US4875109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Record/not record latch for recording cassette
Assignee: 3M Co
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Filing: 1988-05-09
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Granted: 1989-10-17
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Expires: 2008-05-09
Abstract
Abstract A recording cassette has a latch that pivots between two positions. A plug at one extremity of the latch either blocks or unblocks a record/not record opening at an under wall of the cassette while a relatively large flange at the other extremity of the latch can either be seen or unseen at the label wall to indicate the record/not record status. By making the latch of a color that contrasts with the label wall, mistakes in observing the record/not record status are virtually precluded.
Inventors
- 👤 Robert L. Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:09
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/04; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08714; G11B23/0875
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
A recording cassette formed to provide a record/nor record opening extending through both an under wall of the cassette and a top wall which is visible when the cassette is in place on a recorder, a latch which is pivotable between two positions wherein a plug at one extremity of the latch either blocks or unblocks the record/not record opening at said under wall of the cassette while the other extremity of the latch can either be seen or unseen at the opening in said visible wall of the cassette, depending upon the position to which the latch has been pivoted.
Claim 2
Dependent Claim
101 words
A recording cassette formed to provide a record/nor record opening extending through both an under wall of the cassette and a top wall which is visible when the cassette is in place on a recorder, a latch which is pivotable between two positions wherein a plug at one extremity of the latch either blocks or unblocks the record/not record opening at said under wall of the cassette while the other extremity of the latch can either be seen or unseen at the opening in said visible wall of the cassette, depending upon the position to which the latch has been pivoted.
Claim 3
Dependent Claim
51 words
A recording cassette as defined in claim 1 wherein the latch at said other extremity has a broad flange extending substantially parallel to said visible wall of the cassette, which flange when seen indicates "not record" and pivots beneath said visible wall of the cassette to be unseen to indicate "record."
Claim 4
Dependent Claim
51 words
A recording cassette as defined in claim 1 wherein said visible wall of the cassette has a web that partially close the record/not record opening, and said other extremity of the latch has a flange that either covers or uncovers the web when the latch is pivoted between its two positions.
Claim 5
Dependent Claim
50 words
A recording cassette as defined in claim 3 wherein the underside of the web is formed with a groove, and the latch has a leaf spring with an upturned finger that fits into the groove when said flange covers the web, thus releasably locking the latch in that position .
Claim 6
Dependent Claim
33 words
A recording cassette as defined in claim 4 wherein the exposed face of said flange is formed with a discontinuity by which the latch can be pivoted from one position to the other.
Claim 7
Dependent Claim
26 words
A recording cassette as defined in claim 5 wherein said discontinuity comprises a cavity into which a sharp point can be inserted to pivot the latch.
Claim 8
Dependent Claim
19 words
A recording cassette as defined in claim 5 wherein said discontinuity comprises striations into which a fingernail can fit.
Claim 9
Dependent Claim
35 words
A recording cassette as defined in claim 1 wherein the latch is a single piece of plastic of a color contrasting to the color of the surrounding area of said visible wall of the cassette.
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) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |