GB481790A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB481790A GB481790A GB16780/36A GB1678036A GB481790A GB 481790 A GB481790 A GB 481790A GB 16780/36 A GB16780/36 A GB 16780/36A GB 1678036 A GB1678036 A GB 1678036A GB 481790 A GB481790 A GB 481790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- control
- grid
- cathode
- surrounded
- 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
- 238000013459 approach Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
-
- 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)
- Amplifiers (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
481,790. Discharge apparatus ; Wireless receiving - apparatus. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 16, 1936, No. 16780. Convention date, June 27, 1935. [Classes 39 (i) and 40 (v)] An electron discharge device for tuning or like voltage indication comprises an electron-emitting cathode surrounded by a bowl-shaped anode coated with fluorescent material, and one or more control electrodes between the anode and cathode adapted, in dependence on the potential applied thereto, to vary the area of the anode which is caused to glow by electrons from the cathode. The device may be combined in the same envelope with an amplifying stage, as in the form shown in Fig. 1, in which the cathode has two electron-emitting portions, the one 13 being surrounded by control grid 14 and anode 15 forming a triode, while the other 16 is surrounded by the bowl - shaped fluorescent anode 19. A rod-like control electrode 17 is connected directly to the triode anode 15. A cup-shaped shield 22 confines electrons to the slopiiig surface of anode 19 and is preferably connected to the anode by rods 23, Fig. 6. When used as a tuning indicator, the rectified carrier voltage developed across the diode load 30, Fig. 7, is applied through a resistancecapacity filter 33, 34 to the grid 14. A resistance 25 is connected between the anode and supply 26 ; as the grid 14 becomes negative the anode 15, and hence the control rod 17, becomes more positive and approaches the potential of anode 19 which is directly connected to supply 26. The shadow thrown by rod 17 thus becomes smaller and the edges thereof may be made to coincide or even to overlap, giving, when viewed from above, a sensitive indication of the potential of grid 14. Two diametrically opposite control rods may be used. In the form shown in Fig. 6, the control electrode 24 is a vane tapered so as to give uniform' control over the sloping surface of anode 19. A straight edge to the shadow is thus obtained, but other shapes of edge may be obtained by shaping the control electrode. The triode portion may be replaced by a multi-element tube. Specification 481,791 is reforred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28665A US2051188A (en) | 1935-06-27 | 1935-06-27 | Tuning indicator tube |
| US80474A US2130162A (en) | 1935-06-27 | 1936-05-19 | Tuning indicator tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB481790A true GB481790A (en) | 1938-03-16 |
Family
ID=26703956
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16780/36A Expired GB481790A (en) | 1935-06-27 | 1936-06-16 | Improvements in or relating to electron discharge devices |
| GB16781/36A Expired GB481791A (en) | 1935-06-27 | 1936-06-16 | Improvements in or relating to electron discharge devices |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16781/36A Expired GB481791A (en) | 1935-06-27 | 1936-06-16 | Improvements in or relating to electron discharge devices |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2130162A (en) |
| CH (1) | CH203784A (en) |
| DE (1) | DE692964C (en) |
| FR (1) | FR807964A (en) |
| GB (2) | GB481790A (en) |
| NL (2) | NL46087C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE950945C (en) * | 1940-07-23 | 1956-10-18 | Lorenz C Ag | Voltage indicator tubes, in particular tuning indicator tubes for radio equipment, with a display system and a further, independent electrode system for other purposes |
| US2436393A (en) * | 1944-12-29 | 1948-02-24 | Bell Telephone Labor Inc | Cathode-ray tube with discharge to deflecting plates |
| US2611875A (en) * | 1948-10-01 | 1952-09-23 | Cons Eng Corp | Electron source |
| CH291029A (en) * | 1949-09-09 | 1953-05-31 | Siemens Ag | Electron tubes with fluorescent screens, in particular for tuning display |
| US2600063A (en) * | 1951-02-20 | 1952-06-10 | Leon S Maloof | Visual electron flow indicator |
| DE950873C (en) * | 1951-03-08 | 1956-10-18 | Lorenz C Ag | Vacuum tubes for measuring and displaying electrical voltages, in which a light sector is generated on a fluorescent screen |
| DE976143C (en) * | 1952-01-31 | 1963-03-28 | Standard Elek K Lorenz Ag | Voltage indicator tubes |
| NL82773C (en) * | 1952-02-08 | |||
| DE941306C (en) * | 1952-03-20 | 1956-04-05 | Philips Patentverwaltung | Electron beam tuning indicator tube |
| DE918949C (en) * | 1952-04-30 | 1954-10-07 | Lorenz C Ag | Voltage indicator tubes, consisting of cathode, screen and luminescent screen with the same penetration along the cathode axis |
| DE1089485B (en) * | 1952-07-16 | 1960-09-22 | Standard Elektrik Lorenz Ag | Voltage and voltage comparison indicator tubes |
| DE1029490B (en) * | 1952-10-01 | 1958-05-08 | Telefunken Gmbh | Display tubes with two independently controllable deflection electrodes or electrode systems lying parallel to the cathode |
| US3174072A (en) * | 1961-03-16 | 1965-03-16 | Motorola Inc | Recording level indicator and circuit |
-
0
- NL NL57947D patent/NL57947C/xx active
- NL NL46087D patent/NL46087C/xx active
-
1936
- 1936-05-19 US US80474A patent/US2130162A/en not_active Expired - Lifetime
- 1936-06-16 GB GB16780/36A patent/GB481790A/en not_active Expired
- 1936-06-16 GB GB16781/36A patent/GB481791A/en not_active Expired
- 1936-06-19 FR FR807964D patent/FR807964A/en not_active Expired
- 1936-06-24 CH CH203784D patent/CH203784A/en unknown
- 1936-06-28 DE DE1936R0096685 patent/DE692964C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR807964A (en) | 1937-01-26 |
| CH203784A (en) | 1939-03-31 |
| US2130162A (en) | 1938-09-13 |
| DE692964C (en) | 1940-06-29 |
| NL57947C (en) | |
| NL46087C (en) | |
| GB481791A (en) | 1938-03-16 |
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