| 摘要 |
The apparatus comprises a box shaped body and a clamping member, movably supported between first and second operative positions to lock and respectively release a work piece. A linear detecting device generates a set of control signals for a control unit, during the movement between the operative positions of the clamping arm. The detecting device comprises a first and a second sensor and indexing means in the form of a comb-shaped member having spaced apart teeth to sequentially activate the sensors and provide the set of control signals during the movement of the clamping member.
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