| 摘要 |
Apparatus for enabling and disabling relative rotary movements between two members (14, 16) rotatable about a common axis comprises a plurality of circumferentially spaced locking pins (40) carried by one of the members (16, 37) and a plurality of circumferentially spaced sockets (26) in the other of the members (14, 22), the pins (40) and sockets (26) being uniformly spaced from the axis of rotation and each of the sockets (26) being of such size as to accommodate any of the pins (40). The number of pins (40) is different from the number of sockets (26), the angular spacing between adjacent pins (40) is uniform, and the angular spacing between adjacent sockets (26) is uniform, but different from the spacing between adjacent pins (40). |
