Patent US3904150A successfully refreshed from Google Patents.
US3904150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette tape recorder
Assignee: Societe de Fabrication dInstruments de Mesure SFIM SA
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Filing: 1973-03-16
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Granted: 1975-09-09
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Expires: 1993-03-16
Abstract
Abstract A magnetic tape recorder cassette has a captive cover permanently connected to the cassette so that it can be moved from a closed position, covering a front edge which has an opening in it to an open position, in which it covers the rear edge but allows the cassette to be inserted in the recorder. For each spool the cassette has a brake unit arranged to be retracted, when the cassette is inserted in the recorder. The recorder is reversible and drives a tape tensioning device comprising a freewheel and a slipping clutch for each spool, arranged to tend to wind up tape irrespective of the direction of travel of the tape, slipping of one or each clutch allowing the tape to travel while maintaining it taut.
Inventors
- 👤 Pierre Pinot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:28
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/50; G11B15/43; G11B23/00; G11B23/02; G11B23/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A magnetic tape cassette comprising: a. a relatively flat case having two parallel spaced walls, front and rear edges between said walls, and an opening in one of said edges, b. a cover adapted to fit over a portion of saId walls adjacent to said opening so as to close said opening, and c. means interconnecting said cover and case permitting said cover to be removed from said opening to expose the latter without detaching said cover from said case, said means including a groove in one of said cover and case and a peg in the other of said cover and case, said peg being captive in and slidable along said groove.
Claim 2
Dependent Claim
113 words
A magnetic tape cassette comprising: a. a relatively flat case having two parallel spaced walls, front and rear edges between said walls, and an opening in one of said edges, b. a cover adapted to fit over a portion of saId walls adjacent to said opening so as to close said opening, and c. means interconnecting said cover and case permitting said cover to be removed from said opening to expose the latter without detaching said cover from said case, said means including a groove in one of said cover and case and a peg in the other of said cover and case, said peg being captive in and slidable along said groove.
Claim 3
Dependent Claim
50 words
A magnetic tape cassette as defined in claim 1 wherein said walls are generally rectangular, said opening is in the front edge of said case, and said cover is adapted to fit over portion port of said walls adjacent the rear edge of said case when said opening is uncovered.
Claim 4
Dependent Claim
55 words
A magnetic tape cassette as defined in claim 1 including a groove in the outer surface of each of said walls, said grooves extending along a portion of the peripheries of their respective walls, and said cover carrying two pegs facing each other, said pegs being slidably arranged and held captive within said grooves, respectively.
Claim 5
Dependent Claim
28 words
A magnetic tape cassette as defined in claim 3 wherein said case is generally rectangular, and each of said grooves extends along two adjacent edges of said case.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |