GB481791A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB481791A GB481791A GB16781/36A GB1678136A GB481791A GB 481791 A GB481791 A GB 481791A GB 16781/36 A GB16781/36 A GB 16781/36A GB 1678136 A GB1678136 A GB 1678136A GB 481791 A GB481791 A GB 481791A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- control
- grid
- cathode
- fluorescent
- 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
- 239000000463 material Substances 0.000 abstract 2
- 230000010355 oscillation Effects 0.000 abstract 2
- 238000013459 approach Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 239000013642 negative control Substances 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
Abstract
481,791. Discharge apparatus ; wireless receiving circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 16, 1936, No. 16781. Convention date, June 27, 1935. [Classes 39 (i) and 40 (v)] An electron discharge. device suitable for use as a tuning or like voltage indicator comprises a cathode having two electron emitting sections, an anode and a control grid surrounding the first section, a second anode coated with fluorescent material and arranged to be visible through the envelope and to receive the electron stream from the second cathode section, and a control electrode electrically connected to the first anode and serving to control, in dependence on the potential of the first anode, the angular divergence the stream of electrons incident on the fluorescent anode. In one form, the tubular mesh fluorescent anode 20, Fig. 1, surrounds one portion 16 of the cathode, the other portion of which is surrounded by anode 15 and control grid 14. The control rod 17 is connected to the anode 15. When used as a tuning indicator, the negative rectified carrier voltage is applied to the grid 14. A resistance is connected between the anode 15 and the supply ; as the grid 14 becomes negative the anode 15 and hence the rod 17 approaches the potential of the anode 20 which is directly connected to the supply. As the rod 17 becomes more positive its shadow on the anode 20 becomes smaller and the edges thereof may be made to coincide or oven to overlap, giving a sensitive indication of the voltage on the grid 14. Two diametrically opposite control rods may be used. In another form, the fluorescent anode is a flat plate 27, Fig. 6, on which is thrown an oblique electron beam of width varying with the potential of a slotted control cylinder 25. That portion only of the cathode 16 which is opposite the slot 26 is coated with emissive material. Other forms are described in which flat or V-shaped fluorescent anodes and control members are disposed on opposite sides of the cathode. Specification 443,602 is referred to. The Specification as open to inspection under Sect. 91 comprises also the connection of the control electrode to the control grid of the associated valve. In the form shown in Fig. 8 (Cancelled), one section 51 of the cathode is surrounded by a pentode assembly, the supporting rods 57 of the control grid being extended upwards so as to form a control electrode between the other cathodic section 56 and the mesh fluorescent anode 59. Oval wire rings 58 secured to rods 57 concentrate the beam from cathode 56 axially. The anode 59 is split to reduce high-frequency heating during exhaustion. The device is used in the circuit shown in Fig. 11 (Cancelled) which includes a muting arrangement. The negative rectified carrier voltage from diode 60 is applied through a resistance capacity filter 65, 67 to the control grid 52. The minimum fluorescent area on the anode 59 indicates correct tuning. The coupled circuits 77, 79 connected respectively to the suppressor grid 54 and anode 55 are normally oscillating. The rectification of this oscillation produces a bias in resistance 80 which is applied to the grid of the amplifying valve 68 to produce cut-off. Application of the negative control voltage to grid 52 stops the oscillation and the amplifier is released. This subject-matter does not appear in the Specification as accepted.
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 |
---|---|
GB481791A true GB481791A (en) | 1938-03-16 |
Family
ID=26703956
Family Applications (2)
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 |
GB16780/36A Expired GB481790A (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 |
---|---|---|---|
GB16780/36A Expired GB481790A (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) | GB481791A (en) |
NL (2) | NL57947C (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 |
CH293547A (en) * | 1949-09-09 | 1953-09-30 | 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 NL46087D patent/NL46087C/xx active
- NL NL57947D patent/NL57947C/xx active
-
1936
- 1936-05-19 US US80474A patent/US2130162A/en not_active Expired - Lifetime
- 1936-06-16 GB GB16781/36A patent/GB481791A/en not_active Expired
- 1936-06-16 GB GB16780/36A patent/GB481790A/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 |
---|---|
GB481790A (en) | 1938-03-16 |
DE692964C (en) | 1940-06-29 |
NL57947C (en) | |
CH203784A (en) | 1939-03-31 |
US2130162A (en) | 1938-09-13 |
FR807964A (en) | 1937-01-26 |
NL46087C (en) |
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