US3566085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric reading apparatus
Assignee: Toshiba Corp
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Filing: 1968-12-13
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Granted: 1971-02-23
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Expires: 1988-12-13
Abstract
Abstract A photoelectric reading apparatus for tapes perforated with sprocket apertures and data apertures is provided with an additional photoelectric element for the sprocket apertures and with AND circuits corresponding in number to data flip-flop circuits and connected between the data flip-flop circuits and an external apparatus. A sprocket flip-flop circuit is reset when the additional element detects the latter edge of its corresponding sprocket aperture, thus supplying an input to one input terminal of an AND circuit connected with the set terminal of a start-and-stop flip-flop circuit. The other input terminal of the AND circuit is rendered open when a stop order is supplied thereto. Once the start-and-stop flip-flop circuit is set, data signals are never supplied from the data flip-flop circuits to the external apparatus even when the sprocket flip-flop circuit is set due to undesired vibrations of the perforated tapes.
Inventors
- 👤 Etsuro Nagata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:09
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/01; G06K7/016; G06K7/0163; G06F; G06F3/00; G06F3/06; G06K7/10; G06K7/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
352 words
A photoelectric apparatus for reading information stored in a movable tape perforated with sprocket apertures and data apertures of a channel, comprising an illuminating means, a photoelectric conversion element for detecting the sprocket apertures, a corresponding nuMber of photoelectric conversion elements to said channel for reading signals representing the data apertures, a sprocket flip-flop circuit, a first means connected between the sprocket flip-flop circuit and the element for detecting the sprocket aperture thereby to set or reset said sprocket flip-flop circuit, a corresponding number of data flipflop circuits to said channel, a second means connected between the data flip-flop circuits and data reading elements, a third means connected to the output terminal of the sprocket flip-flop circuit for supplying outputs from said sprocket flip-flop circuit to the second means, each of the second means being used in setting or resetting the corresponding ones of the data flipflop circuits in accordance with the signals from the third means, a flip-flop circuit for controlling the start and stop of reading, and a fourth means connected between the reading control flip-flop circuit and third means for setting said reading control flip-flop circuit, whereby outputs from the data flipflop circuits are supplied to an external means, characterized in that there is provided an additional photoelectric conversion element for detecting the sprocket aperture in such a manner that the distance between said additional photoelectric conversion element and first-mentioned sprocket aperture detecting element is not equal to an integral multiple of the fixed pitch between the sprocket apertures, the first means comprising a setting branch for the first-mentioned sprocket aperture detecting element and a resetting branch for the additional sprocket aperture detecting element; and that there are provided a corresponding number of AND circuits to the data flip-flop circuits, one input terminal of each of the AND circuits being connected to the corresponding output terminal of the data flipflop circuits, and the other input terminal of each of the AND circuits being connected in common to one output terminal of the reading control flip-flop circuit, the output terminals of the AND circuits being connected to the external means.
Claim 2
Dependent Claim
352 words
A photoelectric apparatus for reading information stored in a movable tape perforated with sprocket apertures and data apertures of a channel, comprising an illuminating means, a photoelectric conversion element for detecting the sprocket apertures, a corresponding nuMber of photoelectric conversion elements to said channel for reading signals representing the data apertures, a sprocket flip-flop circuit, a first means connected between the sprocket flip-flop circuit and the element for detecting the sprocket aperture thereby to set or reset said sprocket flip-flop circuit, a corresponding number of data flipflop circuits to said channel, a second means connected between the data flip-flop circuits and data reading elements, a third means connected to the output terminal of the sprocket flip-flop circuit for supplying outputs from said sprocket flip-flop circuit to the second means, each of the second means being used in setting or resetting the corresponding ones of the data flipflop circuits in accordance with the signals from the third means, a flip-flop circuit for controlling the start and stop of reading, and a fourth means connected between the reading control flip-flop circuit and third means for setting said reading control flip-flop circuit, whereby outputs from the data flipflop circuits are supplied to an external means, characterized in that there is provided an additional photoelectric conversion element for detecting the sprocket aperture in such a manner that the distance between said additional photoelectric conversion element and first-mentioned sprocket aperture detecting element is not equal to an integral multiple of the fixed pitch between the sprocket apertures, the first means comprising a setting branch for the first-mentioned sprocket aperture detecting element and a resetting branch for the additional sprocket aperture detecting element; and that there are provided a corresponding number of AND circuits to the data flip-flop circuits, one input terminal of each of the AND circuits being connected to the corresponding output terminal of the data flipflop circuits, and the other input terminal of each of the AND circuits being connected in common to one output terminal of the reading control flip-flop circuit, the output terminals of the AND circuits being connected to the external means.
Claim 3
Dependent Claim
21 words
A photoelectric reading apparatus according to claim 1 wherein the setting branch of the first means includes a Schmidt trigger circuit.
Claim 4
Dependent Claim
21 words
A photoelectric reading apparatus according to claim 2 wherein the resetting branch of the first means includes a Schmidt trigger circuit.
Claim 5
Dependent Claim
48 words
A photoelectric reading apparatus according to claim 1 wherein said setting branch is responsive to a rising portion of a signal from said first-mentioned sprocket aperture detecting element, and said resetting branch is responsive to a falling portion of a signal from said additional sprocket aperture detecting element.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |