US3576366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support system for trays in slide projectors
Assignee: FOTEK CORP Pty Ltd
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Filing: 1969-09-25
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Granted: 1971-04-27
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Expires: 1989-09-25
Abstract
Abstract A slide projector having a housing with a longitudinally extending, U-shaped slide tray receiving channel and a support system designed to accept with equal facility either an elongated box slide tray or a circular slide tray. One wall of the slide tray receiving channel has a recess formed therein and bearing pads are disposed in the recess for contacting and rotatably supporting the hub portion of a circular slide tray. Stabilization pins are provided in the second wall and are adapted to contact the hub on the opposite side for maintaining the circular slide tray in position in the channel.
Inventors
- 👤 John L Sheaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:48
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
199 words
A slide projector in combination with a circular slide tray, said circular slide tray including a first hub on one face thereof extending outwardly of the body of said circular slide tray having an axially extending flange on said one face thereof and a second hub on the opposite face; said slide projector including a housing having an elongated tray receiving cavity, said cavity comprising said first and second sidewalls and a base, said first sidewall having a top surface and an inside surface, a support system for supporting either an elongated, box slide tray or said circular slide tray, said support system comprising a recess formed in said first sidewall and extending downwardly from said top surface thereof and inwardly from said inside surface, means disposed in said recess rotatably supporting said circular slide tray at said axially extending flange, stabilizing support means disposed adjacent said second sidewall and contacting the second hub of said circular tray for maintaining the tray in a substantially upright position with respect to the cavity base, the sidewalls of said cavity and said support means being relatively disposed so that either type of slide tray may be removed vertically from said cavity.
Claim 2
Dependent Claim
199 words
A slide projector in combination with a circular slide tray, said circular slide tray including a first hub on one face thereof extending outwardly of the body of said circular slide tray having an axially extending flange on said one face thereof and a second hub on the opposite face; said slide projector including a housing having an elongated tray receiving cavity, said cavity comprising said first and second sidewalls and a base, said first sidewall having a top surface and an inside surface, a support system for supporting either an elongated, box slide tray or said circular slide tray, said support system comprising a recess formed in said first sidewall and extending downwardly from said top surface thereof and inwardly from said inside surface, means disposed in said recess rotatably supporting said circular slide tray at said axially extending flange, stabilizing support means disposed adjacent said second sidewall and contacting the second hub of said circular tray for maintaining the tray in a substantially upright position with respect to the cavity base, the sidewalls of said cavity and said support means being relatively disposed so that either type of slide tray may be removed vertically from said cavity.
Claim 3
Dependent Claim
11 words
The invention according to claim 1 wherein the recess is arcuate.
Claim 4
Dependent Claim
35 words
The invention according to claim 1 wherein the means disposed in said recess of said first sidewall comprises two spaced bearing pads which contact and support said circular slide tray at said axially extending flange.
Claim 5
Dependent Claim
56 words
The invention according to claim 1 wherein said base member includes a longitudinally extending horizontal base member and two vertically spaced, longitudinal flanges attached thereto and disposed above said base member whereby the box slide tray contacts only the longitudinal flanges of said base member when it is in position in the slide tray receiving cavity.
Claim 6
Dependent Claim
34 words
The invention according to claim 1 wherein the stabilizing support means includes two pins which extend toward said first sidewall and contact said second hub, said pins being vertically disposed above the bearing pads.
References Cited (Backward Citations)
US3209647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |