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US 4,358,184 AGranted
Compact collapsible microform viewer
AssigneeTopper Manufacturing Corporation
InventorDetlef E. Schmidt
Life of this patent
Estimating the term…
Abstract
A microform viewer has a case section pivotally mounting a screen, to move from a collapsed position to a viewing position, and slidably receiving a two-part projection section that telescopes into the case section. As the projection section moves into and out of the case section it positively drives the screen between collapsed and display positions. The projection section is made of two mutually separable housings that fit together along the film path so that when the two housings are separated the two pressure plates forming part of the film path are readily accessible.
Claims20
A microform viewer comprising
- a case section,
- a projection section telescopically associated with said case section and slidably mounted thereto for motion between a closed position in which at least a portion of the projection section is telescoped within said case section and an operative position in which at least part of the projection section is displaced from the case section, said projection section including means for positioning film bearing an image to be projected, means for illuminating such film, and means for projecting an image of said illuminated film,
- a screen section pivotally connected to said case section for movement between a retracted position adjacent said case section and a display position displaced therefrom, said screen section including a display screen,
- means in said case section for reflecting light from said projection section to said screen, and
- drive means for interconnecting said projection and screen sections to drive said screen section between its retracted and display positions in response to motion of said projection section between its closed and operative positions, said drive means comprising a cam surface on one of said projection and screen sections and a cam fixed to the other of said projection and screen sections in slidable engagement with said cam surface.
2 more elements
A microform projector comprising a first housing having a lens for projecting an image of illuminated film,
- a second housing mounted to said first housing and having means for illuminating film bearing an image to be projected,
- said first and second housings defining a film receiving path therebetween, whereby film may be moved and positioned in said path for illumination by light from said first housing, and whereby an image of such illuminated film may be projected by the lens of the second housing, said projector including a case section, said first and second housings being slidably mounted to said case section for motion between a closed position in which at least a portion of one of said housings is telescoped within said case section and an operating position in which at least one of said housings is displaced from said case section, a screen section mounted to said case section for movement between a retracted position adjacent said case section and a display position displaced therefrom, said screen section including a display screen, and actuating means interconnecting at least one of said housings and said screen section for driving the screen section between its retracted and display positions in response to motion of said one housing between its closed and operative positions.
A compact collapsible microform viewer comprising
- an open case section having a bottom, a forward wall, a pair of mutually spaced sidewalls and first and second laterally projecting pivot elements fixed to rear portions of said sidewalls,
- first and second arcuate slots formed in said sidewalls,
- said section having first and second mutually spaced guide elements extending forwardly from the rear of said case section,
- a reflector mounted in said case section adjacent said forward wall,
- a screen section having a display screen mounted thereon and having a pair of mutually spaced rearwardly extending mounting brackets, each bracket having a pivotal connection to one of said case section pivot elements, said screen section also including cam means fixed thereto,
- a projection section comprising a housing telescopically associated with said case section and having longitudinally extending guide elements engaged with said case section guide elements to slidably mount the projection section to the case section for motion between a closed position in which at least a portion of the projection section is telescoped within said case section and an operative position in which the projection section is at least partly displaced from the case section,
- and
- cam means on said projection section engaged with the cam means of said screen section for pivoting said screen section relative to said case section in response to motion of the projection section between its closed and operative positions.
5 more elements
Dependencies are inferred from the claim text.