Patent US3685893A successfully refreshed from Google Patents.
US3685893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette for a sound slide projector
Assignee: Kalart Co Inc
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Filing: 1969-10-08
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Granted: 1972-08-22
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Expires: 1989-10-08
Abstract
Abstract A cassette for a sound slide projector has in a casing a first compartment and a second compartment. The first compartment accommodates a tape holding mechanism and is accessible through recesses for forward winding and rewinding of the tape and for recording a message on the tape or playing back such message from the tape. The second compartment accommodates the slide and has in its bottom wall a slot for removing the slide from the cassette into a projection position and for returning the slide into the compartment upon completion of the projection and playback of the tape in the first compartment.
Inventors
- 👤 William Castedello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:25
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06; Y; Y10; Y10S; Y10S40/00; Y10S40/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
243 words
A cassette for a sound slide projector, said cassette comprising: a casing having a top wall, a bottom wall and two side walls and including an upper first compartment for accommodating therein a magnetic tape holding assembly and a lower second compartment for accommodating therein a slide, a side wall portion of the casing juxtaposed to the first compartment including a first recess for making the tape accessible for coaction with a forward drive capstan or a rewind capstan and a second recess spaced apart from the first recess for making the tape accessible for coaction with a sound head or an erase head, the bottom wall of the casing including an elongate slot for gravity drop of a slide out of the second compartment and insertion of a slide into the second compartment; and externally releasable slide retaining means biased into engagement with a slide in the second compartment for releasably retaining the slide in said compartment, release of said retaining means freeing the slide for gravity drop out of the second compartment through said slot, said retaining means including a recess in a side wall portion of the casing juxtaposed to the second compartment and a spring secured at one end to the casing and biased to protrude into the second compartment through said side wall recess for releasable engagement with a slide in said second compartment, said spring including an outwardly protruding extension for withdrawing the spring from said engagement.
Claim 2
Dependent Claim
243 words
A cassette for a sound slide projector, said cassette comprising: a casing having a top wall, a bottom wall and two side walls and including an upper first compartment for accommodating therein a magnetic tape holding assembly and a lower second compartment for accommodating therein a slide, a side wall portion of the casing juxtaposed to the first compartment including a first recess for making the tape accessible for coaction with a forward drive capstan or a rewind capstan and a second recess spaced apart from the first recess for making the tape accessible for coaction with a sound head or an erase head, the bottom wall of the casing including an elongate slot for gravity drop of a slide out of the second compartment and insertion of a slide into the second compartment; and externally releasable slide retaining means biased into engagement with a slide in the second compartment for releasably retaining the slide in said compartment, release of said retaining means freeing the slide for gravity drop out of the second compartment through said slot, said retaining means including a recess in a side wall portion of the casing juxtaposed to the second compartment and a spring secured at one end to the casing and biased to protrude into the second compartment through said side wall recess for releasable engagement with a slide in said second compartment, said spring including an outwardly protruding extension for withdrawing the spring from said engagement.
Claim 3
Dependent Claim
90 words
The cassette according to claim 1 wherein said compartments are disposed in alignment and the tape holding assembly in the upper compartment comprises a supply spool and a take-up spool rotatably mounted in said compartment in substantially coplanar relationship, one end of the tape being secured to the supply spool and the other end to the take-up spool, and guide means supported by and within said compartment for guiding the tape from one spool to the other along a path within said upper compartment traversing said first and second recess.
Claim 4
Dependent Claim
18 words
The cassette according to claim 2 wherein said spools are directly and peripherally coupled by slip-friction coupling means.
Claim 5
Dependent Claim
58 words
The cassette according to claim 3 wherein said slip-friction coupling means comprise a ring of flexible high friction material secured to the periphery of one of said spools radially protruding therefrom and overlapping the peripheral rim of the other spool in frictional engagement therewith thereby transmitting a limited rotational force from said one spool to said other spool.
Claim 6
Dependent Claim
30 words
The cassette according to claim 2 and comprising a Unidirectional brake means coacting with said spools to apply to the same a limited braking force during rewind of the tape.
Claim 7
Dependent Claim
108 words
The cassette according to claim 5 wherein said unidirectional brake means comprise a toggle spring pivotally supported by the casing within said first compartment, said toggle spring including a first springy arm in continuous sliding engagement with the periphery of the supply spool and a second springy arm slidably engageable with the periphery of the take-up spool, rotation of the supply spool in rewind direction forcing said toggle spring past its dead center, said movement of the toggle spring causing the first arm to engage the supply spool with pressure engagement and the second arm to engage the take-up spool thereby applying the braking force to both spools.
Claim 8
Dependent Claim
52 words
The cassette according to claim 6 wherein said toggle spring is a generally V-shaped spring having a first long arm and a second short arm, the long arm coacting with the supply spool and the short arm with the take-up spool, said spring being supported by the casing pivotal about its apex.
Claim 9
Dependent Claim
69 words
The cassette according to claim 2 and comprising a fastener for releasably fastening the ends of the tape to the spools, each of said fasteners including a clamping spring for wrapping thereabout the respective tape end, each of said spools including a recess for receiving and retaining therein one of the clamping springs for holding the respective tape end between the spring and the respective spool by spring pressure.
Claim 10
Dependent Claim
48 words
The cassette according to claim 8 wherein each of said clamping springs is a V-shaped spring, each tape end being folded about the outside of the respective spring and the arms of the springs with the tape ends thereon being inserted into the recesses with a pressure fit.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |