US4288048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette
Assignee: US Philips Corp
•
Filing: 1980-02-14
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Granted: 1981-09-08
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Expires: 2000-02-14
Abstract
Abstract A magnetic tape cassette having two tape winding reels with associated brake levers pivotable between a disengaged position and a braking position for rotating the reels slightly and tensioning the tape when the cassette is not on a tape apparatus. To obtain a maximum rotation of the winding reels within the available cassette space, the levers are each journalled on a lever mount which can be actuated from outside the cassette to move from a rest position to an operating position in which the brake levers are disengaged, in the rest position the levers engaging at least one control surface in the cassette.
Inventors
- 👤 Joannus H. F. C. Sieben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:58
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/22; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08721
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
211 words
A cassette for a record carrier in the form of a tape, comprising two rotatable winding reels for taking up and unwinding the record carrier; a brake lever for each of the winding reels, movable between a disengaged position, in which the brake lever is disengaged from the associated winding reel, and a braking position, in which the brake lever cooperates with the associated winding reel so as to brake said reel, the brake lever rotating the associated winding reel in a winding direction through a limited angle; and resilient means for moving each brake lever from its disengaged position to its braking position, comprising in addition a lever mount for the two brake levers, means for mounting the lever mount for movement between a rest position and an operating position, and means for moving the mount actuable from outside the cassette, the two brake levers being each journalled on said mount so as to be pivotable between their braking positions and their disengaged positions, and at least one control surface in the cassette for the brake levers, arranged such that during the movement of the lever mount from its rest position to its operating position, said surface cooperates with said brake levers to pivot said levers to their disengaged positions.
Claim 2
Dependent Claim
211 words
A cassette for a record carrier in the form of a tape, comprising two rotatable winding reels for taking up and unwinding the record carrier; a brake lever for each of the winding reels, movable between a disengaged position, in which the brake lever is disengaged from the associated winding reel, and a braking position, in which the brake lever cooperates with the associated winding reel so as to brake said reel, the brake lever rotating the associated winding reel in a winding direction through a limited angle; and resilient means for moving each brake lever from its disengaged position to its braking position, comprising in addition a lever mount for the two brake levers, means for mounting the lever mount for movement between a rest position and an operating position, and means for moving the mount actuable from outside the cassette, the two brake levers being each journalled on said mount so as to be pivotable between their braking positions and their disengaged positions, and at least one control surface in the cassette for the brake levers, arranged such that during the movement of the lever mount from its rest position to its operating position, said surface cooperates with said brake levers to pivot said levers to their disengaged positions.
Claim 3
Dependent Claim
37 words
A cassette as claimed in claim 1, wherein said control surface includes a stop for each brake lever, which the brake lever engages when the lever mount is moved from its rest position to its operating position.
Claim 4
Dependent Claim
21 words
A cassette as claimed in claim 2, wherein said stop is formed by a portion of a wall of the cassette.
Claim 5
Dependent Claim
28 words
A cassette as claimed in claim 1, 2 or 3, comprising in addition at least one actuating spring arranged to urge the lever mount toward its rest position.
Claim 6
Dependent Claim
35 words
A cassette as claimed in claim 4, wherein said resilient means and said at least one actuating spring are formed by a plurality of arms of a unitary multi-arm leaf spring mounted in the cassette.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |