US4701902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic loading disc player
Assignee: Pioneer Corp
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Filing: 1985-04-26
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Granted: 1987-10-20
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Expires: 2005-04-26
Abstract
Abstract An automatic disc player including a housing, disc carrier means to convey a disc between predetermined playback position and a predetermined withdrawal position ready to be withdrawn out of the housing upon termination of playback operation, signal generating means for producing control signals to be predominant over various steps of the playback operation, and an electric control circuit responsive to the control signals to control the various steps of the playback operation, the signal generating means comprising position detecting means responsive to movement of the disc to the withdrawal position and operative to produce a signal when the disc being moved away from the playback position reaches the withdrawal position, and playback re-start switch means which is operative to produce a signal in response to slight movement of the disc from the withdrawal position toward the playback position, the control signals to be produced by the signal generating means including signals to control the start of playback operation. The position detecting means and the playback re-start switch means are connected in series with between ground and the control circuit, and the signals to control the start of playback operation include the signal from the playback re-start switch means.
Inventors
- 👤 Yoshiro Aoyagi
- 👤 Toshiyuki Kimura
- 👤 Susumu Niinuma
- 👤 Minoru Yoshioka
- 👤 Fumihiko Yokogawa
- 👤 Keiichi Matsumoto
- 👤 Akira Haeno
- 👤 Takashi Sato
- 👤 Yoshiro Nishi
- 👤 Yoshihiko Watanabe
- 👤 Hiroyuki Hirano
- 👤 Youichi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:54
CPC Classifications
G; G11; G11B; G11B19/00; G11B17/00; G11B19/02; G11B19/04; G11B21/00; G11B21/02; G11B27/00; G11B27/10; G11B27/102; G11B27/105; G11B33/00; G11B33/02; G11B33/08; G11B33/10; G11B33/14; G11B7/00; G11B7/002; G11B7/0037; G11B7/08; G11B7/085; G11B7/08547
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
276 words
In an automatic disc player comprising disc playback means, a housing enclosing said disc playback means and having an elongated slot through which a disc is to be inserted into the housing and to be withdrawn from the housing, and a disc carrier means for conveying the disc in response to forward and reverse control signals between a playback position at which the disc is released onto said playback means and a withdrawl position at which the disc is ready to be withdrawn through said slot, said disc carrier means including a disc carrier member movable between said playback position and said withdrawl position, a driver for driving said disc carrier member from said withdrawl position to said playback position in accordance with said forward control signal and from said playback position to said withdrawl position in accordance with said reverse control signal, and a control circuit for supplying said forward control signal when it is triggered and reverse control signal when it detects a play completion of said playback means, the improvement comprising: resilient holding means associated with said disc carrier member for resiliently holding the disc in cooperation with said disc carrier member so as to allow a slight movement of said disc relative to said disc carrier member; a first detector for producing an eject completion signal when said disc carrier member takes said withdrawal position; a second detector for producing a re-start signal when said disc slightly moves relative to said disc carrier member under the presence of said eject completion signal; and an additional control circuit for supplying said forward control signal to said driver in response to said re-start signal.
Claim 2
Dependent Claim
276 words
In an automatic disc player comprising disc playback means, a housing enclosing said disc playback means and having an elongated slot through which a disc is to be inserted into the housing and to be withdrawn from the housing, and a disc carrier means for conveying the disc in response to forward and reverse control signals between a playback position at which the disc is released onto said playback means and a withdrawl position at which the disc is ready to be withdrawn through said slot, said disc carrier means including a disc carrier member movable between said playback position and said withdrawl position, a driver for driving said disc carrier member from said withdrawl position to said playback position in accordance with said forward control signal and from said playback position to said withdrawl position in accordance with said reverse control signal, and a control circuit for supplying said forward control signal when it is triggered and reverse control signal when it detects a play completion of said playback means, the improvement comprising: resilient holding means associated with said disc carrier member for resiliently holding the disc in cooperation with said disc carrier member so as to allow a slight movement of said disc relative to said disc carrier member; a first detector for producing an eject completion signal when said disc carrier member takes said withdrawal position; a second detector for producing a re-start signal when said disc slightly moves relative to said disc carrier member under the presence of said eject completion signal; and an additional control circuit for supplying said forward control signal to said driver in response to said re-start signal.
Claim 3
Dependent Claim
108 words
An automatic disc player as set forth in claim 1, wherein said first detector includes a normally-open switch which is actuated to close its circuit when said disc carrier member takes said withdrawal position, said second detector includes a normally-closed switch which is actuated to open when said disc moves relative to said disc carrier member and is connected in series with said normally-open switch, and voltage supply means for supplying a voltage across the series connection of said normally-open switch and said normally closed-switch, for causing a potential variation as said re-start signal when said noramlly-closed switch becomes open as long as said normally-open switch is closed.
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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |