GB574078A - Improvement in method and apparatus for recording signals electrically - Google Patents
Improvement in method and apparatus for recording signals electricallyInfo
- Publication number
- GB574078A GB574078A GB21930/43A GB2193043A GB574078A GB 574078 A GB574078 A GB 574078A GB 21930/43 A GB21930/43 A GB 21930/43A GB 2193043 A GB2193043 A GB 2193043A GB 574078 A GB574078 A GB 574078A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- tube
- recording
- circuit
- dec
- 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
- 238000010894 electron beam technology Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Microwave Tubes (AREA)
Abstract
574,078. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Dec. 31, 1943, No. 21930. Convention date, Dec. 31, 1942. [Class 39 (i)] [Also in Group XXXVI] A signal-recording device includes a cathoderay tube 1 having beam-deflecting means 11 which cause the electron beam to sweep over a number of mutually insulated target electrodes 21, each of which has an individual connection to the exterior of the tube. A record blank 27 is fed past the end of the tube and sparks between the external end of an electrode on which the beam is falling and a spark bar 25 mark the recording strip. The signal connection to the recording circuit is at point 45. This affects the deflecting plates 11 and also affects the control electrode 5 of the electron gun to vary the intensity of the electron beam. In the circuit shown two amplifiers 51 are connected in push-pull relation and their output is connected to electrode 5 through a network of four rectifiers 57 and 59. A rectifier 65 is provided in circuit with electrode 5 to prevent it being driven too positive to an extent that would defocus the beam.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US574078XA | 1942-12-31 | 1942-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB574078A true GB574078A (en) | 1945-12-19 |
Family
ID=22010402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21930/43A Expired GB574078A (en) | 1942-12-31 | 1943-12-31 | Improvement in method and apparatus for recording signals electrically |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB574078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3157811A (en) * | 1960-03-14 | 1964-11-17 | Dick Co Ab | Electrostatic printing tube having unique anode structure |
-
1943
- 1943-12-31 GB GB21930/43A patent/GB574078A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3157811A (en) * | 1960-03-14 | 1964-11-17 | Dick Co Ab | Electrostatic printing tube having unique anode structure |
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