US3711655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for converting information recorded on a magnetic recording sheet into visible information
Assignee: Ricoh Co Ltd
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Filing: 1971-01-15
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Granted: 1973-01-16
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Expires: 1991-01-15
Abstract
Abstract A rotatably mounted drum is arranged to support a recording sheet with the columns of recorded information extending substantially axially of the drum, and a magnetic reproducing head is cooperable with the recording sheet and is mounted for movement axially of the drum. Photoelectric transducer means are operatively associated with the drum and aligned with the respective columns of recorded information. Printing mechanisms, equal in number, preferably to the number of photoelectric transducer means are arranged in adjacent relation, and each printing mechanism is operative responsive to cojoint operation of a respective photoelectric transducer means and detection of an information bit by the reproducing head. In one embodiment of the invention, a light source is arranged within the drum adjacent an aperture in the drum wall, and photoelectric transducers are arranged circumferentially of the drum for consecutive activation by the light source as the drum rotates. The photoelectric transducers are connected in parallel with each other to the reproducing head and each transducer is connected to the operating means of a respective printing mechanism. In another embodiment of the invention, a single light source is operatively associated with a single photoelectric transducer, and the drum is formed with a series of apertures extending circumferentially thereof, in a common radial plane with the light source and the photoelectric transducer, each aperture being associated with a particular column of recorded information. the reproducing head and the photoelectric transducer are connected to the input of an AND circuit whose output is connected to a diode matrix which is controlled by a reset type flip-flop, and the diode matrix is connected to the operating means of the respective printing mechanisms.
Inventors
- 👤 I Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
327 words
Apparatus for reproducing information, recorded on a magnetic recording sheet in columns with correspondingly located information bits in adjacent columns being aligned with each other, comprising, in combination, a rotatably mounted drum having means to support a recording sheet on its outer surface with the columns of recorded information extending substantially axially of said drum and with the aligned correspondingly located information bits defining a helical locus; a magnetic reproducing head cooperable with a recording sheet mounted on said drum, said head being mounted for movement axially of said drum to track such helical locus; means operable to rotate said drum and simultaneously to shift said head axially of said drum; photoelectric transducer means extending circumferentially of said drum with each column of recorded information on the sheet mounted on said drum having a respective transducer means axially aligned therewith; each photoelectric transducer means including, as elements, a light source, a photoelectric transducer and an aperture in the circumferential wall of said drum, said elements being arranged on a common radial plane of said drum with the light source and photoelectric transducer on opposite sides of said circumferential wall; the number of at least one of said elements being at least equal to the number of columns of recorded information of a magnetic recording sheet mounted on said drum; whereby a photoelectric transducer means is operated whenever a light source, an aperture and a photoelectric transducer are radially aligned each time said reproducing head is aligned with a respective column; a pluraliTy of printing mechanisms arranged in adjacent relation in a number equal to the number of said photoelectric switch means, each printing mechanism being operatively associated with a respective photoelectric transducer means; and respective means operable, responsive to operation of a photoelectric transducer means simultaneously with detection of a scanned information bit in the associated column by said reproducing head, to actuate the respective printing mechanism to print a visible information bit on a printing sheet.
Claim 2
Dependent Claim
327 words
Apparatus for reproducing information, recorded on a magnetic recording sheet in columns with correspondingly located information bits in adjacent columns being aligned with each other, comprising, in combination, a rotatably mounted drum having means to support a recording sheet on its outer surface with the columns of recorded information extending substantially axially of said drum and with the aligned correspondingly located information bits defining a helical locus; a magnetic reproducing head cooperable with a recording sheet mounted on said drum, said head being mounted for movement axially of said drum to track such helical locus; means operable to rotate said drum and simultaneously to shift said head axially of said drum; photoelectric transducer means extending circumferentially of said drum with each column of recorded information on the sheet mounted on said drum having a respective transducer means axially aligned therewith; each photoelectric transducer means including, as elements, a light source, a photoelectric transducer and an aperture in the circumferential wall of said drum, said elements being arranged on a common radial plane of said drum with the light source and photoelectric transducer on opposite sides of said circumferential wall; the number of at least one of said elements being at least equal to the number of columns of recorded information of a magnetic recording sheet mounted on said drum; whereby a photoelectric transducer means is operated whenever a light source, an aperture and a photoelectric transducer are radially aligned each time said reproducing head is aligned with a respective column; a pluraliTy of printing mechanisms arranged in adjacent relation in a number equal to the number of said photoelectric switch means, each printing mechanism being operatively associated with a respective photoelectric transducer means; and respective means operable, responsive to operation of a photoelectric transducer means simultaneously with detection of a scanned information bit in the associated column by said reproducing head, to actuate the respective printing mechanism to print a visible information bit on a printing sheet.
Claim 3
Dependent Claim
45 words
Apparatus for reproducing information, as claimed in claim 1, in which the angular spacing of said photoelectric transducer means, relative to the axis of said drum, is equal to the angular spacing of the columns of recorded information on the sheet mounted on said drum.
Claim 4
Dependent Claim
81 words
Apparatus for reproducing information, as claimed in claim 2, in which there is a single light source arranged on one side of said circumferential wall in fixed relation to a single aperture in said circumferential wall; said photoelectric transducers being disposed circumferentially of said drum on the opposite side of said circumferential wall, and the number of said photoelectric transducers being at least equal to the number of columns of recorded information on the magnetic recording sheet mounted on said drum.
Claim 5
Dependent Claim
64 words
Apparatus for reproducing information, as claimed in claim 3, in which each photoelectric transducer is connected in series with a respective means operable to actuate a respective printing mechanism; said photoelectric transducers being connected in parallel to said reproducing head and serving as switch means controlling transmission of output pulses from said reproducing head to said means operable to actuate the respective printing mechanisms.
Claim 6
Dependent Claim
62 words
Apparatus for reproducing information, as claimed in claim 4, in which each of said respective means operable to actuate the respective printing mechanisms comprises an electromagnet and a pivoted armature connected to a respective printing mechanism; each electromagnet being energized responsive to receipt of a pulse from said reproducing head and remaining deenergized in the absence of pulses from said reproducing head.
Claim 7
Dependent Claim
102 words
Apparatus for reproducing information, as claimed in claim 2, in which said photoelectric transducer means includes a single light source and a single photoelectric transducer arranged in radial alignment on opposite sides of said circumferential wall of said drum, and a plurality of apertures extending circumferentially of said drum and in a number at least equal to the number of columns of recorded information on the magnetic recorded sheet mounted on said drum; and switching means operable in synchronism with the rotation of said drum to connect said photoelectric transducer successively to said respective means operable to actuate the respective printing mechanisms.
Claim 8
Dependent Claim
55 words
Apparatus for reproducing information, as claimed in claim 6, including an AND circuit having an output connected to said switch means, a first input connected to said photoelectric transducer and a second input connected to said reproducing head; said AND circuit transmitting an operating pulse to said switch means only responsive to pulses applied simultaneously
Claim 9
Dependent Claim
80 words
Apparatus for reproducing information, as claimed in claim 7, in which said respective means operable to actuate the respective printing mechanisms comprises respective electromagnets each having operatively associated therewith a pivoted armature connected to the associated printing mechanism; said switch means comprising a plurality of fixed contacts each connected to a respective electromagnet, and a rotatable contact connected to the output of said AND circuit and rotated in synchronism with rotation of said drum and successively engaging said fixed contacts.
Claim 10
Dependent Claim
63 words
Apparatus for reproducing information, as claimed in claim 7, in which said respective means operable to actuate the respective mechanisms comprises respective electromagnets eacH having a respective armature operatively associated therewith and connected to the associated printing mechanisms; said switch means comprising a diode matrix having respective outputs connected to respective electromagnets, and an input connected to the output of said AND circuit.
Claim 11
Dependent Claim
76 words
Apparatus for reproducing information, as claimed in claim 9, including flip-flop means connected to said diode matrix and to said reproducing head and controlling shifting of the outputs of said diode matrix; and reset means connected to said flip-flop means and to said reproducing head to reset said flip-flop means each time said reproducing head has completed one scanning of all of the columns of recorded information on the magnetic recording sheet mounted on said drum.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |