G - Physics – 03 – B
Patent
G - Physics
03
B
88/20
G03B 21/54 (2006.01) G02B 27/02 (2006.01)
Patent
CA 1051236
Abstract of the Disclosure Cartridge viewer having means forming a framework with indexing means mounted thereon. The indexing means has an aperture therein and a pair of spaced apart index projec- tions disposed on opposite sides of the aperture. A continu- ous length of film having perforations along one edge thereof is provided. Guide means is provided for guiding the film over the indexing means and past the aperture. A sprocket engages the film. A drive member is rotatably mounted in the framework and is connected to the sprocket for driving the sprocket and advancing the film past the aperture. Crank means accessible from the exterior of the framework is pro- vided for rotating the drive member. The spool is rotatably mounted in the framework and a portion of the length of film is formed as a roll on said spool with said spool being formed so that the film can be payed out continuously either from the inside of the roll or from the outside of the roll. Optical means is carried by the framework for viewing the film in the aperture. The framework carries an eyepiece which can be placed adjacent the eye to permit viewing of the image in the optical means. Means is provided within the framework for receiving light exterior of the cartridge and for directing light through the film disposed in the aperture so that the portion of the film which is disposed in the aperture is visible through the optical means. -1-
252106
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