| 摘要 |
A microfiche camera embodying a film-indexing mechanism for frame-by-frame and row-by-row exposure of the film in a grid-like fiche pattern, the drive embodying a first carriage mounted for linear movement on a frame, a second carriage mounted for linear cross-motion on the first carriage, and a step-by-step drive for each carriage including a ball screw, a traveler on the screw, a latch member on the traveler and a pivotable catch member bearing a plurality of projecting teeth with spacings between the teeth corresponding to a dimension of the fiche frames.
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