US3560718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marked grid reading and testing device
Assignee: Government of Netherlands
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Filing: 1968-12-10
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Granted: 1971-02-02
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Expires: 1988-12-10
Abstract
Abstract A device for reading marked areas on a grid on an information bearer comprising means for moving the bearer past a first reading means having a low sensitivity reader, storing and testing the results read for completeness, and then moving the bearer past a second reading means with a high sensitivity reader, and, if the first read results were not complete, storing and testing the reread results for completeness. The circuit of the reader which controls the device includes AND- and OR-gates, and cam-operated sequence switches for the successive operation of the reading stations, to each of which switches are connected delay devices and pulse shapers for controlling a single shiftregister type memory or storing device and the completeness tester. This tester in turn operates separate triggers for (a) blocking the operation of the second or high sensitivity reader when the information stored in the memory or storing device has been tested to be complete as a result of the information read from the first or low sensitivity reader, and for (b) diverting the movement of the information bearer when the second or high sensitivity reader still tests the reread information to be incomplete.
Inventors
- 👤 Arie Adriaan Spanjersberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:19
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
161 words
A device for reading marked areas on a grid on an information bearer (B), comprising: a. a low sensitivity photoelectric reading station (L), b. a high sensitivity photoelectric reading station (H), c. means (C, C'') to move said information bearer successively past said reading stations, d. means (M) connected to said reading stations for storing first the information read from said bearer by said low sensitivity reading station and then by said high sensitivity reading station, e. means (CT) connected to said storing means for testing the information stored in said storing means for completeness immediately after it is stored therein, f. means (T1) connected to said testing means for blocking the storing of said read information from said high sensitivity reading station when the first stored information from said low sensitivity reading station has been tested to be complete, and g. means (13) for obliterating said stored information from said storing means after it has been tested to be incomplete.
Claim 2
Independent Claim
161 words
A device for reading marked areas on a grid on an information bearer (B), comprising: a. a low sensitivity photoelectric reading station (L), b. a high sensitivity photoelectric reading station (H), c. means (C, C'') to move said information bearer successively past said reading stations, d. means (M) connected to said reading stations for storing first the information read from said bearer by said low sensitivity reading station and then by said high sensitivity reading station, e. means (CT) connected to said storing means for testing the information stored in said storing means for completeness immediately after it is stored therein, f. means (T1) connected to said testing means for blocking the storing of said read information from said high sensitivity reading station when the first stored information from said low sensitivity reading station has been tested to be complete, and g. means (13) for obliterating said stored information from said storing means after it has been tested to be incomplete.
Claim 3
Dependent Claim
40 words
A device according to claim 1 including: h. means for diverting said bearer after it passes said high sensitivity reading station when said testing means has tested the stored information read from said high sensitivity reading station to be incomplete.
Claim 4
Dependent Claim
30 words
A device according to claim 1 wherein said means for moving said information bearer includes cam-operated switches (S1, S2) for successively connecting the two reading stations to said storing means.
Claim 5
Dependent Claim
28 words
A device according to claim 3 wherein said testing means includes separate pulse-shaping circuits (D1, D2) responsive to said switches for controlling the output of said testing means.
Claim 6
Dependent Claim
36 words
A device according to claim 3 wherein said switches control separate delay circuits (Z1, Z2) for operating said blocking means and said obliterating means in order to compensate for the time for operating said testing means.
Claim 7
Dependent Claim
14 words
A device according to claim 1 wherein said blocking means comprises a trigger circuit.
Claim 8
Dependent Claim
17 words
A device according to claim 1 wherein said storing means comprises a shift register (I through X).
Claim 9
Dependent Claim
21 words
A device according to claim 1 wherein said completeness testing means comprises a plurality of one and only one type AND-gates.
Claim 10
Dependent Claim
47 words
A device according to claim 1 wherein the markable areas (MS) on said grid on said information bearer are arranged in a plurality of columns and rows at right angles to each other, and wherein a synchronization mark is provided opposite each row of said markable areas.
Claim 11
Dependent Claim
263 words
A reading device for an information bearer wherein said bearer comprises: at least one column of markable areas adjaceNt a column of synchronization marks, one for each area; said device comprising: a. means for moving said bearers successively through said device in the direction of said column, b. a first low sensitivity scanning means for producing impulses corresponding to marks in said column, c. a second high sensitivity scanning means for producing impulses from marks in said column, d. a memory means connected to both said scanning means for first storing the impulses from said first scanning means and then storing the impulses from said second scanning means, e. a completeness tester connected to said memory means for checking that said memory has one and only one impulse stored for each column after a bearer is scanned by said first scanning means, f. means connected to said completeness tester for preventing the response of said memory means to the impulses from said second scanning means when said memory means has been tested to be complete by said completeness tester, g. means connected to said completeness tester for resetting said memory means and permitting the response of said memory means to the impulses from said second scanning means when said memory means has been tested to be incomplete by said completeness tester, and h. means connected to said completeness tester for diverting said bearer from its normal movement through said device when said memory means has been tested to be incomplete by said completeness tester in response to impulses from said second scanning means.
Claim 12
Dependent Claim
263 words
A reading device for an information bearer wherein said bearer comprises: at least one column of markable areas adjaceNt a column of synchronization marks, one for each area; said device comprising: a. means for moving said bearers successively through said device in the direction of said column, b. a first low sensitivity scanning means for producing impulses corresponding to marks in said column, c. a second high sensitivity scanning means for producing impulses from marks in said column, d. a memory means connected to both said scanning means for first storing the impulses from said first scanning means and then storing the impulses from said second scanning means, e. a completeness tester connected to said memory means for checking that said memory has one and only one impulse stored for each column after a bearer is scanned by said first scanning means, f. means connected to said completeness tester for preventing the response of said memory means to the impulses from said second scanning means when said memory means has been tested to be complete by said completeness tester, g. means connected to said completeness tester for resetting said memory means and permitting the response of said memory means to the impulses from said second scanning means when said memory means has been tested to be incomplete by said completeness tester, and h. means connected to said completeness tester for diverting said bearer from its normal movement through said device when said memory means has been tested to be incomplete by said completeness tester in response to impulses from said second scanning means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |