US3718823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical detectors for inspecting the condition of samples
Assignee: Toshiba Corp
•
Filing: 1971-11-08
•
Granted: 1973-02-27
•
Expires: 1991-11-08
Abstract
Abstract To inspect the condition of a sample, for example a paper money, there are provided a conveyor for successively conveying the sample along a predetermined path; optical means including a source of light disposed on one side of the conveyor for projecting light upon a predetermined area containing a predetermined portion, e.g., the margin of the sample, and a photoelectric transducer on the opposite side and including a plurality of juxtaposed unit elements for producing electric outputs proportional to the quantity of light impinging thereon; and a selection circuit responsive to the outputs from respective unit elements for selecting the output only from a particular unit element corresponding to the predetermined portion of the sample irrespective of the deviation of the position of the sample from said path.
Inventors
- 👤 I Niikura
- 👤 H Arita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:40
CPC Classifications
G; G07; G07D; G07D7/00; G07D7/181; G07D7/187; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/95; G01N21/956; G07D7/06; G07D7/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
An optical detector for inspecting the condition of a sample comprising conveyor means for successively conveying said sample along a predetermined path; optical means including a source of light disposed on one side of said path for projecting light upon a predetermined area containing a predetermined portion of said sample, and a photoelectric transducer disposed on the opposite side of said path for receiving the light transmitted through said area; said photoelectric transducer including a plurality of juxtaposed unit elements each producing an electric output proportional to the quantity of light impinging thereon; and a selection circuit responsive to outputs from respective unit elements of said photoelectric transducer for selecting the output only from a particulAr unit element corresponding to said predetermined portion of said sample irrespective of the deviation of the position of said sample from said path.
Claim 2
Dependent Claim
139 words
An optical detector for inspecting the condition of a sample comprising conveyor means for successively conveying said sample along a predetermined path; optical means including a source of light disposed on one side of said path for projecting light upon a predetermined area containing a predetermined portion of said sample, and a photoelectric transducer disposed on the opposite side of said path for receiving the light transmitted through said area; said photoelectric transducer including a plurality of juxtaposed unit elements each producing an electric output proportional to the quantity of light impinging thereon; and a selection circuit responsive to outputs from respective unit elements of said photoelectric transducer for selecting the output only from a particulAr unit element corresponding to said predetermined portion of said sample irrespective of the deviation of the position of said sample from said path.
Claim 3
Dependent Claim
31 words
An optical detector according to claim 1 wherein said sample comprises a printed matter having a definite pattern printed on the central portion and a not printed margin around its periphery.
Claim 4
Dependent Claim
31 words
An optical detector according to claim 1 wherein said sample comprises a printed matter printed with a definite pattern having relatively bright and dark portions divided by a definite border line.
Claim 5
Dependent Claim
23 words
An optical detector according to claim 2 wherein said light is projected upon an area including said margin and portions outside said margin.
Claim 6
Dependent Claim
20 words
An optical detector according to claim 4 wherein said samples are carried by said conveyor means with said margins exposed.
Claim 7
Dependent Claim
31 words
An optical detector according to claim 3 wherein said light is projected upon a predetermined area of said printed pattern including said bright and dark portions and said border line therebetween.
Claim 8
Dependent Claim
127 words
An optical detector according to claim 1 wherein said selection circuit comprises a plurality of quantizing circuits for quantizing the outputs from said plurality of unit elements of said photoelectric transducer, a plurality of first AND circuits, one of the inputs of each AND circuit being connected to the output of corresponding one of said quantizing circuits through an inverter while the other of said inputs being connected to the output of the next quantizing circuit, and a plurality of second AND circuits, one of the inputs of each second AND circuit being connected to the output of a corresponding one of said first AND circuit while the other input of said each second AND circuit being connected to the output of a preceding first AND circuit.
Claim 9
Dependent Claim
25 words
An detector device according to claim 6 wherein said selection circuit further comprises an OR circuit connected to the outputs of said second AND circuits.
Claim 10
Dependent Claim
28 words
An detector device according to claim 6 wherein said selection circuit further comprises a comparator which compares the outputs from said second AND circuit and a reference signal.
Claim 11
Dependent Claim
22 words
An detector device according to claim 8 wherein said reference signal represents a normal condition of said predetermined portion of said sample.
References Cited (Backward Citations)
US3621266A
Cited
US3628025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |