Patent US5289508A successfully refreshed from Google Patents.
Patent EP0594450A2 successfully refreshed from Google Patents.
EP0594450A2
Expired / Lapsed
EP
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Cassettes and a mechanism and method for securing the recorded contents of their recording medium
Assignee: Sony Corp
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Filing: 1993-10-22
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Granted: —
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Expires: 2013-10-22
Abstract
Abstract A recorded data securing mechanism secures data recorded on a recording medium cassette provided with a memory and a data recording enable/disable tab at a predetermined position on the cassette. Breaking the recording enable/disable tab provided on the memory-based recording medium cassette prevents data recorded on the cassette from being written over and ensures that there will be no mismatch between the recording information stored in the memory of the cassette and the data recorded on the recording medium of the cassette. In one embodiment, rewriting is enabled but a memory mismatch flag is set if rewriting results in a mismatch.
Inventors
- 👤 Teruhiko C/O Sony Corporation Kori
- 👤 Hiroshi C/O Sony Corporation Yamazaki
- 👤 Harumi C/O Sony Corporation Kawamura
- 👤 Hisato C/O Sony Corporation Shima
- 👤 Kazuyuki C/O Sony Corporation Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:55
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/11; G11B15/00; G11B15/02; G11B15/04; G11B15/05; G11B15/06; G11B15/07; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08714; G11B27/34; G11B27/36; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/215; G11B2220/216; G11B2220/60; G11B2220/65; G11B2220/652; G11B2220/655; G11B2220/90
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
141 words
Apparatus for use with a cassette (1) and for securing data recorded on a recording medium housed in the cassette (1) wherein said cassette (1) is provided with data recording enable/disable means (2,3) which may be in a first state for normally enabling recording on said recording medium or a second state normally disabling recording on said recording medium and may or may not be provided with a memory (3) for storing information about data recorded on said recording medium, said apparatus comprising: recording means (8,9); state detecting means (5,6,7) for detecting the state of said enable/disable means (2,3); memory detecting means (6,5,13) for detecting whether or not said cassette (1) is provided with a memory (3); and microcomputer means (6) jointly responsive to said state detecting means (5,6,7) and said memory detecting means (6,5,13) for controlling said recording means (8,9).
Claim 2
Dependent Claim
141 words
Apparatus for use with a cassette (1) and for securing data recorded on a recording medium housed in the cassette (1) wherein said cassette (1) is provided with data recording enable/disable means (2,3) which may be in a first state for normally enabling recording on said recording medium or a second state normally disabling recording on said recording medium and may or may not be provided with a memory (3) for storing information about data recorded on said recording medium, said apparatus comprising: recording means (8,9); state detecting means (5,6,7) for detecting the state of said enable/disable means (2,3); memory detecting means (6,5,13) for detecting whether or not said cassette (1) is provided with a memory (3); and microcomputer means (6) jointly responsive to said state detecting means (5,6,7) and said memory detecting means (6,5,13) for controlling said recording means (8,9).
Claim 3
Dependent Claim
47 words
Apparatus according to claim 1 wherein in use when and only when said memory detecting means (6,5,13) detects that said cassette (1) is provided with a memory (3), the microcomputer means (6) controls said recording means (8,9) according to the detection of said state detecting means (7).
Claim 4
Dependent Claim
43 words
Apparatus according to claim 1 wherein said memory detecting means (13) is arranged to detect a feature (11) of said cassette (1), preferably an opening (11) in the cassette housing, indicating whether or not said cassette (1) is provided with a memory (3).
Claim 5
Dependent Claim
86 words
Apparatus for use with at least a first type of cassette (21) and for securing data recorded on a recording medium housed in the cassette (21) wherein said cassette (21) is provided with a memory (23) for storing information about data recorded on said recording medium, said apparatus comprising: recording means (28,29); microcomputer means (26) for controlling said recording means (28,29); and means (25,26) for recognizing a mismatch in said memory (23) between said data recorded on said recording medium and said information about said data.
Claim 6
Dependent Claim
86 words
Apparatus for use with at least a first type of cassette (21) and for securing data recorded on a recording medium housed in the cassette (21) wherein said cassette (21) is provided with a memory (23) for storing information about data recorded on said recording medium, said apparatus comprising: recording means (28,29); microcomputer means (26) for controlling said recording means (28,29); and means (25,26) for recognizing a mismatch in said memory (23) between said data recorded on said recording medium and said information about said data.
