Picture poster viewer

Claim 1

A picture poster viewing device for the viewing through an aperature of a single individual picture on a strip imprinted with a plurality of pictures comprising, a picture frame adaptable for mounting to a flat surface, said frame formed with an open viewing aperature, a strip of flexible sheeting upon which a plurality of pictures are imprinted, with the opposed ends of said strip mounted upon a pair of rollers, rotatably mounted in spaced parallel orientation, each located on an opposite side of the viewing aperature from the other, reversible motorized means to rotate both rollers so as to wind the strip upon one roller and unwind the strip upon the other roller, said motorized means rotatably linked to a drive shaft, with each roller fixed to an individual roller shaft, each roller shaft fitted with a first bevel gear, about the boss of which flat frictional spring means are externally wound to serve as a clutch brake, each said first bevel gear being individually meshed with a second bevel gear, each of said second bevel gears being joined to the drive shaft by an individual clutch assembly incorporating a coil spring joining the drive shaft to the clutch assembly in constant tension and a compression spring biasing the respective clutch assembly against each of the second bevel gears, with the frictional spring means about the boss of each of the first bevel gears being wound in an opposite direction from the frictional spring means wound about the other first bevel gear, so that in a given direction of rotation of the drive shaft, one of the first bevel gears is under braking torque causing the clutch assembly of the associated second beveled gear to slip with relation to the drive shaft, and retarding the motion of the roller associated with said first bevel gear.