Cushman, Darby & Cushman
Positioning mechanism
 A positioning mechanism comprising three pantagraphs supporting a table on a base. Each pantagraph is constructed of four links connected into the form of a quadrilateral. The table is positioned to permit with six degrees of freedom by regulating the angle of inclination of each of the six lower links of the pantagraphs with respect to the base. 
Sumitomo Electric Industries Ltd.
B B F F F B B B B
B23P B25J F16M F16M F16M B23Q B25J B25J B25J
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Akira Yasushi Hirochika Ken-Ich
Takemoto Kida Inoue Yoshida