Patent US3830566A successfully refreshed from Google Patents.
US3830566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small slide tray
Assignee: Tyco Industries II Inc
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Filing: 1972-08-25
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Granted: 1974-08-20
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Expires: 1992-08-25
Abstract
Abstract A miniaturized slide tray with discontinuous septa for permitting a slide projector pusher to pass in a transverse manner into the tray for sequential slide advancement is provided. The tray rack is constructed of a compliant material to minimize mechanical ''''Q'''' and jumping when such tray is advanced by the projector index gear.
Inventors
- 👤 F Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:02
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
278 words
A miniaturized slide tray having increased slide capacity per unit length for use in a slide projector of the type having a slide pusher to transport slides between the tray and a projection gate and a rotatable indexing gear to advance the tray, said tray comprising a rectangular-shaped box having a first open side for receiving a plurality of slides, a second partially open side to permit passage of the slide pusher, a top wall having a series of downwardly extending parallel septa and a corresponding series of finger springs, and a bottom wall having a series of upwardly extending parallel septa, in alignment with the downwardly extending septa to define together with the downwardly extending septa and the finger springs a plurality of slide receiving spaces, said septa extending only partially from their respective walls to permit passage of the slide pusher therebetween and being sized and spaced such that the width of each slide receiving space corresponds to the thickness of each slide, and the width of two septa plus a slide receiving space is greater than the thickness of the slide pusher to permit the pusher to engage one slide and pass between the next adjacent slides; and an elongated rack means formed of compliant material and fixedly attached to one edge of the bottom wall, said rack having a series of teeth for engagement with the indexing gear, which teeth have a pitch corresponding to the distance between the centers of adjacent slide receiving spaces but less than the pitch of the indexing gear to provide for the incremental onespace advance of the slide tray for each incremental one-tooth rotation of said indexing gear.
Claim 2
Dependent Claim
278 words
A miniaturized slide tray having increased slide capacity per unit length for use in a slide projector of the type having a slide pusher to transport slides between the tray and a projection gate and a rotatable indexing gear to advance the tray, said tray comprising a rectangular-shaped box having a first open side for receiving a plurality of slides, a second partially open side to permit passage of the slide pusher, a top wall having a series of downwardly extending parallel septa and a corresponding series of finger springs, and a bottom wall having a series of upwardly extending parallel septa, in alignment with the downwardly extending septa to define together with the downwardly extending septa and the finger springs a plurality of slide receiving spaces, said septa extending only partially from their respective walls to permit passage of the slide pusher therebetween and being sized and spaced such that the width of each slide receiving space corresponds to the thickness of each slide, and the width of two septa plus a slide receiving space is greater than the thickness of the slide pusher to permit the pusher to engage one slide and pass between the next adjacent slides; and an elongated rack means formed of compliant material and fixedly attached to one edge of the bottom wall, said rack having a series of teeth for engagement with the indexing gear, which teeth have a pitch corresponding to the distance between the centers of adjacent slide receiving spaces but less than the pitch of the indexing gear to provide for the incremental onespace advance of the slide tray for each incremental one-tooth rotation of said indexing gear.
Claim 3
Dependent Claim
18 words
A miniaturized slide tray as claimed in claim 1, wherein said rack means is not a true involute.
Claim 4
Dependent Claim
29 words
A miniaturized slide tray as claimed in claim 1, wherein said rack means has a pitch of 0.175 inches, and said indexing gear has a pitch of 0.224 inches.
Claim 5
Dependent Claim
17 words
A miniaturized slide tray as claimed in claim 1, wherein said rack means is made of polyvinylchloride.
Claim 6
Dependent Claim
17 words
A miniaturized slide tray as claimed in claim 1, wherein said rack means is made of rubber.
Claim 7
Dependent Claim
27 words
A miniaturized slide tray as claimed in claim 1, wherein said rack means is made of a compliant material having a Shore Hardness of 45 to 55.
Claim 8
Dependent Claim
36 words
A miniaturized slide tray as claimed in claim 1, wherein said rack means is attached to said slide tray by urging said rack means onto a series of downwardly pointing extensions of said lower septa portions.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |