GB502968A - Improvements in or relating to electron discharge devices for visually indicating voltage - Google Patents
Improvements in or relating to electron discharge devices for visually indicating voltageInfo
- Publication number
- GB502968A GB502968A GB26121/37A GB2612137A GB502968A GB 502968 A GB502968 A GB 502968A GB 26121/37 A GB26121/37 A GB 26121/37A GB 2612137 A GB2612137 A GB 2612137A GB 502968 A GB502968 A GB 502968A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- target
- control electrode
- anode
- sept
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- -1 and stripping Chemical compound 0.000 abstract 1
- 239000011888 foil Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/16—Incandescent screens
-
- 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
- Electron Sources, Ion Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
502,968. Discharge apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Sept. 27, 1937, No. 26121. Convention date, Sept. 26, 1936. [Class 39 (i)] An electron discharge device for giving visual indication of voltage, such as a tuning indicator for radio receivers, has a straight thermionic cathode 16, an anode 20 adjacent the cathode formed as or including a target 21 of thin metal sheet or foil adapted to become incandescent when bombarded by electrons from the cathode, and a control electrode 17 substantially parallel to the cathode and so arranged that when the anode is at a suitable potential the portion of the target reached by electrons and consequently the size of the incan descent regions produced on the target is an indication of the voltage applied to the control electrode. In the form shown, the cathode 16 is integral with the cathode 13 of an associated amplifying triode, the anode 15 of which is connected to the control electrode 17. The target 21 may be nickel À00005-À00025 in. in thickness formed by plating on a metal base, such as molybdenum, and stripping, or tantalum foil rolled to À00003- À00005 in. The electrode 17 may be a rod or a strip placed edgewise to the cathode, which may be coated with emissive material only on the part opposite the target. The usual circuit is connected to the rectifier load and is arranged so that at resonance the beams passing opposite sides of the control electrode overlap, giving a bright patch on a dull red background. British Specification 481,791 and U.S.A. Specification 2,051,188 are referred to:
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US102709A US2113669A (en) | 1936-09-26 | 1936-09-26 | Tuning indicator tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB502968A true GB502968A (en) | 1939-03-27 |
Family
ID=22291281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26121/37A Expired GB502968A (en) | 1936-09-26 | 1937-09-27 | Improvements in or relating to electron discharge devices for visually indicating voltage |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2113669A (en) |
| DE (1) | DE692901C (en) |
| GB (1) | GB502968A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2927237A (en) * | 1940-07-23 | 1960-03-01 | Int Standard Electric Corp | Voltage indicator tubes |
| US2600063A (en) * | 1951-02-20 | 1952-06-10 | Leon S Maloof | Visual electron flow indicator |
-
1936
- 1936-09-26 US US102709A patent/US2113669A/en not_active Expired - Lifetime
-
1937
- 1937-07-31 DE DE1937R0099946 patent/DE692901C/en not_active Expired
- 1937-09-27 GB GB26121/37A patent/GB502968A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2113669A (en) | 1938-04-12 |
| DE692901C (en) | 1940-06-28 |
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