Patent USRE22819E successfully refreshed from Google Patents.
Patent US4755978A successfully refreshed from Google Patents.
US4755978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc player
Assignee: Sony Corp
•
Filing: 1987-02-10
•
Granted: 1988-07-05
•
Expires: 2007-02-10
Abstract
Abstract A disc player has a slide table mounted to slide horizontally into and out of a casing, a disc tray supported rotatably on the slide table and having a plurality of recessed disc storage areas arranged about its center of rotation to store a plurality of discs on its top surface a drive mechanism for rotating the disc tray and halting it at predetermined positions, an optical pickup and a turntable disposed within the casing at a play position for reproducing the disc placed at the play position by the disc tray, and a loading mechanism for displacing the slide table and controlling rotation of the disc tray so that, when the slide table is displaced from a first position outside of the casing to a second position within the casing, the foremost disc storage area of the disc tray in the first position is rotated to the play position in the second position. Further, the optical pickup and the turntable are moved upward by the loading mechanism with respect to the disc tray when the slide table is moved to the second position so that the disc set at the play position is held between the turntable and a disc presser while being kept afloat from the disc tray.
Inventors
- 👤 Kazuyuki Takizawa
- 👤 Hiroyuki Urushibata
- 👤 Yoshiaki Kumagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:39
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/08; G11B17/22; G11B17/226; G11B25/00; G11B25/04; G11B25/043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
A disc player comprising: a casing having an opening at the front thereof; a slide table mounted to slide horizontally into and out of said casing through said opening between a first position extending outside of said casing and a second position within said casing; a disc tray supported rotatably on said slide table for turning about an axis at the center of said disc tray and having a plurality of disc storage areas arranged about said center of the disc tray to store a plurality of discs on said disc tray; drive means for rotating said disc tray and halting it at predetermined positions; an optical pickup and a turntable disposed within said casing at a play position for reproducing a disc placed at said play position by said disc tray; and loading means operative in a first mode for displacing said slide table from said first position extending outside of the casing to said second position within the casing, and for controlling turning of said disc tray so that the foremost of said disc storage areas of said disc tray when said slide table is in said first position is rotated to said play position when said slide table is in said second position.
Claim 2
Dependent Claim
206 words
A disc player comprising: a casing having an opening at the front thereof; a slide table mounted to slide horizontally into and out of said casing through said opening between a first position extending outside of said casing and a second position within said casing; a disc tray supported rotatably on said slide table for turning about an axis at the center of said disc tray and having a plurality of disc storage areas arranged about said center of the disc tray to store a plurality of discs on said disc tray; drive means for rotating said disc tray and halting it at predetermined positions; an optical pickup and a turntable disposed within said casing at a play position for reproducing a disc placed at said play position by said disc tray; and loading means operative in a first mode for displacing said slide table from said first position extending outside of the casing to said second position within the casing, and for controlling turning of said disc tray so that the foremost of said disc storage areas of said disc tray when said slide table is in said first position is rotated to said play position when said slide table is in said second position.
Claim 3
Dependent Claim
83 words
The disc player as in claim 1;, wherein said loading means includes means for moving said optical pickup and said turntable upwardly with respect to said disc tray when said slide table is at said second position so that said turntable lifts a disc from said disc storage area at said play position; and further comprising disc presser means located so that the lifted disc is held between said turntable and said disc presser means while being kept afloat from said disc tray.
Claim 4
Dependent Claim
82 words
The disc player as in claim 1; wherein said loading means is operative in a second mode for displacing said slide table from said second position in said casing to said first position extending outside of said casing, and the disc storage area of said disc tray which is at said play position when said slide table is in said second position is rotated to the foremost position of said disc tray when said slide table is displaced to said first position.
Claim 5
Dependent Claim
90 words
The disc player as in claim 1; further comprising means for selecting a continuous play mode of the disc player in which, with said slide table in said second position, said drive means for the disc tray is made operative, upon the completion of the reproducing of a disc at said play position, to turn said disc tray through an angle equivalent to the angular spacing between adjacent ones of said disc storage areas so as to bring another disc to said play position for reproduction by said optical pickup.
Claim 6
Dependent Claim
63 words
The disc player as in claim 4; further comprising means for detecting the absence of a disc from any one of said disc storage areas so that, upon the turning of said disc tray with said slide table in said second position, each of said disc storage areas from which a disc is detected to be absent is moved past said play position.
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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |