| 摘要 |
PURPOSE:To easily move a specified image frame to a specified position in a short time by inclining a single operational lever in a direction to which a microfilm should be moved. CONSTITUTION:The operational lever 7 is constituted in such a way that it can be freely inclined in every direction of X(+), X(-), Y(+) and Y(-). If the lever 7 is inclined, the arm parts 15b and 16b of a rotary axes (a) and (b) rotate variable resistance 15 and 16 so as to alter resistance values. Based on the alteration of the resistance values, the motors in the X and Y directions are controlled and the microfilm is moved in the direction, where the lever 7 is inclined, at speed according to the tilt angle. Then, the image frame can be easily moved to the specified position by the single operational lever in a short time.
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