US4661940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disc player
Assignee: US Philips Corp
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Filing: 1984-09-13
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Granted: 1987-04-28
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Expires: 2004-09-13
Abstract
Abstract An optical disc player has a carriage (10) which can be moved to project outside the housing (1) and carries a drive motor (2) having a spindle (4) with means (6) for supporting a disc (40). The player also includes an optical reading device (7) having an optical read head (8) which is movable over the surface of the disc. The reading device (8) is secured in the housing (1) and the housing comprises aligning means (11) which align the spatial position of the rotational axis (3) of the drive motor (2) accurately relative to the optical reading device (7).
Inventors
- 👤 Eduard Camerik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/022; G11B17/028; G11B17/035; G11B19/00; G11B19/20; G11B19/2009; G11B7/00; G11B7/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
An optical disc player for discs carrying opticaly encoded information and comprising: a housing (1), a drive motor (2) having a casing and a rotatable spindle (4) with a free end (5), a disc-supporting means on the spindle for supporting a record disc (6) thereon in a plane perpendicular to the axis of rotation (3), of the spindle, an optical reading device (7) having an optical read head (8) which is movable over the surface of the disc (6) on the spindle and reads the information on the disc by means of a light beam (9), and a carriage (10) for the drive motor (2), which carriage is movable between a first position inside the housing (1), in which position the disc on the spindle can be read by means of the optical read head, and a second position in which the carriage projects from the housing and a disc can be placed on the spindle and removed from the spindle, characterized, in that the optical reading device (7) is secured in the housing, and aligning means (11) are fixed in the housing, which means, when the carriage (10) is in the first position, cooperate with the drive motor (2) to align the spatial position of the axis of rotation (3) of the spindle accurately relative to the optical reading device.
Claim 2
Dependent Claim
221 words
An optical disc player for discs carrying opticaly encoded information and comprising: a housing (1), a drive motor (2) having a casing and a rotatable spindle (4) with a free end (5), a disc-supporting means on the spindle for supporting a record disc (6) thereon in a plane perpendicular to the axis of rotation (3), of the spindle, an optical reading device (7) having an optical read head (8) which is movable over the surface of the disc (6) on the spindle and reads the information on the disc by means of a light beam (9), and a carriage (10) for the drive motor (2), which carriage is movable between a first position inside the housing (1), in which position the disc on the spindle can be read by means of the optical read head, and a second position in which the carriage projects from the housing and a disc can be placed on the spindle and removed from the spindle, characterized, in that the optical reading device (7) is secured in the housing, and aligning means (11) are fixed in the housing, which means, when the carriage (10) is in the first position, cooperate with the drive motor (2) to align the spatial position of the axis of rotation (3) of the spindle accurately relative to the optical reading device.
Claim 3
Dependent Claim
75 words
An optical disc player as claimed in claim 1, characterized in that the aligning means (11) comprise alignment stops (12) which are secured in fixed positions in the housing and cooperate with the casing of the drive motor (2) when the carriage (10) is in the first position, and spring means (13) are arranged to hold the drive motor (2) resiliently against the alignment stops (12) when the carriage (10) is in the first position.
Claim 4
Dependent Claim
176 words
An optical disc player as claimed in claim 2, characterized in that the carriage (10) is supported by bearings with some play with respect to the housing (1), the drive motor (27) is secured to the carriage (10), the carriage (10) carries a slide member (22) which is bearing supported so as to be capable of limited movement relative to the carriage in the direction of movement thereof, spring means (13) are provided on the carriage (10) to load the slide member (22) resiliently in a direction towards the second position, and latching means (31) are provided in the housing, which latching means, in the first position, latch the slide member (22) in the housing against the resilient loading of the spring means (13), so that when the carriage (10) moves from the second to the first position, first the drive motor (2) comes into contact with the alignment stops (12) and thereafter the slide member (22) can be pushed further against the load of the spring means (13) until the latching means (31) become operative.
Claim 5
Dependent Claim
44 words
An optical disc player as claimed in claim 1, characterized in that the optical reading device (7) Is located in the housing (1) in a position facing the free end (5) of the spindle (4) when the carriage (10) is in the first 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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |