Abstract: The microfiche reader has two lenses carried by a segment mounted on an eccentric pivot which can be adjusted to move the pivot and, therefore, the lenses are in an eliptical orbit which permits the lens in the operative position to be centered on the optical path. When the segment is shifted to move the other lens into position that lens will be centered. Each lens is focused by moving the associated focusing slide in and out to move the parallel cams under the bosses carried by the lens barrel flange to raise and lower the lens to focus the image. The image is centered on the screen by adjusting the first mirror which is mounted on a bracket which pivots on a housing partition and has a wedge between the bracket and the partition. The bracket has teeth which engage serrations on the wedge so when the retaining screw is tightened the wedge is locked in place.

Abstract: This invention relates to an optical method of inserting a subject image into a background image to create a composite image by projecting the background image onto a light-reflecting countermatte of the subject image and causing the subject image to appear in the non-reflective part of the countermatte. The invention includes an apparatus for carrying out the method.

Abstract: Apparatus is disclosed for viewing photographic slides carried in a long magazine by a slide projector which is configured to accept only a circular slide magazine or carrousel. This invention provides a simple and efficient mechanism for using long magazines with a circular magazine projector without the need of first transferring by hand all of the slides from the long magazine into a circular magazine. An attachment adapted to be fastened to the projector housing has a covered channel for accepting and advancing a long magazine inserted therein. Adjacent the long magazine within the attachment is an intermediate storage tray which contains slide compartments and which is moved synchronously with the long magazine. Slanting guide rails extend from the long magazine to the intermediate storage tray, and these rails individually transfer the slides from the long magazine into the storage tray as the long magazine is advanced.

Abstract: A compact, smoothly operating, X-Y positioning mechanism for use in microfiche projecting apparatus is disclosed. The positioning mechanism occupies an area substantially the same size as one microfiche, however is displaceable over an area approximately four times as large. Smooth translation of the positioning mechanism is provided by two pairs of parallel rollers, the rollers of one pair being disposed perpendicularly to the other pair to allow for positioning in any direction.