Disposable camera with simplified film advance and indicator
First Claim
Patent Images
1. A disposable camera including a spring biased, rotatable film wind up roll;
- an end piece mounted on the wind up roll and bearing a circular groove thereon, and a plurality of equidistant stops spaced within the groove;
a film supply roll for feeding the wind up roll;
a downwardly biased member attached to the camera body and including a spring biased sheet with an engagement finger adapted to provide a sliding fit with the groove of the end piece to releasably engage the stops within the grooves and prevent rotation of the film wind up roll when thus engaged;
a lens;
a shutter;
a spring biased shutter actuator, indluding a retaining finger having a shallow indent, the retaining finger being adapted to elevate the engagement finger out of contact with a groove stop upon release of the shutter until the downwardly biased member engages a succeeding stop in the groove, and continued elevation of the shutter causes the retaining finger and downwardly biased member to separate, and the engagement finger to re-enter the groove and prevent further film windup when the engagement finger contacts a succeeding stop;
an edge portion of the downwardly biased member being sized to contact the indent of the retaining finger and stabilize movement of the engagement finger within the groove.
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Abstract
An inexpensive, small size, disposable camera is provided. The camera utilizes a preloaded film and includes a film strip indicator which is driven by the shutter mechanism for display at the front of the camera. A novel film advance mechanism is also provided that obtains a uniform and precise alignment of a film frame which coincides with a film numerical designation using conventional film without requiring a sprocket drive.
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Citations
8 Claims
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1. A disposable camera including a spring biased, rotatable film wind up roll;
- an end piece mounted on the wind up roll and bearing a circular groove thereon, and a plurality of equidistant stops spaced within the groove;
a film supply roll for feeding the wind up roll;
a downwardly biased member attached to the camera body and including a spring biased sheet with an engagement finger adapted to provide a sliding fit with the groove of the end piece to releasably engage the stops within the grooves and prevent rotation of the film wind up roll when thus engaged;
a lens;
a shutter;
a spring biased shutter actuator, indluding a retaining finger having a shallow indent, the retaining finger being adapted to elevate the engagement finger out of contact with a groove stop upon release of the shutter until the downwardly biased member engages a succeeding stop in the groove, and continued elevation of the shutter causes the retaining finger and downwardly biased member to separate, and the engagement finger to re-enter the groove and prevent further film windup when the engagement finger contacts a succeeding stop;
an edge portion of the downwardly biased member being sized to contact the indent of the retaining finger and stabilize movement of the engagement finger within the groove. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- an end piece mounted on the wind up roll and bearing a circular groove thereon, and a plurality of equidistant stops spaced within the groove;
Specification