An X-Y Platform for RANDSIGHT-Type Instruments
Describes a hand-operated mechanical device called an X-Y Platform that, when used with RANDSIGHT-type closed circuit TV systems for the partially sighted, permits design simplifications that lead to lower costs without sacrificing instrument quality or effectiveness. The device is placed on a desk or table below a fixed TV camera. Reading or writing materials are placed on its upper surface, which may be easily moved to the left or right and toward or away from the user so the camera can traverse a line of print or shift from line to line. The platform thus eliminates the need for a movable camera. A detailed discussion of the construction of the platform, illustrations, and recommendations for its operation should be of value to those who wish to construct their own platforms.