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US3740127A Expired / Lapsed US ⏱️ 0.0 years remaining

Projector apparatus

Assignee: Polaroid Corp
•
Filing: 1971-08-24
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Granted: 1973-06-19
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Expires: 1991-08-24
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Abstract

Abstract A rear projection viewer, for projection of images of a film strip housed in a motion picture cassette, employing a single reflective mirror and an inclined viewing screen in a compact arrangement wherein the screen provides substantially the complete front face of the viewer. In its preferred embodiment, the viewer is configured for operation of a multipurpose cassette for processing of the film strip of such cassette and subsequent projection of the images recorded on such film strip, and the cassette includes a processing station adapted for optimumly dispensing processing fluid across the film strip when the cassette is maintained in an attitude such that the incremental sections of the film progressively advanced across the projection station opening are located in a predetermined plane. A cassettereceiving well, disposed in the top of the viewer housing, is adapted to receive the cassette and locate it below the top of the screen in an operative position with the progressively advanced, incremental sections of film disposed in the predetermined plane. Preferably, the screen is a lenticular structure which transmits projected images substantially uniformly over a given viewing zone, and additionally directs the viewing zone downwardly from an axis normal to the screen in at least partial compensation for the angle of inclination of the screen such that the viewing zone will include an audience area located along the longitudinal axis of the apparatus.

Inventors

  • 👤 R Young
  • 👤 P Baker
  • 👤 S Bennett

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 06:58
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/602; G03B21/10

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 461 words
A compact, portable photographic apparatus intended for mounting on a stand for use with a photographic film cassette for projection of images recorded on a film strip carried in such cassette for viewing of such images by both a seated and a standing audience, such cassette including a casing formed by a pair of substantially parallel side walls joined together at their edges by one or more edge walls, an opening located in a given edge wall for facilitating film projection operations, and means located in one of said side walls for progressively advancing such film strip across such opening responsive to actuation by external drive means, said apparatus comprising: a housing having a base defining a support surface, a front viewing face, and a top surface of generally planar configuration extending rearwardly from the top edge of said front face, in generally parallel relation to said support surface; means for receiving such cassette in an operative location rearwardly of said face, said receiving means including a slotlike opening in said top surface and a cassette-receiving well in communication with said slot-like opening, said well being configured for receiving such cassette with its such opening in a lowermost location; drive means disposed alongside said well and configured for cooperation with such advancing means of such cassette for advancing such film strip across such cassette opening when such cassette is received in its operative location in said well; and image projecting means mounted within said apparatus housing for projecting images of such film strip toward said front face, said image projecting means including lens means, disposed below said well in operative relation to such cassette opening when such cassette is received in its said operative location, for projecting images of such film downwardly along a first axis substantially normal to said support surface, and a single reflective element located in adjoining relation to said base and configured for redirecting such images along an upwardly inclined axis toward said front face, said front face including a viewing screen inclined rearwardly over said base and substantially normal to said upwardly inclined axis so as to minimize pictorial distortion, the top edge of said screen being in close relationship to said top surface, said screen serving to define substantially the entire front face of said housing, said screen including means for directing such projected images forwardly over a restricted viewing zone whose bisecting axis is rotated downwardly with respect to said upwardly inclined axis in at least partial compensation for the upward inclination thereof such that said viewing zone includes an audience located forwardly of said apparatus in a plane passing through the center of said screen and in substantially parallel relation to said base thereby permitting viewing by both a seated and standing audience.
Claim 2
Dependent Claim 461 words
A compact, portable photographic apparatus intended for mounting on a stand for use with a photographic film cassette for projection of images recorded on a film strip carried in such cassette for viewing of such images by both a seated and a standing audience, such cassette including a casing formed by a pair of substantially parallel side walls joined together at their edges by one or more edge walls, an opening located in a given edge wall for facilitating film projection operations, and means located in one of said side walls for progressively advancing such film strip across such opening responsive to actuation by external drive means, said apparatus comprising: a housing having a base defining a support surface, a front viewing face, and a top surface of generally planar configuration extending rearwardly from the top edge of said front face, in generally parallel relation to said support surface; means for receiving such cassette in an operative location rearwardly of said face, said receiving means including a slotlike opening in said top surface and a cassette-receiving well in communication with said slot-like opening, said well being configured for receiving such cassette with its such opening in a lowermost location; drive means disposed alongside said well and configured for cooperation with such advancing means of such cassette for advancing such film strip across such cassette opening when such cassette is received in its operative location in said well; and image projecting means mounted within said apparatus housing for projecting images of such film strip toward said front face, said image projecting means including lens means, disposed below said well in operative relation to such cassette opening when such cassette is received in its said operative location, for projecting images of such film downwardly along a first axis substantially normal to said support surface, and a single reflective element located in adjoining relation to said base and configured for redirecting such images along an upwardly inclined axis toward said front face, said front face including a viewing screen inclined rearwardly over said base and substantially normal to said upwardly inclined axis so as to minimize pictorial distortion, the top edge of said screen being in close relationship to said top surface, said screen serving to define substantially the entire front face of said housing, said screen including means for directing such projected images forwardly over a restricted viewing zone whose bisecting axis is rotated downwardly with respect to said upwardly inclined axis in at least partial compensation for the upward inclination thereof such that said viewing zone includes an audience located forwardly of said apparatus in a plane passing through the center of said screen and in substantially parallel relation to said base thereby permitting viewing by both a seated and standing audience.
Claim 3
Dependent Claim 24 words
The apparatus of claim 1 wherein said reflective element extends within said base and at least partially below the bottom edge of said screen.
Claim 4
Dependent Claim 17 words
The apparatus of claim 2 wherein said base is recessed from said front face of said housing.
Claim 5
Dependent Claim 32 words
The apparatus of claim 2 wherein said viewing screen includes a plurality of horizontally arranged, elongated lenticules which are asymmetrical in the vertical direction so as to direct said viewing zone downwardly.
Claim 6
Dependent Claim 50 words
The apparatus of claim 4 wherein said screen is inclined at an angle of approximately 22* to said support surface, said lenticules provide a viewing angle of approximately 39* in the vertical plane whose bisecting axis is directed downwardly approximately 4 1/2 * from the axis normal to said screen.

References Cited (Backward Citations)

US2326042A Cited
US2464220A Cited
US2531399A Cited
US2596049A Cited
US2567656A Cited
GB766051A Cited
US3195401A Cited
US3191495A Cited
US3383998A Cited
US3279314A Cited
US3592537A Cited
US3608455A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-06-18 1976-12-18 1977-06-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-06-18 1980-12-18 1981-06-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-06-18 1984-12-18 1985-06-19 $7700.00 Window Closed / Lapsed

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