GB905057A - Photo-electric reading device for an information bearer with marking-grid areas - Google Patents
Photo-electric reading device for an information bearer with marking-grid areasInfo
- Publication number
- GB905057A GB905057A GB274961A GB274961A GB905057A GB 905057 A GB905057 A GB 905057A GB 274961 A GB274961 A GB 274961A GB 274961 A GB274961 A GB 274961A GB 905057 A GB905057 A GB 905057A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- cells
- space
- marking
- sensing
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/01—Details
- G06K7/016—Synchronisation of sensing process
- G06K7/0163—Synchronisation of sensing process by means of additional timing marks on the record-carrier
Landscapes
- Engineering & Computer Science (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Optical Recording Or Reproduction (AREA)
- Credit Cards Or The Like (AREA)
Abstract
905,057. Sensing record-cards. DE STAAT DER NEDERLANDEN TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEUR - GENERAAL DER POSTERIJEN, TELEGRAPHIE EN TELEFONIE. Jan. 24, 1961 [Feb. 3, 1960], No. 2749/61. Class 106 (1). A record card as described in Specification 845,050, having a number of columns of marking spaces each being in a light colour on a different coloured background, one of the spaces being filled in to indicate the data and each column having a synchronizing mark, is sensed by two identical sensing stations A, B, Fig. 1, each consisting of a row of photo-cells a-u equal in size to a marking space or the distance between them, the synchronizing marks being sensed by a group of three smaller photocells x, y, z and their outputs determine which of the photo-cells a-u shall be connected to storage means, the data stored from the two sensing stations A, B being compared. The transverse registry of the record is determined by the combination of photo-cells x, y and z which detect the synchronizing mark. The three signals are combined in circuit PS, Fig. 2, to produce an output on one of five lines 11-15, enabling one of five groups of gates. These correspond to normal registry (N) and displacements left (L), right (R), extreme left (UL) and extreme right (UR). To each of these groups of ten gates are connetted the appropriate ten of the data-sensing photo-cells a-u and there are ten output leads of which one will be marked according to the position of the filled-in space in the column being sensed to set one of ten triggers I-X. Stations A and B set the two groups of triggers I-X and Ia-Xa and these are compared at VG. A checking circuit C checks the one and only one of the triggers Ia-Xa is set. The background colour, e.g. a partially saturated red is such that it produces the same response in the photo-cell as an unfilled space. A filled space therefore produces a distinguishable signal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL248047 | 1960-02-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB905057A true GB905057A (en) | 1962-09-05 |
Family
ID=19752153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB274961A Expired GB905057A (en) | 1960-02-03 | 1961-01-24 | Photo-electric reading device for an information bearer with marking-grid areas |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB905057A (en) |
NL (2) | NL121019C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1225909B (en) * | 1963-12-31 | 1966-09-29 | Nederlanden Staat | Photoelectric scanning device for recording media with manually blackened marker areas |
DE1234063B (en) * | 1965-07-17 | 1967-02-09 | Siemens Ag | Device for scanning control for strip scanners working step by step |
-
0
- NL NL248047D patent/NL248047A/xx unknown
- NL NL121019D patent/NL121019C/xx active
-
1961
- 1961-01-24 GB GB274961A patent/GB905057A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1225909B (en) * | 1963-12-31 | 1966-09-29 | Nederlanden Staat | Photoelectric scanning device for recording media with manually blackened marker areas |
DE1234063B (en) * | 1965-07-17 | 1967-02-09 | Siemens Ag | Device for scanning control for strip scanners working step by step |
Also Published As
Publication number | Publication date |
---|---|
NL248047A (en) | |
NL121019C (en) |
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