US3858970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous show slide projector
Assignee: Bell and Howell Co
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Filing: 1973-12-21
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Granted: 1975-01-07
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Expires: 1993-12-21
Abstract
Abstract A slide projector having a supply station and a previewing station including means for receiving a supply of slides may be operated to present a continuous slide show.
Inventors
- 👤 Iii John Daniel Collier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:43
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/14; G03B23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
Improvements in a slide projector including a housing and a slide transport means for accepting slides and transporting same to a projection station in said housing, the housing having a supply station at which slides may be introduced into and removed from said transport means, the transport means being arranged to transport a slide from said supply station to said previewing station, and to transport a slide from said previewing station to said projection station and out of said projection station toward said supply station, the improvement comprising: magazine coupling means at said supply station for receiving a magazine adapted to contain a first plurality of slides to be fed by said transport means to said previewing station and said projection station; and magazine coupling means at said previewing station for receiving a magazine adapted to contain a second plurality of slides to be fed by said transport means to said projection station other than when slides are transported from said supply station to enable transporting continuously to said projection station slides alternatively introduced serially at said supply station and at said previewing station.
Claim 2
Dependent Claim
184 words
Improvements in a slide projector including a housing and a slide transport means for accepting slides and transporting same to a projection station in said housing, the housing having a supply station at which slides may be introduced into and removed from said transport means, the transport means being arranged to transport a slide from said supply station to said previewing station, and to transport a slide from said previewing station to said projection station and out of said projection station toward said supply station, the improvement comprising: magazine coupling means at said supply station for receiving a magazine adapted to contain a first plurality of slides to be fed by said transport means to said previewing station and said projection station; and magazine coupling means at said previewing station for receiving a magazine adapted to contain a second plurality of slides to be fed by said transport means to said projection station other than when slides are transported from said supply station to enable transporting continuously to said projection station slides alternatively introduced serially at said supply station and at said previewing station.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |