GB1318185A - Bank-note detector - Google Patents
Bank-note detectorInfo
- Publication number
- GB1318185A GB1318185A GB3422569A GB1318185DA GB1318185A GB 1318185 A GB1318185 A GB 1318185A GB 3422569 A GB3422569 A GB 3422569A GB 1318185D A GB1318185D A GB 1318185DA GB 1318185 A GB1318185 A GB 1318185A
- Authority
- GB
- United Kingdom
- Prior art keywords
- note
- green
- photo
- strip
- areas
- 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
- 238000012360 testing method Methods 0.000 abstract 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 2
- 238000003780 insertion Methods 0.000 abstract 2
- 230000037431 insertion Effects 0.000 abstract 2
- 230000007935 neutral effect Effects 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
- 230000001960 triggered effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/121—Apparatus characterised by sensor details
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
1318185 Banknote validator BRECKNELLREDCLIFFE ELECTRONICS Ltd 5 June 1970 [7 July 1969] 34225/69 Heading G4X [Also in Division G1] A banknote validator comprises photo-electric apparatus which measures the light transmission (optical density) and colour of the note at various parts of its surface and discriminator and gating circuitry to give an output only if the note is acceptable according to predetermined criteria. This apparatus is associated with a device for detecting the presence of an inset silver strip in the banknote. A gating circuit is provided to receive the outputs of the latter device and the photo-electric detector to give an output only when both the optical and the strip tests are satisfied. A drawer for delivery of the note to the test station is described Fig. 2. Photo-electric evaluation.-In a particular arrangement described with reference to the circuit diagram of Fig. 1 (not shown), five areas of the note are examined. A single lamp may illuminate all the areas of the note or individual lamps may be provided for each area. A photoresistor, photo-voltage device or phototransistor detects the transmitted light, there being provided in the respective paths: a neutral or grey filter (for monitoring a white area); two red filters (for two reds or brown areas); two green filters (for two green areas). In a modification utilized with the drawer of Fig. 2 there are six monitored areas and corresponding photoelectric stations using: red and green filters (for two dark green areas); a red filter (for a light blue/green area); a green filter (for a light blue/ green/brown area); a green filter (for a medium density green area); a neutral filter (for a white area used for compensating for soiled notes by adjusting the supply to the other five photo-cells). Each photo-cell is coupled via transistors to Schmitt triggers setting the upper and lower amplitude acceptance levels for that station. The triggers feed a system of AND-gates and a locking gate circuit. Silver strip detector.-When the note is in the test position a central transmitter electrode is positioned over the strip and this is supplied by a crystal controlled transistor oscillator delivering at about 27 MHz. Induced currents in the strip are picked up by receiver electrodes, two being provided, each spaced about half an inch from the end of the strip, in case of breaks in the strip. The received signals are fed to mixer transistor, the output of which is filtered, amplified detected and fed to an output transistor coupled to a locking gate circuit. Insertion of banknote.-The note may be conveyed by bands or rollers, triggered by a photo-electric presence sensor, which may continue (for acceptance) or reverse (for rejection) after the stationary test period. Alternatively, the user himself inserts the note into the test position by means of a flapped drawer, Fig. 2. A microswitch senses this insertion and starts the tests. If the note passes these within a predetermined timed period, a plunger plate pushes the noted down through a slot in its supporting plate. If it does not, a spring bias returns the drawer to its rest position for removal of the note by the user. An indicator (good or bad note) may be provided.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3422569 | 1969-07-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1318185A true GB1318185A (en) | 1973-05-23 |
Family
ID=10362971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3422569A Expired GB1318185A (en) | 1969-07-07 | 1969-07-07 | Bank-note detector |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1318185A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2170939A (en) * | 1985-01-21 | 1986-08-13 | Christopher William Yeomans | Bank note counterfeit detection device |
US5367577A (en) * | 1989-08-18 | 1994-11-22 | Datalab Oy | Optical testing for genuineness of bank notes and similar paper bills |
-
1969
- 1969-07-07 GB GB3422569A patent/GB1318185A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2170939A (en) * | 1985-01-21 | 1986-08-13 | Christopher William Yeomans | Bank note counterfeit detection device |
US5367577A (en) * | 1989-08-18 | 1994-11-22 | Datalab Oy | Optical testing for genuineness of bank notes and similar paper bills |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |