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US3814514A Expired / Lapsed US ⏱️ 0.0 years remaining

Microform projection and viewer apparatus

Assignee: Xerox Corp
•
Filing: 1972-09-06
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Granted: 1974-06-04
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Expires: 1992-09-06
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Abstract

Abstract Apparatus for projecting and viewing microform images having a viewer housing including a viewing screen. A light source is supported therein for illuminating microform images on microform material. The light source is supported within a lamp housing and the lamp housing includes a plurality of fin members which extend externally outwardly therefrom to increase the heat transfer characteristics of the lamp housing. A light collecting reflector is supported within the lamp housing at one side thereof adjacent the light source and reflects radiation from the light source through an aperture in the lamp housing on the side opposite the collecting reflector along a first optical path. A condensing lens assembly along the first optical path illuminates microform images at a projection station and a projection lens assembly also along the first optical path projects the illuminated images onto a first reflecting member. The first reflecting member reflects the projected images along a second optical path onto a second reflective member which in turn reflects the projected images along a third optical path and onto the viewing screen. A carriage member is supported within the viewer housing and is adapted to receive a microform member. The carriage member provides a transportation arrangement for transporting the microform member in predetermined directions relative to the optical path and the projection station which directions are substantially mutually perpendicular. A guide arrangement is also provided for guiding a microform member from within the viewer housing for removal therefrom.

Inventors

  • 👤 J Douglas
  • 👤 L Adams
  • 👤 E Mycek
  • 👤 D Grafton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 10:36
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 225 words
A microform viewing and projection apparatus comprising in combination: a housing including a first section having a first slot and a viewing screen and a second, solid section, coupling means for providing pivotal rotation of said second section relative to said first section such that said second section can assume either an operative position or an inoperative position, a light source within said housing for illuminating microform images on microform material, means within said housing for focusing illumination from said light source onto said microform images, projection means for projecting illuminated images of said microform along a first optical path within said housing, a first reflective member interposed along said first optical path to reflect projected images along a second optical path, said first reflecting member having an end portion adjacent said coupling means, and a second reflective member interposed along said second optical path, said second reflective member being separate from said second housing section and pivotable from an operable position, that reflects projected images from said second optical path along a third optical path and onto said viewing screen, to an inoperable position, that does not reflect images along said third optical path, the support for said second reflective member and said second housing section providing a storage area when said second section and said second reflective member are in the operative position.
Claim 2
Dependent Claim 225 words
A microform viewing and projection apparatus comprising in combination: a housing including a first section having a first slot and a viewing screen and a second, solid section, coupling means for providing pivotal rotation of said second section relative to said first section such that said second section can assume either an operative position or an inoperative position, a light source within said housing for illuminating microform images on microform material, means within said housing for focusing illumination from said light source onto said microform images, projection means for projecting illuminated images of said microform along a first optical path within said housing, a first reflective member interposed along said first optical path to reflect projected images along a second optical path, said first reflecting member having an end portion adjacent said coupling means, and a second reflective member interposed along said second optical path, said second reflective member being separate from said second housing section and pivotable from an operable position, that reflects projected images from said second optical path along a third optical path and onto said viewing screen, to an inoperable position, that does not reflect images along said third optical path, the support for said second reflective member and said second housing section providing a storage area when said second section and said second reflective member are in the operative position.
Claim 3
Dependent Claim 26 words
The apparatus of claim 1 wherein said second reflective surface is pivoted about a point remote from the point about which said second section is pivoted.
Claim 4
Dependent Claim 197 words
The apparatus of claim 1 further including: a movable microform carriage member within said housing, means supporting said carriage member for movement thereof in a first direction relative to said first optical path, said carriage member including a projection portion which extends through said first slot and has a second slot therein for receiving microform, said projection portion providing for movement of said carriage member in a first direction and accordingly for movement in said first direction of microform inserted through said third slot, a first pair of rollers mounted on said carriage member, said first pair of rollers providing a first nip proximate to and substantially aligned with said second slot, a second pair of rollers mounted on said carriage member, said second pair of rollers providing a second nip substantially aligned with both said first nip and said second slot, said first and second pair of rollers being operatively coupled to a shaft extending through said housing such that rotation of said shaft produces rotation of all of said rollers and accordingly produces movement in a second direction of microform inserted through said third slot, said first and said second directions being substantially mutually perpendicular.
Claim 5
Dependent Claim 50 words
The apparatus of claim 1 further including a focus control assembly having a support member coupled to said projection means, said support member having a cam surface, a cam follower operably engaging said cam surface such that axial movement of said cam follower produces displacement of said focus control assembly.

References Cited (Backward Citations)

FR996137A Cited
US2847902A Cited
US3520599A Cited
US3667839A Cited
US3700321A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-03 1977-12-03 1978-06-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-03 1981-12-03 1982-06-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-03 1985-12-03 1986-06-04 $7700.00 Window Closed / Lapsed

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