Slide projector apparatus
OwnerBruno Meyerinventor
Life of this patent
Estimating the term…
Abstract
A slide projector is juxtaposed with a slide magazine in a housing. One of the projector and magazine is movably mounted so that each slide may be aligned with where it may be loaded into the projector and unloaded back into the magazine. At the loading station a pair of pivotable, opposed toggles operated by an eccentric device frictionally rollingly grip and release two opposite edges of the slide with reversibly driven rollers. In a disclosed elaboration, a plurality of slide magazines are disposed on a spider, which may be rotated to bring any selected magazine into juxtaposition with the projector. In the elaborated version shown, the slide projector is laterally movably mounted for temporary retraction during indexing of the spider.
Claims17
In a slide projecting apparatus which includes:
- a projector for projecting a light beam along a path and having a slide projecting station located in a plane which crosses said path;
- at least one magazine with a succession of laterally open cells, each for slidably removable receipt of a respective slide the magazine having a disposition wherein said magazine extends along said path but being laterally displaced therefrom;
- means for axially moving said succession of cells relative to said projecting station so as to make it possible to bring each cell into said plane of said projecting station;
- and
- changing means associated with one of said projector and magazine for laterally displacing such slide as is in such said cell as is then in said plane of said projecting station, along said plane into said path for projection of said beam therethrough, and for laterally displacingly returning such slide as is in said path laterally along said plane into a respective said cell,
- the improvement wherein:
- said changing means comprises:
- two toggle levers each having first and second opposite end portions and means journalling each toggle lever for swivelling about an axis between said first and second end portions thereof;
- drivable eccentric means in operative contact with the respective first end portions of the two toggle levers, mounted for movement between a first condition wherein the second end portions of two toggle levers are located relatively nearer to one another and a second condition wherein the second end portions of the two toggle levers are located relatively further apart;
- the said second end portions each including a driven tractive surface element means in said plane and means for reversibly driving said tractive surface element in said plane;
- said tractive surface element means being disposed to frictionally engage opposite edges of such slide as is located in said plane, whether in said magazine or in said projector or in transit therebetween, only when said toggle levers are in said first condition, for transferring selected slides back and forth between said magazine and said projector.
Dependencies are inferred from the claim text.