GB2107106A - Disc players - Google Patents
Disc players Download PDFInfo
- Publication number
- GB2107106A GB2107106A GB08227119A GB8227119A GB2107106A GB 2107106 A GB2107106 A GB 2107106A GB 08227119 A GB08227119 A GB 08227119A GB 8227119 A GB8227119 A GB 8227119A GB 2107106 A GB2107106 A GB 2107106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- program information
- address
- pick
- partitions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/022—Programmed access in sequence to indexed parts of operating record carriers
- G11B21/025—Programmed access in sequence to indexed parts of operating record carriers of rotating discs
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/002—Programmed access in sequence to a plurality of record carriers or indexed parts, e.g. tracks, thereof, e.g. for editing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/005—Reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
- Optical Recording Or Reproduction (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Moving Of Head For Track Selection And Changing (AREA)
Abstract
A disc player is provided for reproducing an information signal from a disc 1 on which a plurality of program items are recorded together with address information in a predetermined address order sequence. The player includes a pickup device 3 for reading the program items and address information on the disc, a driving device 12 for moving the pick-up device 3, a deciphering circuit 7 for deciphering reproduced address data obtained from an output of the pick-up device 3, and a system controller 8 which controls the driving device 12 in response to an output of the deciphering circuit 7 so as to position the pick-up device 3 at the beginning of each of the program items and immediately after that to cause the pick-up device 3 to operate to read an initial portion of that program item for a predetermined short time in sequence in accordance with the predetermined address order. <IMAGE>
Description
SPECIFICATION
Disc players
This invention relates to disc players for reproducing an information signal from a disc, on which a plurality of program information partitions or sections are recorded together with address information, such as is known for digital audio discs.
The digital audio disc system is known as a system by which a reproduced audio signal of high quality can easily be obtained. In this system, a digital audio disc, that is a rotatable disc-shaped medium on which a digital audio signal is recorded as program information, is applied to a disc player so that the digital audio signal recorded on the disc is reproduced. The program information recorded on such a digital audio disc is usually accompanied by address information and, in reproducing the program information by means of a disc player, it is possible to reproduce selectively any one of a plurality of program information partitions recorded on the disc by utilizing the address information.
According to the present invention there is provided a disc player for reproducing an information signal from a disc on which a plurality of program information partitions are recorded together with address information in a predetermined address order sequence, the player comprising:
pick-up means for reading the program information partitions and address information recorded on the disc;
driving means for moving the pick-up means with respect to the surface of the disc;
deciphering means for deciphering reproduced address data contained in a reproduced signal obtained from the pick-up means; and
system control means for controlling the driving means in response to an output of the deciphering means so as to position the pick-up means at the beginning of each of the program information partitions on the disc in sequence in accordance with the predetermined address order and to cause the pick-up means to read an initial portion of each of the program information partitions for a predetermined short time immediately after the pick-up means is positioned at the beginning of each of the program information partitions.
Preferred embodiments of the present invention described hereinbelow can operate in a reproduction mode in which each of the program information partitions on a disc, for example a digital audio disc, is partially reproduced in sequence. In the sequential partial reproduction of the program information partitions by the preferred disc players, the initial portion of each of the program information partitions recorded on the disc is reproduced for a predetermined short time which is so arranged that the contents of each of the program information partitions can be discriminated or assumed therein sequentially in the order of the program information partitions on the disc by utilizing the address information accompanying the program information partitions.
As a result of this, the whole of the program information recorded on the disc can be reviewed within a relatively short time. This reproduction mode that can be effected in the preferred disc players embodying the present invention is hereinafter referred to as "catalogue reproduction".
The invention will now be further described, by way of illustrative and non-limiting example, with reference to the accompanying drawings, in which:
Figure 1 is a block diagram showing part of a disc player according to a first preferred embodiment of the present invention;
Figure 2 is a front view of the disc player; and
Figure 3 is a block diagram showing part of another disc player according to a preferred embodiment of the present invention.
Figure 1 shows an exemplary embodiment of a disc player according to the present invention. In this embodiment a disc 1 has recorded thereon program information containing a plurality of program information partitions or sections and address data accompanying each of the program information partitions. The disc 1 may for example comprise a digital audio disc on which an audio signal in the form of binary data including binary address data is recorded. The disc 1 is loaded on the disc player and rotated at a predetermined speed by a motor 2. The program information recorded on the disc 1 is read by a pick-up device. This embodiment is an optical disc player and the pick-up device is formed in an optical head 3.The optical head 3 projects laser light on to the disc 1 and receives from the disc reflected laser light which is modulated in response to the program information recorded on the disc. The reflected laser light passes through the optical head 3 and is guided to a photodetector 4 where photo-electric conversion is carried out in response to the reflected laser light at the photo-detector to produce a reproduced signal corresponding to the program information read by the optical head 3. The reproduced signal is shaped by a waveform shaping circuit 5 into an appropriate waveform so as to become a digital signal representing the program information, including the address data, and is then supplied to a decoder 6. The decoder 6 supplies a program information signal S in the form of binary data excluding the address data, and reproduced address data Q in the form of binary data.The reproduced address data Q represents the address given to the program information partition which is reproduced on that occasion. The program information signal S is fed to a circuit block (not shown in Figure 1) operative to process the program information signal S so as to obtain a desired reproduced audio signal, while the reproduced address data Q is supplied to a deciphering circuit 7. The deciphering circuit 7 deciphers the contents of the reproduced address data Q to produce an output signal P corresponding to the address of the program information partition reproduced on that occasion, and supplies it to a system controller 8.
A catalogue reproducing key 9 is provided for making the disc player perform catalogue reproduction. The catalogue reproducing key 9 is a push-button type and located at a control panel
1 1 provided on a cabinet 10 of the disc player together with other control buttons, as shown in
Figure 2, which is an outside front view of the disc player. When the catalogue reproducing key 9 is pushed, a catalogue reproducing command signal CT is supplied to the system controller 8 from the catalogue reproducing key and, as a result of this, the system controiler generates a control signal C for positioning the optical head 3 at the beginning end portion of an area of recorded information on the disc 1 and supplies it to a driving device 12 connected to the optical head 3.The driving device 1 2 moves the optical head 3 to a beginning end portion of the area of recorded information on the disc 1 in response to the control signal C,. Of course, if the optical head 3 is previously disposed at that position, the optical head 3 is not moved.
The area of recorded information on the disc 1 is in the form of a narrow pitch spiral track surrounding the centre of the disc and usually gives the address for the program information partitions so that the program information is to be reproduced from the inside to the outside of the area of recorded information. Accordingly, the optical head 3 is initially placed at the inside end portion of the recorded information area on the disc 1; in other words at the beginning end portion of an area where the first program information partition having a first address (address 1) is recorded. In this movement, the optical head 3 operates to read the program information containing the address data and the position of the optical head 3 is detected with reference to the output signal P of the deciphering circuit 7 at which the reproduced address data Q supplied at that time is deciphered.
The optical head 3 then commences reading the first program information partition having the address 1 in the normal reproducing mode or state and reproduction of the first program information partition having the address 1 is therefore started.
At this moment, the output signal P of the deciphering circuit 7 represents the address 1 and the system controller 8 supplies a starting signal
Ts to a timer 13 to make the timer 13 start operating, whereupon the timer 13 measures the time elapsed from commencement of the reproduction of the first program information partition having the address 1. The timer 13 overflows when its contents reach a predetermined short time to produce an overflow signal To, and the timer is reset, into a standby state.The time from the start of measuring to the overflow of the timer 13 is, for example, ten seconds, and can be set to by any other short time. The overflow signal To from the timer 13 is supplied to the system controller 8 and the system controller 8 generates and supplies to the driving device 12 a control signal C2 for moving the optical head 3 to the beginning end portion of the area where the second program information partition having a second address-(address 2) is recorded sequentially to the first program information partition. In response to the control signal C2, the driving device 1 2 moves the opticalhead 3 in the fast forward mode or state to the beginning end portion of the area where the second program information partition is recorded.
In this movement, the optical-head 3 reads the address data in the fast forward mode and the reproduced address data Q is supplied to the deciphering circuit 7. The control signal C2 is varied in response to the output of the deciphering circuit 7 representing the address read by the optical head 3 and the driving device 12 is controlled in response to such variations in the control signal C2 so as to search for the beginning end portion of the area where the second program information partition is recorded. That is, position control of the optical head 3 is conducted by utilizing the address data recorded on the disc 1 together with the program information.
After that, the optical head 3 commences reading the second program information partition having the address 2 in the normal reproducing mode and reproduction of the second program information partition having the address 2 is started. Simultaneously, the system controller 8 again supplies the starting signal Ts to the timer 13 to make the timer start operating and the optical head 3 continues to read the second program information partition having the address 2 until the contents of the timer reach the predetermined short time and the timer produces the overflow signal To.When the overflow signal
To is obtained from the timer 13 and supplied to the system controller 8, the system controller 8 generates a control signal C3 for moving the optical head 3 to the beginning end portion of the area where the third program information partition having a third address (address 3e is recorded sequentially to the second program information partition and the optical head is moved to the beginning end portion of the area where the third program information partition having the address 3 is recorded in the same manner as in the case of movement to the beginning end portion of the area where the second program information partition is recorded. After this movement, the optical head 3 commences reading the third program information partition having the address 3 and the timer 13 starts operating.
Thereafter, the system controller 8 generates respective control signal - up to a control signal Cn for moving the optical head 3 to the beginning end portion of the area where the final program information partition having the final address (address n) is recorded - every time the contents of the timer 13 reach the predetermined short time and the overflow signal To is produced, and therefore the operation described above is repeated until the initial portion of the final program information partition having the address n is reproduced.
Thus, as described above, the initial portion of each of the program information partitions recorded on the disc 1 is reproduced for the predetermined short time sequentially in order of the addresses of the program information partitions, so that catalogue reproduction. is achieved.
Although, in the. embodiment of Figure -1, the .
reproducing time for which the initial portion of each of the program information partitions is reproduced is-determined by the predetermined - time~ set on the timer 13, if the address data åccompanying each of the program Information partitions contains time information.representing the reproducing time from the beginn-ing thereof, the reproducing time for which the initial portion of each of the program information partitions is reproduced can be determined by utilizing such time information without using the timer 13.
Figure 3 shows part of another disc player embodying the present invention, wherein the reproducing time for which the initial portion of each of the program information partitions is reproduced is determined by utilizing the time information as mentioned above. The player of
Figure 3 is in many respects similar to that of
Figure 1 and will only be described is so far as it differs therefrom. In this embodiment, the reproduced address data Q containing the time information as mentioned above is obtained from the decoder 6 when each of the program information partitions is reproduced in the normal reproducing mode and this reproduced address data Q is supplied to both the deciphering circuit and a time information deciphering circuit 14.The time information deciphering circuit 14 deciphers the time information contained in the reproduced address data 0 to generate an output signal P' corresponding to the reproducing time from the beginning of each of the program information partitions, the output signal being supplied to a comparator 1 5.
A time setting device 1 6 is provided for producing a set time signal Ti corresponding to a predetermined short time set thereon, for example ten seconds, the set time signal Ti being supplied to the comparator 15. The comparator 15 compares the output signal P' of the time information deciphering circuit 14 with the set time signal Ti from the time setting device 16 and produces an output signal To' when the output signal P' coincides with the set time signal Ti. The output signal To' corresponds to the overflow signal To in the embodiment of Figure 1 and is supplied to the system controller 8. The system controller 8 generates the control signals C2 to Cn for moving the optical head 3 upon every occasion that the output signal To' of the comparator 15 is supplied thereto.As a result of this, the
reproducing time in which the initial portion of each of the program information partitions is reproduced in the catalogue reproduction mode is determined by the predetermined short time set on. the time setting device 1 6.
As explained above, the illustrated disc players provide for the initial portion of each of the program information partitions recorded on a disc to be reproduced for a predetermined short time in sequence and it is therefore possible to review the whole program information recorded on the disc in a relatively short time. This is very convenient. For example, if the program information recorded on the disc is a plurality of items of music, it is possible to have a preliminary reproduction to provide a summary of all-of them at first and then ~to enjoy the reproduction of a particular one of them selected at will.
Further, it is possible to use the abovedescribed disc players for assorting discs in accordance with the contents recorded thereon,
The present invention can be applied not only to optical disc players used in optical digital audio disc systems, such as in the embodiments disclosed above, but also to other disc players having pick-up devices of various types and used in digital audio disc systems other than the optical digital audio disc system or various video disc systems.
Claims (2)
1. A disc player for reproducing an information signal from a disc on which a plurality of program information partitions are recorded together with address information in a predetermined address order sequence, the player comprising:
pick-up means for reading the program information partitions and address information recorded on the disc;
driving means for moving the pick-up means with respect to the surface of the disc;
deciphering means for deciphering reproduced address data contained in a reproduced signal obtained from the pick-up means; and
system control means for controlling the driving means in response to an output of the deciphering means so as to position the pick-up means at the beginning of each of the program information partitions on the disc in sequence in accordance with the predetermined address order and to cause the pick-up means to read an initial portion of each of the program information partitions for a predetermined short time immediately after the pick-up means is positioned at the beginning of each of the program information partitions.
2. A disc player substantially as herein described with reference to Figures 1 and 2 or
Figure 3 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14176081U JPS5848073U (en) | 1981-09-24 | 1981-09-24 | disc playback device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2107106A true GB2107106A (en) | 1983-04-20 |
| GB2107106B GB2107106B (en) | 1984-12-05 |
Family
ID=15299546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08227119A Expired GB2107106B (en) | 1981-09-24 | 1982-09-23 | Disc players |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5848073U (en) |
| CA (1) | CA1212761A (en) |
| DE (1) | DE3235511C2 (en) |
| FR (1) | FR2513420B1 (en) |
| GB (1) | GB2107106B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140963A (en) * | 1983-05-31 | 1984-12-05 | Rca Corp | Video disc playback system |
| WO1985000509A1 (en) * | 1983-07-19 | 1985-02-14 | Westra Electronic Gmbh | Signal generation system |
| GB2170347A (en) * | 1985-01-26 | 1986-07-30 | Toshiba Kk | Automatic program selector of a video tape recorder |
| GB2195490A (en) * | 1986-08-08 | 1988-04-07 | Dictaphone Corp | Dictation/transcription system |
| EP0419009A1 (en) * | 1989-09-22 | 1991-03-27 | Pioneer Electronic Corporation | Information reproducing apparatus |
| BE1003591A3 (en) * | 1991-03-20 | 1992-04-28 | Staar Sa | Process for automatic storage of records references doors by a support. |
| EP0497387A2 (en) * | 1985-07-03 | 1992-08-05 | Pioneer Electronic Corporation | Carriage servo unit in a disc player |
| EP0500391A2 (en) * | 1991-02-21 | 1992-08-26 | Pioneer Electronic Corporation | Apparatus for reproducing information with different scanning modes |
| WO1993001596A1 (en) * | 1991-07-02 | 1993-01-21 | Deutsche Thomson-Brandt Gmbh | Process for shortening the access time (track control circuit) |
| US5450391A (en) * | 1994-01-18 | 1995-09-12 | Sony Electronics Inc. | Cartridge engagement system for optical disk cartridges |
| US5559776A (en) * | 1992-10-26 | 1996-09-24 | Sony Corporation | Disk playback apparatus |
| US5805561A (en) * | 1994-01-18 | 1998-09-08 | Sony Corporation | Cartridge engagement system for optical disk cartridges having a positionable carriage |
| US6034927A (en) * | 1994-10-20 | 2000-03-07 | Sony Corporation | Carriage for optical disk storage and retrieval array |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5936069U (en) * | 1982-08-30 | 1984-03-06 | 三菱電機株式会社 | PCM disk playback device |
| JPH02152084A (en) * | 1988-12-05 | 1990-06-12 | Pioneer Electron Corp | Recorded information reproducing system |
| US6094321A (en) * | 1996-11-13 | 2000-07-25 | Sony Electronics Inc. | Recording medium assembly transport system with perpendicular engagement piece |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641030B2 (en) * | 1974-01-28 | 1981-09-25 | ||
| US4093832A (en) * | 1976-04-30 | 1978-06-06 | Marvin Glass & Associates | Programmable record changer |
| JPS52141605A (en) * | 1976-05-20 | 1977-11-26 | Victor Co Of Japan Ltd | Record disk reproduction device |
| JPS5611673A (en) * | 1979-07-03 | 1981-02-05 | Pioneer Video Corp | Address information retrieval method in information recording medium reproducing unit |
| DE3064328D1 (en) * | 1979-12-06 | 1983-08-25 | Licentia Gmbh | Playback apparatus for a disc-shaped record carrier, especially a video or audio disc |
| JPS5730870U (en) * | 1980-07-29 | 1982-02-18 |
-
1981
- 1981-09-24 JP JP14176081U patent/JPS5848073U/en active Granted
-
1982
- 1982-09-20 CA CA000411752A patent/CA1212761A/en not_active Expired
- 1982-09-23 GB GB08227119A patent/GB2107106B/en not_active Expired
- 1982-09-24 FR FR8216141A patent/FR2513420B1/en not_active Expired
- 1982-09-24 DE DE19823235511 patent/DE3235511C2/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2140963A (en) * | 1983-05-31 | 1984-12-05 | Rca Corp | Video disc playback system |
| WO1985000509A1 (en) * | 1983-07-19 | 1985-02-14 | Westra Electronic Gmbh | Signal generation system |
| GB2170347A (en) * | 1985-01-26 | 1986-07-30 | Toshiba Kk | Automatic program selector of a video tape recorder |
| US4649442A (en) * | 1985-01-26 | 1987-03-10 | Kabushiki Kaisha Toshiba | Automatic program selector of a video tape recorder |
| GB2170347B (en) * | 1985-01-26 | 1989-06-07 | Toshiba Kk | Automatic program selector of a video tape recorder |
| EP0497387A3 (en) * | 1985-07-03 | 1992-12-23 | Pioneer Electronic Corporation | Record information reproducing method with content identifiers |
| EP0945863A3 (en) * | 1985-07-03 | 1999-11-24 | Pioneer Electronic Corporation | Record information reproducing method with content identifiers |
| EP0497387A2 (en) * | 1985-07-03 | 1992-08-05 | Pioneer Electronic Corporation | Carriage servo unit in a disc player |
| EP0945863A2 (en) * | 1985-07-03 | 1999-09-29 | Pioneer Electronic Corporation | Record information reproducing method with content identifiers |
| GB2195490A (en) * | 1986-08-08 | 1988-04-07 | Dictaphone Corp | Dictation/transcription system |
| GB2195490B (en) * | 1986-08-08 | 1991-02-13 | Dictaphone Corp | Dictaphone/transcription system |
| EP0419009A1 (en) * | 1989-09-22 | 1991-03-27 | Pioneer Electronic Corporation | Information reproducing apparatus |
| EP0500391A2 (en) * | 1991-02-21 | 1992-08-26 | Pioneer Electronic Corporation | Apparatus for reproducing information with different scanning modes |
| EP0500391A3 (en) * | 1991-02-21 | 1992-12-23 | Pioneer Electronic Corporation | Apparatus for reproducing information with different scanning modes |
| US5228014A (en) * | 1991-03-20 | 1993-07-13 | Staar S.A. | Process and apparatus for automatically memorizing references of recordings carried on a recording medium |
| BE1003591A3 (en) * | 1991-03-20 | 1992-04-28 | Staar Sa | Process for automatic storage of records references doors by a support. |
| WO1993001596A1 (en) * | 1991-07-02 | 1993-01-21 | Deutsche Thomson-Brandt Gmbh | Process for shortening the access time (track control circuit) |
| US5559776A (en) * | 1992-10-26 | 1996-09-24 | Sony Corporation | Disk playback apparatus |
| US5450391A (en) * | 1994-01-18 | 1995-09-12 | Sony Electronics Inc. | Cartridge engagement system for optical disk cartridges |
| US5805561A (en) * | 1994-01-18 | 1998-09-08 | Sony Corporation | Cartridge engagement system for optical disk cartridges having a positionable carriage |
| US6034927A (en) * | 1994-10-20 | 2000-03-07 | Sony Corporation | Carriage for optical disk storage and retrieval array |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2513420A1 (en) | 1983-03-25 |
| CA1212761A (en) | 1986-10-14 |
| JPS5848073U (en) | 1983-03-31 |
| DE3235511A1 (en) | 1983-04-07 |
| GB2107106B (en) | 1984-12-05 |
| JPS647511Y2 (en) | 1989-02-28 |
| DE3235511C2 (en) | 1993-10-07 |
| FR2513420B1 (en) | 1988-07-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 20020922 |