modulate the beam. The tube may be used for producing television images. The tube shown has a cathode 2, an anode 4, two pairs of deflecting plates 5, 6, a screen 9, and two control electrodes 7, 8 formed as grids or perforated discs of segmental spherical shape the centre of curvature of which is at the deflecting plates. The grid 7 is connected directly with the anode and through the secondary of a transformer 15 with the grid 8. The static potential between the grids may be adjusted. The incoming image currents are supplied to the primary of the transformer 15. The grids are mounted close to the screen, and the grid 8 may be arranged outside the tube.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US466067A US2155192A (en) | 1930-07-07 | 1930-07-07 | Signaling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB380859A true GB380859A (en) | 1932-09-29 |
Family
ID=23850316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18767/31A Expired GB380859A (en) | 1930-07-07 | 1931-06-29 | Improvements in or relating to cathode ray discharge devices for television and other signalling systems and the like |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2155192A (en) |
| FR (1) | FR719632A (en) |
| GB (1) | GB380859A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE749417C (en) * | 1941-01-01 | 1944-11-22 | Discharge tubes, especially for short waves | |
| US2969478A (en) * | 1949-06-10 | 1961-01-24 | Sperry Rand Corp | Information storage system |
| GB705499A (en) * | 1950-02-16 | 1954-03-17 | Nat Res Dev | Improvements in or relating to electronic information-storing devices |
| US3182224A (en) * | 1962-10-26 | 1965-05-04 | Dick Co Ab | Centering system for an electrostatic writing tube |
| US4051468A (en) * | 1976-07-28 | 1977-09-27 | Rca Corporation | Apparatus and method for modulating a flat panel display device |
-
1930
- 1930-07-07 US US466067A patent/US2155192A/en not_active Expired - Lifetime
-
1931
- 1931-06-29 GB GB18767/31A patent/GB380859A/en not_active Expired
- 1931-07-06 FR FR719632D patent/FR719632A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2155192A (en) | 1939-04-18 |
| FR719632A (en) | 1932-02-08 |
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