Patent ID: 6402521
Filing Date: 2002-06-11
Classification: G01D,G09B

Abstract:
Apparatus for demonstrating changes in motion with respect to time, comprising a first array of photosensitive elements (21, . . . , 2i, . . . , 2N) and a second array of light emitting sources (31, . . . , 3i, . . . , 3N), each array placed on two parallel straight lines such that said photosensitive elements and said light emitting sources are spaced uniformly and, in both arrays, equally, an object, and rails upon which said object is movable, said rails placed parallel to said first and second arrays, a light beam source for emitting a collimated light beam fastened to said object, wherein said light beam source, at any moment in time during motion of the object, illuminates at least one of said photosensitive elements, and wherein each photosensitive element within said parallel line of photosensitive elements is connected to a first input of a logic AND gate, and a clock for providing clock pulses to a second input of said AND gate, and wherein an output of said AND gate is connected to a logic flip-flop element, the output of which is connected to the corresponding light emitting source to activate the light emitting source.