Claim 7
Dependent Claim
75 words
Apparatus according to claim 4 for use with a cassette further comprising data recording enable/disable means (22,23) which may be in a first state for normally enabling recording on said recording medium and a second state for normally disabling recording on said recording medium, said apparatus furthercom- prising state detecting means (25,26,27) for determining the state of said enable/disable means (22,23) and wherein said microcomputer means (26) is responsive to said state detecting means (25,26,27).
Claim 8
Dependent Claim
28 words
Apparatus according to claim 4 or 5 wherein the means for recognizing is for indicating a mismatch and/or the apparatus further comprises display means for displaying said mismatch.
Claim 9
Dependent Claim
43 words
Apparatus according to claim 4, 5 or 6 further comprising means responsive to said mismatch for rewriting all of the information in the memory (23) so that the information in the memory (23) matches the data recorded on the data recording medium (21).
Claim 10
Dependent Claim
31 words
Apparatus according to any one of claims 4 to 7 wherein said means for detecting a mismatch (26) is arranged to detect a flag in said memory (23) indicating a mismatch.
Claim 11
Dependent Claim
37 words
Apparatus according to any preceding claim wherein said memory (23) contains information enabling/disabling recording and said microcomputer means (26) controls said recording means to record in response thereto, regardless of the state of said enable/disable means (22,23).
Claim 12
Independent Claim
129 words
A method of securing data recorded on a recording medium housed in a cassette (1) wherein said cassette (1) is provided with data recording enable/disable means (2,3) having a first state for normally enabling recording on said recording medium and a second state normally disabling recording on said recording medium and may or may not be provided with a memory (3) for storing information about data recorded on said recording medium, said method comprising the steps of: determining the state of said enable/disable means (2,3); determining whether or not said cassette (1) is provided with a memory (3); and recording data on said recording medium taking into account both the state of said enable/disable means (2,3) and whether or not said cassette (1) is provided with a memory (3).
Claim 13
Independent Claim
129 words
A method of securing data recorded on a recording medium housed in a cassette (1) wherein said cassette (1) is provided with data recording enable/disable means (2,3) having a first state for normally enabling recording on said recording medium and a second state normally disabling recording on said recording medium and may or may not be provided with a memory (3) for storing information about data recorded on said recording medium, said method comprising the steps of: determining the state of said enable/disable means (2,3); determining whether or not said cassette (1) is provided with a memory (3); and recording data on said recording medium taking into account both the state of said enable/disable means (2,3) and whether or not said cassette (1) is provided with a memory (3).
Claim 14
Dependent Claim
123 words
A cassette apparatus (1) housing a recording medium, the cassette (1) optionally having a memory (3) for storing information about data recorded on said recording medium and having alternatively a) data recording enable/disable means (2,3) which may be in a first state for normally enabling recording on said recording medium or a second state for normally disabling recording on said recording medium and optionally comprising further means (11), preferably an opening or absence thereof, on the cassette housing indicating whether or not said cassette (1) is provided with a memory (3), or b) data recording disable means (2) having the first state: the apparatus optionally including packaging in which the cassette is located and, in this state, the recording medium optionally being blank.
Claim 15
Dependent Claim
123 words
A cassette apparatus (1) housing a recording medium, the cassette (1) optionally having a memory (3) for storing information about data recorded on said recording medium and having alternatively a) data recording enable/disable means (2,3) which may be in a first state for normally enabling recording on said recording medium or a second state for normally disabling recording on said recording medium and optionally comprising further means (11), preferably an opening or absence thereof, on the cassette housing indicating whether or not said cassette (1) is provided with a memory (3), or b) data recording disable means (2) having the first state: the apparatus optionally including packaging in which the cassette is located and, in this state, the recording medium optionally being blank.
Claim 16
Dependent Claim
27 words
Apparatus according to any preceding claim wherein said enable/disable means (2,3) comprises a tab (2) at a predetermined position and being removable at the time of manufacture.
Claim 17
Dependent Claim
36 words
Apparatus according to any preceding claim wherein said cassette (1) is not provided with a memory (3) and said enable/disable means (2,3) comprises a slidable tab (9,10,12,29,30) located at a predetermined position on said cassette (1).
Claim 18
Dependent Claim
27 words
A system comprising: apparatus according to any one of claims 1 to 9; and a cassette according to claim 11, 12 or 13 loaded in the apparatus.
References Cited (Backward Citations)
No citation records indexed.
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