GB338799A - Improvements in and relating to arrangements for amplifying currents of photo-electric cells - Google Patents
Improvements in and relating to arrangements for amplifying currents of photo-electric cellsInfo
- Publication number
- GB338799A GB338799A GB1757/30A GB175730A GB338799A GB 338799 A GB338799 A GB 338799A GB 1757/30 A GB1757/30 A GB 1757/30A GB 175730 A GB175730 A GB 175730A GB 338799 A GB338799 A GB 338799A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- cell
- light
- arrangements
- relating
- 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
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
338,799. Lorenz Akt.-Ges., C. Feb. 11, 1929, [Convention date]. Copying-telegraphs.-To facilitate the amplification of currents produced by a, photo-electric cell Ph influenced by light reflected from a picture drum Z, the cell is constantly illuminated by an additional source of light G, the intensity of which varies in accordance with alternating current supplied to it. The light G may be a glow lamp, and the frequency of the alternating current is the desired carrier frequency. The cell Ph is connected through a battery B1 to a resistance R in the grid circuit of a valve R1. According to the Specification as open to inspection under Sect. 91 (3) (a), the source G may be an arc lamp or the like. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE338799X | 1929-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB338799A true GB338799A (en) | 1930-11-27 |
Family
ID=6222932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1757/30A Expired GB338799A (en) | 1929-02-11 | 1930-01-17 | Improvements in and relating to arrangements for amplifying currents of photo-electric cells |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1972221A (en) |
| FR (1) | FR688618A (en) |
| GB (1) | GB338799A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477307A (en) * | 1946-11-09 | 1949-07-26 | Mackta Leo | Combined x-ray and fluoroscopic apparatus |
| US2608128A (en) * | 1949-03-09 | 1952-08-26 | W M Welsh Mfg Company | Phototube amplification |
| US3214593A (en) * | 1961-08-28 | 1965-10-26 | Honeywell Inc | Component drift compensator |
| US10398192B2 (en) * | 2010-05-21 | 2019-09-03 | Samuel R. Hunter | Bicycle pedal system |
-
1929
- 1929-12-14 US US414189A patent/US1972221A/en not_active Expired - Lifetime
-
1930
- 1930-01-17 GB GB1757/30A patent/GB338799A/en not_active Expired
- 1930-01-21 FR FR688618D patent/FR688618A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1972221A (en) | 1934-09-04 |
| FR688618A (en) | 1930-08-27 |
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