GB889832A - Improvements in or relating to luminous voltage indicators - Google Patents
Improvements in or relating to luminous voltage indicatorsInfo
- Publication number
- GB889832A GB889832A GB31350/58A GB3135058A GB889832A GB 889832 A GB889832 A GB 889832A GB 31350/58 A GB31350/58 A GB 31350/58A GB 3135058 A GB3135058 A GB 3135058A GB 889832 A GB889832 A GB 889832A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- grid
- cathode
- control grid
- voltage
- 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
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/14—Magic-eye or analogous tuning indicators
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
889,832. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 1, 1958 [Oct. 4, 1957], No. 31350/58. Class 39(1) A luminous voltage indicator comprises an electron discharge tube comprising a cathode 2, Fig. 1, a planar reflector electrode 4 connected to the cathode a control grid 3 surrounding the cathode and an anode 5 arranged wholly at one side of the cathode 2 the anode 5 comprising a wire grid coated with a luminescent substance. It is suitable for use in transistorised computers and counters especially of binary type. A luminous indication is given in condition 1 and the indication is extinguished in condition 0. There is provided a control grid and an anode comprising a grid coated with luminescent material e.g. willemite. In one form Fig. 1, the grid serving as an anode is of elliptical form. In Figs. 2 and 3 (not shown) the anode is a curved or flat grid. The anode grid of Fig. 2 is formed by pressing a helix. The control grid 3 is of elliptical form and the voltage to be indicated is applied to this grid. A reflector 4 prevents electrons passing from the cathode away from the anode and the electrons from the other side of the cathode pass through the anode wires and are reflected by the space charge inside the anode to strike the reverse side of the luminescent coating. Luminescence occurs at an anode voltage of 25-50 volts e.g. in computers. The control grid 3 is connected to the collector of a transistor. The anode wires are of coarser pitch than those of the control grid. The luminescent coating is applied by spraying.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL221345 | 1957-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB889832A true GB889832A (en) | 1962-02-21 |
Family
ID=19750998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31350/58A Expired GB889832A (en) | 1957-10-04 | 1958-10-01 | Improvements in or relating to luminous voltage indicators |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2956194A (en) |
| CH (1) | CH362759A (en) |
| DE (1) | DE1820410U (en) |
| FR (1) | FR1204039A (en) |
| GB (1) | GB889832A (en) |
| NL (1) | NL99123C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4206404A (en) * | 1976-10-14 | 1980-06-03 | Wagner Electric Corporation | Vacuum fluorescent indicator |
| US4301389A (en) * | 1979-12-12 | 1981-11-17 | International Business Machines Corp. | Multiple beam cathode ray tube with apertured cathode and control grid |
| JPH0640474B2 (en) * | 1985-07-08 | 1994-05-25 | 伊勢電子工業株式会社 | Display tube for light source |
| CN103888732B (en) * | 2014-03-25 | 2017-11-10 | 中国矿业大学(北京) | A kind of simplex and recognition methods based on mine lamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL41801C (en) * | 1934-07-25 | |||
| US2243408A (en) * | 1938-05-12 | 1941-05-27 | Rca Corp | Visual tuning indicator |
-
0
- NL NL99123D patent/NL99123C/xx active
-
1958
- 1958-09-30 DE DEN9100U patent/DE1820410U/en not_active Expired
- 1958-10-01 CH CH6455858A patent/CH362759A/en unknown
- 1958-10-01 GB GB31350/58A patent/GB889832A/en not_active Expired
- 1958-10-03 US US765194A patent/US2956194A/en not_active Expired - Lifetime
- 1958-10-03 FR FR1204039D patent/FR1204039A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH362759A (en) | 1962-06-30 |
| US2956194A (en) | 1960-10-11 |
| NL99123C (en) | |
| DE1820410U (en) | 1960-10-27 |
| FR1204039A (en) | 1960-01-22 |
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