| 摘要 |
A pair of bell cranks pivoted to a support member provide a pair of crossed upper arms for suspension from a crane hook, and a pair of transversely spaced lower arms equipped with opposing jaws. The jaws are provided with sockets and with bits to selectively engage lifting lugs of an ingot mold with the sockets, or to grip an ingot with the bits. An actuating line connected to the support member moves the arms toward or away from each other, and parallel motion links between the support member and the jaws maintain a constant angular attitude of the sockets and bits throughout the range of movement of the arms.
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