GB616246A - Mechanical scanning devices for television, facsimile transmission and remote control - Google Patents
Mechanical scanning devices for television, facsimile transmission and remote controlInfo
- Publication number
- GB616246A GB616246A GB493244A GB493244A GB616246A GB 616246 A GB616246 A GB 616246A GB 493244 A GB493244 A GB 493244A GB 493244 A GB493244 A GB 493244A GB 616246 A GB616246 A GB 616246A
- Authority
- GB
- United Kingdom
- Prior art keywords
- holes
- slots
- discs
- disc
- television
- 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
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
- H04N3/04—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving aperture also apertures covered by lenses
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimiles In General (AREA)
Abstract
616,246. Mechanical scanning arrangements. ROWELL, J. W. March 16, 1944, No. 4932. [Class 40 (iii)] Scanning means for television or facsimile or for use as a light chopper comprises a pair of discs 100, 101, which are mounted about spaced axes 150, 151 and rotated in opposite directions, the disc 100 having inclined rows of holes or slots such as 1 to 36 and the disc 101 having correspondingly numbered rows of holes or slots disposed in spiral formation, so that, as the discs rotate, the intersections of the slots or lines of holes in the two discs scan an area lying about the line joining the axes, the direction of scan being parallel to that line. To manufacture discs, a master disc 100 is employed with a suitable straight-edge guide for forming the holes or slots in a master disc 101, and the two master discs may be copied photographically. The rows of holes or slots in the disc 101 are preferably cut so as to produce interlaced scanning, the lines being scanned in the order 1, 3, 2, 4, 6, 5 &c.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US349944A US2343931A (en) | 1940-08-02 | 1940-08-02 | Mechanical scanning device for television and remote control |
| GB493244A GB616246A (en) | 1944-03-16 | 1944-03-16 | Mechanical scanning devices for television, facsimile transmission and remote control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB493244A GB616246A (en) | 1944-03-16 | 1944-03-16 | Mechanical scanning devices for television, facsimile transmission and remote control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB616246A true GB616246A (en) | 1949-01-19 |
Family
ID=9786569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB493244A Expired GB616246A (en) | 1940-08-02 | 1944-03-16 | Mechanical scanning devices for television, facsimile transmission and remote control |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB616246A (en) |
-
1944
- 1944-03-16 GB GB493244A patent/GB616246A/en not_active Expired
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