GB711275A - Improved circuit arrangement employing cathode ray tubes - Google Patents
Improved circuit arrangement employing cathode ray tubesInfo
- Publication number
- GB711275A GB711275A GB30712/50A GB3071250A GB711275A GB 711275 A GB711275 A GB 711275A GB 30712/50 A GB30712/50 A GB 30712/50A GB 3071250 A GB3071250 A GB 3071250A GB 711275 A GB711275 A GB 711275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- anode
- envelope
- target
- signal electrode
- 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
- 238000000576 coating method Methods 0.000 abstract 13
- 239000011248 coating agent Substances 0.000 abstract 11
- 239000004020 conductor Substances 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 238000005040 ion trap Methods 0.000 abstract 1
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
- H01J31/26—Image pick-up tubes having an input of visible light and electric output
- H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
- H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon
- H01J31/38—Tubes with photoconductive screen, e.g. vidicon
-
- 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
- H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
711,275. Television pick-up tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Dec. 6, 1951 [Dec. 16, 1950], No. 30712/50. Class 39(1) An electric circuit arrangement employs a cathode-ray tube comprising an electron gun, a target having a signal electrode, and between the gun and the target an anode electrode and electromagnetic deflecting means surrounding the anode, wherein the anode is formed in two spaced annular parts and the deflecting means surrounds the anode part remote from the signal electrode, the circuit including means for maintaining each of the anode parts at substantially the same high direct potential, and means for effectively connecting the anode part nearer the signal electrode to earth for high frequencies whereby the pick-up of spurious signals by the signal electrode due to voltage fluctuations induced in the anode by the deflecting means is substantially reduced. As shown in Fig. 2 the anode may comprise two coatings 10 and 13 connected by a resistance 20 which may be a sensitive coating on the shoulder of the envelope. The coatings are thus at the same direct potential but high frequency currents induced in the coating 10 by the deflecting coils 17 are prevented from reaching the coating 13 and influencing the target 9. An exterior coating 21 connected to an earthed shield 19 may be provided to give a capacitive earth connection for the coating 13. In a modification, Fig. 3 (not shown), the resistance 20 is omitted and the coating 13 is connected through the envelope to an exterior strip conductor which extends along the envelope as far as the target electrode and is connected to an H.T. supply; a shield connected to the shield 19 surrounds the coating 13, the shoulder of the tube, and part of the coating 10. In a further modification, Fig. 4 (not shown), the coating 13 is provided with a lead extending through the envelope and connected by a wire extending along the outside of the envelope to the lead-in conductor 12 which is connected to the coating 10; the wire may be enclosed in an earthed electrostatic screen. An ion trap grid may be connected to the coating 13.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7107545.A NL165997B (en) | 1950-12-16 | PROCESS FOR PREPARING SILICA GEL. | |
| GB30712/50A GB711275A (en) | 1950-12-16 | 1950-12-16 | Improved circuit arrangement employing cathode ray tubes |
| FR1051489D FR1051489A (en) | 1950-12-16 | 1951-12-14 | Improvements in cathode ray tubes |
| DEE4777A DE944558C (en) | 1950-12-16 | 1951-12-15 | Circuit arrangement with a charge storage receiving tube stabilized at or approximately at cathode potential |
| US261804A US2740918A (en) | 1950-12-16 | 1951-12-15 | Cathode ray tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB30712/50A GB711275A (en) | 1950-12-16 | 1950-12-16 | Improved circuit arrangement employing cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB711275A true GB711275A (en) | 1954-06-30 |
Family
ID=10311956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30712/50A Expired GB711275A (en) | 1950-12-16 | 1950-12-16 | Improved circuit arrangement employing cathode ray tubes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2740918A (en) |
| DE (1) | DE944558C (en) |
| FR (1) | FR1051489A (en) |
| GB (1) | GB711275A (en) |
| NL (1) | NL165997B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2878416A (en) * | 1953-08-10 | 1959-03-17 | Pye Ltd | Television camera tubes |
| GB799425A (en) * | 1954-07-20 | 1958-08-06 | Emi Ltd | Improvements in or relating to arrangements embodying pick-up tubes |
| US2873398A (en) * | 1956-01-04 | 1959-02-10 | Munsey E Crost | Direct viewing moving target indicator cathode-ray storage tube |
| DE1292173B (en) * | 1963-09-07 | 1969-04-10 | Fernseh Gmbh | Adjusting device in a deflection system for television tubes and. like |
| US3303278A (en) * | 1964-05-13 | 1967-02-07 | Tesla Np | Television pick-up camera for three color pick-up of television images |
| JPS59207545A (en) * | 1983-05-12 | 1984-11-24 | Sony Corp | Image pick-up tube |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR825557A (en) * | 1936-08-13 | 1938-03-07 | Image-accumulating tube television picture collecting device | |
| DE896055C (en) * | 1936-08-13 | 1953-11-09 | Walter Heimann Dr Ing | Arrangement for reducing low-frequency interference pulses superimposed on the useful image pulses in the cathode ray scanner |
| DE702243C (en) * | 1936-09-10 | 1941-02-03 | Walter Heimann Dr Ing | Method for reducing or eliminating the disturbance pulse that occurs when storing television transmitter tubes |
| DE742002C (en) * | 1939-03-30 | 1943-11-20 | Bosch Gmbh Robert | Tube transmitter |
| DE742802C (en) * | 1940-09-03 | 1943-12-11 | Fernseh Gmbh | Storage image decomposition tube with built-in secondary electron multiplier and a frame or ring which represents the first impact stage and is arranged in front of the storage electrode |
| US2322807A (en) * | 1940-12-28 | 1943-06-29 | Rca Corp | Electron discharge device and system |
| US2404046A (en) * | 1941-06-21 | 1946-07-16 | Rca Corp | Television transmitting apparatus |
| GB665877A (en) * | 1948-02-03 | 1952-01-30 | Emi Ltd | Improvements in or relating to circuit arrangements embodying cathode ray tubes |
| US2579351A (en) * | 1949-08-30 | 1951-12-18 | Rca Corp | Isocon pickup tube |
| US2548118A (en) * | 1950-05-01 | 1951-04-10 | Rca Corp | Art of analyzing optical images |
-
0
- NL NL7107545.A patent/NL165997B/en unknown
-
1950
- 1950-12-16 GB GB30712/50A patent/GB711275A/en not_active Expired
-
1951
- 1951-12-14 FR FR1051489D patent/FR1051489A/en not_active Expired
- 1951-12-15 DE DEE4777A patent/DE944558C/en not_active Expired
- 1951-12-15 US US261804A patent/US2740918A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2740918A (en) | 1956-04-03 |
| NL165997B (en) | |
| DE944558C (en) | 1956-06-21 |
| FR1051489A (en) | 1954-01-15 |
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