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US3678831A Expired / Lapsed US ⏱️ 0.0 years remaining

Compact folding reflex camera

Assignee: Polaroid Corp
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Filing: 1971-05-10
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Granted: 1972-07-25
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Expires: 1991-05-10
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Abstract

Abstract A compact, folding reflex camera formed by a plurality of housing sections and a thin walled, light opaque, flexible envelope, coupled together for relative movement between folded and extended positions. When the camera is extended, the envelope forms a chamber, within the extended housing sections, having openings therein through which light is selectively transmitted during viewing and exposure modes of operation. In the viewing mode of operation, one of the openings functions as part of the camera''s optical system by forming an entrance pupil for a viewing device, mounted on one of the housing sections, which is adapted to permit viewing of an image formed within the chamber.

Inventors

  • 👤 James G Baker

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 20:58
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12

Claims Analysis

Total Claims: 18
Claim 1
Independent Claim 295 words
A compact, folding, reflex camera comprising: a housing having a plurality of sections, including first, second, third, and fourth sections, interconnected for relative movement between folded and extended positions; a thin walled envelope formed of a flexible, light opaque material and having first, second, and third openings therein; means coupling said envelope to said housing in a lighttight manner for automatic movement with said sections between a folded position and an extended position wherein said envelope forms a chamber within said camera with said first and second openings, respectively, positioned adjacent said first and second housing sections and said third opening positioned adjacent said third housing section, to provide access for light transmission into and out of said chamber; exposure means supported by said first section and aligned with said first opening in said envelope for selectively admitting light reflected from scene into said chamber; means within said second section for positioning a film unit in alignment with said second opening in said envelope such that said light may pass from said chamber therethrough to cause exposure of the film unit; reflecting means supported by said fourth housing section for redirecting said light admitted by said exposure means toward said second opening; reflex means, movable within said chamber between a viewing position in which it prevents passage of said light through said second opening and provides an image of said scene from said light, and an exposure position in which it directs said light through said second opening to cause exposure of the film unit; and a viewing device supported by said third housing section and aligned with said third opening in said envelope for viewing said image provided by said reflex means, located in said viewing position, in preparation for exposing the film unit.
Claim 2
Dependent Claim 295 words
A compact, folding, reflex camera comprising: a housing having a plurality of sections, including first, second, third, and fourth sections, interconnected for relative movement between folded and extended positions; a thin walled envelope formed of a flexible, light opaque material and having first, second, and third openings therein; means coupling said envelope to said housing in a lighttight manner for automatic movement with said sections between a folded position and an extended position wherein said envelope forms a chamber within said camera with said first and second openings, respectively, positioned adjacent said first and second housing sections and said third opening positioned adjacent said third housing section, to provide access for light transmission into and out of said chamber; exposure means supported by said first section and aligned with said first opening in said envelope for selectively admitting light reflected from scene into said chamber; means within said second section for positioning a film unit in alignment with said second opening in said envelope such that said light may pass from said chamber therethrough to cause exposure of the film unit; reflecting means supported by said fourth housing section for redirecting said light admitted by said exposure means toward said second opening; reflex means, movable within said chamber between a viewing position in which it prevents passage of said light through said second opening and provides an image of said scene from said light, and an exposure position in which it directs said light through said second opening to cause exposure of the film unit; and a viewing device supported by said third housing section and aligned with said third opening in said envelope for viewing said image provided by said reflex means, located in said viewing position, in preparation for exposing the film unit.
Claim 3
Dependent Claim 34 words
A compact, folding, reflex camera as defined in claim 1 wherein said first and second openings in said envelope are positioned in obtusely disposed planes when said camera is located in said extended position.
Claim 4
Dependent Claim 34 words
A compact, folding, reflex camera as defined in claim 2 wherein said third opening in said envelope functions as part of said camera''s optical system when said reflex means is in said viewing position.
Claim 5
Dependent Claim 22 words
A compact, folding, reflex camera as defined in claim 3 wherein said third opening forms an entrance pupil for said viewing device.
Claim 6
Dependent Claim 53 words
A compact, folding, reflex camera as defined in claim 2 wherein said reflecting means is supported within said chamber by said fourth housing section for reflecting said light admitted by said exposure means and said first opening onto said reflex means located in said viewing position to form said image of said scene.
Claim 7
Dependent Claim 61 words
A compact, folding, reflex camera as defined in claim 5 wherein said reflex means is configured such that light emanating from said image is directed toward said reflecting means from where it is reflected through said third opening in said envelope and into said viewing device to permit viewing of said image provided by said reflex means through said viewing device.
Claim 8
Dependent Claim 64 words
A compact, folding, reflex camera as defined in claim 6 wherein said viewing device forms an image of said scene from said light reflected through said third opening, and said third opening is configured and positioned to form an entrance pupil for said viewing device for selectively limiting said light reflected therethrough to improve the quality of said image formed by said viewing device.
Claim 9
Dependent Claim 54 words
A compact, folding, reflex camera as defined in claim 7 wherein said third opening in said envelope is disposed so as to be contained in a plane which is tilted at a predetermined angle relative to a plane containing a reflective surface of said reflecting means and an optical axis of said viewing device.
Claim 10
Dependent Claim 37 words
A compact, folding, reflex camera as defined in claim 1 wherein said housing sections cooperate to form a four-sided articulated structure and said thin-walled envelope is adapted to form a six-sided chamber within said four-sided articulated structure.
Claim 11
Dependent Claim 57 words
A compact, folding, reflex camera as defined in claim 9 wherein said six-sided chamber includes four substantially planar side walls disposed such that they are substantially parallel with said first, second, third and fourth housing sections, respectively, and two substantially planar end walls depending from said four side walls and disposed in parallel relation with one another.
Claim 12
Dependent Claim 63 words
A compact, folding, reflex camera as defined in claim 10 wherein said side wall of said envelope containing said third opening further includes a recessed portion and said third opening is in a wall of said recessed portion to tilt said opening at a predetermined angle relative to an optical axis of said viewing device when said camera is in said extended position.
Claim 13
Dependent Claim 38 words
A compact, folding, reflex camera as defined in claim 11 wherein said reflex means is configured having substantially linear lateral edges disposed adjacent to and parallel with said end walls of said chamber formed by said extended envelope.
Claim 14
Dependent Claim 23 words
A compact, folding, reflex camera as defined in claim 12 wherein said thin-walled, flexible, light opaque envelope is formed of an elastomer material.
Claim 15
Dependent Claim 82 words
A compact, folding, reflex camera as defined in claim 13 wherein at least that portion of said envelope which forms said end walls of said chamber is stressed when said camera is located in said extended position to maintain said end walls in a substantially planar condition thereby insuring sufficient clearance between said lateral edges of said reflex means and said end walls of said chamber to prevent binding therebetween when said reflex means is moved between said viewing and exposure positions.
Claim 16
Dependent Claim 29 words
A compact, folding, reflex camera as defined in claim 14 wherein said end walls are stressed in a vertical direction when said camera is located in said extended position.
Claim 17
Dependent Claim 30 words
A compact, folding, reflex camera as defined in claim 2 wherein planes containing said second and third openings in said extended envelope intersect to form an acute included angle therebetween.
Claim 18
Dependent Claim 30 words
A compact, folding, reflex camera as defined in claim 2 wherein planes containing said first and third openings in said extended envelope intersect to form an acute included angle therebetween.

References Cited (Backward Citations)

US3545357A Cited
US3561339A Cited
US3561340A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-07-25 1976-01-24 1976-07-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-25 1980-01-24 1980-07-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-25 1984-01-24 1984-07-25 $7700.00 Window Closed / Lapsed

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