GB385591A - Improvements in or relating to electro-optical transmission - Google Patents
Improvements in or relating to electro-optical transmissionInfo
- Publication number
- GB385591A GB385591A GB9035/31A GB903531A GB385591A GB 385591 A GB385591 A GB 385591A GB 9035/31 A GB9035/31 A GB 9035/31A GB 903531 A GB903531 A GB 903531A GB 385591 A GB385591 A GB 385591A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- per cent
- reactance
- filling
- new york
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/66—Transforming electric information into light information
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/20—Selection of substances for gas fillings; Specified operating pressures or temperatures
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
385,591. Discharge lamps; valve circuits. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A.-(Assignees of Gray, F. ; 243, West 101st Street, New York, U.S.A.) March 24, 1931, No. 9035. Convention date, April 8, 1930. Void [Published under Sect. 91 of the Acts]. Drawings to Specification. [Classes 39 (i) and 40 (v).] In systems for converting electric oscillations into light variations, applicable to television and sound recording, the glow-discharge lamp producing the light variations has a filling of inert gas with a small addition of active gas. The filling may be neon with 1-10 per cent of hydrogen, less than 5 per cent and preferably 1-2 per cent being specified. As compared.with lamps filled with pure rare gas, time-lag is reduced, the resistance of the lamp is more constant, its reactance more nearly proportional to the frequency of the currents and its impedance lower, also the phase shift between current and voltage due to the lamp is proportional to the frequency in the working range, say 10,000-20,000 cycles per second. The lamp is used in the anode circuit of an amplifying valve, the circuit having a constant impedance high compared with that of the lamp. Details of the reactance &c. of the lamp in a television receiver for modulated carrier waves are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US442431A US1871266A (en) | 1930-04-08 | 1930-04-08 | Electrooptical transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB385591A true GB385591A (en) | 1932-12-29 |
Family
ID=23756770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9035/31A Expired GB385591A (en) | 1930-04-08 | 1931-03-24 | Improvements in or relating to electro-optical transmission |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1871266A (en) |
| FR (1) | FR714897A (en) |
| GB (1) | GB385591A (en) |
-
1930
- 1930-04-08 US US442431A patent/US1871266A/en not_active Expired - Lifetime
-
1931
- 1931-03-24 GB GB9035/31A patent/GB385591A/en not_active Expired
- 1931-04-07 FR FR714897D patent/FR714897A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1871266A (en) | 1932-08-09 |
| FR714897A (en) | 1931-11-21 |
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