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Compassler is a new stationary combined of ruler and compasses.
Graduations on the ruler are also radius scales on the compasses so that user wouldn't have to worry about finding compasses.
Compassler transforms the normal ruler by designing a hollow rail track. The hollow section is easy for user to see the content of the underneath paper. And the slide on the rail track with two holes is for different kind of pens to put in. Between the two holes is lock. User can fasten the lock and press the center button to draw a circle. The multi-functions of Compassler not only enhance the efficiency of learning but also create new usability for user
Jin Dian, Cheng Hsiao Yuan, Huang Tseng Yin, Lin