Patent US3905694A successfully refreshed from Google Patents.
US3905694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide projector and feed arrangement therefor
Assignee: Individual
•
Filing: 1974-03-04
•
Granted: 1975-09-16
•
Expires: 1994-03-04
Abstract
Abstract A slide projector intended to be manufactured from inexpensive components, incorporating tray sections arranged to telescope within the housing of the projector to present a solid side wall surface for transport and storage that are easily released to expose a stacked train of linked slide mounts in one tray section with the other tray section intended to receive as a stack the linked slides after they have been moved by a feed mechanism over a light source. The feed mechanism preferably involves a cage having four sides each side having a tracking lug extending outwardly therefrom that will engage a notch formed in a side of each slide mount of the train of slide mounts. The individual tracking lug engages the notch in an individual slide mount drawing that mount across a light source that passes light through a slide arrangement therein, through a reflective means, that light finally passing into and through a lens that projects the image on the film portion of the slide onto a screen surface. Additional to the slide projector and feed mechanism therefor, the present invention includes the train of slide mounts and linking arrangement therefore, whereby the slide mounts will fold naturally into a stack after passage across the light source.
Inventors
- 👤 Vito Miragliotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:54
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12; G03B23/125
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
A slide projector comprising: a housing; a lens means arranged with said housing for focusing and projecting an image onto a screen surface; a source of electrical energy; a light source arranged within said housing, passing light therefrom, when energized by said source of electrical energy, into said lens means; a cage slide mount feed mechanism having sides and arranged to be manually rotated in said housing, providing an unobstructed light passage therethrough when a side thereof is disposed between said light source and said lens means forming a viewing area, light from said light source passing therethrough and thence into said lens means; a train of slide mounts, each mount arranged to receive a slide therein, connected in end to end relationship so as to fold back and forth over one another into a stack when lowered vertically onto a flat surface; said mounts having their connected edges camfered on opposite faces thereof, and are connected one to another such that a ''''V'''' is formed at each connection with adjacent ''''V''s'''' facing opposite to each other; and tracking lug means extending outwardly from each side of said cage slide mount feed mechanism for engaging sequentially each slide mount thereby moving said slide mount into and over the viewing area when said cage is rotated.
Claim 2
Dependent Claim
215 words
A slide projector comprising: a housing; a lens means arranged with said housing for focusing and projecting an image onto a screen surface; a source of electrical energy; a light source arranged within said housing, passing light therefrom, when energized by said source of electrical energy, into said lens means; a cage slide mount feed mechanism having sides and arranged to be manually rotated in said housing, providing an unobstructed light passage therethrough when a side thereof is disposed between said light source and said lens means forming a viewing area, light from said light source passing therethrough and thence into said lens means; a train of slide mounts, each mount arranged to receive a slide therein, connected in end to end relationship so as to fold back and forth over one another into a stack when lowered vertically onto a flat surface; said mounts having their connected edges camfered on opposite faces thereof, and are connected one to another such that a ''''V'''' is formed at each connection with adjacent ''''V''s'''' facing opposite to each other; and tracking lug means extending outwardly from each side of said cage slide mount feed mechanism for engaging sequentially each slide mount thereby moving said slide mount into and over the viewing area when said cage is rotated.
Claim 3
Dependent Claim
55 words
A slide projector as recited in claim 1 further including tray means for containing the stacked train of slide mounts therein and for receiving, in a stack, the train of slide mounts moved individually across the viewing area; and a fan means arranged in said housing so as to provide cooling of said light source.
Claim 4
Dependent Claim
107 words
A slide projector as recited in claim 1, wherein the lens means is arranged in a housing connected to the projector housing so as to be capable of rotation with respect thereto to move the lens housing away from the viewing area facilitating positioning of a slide mount thereover; means for locking the lens housing to the projector housing such that light passing through the slide in a slide mount enters the lens means; and guides arranged with said lens means housing, extending therefrom to engage the slide mount in the viewing area when the lens means housing is positioned to receive light into the lens means.
Claim 5
Dependent Claim
33 words
A slide projector as recited in claim 1 wherein the slide mounts are connected at their edges by installing an adhesive strip between said edges, on the face thereof opposite to said V.
Claim 6
Dependent Claim
91 words
A slide projector as recited in claim 1, wherein each slide mount is formed as an envelope having an opening arranged along one unconnected edge thereof to receive a slide fitted therein, which slide mount also has a central hole therethrough wherein the film portion of said slide is intended to be positioned; and the opening in each said mount is formed as a notch at a mid point in the edge of said mount opposite to said slide receiving opening, which notch just accommodates the tracking lug means passing therein.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |